-
1.发明公开公开(公告)号：US20230173567A1
公开(公告)日：2023-06-08
申请号：US17603954
申请日：2021-07-23
发明人： Shijian Yuan , Wei Liu
CPC分类号： B21D37/10 , B21D22/22 , B21D22/205 , B21D37/16 , B21D51/44
摘要： Disclosed are an apparatus and a method for deep drawing of large-sized thin-wall curved surface parts with servo reverse bulging, which pertain to the technical field of drawing of a thin-wall curved surface part. The apparatus includes a forming die, a jacking unit, and a power unit, wherein the forming die includes an upper die, a lower die, and a blank holder. The upper die and the blank holder are connected to a press machine, the blank holder is disposed above the lower die, and a blank to be drawn is placed between the lower die and the blank holder; the jacking unit is disposed inside the lower die and adapted to move along a moving direction of the upper die, enabling the blank to be drawn to deform by with reverse bulging. The method can inhibit defects of wrinkling and cracking in drawing processes effectively.
-
公开(公告)号：US20190240716A1
公开(公告)日：2019-08-08
申请号：US16234371
申请日：2018-12-27
申请人： Shijian Yuan
发明人： Shijian Yuan
摘要： A frozen forming method for a large-size thin-walled aluminum alloy component using an aluminum alloy tailor-welded plate is described. An aluminum alloy tailor-welded plate is cooled to a temperature with a cryogenic fluid medium, and temperature of a weld zone is regulated to be lower than that of a base metal zone; and the component is fabricated by a tool integrally with aluminum alloy tailor-welded plate, by placing aluminum alloy tailor-welded plate onto tool; assembling tool and filling with cryogenic fluid medium so temperature of tool is −150 to −196 degrees Celsius; and apply pressure to deform the aluminum alloy tailor-welded plate when temperature of a weld zone reaches −150 degrees Celsius to −196 degrees Celsius, thereby facilitating forming the aluminum alloy tailor-welded plate to a designed shape of the aluminum alloy component; and disassembling the tool, and taking out the aluminum alloy component.
-
公开(公告)号：US20180043413A1
公开(公告)日：2018-02-15
申请号：US15646353
申请日：2017-07-11
申请人： UACJ Corporation
发明人： Yoichi UENO , Yutaka YAMADA
IPC分类号： B21D22/02
摘要： A press-forming die (1) includes a die (2) having a die corner (21), which follows along an inward-facing corner (41) of a blank sheet (4), and a punch (3) having a punch corner (31). A corner groove (6) extends along a portion of the punch corner at which leading surfaces (33) and a side surface (34) intersect in a relative stroke direction (X) of the punch. The corner groove is shaped such that its groove width (W) decreases in the stroke direction and converges at a punch corner center (C1). A shoulder radius (Rps) of punch shoulders (3S), which are portions along which the corner groove and the leading surfaces intersect with the side surface, a sheet thickness (t) of the blank sheet (4), and a flange length (Ls) at both ends of the inward-facing corner preferably satisfy the relationship t≦Rps≦Ls.
-
公开(公告)号：US09878362B2
公开(公告)日：2018-01-30
申请号：US14418049
申请日：2012-12-19
发明人： Tohru Yoshida
摘要： A press-forming tool comprising: a punch including a punch portion and a plate portion transferring shape to a blank material; a die paired with the punch and opposes the punch portion; a wrinkle suppression mold including a first surface opposing the plate portion and comes into contact with the plate portion at a press-forming ending point, a second surface opposing the die and holds the blank material along with the die, and a third surface continued between the first and second surface and opposes the punch portion, and disposed between the third surface and the punch portion via a gap; a pressure receiving portion including a groove portion on the first surface of the wrinkle suppression mold; and a wrinkle suppression force increasing portion disposed on a surface opposing the first surface of the plate portion, protrudes toward the pressure receiving portion, and generates a reaction force opposed to a pressing direction when pressed in the pressing direction in end-phase of a press-forming.
-
公开(公告)号：US09724745B2
公开(公告)日：2017-08-08
申请号：US13392418
申请日：2009-12-24
摘要： A press forming process forms a blank, which is the material to be pressed, into a product having a predetermined shape including a continuous hat-shaped section in the longitudinal direction and a curved portion protruding toward the top surface side in the longitudinal direction. In the press forming process, an intermediate product which has an excess thickness portion formed at a part of the curved portion of the product and protruding higher than the top surface of the product is formed while constraining the portion of the intermediate product other than the excess thickness portion until the excess thickness portion projects in a direction opposite to the protrusion direction thereof, whereby the intermediate product is formed into a predetermined shape.
