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目前,圆拉刀、花键拉刀的前面刃磨有两种方法。锥面刃磨法是用砂轮锥面刃磨,如图1所示。其砂轮直径D_砂和安装角β的关系: D_砂=0.85D_刀·sin(β-γ)/sinγ这种刃磨法得到的前面是一个锥面,在拉刀轴向剖面中,其前面是一条直线。球面刃磨法是砂轮的外缘进行刃磨。用这种方法刃磨出来的前面是球台面,在拉刀轴向剖面内,其前面是圆弧(见图5)。
Currently, there are two ways to round the front of a circular broach or a spline broach. Cone sharpening method is grinding wheel cone surface, shown in Figure 1. The relationship between the diameter of the grinding wheel D_ sand and the mounting angle β: D_share = 0.85D_knife · sin (β-γ) / sinγ This sharpening method is preceded by a taper in the axial section of the broach , In front of a straight line. Spherical grinding method is grinding the outer edge of the grinding wheel. Sharpened out in this way is the ball table top, which is circular in front of the broach axial section (see Figure 5).