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在哈尔滨“刃具革新能手表演大会”上出现一种双刀切削梯形螺纹,引起了到会同志很大兴趣。这种刀具是哈尔滨锅炉厂车工沈洪聚同志在加工38合金钢阀体过程中,积极钻研而改进成功的,用来切削梯形螺纹提高效率2倍以上。刀具体的结构如图1所示,头部可以旋转。两把刀具沿垂直方向装好后,借头部的旋转可以转过一个螺旋角;这样在磨刀时就可以不考虑不等的后角。刀具是用锋钢制成的,几何角度如图2所示。上切刀的刀尖宽度比下切刀窄0.2～0.3毫米;
The emergence of a double-edged trapezoidal thread at Harbin’s “Cutting Edge Innovator Performance Conference” attracted a great deal of interest from the comrades here. This tool is Harbin boiler factory mechanic Shen Hong Poly comrade in the process of 38 alloy steel body, actively study and improve successfully, used to cut the trapezoidal thread to improve efficiency more than 2 times. The structure of the knife as shown in Figure 1, the head can be rotated. After the two tools are mounted in the vertical direction, the helix angle can be turned by the rotation of the head; thus, the unequal relief angles can be ignored when sharpening. Tool is made of front steel, the geometric angle shown in Figure 2. On the cutter tip width than the next cutter narrow 0.2 ~ 0.3 mm;