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在加工如图1所示的支架座的缺口时,操作者将工件放在30°的角度垫板上,用机用虎钳夹紧,然后将虎钳转过25°使进给方向在缺口中心平面内并与虎钳底面平行,如图2所示。铣削后,发现缺口侧面与工件底面不垂直,如图1A向视图中的细线所示而成为废品,现分析其产生的原因。如图3所示,矩形A B C D所在平面P和矩形A_1B_1 C D所在平面Q相交于直线C D,两平面的夹角为θ,矩形A A_o C_o C所在平面R垂直于平面P,与平面P相交于直线A C,并与平面Q相交于直线A_1 C,直线AA_o垂直于平面P,与平面P相交于A,并与平面Q相交于A_1,直线A_1 E垂直于平面Q,因直线DC垂直于
While machining the indentation of the holder base as shown in Fig. 1, the operator places the workpiece on a 30 ° angle pad, clamps with a machine vise, and turns the vise through 25 so that the feed direction is at the notch Center plane parallel to the underside of the vice, as shown in Figure 2. After milling, it is found that the notched side is not perpendicular to the bottom surface of the workpiece, as shown by the thin lines in the view of FIG. 1A, which is a waste product, and the reason for the occurrence is now analyzed. As shown in FIG. 3, the plane P where the rectangle ABCD is located and the plane Q where the rectangle A_1B_1 CD is located intersect on a straight line CD, the angle between the two planes is θ, the plane R of the rectangle A A_o C_o C is perpendicular to the plane P, AC intersects plane Q at line A_1 C, line AA_o is perpendicular to plane P, intersects plane P at A, intersects plane Q at A_1, line A_1 E is perpendicular to plane Q,