CNC (Numerical Control Machine) is the abbreviation of Computer Numerical Control (CNC). It is an automatic machine tool equipped with a program control system. The control system can logically process programs having control code or other symbolic instruction specifications and decode them to cause the machine to act and machine parts.
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CNC machining control unit
CNC machining operations and monitoring are all done in this CNC unit, which is the brain of the CNC machine tool.
Compared with ordinary machine tools, CNC machining has the following features:
● High processing precision and stable processing quality;
● Can carry out multi-coordinated linkage and can process parts with complex shapes;
● When processing parts change, generally only need to change the numerical control program, which can save production preparation time;
● The machine itself has high precision and rigidity, can choose favorable processing amount and high productivity (generally 3 to 5 times of ordinary machine tools);
● High degree of automation of machine tools can reduce labor intensity;
● High quality requirements for operators and higher technical requirements for maintenance personnel.
CNC machine tools generally consist of the following components:
● The host, he is the subject of CNC machine tools, including the machine body, column, spindle, feed mechanism and other mechanical components. He is used to complete various
Machining machine parts.
● Numerical control device is the core of CNC machine tools, including hardware (printed circuit boards, CRT monitors, key boxes, tape readers, etc.) and
Corresponding software for inputting digitized part programs, and completing the storage of input information, data conversion, interpolation operations, and realization of various
control function.
● Drive device, which is the drive component of the CNC machine actuator, including spindle drive unit, feed unit, spindle motor and feed power
Machine and so on. He realizes the spindle and feed drive by electric or electrohydraulic servo system under the control of the numerical control device. When several feeds are linked, you can finish
Processing of positioning, straight lines, plane curves and space curves.
● Auxiliary equipment, some necessary supporting parts of the index control machine tool, to ensure the operation of CNC machine tools, such as cooling, chip removal, lubrication,
Lighting, monitoring, etc. It includes hydraulic and pneumatic devices, chip evacuation devices, exchange tables, CNC rotary tables and CNC indexing heads. It also includes tools and
Monitoring and monitoring devices.
● Programming and other ancillary equipment can be used outside the machine for programming, storage and other parts.
Since MIT developed the world's first CNC machine tool in 1952, CNC machine tools have been widely used in the manufacturing industry, especially in the automotive, aerospace, and military industries. CNC machining technology has never been used in hardware. With software, there has been rapid development.
CNC machining center
The CNC machining center is a highly automated multi-function CNC machine with a magazine and automatic tool changer. The workpiece is once on the machining center
After clamping, CNC machining can be performed on more than two surfaces for various processes, and there are many kinds of tool change or tool selection functions, so that the production efficiency is greatly improved.
CNC machining centers are divided into boring and turning operations according to their machining operations. The number of control axes can be divided into three-axis, four-axis, and five-axis CNC machining centers.