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在铣削汽车绞盘减速器球面蜗杆不完整齿部分时(图1),是靠球面蜗杆端面中心孔和精磨轴颈φ40_(+0.018)~(0.035)来定心的,定心后再夹紧44的两个面和定心轴颈φ40_(+0.018)~(0.035)。由于在上一道工序加工44的两个面时,保证不了两个面的对称中心,有时相差一毫米之多,这样都会出现保证定心而夹不紧的现象或者是相反的结果。因此,需要设计一套自位夹具,在44的两个平面
In the process of milling the incomplete gear part of the spherical worm gear of the winch reducer (Figure 1), centering on the center hole of the spherical worm gear and the fine grinding journal φ 40 _ (+ 0.018) ~ (0.035) 44 of the two sides and the centering journal φ40 _ (+0.018) to (0.035). As in the previous process 44 of the two faces, can not guarantee the symmetry of the two sides of the center, sometimes a difference of a millimeter, so there will be guaranteed to the centering and clamping is not tight phenomenon or the opposite result. Therefore, you need to design a set of self-fixture, in the two planes of 44