CNC machining, CNC machining refers to the processing with CNC machining tools. So what is the composition and characteristics of machine tools for processing?
CNC index controlled machine tool is programmed by NC machining language, usually G code. NC machining G code language tells CNC machine tool which Cartesian position coordinates, and controls the tool feed speed and spindle speed, as well as tool converter, coolant and other functions. Compared with manual machining, CNC machining has great advantages, such as the parts produced by CNC machining are very accurate and repeatable; CNC machining can produce parts with complex shapes that cannot be completed by manual processing. CNC machining technology has been widely promoted, most of the machining workshops have the ability of NC machining. The most common NC machining methods in typical machining workshops are CNC milling, CNC lathe and CNC EDM wire cutting (WEDM). The tool for NC milling is called CNC milling machine or CNC machining center. CNC turning lathe is called CNC lathe center. NC machining G code can be manually programmed, but usually the machining workshop uses CAM software to automatically read CAD file and generate G code program to control NC machine tool.
All kinds of machine tools are usually composed of the following basic parts: supporting parts, which are used to install and support other parts and workpieces to bear their weight and cutting force, such as bed and column; speed changing mechanism, which is used to change the speed of main motion; feed mechanism, which is used to change feed rate; headstock for installing machine tool spindle; tool holder, tool magazine; control and control system; lubrication system; cooling System. The accessory devices of machine tool include loading and unloading device, manipulator, industrial robot and other machine tool accessories, as well as chuck, suction cup spring chuck, vise, rotary table and dividing head and other machine tool accessories.
CNC machine tools have the following characteristics:
1、 High machining precision and stable machining quality;
2、 The complex shape of the parts can be processed by linkage;
3、 When the machining parts are changed, only the NC program needs to be changed, which can save the production preparation time;
4、 The machine tool itself has high precision and rigidity. It can choose favorable processing amount and high productivity (generally 3 ~ 5 times of ordinary machine tool);
5、 High degree of automation of machine tools can reduce labor intensity;
6、 Mass production, product quality is easy to control;
7、 The requirements for the quality of operators are low, and the technical requirements for maintenance personnel are high.
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