发明授权
- 专利标题： Method for forming ultra high-strength buckable rivets
- 专利标题（中）： 用于形成超高强度可食用兔子的方法
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申请号： US3626531D申请日： 1969-05-29
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公开(公告)号： US3626531A公开(公告)日： 1971-12-14
- 发明人: MAZER MARSHALL R , OLLIS RAYMOND JR
- 申请人： STANDARD PRESSED STEEL CO
- 专利权人： Standard Pressed Steel Co
- 当前专利权人： Standard Pressed Steel Co
- 优先权： DE2157885 1971-11-22; FR7142819 1971-11-30; US82895669 1969-05-29
- 主分类号： B21J15/02
- IPC分类号： B21J15/02 ; B21K1/58 ; B23G9/00
摘要：
A METHOD OF FORMING AN ULTRA HIGH-STRENGTH BUCKABLE BOLT, SUCH AS A RIVET, WHEREIN AN INITIALLY UNIFORMLY SOFT RIVET BLANK IS SELECTIVELY COLD WORKED TO SELECTIVELY WORK HARDEN A PORTION OF THE RIVET BLANK WHILE MAINTAINING ANOTHER PORTION OF THE BLANK IN THE INITIALLY SOFT CONDITION. AFTER HEAT TREATING, THE BLANK IS MACHINED TO THE FINAL RIVET SHAPE WITH THE SOFTER PORTION BEING RETAINED AS THE RIVET TAIL SO THAT IT CAN BE READILY UPSET, AS BY BUCKING OR SQUEEZING, WITHOUT CRACKING WHEN THE RIVET IS INSTALLED.