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根据螺纹尺寸、精度和表面质量要求,以及生产批量等因素,可以采用不同的加工方法和螺纹刀具来加工螺纹。对于M20以下小批量生产的螺纹,一般将丝锥和板牙放在车床尾座上进行攻丝和套丝。这种方法劳动强度大、辅助时间长、丝锥和板牙寿命低,且加工零件的质量较差。本文介绍的方法是将丝锥和板牙放到攻丝和套丝夹具里,再将攻丝、套丝夹具固定在车床小刀架上,见图所示。夹具材料为45钢,夹具前端的莫氏3号锥孔用以安装丝锥和板牙,夹具后端的腰眼孔用以拆卸丝锥和板牙。夹具莫氏3号孔和装进的丝锥和板牙的中心线应与车床主轴线重合,图中垫片用来调整中心高。根据工件的螺距、材质和硬度选用不同的主轴转数,走刀量的选择应和用丝杆走刀时相近。在攻
Depending on the thread size, accuracy and surface quality requirements, as well as the production volume and other factors, different machining methods and thread cutters can be used to machine the threads. For the M20 following small-batch production of thread, generally on the lathe tailstock tapping and Taose on the tailstock. This method of labor-intensive, aids a long time, tap and die life is low, and the quality of the processed parts is poor. This article describes the method is to tap and die put Tapping and Tapping fixture, and then Tapping, Tapping fixture fixed to the lathe knife holder, as shown. The fixture is made of 45 steel. The front of the fixture is equipped with a Morse No. 3 tapered hole to mount the tap and the die. The rear eyelet of the fixture is used to remove the tap and the die. Mohs fixture No. 3 hole and into the tap and die centerline should coincide with the lathe main axis, the figure used to adjust the center of the gasket high. According to the pitch of the workpiece, the choice of material and hardness of the spindle speed, the choice of the amount of cutting should be similar with the screw when walking. In the attack