数控专业外文翻译

数控机床的特点

Characteristics of CNC machine tools

CNC machine operation and monitoring of all completed in the numerical control unit, 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, 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, and military industries has been widely used, digital technology both in hardware and software have rapid development.

Classification and application of CNC machine tools

● use classification by technology

Metal cutting type machine tools, including CNC lathes, CNC drilling, CNC milling, CNC grinding machines, CNC boring hair and processing center. These machines are suitable for single pieces, small batch and multiple varieties and parts processing, has good processing size consistency, high productivity and automation, and high equipment flexibility.

CNC machine metal forming type; such machines, including CNC bending machines, CNC combined punch, CNC bending machine, CNC turret press and so on.

CNC machine tools; such machines, including CNC wire (electrode) cutting machine, CNC EDM, CNC flame cutting machines, CNC laser cutting machine, special machine tool and so on.

Other types of numerical control equipment; non-processing equipment using digital technology, such as automatic assembly machine, multi-coordinate measuring machines, automatic drawing machines and industrial robots.

● classified according to movement pattern

Position control; point control of CNC machine tools is characterized by moving parts of the machine can be achieved only from one location to another precise movement and