| A globoidal cam mechanisim has some advantages of short transmission chain,high precision, smooth movement, reliable translocation, unrestricted ratio of translocation and the idle time, etc. So it has had a widespread availability in the fields such as NC machines, automatic production line, etc. However, the complex structure of globoidal cams makes it very difficult to manufacture. Presently, compared with foreign like products, the globoidal cams made in China have some drawbacks such as bad bearing capacity, unreliable performance, short service life, etc.. The lag manufacturing process has seriously impact on the domestic globoidal cam product quality, efficiency and application. Therefore, deep research on multi-axes CNC machining simulation for globoidal cams has important practical significance for rapid, efficient, and high-quality development and production. For this reason, based on UG&VERICUT, in order to realize the simulation verification of multi-axes CNC machining with the generation method and the tool offset method, globoidal cam profile surface equations for different type rollers are built and the multi-axes CNC machining technology and simulation program for globoidal cams are established in this paper. The main research works are as follows:1) The present situation and problems about the design and manufacture theory of the globoidal cam mechanisms have been summarized. Globoidal cam profile surface equations of different type rollers are built and the multi-axes NC machining technology of the generation method and the tool offset method are proposed.2) Globoidal cam multi-axes virtual machining simulation environment is built. Based on UG & VERICUT, the 3D solid models of the relevant parts and components are created including globoidal cam, roughcast, cutlery, simplify model of DMU80T five-axis machining center,etc..3) The multi-axes CNC automatic programming of machining different type rollers with generation method and tool offset method are accomplished. Specifically, tool path planning is finished and cutter location file is geerated by applying UG software. Then the postprocessor of DMU80T five-axis machining center is by customized through UG/Post Builder. The generated NC program is available for machining simulation verification.4)The simulation verification for multi-axes NC program of machining globoidal cams is realized with generation method and tool offset method. Applying VERICUT software, the multi-axes NC program simulation for different type rollers with generation method and tool offset method are realized. Whether the tool paths and processing parameters are reasonable or not and whether interference or gouge phenomenon is exited or not in machining process can all be checked. Then the multi-axes NC program can be effective verified before machining the globoidal cam practically.In conclusion, in order to achieve rapid, efficient, and high-quality exploitation and production for globoidal cams, this paper provides an effective platform for multi-axes CNC programming and machining simulation for Globoidal cams based on UG & VERICUT. Also the multi-axes CNC machining technique for globoidal cams can be more improved. |
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