公开(公告)号：US4698995A

公开(公告)日：1987-10-13

申请号：US868259

申请日：1986-05-28

Applicant: Frederick R. Chorneau

Inventor： Frederick R. Chorneau

IPC: B21D11/02 ,  B21D25/02

CPC classification number: B21D11/02 ,  B21D25/02

Abstract: Jaws (20) and (23) on a stretch former (10) hold a metal sheet while the tension cylinders (18) and (19) stretch the metal sheet into its "yield state." In one embodiment, a bulldozer platen (33) carries a female die (32) into and out of forming contact with the metal sheet wrapped over a male die (31) carried between jaws (20) and (23). Bulldozer cylinders (35), (36), (38), and (39) are mounted in lightly spaced-apart relation to provide access to the metal forming parts of former (10). In another embodiment, a cantilever mounted transverse bulldozer beam (40) carries a female die (32). Beam (40) includes a retractable cylinder rod (46) which assists in moving die (32) into forming engagement with die (31) and, between reciprocations, can be retracted to permit unobstructed access to the metal forming interior of the machine.

Abstract translation: 拉伸成形器（10）上的夹爪（20）和（23）保持金属片，同时拉伸筒（18）和（19）将金属片拉伸到其“屈服状态”。 在一个实施例中，推土机压板（33）将阴模（32）承载在与夹在颚（20）和（23）之间的阳模上的金属片成形接触。 推土机气缸（35），（36），（38）和（39）以轻微间隔的关系安装，以提供通向前者（10）的金属成形部件的通路。 在另一个实施例中，悬臂安装的横向推土机梁（40）承载阴模（32）。 梁（40）包括可伸缩的气缸杆（46），其有助于将模具（32）移动成与模具（31）形成接合，并且在往复运动之间可以缩回以允许不受阻碍地进入机器的金属成形内部。

公开(公告)号：US4644626A

公开(公告)日：1987-02-24

申请号：US768577

申请日：1985-08-23

Applicant: Anthony J. Barnes ,  Russell J. Stracey

Inventor： Anthony J. Barnes ,  Russell J. Stracey

IPC: B21D22/20 ,  B21D24/00 ,  B21D25/02 ,  B21D26/055 ,  B23D17/00 ,  B21D22/10

CPC classification number: B21D26/055 ,  B21D25/02 ,  Y10T29/49805

Abstract: Metal articles are shaped by contacting a metal blank with a diaphragm of plastically deformable metal which may be superplastic aluminium and urging the diaphragm against the blank and against a mould so that the diaphragm and body are deformed. The mould may be male or female. Thin metal articles of complex shape may be made easily and cheaply.

Abstract translation: 金属制品通过使金属坯料与塑性变形金属的膜片接触而成形，该膜片可以是超塑性铝，并且将隔膜推靠在坯件上并抵靠模具，使得隔膜和主体变形。 模具可以是男性或女性。 复杂形状的薄金属制品可以容易且便宜地制成。

公开(公告)号：US4501135A

公开(公告)日：1985-02-26

申请号：US347305

申请日：1982-02-09

Applicant: David E. Chivens ,  Laramie J. Cloward

Inventor： David E. Chivens ,  Laramie J. Cloward

IPC: B21D25/02 ,  B21C51/00

CPC classification number: B21D25/02

Abstract: A system for sensing tensile stress in a metal sheet being stretch formed between gripping jaws in a stretch press. Reaction force of the stressed sheet causes elastic deformation of each jaw, and this deformation is detected by movement of a light beam emitted from a source secured to the jaw. A photosensor output signal related to light-beam movement is correlated with a second signal representing sheet strain or elongation to detect when the sheet has been tensioned to the yield point.

Abstract translation: 一种用于感测金属片材中的拉伸应力的系统，其在拉伸压机中在夹爪之间拉伸形成。 应力片的反作用力引起每个颚的弹性变形，并且通过从固定到颚的源发射的光束的移动来检测该变形。 与光束移动相关的光电传感器输出信号与表示片材应变或伸长率的第二信号相关联，以检测片材已经被张紧到屈服点的时间。

公开(公告)号：US3948071A

公开(公告)日：1976-04-06

申请号：US564677

申请日：1975-04-03

Applicant: Robert L. Lieberman ,  Dale H. De Mott

Inventor： Robert L. Lieberman ,  Dale H. De Mott

IPC: B21D25/02 ,  B21D11/04

CPC classification number: B21D25/02

Abstract: A stretch-forming machine in which a work piece is clamped at either end to hydraulic tensioning actuators, the actuators being pivotally supported at the ends of control arms that move the actuators through predetermined arcuate paths relative to a stretch die. The movement of the control arms wraps the work piece around the die while the actuators adjust for differences in the path of the work piece ends and the arcuate path of the control arms. The actuators stress the work piece to maintain it under controlled tension. The actuators are controlled as a function of arm position by cables extending between the center of the die and the pivotal supports of the actuators on the control arms. The cables wrap around the surface of the die as the control arms swing through their arcs. Linear transducers generate output signals that correspond to any changes in length of the cables between the die and the pivot points on the control arms due to the movement of the control arms relative to the die. Control means for the actuators is operated in response to the output of the transducers to control the tension in the work piece.

