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图1所示的扁圆拉刀具有一对半径为R的圆弧型面,R的中心与拉刀的轴心线有一个偏心距。而且各切削齿的偏心值不相等,随拉刀的齿升递增。用于刃磨扁圆拉刀圆弧型面的后角的偏心夹具如图2所示。图3为夹具的结构图。1为一对平行的心轴,支架9可在心轴上滑动并以螺钉10固定,盖板7用螺钉固定在支座9上,旋转调节螺杆6能使顶尖上下移动,压块4和螺钉5用以固定顶尖,螺钉3用于拉刀位置微调,反顶尖8为夹具在机床上的安装基准,它与顶尖2的轴线应在同一个平面内。使用时的调整如下:调整两支架间的距离,以便将拉刀安装在两顶尖间,拧紧螺钉10。然后将夹具连同拉刀装在机床
The billet broach shown in Figure 1 has a pair of arcuate profiles of radius R and the center of R has an eccentricity from the axis of the broach. And the eccentricity of the cutting teeth are not equal, with the broach tooth raises. Eccentric jig used to sharpening the rear corner of the arcuate profile of the flat round broach is shown in FIG. 2. Figure 3 is the structure of the fixture. 1 is a pair of parallel mandrels, the bracket 9 can slide on the mandrel and fixed with screws 10, the cover plate 7 is screwed to the holder 9, the rotation adjustment screw 6 can make the top move up and down, the pressure block 4 and the screw 5 For fixing the top, screw 3 for broaching position fine-tuning, anti-tip 8 for the fixture on the installation of the machine base, it is the axis of the top 2 should be in the same plane. Use the following adjustments: Adjust the distance between the two brackets in order to install the broach between the two tips, tighten the screw 10. Then fix the fixture together with the broach on the machine