专利名称：SEAMLESS STEEL TUBE FOR DRIVE SHAFT AND METHOD OF MANUFACTURING THEsmac
SAMEdiskpart
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发明人：KURODA, Kouichi; c/o Sumitomo Metal Ind., Ltd.,OKUI, Tatsuya; c/o Sumitomo Metal Ind.,
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刘艺彬Ltd.,HITOSHIO, Keisuke; c/o Sumitomo有声读物mp3
Metal Ind., Ltd.
申请号：EP04705922.5
申请日：20040128
beamangle公开号：EP1595609B1
公开日：
广州形象设计学校20080109
专利内容由知识产权出版社提供
complaints摘要：A steel tube hot-finished by the Mannesmann tube-making method is subjected to a simple grinding process for the inner surface, and thereafter to a cold drawing, so that the depth d of the concave portion in the concavo-convex profile forming the inner surface of the steel tube, the surface roughness Ra and the width w of the entrance in the concave portion are specified, or similarly the depth d of the concave portion in the concavo-convex profile, the Vickers hardness Hv of the inner surface layer and the width w of the entrance in the concave portion are specified, hollow parts for a drive shaft, which have an excellent fatigue strength and which is optimal to reduce the weight of a c
ar body, can be produced. Accordingly, the application of the manufacturing method according to the prent invention allows drive shafts for automobiles to be efficiently produced in a reduced manufacturing cost, thereby providing a significant advantage in the industry.
申请人：SUMITOMO METAL IND 地址：JP
国籍：JPcarzy什么意思
代理机构：Simons, Amanda Loui 更多信息请下载全文后查看
