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Thiết Kế CNC và CAD / CAM Xưởng Máy Cơ Khí Công Nghiệp Điện / Điện tử / Công cụ / bảo trì Toán Chất lượng kim loại Sản xuất Control / đáng tin cậy của kỹ thuật hàn Công nghiệp báo chí cung cấp hỗ trợ chuyên ngành và cá nhân trong tất cả các giai đoạn của việc xuất bản cuốn sách viết văn bản, thiết kế, bố trí và tiếp thị. Chúng tôi cung cấp cho tác giả | We must all do our part State Directors District Directors School Administrators and Classroom Teachers to correct a problem long overdue in technical education. Steve Krar CNC Team Leader Precision Machining Technology 6 Preface The term numerical control is a widely accepted and commonly used term in the machine tool industry. Numerical control NC enables an operator to communicate with machine tools through a series of numbers and symbols. NC which quickly became Computer Numerical Control CNC has brought tremendous changes to the metalworking industry. New machine tools in CNC have enabled industry to consistently produce parts to accuracies undreamed of only a few years ago. The same part can be reproduced to the same degree of accuracy any number of times if the CNC program has been properly prepared and the computer properly programmed. The operating commands which control the machine tool are executed automatically with amazing speed accuracy efficiency and repeatability. The ever-increasing use of CNC in industry has created a need for personnel who are knowledgeable about and capable of preparing the programs which guide the machine tools to produce parts to the required shape and accuracy. With this in mind the authors have prepared this textbook to take the mystery out of CNC - to put it into a logical sequence and express it in simple language that everyone can understand. The preparation of a program is explained in a logical step-by-step procedure with practical examples to guide the student. Cartesian Coordinate System Almost everything that can be produced on a conventional machine tool can be produced on a computer numerical control machine tool with its many advantages. The machine tool movements used in producing a product are of two basic types point-to-point straight-line movements and continuous path contouring movements . The Cartesian or rectangular coordinate system was devised by the French mathematician and philosopher Rene Descartes. .
