医用钛合金切削过程有限元仿真与试验研究

【作者】 王苏东；

【导师】 武凯；

【作者基本信息】 南京理工大学 ， 机械制造及其自动化， 2010， 硕士

【摘要】 钛合金TC4是一种综合性能优异的新型材料,在医疗、航空等领域的应用越来越广泛,但同时钛合金TC4也是一种难切削的金属材料,研究其切削过程对实际生产有着重要的现实意义。本文围绕医用钛合金(TC4)切削过程的有限元仿真和切削参数优化,主要作了以下几个方面的研究工作：1.分析了金属切削过程切削层变形理论及材料非线性、几何非线性变形理论,研究了弹塑性大变形有限元求解过程,为进行TC4切削过程有限元仿真分析奠定了基础。2.建立了基于Deform-3D有限元软件平台的TC4切削过程有限元仿真模型,对金属切削过程有限元仿真关键技术进行了研究。3.通过仿真,研究了TC4切削过程中不同切削参数对切削力、切削温度的影响规律。4.进行了TC4切削试验,分析了切削速度、每齿进给量与表面粗糙度之间的关系。5.优化了TC4切削加工工艺参数,并通过了实际生产验证。本文的研究对提高医用钛合金零件加工效率和加工质量,实现其高效精密铣削加工,促进医用钛合金材料的推广应用具有重要的意义。更多还原

【Abstract】 Titanium alloy TC4 is a kind of new and reliable performance material which has been widely applied in medical, aviation fields and so on. But it is also a kind of material difficult to cut, so studying the cutting theory and cutting process of TC4 has an important and practical meaning. The main works of this paper focus on the finite element simulation of cutting process and cutting parameters optimization of the medical titanium alloy (TC4). The detailed contents are as follows:1. Analyzed the metal-cutting deformation theories including cutting-layer deformation theory, material nonlinearity deformation theory and geometric non-linear deformation theory. Studied the elastic-plastic large deformation finite element solution process. All the works made a preparation for the finite element simulation of TC4 cutting process.2. Built a finite element simulation model of TC4 cutting process based on Deform-3D finite element software platform and the key technologies about the finite element simulation of metal cutting process were studied.3. By simulations, studied the influences of different cutting parameters on the cutting force and cutting temperature in the cutting process.4. Analyzed the relationships between the surface roughness and the cutting speed, feed rate per tooth through TC4 cutting tests.5. Optimized cutting parameters of TC4 and it was verified by actual production.The researches of this paper have an important significance for promoting the extensive application and high efficiency machining of the medical titanium alloy.更多还原