发明名称 |
Method of manufacturing coil spring using helicoid reduction mill |
摘要 |
A method of manufacturing a coil spring using a helicoid reduction mill includes supplying a coil spring material linearly unrolled by a prestraightener to a surface treatment machine and then short-blasting or scarfing its outer surface to surface-treat the coil spring material; primarily heating the surface-treated coil spring material to a predetermined temperature using a first heater; sequentially supplying and pressurizing the primarily-heated coil spring material in a stepwise fashion such that the coil spring material has the same diameter as that of a coil spring to be manufactured; measuring the diameter and the length of the coil spring material and then cutting the coil spring material to a desired size; secondarily heating the cut coil spring material to a predetermined temperature using a second heater; forming the secondarily heated coil spring material into a coil spring using a coiling machine; and oil-quenching and then tempering the formed coil spring. |
申请公布号 |
US8438733(B2) |
申请公布日期 |
2013.05.14 |
申请号 |
US20090937817 |
申请日期 |
2009.06.04 |
申请人 |
JUNG CHAN-GI;DAE WON KANG UP CO., LTD. |
发明人 |
JUNG CHAN-GI |
分类号 |
B21F35/00 |
主分类号 |
B21F35/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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