Non-standard equipment manufacturing process requires a large number of non-standard sheet metal processing, with the continuous progress of China's economy and science and technology, and CNC machine tools have a strong adaptability to the workpiece, high precision machining, high productivity; CNC technology has been widely used in sheet metal machine tools. It solves the problems of high precision, complex shapes, irregularities, and large quantities of parts that exist in sheet metal processing. At the same time, the simple operation of the CNC system greatly reduces the labor of the workers. strength.
The manufacturing process of non-standard equipment requires a large number of non-standard sheet metal parts, the shape of sheet metal parts is not fixed, the traditional processing methods are difficult, and the energy consumption is high. The introduction of numerical control technology has been widely used in sheet metal machine tools. It solves the problems of high precision, complex shapes, and large batches of parts in sheet metal processing. It also has strong adaptability to workpiece modification and high machining accuracy. Improve productivity and other characteristics, and sheet metal processing technology is diversifying.
Currently, sheet metal can be defined as a comprehensive cold-working process for thin metal plates (usually below 6mm), including shear, punch/cut/composite, bending, welding, riveting, splicing, and molding (such as car bodies). Its distinguishing feature is the uniform thickness of the same part. In general, basic equipment includes shears, CNC punch/laser, plasma, water jet cutting machines, flame cutting machines, bending machines, and various auxiliary equipment such as: uncoilers, levelers, and deburring machines. Spot welding machine, bite mouth machine. Sometimes gold plated gold plated, the word comes from the English platemetal, generally some of the metal sheet by hand or die stamping plastic deformation to form the desired shape and size, and can be further welded or a small amount of mechanical processing The formation of more complex parts, such as the chimneys commonly used in homes, tin furnaces, and car shells are all sheet metal parts.
In general, the three most important steps in sheet metal are cutting, punching/cutting, and bending.
Through the use of numerical control equipment in recent years, it can enhance the processing capability on non-standard sheet metal parts. At present, it is like the major CNC water jet cutting machine, CNC shearing machine, CNC bending machine, CNC turret punching machine, spot welding machine. Plasma cutting machines and other equipment can form a complete sheet metal processing line. At present, more shearing and bending CNC systems such as the Dutch DELEM system are used in the country. The application of this control system is relatively mature and stable.
Cutting plate blanking is the first step in the sheet metal processing process. The accuracy of blanking directly affects the processing quality of the subsequent steps. CNC shearing machine is composed of numerical control device, servo system, measuring device and machine tool. The servo system consists of three servo motors and servo drives. There are two servo motors positioned in front of the machine tool. Usually, one main motor operates alone. If the machine tool is used to machine the hypotenuse, the auxiliary motor works. The CNC system gives two different commands to form the hypotenuse. After positioning there is a servo motor. The application of CNC shears makes it possible to dispense with underscores and line-sequencing processes in large batches of repetitive materials and to increase the efficiency of work, and to ensure the size of the blanks and the tolerances of blanking diagonals.
CNC water jet cutting machine to complete the complex shape and the processing of the opening sheet metal parts, machine tool operators to determine the processing program preparation program according to the parts drawing and process requirements. The operator directly writes the program into the program memory through the operation panel of the machine tool; with the increasingly mature microelectronics and computer technology, it promotes the development of CNC technology in China. With the development of CAD/CAM machine technology, the operator can input the graphics into a computer-generated program through computer-related software and copy it into the disk and input the numerical control system through the disk drive. You can also use computer and CNC system serial input method. The application of CNC water jet cutting machine makes the original complicated shape structure processing become simple, the processing of porous parts can be processed once at a time and the cutting precision can reach ±0.1mm.
Bending is a forming process in sheet metal processing. When the material is bent, the outer layer is stretched and the inner layer is compressed. When the tensile stress of the outer layer exceeds the strength limit of the material, cracks and breaks are generated, and the width of the die is properly selected. The parameters such as bending radius, pressure value, pressure holding time and so on are very important; the traditional hydraulic bending machine can only use the manual to estimate various parameters. The CNC bending machine automatically adjusts the web width according to the input parameters, and calculates related parameters such as the required pressure for bending and contact time through the numerical control system. All parameters are displayed on the screen. CNC bending machine consists of numerical control device, servo system, hydraulic device and machine tool. The servo system is composed of a servo motor and servo drive device. After positioning the machine tool, there is a servo motor. Automatic positioning eliminates the process of manual scribing and alignment. The bending angle of the conventional mold is between 78°-180°. It can be adjusted and replaced with a special mold. The minimum bending angle can reach 30°, and the machining accuracy can be guaranteed within ±0.5°. At the same time, the use of new molds has made the processing of complex curved surfaces a reality. For example, some non-standard angle steels, channel steels, C-shaped steels, cable trays, custom power distribution cabinets, etc. can be processed to produce different specifications according to production needs. In addition, CNC bending is more obvious when processing large quantities of parts. It can complete all the bending procedures of a workpiece at one time. After the system setting, it automatically adjusts the positioning. The positioning block can automatically change the part size according to the program, which can greatly reduce the amount of parts moved by The amount of labor produced.
CNC technology has been widely used in sheet metal machine tools. It solves the problems of high precision, complex shapes, and large quantities of parts that exist in sheet metal processing. Their application in production has greatly improved sheet metal processing capabilities and ensured the quality and yield of sheet metal parts. At the same time, the use of CNC machine tools greatly simplifies the production process, reduces the processing time, improves the production efficiency, greatly improves the material utilization rate, reduces the production cost and reduces the labor intensity of workers, and will be the trend of future equipment application development.
