基于制造特征的軸類零件數(shù)控工藝技術(shù)研究
[Abstract]:With the development of global knowledge economy and computer information technology, the manufacturing industry with NC machining as its core occupies an important position in the competition of comprehensive national strength. On the basis of traditional machining, NC machining technology is formed by effective combination of NC technology and CAD/CAPP/CAM technology. Compared with the traditional processing technology, it has great advantages and has become an important processing technology in contemporary manufacturing. Based on the research of CNC technology for shaft parts, this paper explores the solutions of some key problems in NC process planning, and the research work has important practical significance. Based on the enterprise's goal of high efficiency and high quality machining, this paper takes shaft parts as the research object, carries on the numerical control machining technology research: adopts the rule-based feature recognition strategy, The recognition and extraction of parts manufacturing features are realized. According to the current situation of process planning in CAPP system, this paper studies the process of automatic design, including the design of process knowledge base and process characteristic section. Parameter definition and flow definition, etc.: after analyzing the machining process and the generation of machining path of shaft parts, the abstract shaft model in this paper is taken as an object. The computer aided machining and NC program generation are carried out by using the CAM function of UG. In order to verify the correctness of the NC program, the virtual machine bed is established based on the prototype of the NC machine tool, and the feed speed of the program is optimized. Finally, the part machining program is simulated and verified. The analysis of examples shows that: (1) the rule-based feature recognition strategy can not only efficiently and accurately extract the feature of the parts, but also take the machining sequence of the parts into account, and provide information support for the subsequent process planning of the parts; (2) the parameterized CAPP system can effectively overcome the disadvantages of long period, large amount of work repetition and confused management in the process of traditional process planning. (3) the virtual machining method can be used to find out the errors in the parts processing program, to correct and optimize the NC program, and to replace the "trial cutting" in actual production, and to reduce the production cost effectively.
【學(xué)位授予單位】:西安理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TG659
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