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将轴瓦从两端上口一定范围（距上口10～20°）按要求逐渐向上口减薄,主要是为了克服装配后的轴瓦口内缩现象。 轴瓦内孔加工一般有镗削、拉削、刮削等方法。而镗削是应用较广泛的一种方法。图1是我厂镗削加工减薄区的一种模具结构示意图。在衬模靠近上口处开一“槽”,调节调整螺钉,通过圆柱销,使衬模带动轴瓦一起向里收缩,收缩量由调整螺钉控制。轴瓦品种繁多,减薄区的要求不一致。对于减薄区长度要求较短的轴瓦, 使用这种镗模结构,减薄的区域往往会超长。这是由衬模结构本身决定的。
The bearing bush from both ends of a certain range of mouth (from the mouth of 10 ~ 20 °) gradually increased according to the requirements of the mouth thinning, mainly in order to overcome the phenomenon of contraction of the bearing bush mouth after assembly. Bearing bore machining boring, broaching, scraping and other methods. Boring is a more widely used method. Figure 1 is a schematic view of the mold structure of our factory boring and processing thinning area. In the liner near the mouth to open a “slot”, adjust the adjustment screw, through the cylindrical pin, so that the liner with the bearing bush to shrink inward, the amount of shrinkage by the adjustment screw control. Bearing a wide range of thinning area inconsistent requirements. For the thinning area length of the shorter bush, the use of this structure of the boring, thinning area tend to be long. This is determined by the lining structure itself.