US Pat. No. 9,088,193

MOTOR EXCITING DEVICE AND MOTOR EXCITING METHOD AND MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD

Aida Engineering, Ltd., ...

1. A motor exciting device for selecting a plurality of optional axes of a permanent magnet synchronous motor having multiple-phase
windings of as many as N axes (N?2) and positionally relating an encoder and a magnetic pole position of the motor by independently
exciting the windings of each of the selected plurality of axes, the motor exciting device comprising:
an exciting current command unit which generates exciting current commands for the selected plurality of axes totaling K sets
(K?N); exciting devices for individual axes which receive the exciting current commands and supply DC exciting currents to
the windings of the K sets of axes; and a storage unit which stores an encoder value,

wherein the exciting devices for individual axes DC-excite the windings of the K sets of axes based on the exciting current
commands such that the magnetomotive forces of the windings of the K sets of axes are shifted in phase from one another by
?/K, and

wherein an encoder value collected when the motor is stably stopped by the DC excitation is stored in the storage unit as
an initial position.

US Pat. No. 9,501,052

DIE CUSHION FORCE CONTROL METHOD AND DIE CUSHION APPARATUS

AIDA ENGINEERING, LTD., ...

1. A die cushion force control method that outputs a predetermined die cushion force command value and generates a die cushion
force on a cushion pad based on the die cushion force command value, the die cushion force control method comprising:
initially outputting a die cushion force command value equal to or larger than a target die cushion force command value in
order to suppress an initial die cushion force overshoot generated when the target die cushion force command value configured
to be stepwise is used as the die cushion force command value;

then outputting a die cushion force command value decreased continuously or stepwise to be smaller than the target die cushion
force command value; and

subsequently outputting a die cushion force command value increasing continuously or stepwise to be equal to the target die
cushion force command value.

US Pat. No. 9,144,903

SERVO TRANSFER FEEDER AND METHOD FOR CONTROLLING SERVO TRANSFER FEEDER

AIDA ENGINEERING, LTD., ...

2. The servo transfer feeder as defined in claim 1,
wherein the transfer motion generation section includes a lap setting section that sets an overlapping time when combining
the motion cam curve of each motion by setting a motion start time and a motion end time of adjacent motion cam curves so
that the motion start time of a subsequent motion cam curve is earlier than the motion end time of a preceding motion cam
curve.

US Pat. No. 9,108,379

TANDEM PRESS LINE

AIDA ENGINEERING, LTD., ...

1. A tandem press line comprising:
a control system including a controller, the control system being configured to supply a line master control signal, an individual
press control signal that corresponds to and is synchronized with the line master control signal and an individual transfer
control signal that corresponds to and is synchronized with the line master control signal;

a plurality of presses that perform a synchronized press control for each of the plurality of presses by using the individual
press control signal; and

a plurality of transfer systems that are alternately disposed with the plurality of presses in a line direction, and perform
a synchronized transfer control for each of the plurality of transfer systems by using the individual transfer control signal,

wherein the controller is configured to:
perform a synchronized low-speed press control for each of the plurality of presses by using a low-speed individual press
control signal that corresponds to and is synchronized with a low-speed line master control signal when the line master control
signal has been switched from a high-speed line master control signal to the low-speed line master control signal;

determine whether or not a slide position of each of the plurality of presses under the synchronized low-speed press control
is within a press region;

switch the synchronized low-speed press control to a non-synchronized high-speed press control using a non-synchronized high-speed
individual press control signal that is not synchronized with the low-speed line master control signal for a press among the
plurality of presses having a slide position that has been determined to be within the press region at least during a period
in which the slide position is within the press region;

stop the non-synchronized high-speed press control on condition that the slide position under the non-synchronized high-speed
press control has reached a press resynchronization point; and

switch the non-synchronized high-speed individual press control signal to the low-speed individual press control signal for
resynchronization, and automatically switch the non-synchronized high-speed press control that has been stopped to the synchronized
low-speed press control on condition that a phase of the low-speed line master control signal has become equal to a phase
of the non-synchronized high-speed individual press control signal.

US Pat. No. 9,650,209

CONVEYING DEVICE

AIDA ENGINEERING, LTD., ...

1. A conveying device, comprising:
first and second annular continuous bodies each extending in a conveying direction of an object to be conveyed, the first
and second annular continuous bodies each being rotationally driven and being arranged along a conveying lateral direction
which is orthogonal to the conveying direction;

a first slat mounted on the first annular continuous body, the first slat moving along the conveying direction in conjunction
with the first annular continuous body;

a second slat mounted on the second annular continuous body, the second slat moving along the conveying direction in conjunction
with the second annular continuous body, and

rotating bodies around which the first and second annular continuous bodies are respectively looped,
the conveying device conveying the object, the object being placed on upper surfaces of the first and second slats, each of
which having a length in the conveying lateral direction greater than a width of one of the first and second annular continuous
bodies,

wherein the first and second slats extend in the conveying lateral direction so as to respectively protrude from the first
and second annular continuous bodies when viewed from a vertical direction orthogonal to both of the conveying direction and
the conveying lateral direction,

