The3D Tolerance Technology Application Research In Machine Tool Spindle System

In recent years as the revitalization of national equipment manufacturing industry, the market for mechanical products processing machine tool has a higher quality requirements, especially need for high precision NC machine tool.Combined with market demand, KunMing machine tool plant in ShenJi group has developed the domestic highest precision THM series NC boring machine, the model at the beginning of the machine tool in the design of fully considering the strength of machine tool structure and function, but according to after-sales customer service feedback about the stability of the machine tool and machining accuracy still needs to be improved. Based on this problem, this paper aim at the machine tool parts of tolerance design and distribution effect on the performance of whole machine assembly. Machine tool spindle box Is the core part of the machine tool system, it has many constituent parts, complexity assembly and contains a large amount of information about size tolerance. This pape’s research target is the model of machine tool spindle box system, about this target, this paper carried out the following several aspects:Compared with the traditional method of tolerance design and the Computer Aided3D Tolerance theory method we get:Computer Aided3D Tolerance technology to research modern mechanical product, test product and the market reaction are have huge advantage than the traditional method.Combined with the designer care about the machining precision of machine tool, I use the technology of Computer Aided3D Tolerance for machine tool spindle system. First to do a evaluation for this experience of tolerance design and then find out a greater influence factors on the precision of the spindle system, for the following size tolerance adjustment and the optimization.Combining the real working condition of machine tool, under affected by real factor to search the machine tool spindle system key size, sensitivity, contribution and the effect of final assembling machine tool spindle system, to do a tolerance optimization to achieve a foundation for the further research in the real environment.Combining with the machining cost in different size tolerance. On the premise of achieve the assembly precision, how to make a better size tolerance in order to achieve this goal.In this paper, consider the design and the demand of the actual product, Ⅰ has worked the above research work. The result is not only supply a reference about better arrangement of tolerance but also in improving the precision of the product, making the manufacturing cost lower and so on. At the same time, the research of the theory and method can offer a valuable reference for the similar mechanical design.