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公开(公告)号：US12023723B2
公开(公告)日：2024-07-02
申请号：US17553418
申请日：2021-12-16
Applicant: AIDA ENGINEERING, LTD.
Inventor： Tadahiro Kondo
Abstract: The die cushion device according to the present invention includes a first hydraulic cylinder and a second hydraulic cylinder that are independently and simultaneously controlled. When a cushion pad is pre-pressurized, pressure control is performed on the first hydraulic cylinder via a first hydraulic circuit so that a pressure in a lower chamber of the first hydraulic cylinder is pre-pressurized to a preset pressure, and position control is simultaneously performed on the second hydraulic cylinder via a second hydraulic circuit so that the cushion pad is held in the die cushion standby position. A force with which the first hydraulic cylinder moves the cushion pad upward is balanced with a force with which the second hydraulic cylinder moves the cushion pad downward (a force for holding the die cushion standby position).
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公开(公告)号：US10603709B2
公开(公告)日：2020-03-31
申请号：US15727863
申请日：2017-10-09
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Tadahiro Kondo
Abstract: There is provided a die cushion device that includes a cushion pad, a hydraulic cylinder configured to lift the cushion pad, and a hydraulic closed circuit connected to a die cushion pressure creation chamber of the hydraulic cylinder. The hydraulic closed circuit includes a pilot drive type logic valve that is operable as a main relief valve at the time of the die cushion operation, and a pilot relief valve configured to create pilot pressure for controlling the logic valve. Hydraulic oil is filled in the hydraulic closed circuit, in a pressurized manner, and the hydraulic oil in the hydraulic closed circuit is pressurized by only die cushion force applied from the cushion pad through the hydraulic cylinder, in one cycle period of the cushion pad.
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公开(公告)号：US10441988B2
公开(公告)日：2019-10-15
申请号：US14962808
申请日：2015-12-08
Applicant: AIDA ENGINEERING, LTD.
Inventor： Tadahiro Kondo , Junji Makabe
Abstract: 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.
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公开(公告)号：US09808848B2
公开(公告)日：2017-11-07
申请号：US14162377
申请日：2014-01-23
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Tadahiro Kondo , Ryosho Iwamura
Abstract: According to the die cushion apparatus of a press machine and the die cushion controlling method of the present invention, in holding the cushion pad on standby at a desired standby position, it is possible to hold the cushion pad on standby in parallel with the lower faces of the dies mounted to the slide, and if the lower faces of the dies are inclined, it is possible to hold the cushion pad on standby in the state of being inclined. Through this configuration, it is possible to easily allow the material to come into contact with the lower faces of the dies from the beginning of the die cushion force control (beginning of the collision), and also possible to smoothen the die cushion action in the plane, thereby enhancing the formability.
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公开(公告)号：US09694412B2
公开(公告)日：2017-07-04
申请号：US14204609
申请日：2014-03-11
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Tadahiro Kondo , Ryosho Iwamura
Abstract: The present invention provides a servo press system and a drawing method using the servo press system. The drawing method according to the aspect of the present invention includes: a stopping step of stopping the slide for a first period in a course of a 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 for a second period within the first period for which the slide is stopped; and a restarting step of restarting the slide after keeping the die cushion force for the second period, wherein drawing including 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.
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Patent Agency Ranking
公开(公告)号：US20220193748A1
公开(公告)日：2022-06-23
申请号：US17553418
申请日：2021-12-16
Applicant: AIDA ENGINEERING, LTD.
Inventor： Tadahiro Kondo
Abstract: The die cushion device according to the present invention includes a first hydraulic cylinder and a second hydraulic cylinder that are independently and simultaneously controlled. When a cushion pad is pre-pressurized, pressure control is performed on the first hydraulic cylinder via a first hydraulic circuit so that a pressure in a lower chamber of the first hydraulic cylinder is pre-pressurized to a preset pressure, and position control is simultaneously performed on the second hydraulic cylinder via a second hydraulic circuit so that the cushion pad is held in the die cushion standby position. A force with which the first hydraulic cylinder moves the cushion pad upward is balanced with a force with which the second hydraulic cylinder moves the cushion pad downward (a force for holding the die cushion standby position).
