Laser cutting technology is a more advanced manufacturing technology, has been widely used in automobile manufacturing, in the mold development, trial production of new product sample and stamping parts of small batch production has played a very important role, can partly replace production smaller punching blanking, trimming die, can effectively reduce the production cost of car companies and mold development costs.Compared with the production of stamping parts, laser cutting technology is an advanced and cutting-edge cutting technology, which can greatly improve labor productivity. At present, the application trend in automobile enterprises is quite obvious.
Laser cutting technology and equipment
Laser cutting technology is widely used in the processing of metal and non-metal materials, which can greatly reduce the processing time, reduce the processing cost and improve the quality of the workpiece. Pulsed laser is suitable for metallic materials, continuous laser is suitable for non-metallic materials, the latter is an important application field of laser cutting technology.
Laser cutting is to use a focusing mirror to focus the CO2 laser beam on the surface of the material to melt the material, and at the same time to use the compressed gas coaxial with the laser beam to blow away the melted material, and make the laser beam and the material move relative along a certain trajectory, so as to form a certain shape of the slit.Since the 1970s, with the continuous improvement and development of CO2 laser and NUMERICAL control technology, it has become an advanced processing method for industrial plate cutting. In the 50's and 60's as the main method of cutting plate cutting: for the medium thick plate using oxyacetylene flame cutting; Shears are used to cut the sheet, stamping is used for forming complex parts in large quantities, and vibration shear is used for individual parts. In order to improve the cutting quality of flame cutting, oxyethane precision flame cutting and plasma cutting were popularized after 1970s. In order to reduce the manufacturing cycle of large stamping die, numerical control stamping and electric machining technology have been developed.Various cutting blanking methods have their advantages and disadvantages, which are applicable in industrial production to some extent.
Application of laser cutting technology in stamping parts production
Laser cutting machine is mainly used to replace the punching blanking die and trimming punching die, so as to save 1 pair of punching blanking die on the mold, save 2 minor trimming punching die on the drawing die, under special circumstances, such as cutting Angle die and blanking die, can also save down.
Generally speaking, laser cutting can cut cold rolled and hot rolled steel plates with a thickness of 0.1 ~ 16.0mm, and can cut copper, steel plates, paper, wood, cloth, etc., with general tolerance within ±0.1mm. It is simple and convenient to make supports, quick replacement, small pollution, relatively low production cost, fast programming and correction program, hole deviation and big change in the later period are simple, generally there is no burr in the trimming process.
Because the program can be used repeatedly, the laser cutting machine can be programmed to change parts and continue to run, the relative requirements are not high. According to the production needs and quality requirements, the program can be adjusted to achieve the running speed of laser cutting head.
Cost and disadvantages of laser cutting
The precision of laser cutting machine itself requires high, and the maintenance of equipment requires high. In particular, cutting head lens should be maintained frequently, otherwise, it is easy to damage the lens; Regular water changes are required and only distilled water is required; The gas used requires high purity and humidity. In addition, the laser cutting machine on the operator's skill requirements are higher, requires a certain English reading ability, computer operation ability and numerical control operation ability, have a certain stamping basic knowledge; Compared with larger stamping parts, it is required to be supported, made and maintained. The operation process depends on the skill of personnel, otherwise the stamping parts are easy to produce slag, burns and so on.