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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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Patent Agency Ranking
公开(公告)号：US11618230B2
公开(公告)日：2023-04-04
申请号：US16931250
申请日：2020-07-16
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Ryosho Iwamura
Abstract: The press machine includes: a hydraulic cylinder configured to drive a slide; a plurality of hydraulic pumps/motors; a first port of each of which is connected to a first pressurizing chamber of the hydraulic cylinder; a plurality of servomotors axially connected to rotating shafts of the respective hydraulic pumps/motors respectively; a low-pressure accumulator to which second ports of the hydraulic pumps/motors are each connected; a high-pressure accumulator connected to a second pressurizing chamber of the hydraulic cylinder; and a slide position controller configured to control the servomotors so that a position of the slide matches a position corresponding to a slide position command signal based on the slide position command signal from a slide position commander and a slide position signal from a slide position detector.
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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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公开(公告)号：US20210060887A1
公开(公告)日：2021-03-04
申请号：US16931250
申请日：2020-07-16
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Ryosho Iwamura
Abstract: The press machine includes: a hydraulic cylinder configured to drive a slide; a plurality of hydraulic pumps/motors; a first port of each of which is connected to a first pressurizing chamber of the hydraulic cylinder; a plurality of servomotors axially connected to rotating shafts of the respective hydraulic pumps/motors respectively; a low-pressure accumulator to which second ports of the hydraulic pumps/motors are each connected; a high-pressure accumulator connected to a second pressurizing chamber of the hydraulic cylinder; and a slide position controller configured to control the servomotors so that a position of the slide matches a position corresponding to a slide position command signal based on the slide position command signal from a slide position commander and a slide position signal from a slide position detector.
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公开(公告)号：US10160175B2
公开(公告)日：2018-12-25
申请号：US14166441
申请日：2014-01-28
Applicant: AIDA ENGINEERING, LTD.
Inventor： Yasuyuki Kohno , Ryosho Iwamura , Tadahiro Kondo
Abstract: 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.
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