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公开(公告)号：US09782816B2
公开(公告)日：2017-10-10
申请号：US14704469
申请日：2015-05-05
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Tadahiro Kondo
CPC classification number: B21D24/14 , B21D24/02 , F15B1/024 , F15B21/005 , F15B2211/212 , F15B2211/88
Abstract: There is provided a die cushion device that includes a cushion pad, a hydraulic cylinder configured to lift the cushion pad, and a hydraulic closed circuit connected to a die cushion pressure creation chamber of the hydraulic cylinder. The hydraulic closed circuit includes a pilot drive type logic valve that is operable as a main relief valve at the time of the die cushion operation, and a pilot relief valve configured to create pilot pressure for controlling the logic valve. Hydraulic oil is filled in the hydraulic closed circuit, in a pressurized manner, and the hydraulic oil in the hydraulic closed circuit is pressurized by only die cushion force applied from the cushion pad through the hydraulic cylinder, in one cycle period of the cushion pad.
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公开(公告)号：US12172403B2
公开(公告)日：2024-12-24
申请号：US17559895
申请日：2021-12-22
Applicant: AIDA ENGINEERING, LTD.
Inventor： Tadahiro Kondo
Abstract: The die cushion device includes a first hydraulic cylinder for supporting a cushion pad, and a first hydraulic circuit for driving the first hydraulic cylinder. The first hydraulic circuit is a hydraulic closed circuit including a logic valve connected between a die cushion pressure generation line and a system pressure line, and a hydraulic pump driven by a first servomotor for applying a pilot pressure to the logic valve. The first controller controls the first servomotor (pilot pressure) based on a first pressure command corresponding to the die cushion force and the pressure detected by the first pressure detector to control the pressure in a lower chamber of the first hydraulic cylinder so that the pressure is equal to a pressure corresponding to the first pressure command.
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公开(公告)号：US10363594B2
公开(公告)日：2019-07-30
申请号：US15368315
申请日：2016-12-02
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Tadahiro Kondo , Ryosho Iwamura
Abstract: According to the die cushion apparatus of a press machine and the die cushion controlling method of the present invention, in holding the cushion pad on standby at a desired standby position, it is possible to hold the cushion pad on standby in parallel with the lower faces of the dies mounted to the slide, and if the lower faces of the dies are inclined, it is possible to hold the cushion pad on standby in the state of being inclined. Through this configuration, it is possible to easily allow the material to come into contact with the lower faces of the dies from the beginning of the die cushion force control (beginning of the collision), and also possible to smoothen the die cushion action in the plane, thereby enhancing the formability.
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公开(公告)号：US09501052B2
公开(公告)日：2016-11-22
申请号：US14249964
申请日：2014-04-10
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Tadahiro Kondo , Kazufumi Tsuchida , Minoru Somukawa
CPC classification number: G05B19/041 , B21D24/02
Abstract: A die cushion force control method and a die cushion apparatus generates a die cushion force on a cushion pad based on a die cushion force command value set in advance. A die cushion force command value equal to or larger than a target die cushion force command value is outputted initially 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 a die cushion force command value decreased continuously (gradually) so as to be smaller than the target die cushion force command value is outputted, and subsequently a die cushion force command value increasing gradually so as to be equal to the target die cushion force command value is outputted.
Abstract translation: 模具缓冲力控制方法和模具缓冲装置基于预先设定的模具缓冲力指令值，在缓冲垫上产生模具缓冲力。 初始地输出等于或大于目标模具缓冲力指令值的模具缓冲力指令值，以便当构造为逐步的目标模具缓冲力指令值用作模具缓冲垫时，抑制产生的初始模具缓冲力过冲 力指令值，则模具缓冲力指令值连续（逐渐地）减小到小于目标模具缓冲力指令值，并且随后模具缓冲力指令值逐渐增加以使其等于目标 输出缓冲力指令值。
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