发明公开
EP0589598A1 Method of making a tubular body having a deformable internal skirt
失效
一种用于制造具有可变形的唇缘的内部的管状主体的过程。
- 专利标题： Method of making a tubular body having a deformable internal skirt
- 专利标题（中）： 一种用于制造具有可变形的唇缘的内部的管状主体的过程。
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申请号： EP93307156.5申请日： 1993-09-10
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公开(公告)号： EP0589598A1公开(公告)日： 1994-03-30
- 发明人: Denham, Keith
- 申请人： AVDEL TEXTRON LIMITED
- 申请人地址： Mundells Welwyn Garden City Hertfordshire AL7 1EZ GB
- 专利权人： AVDEL TEXTRON LIMITED
- 当前专利权人： AVDEL TEXTRON LIMITED
- 当前专利权人地址： Mundells Welwyn Garden City Hertfordshire AL7 1EZ GB
- 代理机构： Treacher, Alan Leslie
- 优先权： GB9220042 19920922
- 主分类号： B21K1/60
- IPC分类号： B21K1/60 ; B21K21/08
摘要：
A tubular body (74, 102) having a deformable internal annular skirt is made from a blank (10, 80) having a stopped bore (20) which terminates at an end wall (24). First, an aperture (40) is formed in the end wall (24) to provided a through bore, of which a main region is provided by the formerly stopped bore (20). The aperture (40) is made to taper towards the main region and to a diameter substantially smaller than that of the main region. Material peripherally of the aperture (40) is then swaged towards and into the main region, and radially outwardly in the main region, thereby forming the swaged material into a skirt. The tapering aperture (40) can be formed by use of a punch (30) and a die (32) having a die aperture (36) larger than the punch diameter. By making the aperture (40) not radially symmetrical, the resulting skirt (70, 98) can be made of unequal lengths on opposite radii. The aperture (114) can be made non-symmetrical by using a punch slightly offset from the axis of the die aperture (36) or by making the end wall of different thickness on different radii.
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