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超精加工工艺的主要特点是,可在几十秒钟的加工时间内,使零件的表面光洁度在原有基础上提高2～3级;同时也可改善零件表层的残余应力。所以,在纺织机械的锭杆轴承部份和滚动轴承的滚道部份,都采用这种高生产效率的超精加工工艺。影响超精加工效果的工艺参数有:工件的线速度v_W,油石的往复行程a,油石的往复频率f,以及作用在油石上的压力p,见图1。我们为了探索较佳工艺参数对零件表面质量的影响,在改装的C616车床上作了一些试验,试件材料为45钢和GCr15轴承钢,其硬度分别为HRC51～52和HRC61～63。试件尺寸是:外径×内径×宽度为60×50×10mm。试验中所用的油石,均由上海滚动轴承厂提供。试验的结果归纳为以下七点,现介绍于下。 1.超精加工的时间,一般为几十秒钟从GCr15钢的试验结果可以看出,超精加工可以
The main feature of the super finishing process is that the surface finish of the parts can be raised by 2 to 3 on the basis of the original machining time within the processing time of several tens of seconds and the residual stress of the surface of the part can also be improved at the same time. Therefore, in the spindle bearings of textile machinery and roller bearing part of the raceway, are using this high production efficiency superfinishing process. Affect the superfinishing effect of the process parameters are: the workpiece line speed v_W, whetstone reciprocating stroke a, whetstone reciprocation frequency f, and the role of the stone on the pressure p, shown in Figure 1. In order to explore the influence of better process parameters on the surface quality of parts, we made some experiments on the modified C616 lathe. The test materials are 45 steel and GCr15 bearing steel with HRC51 ~ 52 and HRC61 ~ 63 respectively. The specimen size is: OD × ID × width of 60 × 50 × 10mm. Whetstone used in the test, both by the Shanghai Rolling Bearing Factory. The test results summarized in the following seven points, are introduced below. 1. Superfinishing time, usually several seconds from the GCr15 steel test results can be seen, superfinishing can