机电专业毕业设计论文.doc

摘 要 工艺过程 加工工序 Abstract The thesis first introduces the CNC trend: the process focused, high speed, high efficiency, high accuracy, multiple functions. From the NC machining process based talk, from the shallower to the deeper analysis of the NC processing technology characteristics and technical requirements. The typical case parts CNC machining process analysis and example analysis. CNC machining technology is the use of CNC machining parts by using various methods and technical means of the sum, applied to the CNC machining process. NC machining process is accompanied by the emergence and development of CNC machine tool and perfected gradually a kind of application technology, it is the large CNC machining practice summary. NC machining process CNC programming is the premise and the basis, not practical, scientific and reasonable machining process, there can be no real practical numerical control processing program. NC programming is the formulation of the NC machining process content program. This paper mainly discusses the typical threaded hole, slot, parts of the processing technology and tool selection and programming, this kind of parts size precision, accuracy and precision of the shape of requirements are very high, and the processing is more complex, need for a variety of processes, for such parts shall give full consideration to the thread processing precision, inner hole machining accuracy, because the inner hole machining is not easy to observe so processing rises have certain difficulty. For graduate students, this design biggest achievement is: using mechanical design, mechanical drawing, machine manufacturing foundation, metal material and heat treatment, tolerance and technology measurement, theoretical mechanics, mechanics of materials, mechanical principle, computer application foundation as well as craft, jig such as basic theory, project technology and production practice knowledge. Master the mechanical design of the general procedure, method,