wherein the first and second slats are arranged in a staggered manner without overlapping with each other when viewed from
the vertical direction, and

wherein the first and second annular continuous bodies have an interval therebetween in the conveying lateral direction, the
interval being expandable and contractable,

wherein the interval between the first and second annular continuous bodies in the conveying lateral direction is expandable
and contractable by moving the rotating bodies along a direction of a rotation center axis of the rotating bodies,

wherein the rotating bodies move along the direction of the rotation center axis of the rotating bodies through intermediation
of two ball screw mechanisms engaging with an outer peripheral thread of a shaft extending in the conveying lateral direction,

wherein the outer peripheral thread comprises:
a right-handed thread portion obtained by cutting a right-handed thread in an outer periphery of the shaft; and
a left-handed thread portion obtained by cutting a left-handed thread in the outer periphery of the shaft,
the right-handed thread portion and the left-handed thread portion each engaging with the two ball screw mechanisms, and
wherein the two ball screw mechanisms move to approach each other when the shaft is rotated in one direction, and the two
ball screw mechanisms move to separate from each other when the shaft is rotated in a reverse direction.

US Pat. No. 9,808,849

SLIDE CUSHION DEVICE OF PRESS MACHINE

AIDA ENGINEERING, LTD., ...

1. A slide cushion device of a press machine, comprising:
a plurality of hydraulic cylinders integrally formed in a board included in a slide of the press machine, or in a board provided
immediately below the slide;

a pressing member that is disposed in a recessed portion of an upper die that vertically moves together with the slide, in
a vertically movable manner, and that presses a material with a projecting portion of a lower die facing the upper die;

a plurality of cushion pins that is provided in the pressing member and penetrates the upper die to be brought into contact
with a piston member of the hydraulic cylinder, wherein a number of the plurality of cushion pins is less than a number of
hydraulic cylinders disposed in a plane of projection of the recessed portion of the upper die; and

a slide cushion hydraulic device that controls at least hydraulic pressure that is to be supplied to a compression chamber
of the hydraulic cylinder with which the cushion pins are to be brought into contact.

US Pat. No. 9,669,446

DIE CUSHION FORCE SETTING APPARATUS

AIDA ENGINEERING, LTD., ...

1. A die cushion apparatus comprising:
a cushion pad supported by drive shafts;
die cushion force generators coupled to the drive shafts, respectively, and configured to generate die cushion forces at positions
of the cushion pad, respectively, each position of which is supported by corresponding one of the driving shafts which is
coupled to corresponding one of the die cushion force generators;

a first input device configured to receive one die cushion force;
a second input device configured to receive additional information in order to numerically compute the die cushion forces
to be generated at the positions of the cushion pad, respectively;

a computing device configured to numerically compute the die cushion forces to be generated at the respective positions of
the cushion pad based on the one die cushion force from the first input device and the additional information from the second
input device;

a die cushion force command device configured to generate die cushion force commands for the die cushion force generators,
respectively, based on the die cushion forces from the computing device; and

a die cushion force controller configured to control each of the die cushion force generators based on corresponding one of
the of die cushion force commands from the die cushion force command device to cause the die cushion force generators to generate
the die cushion forces, respectively.

US Pat. No. 10,160,175

PRESS MACHINE AND METHOD FOR CONTROLLING SLIDE OF PRESS MACHINE

Aida Engineering, Ltd., ...

1. A press machine comprising:a main slide reciprocable in a rectilinear advancing direction;
a main slide drive device configured to drive the main slide to reciprocate in the rectilinear advancing direction;
a sub-slide on which a mold is mounted, the sub-slide reciprocable in the same direction as the main slid, and a compression force applied to the main slide being transmitted to the sub-slide through hydraulic pressure, wherein the main slide and the sub-slide constitute a cylinder-piston mechanism, and the main slide is one of a cylinder and a piston of the cylinder-piston mechanism, while the sub-slide is the other of the cylinder and the piston of the cylinder-piston mechanism;
a sub-slide drive device configured to drive the sub-slide to reciprocate relative to the main slide, the sub-slide drive device driving the sub-slide to reciprocate in the same direction as the main slide in response to a change in the hydraulic pressure; and
a vibration control device configured to control, through the sub-slide drive device, the sub-slide to vibrate at least two times during one press operation cycle, by periodically changing the hydraulic pressure, wherein
a material is formed through cooperation between the main slide drive device and the sub-slide drive device during the one press operation cycle.

US Pat. No. 9,815,251

SLIDE MOTION CONTROL APPARATUS FOR MECHANICAL PRESS

AIDA ENGINEERING, LTD., ...

