Non-standard equipment manufacturing process requires a large number of non-standard sheet metal parts processing, with the continuous progress of China's economy and science and technology, and CNC machine tools have strong adaptability to the workpiece modification, high processing accuracy, high productivity characteristics; Therefore, numerical control technology has been widely used in sheet metal machine tools, which solves the problems of high precision parts, complex shape, irregular, large batch and so on in sheet metal processing, and the simple operation of numerical control system greatly reduces the labor intensity of workers.

Non-standard equipment manufacturing process requires a large number of non-standard sheet metal parts processing, sheet metal parts shape is not fixed, traditional processing methods are difficult, high energy consumption. The introduction of numerical control technology has been widely used in sheet metal machine tools, it solves the problems of high accuracy, complex shape, large batch and other problems in sheet metal processing, and has strong adaptability to the workpiece modification, high processing accuracy, improve productivity and other characteristics, and sheet metal processing technology is developing in the direction of diversification.

At present, sheet metal can be defined as: a comprehensive cold working process for sheet metal (usually less than 6mm), including cutting, punching/cutting/compounding, bending, welding, riveting, splicing, forming (such as car bodies). Its remarkable feature is the same thickness of the same part. Generally speaking, the basic equipment of sheet metal includes shearing machine, CNC punching machine/laser, plasma, water jet cutting machine, flame cutting machine, bending machine, and various auxiliary equipment such as: uncoiling machine, leveling machine, deburring machine, spot welding machine, biting machine, etc. Sheet metal is sometimes also known as metal plate, the word comes from the English platemetal, is generally some metal sheet through manual or mold stamping to produce plastic deformation, form the desired shape and size, and can be further through welding or a small amount of mechanical processing to form more complex parts, such as the chimney, iron furnace commonly used in the family. And the shell of the car is all sheet metal.

Generally, the three most important steps in sheet metal are cutting, punching/cutting, and bending.

Through the use of CNC equipment in recent years, can enhance the processing capacity of non-standard sheet metal parts, such as the main CNC water jet cutting machine, CNC shearing machine, CNC bending machine, CNC turret punch, spot welding machine, plasma cutting machine and other equipment can form a complete set of sheet metal processing production line. At present, the domestic use of more cutting plate, bending CNC system such as the Dutch DELEM system, the control system application is more mature and stable.

Sheet cutting is the first process in sheet metal processing, and the accuracy of cutting directly affects the processing quality of the following process. 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 positioned in front of the machine tool, usually a main motor works separately, such as processing the hypotenuse, the auxiliary motor works, and the CNC system gives two different instructions to form the hypotenuse. There is a servo motor in the rear position. The application of numerical control shearing machine makes the mass of repeated cutting to avoid the scribing, line-matching process, improve labor efficiency, and ensure the size of the cutting and the tolerance of the cutting diagonal.

CNC water jet cutting machine completes the processing of complex shapes and perforated sheet metal parts, and the machine operator determines the processing plan according to the part drawing and process requirements. The operator writes the program directly into the program memory through the operation panel of the machine tool; With the increasing maturity of microelectronics and computer technology, the development of numerical control technology in China has been promoted. With the development of CAD/CAM technology, the operator can input the graphics into the computer through computer-related software to generate the program, copy the disk through the disk drive to enter the numerical control system. Can also use the computer and numerical control system serial input method. The application of CNC water jet cutting machine makes the original complex shape structure processing simple, the processing of porous parts a positioning cutting molding, cutting accuracy up to ±0.1mm.