开式数控回转头压力机机身动态响应的研究  

Dynamic Response Study to the Computer Numerical Control C-Frame Turret Punch Press

作　　者：梁森[1] 陈花玲[1] 黄协清[1] 陈天宁[1] 

机构地区：[1]西安交通大学机械工程学院,西安710049

出　　处：《西安交通大学学报》2003年第7期742-746,共5页Journal of Xi'an Jiaotong University

摘　　要：针对开式数控回转头压力机机身传统设计方法的不足,建立了打击载荷的理论模型,用有限元法完成了J92K 25型机身的动态分析,并进行了实验验证,得到了在静态分析中没有出现的重要结论:机身动应力的峰值交替出现在曲轴孔的顶点、机身喉口下过波圆角处及前后地脚螺钉孔附近,在振动过程中,前后地脚螺钉孔处的应力有时会更高.由于该机不会发生共振,所以连续行程次数还可以进一步提高 打击中心沿x,z方向均有一定的错移,其中在x方向的错移最大.最后,提出了控制最大动应力、打击中心在x和z方向错移及机身动态垂直变形的动态设计新方法,这对高速度、高精度、受冲击载荷机床的动态设计有重要意义.To overcome the drawback of the traditional design method for a computer numerical control(CNC) Cframe turret punch press, a theoretical model of impulsive load that is exerted on the press was set up. The dynamic analysis of the type J92 K25 frame was completed by finite element method and some computed results were verified by experiments. The important results that couald not be obtained in static analysis were gained by means of numerical simulation. It is found that the dynamic stress peaks appear at the top of crankshaft hole, at the lower fillet of throat and at the foundation bolt holes, alternately. Sometimes the stress in the foundation bolt holes may be the highest. It can be discovered that there are some displacement offsets in the x and z directions at the punch center and the x direction offset is larger. Finally a new dynamic design method of the frame is provided in order to control the maximal dynamic stress, the offset of punch center in the x and z directions, and the vertical deformation. The new dynamic design mothod may have significant reference for the design of a high speed and precise machine tool suffered impulsive loads.

关 键 词：有限元法 动态设计 回转头压力机 

分 类 号：TG385[金属学及工艺—金属压力加工]