切削用量对钛合金已加工表面残余应力的影响

Influence of Cutting Parameters on Titanium Alloy Finished Surface Residual Stress

为了得到切削用量对钛合金加工表面残余应力的影响,本文根据金属切削有限元分析相关理论,建立了三维斜角切削有限元模型,对钛合金Ti6Al4V的铣削加工进行了模拟分析,得到了切削速度和切削深度对工件加工表面残余应力的影响。由模拟结果得出:残余应力随切削速度的增大而逐渐增加,切削速度对加工表面残余应力的影响较大,同时随着切削速度的改变,表面残余应力层的厚度有上升趋势;残余应力在已加工表面外表面表现为拉应力,沿深度方向由拉应力逐渐过渡到压应力;切削深度对残余应力及残余应力层的影响都较小。

To get the influence of the cutting parameters on the residual stress of Ti6A14V, in this text according to the finite element analysis of metal cutting theory, the cutting process was simulated using the 3 D oblique cutting finite ele- ment model at different cutting speeds and cutting depths. The results of study showed that the cutting speed has great in- fluence on the residual stress of the surface. With the change of cutting speed, surface residual stress layer thickness has an upward trend;The surface residual stress of workpiece is tensile stress. With the increase of depth, the tensile stress is transformed to the compressive stress. While the cutting depth have little influence on the residual stress of the surface.