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拉刀广泛用于机械工业、汽车、拖拉机制造业、造船业及国防工业,是工业中最为重要的工具之一。拉刀形状细长,结构复杂,精密度高,选材较为严格,制造难度大,造价昂贵,因此制造厂对拉刀的生产特别重视。拉刀热处理中最关键的问题有两个,一是防止大直径拉刀热处理裂纹的发生;二是防止和减小拉刀热处理弯曲变形,尤其是那些长径比大的细长拉刀。本文根据工厂长期生产实践经验,对拉刀的热处理做一粗浅探讨。
Broach is widely used in machinery industry, automobile, tractor manufacturing, shipbuilding and defense industry, is one of the most important tool in industry. Broach slender shape, complex structure, high precision, more stringent material selection, manufacturing difficulty, high cost, so the manufacturer of broach production with special emphasis. Broaching heat treatment in the two most critical issues, first, to prevent the large diameter broach heat crack; second is to prevent and reduce broaching heat treatment bending deformation, especially those slender broach large aspect ratio. This article according to the factory long-term production practice, broach heat treatment to do a superficial discussion.