锻压技术

双金属温度补偿片的精整加工技术

英文标题：Advanced finishing technology for bimetal temperature compensation sheet

作者：曹立林李杨

分类号：TG305

出版年,卷(期):页码：2020,45(3):37-40

摘要：

航空用双金属温度补偿片要求能够可靠地起到温度补偿作用，对内、外形的形位公差及断面粗糙度要求较高，从分析双金属温度补偿片结构特点和冲压工艺性入手，结合生产需求，提出了小余量切削的精整加工工艺方案。详细解析了精整工艺参数设计方法，并对倒装及正装复合精整模具结构进行优劣对比分析，最终选用正装式复合精整模具结构，其能够在足够小的余量切削条件下一次完成整修加工，保证断面粗糙度要求；同时，巧妙地将3面定位改为6点定位，解决了废料挤压在定位板与工件之间而造成的操作困难以及定位板变形问题。生产实践证明，采用该工艺方法及模具结构取得的效果良好，不仅大大提高了生产效率，产品合格率也得到显著提升。

The bimetal temperature compensation sheet for aviation is required to be able to reliably perform temperature compensation, and the tolerances in internal and external positions as well as the cross-section roughness requirements are high. Therefore, starting from the analysis of structural characteristics and stamping process of the bimetal temperature compensation sheet and combining production requirements, the finishing process plan for small allowance cutting was proposed, and the finishing process parameter design method was analyzed in detail. Then, the advantages and disadvantages of the structures for inverted and formal composite finishing dies were analyzed, and the structure of formal composite finishing die was selected in the end, which completed the finishing at one time with small enough margin to ensure the roughness requirement of section. At the same time, the three-sided positioning was changed to six-point positioning to solve the operation difficulty and positioning plate deformation problems caused by the squeeze of the waste material between the positioning plate and the workpiece. The production proves that the process and the structure of die achieve good results, which not only greatly improves the production efficiency, but also significantly improves the product qualification rate.

基金项目：

曹立林（1970-），女，学士，高级工程师 E-mail：735613732@qq.com 通讯作者：李杨（1986-），男，学士，工程师 E-mail：584185446@qq.com

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