Patents Assigned to Aida Engineering Ltd.
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Patent number: 10441988Abstract: An apparatus for checking an inclination of a cushion pad includes: a plurality of height position detectors that detect a plurality of respective height positions in a vertical direction at a plurality of positions different in a horizontal direction of the cushion pad; an inclination measurement unit that measures information on an inclination of the cushion pad in accordance with the plurality of height positions detected by the plurality of respective height position detectors; and an input/output unit that outputs the information on an inclination of the cushion pad measured by the inclination measurement unit to a display or a printer in a visible manner.Type: GrantFiled: December 8, 2015Date of Patent: October 15, 2019Assignee: Aida Engineering, Ltd.Inventors: Tadahiro Kondo, Junji Makabe
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Patent number: 10286438Abstract: A die cushion-cum-slide cushion device selectively opens and closes a flow channel between a hydraulic pump/motor driven by a servo motor, and hydraulic cylinders that generate slide cushion force, or a flow channel between the hydraulic pump/motor, and hydraulic cylinders that generate die cushion force, by switching a selector valve. Before applying the slide cushion force is started, the servo motor is controlled to allow the hydraulic cylinders to generate required slide cushion force through a check valve. While the slide cushion force is applied, hydraulic circuits, each of which includes a logic valve, control pressure of the hydraulic cylinders, and hydraulic circuits, each of which includes the servo motor, control die cushion pressure of the hydraulic cylinders.Type: GrantFiled: July 6, 2016Date of Patent: May 14, 2019Assignee: AIDA Engineering, Ltd.Inventor: Yasuyuki Kohno
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Patent number: 10259031Abstract: A die cushion device of a press machine includes: 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.Type: GrantFiled: May 18, 2016Date of Patent: April 16, 2019Assignee: Aida Engineering, Ltd.Inventor: Yasuyuki Kohno
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Patent number: 10166683Abstract: A workpiece conveying apparatus includes: two SCARA robots each including a first arm supported on a raising and lowering frame through intermediation of a first joint, a second arm supported through intermediation of a second joint, a first arm driving mechanism configured to drive the first arm to rotate, and a second arm driving mechanism configured to drive the second arm to rotate; a raising and lowering mechanism for the two SCARA robots; a cross arm configured to couple distal ends of the second arms; a workpiece holding unit configured to releasably hold the workpiece; shifting devices provided to the cross arm and configured to shift a drive-side shifting member; and sliding devices provided to the workpiece holding unit and configured to shift the tool holder by an operation of causing the driven-side shifting member to be driven by the drive-side shifting member.Type: GrantFiled: March 10, 2017Date of Patent: January 1, 2019Assignee: Aida Engineering, Ltd.Inventor: Keisuke Takeda
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Patent number: 10160175Abstract: There is provided a press machine which can apply a large compression force to a mold as well as impart smooth vibration only in a rectilinear advancing direction to the mold, and thereby can improve the press-formability. A main slide and a sub-slide constitute a slide and at the same time a cylinder-piston mechanism. During press-forming, a compression force is transmitted to the sub-slide (an upper mold) through hydraulic pressure applied interlockingly with driving of the main slide, and the sub-slide is vibrated with the hydraulic pressure being periodically changed. Favorable press-forming can be performed even under relatively difficult press-forming conditions, by controlling the vibration such that a vibration frequency of the sub-slide (the upper mold) becomes 9 Hz or higher but 33.3 Hz or lower and a vibration amplitude of the sub-slide becomes 0.05 mm or larger but 0.5 mm or smaller.Type: GrantFiled: January 28, 2014Date of Patent: December 25, 2018Assignee: Aida Engineering, Ltd.Inventors: Yasuyuki Kohno, Ryosho Iwamura, Tadahiro Kondo
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Patent number: 10124390Abstract: There are provided position controllers each of which controls a position of a cushion pad by controlling a hydraulic machine that supplies pressure oil to a die cushion pressure generation chamber of a hydraulic cylinder, and pressure controllers each of which controls pressure in the die cushion pressure generation chamber of the hydraulic cylinder, and in particular, during a rising process of a slide of a press machine, position control by the position controller and pressure control by the pressure controller are switched to enable press forming also during the rising process.Type: GrantFiled: September 15, 2015Date of Patent: November 13, 2018Assignee: AIDA Engineering, Ltd.Inventor: Yasuyuki Kohno
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Patent number: 9088193Abstract: A motor control device which can determine a magnetic pole position for a magnetic pole position detector included in a permanent magnet motor in which the reluctance torque proportion is larger than the magnet torque proportion is provided. In a permanent magnet synchronous motor having multi-phase windings of N axes (N?2), the windings of optionally selected K axes (K?N) are DC excited using corresponding independent power supplies.Type: GrantFiled: July 11, 2013Date of Patent: July 21, 2015Assignees: Aida Engineering, Ltd., Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Yoshihiro Yamaguchi, Hiroshi Nagase, Fumio Tajima, Masataka Yahara, Yukinari Fujisawa
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Patent number: 9021946Abstract: Provided is a press machine for driving a slide by a motor, including a control device for controlling driving of the motor, in which the press machine has a press capacity which can be variably controlled by using field control for the motor.Type: GrantFiled: September 16, 2010Date of Patent: May 5, 2015Assignee: Aida Engineering, Ltd.Inventors: Hiroshi Nagase, Yasuhiko Tanaka, Kenji Suzuki, Hiroaki Yoshida
