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直径50～52毫米波形螺纹连接四齿、五齿、六齿冷压球齿钎头是以我们为主,洛阳工学院贠自均、李延祥和洛阳兴隆机械厂参加,而研制成功的。由洛阳兴隆机械厂生产。这一产品已于1983年11月通过了技术鉴定,质量达到了国内同类产品的先进水平,基本接近瑞典钎头的水平。并同意批量试生产。冷压工艺制造球齿钎头,这是一种新兴的
Diameter 50 ~ 52 mm wave thread connection four teeth, five teeth, six teeth cold pressure ball tooth bit is our main, Luoyang Institute of Science from the average, Li Yanxiang and Luoyang Xinglong Machinery Factory to participate, and the successful development. Xinglong Luoyang Machinery Factory production. This product passed the technical appraisal in November of 1983, the quality has reached the advanced level of similar products in our country, basically approaching the level of Swedish bit. And agree to batch trial production. Cold-pressed ball-bit manufacturing process, which is a new