Abstract translation: 一种拉伸成形机，其中工件在任一端被夹紧到液压张紧致动器，致动器枢转地支撑在控制臂的端部，使致动器相对于拉伸模具移动预定的弧形路径。 控制臂的运动将工件包围在模具周围，同时致动器调节工件端部的路径和控制臂的弧形路径的差异。 执行器对工件施加压力，使其保持在受控的张力下。 通过在模具的中心和控制臂上的致动器的枢转支撑件之间延伸的电缆将致动器控制为臂位置的函数。 当控制臂摆动通过它们的弧时，电缆围绕模具的表面。 线性换能器产生输出信号，其对应于由于控制臂相对于管芯的移动而在管芯与控制臂上的枢转点之间的电缆长度的任何变化。 用于致动器的控制装置响应于换能器的输出而被操作以控制工件中的张力。

公开(公告)号：US3908428A

公开(公告)日：1975-09-30

申请号：US43466174

申请日：1974-01-18

Applicant: MACKENZIE ROBERT A

Inventor： MACKENZIE ROBERT A

IPC: B21D25/02 ,  B21D11/04

CPC classification number: B21D25/02

Abstract: A stretch bending or dieing mechanism including a drawing die press having a work tensioning or stretching apparatus at opposite ends of a lower horizontally oriented stationary die. Prior to or in timed relation with the movement of the movable die to form the sheet having its opposite ends secured in sheet clamping units of the apparatus, fluid pressure actuated motors which support the sheet clamping units are actuated to lower the units and wrap the sheet partly around the lower die. Simultaneously the units are moved in a predetermined path away from the lower die to tension or stretch the sheet, as desired, preferably by cam means which may be stationary or adjustable. Movement of the sheet clamping units in the directions away from the lower die is resisted by the tension in the work sheet during the forming operation. At other times the positions of the units relative to the die may be controlled by cam means and/or double acting reciprocating type fluid pressure actuated motors.

Abstract translation: 一种拉伸弯曲或压模机构，包括具有在下水平定向固定模具的相对端处的作业张紧或拉伸装置的拉伸模压机。 在与可移动模具的移动或与其相对的端部固定在设备的片夹紧单元中的片材之间或与之相关的时间关系中，驱动支撑片材夹紧单元的流体压力驱动的马达，以降低单元并包裹片材 部分围绕下模。 同时，单元沿着预定的路径移动离开下模，以根据需要优选地通过可以是静止的或可调节的凸轮装置张紧或拉伸片材。

公开(公告)号：US3461699A

公开(公告)日：1969-08-19

申请号：US3461699D

申请日：1967-05-23

Applicant: CONTINENTAL CAN CO

Inventor： ROTH DONALD J

IPC: B21D26/06 ,  B21D25/02 ,  B21D22/10 ,  B21J5/04

CPC classification number: B21D26/06

公开(公告)号：US3365921A

公开(公告)日：1968-01-30

申请号：US47984965

申请日：1965-08-16

Applicant: CYRIL BATH CO

Inventor： DOLNEY STANLEY M

IPC: B21D25/02

CPC classification number: B21D25/02

公开(公告)号：US3224241A

公开(公告)日：1965-12-21

申请号：US34801164

申请日：1964-02-28

Applicant: CYRIL BATH CO

Inventor： DOLNEY STANLEY M

IPC: B21D25/02

CPC classification number: B21D25/02

公开(公告)号：US2961028A

公开(公告)日：1960-11-22

申请号：US1558860

申请日：1960-03-17

Applicant: BATH CYRIL JOHN

Inventor： BATH CYRIL JOHN

IPC: B21D25/02

CPC classification number: B21D25/02

公开(公告)号：US2765020A

公开(公告)日：1956-10-02

申请号：US33702053

申请日：1953-02-16

Applicant: WHIRLPOOL SEEGER CORP

Inventor： SCARLETT JOHN A

IPC: B21D25/02

CPC classification number: B21D25/02