1. A slide motion control apparatus for a mechanical press, comprising:
a slide which is disposed so as to be relatively vertically movable with respect to a driven body to which a drive force is
transmitted through a con rod of the mechanical press;

a relative position command unit that outputs a relative position command indicating a relative position of the slide with
respect to the driven body;

a relative position detecting unit that detects a relative position of the slide with respect to the driven body, and outputs
a relative position detecting signal indicating the detected relative position;

a servomotor;
a drive mechanism that is arranged between the driven body and the slide, and relatively moves the slide with respect to the
driven body by a drive force of the servomotor;

a control unit that controls the servomotor based on a relative position command signal output from the relative position
command unit, and the relative position detecting signal output from the relative position detecting unit; and

an angular speed detecting unit that detects an angular speed of the servomotor, wherein
the control unit controls the servomotor based on a second operation amount corresponding to a deviation between an angular
speed signal detected by the angular speed detecting unit and a first operation amount corresponding to a deviation between
the relative position command signal and the relative position detecting signal.

US Pat. No. 9,808,848

DIE CUSHION APPARATUS OF PRESS MACHINE AND DIE CUSHION CONTROLLING METHOD

AIDA ENGINEERING, LTD., ...

1. has been replaced with the following:
A die cushion apparatus of a press machine comprising:
a cushion pad supporting a plane face of the cushion pad comprised of cushion pins supporting blank holding plates for holding
a material to be formed within a space proximal to a respective set of die including a lower die, in parallel to the lower
faces of an upper die affixed to a plane face of the slide;

multiple cushion pad raising and lowering devices configured to raise and lower the cushion pad by separately-controllable
multiple driving shafts;

a die cushion position instruction generating unit configured to output multiple position instruction values, each of which
individually instructs a position in a raising and lowering direction of the cushion pad corresponding to a position of each
driving shaft of the multiple cushion pad raising and lowering devices, the die cushion position instruction generating unit
including multiple standby position instruction values for at least holding the cushion pad at a standby position, the multiple
standby position instruction values being separate from each other, and outputting the multiple standby position instruction
values after knocking out a product;

multiple die cushion position detecting devices configured to detect the position in the raising and lowering direction of
the cushion pad corresponding to the position for each driving shaft of the multiple cushion pad raising and lowering devices,
and separately output position detection values indicating the detected positions;

an information acquiring device configured to acquire information regarding inclination of the cushion pad in a duration of
die cushion force control based on the position detection values outputted from the multiple die cushion position detecting
devices; and

a controlling device configured to separately control the multiple cushion pad raising and lowering devices based on the multiple
position instruction values outputted from the die cushion position instruction generating unit, and on the multiple position
detection values outputted from the multiple die cushion position detecting devices, the controlling device configured to
move the cushion pad to the standby position based on the multiple standby position instruction values outputted from the
die cushion position instruction generating unit after knocking out the product,

wherein the multiple standby position instruction values are individually adjusted based on the information acquired from
the information acquiring device to allow the cushion pad to be held, before applying die cushion force control, on standby
holding the material in parallel with lower faces of dies mounted to the slide of the press machine in an inclined state of
the dies with respect to the plane face of the slide of the press machine.

US Pat. No. 9,233,411

WORK TRANSFER APPARATUS WITH CROSSBAR MEMBERS

AIDA ENGINEERING, LTD., ...

1. A work transfer apparatus comprising:
an arm configured to convey workpieces to or from a machine configured to process the workpieces;
a crossbar being coupled to the arm, the crossbar including an internal member, and right and left cylindrical external members,
one of the right and left cylindrical external members being rotatably provided around an outer surface of one end of the
internal member;

right and left holding devices being attached to the right and left cylindrical external members, respectively, the right
and left holding devices being configured to hold the respective workpieces; and

tilt drive devices being coupled to the right and left cylindrical external members, one of the tilt drive devices being configured
to rotate the one of the right and left cylindrical external members having one of the right and left holding devices, around
the outer surface of the one end of the internal member independently of the other of the right and left cylindrical external
members having the other of the right and left holding devices.

US Pat. No. 10,166,683

WORKPIECE CONVEYING APPARATUS FOR A PRESSING MACHINE

Aida Engineering, Ltd., ...

1. A workpiece conveying apparatus for a pressing machine, comprising:two robots each comprising:
a raising and lowering frame supported on a stationary frame so as to be movable in a Z-axis direction being an up-and-down direction, the stationary frame being mounted to extend along a Y-axis direction that is a width direction orthogonal to an X-axis direction being a workpiece conveying direction of a passage space for conveying a workpiece;
a first arm supported at a proximal end side thereof on the raising and lowering frame through a first joint so as to be freely rotatable within a horizontal plane;
a second arm supported at a proximal end side thereof on a distal end side of the first arm through a second joint so as to be freely rotatable within the horizontal plane;
a first arm driving mechanism configured to drive the first arm to rotate about the first joint with respect to the raising and lowering frame; and
a second arm driving mechanism configured to drive the second arm to rotate about the second joint with respect to the first arm;
a raising and lowering mechanism configured to enable the two robots to move in the Z-axis direction;
a cross arm configured to couple distal ends of second arms of the two robots so as to be freely rotatable within the horizontal plane through a third joint;
a workpiece holding unit removably connected to the cross arm and configured to releasably hold the workpiece through a tool holder;
a shifting device mounted to the cross arm and configured to move, by a shifting movement drive source, a drive-side shifting member linearly along a longitudinal direction of the cross arm relative to the cross arm; and
a sliding device mounted to the workpiece holding unit and configured to move, under a state in which the workpiece holding unit is connected to the cross arm, the tool holder in a Y-axis direction by an operation of causing a driven-side shifting member corresponding to the drive-side shifting member to be driven by the drive-side shifting member.

