Classification and Application of CNC Machine Tools

● Classification by process purpose

Metal cutting type CNC machine tools, including CNC lathes, CNC drilling machines, CNC milling machines, CNC grinding machines, CNC boring machine and machining centers. These machines are suitable for single-piece, small-batch and multi-species and parts processing, with good processing dimensions Consistency, high productivity and automation, and high equipment flexibility.

Metal forming CNC machine tools; such machines include CNC bending machines, CNC combination punch, CNC pipe bending machine, CNC rotary press and so on.

CNC special processing machine tools; such machine tools include CNC wire (electrode) cutting machine tools, CNC EDM machine tools, CNC flame cutting machine, CNC laser cutting machine tools, special combination machine tools.

Other types of CNC equipment; non-processing equipment using CNC technology, such as automatic assembly machines, multi-coordinate measuring machines, automatic plotters and industrial robots.

● Classified by sport

Point control; point control CNC machine tools feature that the machine's moving parts can only achieve accurate movement from one position to another, and do not perform any machining operations during movement and positioning. Such as CNC drilling machine, press coordinate boring machine, CNC welding machine and CNC pipe bending machine.

Straight line control; point position line control is characterized by the machine's moving parts not only to achieve a coordinate position to another position of the precise movement and positioning, but also to achieve parallel to the coordinate axis of the linear feed motion or to control the two axes to achieve oblique Line feed movement.

Contour control; Contour control The feature of CNC machine tools is that the machine's moving parts can realize simultaneous control of two coordinate axes. It not only requires the control of the starting and ending coordinate positions of the moving parts of the machine tool, but also the speed and displacement of each point of the entire machining process, ie, the need to control the trajectory, machining the parts into straight lines, curves, or surfaces in space. .

● Classified by control

Open-loop control; that is, control without a position feedback device.

Semi-closed-loop control; refers to the angular displacement detection device installed on the open-loop control servo motor shaft. It indirectly detects the displacement of the moving part to the comparator of the numerical control device by detecting the rotation angle of the servo motor, and compares the input command with the difference. Values ​​control moving parts.

Closed-loop control; direct linear or rotary type detection device at the corresponding position of the final moving part of the machine tool, and feedback the directly measured displacement or angular displacement value to the comparator of the numerical control device to compare with the input command shift amount, and use the difference. The value controls the moving part so that the moving part moves strictly according to the actual required displacement.

● Press the number to control the machine performance classification

Economical CNC machine tools;

Mid-range CNC machine tools;

High-grade CNC machine tools;

● According to the composition of the numerical control device used

Hard line numerical control system;

Softwire CNC system.