公开(公告)号：US11761504B2

公开(公告)日：2023-09-19

申请号：US17551619

申请日：2021-12-15

Applicant: Strömholmen AB

Inventor： Fredrik Göransson ,  Thomas Bergqvist

IPC: F16F9/02 ,  B21D24/02 ,  F16F9/32 ,  F16F9/36 ,  F16F9/58

CPC classification number: F16F9/0218 ,  B21D24/02 ,  F16F9/0281 ,  F16F9/3214 ,  F16F9/3242 ,  F16F9/362 ,  F16F9/58 ,  F16F9/0236 ,  F16F2230/007 ,  F16F2230/0023 ,  F16F2230/24 ,  F16F2230/30

Abstract: A piston cylinder device (1) comprising a cylinder (2) with a first and a second end and a guide (6), such that a pressure chamber (8) is formed in the cylinder. A piston (12) is moveable in the pressure chamber (8). The guide (6) is fixedly secured to the cylinder (2) by a lock ring (7). A sealing means (9) is arranged to seal between the guide (6) and an inner wall of a tubular wall (3) of the cylinder (2) to prevent fluid leakage from the pressure chamber (8) to the surroundings. The piston cylinder device (1) is provided with a material weakening zone (13) arranged in the inner wall of the tubular wall (3) of the cylinder (2) axially between the lock ring (7) and the second end (20) of the cylinder (2), the material weakening zone (13) being arranged to be deformed or sheared against the lock ring (7) at a predetermined level of impact of the piston (12) against the guide (6). A leakage gap (14) is arranged to interrupt the sealing means (9) upon deformation or shearing of the material weakening zone (13) such that gas from the pressure chamber (8) is allowed to leave the pressure chamber (8) through said leakage gap (14) to the surroundings.

公开(公告)号：US11701700B2

公开(公告)日：2023-07-18

申请号：US17410120

申请日：2021-08-24

Applicant: Barnes Group Inc.

Inventor： Ethan McLaughlin ,  Richard Miller ,  Steven Reilly ,  Michael Culbertson ,  Russ Sasak

IPC: B21D24/14 ,  B21D24/02

CPC classification number: B21D24/14 ,  B21D24/02

Abstract: A controllable force cushion device that can be programmed to provide a variable and/or pulsating force that can be used in any application where force control is desirable. The frequency of the pulsation can be adjusted to suit different applications and/or circumstances (e.g., forming of sheet metals in die applications, etc.). The cushion can comprise one or more manifolds containing hydraulic cylinders that can be compressed during operation pushing fluid through a proportional relief valve that can be controlled by a motion control device, thereby creating a desired force. Material (e.g., sheet metal, etc.) flow can be controlled by using a gap control method. In use, the variable pulsating, gap control, auto-learning press cushion device of the present invention can optionally be mounted to the underside of a press bolster and can be used in conjunction with a stamping press.

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

IPC: B21D24/02 ,  B30B15/24 ,  B21D24/14

CPC classification number: B21D24/02 ,  B21D24/14 ,  B30B15/24

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.

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

IPC: B21D43/05 ,  B21D22/20 ,  B21D24/02 ,  B21D24/00

CPC classification number: B21D43/05 ,  B21D22/20 ,  B21D24/00 ,  B21D24/02

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.

公开(公告)号：US20160354828A1

公开(公告)日：2016-12-08

申请号：US15158049

申请日：2016-05-18

Applicant: AIDA ENGINEERING, LTD.

Inventor： Yasuyuki KOHNO

IPC: B21D24/14 ,  B30B15/02 ,  F16F15/027 ,  B21D24/02

CPC classification number: B21D24/14 ,  B21D24/02 ,  B21D24/10 ,  B30B15/026 ,  F16F15/0275

Abstract: 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.

