20CrMnTi钢喷丸参数的研究
|
摘要
为延长20Cr MnTi钢疲劳裂纹的萌生寿命,对20CrMnTi钢进行了超声喷丸加工的研究,分析了弹丸半径对喷丸效果的影响。通过对喷丸动态过程运用ANSYS仿真软件进行模拟分析,从而得到弹丸半径与喷丸坑深、最大残留压力以及压力层深之间关系曲线。根据喷丸理论,设计了一套超声喷丸实验设备,运用该设备,探究了实验条件下丸料半径不同时,加工效果的差异。最后通过研究发现:一方面,丸料半径增加时,喷丸坑深和应力层深类似于线性变化趋势。另一方面,最大残留压力增加趋缓。
In order to prolong the initiation life of 20 CrMnTi steel's fatigue crack,the ultrasonic shot blasting of 20 CrMnTi steel was carried out,and the effect of the projectile radius on the shot blasting effect was analyzed.Firstly,the dynamic process of the shot blasting was simulated by using ANSYS simulation software to obtain the relation curve between the projectile radius and the depth of the shot hole,the maximum residual pressure and the depth of the pressure layer.Secondly,according to the theory of shot blast,a set of ultrasonic shot blast test equipment was designed,which was used to explore the difference of machining effect when the different radius of pills was used under experimental conditions.Finally,it was found that,on the one hand,when the radius of the pellet increased,the depth of the shot hole and stress layer were similar to the linear change trend. On the other hand,the maximum residual pressure increased slowly.
In order to prolong the initiation life of 20 CrMnTi steel's fatigue crack,the ultrasonic shot blasting of 20 CrMnTi steel was carried out,and the effect of the projectile radius on the shot blasting effect was analyzed.Firstly,the dynamic process of the shot blasting was simulated by using ANSYS simulation software to obtain the relation curve between the projectile radius and the depth of the shot hole,the maximum residual pressure and the depth of the pressure layer.Secondly,according to the theory of shot blast,a set of ultrasonic shot blast test equipment was designed,which was used to explore the difference of machining effect when the different radius of pills was used under experimental conditions.Finally,it was found that,on the one hand,when the radius of the pellet increased,the depth of the shot hole and stress layer were similar to the linear change trend. On the other hand,the maximum residual pressure increased slowly.
引文
[1]赵韩,吴其林.国内齿轮研究现状及问题研究[J].机械工程学报,2013,49(19):11-20.(Zhao Han,Wu Qi-lin.Research status and problems of domestic gear research[J].Journal of Mechanical Engineering,2013,49(19):11-20.)
[2]杨文龙.20CrMnTi硬齿面齿轮弯曲疲劳试验分析[J].机械管理开发,2012,(2):56-57(Yang Wen-long.Analysis of bending fatigue test of 20CrMnTi hard tooth surface gear[J].Mechanical Management Development,2012(2):56-57.)
[3]Schiffner,K,Droste.Gen.Heling.Simulation of residual stresses by shot peening[J].Computers and Structures,1999(72):329-340.
[4]吉春和.前混合磨料水射流喷丸强化技术的射流参数[J].煤矿机电,2009(1):82-84.(Ji Chun-he.The efflux parameters of the pre-mixed abrasive water jet shot strengthening technique[J].Coal mine machinery,2009(1):82-84.)
[5]Meguid S A,Klair M S.An examination of the relevance of Co-indentation studies to incomplete coverage in shot-peening using the finite-element method[J].J Mech Working Technol,1985,11(1):87-104.
[6]岳小兵,龙源.高速弹丸侵彻靶板能力及影响因素的数值研究[J].解放军理工大学学报:自然科学学报,2002,3(2):45-48.(Yue Xiao-bing,Long Yuan.Research on the ability and influence factors of high speed projectile penetrating target plate[J].Journal of PLA University of Science and Technology:Journal of Natural Science,2002,3(2):45-48.)
[7]林莉,支旭东,范峰.Q235B钢Johnson-Cook模型参数的确定[J].振动与冲击,2014,33(9):153-156(Lin Li,Zhi Xu-dong,Fan Feng.Q235B steel Johnson-Cook model parameter determination[J].Vibration and Impact,2014,33(9):153-156.)
[8]张小坡,十全,王广彦.基于LS-DYNA的圆柱形破片侵彻靶板有限元分析[J].科学技术与工程,2007,23(7):6004-6007.(Zhang Xiao-bo,Shi Quan,Wang Guang-yan.Finite element analysis of a cylindrical fragment penetration target plate based on ls-dyna[J].Science and Technology and Engineering,2007,23(7):6004-6007.)
[2]杨文龙.20CrMnTi硬齿面齿轮弯曲疲劳试验分析[J].机械管理开发,2012,(2):56-57(Yang Wen-long.Analysis of bending fatigue test of 20CrMnTi hard tooth surface gear[J].Mechanical Management Development,2012(2):56-57.)
[3]Schiffner,K,Droste.Gen.Heling.Simulation of residual stresses by shot peening[J].Computers and Structures,1999(72):329-340.
[4]吉春和.前混合磨料水射流喷丸强化技术的射流参数[J].煤矿机电,2009(1):82-84.(Ji Chun-he.The efflux parameters of the pre-mixed abrasive water jet shot strengthening technique[J].Coal mine machinery,2009(1):82-84.)
[5]Meguid S A,Klair M S.An examination of the relevance of Co-indentation studies to incomplete coverage in shot-peening using the finite-element method[J].J Mech Working Technol,1985,11(1):87-104.
[6]岳小兵,龙源.高速弹丸侵彻靶板能力及影响因素的数值研究[J].解放军理工大学学报:自然科学学报,2002,3(2):45-48.(Yue Xiao-bing,Long Yuan.Research on the ability and influence factors of high speed projectile penetrating target plate[J].Journal of PLA University of Science and Technology:Journal of Natural Science,2002,3(2):45-48.)
[7]林莉,支旭东,范峰.Q235B钢Johnson-Cook模型参数的确定[J].振动与冲击,2014,33(9):153-156(Lin Li,Zhi Xu-dong,Fan Feng.Q235B steel Johnson-Cook model parameter determination[J].Vibration and Impact,2014,33(9):153-156.)
[8]张小坡,十全,王广彦.基于LS-DYNA的圆柱形破片侵彻靶板有限元分析[J].科学技术与工程,2007,23(7):6004-6007.(Zhang Xiao-bo,Shi Quan,Wang Guang-yan.Finite element analysis of a cylindrical fragment penetration target plate based on ls-dyna[J].Science and Technology and Engineering,2007,23(7):6004-6007.)