发明授权
- 专利标题: Method and apparatus for manufacturing a stabilizer bar
- 专利标题(中): 用于制造稳定杆的方法和装置
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申请号: US934446申请日: 1992-10-05
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公开(公告)号: US5491996A公开(公告)日: 1996-02-20
- 发明人: Goran Baarman , Bengt Willberg
- 申请人: Goran Baarman , Bengt Willberg
- 申请人地址: FIX Imatra
- 专利权人: Imatra Steel OY AB
- 当前专利权人: Imatra Steel OY AB
- 当前专利权人地址: FIX Imatra
- 优先权: FIX901113 19900305
- 主分类号: B21D7/025
- IPC分类号: B21D7/025 ; B21D7/16 ; B21D53/88 ; B60G17/015 ; B60G21/055
摘要:
A stabilizer bar or a similar metallic tube product for vehicles, has a central portion and at least two bent portions forming legs. The bar includes a thick-walled metallic tube having in the central portion a wall thickness and outside diameter in a ratio amounting to at least 1/10. This tube has an outside wall portion bent with a restricted thinning, ranging from about 5 to 15%. The bent portions are bent with an average bending radius of curvature in the range from about 1.4 to 2.1 times the outside diameter of the tube. Apparatus and methods can manufacture stabilizer bars or similar tubular metallic products of the foregoing type. For example, a method includes the steps of fitting to a bending arm one end of the thick-walled metallic tube. An inside wall portion of the tube has a radial spacing from a bending center of curvature, no greater than the length of the bending arm. The tube and the heating zone move relatively, with the heating zone advancing along the tube. Circular movement of the bending arm is resisted with a force sufficient to displace the flexure plane (separating compression zone from tension zone) radially outward from the center of curvature and to thin the outside wall of the metallic tube by about 5 to 15%. Resistance of the circular movement can be preformed with a gear and gear rack.
公开/授权文献
- US4773229A Method for refrigeration systems 公开/授权日:1988-09-27