20Cr钢的干切削性能研究
2018-07-16
岳启斌，何辉波，李华英，张显银，李渊明，江雪
西南大学
摘要：选用TiN涂层YT15刀具和与之几何参数相同的未涂层YT15、YW2硬质合金刀具，利用单因素控制变量法改变切削用量参数对20Cr钢进行干切削试验，得到了三种刀具的切削试验结果，并对切削温度、切削力与切削用量之间的规律进行分析。在Deform3D软件中建立20Cr钢的材料模型，对其切削过程进行仿真试验，比较并分析仿真值与试验值。结果表明：影响切削力的最大因素是背吃刀量，其次是进给量和切削速度；而影响切削温度的最大因素是切削速度，其次是进给量和背吃刀量；TiN涂层能够有效降低切削过程中产生的切削力和切削温度；切削力仿真结果与试验数据的误差在2.1%-11.8%之间，验证了用有限元仿真软件对20Cr钢干切削切削力的预测是可行的。
关键词：20Cr钢；切削力；切削温度；切削用量
中图分类号：TG712；TH142.1文献标志码：A
Study on Machinability of 20Cr Steel in Dry Turning
Yue Qibin，He Huibo，Li Huaying，Zhang Xianyin，Li Yuanming，Jiang Xue
Abstract:A study on the dry turning process of 20Cr steel on the CA6140A lathe is carried out by using TiN coating YT15 tool and with the same geometric parameters of uncoated YT15 and YW2 cemented carbide tool.The influences of the three cutting parameters on cutting force and cutting temperature are investigated and the cutting test results of the three different cutting tools are obtained.Then the threedimensional finite element simulation software—Deform 3D is used to simulate the dry turning process of 20Cr steel.The simulation results of cutting force are compared with the previous dry turning test results.The analysis demonstrates that the greatest influence on the cutting force of 20Cr steel is cutting depth，followed by feeding rate and cutting speed.
The greatest influence on the cutting temperature is cutting speed，followed by feeding rate and cutting depth.The TiN coating can effectively reduce the cutting force and cutting temperature.The error between the simulation results of the cutting force and the test results of dry turning is in 2.1%-11.8%.It is proved that by using the finite element simulation software is feasible to predict the cutting force of the 20Cr steel.
Keywords:20Cr steel；cutting force；cutting temperature；cutting parameter