普车知识（General knowledge）.doc

普车知识（General knowledge） Numerical control transformation method and design of general lathe At present, the NC transformation of the machine tool market in our country there is still a lot of room for development, and now Chinas machine tool control rate of less than 3%. Out of the ordinary machining products are of poor quality, less variety, low grade, high cost, long delivery, and lack of competitiveness in the international and domestic market, a direct impact on a companys products, market, benefit, influence the survival and development of enterprises, so it is necessary to improve the rate of CNC machine tools. Taking NC transformation of lathe as an example, this paper introduces the method of NC transformation of machine tools, including the structural modification design, the selection of performance and accuracy, and the determination of the final transformation plan. Key words: numerical control; modification; lathe 0 significance of NC transformation of machine tools 1) save money. Compared with the purchase of new machine tools, the NC transformation of machine tools can save about 60% of the cost, especially large and special equipment. The general large-scale machine tool transformation only needs to spend 1/3 of the new machine tool purchase fee. Even if the structure of the original machine tool is completely reformed, the cost of the new machine tool can only be purchased by 60% and the existing foundation can be utilized. 2) stable and reliable performance. Due to the long time aging of the original parts of the machine tool, almost no stress deformation will occur, which will affect the accuracy. 3) improve production efficiency. After the NC machine is reformed, the automation of the machining can be realized, and the efficiency can be improved by 3 to 5 times compared with the traditional machine tools. For complex parts, the higher the difficulty, the more effective the improvement. Besides, the utility model not only saves the cost, but also