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电动工具用粉末冶金手紧丝母模具设计

Die design of powder metallurgy hand tight nuts used for power tools

  • 摘要: 电动工具用粉末冶金手紧丝母外形复杂。通过对手紧丝母产品结构、成形工艺认真分析,结合三维设计软件和实际生产实践,找出合理模具结构和尺寸。压制产品经高温烧结后,产品密度和尺寸均达到设计要求,检测中心与客户检测合格。批量生产电动工具用粉末冶金手紧丝母产品,采用30 t机械压机压制,压机模架结构为上二下二。在其他模具不变情况下,整体成形上冲压制产品在生产50007000件时开裂报废。安装成形上外冲和成形上内冲压制产品,生产100000120000件手紧丝母,模具磨损,需要修复。使用成形上外冲和成形上内冲方案,模具使用寿命提高,减少生产成本,生产出来的电动工具用粉末冶金手紧丝母完全达到了产品设计要求。

     

    Abstract: The structure of powder metallurgy hand tight nuts used for power tools is complex. The reasonable die structure and size were found out in this paper by the careful analysis of product structure and forming process, combining with 3D design software and actual production practice. In the results, after sintering the pressed products at high temperature, the density and size of the products meet the design requirements, and successfully pass the testing of testing center and customer. Mass production of powder metallurgy hand tight nut dies for power tools are prepared by 30 t mechanical press pressing, the structure of which includes two up and two down. The overall pressed products by up-punching forming are cracked and scrapped when 5000~7000 pieces are produced. Pressing products by the outside and inside punching forming, the dies are worn and need to be repaired after the production of 100000~120000 pieces of hand tight nuts. Using the forming scheme of the outside and inside punching, the die service life is increased, the production cost is reduced, and the produced powder metallurgy hand tight nut dies for power tools fully meet the design requirements.

     

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