Nc machining principles and characteristics

( 1) Nc machining principle when we use the machine parts, usually need to control the action of machine tools, one is the control action sequence, 2 it is to control all the moving parts of machine tool displacement. Using ordinary machine tool, this kind of drive, parking, feeding, reversing, spindle speed and switch cutting fluid is directly controlled by manual operation. Using automatic machine and copying machine tool processing, the operation and movement parameter is through good design CAM, modeling and stop device in the form of analog control, although they can work more complex parts, and has certain flexibility and generality, but the parts machining precision affected by CAM, precision mould making, also for a long time to prepare and process. Using numerical control machine tool parts, just need to parts graphics and process parameters, the processing steps in the form of digital information, such as forming procedure code input to the machine tool control system, and after processing by the command signal to drive servo mechanism, so as to control machine tool parts coordinated action, automatically processing parts. When change the processing object, only need to write the program code, input to the machine tool, can by the nc device instead of the human brain and hands most of the function, control the whole process of processing, create arbitrarily complex parts. The principle of the nc machining - as shown in figure 1 1. ( 2) In general, the characteristics of the nc machining nc machining has the following features: (1) high degree of automation, high production efficiency. (2) strong adaptability of processing object. (3) processing of high precision, stable quality. (4) easy to set up between the computer and communication, easy to realize group control.