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我厂制造的苏式龙门铇床中,有许多钢套及耐磨铸铁件,它们的内孔都需要经过磨削加工,表面光洁度要达到8～9。但我们在磨削时,表面光洁度很难达到要求,特别是带键槽的内孔,更不容易达到要求。根据这种情况,我们进行了多次的研究,有的同志认为是砂轮修整得不好,并应使砂轮和工件的接触面积减小。于是,我们就用窄砂轮进行试验,可是结果仍然不好。去年,苏联专家来我厂指导工作,看到这个问题,就建议我们采用宽砂轮来磨削内孔,并根据工件内孔直径和键槽来选择砂轮的规格。我们根
I plant the Soviet-style gantry crane bed, there are many sets of steel and wear-resistant cast iron, and their inner holes have to go through grinding, surface finish to reach 8 to 9. However, when we grind, the surface finish is difficult to meet the requirements, especially the keyway bore, it is more difficult to meet the requirements. According to this situation, we conducted a number of studies, some comrades think that wheel dressing is not good, and the wheel and the workpiece should be reduced contact area. So, we use a narrow wheel test, but the result is still not good. Last year, Soviet experts came to our factory to guide their work. If we see this problem, we suggest that we use a wide grinding wheel to grind the inner hole and select the specifications of the grinding wheel according to the hole diameter and the keyway of the workpiece. Our roots