Multi Spindle System Design Of CNC Machining Center

Along with the development of science and technology, China is also moving from the big manufacturing country to powerful manufacturing country in the world, CNC machine tools in the domestic application is also gradually popularized. With the domestic labor costs increased year after year. Improve the efficiency of machine tool production to improve production efficiency, Reducing production cost is one of the key. CNC machine is one of the important ways to improve the production efficiency of CNC machine tools. And it is feasible to design and improve the general numerical control machine tool, and it has become a new market with great potential. Based on the school enterprise cooperation, Kohler(Nanchang Branch) of Taizhong precision machine VMC-850 L machining center spindle design research.At first, Based on the investigation and analysis of the existing multi spindle design, the technical parameters of the original equipment are analyzed, And combined with the technical indicators of the project, the overall design scheme is determined.Then, on the basis of the calculation and analysis of the cutting force and the cutting power of the main shaft, the design parameters are combined. Primary electric spindle type and of the motorized spindle and main technical parameters of design and verification, including the average diameter of the spindle outer circle, inner hole, front overhang, spindle bearing span. Check the static stiffness of the spindle, can meet the use requirements. The types, arrangement and lubrication of the main shaft bearing are analyzed and selected. The lubrication and cooling system of the multi spindle lubrication system is designed, and the lubrication and cooling of the 4 main shafts are realized by the design of the oil separator. The spindle connecting seat and the supporting seat is designed, and the harmonic response modal analysis of the spindle bearing base is carried out by using the ANSYS finite element software, According to the first six order vibration mode and natural frequency, the 1 order natural frequency is about 0, the resonance will not occur.The main circuit and control circuit of the main circuit are designed for the electric servo system. The speed regulating range of the main shaft is increased by using the frequency converter and the three-phase motor. Increase the spindle frequency control system, the design of Moudbus485 communication MCGS touch screen and 4 sets of delta VDF series inverter connection. Achieve visual control, frequency conversion control, spindle fault display, to achieving 4 sets of spindle function "one button to start" and "one key to stop".In the analysis of the characteristics of machining parts based design 4 sets of tools of fixture, The method of “The two props to clip and one prop up the work piece positioning”, to ensure the positioning accuracy.Product design is completed by the United States, Kohler(Nanchang branch), to meet the design requirements.