US Pat. No. 10,065,386

SLIDE MOTION CONTROL APPARATUS FOR MECHANICAL PRESS

AIDA ENGINEERING, LTD., ...

1. A slide motion control apparatus for a mechanical press comprising:a slide which is disposed so as to be relatively vertically movable with respect to a driven body to which a drive force is transmitted through a con rod of the mechanical press;
a relative position command unit that outputs a relative position command indicating a relative position of the slide with respect to the driven body;
a relative position detecting unit that detects a relative position of the slide with respect to the driven body, and outputs a relative position detecting signal indicating the detected relative position;
a servomotor;
a drive mechanism that relatively moves the slide with respect to the driven body by a drive force of the servomotor; and
a control unit configured to control the servomotor based on a relative position command signal output from the relative position command unit, and the relative position detecting signal output from the relative position detecting unit, wherein
a plurality of relative position detecting units, a plurality of servomotors, and a plurality of drive mechanisms are respectively provided,
the plurality of relative position detecting units respectively detect a plurality of relative positions of the slide with respect to the driven body and respectively output relative position detecting signals indicating the detected relative positions,
the plurality of drive mechanisms relatively move the slide with respect to the driven body by drive forces of the plurality of servomotors,
the control unit is configured to respectively control the plurality of servomotors based on the relative position command signal output from the relative position command unit, and the plurality of relative position detecting signals output from the plurality of relative position detecting units,
the slide includes a plurality of inner slides which are disposed so as to be respectively vertically movable with respect to the driven body,
the plurality of relative position detecting units respectively detect relative positions of the plurality of inner slides with respect to the driven body,
the plurality of drive mechanisms relatively move the plurality of inner slides respectively and independently,
the relative position command unit respectively outputs relative position commands indicating the relative positions of the plurality of inner slides with respect to the driven body, and
the control unit is configured to control the plurality of servomotors, respectively, based on the plurality of relative position command signals which correspond to the plurality of inner slides and are output from the relative position command unit, and the plurality of relative position detecting signals output from the plurality of relative position detecting units.

US Pat. No. 9,126,379

SERVO PRESS SYSTEM

AIDA ENGINEERING LTD., K...

1. A servo press system comprising:
a servo press configured to move a slide upward and downward by rotating a crank shaft; and
a servo transfer device configured to implement an advance motion to carry a pressed workpiece out of the servo press, and
implement a return motion to hold another pressed workpiece after the advance operation, wherein

the servo press is configured to implement a press operation using a pendulum motion of the crank shaft, a rotational direction
of the crank shaft being inverted within a motion direction inversion region while the servo transfer device implements the
advance operation,

the servo transfer device is configured to receive first transfer operation instruction information that is generated depending
on a rotation angle of the crank shaft, and second transfer operation instruction information that is generated independently
of the rotation angle of the crank shaft,

the servo press system is configured to determine whether or not the rotation angle of the crank shaft is within the motion
direction inversion region, and

the servo transfer device is configured to implement the return motion by utilizing the first transfer operation instruction
information when it has been determined that the rotation angle of the crank shaft is not within the motion direction inversion
region, and implement the advance motion by utilizing the second transfer operation instruction information when it has been
determined that the rotation angle of the crank shaft is within the motion direction inversion region.

US Pat. No. 9,339,861

BREAKAGE PREVENTION MECHANISM OF TRANSFER APPARATUS AND TRANSFER APPARATUS USING THEREOF

AIDA ENGINEERING CO., LTD...

15. A crossbar system transfer apparatus configured to carry a work in or out of a press machine, comprising:
a crossbar provided with a work holder that holds the work;
a pair of transferring members that supports the crossbar;
a connection member connected between the crossbar and one of the pair of transferring members; and
a shaft member being held by a first supporting portion in the crossbar and a second supporting portion in the connection
member, one of the first and second supporting portions being elongated and the other of the first and second supporting portions
being circular.

US Pat. No. 9,694,412

DRAWING METHOD AND SERVO PRESS SYSTEM

AIDA ENGINEERING, LTD., ...

1. A drawing method using a servo press system comprising a servo press which transmits a drive force to a slide from a servo
motor via a link mechanism, and a die cushion apparatus which supports a cushion pad, and generates a die cushion force in
the cushion pad, the method comprising:
a lowering step of lowering the slide in a course of a stroke for performing drawing;
a stopping step of stopping the slide for a first period before the slide reaches a bottom dead center in the course of the
stroke for performing drawing;

a keeping step of reducing the die cushion force to below a predetermined die cushion force and keeping the die cushion force
to below the predetermined die cushion force for a second period while the slide is stopped in the course of the stroke for
performing drawing; and

a restarting step of restarting the lowering of the slide after the die cushion force is kept to below the predetermined die
cushion force for the second period,

wherein the drawing including the lowering step, the stopping step, the keeping step, and the restarting step is performed
at least one time in the course of the stroke for performing drawing.

