【作者】 张辉；

【导师】 刘献礼；

【作者基本信息】 哈尔滨理工大学 ， 机械制造及其自动化， 2013， 硕士

【摘要】 球头铣刀作为复杂型面零件轮廓铣削的高效率加工刀具广泛应用于精密数控加工，本文以航空航天钛合金零件的加工为例，在分析国内外有关球头铣刀的数学模型、刃磨加工、切削试验等研究现状的基础上，应用UG三维软件及相关数学理论，研究球头铣刀的整体建模，并通过二次开发技术建立球头铣刀参数化设计系统。通过相关试验证明刀具参数优化方法的可行性后，结合上述软件系统得到球头铣刀CAD模型，使用AdvantEdgeTM仿真软件对刀具铣削钛合金材料进行仿真分析，实现TC4钛合金叶轮加工的工艺优化。本文的主要研究内容为：（1）针对球头铣刀的几何结构，依据典型回转类刀具刀刃曲线的数学模型，建立球头铣刀周刃、球刃部分的等导程螺旋线及退刀槽扫描线的参数方程，分析刀具截形线的几何意义，通过数学描述的方法对各条线段进行关系约束。研究球头铣刀切削钛合金材料时，刀具各结构变量对切削状况的影响，并给出应对措施以改善刀具的切削性能。（2）使用UG三维软件建立球头铣刀的CAD模型，以该软件为平台，结合UG/Open工具、COM组件和数据库等技术建立球头铣刀参数化设计系统，自定义软件模块的系统菜单、用户交互界面、数据库结构，并对程序进行编译和链接，实现球头铣刀的快速建模，为后续的仿真分析打下基础。（3）以钛合金材料叶轮的精铣加工为例，对整体式硬质合金球头铣刀进行参数限定及刃磨制造，采用切削正交试验的方法来优化刀具的几何结构，分析刀具各个参数变量对切削过程的影响，验证球头铣刀参数优化方法的可行性。（4）结合有限元软件对钛合金材料的加工进行仿真分析，模拟球头铣刀切削过程中铣削力的变化，对刀具进行参数优化设计，实现零件加工的不同工序，刀具结构与切削用量的合理匹配，完成叶轮加工的工艺优化。更多还原

【Abstract】 Ball-end milling cutter as high efficiency process tool of complex surfacespart is widely used in precision CNC machining. this paper based on processingaerospace titanium alloy parts, in the analysis of references about mathematicalmodel, grinding machining, cutting tests of the ball-end milling cutter, with UG3D software and related mathematical theory, research the overall modeling ofthe tool, to establish the Ball-end Milling Cutter Parametric Design Systemthrough the secondary development technology.After parameter optimizationmethod has been proved to be feasible, combinated those CAD model producedby software systems and the AdvantEdgeTMsimulation software analysis toolsmilling titanium alloy materials, implement TC4titanium alloy impellermachining process optimization. The main contents of this article:(1) In view of the ball-end milling cutter geometry, based on mathematicalmodel of the typical rotating tool’s blade curve, establish parametric equation oflead helix of peripheral blade, ball blade and the undercut scan line, analysistool’s truncate lines, relationate constraints through the mathematical descriptionof each line segment. Research situation of ball-end milling cutter cuttingtitanium alloy materials, relationship of each structure variable of the tool withfailure forms, and give a solution to improve the tool cutting performance.(2) With UG3D software to build a ball-end milling cutter CAD model, inits software platform, combined UG/Open Tools, COM components and databasetechnology to establish parametric design system, self-defined the system menu,the user interface, database structure of software modules, compile and link theprogram, to achieve rapid modeling of the cutter, lay the foundation for thesubsequent simulation analysis.(3) Take the titanium alloy impeller finish milling processing as an example,design and sharpen the monolithic carbide ball-end milling cutter, usingorthogonal test method to optimize the structural parameters of the cutter, analysis tool’s each parameter variables on the influence of the cutting process,validation ball-end milling cutter parameter optimization method is feasible.(4) Combine with finite element software to analysis titanium alloyprocessing, simulate milling force changes of ball-end milling cutter cuttingprocess, realize parts processing of different process, tool structure and cuttingdosage reasonable matching, so as to realize the impeller machining processoptimization.更多还原