滚珠型单头弧面分度凸轮实体建模及加工仿真研究

Research on Modeling and Processing Simulation of Ball Type Single Head of Globoidal Indexing Cam Entity

目前对单头弧面分度凸轮实体建模有很多研究方法,大多数研究的弧面分度凸轮实体建模过程比较复杂,不仅建模周期比较长,而且实际加工周期也比较长,导致了凸轮设计的效率偏低,不能满足凸轮小批量生产的要求。对此,文章采取了滚珠型单头弧面分度凸轮实体建模的方法,通过Matlab软件选择出优良的滚珠运动规律曲线,编程曲线程序计算出运动规律曲线的对应三维坐标点,保持为文本格式后导入到三维建模软件Pro/E中,从而生成转盘上面的滚珠实际运动轨迹曲线,在运动规律曲线上画出一个圆形,尺寸等于滚珠直径,采用扫略切除命令完成弧面分度凸轮的创建,最后把弧面分度凸轮模型保存为IGES格式,导入到Mastercam软件中进行加工仿真。同时,文中与其它弧面分度凸轮建模及加工仿真进行了对比分析,对比结果显示,文中研究的凸轮不仅建模周期特别短,大约都缩短了67%左右,而且加工仿真时间也特别短,大约缩短了50%左右,因此为弧面分度凸轮的建模与加工仿真提供了参考数据。

At present, there are many research methods of single head of globoidal indexing cam modeling, entity modeling process of globoidal indexing cam is most research is more complex, not only the modeling cycle is long, but the actual processing cycle is relatively long, may lead to lower efficiency of cam design, can not meet the requirements of the cam and small batch production. Therefore, this paper adopts the meth- od of ball type single head of globoidal indexing cam modeling, through the Matlab software to select excel- lent curve ball movement rules, programming curve program calculates the motion curve of the correspond- ing 3D coordinates of points, to keep the text format and imported into 3D modeling software Pro/E, to generate the actual motion trajectory curve ball turntable the above, draw a circle in the motion curve, size is equal to the diameter of the ball bearing, using sweep command to create a complete resection of the globoidal indexing cam, and finally the globoidal indexing cam model is saved as IGES format, and impor- ted into Mastercam software for processing simulation. At the same time, this paper and other globoidal in- dexing cam modeling and Simulation of machining were analyzed. The comparison results show that this re- search not only modeling cam cycle is short, about all reduce by about 67%, and the time of machining simulation is particularly short, approximately shortened by about 50%, thus provides reference data for modeling and Simulation of machining globoidal indexing cam.