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过去我厂车削低压防爆开关端盖(图1),是在CQ61100车床上用四爪卡盘夹紧。由于法兰端面厚度尺寸小,车后端面变形大,尽管在精车前先把卡盘适当地松一松,但是精车后端面变形仍然较大,平面度公差值超差,而且数值大小不等,严重的超出公差值4～5倍,废品率很高。为了减少端面变形,我们设计制造了一种装卡工具(图2),固定在四爪卡盘的卡爪上,工具随同卡盘爪移动而卡紧工件。由于该工具的卡板2两端与工件接触,本身又可以绕销轴7摆动,卡紧时工件受到8个卡紧力的作用,工件与卡板的接触面积又比直接用四爪装卡时大大增加,因此在承受相同切削力的情况下,
In the past I plant turning low-pressure explosion-proof switch cover (Figure 1), is the use of four-jaw chuck CQ61100 lathe clamping. Due to the small thickness of the flange end face, the deformation of the rear face of the car is large. Although the chuck is properly loosened before the fine car, the deformation of the rear face of the finishing car is still large, the tolerance of the flatness is over tolerance and the value of the size Ranging from serious 4 to 5 times the value of the tolerance, the rejection rate is high. In order to reduce the deformation of the end face, we design and manufacture a chucking tool (Figure 2), which is fixed on the jaws of the four-jaw chuck. The tool moves along with the chuck jaws to clamp the workpiece. As the two ends of the tooling board 2 contact with the workpiece itself can swing about the pin 7, when clamping the workpiece by 8 clamping force, the contact area of the workpiece and the card board than the direct use of four claws installed card When greatly increased, so in the case of the same cutting force,