the numerical control hot spinning process of forming high pressure c ylinder liu sixin (qinghai heavy machine tool plant) abstract:the hot spinnig process of forming high pressure c ylinder which using home-made numerical control machine,is introduced.this proc ess has the advantage of the higher material utilization and production officien cy. key words:numerical control machine,coreless mould spinning ,spinning roller,spinni 图1所示为φ229mm高压贮气瓶制件图,材料为30crmo,大批量生产。该制件国内传统的 制造方法 是将管坯切成统一的给定长度,预加热后用手工操作的模板式收口热成形工艺,此成形方 式的 缺点是成形部件的外形轮廓达不到图纸要求,产品的一致性不好,由于手工控制收口过程导 致人为因素,造成废品率较高,浪费较大。