The operation and monitoring of the CNC machine tool are all completed in this CNC unit, which is the brain of the CNC machine tool. Compared with ordinary machine tools, CNC machine tools have the following characteristics:
1. It has strong adaptability to processing objects, adapts to the characteristics of single-piece production of products such as molds, and provides suitable processing methods for mold manufacturing;
2. High processing precision and stable processing quality;
3. Multi-coordinate linkage can be carried out, and parts with complex shapes can be processed;
4. When machining parts change, generally only need to change the numerical control program, which can save production preparation time;
5. The machine tool itself has high precision and high rigidity, can choose a favorable processing amount, and has high productivity (generally 3 to 5 times that of ordinary machine tools);
6. The machine tool has a high degree of automation, which can reduce labor intensity;
7. Conducive to the modernization of production management. CNC machine tools use digital information and standard codes to process and transmit information, and computer control methods are used to lay the foundation for the integration of computer-aided design, manufacturing and management;
8. Higher requirements for the quality of operators and higher technical requirements for maintenance personnel;
9. High reliability.
Compared with traditional machine tools, CNC machine tools have the following characteristics.
1. Highly flexible
Machining parts on a CNC machine tool mainly depends on the processing program. It is different from ordinary machine tools. There is no need to manufacture, replace many molds and fixtures, and do not need to re-adjust the machine frequently. Therefore, the CNC machine tool is suitable for the occasions where the processed parts are frequently replaced, that is, it is suitable for the production of single-piece, small-batch products and the development of new products, thereby shortening the production preparation cycle and saving a lot of process equipment costs.
2. High processing accuracy
The machining accuracy of CNC machine tools can generally reach 0.05-0.1MM. CNC machine tools are controlled in the form of digital signals. Each time the CNC device outputs a pulse signal, the moving parts of the machine tool move a pulse equivalent (usually 0.001MM), and the machine tool advances The average error of the backlash of the transmission chain and the screw pitch can be compensated by the numerical control device. Therefore, the positioning accuracy of the numerical control machine tool is relatively high.
3. The processing quality is stable and reliable
To process the same batch of parts, on the same machine tool, under the same processing conditions, using the same tool and processing procedure, the cutting path of the tool is exactly the same, the parts have good consistency, and the quality is stable.
4. High productivity
The CNC machine tool can effectively reduce the processing time and auxiliary time of the parts. The range of the spindle sound speed and feed rate of the CNC machine tool is large, which allows the machine tool to perform powerful cutting with a large amount of cutting. CNC machine tools are entering the era of high-speed machining. The rapid movement and positioning of moving parts of CNC machine tools and high-speed cutting have greatly improved productivity. In addition, it can be used in conjunction with the tool magazine of the machining center to realize the continuous processing of multiple procedures on one machine tool, reducing the turnaround time of semi-finished products and improving productivity.
5. Improve working conditions
After the CNC machine tool is adjusted before processing, enter the program and start it, and the machine tool can automatically and continuously perform processing until the end of the processing. What the operator has to do is program input, editing, parts loading and unloading, tool preparation, processing state observation, and parts inspection. The labor intensity is greatly reduced, and the labor of machine tool operators tends to be intellectual work. In addition, machine tools are generally combined, which is both clean and safe.
6. Utilize production management modernization
The processing of CNC machine tools can accurately estimate the processing time in advance, standardize and modernize the tools and fixtures used, and it is easy to realize the standardization of processing information. It has been organically combined with computer-aided design and manufacturing (CAD/CAM). It is the foundation of modern integrated manufacturing technology
