Sheet metal working

With the continuous development of science and technology, the application of computer in mechanical aided design, modern CAD/CAM, FMS, CIMS are widely used in numerical control technology. CNC machine tools have experienced five stages of development since they were successfully developed in the United States in 1952. With the increasingly mature microelectronics and computer technology, promote the development of China's numerical control technology, domestic numerical control system has been successfully developed, so that China's numerical control machine tools in quality, performance has been guaranteed. CNC machine tools have been widely used in various fields because of their strong adaptability to workpiece modification, high processing accuracy and improved productivity.

Numerical control technology has been widely used in sheet metal machine tools, which solves the problems of high precision, complex shape and large batch in sheet metal processing. CNC sheet metal machine tools include CNC shearing machine, CNC laser cutting machine, CNC punching machine, CNC bending machine, welding machine, flame cutting machine, etc. Their application in production has greatly improved the processing capacity of sheet metal, ensured the quality and output of sheet metal parts, and greatly reduced the labor intensity of workers.

Sheet metal cutting is a process in the process of sheet metal processing, the accuracy of cutting directly affects the processing quality of the following process, the application of CNC cutting machine to ensure the size of cutting and cutting diagonal work difference. CNC shearing machine is composed of CNC device, servo system, measuring device and machine tool. The servo system is composed of three servo motors and a servo drive device. There are two servo motors in front of the machine tool, usually a main motor works alone, the processing range is 2-500mm, such as the processing of the hypotenuse, the auxiliary motor works, the CNC system gives two different instructions to form the hypotenuse. After positioning there is a servo motor, the main processing of large plate products, processing range of 150 ~ 4000mm. For example, the Shanghai QC12K series CNC shearing machine equipped with the Swiss CYBELEC DNC60 series can store 36 sequences, and the internal storage memory is 100 sequences.

S-stamping is an important link in sheet metal processing, CNC punching machine can replace the processing capacity of the past three punches. Greatly increased productivity. CNC punch is a kind of widely used machine tool, there are two kinds of single punch and turret. This paper takes the CNC1000 model as an example, which is produced in Italy. Machine tools of type C structure, processing scope: 1270×1000mm, the turret has 19 mold stations, divided into the upper and lower parts of the mold punch and die, die external size diameter 25.4mm, 47.62mm, 88.9mm, 125.43mm, 158.4mm, 210.00mm, CNC punching machine generally has X, Y, Z three axes. The X axis is the 0 degree direction of the machine tool, the Y axis is the 90 degree direction of the machine tool, and the Z axis installed on the turret is the device that controls the Angle of the mold.