US Pat. No. 9,586,375

PRESS MACHINE CONTROLLER

AIDA ENGINEERING, LTD., ...

1. A press machine including an actuator capable of lowering a workpiece support unit from a press working position by a distance
corresponding to a predetermined amount or more, and raising the workpiece support unit so as to be returned to the press
working position after ejecting a workpiece, the press machine comprising:
a bottom dead center position correction control section, which performs, based on a preset target bottom dead center position
and a detected bottom dead center position obtained during a press operation, positional correction so that an actual bottom
dead center position of a slide is adjusted to the preset target bottom dead center position;

a selected bottom dead center position setting section, which sets a selected bottom dead center position selected as a position
lower than the preset target bottom dead center position; and

a bottom dead center position switching section, which switches the preset target bottom dead center position to the selected
bottom dead center position in association with a raising and lowering operation association signal of the actuator,

wherein the bottom dead center position correction control section is configured to perform, based on the selected bottom
dead center position after the switching and the detected bottom dead center position, positional correction so that the actual
bottom dead center position of the slide is adjusted to the selected bottom dead center position.

US Pat. No. 9,126,378

SERVO PRESS APPARATUS DRIVEN BY MULTIPLE MOTORS

AIDA ENGINEERING, LTD., ...

1. A servo press apparatus comprising:
a slide;
first and second crank structures coupled to the slide;
first and second gear trains interconnected with the first and second crank structures, respectively;
first and second motor shafts connected to the first and second gear trains, respectively;
first and second motor sets each including a plurality of motors, the first motor set having the same rotating axis as that
of the first motor shaft, the second motor set having the same rotating axis as that of the second motor shaft so that the
first motor shaft is driven by the first motor set and the second motor shaft is driven by the second motor set;

a first encoder coupled to the first motor shaft and configured to detect a rotation position of the first motor shaft;
a second encoder coupled to the second motor shaft and configured to detect a rotation position of the second motor shaft;
a controller configured to receive an output from one of the first and second encoders and a slide position command to calculate
a common torque command for the first and second motor sets;

a first phase adjuster configured to adjust an output signal from the first encoder;
a second phase adjuster configured to adjust an output signal from the second encoder;
first torque controllers configured to control currents for the plurality of motors of the first motor set, respectively,
based on the common torque command, the output signal from the first encoder and a phase-adjusted output signal of the output
signal from the first encoder; and

second torque controllers configured to control currents for the plurality of motors of the second motor set, respectively,
based on the common torque command, the output signal from the second encoder and a phase-adjusted output signal of the output
signal from the second encoder, wherein:

the plurality of motors of the first motor set are placed on the first motor shaft so that phases of the motors of the first
motor set are different from each other with respect to an axis of rotation in order to cancel out mutual torque pulsations
of the motors of the first motor set,

the plurality of motors of the second motor set are placed on the second motor shaft so that phases of the motors of the second
motor set are different from each other with respect to an axis of rotation in order to cancel out mutual torque pulsations
of the motors of the second motor set,

the first torque controllers control the plurality of motors of the first motor set placed on the first motor shaft with different
phases based on the phase adjusted output signal from the first phase adjuster and the output signal from the first encoder,

the second torque controllers control the plurality of motors of the second motor set placed on the second motor shaft with
different phase based on the phase adjusted output signal from the second phase adjuster and the output signal from the second
encoder,

the first crank structure, the first gear train, the first motor shaft, and the first motor set are arranged symmetrically
with the second crank structure, the second gear train, the second motor shaft, and the second motor set, respectively,

the first gear train comprises a first main gear and a first drive gear,
the second gear train comprises a second main gear and a second drive gear,
the first crank structure comprises a first eccentric ring fixed to a rotating axis of the first main gear and a first connecting
rod connected between the first eccentric ring and the slide, the first eccentric ring and the first connecting rod converting
circular motion of the first main gear into reciprocating motion of the slide,

the second crank structure comprises a second eccentric ring fixed to a rotating axis of the second main gear and a second
connecting rod connected between the second eccentric ring and the slide, the second eccentric ring and the second connecting
rod converting circular motion of the second main gear nto reciprocating motion of the slide, and

the first main gear and the second main gear directly engage with each other.

US Pat. No. 9,782,816

DIE CUSHION DEVICE

AIDA ENGINEERING, LTD., ...

