热力耦合下轴向旋转热管砂轮的强度分析

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30 000 r/min转速下,HPGW的最大等效应力为26.481 MPa,最大变形量为0....

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

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 30 000 r/min, the maximum equivalent stress of HPGW is 26.481 MPa, and the maximum deformation is 0.014 8 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=10 000 r/min, workpiece speed of v_w=80 mm/min, and cutting depth of a_p=0.10 mm.