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预紧弹簧是航空离合器的关键部件,对尺寸精度与表面质量均有较高的要求,其加工过程需要经过下料、钻孔、线切割成形、压弯、修长度五个工序,其中压弯工序一直是行业的技术难题。本研究通过对产品特点及原压弯模具结构进行分析研究,确定凹模形式、凸模精度及凸模高度调整问题为造成产品质量差的原因,并对模具结构进行了改进设计与加工,经生产验证,产品尺寸精度良好,合格率由60%提高到了90%,有效地提升了产品质量。
Preload spring is a key component of the aviation clutch, which has high requirements on the dimensional accuracy and surface quality. The process of the pretensioning spring requires five processes of blanking, drilling, wire cutting forming, bending and repairing, Process has always been a technical problem for the industry. In this study, the characteristics of the product and the structure of the original bending die were analyzed and studied to determine the die form, punch accuracy and punch height adjustment problems caused by poor product quality reasons, and the mold structure has been improved design and processing, the Production verification, product size accuracy, pass rate from 60% to 90%, effectively improving product quality.