The Design Of CNC Rotary Table With Globoidal Cam Driving And The Virtual Machining Simulation Of Its Core Part

This article is based on a XH713A of three-axis machining center, as only the x, y, z, no CNC Rotary worktable, in the use, processing of the part types are very limited, in order to meet to be able to process more complex parts, so as to improve the machine, adding a CNC rotary table, making it a four-axis machining centers, expanded its processing capacity. But given the current domestic CNC rotary table drive mechanism used traditional worm gear worm, in use fully exposed their lack of rigidity, low bearing capacity, and low accuracy, after full consideration of all factors, decided to provide the NC rotary table currently is widely used in all of the core transmission components using high speed and precision of the mechanical transmission device-Globoidal cam. CNC rotary table indexing accuracy and meet the requirements for continuous indexing of CNC rotary table, this new type of continuous indexing Globoidal cams. However, it of structure of complexity, design and manufacturing very difficulties, for, this to improve arc surface cam of processing quality and in machine Shang of precision processing of achieved, established continuous points degrees arc surface cam more axis NC processing technology, established has continuous points degrees arc surface cam more axis NC processing simulation programme, last based on VERICUT software achieved has on continuous points degrees arc surface cam common of generating law and knife bit compensation law of more axis NC processing program simulation test. Specific studies are as follows:1) summarizes the core part of NC rotary table classification and work characteristics and advantages of the Globoidal cam, analysis of the domestic and foreign research on the Globoidal cam, and consider establishing a suitable for CNC rotary table of the core part of Globoid cam type.2) taking into account the processing center in all directions of travel restrictions, put forward a feasible solution, on this basis, select the motor type, distribution of transmission ratio and various parts of the CNC Simulator design and calculation for parameter and three-dimensional modeling based on UG NX6.0.3) for continuous points degrees arc surface cam of work profile surface is space not exhibition surfaces, this and using UG powerful of II times development features, through using UG/Open GRIP language for programming, completed has continuous points degrees arc surface cam of three dimensional built die, and established and of meshing transmission of transmission disc model, and for has Assembly mode Xia of interference check, easy timely found design defects, while using ANSYS Workbench software on continuous points degrees arc surface cam body for has statics analysis.4) based on the machining of Globoidal cam manufactured, analysis of Globoidal cam machining methods, and compared to each other, use UG/OPEN GRIP tool to achieve a four-spindle, five-axis tool coordinates and tool axis vector extraction. And post processors based on UG/Poster custom DMU80T Builder, the cutter had been dealt with after the NC program. Ultimate VERICUT-based realization of multi-axis NC machining of Globoidal indexing cam mechanism with emulation.