What kinds of CNC machine tools are there? What are the famous CNC machine tools in China?

The well-known CNC machine tools in China are: Shenyang University Machine Tool, Dalian Machine Tool, Hanchuan Machine Tool, Qiyi, Qiyi, Jinan Machine Tool and Guilin Machine Tool.

CNC machine tools are classified as follows:

Classified application

Classification by process use

CNC machine tools for metal cutting include CNC lathes, CNC drilling machines, CNC milling machines, CNC grinders, CNC boring machines and machining centers. They are suitable for machining single parts, small batches and multi-variety parts, with good dimensional consistency, high productivity and automation, and high equipment flexibility.

Metal forming CNC machine tool; This kind of machine tools include CNC bending machine, CNC combined punch, CNC pipe bender, CNC rotary indenter, etc.

CNC special machining machine tools; This kind of machine tools include CNC wire cutting machine tools, CNC EDM machine tools, CNC flame cutting machine tools, CNC laser cutting machine tools, special combination machine tools and so on.

Other types of numerical control equipment; Non-processing equipment adopts numerical control technology, such as automatic assembly machine, multi-coordinate measuring machine, automatic plotter, industrial robot and so on.

Folding is classified by motion mode.

● Point control

The characteristic of point-controlled CNC machine tool is that the moving parts of the machine tool can only move from one position to another accurately, and no machining process is carried out during the movement and positioning. Such as CNC drilling machine, CNC coordinate boring machine, CNC welding machine, CNC pipe bender, etc.

● Linear control

The characteristic of point-to-point linear control is that the moving parts of the machine tool not only need to be accurately moved and positioned from one coordinate position to another coordinate position, but also can realize linear feed movement parallel to the coordinate axis or control two coordinate axes to realize diagonal feed movement.

● Contour control

The characteristic of contour control CNC machine tool is that the moving parts of the machine tool can realize simultaneous linkage control of two coordinate axes. It requires not only to control the coordinate position of the starting point and the ending point of the moving parts of the machine tool, but also to control the speed and displacement of each point in the whole machining process, that is, to control the motion trajectory and machine the parts into straight lines, curves on the plane or curved surfaces in space.

Classification by control mode

● Open loop control

That is, the control mode without position feedback device.

● Semi-closed loop control

Refers to the open-loop control servo motor shaft is equipped with an angular displacement detection device, which indirectly detects the displacement of the moving parts by detecting the rotation angle of the servo motor and feeds it back to the comparator of the numerical control device, compares it with the input command, and controls the moving parts with the difference.

● Closed loop control

It is a direct linear or rotational detection device at the corresponding position of the final moving part of the machine tool, which feeds back the directly measured displacement or angular displacement value to the comparator of the numerical control device and compares it with the input command displacement, and controls the moving part with the difference value to make the moving part move strictly according to the actual displacement.

Performance classification of CNC machine tools

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 wire numerical control system: soft wire numerical control system;