公开(公告)号：US3823591A

公开(公告)日：1974-07-16

申请号：US30461572

申请日：1972-11-08

Applicant: LEIFELD & CO

Inventor： SCHRODER P ,  POLLKOTTER G

IPC: B21D22/14 ,  B21D22/16 ,  B21D53/26 ,  B21D22/18

CPC classification number: B21D22/16 ,  B21D53/26 ,  Y10T29/49504

Abstract: A method and apparatus are disclosed for forming dish-shaped articles from a circular blank by spinning operations. Spinning rollers having large radius shoulders are guided by template control means along a first path to spin the blank to form a curved intermediate shape at a first high speed operation. The intermediate shape is then subjected to a draw spin operation with a smaller radius shoulder guided by a second template control means along a second path distinct from the first path. The speed of operation for the second path is controlled to uniform deformation energy for the second run.

Abstract translation: 公开了一种通过旋转操作从圆形坯料形成碟形制品的方法和装置。 具有大半径肩部的旋转辊由模板控制装置沿着第一路径引导以旋转坯料以在第一高速操作下形成弯曲的中间形状。 然后对中间形状进行拉伸旋转操作，其中较小的半径的肩部沿着与第一路径不同的第二路径由第二模板控制装置引导。 将第二路径的操作速度控制为均匀的第二次运行的变形能量。

公开(公告)号：US3779060A

公开(公告)日：1973-12-18

申请号：US3779060D

申请日：1971-09-16

Applicant: LEIFELD & CO

Inventor： SCHRODER P

IPC: B21D53/30 ,  B21D22/18

CPC classification number: B21D53/30 ,  Y10T29/49531

Abstract: A method and apparatus for manufacturing a stepped rim from a cylindrical ring is provided. The ring is bent outwardly at one end to form a clinch and the opposite end of the ring is indented to form a locking ring groove.

Abstract translation: 提供了一种用于从圆柱形环制造阶梯式边缘的方法和装置。 环在一端向外弯曲以形成钳口，并且环的相对端缩进以形成锁定环槽。