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四、工件偏心运动法图5所示为采用工件偏心运动法加工椭圆形工件的装置,该装置的轴1与车床主轴法兰盘相联,支架3固定在车床床身上,利用3个螺钉使件4与件1成一偏心,偏心距为a-b。件5的侧面及件7上各有长方滑槽,件6的二个侧面有相互垂直的凸块,分别与件5、件7上滑槽配合。工件装夹在件6上。在车床主轴转动时,件6的中心一方面随主轴转动,另一方面由于件5、件7的相互作用按一定规律移动。原理如图6,O为主轴中心,O′为壳体旋转中心OO′=a-b。OB和OC
Fourth, the workpiece eccentric movement Figure 5 shows the use of eccentric workpiece movement oval-shaped workpiece device, the device shaft 1 and the lathe spindle flange associated bracket 3 fixed to the lathe bed, the use of three screws Pieces 4 and 1 into an eccentric, eccentricity ab. The side of the piece 5 and the piece 7 are respectively provided with a rectangular sliding groove. The two sides of the piece 6 are provided with projections which are perpendicular to each other and are respectively matched with the sliding grooves on the piece 5 and the piece 7. The workpiece is mounted on the piece 6. During the rotation of the lathe spindle, the center of the piece 6 rotates on the one hand with the main shaft and on the other hand, due to the interaction of the pieces 5 and 7, it moves in a regular manner. The principle shown in Figure 6, O is the center of the spindle, O ’is the rotational center of the housing OO’ = a-b. OB and OC