CNMG车刀槽型的优化
2019-11-15
作者：李凌祥1，姜恩来1，万泉2，何耿煌1，臧文海1
单位：1厦门金鹭特种合金有限公司；2哈尔滨理工大学
摘要：针对金属材料在切削加工时断屑不及时而影响加工效率、破坏工件已加工表面完整性、降低刀具的使用寿命等问题，基于槽型刀具备改善刀具切削性能的优势，以优化车刀三维复杂槽型为目的，分析断屑机理及槽型设计准则，基于数学模型对槽型进行优化设计，并以切削力及切削温度作为评价指标进行三维复杂槽型车刀切削高温合金的有限元切削仿真分析。仿真优化槽型后的车刀车削力及车削温度均小于未优化的槽型车刀，表明槽型优化有效改善了车刀的切削性能，证明槽型优化的可靠性及准确性。优化槽型后的切削参数优选为：vc=25m/min，fz=0.2mm/r，ap=1.6mm。
关键词：CNMG车刀；槽型优化；GH4169高温合金；断屑机理
中图分类号：TG132.3+2；TG712文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.11.011
Slot Optimization of CNMG Turning Tool
Li Lingxiang，Jiang Enlai，Wan Quan，He Genghuang，Zhang Wenhai
Abstract:In view of the problems that chip breaking does not occur in time during the metal cutting，which affects the efficiency of automatic processing，destroys the surface integrity of the workpiece and reduces the service life of the tool. Based on the advantages of slot cutter in improving the cutting performance of the tool，this paper aims at optimizing the threedimensional complex slot of turning tool，analyzing the chip breaking mechanism and slot design criteria， establishing a mathematical model，and designing the slot of the turning tool.Cutting force and cutting temperature are used as evaluation indexes to carry out finite element simulation analysis of cutting superalloy with 3D complex groove turning tool.The simulation results show that the milling force and temperature of optimized groove turning tool are less than those of nonoptimized groove turning tool.It shows that groove optimization effectively improves the cutting performance of turning tool and proves the reliability and accuracy of groove optimization.The cutting parameters of optimized groove are optimized as follows:vc=25m/min，fz=0.2mm/r，ap=1.6mm.
Keywords:CNMG turning tool；groove optimization；GH4169 superalloy；chip breaking mechanism