-
公开(公告)号：US09718499B2
公开(公告)日：2017-08-01
申请号：US14758671
申请日：2013-12-20
发明人： Yasuharu Tanaka , Toshimitsu Aso , Takashi Miyagi , Misao Ogawa , Kazuyuki Kawano , Kazunori Oooka , Shinobu Yamamoto
IPC分类号： B62D25/04 , B62D65/00 , B21J5/02 , B21K7/12 , B21D22/20 , B21D22/22 , B21D22/26 , B21D53/88 , B21D24/04 , B21D5/04
CPC分类号： B62D25/04 , B21D5/045 , B21D22/20 , B21D22/22 , B21D22/26 , B21D24/04 , B21D53/88 , B21J5/02 , B21K7/12 , B62D65/00 , Y10T29/49623 , Y10T428/1241
摘要： The top plate section of the metal stock is pressed and clamped against a punch by a pad, a portion that will be at the outside of the L shaped curve is pressed and camped against a die by a blank holder, a bender is moved, and a vertical wall portion at the inside of the L shaped curved of the metal stock sheet and the flange portion joined to the vertical wall at the inside of the L shaped curve are molded. The metal stock sheet is moved in the direction toward the blank holder while the metal stock sheet being pressed and clamped, and a vertical wall portion at the outside of the L shaped curve of the L shaped hat shaped cross-section and the flange portion joined to the vertical wall at the outside of the L shaped curve are molded.
-
公开(公告)号：US20170203352A1
公开(公告)日：2017-07-20
申请号：US15400072
申请日：2017-01-06
发明人： Peter Zhang , Vic Kong , Jeffrey Dai
摘要： A method to form a product from a work-piece in a press is provided. The press includes a top tooling and a bottom tooling and a clamping device. The method comprises pressing the work-piece at a first stage of a top tooling movement in the bottom tooling; and clamping and pressing the work-piece at a second stage of the top tooling movement in the bottom tooling.
-
公开(公告)号：US09676020B2
公开(公告)日：2017-06-13
申请号：US14451036
申请日：2014-08-04
申请人： Cheng-Ping Wang
发明人： Cheng-Ping Wang
CPC分类号： B21D28/16 , B21D22/22 , B21D28/14 , Y10T83/9425
摘要： A fine blanking device characterized by a trough structure is provided. Preferably, the fine blanking device comprises a punch, a mother die module having a first die cavity allowing the punch to enter therein, and a blank-holder module having a second die cavity allowing the punch to enter therein; wherein one or more trough structures are formed on/individually formed on the mother die module or/and the blank-holder module, wherein the trough structure is formed, surrounding the first die cavity, on the mother die module at a sheet stock contacting side thereof; or/and the trough structure is formed, surrounding the second die cavity, on the blank-holder module at a sheet stock contacting side thereof.
-
公开(公告)号：US20170080472A1
公开(公告)日：2017-03-23
申请号：US15368315
申请日：2016-12-02
发明人： Yasuyuki KOHNO , Tadahiro KONDO , Ryosho IWAMURA
摘要： 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：US09550222B2
公开(公告)日：2017-01-24
申请号：US13623894
申请日：2012-09-21
摘要： A domer station having a domer assembly, a housing assembly, and a stacked piston assembly is provided. The domer assembly is movably disposed within a domer body passage located in the housing assembly and structured to move between a forward, first position and a retracted, second position. The stacked piston assembly includes a plurality of pistons, preferably three pistons, disposed in series and a pressure supply. The pistons are disposed behind the domer in pressure chambers. The pistons have a constant pressure applied thereto and are biased towards the domer. The pistons are, however, each restrained by a stop and do not contact, or operatively engage, the domer when the domer is in the domer first position.
摘要翻译： 提供了一种具有支架组件，壳体组件和堆叠式活塞组件的三脚架。 所述突起组件可移动地设置在位于所述壳体组件中的所述主体通道内并被构造成在前进，第一位置和缩回的第二位置之间移动。 堆叠的活塞组件包括多个活塞，优选地三个活塞，串联设置和一个压力供应。 活塞在压力室中设置在拱顶之后。 活塞具有施加到其上的恒定压力并且朝向顶杆偏置。 然而，当三角星座处于第一位置时，活塞每个都被挡块限制，并且不接触或操作地接合该三角架。
-
-
-
-
-
-
-
-
-
搜索结果
382 条记录 (耗时 0.027 秒)
