新型点磨削砂轮磨削表面/亚表面质量研究
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摘要
区别于传统外圆磨削,点磨削加工砂轮轴线与工件轴线不平行,而是存在倾斜角α.设计了一种带有粗磨区倾角θ的新型点磨削砂轮,这种砂轮具有磨除率大、磨削表面粗糙度小等优点.由于α和θ的存在,改变了砂轮-工件接触区的几何关系,磨削表面/亚表面质量也随之发生变化.采用制备的新型砂轮,磨削材料为QT700的工件,检测工件表面/亚表面的金相组织、加工硬化和残余应力.分析α,θ以及磨削参数对表面/亚表面质量的影响规律,给出获得最优表面/亚表面质量的工艺参数,可知新型点磨削砂轮能够提高工件表面/亚表面质量.
Different from the traditional cylindrical grinding,the axis of a grinding wheel is not parallel to the workpiece axis in the point grinding process,but rotates at an inclining angle α. A novel grinding wheel with angle θ is proposed,which is featured by high grinding rate and small surface roughness. Because of α and θ,the contact between the grinding wheel and workpiece has been changed,and the surface/subsurface quality is also changed. The novel wheels with different angles θ are used to grind QT700 workpieces. Then,the metallographic structure,work hardening and residual stress of the workpiece surface/subsurface are tested. The influence of α,θ and grinding parameters on the surface/subsurface quality is analyzed,and the process parameters for optimal surface/subsurface quality are obtained. In conclusion,the novel point grinding wheel can improve the surface/subsurface quality of workpieces.
Different from the traditional cylindrical grinding,the axis of a grinding wheel is not parallel to the workpiece axis in the point grinding process,but rotates at an inclining angle α. A novel grinding wheel with angle θ is proposed,which is featured by high grinding rate and small surface roughness. Because of α and θ,the contact between the grinding wheel and workpiece has been changed,and the surface/subsurface quality is also changed. The novel wheels with different angles θ are used to grind QT700 workpieces. Then,the metallographic structure,work hardening and residual stress of the workpiece surface/subsurface are tested. The influence of α,θ and grinding parameters on the surface/subsurface quality is analyzed,and the process parameters for optimal surface/subsurface quality are obtained. In conclusion,the novel point grinding wheel can improve the surface/subsurface quality of workpieces.
引文
[1] Wang X W,Guo P Q,Zhao H D,et al. Review of quickpoint grinding technology[J]. Key Engineering Materials,2012, 499:295-300.
[2] Gong Y D,Yin G Q,Wen X L, et al. Research on simulation and experiment for surface topography machined by a novel point grinding wheel[J]. Journal of Mechanical Science and Technology,2015,29(10):4367-4378.
[3]尹国强,巩亚东,温雪龙,等.新型点磨削砂轮磨削力模型及试验研究[J].机械工程学报, 2016,52(9):193-200.(Yin Guo-qiang,Gong Ya-dong,Wen Xue-long,et al.Modeling and experimental investigations on point grinding force for novel point grinding wheel[J]. Journal of Mechanical Engineering,2016,52(9):193-200.)
[4] Chakrabarti S,Paul S. Numerical modelling of surface topography in super abrasive grinding[J]. International Journal of Advanced Manufacturing Technology,2008,39(1/2):29-38.
[5] Fricker D C,Pearce T R A,Harrison A J L. Predicting the occurrence of grind hardening in cubic boron nitride grinding of crankshaft steel[J]. Journal of Engineering Manufacture,2004, 218(10):1339-1356.
[6] Umbrello D,Pu Z,Caruso S,et al. The effects of cryogenic cooling on surface integrity in hard machining[J]. Procedia Engineering,2011,19(3):371-376.
[7]杜随更,姜哲,张定华,等. GH4169合金磨削表面塑性变形层的微观结构[J].机械工程学报,2015,51(12):63-68.(Du Sui-geng, Jiang Zhe, Zhang Ding-hua, et al.Microstructure of plastic deformation layer on grinding surface of GH4169 alloy[J]. Journal of Mechanical Engineering,2015,51(12):63-68.)
[8]黄新春,张定华,姚倡锋,等.镍基高温合金GH4169磨削参数对表面完整性影响[J].航空动力学报,2013,28(3):621-628.(Huang Xin-chun,Zhang Ding-hua,Yao Chang-feng,et al.Effects of grinding parameters on surface integrity of GH4169nickel-based superalloy[J]. Journal of Aerospace Power,2013, 28(3):621-628.)
[9] Gong Y D,Yin G Q,Wang C,et al. Study on the effect of coarse grinding area slope angle on surface quality in point grinding[J]. Advanced Materials Research,2013,797:118-122.
[10] Tonissen S,Klocke F,Feldhaus B,et al. Residual stress prediction in quick point grinding[J]. Production Engineering,2012,6(3):243-249.
[2] Gong Y D,Yin G Q,Wen X L, et al. Research on simulation and experiment for surface topography machined by a novel point grinding wheel[J]. Journal of Mechanical Science and Technology,2015,29(10):4367-4378.
[3]尹国强,巩亚东,温雪龙,等.新型点磨削砂轮磨削力模型及试验研究[J].机械工程学报, 2016,52(9):193-200.(Yin Guo-qiang,Gong Ya-dong,Wen Xue-long,et al.Modeling and experimental investigations on point grinding force for novel point grinding wheel[J]. Journal of Mechanical Engineering,2016,52(9):193-200.)
[4] Chakrabarti S,Paul S. Numerical modelling of surface topography in super abrasive grinding[J]. International Journal of Advanced Manufacturing Technology,2008,39(1/2):29-38.
[5] Fricker D C,Pearce T R A,Harrison A J L. Predicting the occurrence of grind hardening in cubic boron nitride grinding of crankshaft steel[J]. Journal of Engineering Manufacture,2004, 218(10):1339-1356.
[6] Umbrello D,Pu Z,Caruso S,et al. The effects of cryogenic cooling on surface integrity in hard machining[J]. Procedia Engineering,2011,19(3):371-376.
[7]杜随更,姜哲,张定华,等. GH4169合金磨削表面塑性变形层的微观结构[J].机械工程学报,2015,51(12):63-68.(Du Sui-geng, Jiang Zhe, Zhang Ding-hua, et al.Microstructure of plastic deformation layer on grinding surface of GH4169 alloy[J]. Journal of Mechanical Engineering,2015,51(12):63-68.)
[8]黄新春,张定华,姚倡锋,等.镍基高温合金GH4169磨削参数对表面完整性影响[J].航空动力学报,2013,28(3):621-628.(Huang Xin-chun,Zhang Ding-hua,Yao Chang-feng,et al.Effects of grinding parameters on surface integrity of GH4169nickel-based superalloy[J]. Journal of Aerospace Power,2013, 28(3):621-628.)
[9] Gong Y D,Yin G Q,Wang C,et al. Study on the effect of coarse grinding area slope angle on surface quality in point grinding[J]. Advanced Materials Research,2013,797:118-122.
[10] Tonissen S,Klocke F,Feldhaus B,et al. Residual stress prediction in quick point grinding[J]. Production Engineering,2012,6(3):243-249.