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通过采用硬质合金高速滚齿来提高生产效率是我厂技术改造的重要项目之一。1974年以来在机械工业部成都工具研究所的大力协助下,首先采用硬质合金滚刀加工北京212吉普车的夹布胶木正时齿轮。该齿轮原用高速钢滚刀切齿时,由于其温度变化大(25℃至40℃)而造成加工工艺尺寸难以控制,而且表面光洁度低(达不到▽_6),毛刺多,不易清除。尤其是用高速钢滚刀滚切时,刀齿常成排断裂;刀具寿命也低,每年加工二万件齿轮,年消耗50把滚
Through the use of high-speed carbide hobbing to improve production efficiency is one of the important projects of our factory’s technological transformation. Since 1974, the Ministry of Machinery Industry, Chengdu Institute of Tooling, with the great help, the first carbide hob cutting Beijing 212 jeep cloth bakelite timing gear. The gear hobbing with high-speed steel hob, due to its large temperature changes (25 ℃ to 40 ℃) caused by the size of the processing process is difficult to control, and the surface finish is low (up to ▽ _6), burr and more difficult to remove. Especially when using high-speed steel hob hobbing, the cutter teeth often rupture in rows; tool life is also low, the annual processing 20,000 gears, the annual consumption of 50 rolling