锻压技术

DTT式100 mm头螺毛坯产品工艺改进

英文标题：Improvement of process of 100 mm head screw blank with DTT type

单位：辽宁华山工业有限公司

分类号：TG312,TG316

出版年,卷(期):页码：2014,39(5):9-12

摘要：

DTT式100 mm头螺毛坯产品的原生产工艺是经二次中频加热，整体冲压拉伸收口、后续需机加切断，并由整体分成分体，其产品的壁偏差过大，为6~8 mm，因此需在热处理前进行二次粗加工，以保证产品的壁偏差达到设计要求。对工艺进行研究和优化设计，改进的生产工艺为经一次加热、三工位一次挤压完成，其产品的壁偏差小于0.8 mm，达到了设计要求，并取消了产品热处理前的粗加工和半精加工。同时降低了材料消耗定额，提高了产品合格率，缩短了生产周期，提高了生产效率。 ?

The original manufacturing process of 100 mm screw head blank with DTT type is as follows:the piece is heated with twice medium frequency, and integrally contracted by stamping and stretrching,subsequently cut-off by maching and divided from a whole part. The wall deviation of products is 6-8 mm which is too larger. So the second rough machining before heat treatment is needed to ensure the wall deviation meeting the design requirements. The study and optimum design of process were carried out. The improved manufacturing process is once heating and three-station once extrusion forming, and wall deviation of is less than 0.8 mm，which achieves the design requirements. The roughing and semi-finishing of products before heat-treatment is cancelled. Meanwhile, the material consumption quota is reduced, the production cycle is shortened, and the product quality and production efficiency are improved.?

基金项目：

材料成形与模具技术国家重点实验室开放基金资助项目（2011-P07）

井振海（1964-）男，本科，高级工程师

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