METHOD OF MANUFACTURING COIL SPRING USING HELICOID

专利名称：METHOD OF MANUFACTURING COIL

SPRING USING HELICOID REDUCTION MILL

发明人：JUNG, CHAN-GI申请号：EP09844470申请日：20090604公开号：EP2282855A4公开日：20161012

摘要：A method of manufacturing a coil spring using a helicoid reduction mill includessupplying a coil spring material linearly unrolled by a prestraightener to a surfacetreatment machine and then short-blasting or scarfing its outer surface to surface-treatthe coil spring material; primarily heating the surface-treated coil spring material to apredetermined temperature using a first heater; sequentially supplying and pressurizingthe primarily-heated coil spring material in a stepwise fashion such that the coil springmaterial has the same diameter as that of a coil spring to be manufactured; measuringthe diameter and the length of the coil spring material and then cutting the coil springmaterial to a desired size; secondarily heating the cut coil spring material to a

predetermined temperature using a second heater; forming the secondarily heated coilspring material into a coil spring using a coiling machine; and oil-quenching and thentempering the formed coil spring.

申请人：DAE WON KANG UP CO., LTD.

更多信息请下载全文后查看