Abstract translation: 冲压机的模具缓冲装置包括：多个缓冲垫; 多个模具缓冲力产生器，其支撑多个相应的缓冲垫，并且能够独立地上下移动多个相应的缓冲垫，并且独立地为每个缓冲垫独立地产生模具缓冲力; 以及模具缓冲控制器，其控制所述多个模具缓冲力发生器，以独立地上下移动所述多个缓冲垫，以及独立地为每个所述缓冲垫产生模具缓冲力。

公开(公告)号：US20160339500A1

公开(公告)日：2016-11-24

申请号：US15228778

申请日：2016-08-04

Applicant: Hyundai Motor Company

Inventor： Ju Young KIM

IPC: B21D24/08 ,  B21D24/14 ,  B30B15/06 ,  B21D24/02

CPC classification number: B21D24/08 ,  B21D24/02 ,  B21D24/14 ,  B30B15/061

Abstract: A cushion pin device for a press having a cushion pad in which a blank holder is seated on the top thereof outside a lower mold, and locks a blank holder to an upper mold while pressurizing an edge of a molded panel, includes: a cushion support disposed below the cushion pad, a cushion cylinder connected with a lower part of the cushion pad to move up or down the cushion pad from the cushion support, a linear scale mounted between the cushion pad and the cushion support to measure the position of the cushion pad, a main pressure control unit that keeps internal pressure of each cushion cylinder similarly, and a sub pressure control unit that is interconnected with the main pressure control unit so as to control the locking position of the cushion pad when each cushion cylinder operates.

公开(公告)号：US09481021B2

公开(公告)日：2016-11-01

申请号：US14001343

申请日：2012-02-24

Applicant: Tohru Yoshida ,  Daisuke Toyoda

Inventor： Tohru Yoshida ,  Daisuke Toyoda

IPC: B21D22/02 ,  B21D24/06 ,  B21D24/02 ,  B21D24/12 ,  B21D22/22 ,  F16F1/32

CPC classification number: B21D22/02 ,  B21D22/22 ,  B21D24/02 ,  B21D24/06 ,  B21D24/12 ,  F16F1/32

Abstract: A load-applying device of a press-forming die includes a rod which includes a first end, a second end, and a flange, a lamination coned disc spring in which a plurality of coned disc springs having a center hole, to which the first end of the rod is inserted, are laminated, a first plate which includes a first through hole to which the first end of the rod is inserted and abuts the lamination coned disc spring, a second plate which includes a second through hole to which the second end of the rod is inserted and abuts the flange; and a gap fixing member which is detachably provided between the first plate and the second plate and fixes a gap between the first plate and the second plate so as to maintain the gap by which the lamination coned disc spring biases the flange to the second plate. The second end and the first plate relatively move in a mutually approaching direction during press-forming, and the lamination coned disc spring is compressed.

Abstract translation: 压制成型模具的载荷施加装置包括：杆，其包括第一端，第二端和凸缘;层压碟形弹簧，其中具有中心孔的多个碟形弹簧，第一 杆的端部被插入，层压，第一板，其包括第一通孔，杆的第一端插入到该第一通孔中，并邻接层压碟形弹簧;第二板，其包括第二通孔，第二通孔与第二通孔相连， 杆的端部插入并邻接凸缘; 以及间隙固定构件，其可拆卸地设置在所述第一板和所述第二板之间，并且固定所述第一板和所述第二板之间的间隙，以便保持所述间隔，所述层压圆锥形弹簧将所述凸缘偏压到所述第二板。 在压制成形期间，第二端和第一板相互接近的方向相对移动，并且压片盘簧被压缩。

公开(公告)号：US09393607B2

公开(公告)日：2016-07-19

申请号：US13874022

申请日：2013-04-30

Applicant: GREENLEE TEXTRON INC.

