热力耦合下轴向旋转热管砂轮的强度分析  

Strength analysis of axial rotating heat pipe grinding wheel under thermo-mechanical coupling

作　　者：姜华飞 陈佳佳 傅玉灿[2] 徐幼林[1] JIANG Huafei;CHEN Jiajia;FU Yucan;XU Youlin(College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China;College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China)

机构地区：[1]南京林业大学机械电子工程学院,南京210037 [2]南京航空航天大学机电学院,南京210016

出　　处：《金刚石与磨料磨具工程》2021年第2期9-16,共8页Diamond & Abrasives Engineering

基　　金：国家自然科学基金资助项目(51905275);江苏省基础研究计划(自然科学基金)资助项目(BK20190752);江苏省高等学校自然科学研究面上项目(19KJB460020)。

摘　　要：为研究高效成型磨削加工过程中轴向旋转热管砂轮(heat pipe grinding wheel,HPGW)的基体强度,且考虑到HPGW强化换热的特点,使用ANSYS workbench对热力耦合下的HPGW进行有限元分析。得到30000 r/min转速下,HPGW的最大等效应力为26.481 MPa,最大变形量为0.0148 mm,均符合许用要求。分别探讨不同磨削用量、基体材料和工件材料条件下,转速对最大等效应力和变形量的影响。结果表明:同一进给速度和切深下,随着转速提高,HPGW的最大等效应力先降后升,最大变形量则不断降低。基体材料为2Cr13的HPGW采用缓进深切工艺磨削钛合金,可以最大程度地减小砂轮的应力和变形量。本条件下的最佳工艺参数为砂轮转速n=10000 r/min、工件进给速度vw=80 mm/min和磨削切深ap=0.10 mm。To study the matrix strength of the axial rotating heat pipe grinding wheel(HPGW)in the process of high efficiency profile grinding,and considering that HPGW has the characteristics of heat transfer enhancement,ANSYS workbench was used to perform finite element analysis on the HPGW under the thermo-mechanical coupling.At the rotating speed of 30000 r/min,the maximum equivalent stress of HPGW is 26.481 MPa,and the maximum deformation is 0.0148 mm,all of which meet the allowable requirements.The influence of rotating speed on maximum equivalent stress and deformation under the conditions of different grinding parameters,matrix materials and workpiece materials was discussed respectively.The results show that at the same feed rate and cutting depth,with the increase of the rotating speed,the maximum equivalent stress of HPGW decreases first and then increases,and the maximum deformation decreases continuously.HPGW with 2Cr13 as the matrix material adopts the creep feed deep grinding process to grind the titanium alloy,which can minimize the stress and deformation.The best parameters in this condition was rotating speed of n=10000 r/min,workpiece speed of vw=80 mm/min,and cutting depth of ap=0.10 mm.

关 键 词：热管砂轮 热力耦合 有限元分析 强度校核 应力和变形量 

分 类 号：TG74[金属学及工艺—刀具与模具] TG580