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图1所示为T4280型双柱坐标镗床纵向丝杠副装配示意图。图中件1为前轴瓦,件2为纵向丝杠,件3 为丝杠螺母,件4为后轴瓦,件5为轴向定位套,件6为定位螺母,件7为锁紧螺堵。当纵向丝杠旋转时,丝杠螺母轴向移动,从而带动工作台作纵向移动,实现纵向坐标的定位。纵向丝杠的轴向定位是由丝杠右端的轴肩、轴向定位套5与后轴承座及后轴瓦来实现的。定位螺母6用来调节轴向间隙,并通过锁紧螺堵7实现锁紧,以保证轴向定位的可靠性。但在实际工作中发现:由于后轴承座及后轴瓦端
Figure 1 shows the T4280 double column boring machine longitudinal screw assembly schematic diagram. Piece 1 is a front bearing bush, piece 2 is a longitudinal screw, piece 3 is a lead screw nut, piece 4 is a back bush, piece 5 is an axial locating sleeve, piece 6 is a locating nut, piece 7 is a locking screw plug. When the longitudinal screw rotation, the screw nut axial movement, which led to the table for longitudinal movement, to achieve the longitudinal coordinate positioning. Longitudinal screw axial positioning is by the shaft of the right end of the screw, the axial positioning sleeve 5 and the rear bearing and the rear bearing to achieve. Positioning nut 6 is used to adjust the axial clearance, and through the locking screw 7 to achieve locking, to ensure the reliability of axial positioning. But in the actual work found: due to the rear bearing and the end of the bearing pad