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根据砂带磨削的原理设计了开式接触轮式砂带磨削装置,并将其应用于普通车床,对机械加工中较难加工的细长轴进行砂带磨削试验。通过试验分析了砂带转速、工件转速、磨削深度等因素对工件表面粗糙度的影响,并对磨削参数进行优化。结果表明在车床上采用开式接触轮式砂带磨削装置对细长轴进行精加工,能有效地降低表面粗糙度。在工件转速nW=1 000 r/min、砂带转速nS=3 r/min、磨削深度ap=0.07 mm、纵向进给速度f=0.02 mm/r条件下,能获得最优的表面粗糙度Ra0.48μm。
According to the principle of abrasive belt grinding, an open-contact wheeled belt grinding device is designed and applied to ordinary lathe to test abrasive belt grinding of difficult long shaft in machining. The influences of belt rotating speed, workpiece rotating speed and grinding depth on the surface roughness of the workpiece were analyzed through experiments, and the grinding parameters were optimized. The results show that the use of open contact wheeled abrasive belt grinding device on the elongated shaft finishing, can effectively reduce the surface roughness. The optimal surface roughness can be obtained under the conditions of workpiece speed nW = 1000 r / min, belt speed nS = 3 r / min, grinding depth ap = 0.07 mm and longitudinal feed rate f = 0.02 mm / r Ra 0.48 μm.