What Are High-Edged Processing Technologies of CNC?

CNC technology is a process in which a computer program is used to control a machine, and the mechanical parts are processed according to a program programmed by a staff member.

 

The application of numerical control technology not only brought revolutionary changes to the traditional manufacturing industry, but also made the manufacturing industry a symbol of industrialization. With the continuous development of numerical control technology and the expansion of application fields, he played an important role in the development of some important industries of the national economy and the people's livelihood. An increasingly important role, because the digitization of the equipment required in these industries is a major trend in modern development. From the trend of the development of CNC technology and its equipment in the world, its main research hotspots are as follows:

Efficiency and quality are the mainstays of advanced manufacturing technology. High-speed, high-precision processing technology can greatly improve the production efficiency of products, improve the quality and grade of products, shorten the production cycle of products, and improve the market competitiveness of products. To this end, the Japan Advanced Technology Research Association listed it as one of the five modern manufacturing technologies, and the International Society of Production Engineering identified it as one of the core research directions of the 21st century.

 

In the car industry, the production cycle of an automobile with an annual output of 300,000 vehicles is 40 seconds per vehicle, and multi-variety processing is one of the key issues that must be solved for car equipment. In the aerospace and aerospace industries, the parts processed are mostly thin-walled and thin-ribbed, and the rigidity is very poor.

 

These ribs and walls can only be machined with high cutting speeds and low cutting forces. Large-scale aluminum alloy billet "hollowing" method is used to manufacture large parts such as wings and fuselage to replace multiple parts. It is assembled by numerous rivets, screws and other joints to improve the strength, rigidity and reliability of the components. These all require high speed, high precision and high flexibility for processing equipment. From the situation of EMO2001 exhibition, the basic speed of high-speed machining center can reach 80m/min or even higher, and the idle speed can reach about 100m/min. Many automobile factories in the world, including Shanghai General Motors Co., Ltd. of our country, have replaced parts of machine tools with parts of high-speed machining centers.

 

The CINCINNATI Hyper Mach machine has a feed rate of up to 60m/min, a fast speed of 100m/min, an acceleration of 2g and a spindle speed of 60,000r/min. It takes only 30 minutes to process a thin-walled aircraft part, and the same part takes 3 hours to process in a general high-speed milling machine and 8 hours in a conventional milling machine. The spindle speed and acceleration of the twin-spindle lathes of Germany DMG are 12*1000r/mm and 1g respectively. In terms of machining accuracy, the machining accuracy of general-grade CNC machine tools has been increased from 10μm to 5μm, and precision machining centers have been improved from 3 to 5μm to 1 to 1.5μm, and ultra-precision machining accuracy has begun to enter the nanometer class. In terms of reliability, the MTBF value of foreign numerical control devices has reached more than 6 000h, and the MTBF value of the servo system has reached more than 30,000h, showing very high reliability. In order to achieve high-speed, high-precision machining, the functional components such as electric spindles and linear motors have been rapidly developed, and the application fields have been further expanded.