我车间所用花键拉刀的柄部尺寸,随拉刀规格不同,分为φ75、φ62、φ50三种。在使用下,一般都是以调换相应拉刀夹头,夹持拉刀颈部进行拉削。夹头轴端加工有M100×4螺纹,与拉床(苏制7 A 540型)本体连接。调换夹头相当麻烦,不仅吃力,而且浪费时间达一个多小时,同时还会加速螺纹的磨损。我们改用夹头重叠法,即以固定在拉床的φ75夹头做基体,当拉 Spline broach used in my workshop handle size, with the broach specifications are divided into φ75, φ62, φ50 three. In use, the general is to exchange the corresponding broach chuck, broach neck clamping broaching. Chuck shaft end processing M100 × 4 thread, and the broaching machine (Soviet-made 7 A 540 type) body connection. Replacing the chuck is rather troublesome, not only laborious, but also wasting time for more than an hour, while also accelerating thread wear. We use the chuck overlap method, that is fixed in the broach φ75 chuck as the base, when pulled