Characteristics of CNC machine tools
CNC machine operation and monitoring of all completed in the numerical control unit,Cnc machining which is the brains of CNC machine tools. Compared with the general machine tools,
CNC machine tools has the following characteristics:
● high precision, stable processing quality;
● can be multi-axis linkage, can process complex shape parts;
● processing part changes, generally only need to change the NC program, saving the production time to prepare;
● high precision
machine tool itself, rigidity, can choose the amount of benefit processing, production rate (usually as an ordinary machine 3 to 5 times);
● high degree of automation tools, can reduce labor intensity;
● the quality of the operators require a higher tech
nical requirements on higher maintenance staff
CNC machine tools generally consists of the following components:
● host, he is the subject of CNC machine tools, including machine tools, column, spindle, feed mechanism and other mechanical parts. He is used to complete a variety of machining mechanical parts.
● CNC equipment, CNC machine tools is the core, including the hardware (printed circuit boards, CRT monitors,Cnc machining key boxes, paper tape reader, etc.) and the corresponding
software for digital input part program, and complete the input information storage, data transformation, interpolation operations and achieve a variety of control functions.
● drive, he was the implementing agencies CNC drive components, including the spindle
drive unit, feed unit, spindle motor and feed motor. He was under the control of the NC
device electrical or electro-hydraulic servo system to achieve through the spindle and feed drive. When several feed linkage, you can complete the position, line, plane curves and space curves processing.
● assist device, the index control machine tools necessary supporting components to
ensure the operation of CNC machine tools, such as cooling, chip removal, lubrication, lighting, monitoring. It consists of hydraulic and pneumatic devices, chip equipment, pallet, NC rotary table and CNC dividing head, including tools and monitoring detection devices.
● Programming and other ancillary equipment, can be used to machine the part outside the programming and storage.
Since 1952, Massachusetts Institute of Technology developed the world since the first CNC machine tools, CNC machine tools in manufacturing industry, especially in the automotive, aerospace, Cnc machining and military industries has been widely used, digital technology both in hardware and software have rapid development.