1. A die cushion device comprising:
a cushion pad that supports a blank holder through a plurality of cushion pins;
a fluid-pressure cylinder configured to lift the cushion pad; and
a fluid-pressure closed circuit,
the fluid-pressure closed circuit including:
a die cushion pressure creation line connected to a die cushion pressure creation chamber of the fluid-pressure cylinder;
a system pressure line to which an accumulator is connected, the accumulator being configured to accumulate hydraulic fluid
at low system pressure for knockout operation of the cushion pad;

a pilot drive type logic valve that is provided between the die cushion pressure creation line and the system pressure line,
and that is operable as a main relief valve at a time of die cushion operation; and

a pilot relief valve that is provided between the die cushion pressure creation line and the system pressure line, and that
creates pilot pressure that acts on a pilot port of the pilot drive type logic valve to control the pilot drive type logic
valve, wherein

the hydraulic fluid is filled in the fluid-pressure closed circuit in a pressurized manner to pressurize the hydraulic fluid
in the fluid-pressure closed circuit in one cycle period of the cushion pad by using only die cushion force applied from the
cushion pad through the fluid-pressure cylinder, one cycle period of the cushion pad including the die cushion operation and
the knockout operation,

no fluid-pressure pump is provided in the fluid-pressure closed circuit for pressurizing and feeding the hydraulic fluid,
and

the die cushion device further comprises a first solenoid valve that switches pressure to act on the pilot port of the pilot
drive type logic valve to any one of the pilot pressure and the system pressure during the one cycle period of the cushion
pad.

US Pat. No. 9,643,232

SERVO PRESS LINE OPERATION METHOD AND SERVO PRESS LINE OPERATION CONTROL DEVICE

AIDA ENGINEERING, LTD., ...

1. A method for operating a servo press line in which a servo press and a servo transfer device are disposed in a workpiece
transfer direction, the method comprising:
causing a transfer controller and a press controller to receive a master signal that causes the servo transfer device to make
a motion in synchronization with the servo press, the transfer controller controlling a motor of the servo transfer device
using a motor instruction and the press controller controlling a motor of the servo press using a motor instruction;

causing the transfer controller to determine whether or not an abnormality in the master signal has occurred;
causing the transfer controller to generate the motor instruction based on a stop signal that stops the motor of the servo
transfer device, instead of the master signal, when the transfer controller has determined that an abnormality in the master
signal has occurred;

causing the transfer controller to determine whether or not the servo transfer device is moving in a direction to enter a
press area, the press area being an interference area with the servo press,

wherein the motor of the servo transfer device stops in a predetermined normal time based on a stop instruction from the master
signal,

wherein, when the transfer controller has determined that an abnormality in the master signal has occurred, the transfer controller
selects one of different types of the stop signals corresponding to a determination result as to whether or not the servo
transfer device is moving in a direction to enter the press area, and

wherein the transfer controller selects a first stop signal, which stops the motor of the servo transfer device in a predetermined
first stop time that is shorter than the predetermined normal time, when the transfer controller has determined that the servo
transfer device is moving in a direction to enter the press area.

US Pat. No. 10,124,390

DIE CUSHION DEVICE AND CONTROL METHOD OF DIE CUSHION DEVICE

AIDA Engineering, Ltd., ...

1. A die cushion device comprising:a cushion pad;
a hydraulic cylinder that moves the cushion pad up and down;
a hydraulic machine that supplies pressure liquid to a die cushion pressure generation chamber of the hydraulic cylinder;
a die cushion position detector that detects a position of the cushion pad;
a pressure detector that detects pressure in the die cushion pressure generation chamber of the hydraulic cylinder;
a first command unit that outputs a first command showing a position of the cushion pad;
a second command unit that outputs a second command showing pressure in the die cushion pressure generation chamber of the hydraulic cylinder or a physical amount in proportion to the pressure;
a position controller that controls the hydraulic machine so as to cause the position of the cushion pad to correspond to the first command, on the basis of the first command outputted from the first command unit and the position of the cushion pad detected by the die cushion position detector; and
a pressure controller that controls the hydraulic machine so as to cause the pressure in the die cushion pressure generation chamber of the hydraulic cylinder to correspond to the second command, on the basis of the second command outputted from the second command unit and the pressure detected by the pressure detector,
wherein position control by the position controller and pressure control by the pressure controller are switched during a rising process of a slide of a press machine.

US Pat. No. 9,889,494

PRESS FORMING METHOD FOR A SEMI-SOLID METAL MATERIAL AND PRESS FORMING SYSTEM FOR A SEMI-SOLID METAL MATERIAL

AIDA Engineering Co., Ltd...

1. A press forming system for a semi-solid metal material, comprising:
a semi-solid metal material manufacturing device for manufacturing a semi-solid metal material in a container having an upward
opening by injecting molten metal of a metal material into the container, and cooling the injected molten metal while electromagnetically
stirring the injected molten metal with a stirring device;

a semi-solid metal material inverting device having a robot arm to hold the container containing the semi-solid metal material,
and invert the container to place the container in a temporary storage space;

a liquid phase part discharging device including a table with an opening through which a liquid phase part is discharged from
the semi-solid metal material, the container being held by the robot arm; and

a pressing machine for pressing the semi-solid metal material by feeding, into dies, the semi-solid metal material from which
the liquid phase part is discharged, wherein

the semi-solid metal material inverting device is configured to:
place the table on an upper end side of the container containing the semi-solid metal material in the semi-solid metal material
manufacturing device; and

invert the container together with the table and place the inverted container in the temporary storage space through the table,
placing the semi-solid metal material on the table, and

when the container is inverted, the opening of the table allows the liquid phase part of the semi-solid metal material to
be discharged from the container.

