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工程机械的活塞杆磨削工艺,是在半精磨外圆后,表面镀硬铬(镀铬层厚0.3—0.5)再精磨外圆表面至终加工尺寸。这里一直存在一个问题影响着生产率的提高:半精磨的工件材质是45钢,精磨工件材质为硬铬,后者硬度明显高于前者,而这二道工序是在同一台外圆磨床上完成。砂轮一般不能更换。按砂轮的选用原则,对于较硬工件,应选较软砂轮才合理,故应寻求活塞杆不合理磨削的解决途径。一、关于砂轮的硬度和自锐性硬度是砂轮的主要特征之一,它决定了磨削时磨粒脱落的难易程度,直接影响磨削生产率,工件精度及表面光洁度。砂轮硬度合
Construction machinery piston rod grinding process, is in the semi-fine grinding cylindrical, hard chrome plated surface (chrome layer thickness 0.3-0.5) and then refined cylindrical surface to the final processing size. There is always a problem that affects productivity: the material of the semi-finished part is 45 steel and the material of the finished part is hard chrome, which is significantly harder than the former, and the two processes are on the same cylindrical grinder carry out. Grinding wheel generally can not be replaced. According to the selection principle of grinding wheel, for harder workpieces, it is reasonable to choose the softer grinding wheel, so the solution of unreasonable grinding of piston rod should be sought. First, on the wheel hardness and self-sharpening Hardness is one of the main features of the wheel, which determines the grinding abrasive off the degree of ease, a direct impact on the grinding productivity, workpiece accuracy and surface finish. Wheel hardness combined