柱形动压气浮轴承马达轴精密磨削加工工艺研究
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摘要
针对GT35动压马达轴精密加工精度难以保证、效率低、成本高的难题,开展马达轴精密磨削加工工艺研究。通过开展不同结合剂,不同粒度、浓度的金刚石砂轮磨削对比试验,研究不同砂轮参数对工件形状精度、表面质量、比磨削能等的影响规律,设计超硬磨料砂轮;通过正交试验,确定影响轴精密磨削表面粗糙度、圆度、圆柱度的最优工艺参数;采用最优磨削参数对20件马达轴开展了磨削加工验证试验。研究得到:当工件转速304 r/min、进给速度0.003m/min、进给量1μm时,获得最优的马达轴圆度0.11μm、圆柱度0.34μm、粗糙度Ra0.041μm的合格工件。
Aiming at the problem that precision of GT35 dynamic motor shaft was difficult to be guaranteed,and its low efficiency and high cost,the research on precision grinding process of motor shaft was carried out. The influencing rules of different grinding wheel parameters on workpiece shape accuracy,surface quality,specific grinding energy and so on were studied by comparing different diamond grinding wheels with different binders,different particle size and concentration,and the grinding wheel with super-hard abrasives was designed. Through orthogonal test,the optimal process parameters which influenced the axis precision grinding surface roughness,roundness,cylindrical degree were determined. By making use of optimal grinding parameters to 20 motor shaft grinding,the validation test was carried out. The result shows that the best workpiece with roundness 0. 11 μm,cylinder 0. 34 μm and roughness Ra 0. 041 μm is obtained when the workpiece speed is 304 r/min,feed speed is 0. 003 m/min and feed rate is 1 μm.
Aiming at the problem that precision of GT35 dynamic motor shaft was difficult to be guaranteed,and its low efficiency and high cost,the research on precision grinding process of motor shaft was carried out. The influencing rules of different grinding wheel parameters on workpiece shape accuracy,surface quality,specific grinding energy and so on were studied by comparing different diamond grinding wheels with different binders,different particle size and concentration,and the grinding wheel with super-hard abrasives was designed. Through orthogonal test,the optimal process parameters which influenced the axis precision grinding surface roughness,roundness,cylindrical degree were determined. By making use of optimal grinding parameters to 20 motor shaft grinding,the validation test was carried out. The result shows that the best workpiece with roundness 0. 11 μm,cylinder 0. 34 μm and roughness Ra 0. 041 μm is obtained when the workpiece speed is 304 r/min,feed speed is 0. 003 m/min and feed rate is 1 μm.
引文
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[2]张海南.超硬微结构光学功能表面的ELID磨削加工技术研究[D].哈尔滨:哈尔滨工业大学,2013.
[3]金卫东.硬脆材料氮化硅陶瓷的ELID超精密磨削技术研究[D].天津:天津大学,2005.
[4]关佳亮,朱磊,孙鲁青,等.聚晶金刚石的ELID精密磨削试验研究[J].制造技术与机床,2016(1):89-93.GUAN J L,ZHU L,SUN L Q,et al.Research on ELID Precision Processing Technology of Polycrystalline Diamond[J].Manufacturing Technology&Machine Tool,2016(1):89-93.
[5]YUN H J,JIAN G L,XUE J L.Study on EDM Machining Techniques of Polycrystalline Diamond Cutting Tool and PCD Cutting Tool’s Life[J].Advanced Materials Research,2011,265(26):309-315.
[6]SOWERS J,FANG A.Studies on the Lapping of Polycrystalline Diamond Compact(PDC)[J].Advanced Materials Research,2011,321(32):495-501.
[7]李秦峰,任成祖,张斌,等.基于砂轮径向振动主动控制的ELID内圆磨削[J].中国机械工程,2015(9):1 179-1 182.LI Q F,REN C Z,ZHANG B,et al.Internal ELID Grinding Based on Active Control of Wheel Radial Chatter[J].China Mechanical Engineering,2015(9):1 179-1 182.
[8]刘伟强,黄秀兰,文雅珊.磨削工艺对车轴表面粗糙度的影响分析[J].机床与液压,2015,43(23):98-100.LIU W Q,HUANG X L,WEN Y S.Impact Analysis of Grinding Process on Axle Surface Roughness[J].Machine Tool&Hydraulics,2015,43(23):98-100.