US Pat. No. 9,707,612

DIE CUSHION FORCE CONTROL METHOD AND DIE CUSHION DEVICE

AIDA ENGINEERING, LTD., ...

1. A die cushion force control method of driving a servo motor according to a die cushion force command previously set to
generate die cushion force on a cushion pad, the method comprising:
a step of outputting a die cushion position command indicating a predetermined die cushion waiting position at which a die
cushion force action starts, and controlling a die cushion position based on the die cushion position command to allow the
cushion pad to wait in the die cushion waiting position; and

a preliminary pressurization step of outputting the die cushion force command before a slide of a press machine reaches the
die cushion waiting position, controlling a die cushion force based on the die cushion force command, allowing the cushion
pad to move upward from the die cushion waiting position, allowing the slide to move toward the cushion pad with the cushion
pad at a position above the die cushion waiting position, and preliminary applying pressure to the cushion pad until the slide
reaches the die cushion waiting position.

US Pat. No. 10,179,357

BENDING APPARATUS AND BENDING METHOD FOR A PLATE-SHAPED METAL WORKPIECE

AIDA ENGINEERING, LTD., ...

1. A bending apparatus for bending an unbent plate-shaped quadrilateral metal workpiece, comprising:a support for supporting two edges of the workpiece;
suction devices configured to suck a surface of the workpiece;
actuators, each actuator configured to move one of the suction devices mounted thereon so as to pull a portion of the workpiece being sucked by the one of the suction devices away from an original position of the portion of the workpiece; and
an apparatus base on which each of the actuators is mounted in a pivotable manner with respect to a moving direction of a respective one of the suction devices mounted on the each of the actuators.

US Pat. No. 9,853,509

COMPOSITE TORQUE ROTATING ELECTRIC MACHINE

AIDA ENGINEERING, LTD., ...

1. A composite torque rotating electric machine comprising:
a stator in which armature windings are arranged at plural teeth in the circumferential direction at regular intervals;
a rotor, arranged inside the stator, with permanent magnets in a cylindrical iron core obtained by laminating magnetic steel
sheets; and

magnetic flux blocking units provided in the circumferential direction on an outer periphery of the rotor to block closed
loop magnetic flux generated around the stator windings,

wherein the magnetic flux blocking units comprise plural non-magnetic body portions between adjacent permanent magnets positioned
on the outer periphery side of the rotor and each formed in an elongated shape stretching in a radial direction of the rotor,
the non-magnetic body portions are arranged such that they expand from the outer periphery side of the rotor to the inner
periphery side and are shortened in radial length in order from a d-axis toward a q-axis, the non-magnetic body portion nearest
to the d-axis is parallel to the q-axis, and the non-magnetic body portion nearest to the q-axis is parallel to the d-axis.

US Pat. No. 9,806,571

COMPOSITE TORQUE ROTATING ELECTRIC MACHINE

AIDA ENGINEERING, LTD., ...

1. A composite torque rotating electric machine comprising:
a stator in which armature windings are arranged at plural areas in the circumferential direction at regular intervals;
a rotor that is configured using a cylindrical iron core obtained by laminating magnetic steel sheets;
plural first permanent magnets that are provided on d-axes and that are arranged in the circumferential direction on the outer
periphery of the rotor;

plural second permanent magnets that are provided on the d-axes and that are arranged on the inner periphery side of the rotor
to face the first permanent magnets on the outer periphery side;

third permanent magnets that are provided on q-axes and that are stretched longitudinally in the radial direction in the rotor;
and

air gap portions that are provided at a middle position between the plural first permanent magnets along the circumferential
direction on the outer periphery side of the third permanent magnets, wherein

the distances in the radial direction between the first permanent magnets and the second permanent magnets are larger than
the distances in the circumferential direction between the first permanent magnets and the air gap portions, and rectifying
units configured using plural slits are provided between the first permanent magnets and the air gap portions,

a slit nearest the first permanent magnet has a greatest length of the plural slits, and
only one second permanent magnet is provided between two adjacent third permanent magnets.

US Pat. No. 9,511,410

WORK TRANSFER APPARATUS WITH CROSSBARS AND REDUCTION GEARS

AIDA ENGINEERING, LTD., ...

1. A work transfer apparatus comprising:
an arm configured to transfer workpieces to be pressed to a press machine or to carry pressed workpieces out of the press
machine;

first and second crossbars coupled to the arm, the first crossbar being positioned opposite to the second crossbar relative
to the arm;

a first holding member, attached to the first crossbar, configured to hold a workpiece;
a second holding member, attached to the second crossbar, configured to hold another workpiece;
a first motor provided to the arm and coupled to the first crossbar, wherein the first motor rotates the first crossbar around
an axis of the first crossbar;

a second motor provided to the arm and coupled to the second crossbar, wherein the second motor rotates the second crossbar
around an axis of the second crossbar;

a first reduction gear provided between the first motor and the first crossbar, wherein a rotative power of the first motor
is transmitted to the first crossbar through the first reduction gear, and

a second reduction gear provided between the second motor and the second crossbar, wherein a rotative power of the second
motor is transmitted to the second crossbar through the second reduction gear, wherein

the rotative power of the first motor is not transmitted to the second crossbar and the rotative power of the second motor
is not transmitted to the first crossbar.