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Patent number: 9020630Abstract: A servo transfer press system generates a press phase signal and a transfer phase signal that are synchronized with a master phase signal, performs a press operation according to a reference press motion based on the press phase signal, and performs a transfer operation according to a reference transfer motion based on the transfer phase signal. The servo transfer press system includes a reference interference diagram generation section, a reference interference diagram storage section, an operation interference diagram generation section, an interference presence/absence comparison-determination section, and a phase signal relative relationship adjustment section, and performs a transfer press operation while avoiding interference by performing an automatic phase signal adjustment when a motion has been changed.Type: GrantFiled: October 26, 2012Date of Patent: April 28, 2015Assignee: Aida Engineering, Ltd.Inventors: Sotoyuki Kaneko, Osamu Yahata
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Patent number: 8915348Abstract: A breakage prevention mechanism includes a pair of arms which is synchronized and moves approximately parallel, and a crossbar bridged between the top end of the arms. Both end of the crossbar and the arm are connected pivotably around two axis. Both end of the crossbar are configured to be slidable against the arm in X axis direction. A plunger is placed between both end of the crossbar and arm, which protects the crossbar by restraining the pivoting and the sliding of both in the normal condition and releasing the restraint when the unintended force is given.Type: GrantFiled: March 18, 2011Date of Patent: December 23, 2014Assignee: Aida Engineering, Ltd.Inventors: Keisuke Takeda, Seiji Nakoshi, Takashi Koshimizu
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Patent number: 8915181Abstract: In a mechanical press, the pressure (cylinder force) of a hydraulic pressure chamber of a cylinder-piston mechanism provided in a slide of the mechanical press can be variably controlled with a high responsiveness by a hydraulic pump/motor driven by an electric servomotor, in response to a cylinder force command corresponding to the press load command. Accordingly, even if a die height value is set to a value small enough to cause an overload, the press load can be restricted before the occurrence of the overload, and this can save the trouble of strictly adjusting the die height value. Further, pressure-application time in the vicinity of a bottom dead center can be lengthened, and a breakthrough phenomenon can be suppressed from occurring at the end of pressure application. Still further, because the overload does not occur, pressure oil is not relieved, so that the interruption of a press operation is avoided.Type: GrantFiled: October 19, 2011Date of Patent: December 23, 2014Assignee: Aida Engineering, Ltd.Inventors: Yasuyuki Kohno, Tadahiro Kondo, Junji Makabe, Akira Yamanouchi
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Patent number: 8896260Abstract: A power supply unit for a press machine having a converter (converter circuit) connected to a commercial AC power supply, and an inverter (inverter circuit) connected to a press motor, includes an electrical energy bank, an inrush prevention circuit, an inrush prevention instruction signal generation section, and a contactor switch section, wherein contactors of the inrush prevention circuit are switched from on ON state to an OFF state and inrush prevention resistors of the inrush prevention circuit are connected to AC phase current paths on condition that the inrush prevention instruction signal generation section has generated and output an inrush prevention instruction signal (Sres) during press operation.Type: GrantFiled: December 4, 2012Date of Patent: November 25, 2014Assignee: Aida Engineering, Ltd.Inventor: Kazuhiro Kuboe
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Patent number: 8857326Abstract: An electric servo press machine is configured to convert a rotation of an electric servomotor into a reciprocating linear motion of a slide to perform press working on a workpiece. The machine includes a clutch mechanism interposed in a power transmission path between the servomotor and the slide, and a brake mechanism for applying a brake onto the slide under a disconnected state in which the servomotor and the power transmission path are decoupled from each other by the clutch mechanism. The machine brings the clutch mechanism into the disconnected state and applies the brake onto the slide upon an immediate stop request, and recovers from immediate stop under a state in which a phase shift between the servomotor and the power transmission path ranging from the clutch mechanism in the disconnected state to the slide is eliminated under a connected state of the clutch mechanism.Type: GrantFiled: November 9, 2012Date of Patent: October 14, 2014Assignee: Aida Engineering, Ltd.Inventor: Takashi Koshimizu
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Patent number: 8770566Abstract: A removably supporting mechanism is provided for a workpiece holding device that can hold and release a workpiece. The workpiece holding device is removably supported on a crossbar extending substantially orthogonal to a workpiece conveying direction of a press machine. The removably supporting mechanism has a guide pin and a guide pin hole. The guide pin is fittable into and engageable with the guide pin hole. One of the guide pin and the guide pin hole is disposed on the workpiece holding device side, whereas another of the guide pin and the guide pin hole is disposed on the crossbar side. The guide pin and the guide pin hole can perform alignment of the workpiece holding device and the crossbar in a direction substantially orthogonal to an inserting direction of the guide pin.Type: GrantFiled: June 22, 2012Date of Patent: July 8, 2014Assignee: Aida Engineering, Ltd.Inventor: Keisuke Takeda
