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公开(公告)号：US4355529A
公开(公告)日：1982-10-26
申请号：US84034
申请日：1979-10-11
摘要： An apparatus is provided for manufacturing a cylindrical member utilizing a pair of dies each of which has a semi-cylindrical recess formed therein and which are adapted to be brought into abutment against each other to form a material disposed within the recesses into a cylindrical form. The abutting surfaces of the pair of dies are offset from a plane which includes the axis of a cylindrical member to be formed within the recesses of the dies and which is perpendicular to the direction of movement of one or both of the dies. In this manner, the formation of a bulge or flash on the outer periphery of the cylindrical member can be prevented which may be formed if the abutting surfaces lie in said plane.
摘要翻译： 提供了一种利用一对模具来制造圆柱形构件的装置，每一个模具都具有形成在其中的半圆柱形凹部，并且适于彼此抵接以形成设置在凹槽内的材料为圆柱形。 一对模具的邻接表面偏离包括要形成在模具的凹部内并垂直于一个或两个模具的移动方向的圆柱形构件的轴线的平面。 以这种方式，可以防止在圆柱形构件的外周上形成凸起或闪光，如果邻接表面位于所述平面中，则可以形成凸起或闪光。
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公开(公告)号：US4309890A
公开(公告)日：1982-01-12
申请号：US84033
申请日：1979-10-11
申请人： Shigeo Ichikawa , Satoru Nomichi , Masaki Sinoda
发明人： Shigeo Ichikawa , Satoru Nomichi , Masaki Sinoda
CPC分类号： B21D51/10 , B21D53/10 , Y10T29/49673
摘要： A strip material is subjected to an end bending step, and subsequently the bent ends of the strip material, namely, those portions of the strip material which are located adjacent to its abutting ends, are pre-coined to increase the accuracy in the region of the abutting ends, followed by a conventional U-bending and a final coining step, thereby producing a cylindrical material. The use of the pre-coining step for the abutting ends improves the circularity of the cylindrical member.
摘要翻译： 条带材料经受端部弯曲步骤，随后条带材料的弯曲端部，即位于其邻接端附近的条带材料的那些部分被预先制造，以提高在 邻接端部，然后是常规的U形弯曲和最终的压印步骤，从而产生圆柱形材料。 使用用于邻接端部的预压印步骤改善了圆柱形构件的圆形度。
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