硬质合金钻头固齿工艺的研究

Study of Tooth Fixing Technique for Hard Alloy Bit

通过球齿钻头的冷压、热嵌和钎焊固齿工艺、技术参数的分析研究,指出钎焊较有前途.

A Failure of a balltooth bit mainly is a breaking of peripheral tooth due to inproper tooth fixing technique and parameters to be used. Base on great practices and experiments of rock drilling, this paper has detailly analyzed suitable conditions and parameter selecteons of hot inserted, cold press and braze welding tooth fixing techniques. From the analyses of tooth firmly fixed, anti-radial abrasion, providing tooth regrinding, reducing machining cost, increasing labour and production efficiency, simple technique and others, the braze welding tooth fixing technique has more advantages than others. Therefor, an induction braze welding tooth fixing is best for the ball tooth bit with a small diameter. A press fixing is best for the ball tooth bit with a large diameter.