发明名称 ROTARY SWAGING METHOD FOR HOLLOW PISTON FOR BRAKE
摘要 <p>PURPOSE:To efficiently obtain the hollow piston without necessity of cutting work, by supporting a previously formed cup type blank with the rotatable holder, and by forming the groove for the boot using two or more rolling dies.</p>
申请公布号 JPS5395156(A) 申请公布日期 1978.08.19
申请号 JP19770009241 申请日期 1977.02.01
申请人 发明人
分类号 B21H1/18;B21H1/22;F16D65/18;F16D65/22 主分类号 B21H1/18
代理机构 代理人
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