US Pat. No. 9,993,866

PRESS FORMING APPARATUS AND PRESS FORMING METHOD FOR A SEMI-SOLID METAL MATERIAL

AIDA ENGINEERING, LTD., ...

1. A press forming apparatus for a semi-solid metal material, comprising:a slide caused to make a reciprocating linear motion by a mechanism configured to convert a rotary motion of a power source into the reciprocating linear motion;
a subsidiary slide mounted so as to be movable relative to the slide in a reciprocating moving direction of the slide;
a fluid pressure mechanism interposed between the slide and the subsidiary slide, the fluid pressure mechanism moving the subsidiary slide relative to the slide by fluid pressure;
an upper die mounted to the subsidiary slide; and
a lower die,
the press forming apparatus being configured to press-form the semi-solid metal material while applying predetermined pressure to the semi-solid metal material for a predetermined time period by bringing, along with descent action of the slide, the upper die into contact with the semi-solid metal material fed into the lower die, then stopping the slide at a predetermined position, and moving the upper die mounted to the subsidiary slide relative to the slide by the fluid pressure mechanism under a state in which the slide is stopped,
wherein until the slide is stopped at the predetermined position after bringing, along with the descent action of the slide, the upper die mounted to the subsidiary slide into contact with the semi-solid metal material fed into the lower die, and while the slide performs the descent action, pressure applied to the semi-solid metal material is controlled to the predetermined pressure by moving the upper die mounted to the subsidiary slide upward relative to the slide by the fluid pressure mechanism.

US Pat. No. 10,052,678

WORKPIECE CONVEYING APPARATUS FOR A PRESSING MACHINE

AIDA ENGINEERING, LTD., ...

1. A workpiece conveying apparatus for conveying a workpiece in a conveying direction to a pressing machine, comprising:a rotary base rotatable about a first axis extending substantially perpendicular to the conveying direction;
a first arm having a proximal end that is pivotally supported by the rotary base so as to be rockable within a first plane two-dimensionally extending substantially along the first axis and a first direction substantially perpendicular to the conveying direction and the first axis;
a coupler pivotally supported on a distal end of the first arm so as to be rockable within a second plane substantially parallel to the first plane;
a second arm having a proximal end that is mounted to the coupler so as to be rockable within a third plane intersecting with the second plane;
a cross bar mounted to a distal end of the second arm so as to be rockable within a fourth plane substantially parallel to the third plane; and
a workpiece holding device mounted to the cross bar for holding the workpiece, wherein
the first axis extends through a coupling portion between the rotary base and the first arm from a top to a bottom of the workpiece conveying apparatus,
the rotary base, the first arm, and the second arm being arranged from the top to the bottom of the workpiece conveying apparatus in that order along the first axis, and
the second arm has a distal end positioned at a side opposite to the proximal end mounted to the coupler, relative to the first axis.

US Pat. No. 10,226,808

DIE CUSHION DEVICE OF PRESS MACHINE

Aida Engineering, Ltd., ...

1. A die cushion device of a press machine comprising:a plurality of cushion pads;
a plurality of die cushion force generators that supports the plurality of respective cushion pads, and that is capable of independently moving up and down the plurality of respective cushion pads as well as independently generating die cushion force for each of the cushion pads; and
a die cushion controller that controls the plurality of die cushion force generators to independently move up and down the plurality of respective cushion pads as well as to independently generate die cushion force for each of the cushion pads,
wherein the plurality of cushion pads has a common die cushion stroke,
wherein the die cushion controller includes only one die cushion controller to control the plurality of respective cushion pads as one cushion pad,
wherein the die cushion device further comprises a plurality of cushion pad position detectors that detects cushion pad positions of the plurality of respective cushion pads,
wherein the die cushion controller includes a die cushion position controller that includes a die cushion position commanding device that outputs a common die cushion position command, and a plurality of position control compensators that controls the plurality of respective die cushion force generators to independently move up and down each of the plurality of cushion pads, on the basis of the common die cushion position command outputted from the die cushion position commanding device, and cushion pad positions detected by the plurality of respective cushion pad position detectors,
wherein two or more of the die cushion force generators are arranged for each of the plurality of cushion pads,
wherein the plurality of cushion pad position detectors corresponding to the plurality of respective die cushion force generators is provided to detect each of positions of two or more of the die cushion force generators, arranged for each of the plurality of cushion pads, or detect a die cushion position near each of the positions, and
wherein the plurality of position control compensators corresponding to the plurality of respective die cushion force generators is provided to control the plurality of respective die cushion force generators to independently move up and down each of the plurality of cushion pads, on the basis of the common die cushion position command outputted from the die cushion position commanding device, and a die cushion position detected by a corresponding cushion pad position detector in the plurality of cushion pad position detectors.