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Virtual Machining of High Speed Mechining and Its Application to Machining System

高速加工虚拟加工及其在加工系统中的应用

基本信息

批准号：
07455061
负责人：
OBIKAWA Toshiyuki
金额：
$ 4.22万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

High speed machining is one of promising technologies that will yield high economical production and high quality of the machined elements. Moreover, it is expected as a technology which can finish the product without the processes of grinding or polishing. However, high speed machining may be effective only in some particular areas of machining. No strategy for exploring such areas has been proposed and found. Thus the performances of high speed machining should be effectively evaluated by the virtual machining with the aid of computer simulation, which has a potential for optimizing machining operations.In this research the various types of modiling of machining with different tools and chip formations, which caused by different combinations of work materials and cutting conditions, were first developed for clarifying the machining phenomena using finite element methods with different formations and finite difference method. The chip formations considered are continuous, discontinuous and serrated. The types of tools are flat and grooved in two dimensional machining, while a single point tool and an endmill are considered in three dimensional cutting.Next the virtual machining methods are applied to the optimization of tool geometry. In this application the influences of tool geometry on tool wear, tool breakage and chip control were clarified by using cutting temperature, stresses on the tool face, tool deformation, and chip deformation and breakage. Then the optimized tool geometry for given cutting conditions and the optimized cutting conditions for given tool geometry were determined. The integration of cutting condition monitoring and cutting operation planning through the virtual machining method was investigated.

高速加工是一种经济高效、加工质量高的加工技术。此外，它还有望成为一种无需研磨或抛光过程即可完成产品加工的技术。然而，高速加工可能只在某些特定的加工领域有效。目前还没有提出和发现探索这类地区的战略。因此，在计算机仿真的辅助下，通过虚拟加工来有效地评估高速加工的性能，具有优化加工操作的潜力。在本研究中，首先建立了不同刀具和切屑形状的各种类型的加工模型，这些模型是由不同的加工材料和加工条件组合而引起的，以澄清不同形状的有限元方法和有限差分方法的加工现象。所考虑的切屑形态有连续、不连续和锯齿状。在二维加工中刀具类型为平面和槽型，在三维加工中考虑单点刀具和立铣刀，然后将虚拟加工方法应用于刀具几何形状的优化。在这一应用中，刀具几何形状对刀具磨损、刀具破损和切屑控制的影响通过刀具温度、刀具表面应力、刀具变形和切屑变形和破损来阐明。在此基础上，确定了给定切削条件下的最优刀具几何形状和给定刀具几何形状下的最佳切削条件。研究了利用虚拟加工方法实现加工状态监测与加工作业规划的集成。