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Patent number: 8757056Abstract: A die cushion device for a press machine includes: a hydraulic cylinder for supporting a cushion pad and generating a die cushion pressure when a slide of the press machine moves downward; a proportional valve and a hydraulic pump/motor connected in parallel between a lower chamber of the hydraulic cylinder and a low-pressure source; an electric motor connected to a rotating shaft of the hydraulic pump/motor; a die cushion pressure command issuer for outputting a predetermined die cushion pressure command; a pressure detector for detecting a pressure in the lower chamber of the hydraulic cylinder; and a controller for controlling an aperture of the proportional valve and a torque of the electric motor in a manner that the die cushion pressure becomes equal to a pressure corresponding to the die cushion pressure command, based on the die cushion pressure command and the pressure detected by the pressure detector.Type: GrantFiled: November 9, 2009Date of Patent: June 24, 2014Assignee: Aida Engineering, Ltd.Inventor: Yasuyuki Kohno
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Patent number: 8726802Abstract: A controller for an electric servo press includes: a press load sensor for detecting a pressure force of the slide; a pressure-force determination device for determining whether the pressure force of the slide reaches one or a plurality of different pressure-force setting values based on the one or the plurality of different pressure-force setting values and an output signal of the press load sensor, and for generating a pressure-force achievement signal each time the pressure force of the slide reaches each of the one or the plurality of different pressure-force setting values; a servo motor drive controller for controlling driving of the servo motor; and a motion command device. In response to the pressure-force achievement signal, switching of a drive control mode by the servo motor drive controller is switched, and/or a motion to be commanded by the motion command device is switched.Type: GrantFiled: December 6, 2010Date of Patent: May 20, 2014Assignee: Aida Engineering, Ltd.Inventors: Masaki Senda, Hiroaki Yoshida, Akira Harada, Koichi Hishinuma, Hirokazu Kawabuchi, Hideyuki Matsuda, Yasuhiro Harada, Kazuki Honjo
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Patent number: 8720328Abstract: A control system of a servo press and a control method are provided for preventing an overload on a pressure capability of a press and a torque capability of a drive system. A control device of a servo press for pressing by transferring a drive force of a servomotor to a slide via a drive mechanism includes: a motion calculation unit for calculating slide target position data; a torque calculation unit for calculating process torque for pressing and control torque for speed change of the servo motor on the basis of slide target position data; a process system limit unit for limiting the calculated process torque to predetermined process limitation torque; and a drive system limit unit for limiting combined torque of the limited process torque and the control torque to predetermined drive limitation torque. The servo motor is driven on the basis of a command of drive limitation torque.Type: GrantFiled: November 4, 2011Date of Patent: May 13, 2014Assignee: AIDA Engineering, Ltd.Inventor: Kazuhiro Kuboe
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Patent number: 8628130Abstract: Provided is a workpiece transfer apparatus for a press machine including: a workpiece retaining device which is supported by a crossbar extending to be approximately orthogonal to a workpiece transfer direction, and is capable of retaining and releasing a workpiece; a guiding device which supports and guides the workpiece retaining device so that the workpiece retaining device is slidable along a longitudinal direction of the crossbar; a driving device which drives the workpiece retaining device supported and guided by the guiding device so that the workpiece retaining device is moved along the longitudinal direction of the crossbar; and a brake device which acts in a path different from a path of the driving device, the brake device being capable of fixing and releasing a position of the workpiece retaining device with respect to the longitudinal direction of the crossbar.Type: GrantFiled: April 14, 2011Date of Patent: January 14, 2014Assignee: Aida Engineering, Ltd.Inventor: Keisuke Takeda
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Patent number: 8519659Abstract: Provided is a low-cost control device for an electric servo press, which is excellent in operability and operation efficiency, capable of abruptly stopping a servomotor in a safe and reliable manner within a short time period in response to an abrupt stop command while avoiding hard actuation of a mechanical brake, even in the case of runaway of the servomotor or the like. An electric servo press performs switching to rotation stop control for a servomotor according to an abrupt stop motion based on an abrupt stop command signal to perform brake actuation to cause a mechanical brake to actually start braking and to forcibly interrupt rotational drive power to the servomotor at a scheduled stop time at which the servomotor is stopped according to the abrupt stop motion.Type: GrantFiled: February 8, 2008Date of Patent: August 27, 2013Assignee: Aida Engineering, Ltd.Inventor: Atsushi Someya
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Patent number: 8429811Abstract: A tandem press system includes a plurality of presses disposed in a workpiece transfer direction, a workpiece transfer device that transfers a workpiece from an upstream press to a downstream press using a tool mounted on the workpiece transfer device via a crossbar, and a tool replacement device that replaces the tool mounted on the workpiece transfer device. The tool replacement device can be transferred from an inter-press space between the upstream press and the downstream press to an external space in a tool replacement direction independently of transfer of a bolster provided with a die to an external space in a die replacement direction.Type: GrantFiled: December 13, 2010Date of Patent: April 30, 2013Assignee: AIDA Engineering, Ltd.Inventor: Kenichi Endo