发明名称 |
METHOD OF FABRICATING A COMPOUND PART BEING SECURE AGAINST ROTATION AND INSERT EJECTION BY PRESSING AN INSERT INTO A SHEET METAL AND INSERTS USABLE THEREFORE |
摘要 |
<p>A process for inserting an insert element into a flat sheet metal piece to form a connected element includes the steps of providing the insert element with a head and a shank. A concentric annular groove forms a constriction between the head and the shank. A plurality of separate projections are circumferentially arranged on a seating surface of the head and provide a twisting resistance between the insert element and the sheet metal piece. Each separate projection has a length that extends approximately radially relative to a longitudinal axis of the insert element. The sheet metal piece is provided with a perforation for receiving the shank. The perforation has an edge that forms a collar that projects out from a plane defined by a surface of the sheet metal piece. The shank is inserted through the perforation, and is pressed toward the sheet metal piece to cause the collar to be bent in a direction toward the plane so that the collar is essentially level with the surface of the sheet metal piece in a region between adjacent projections. The pressing causes the seating surface to firmly rest against the surface of the sheet metal piece, and causes a reduction in the perforation diameter so that the collar fills the annular groove, and so that only the projections enter the sheet metal piece in an axial direction.</p> |
申请公布号 |
EP0667936(B1) |
申请公布日期 |
1997.04.23 |
申请号 |
EP19930915638 |
申请日期 |
1993.07.07 |
申请人 |
RICHARD BERGNER GMBH & CO |
发明人 |
SCHNEIDER, WILHELM |
分类号 |
B23P19/06;F16B37/06;(IPC1-7):F16B37/06 |
主分类号 |
B23P19/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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