【作者】 岳桂勋；

【导师】 马泳涛；

【作者基本信息】 郑州大学 ， 机械制造及其自动化， 2012， 硕士

【摘要】 五轴联动数控加工在复杂曲面的零件加工中具有不可替代的优势。本文将数控加工复杂曲面的方法与齿轮齿面加工相结合,提出了采用通用五轴联动机床结构,代替传统齿面加工专用机床的构想,简化了齿轮加工机床的结构,为复杂齿面的半精加工以及精加工提供了新的方法。并以常用的螺旋锥齿轮淬硬热处理后产生的微观几何变形为例,进行相关的消除齿廓形偏差的研究。本文首先探讨了采用柱状刀具进行齿面侧刃加工时的刀位计算,分析了标准直齿齿轮副传动的啮合接触区计算方法。为了提高刀具耐用度,在刀位计算时,将切触点在刀具上的位置实现随齿面轮廓动态变化,并把刀具底刃与相邻齿廓的最小安全距离作为约束条件,得到了刀位点计算的解析解。采用UG/NX二次开发的方法,使用C语言在Visual Studio2005集成环境中进行开发刀轨udop函数的编译,将刀位点的解析解进行编译生成dll文件,并将开发的编译文件嵌入到UG/CAM加工环境中,可得到编程开发的沿轴向产生比例移动动态切触点刀轨,与UG本身CAM模块生成的刀轨相比,具有更好的灵活性。在刀位编程计算的基础上,探讨了加工齿轮时五轴联动机床的的结构形式选择。论述了双摆头、双转台等机床结构形式,并对这些机床结构加工零件的适用范围和优缺点进行了分析,确定出本文采用双转台结构机床较为合适。采用UG/Open API的编程方法,生成了加工齿面轮廓的试切刀轨。在选定的型号机床结构基础上,实现了UG/Post后处理器的配置及用于实际加工G代码的自动生成。并采用Vericut加工仿真软件,对生成的G代码进行了仿真几何验证。仿真结果表明,本文提出的加工刀轨生成方法,以及配置的机床结构,能够实现复杂齿面的数控加工。更多还原

【Abstract】 5-axis linkage Numerical Control Machining have irreplaceable advantages when manufacturing sculptured surface.The paper adopted the universal5-axis linkage machine tool structure replacing the traditional special processing equipment incorporating NC Machining with gear surface machining,and provided a method for complicated tooth profile surface semifinishing and finishing.And relevant study were made about eliminating the tooth profile deviation by taking the microgeometeric distortion of helical bevel gear after the heat treatment as an example.Firstly,the cutter location calculation of flank blade grinding finishing was discussed,and the calculation method of meshing area was analysed for standard spur gears drive.The analytical solution of cutter location point was obtained by the constraint condition of the minimum safety distance between the cutter bottom edge and adjacent tooth profile,and cutter contact point along the tooth profile changed dynamically to improve the cutter life when calculating the cutter location.The paper adopted the method of UG/NX and compiled the tool path udop function in Visual Studio2005integrated environment in C programming language,and got the compiled dll file of analytical solution.The dynamical contact point tool path was acquired to implement axial proportion variation after having embedded the dll file into the UG/CAM setting,and it was more flexible by contrast with the tool path of original UG/CAM module.The selection of5-axis linkage machine tool was discussed for the gear’s processing based on the cutter location programming.Dual-head and dual-table also other structure types were discussed,and it was analysed that of machined parts’scope of application and relative merits.The dual-table type was proper in the paper.The testing tool path for the tooth profile surface was generated by UG/Open API programming.The UG/Post postprocessor configuration was achieved for the selected machine tool type and NC code was generated automatically for the practical NC Machining.The geometry simulation verification was achieved in Vericut machining simulation software finally.The simulation result indicates,the method of tool path generation proposed in the paper and the configurated machine tool type could achieve the NC machining of complicated tooth profile surface.更多还原