Inventor： William F. Nordlin

IPC: B21D28/34 ,  B26F1/38 ,  B21D28/24 ,  B26F1/14

CPC classification number: B26F1/14 ,  B21D24/02 ,  B21D28/24 ,  B21D28/34 ,  B26F1/386 ,  Y10T83/9425 ,  Y10T83/9428 ,  Y10T83/9437

Abstract: An assembly includes a die and a punch which cut a hole in a workpiece. The die has a base wall having outer and inner surfaces and a passageway extending therethrough, and a wall extending from the base wall. The inner surface of the base wall has at least one portion which is angled relative to a central axis of the die. The punch includes a body having a bore therethrough, a leading edge on the body which is capable of piercing and cutting a workpiece, and cutting edges on the body for cutting a hole in the workpiece. The leading edge has inclined surfaces between the bore and the piercing points which engage with the portion of the inner surface of the die.

Abstract translation: 组件包括模具和切割工件中的孔的冲头。 模具具有底壁，其具有外表面和内表面以及从其延伸的通道，以及从底壁延伸的壁。 底壁的内表面具有至少一个相对于模具的中心轴线成角度的部分。 冲头包括具有穿过其中的孔的主体，能够刺穿和切割工件的主体上的前缘以及用于切割工件中的孔的主体上的切割边缘。 前缘在孔与穿刺点之间具有与模具的内表面部分接合的倾斜表面。

公开(公告)号：US09358602B2

公开(公告)日：2016-06-07

申请号：US13877105

申请日：2011-09-30

Applicant: Junya Naitou ,  Keisuke Okita ,  Shushi Ikeda

Inventor： Junya Naitou ,  Keisuke Okita ,  Shushi Ikeda

IPC: B21D22/20 ,  B21D37/16 ,  B21D22/22 ,  B21D24/04 ,  B21D24/02

CPC classification number: B21D37/16 ,  B21D22/022 ,  B21D22/20 ,  B21D22/208 ,  B21D22/22 ,  B21D24/02 ,  B21D24/04

Abstract: There is provided a useful method for producing a press-formed product without making the structure of a press tool complicated, which product has favorable formability in a level so as to be able to be produced by deep drawing, and which product is produced by press-forming a thin steel sheet with a punch and a die, in which the thin steel sheet is heated to a temperature not lower than an Ac3 transformation point thereof, and the press-forming is then started, wherein the forming is carried out so that a temperature difference in the thin steel sheet is adjusted to be not higher than 200° C. at a stage when the thin steel sheet has reached one third of a forming height.

Abstract translation: 提供了一种用于生产压制成型产品的有用方法，而不会使压制工具的结构复杂化，该产品具有良好的成形性，能够通过深冲制造而产生，并且哪种产品通过压制 形成具有冲头和模具的薄钢板，其中将薄钢板加热至不低于其Ac3相变点的温度，然后开始压制成形，其中成形是这样进行的： 在薄钢板达到成形高度的三分之一的阶段，将薄钢板的温差调节为不高于200℃。

公开(公告)号：US09346095B2

公开(公告)日：2016-05-24

申请号：US14039698

申请日：2013-09-27

Applicant: Siemens Aktiengesellschaft

Inventor： Frank Knoche ,  Johannes Kurz ,  Oleg Schlegel ,  Stephan Schäufele

IPC: B21D22/00 ,  B21D24/02 ,  B21D24/14

CPC classification number: B21D24/02 ,  B21D24/14

Abstract: A die cushion drive includes a first pump, operated by a first electrical machine and at least one hydraulic cylinder having first and second chambers, with the first chamber in fluid communication with the first pump. A die cushion mechanically connected to the hydraulic cylinder. During a controlled movement of the die cushion, a pressure regulation and a preliminary control are active, with a second pump being coupled to a second electrical machine. During preliminary control, the second electrical machine is operated as a generator, with a first valve being used as an adjustment element of the pressure regulation.

Abstract translation: 模具缓冲驱动器包括由第一电机操作的第一泵和具有第一和第二室的至少一个液压缸，其中第一室与第一泵流体连通。 机械连接到液压缸的模座。 在模具缓冲器的可控运动期间，压力调节和初步控制是有效的，其中第二泵耦合到第二电机。 在初步控制期间，第二电机作为发电机运行，第一阀被用作调压元件。