Many people like to compare laser cutting machines and punching machines. First of all, laser cutting and die punching do not belong to the same type of process and equipment, so there are no comparable items in terms of functions, but there is still a certain degree of economic benefit and efficiency in laser cutting and stamping. The comparability. The laser cutting machine mainly completes the plane cutting of the plate (like oxygen cutting, but with minimal deformation, higher precision and smoother cuts, fully automatic work); it cannot simultaneously realize the stamping process. And stamping is mainly to complete the forming process of the workpiece at one time in cooperation with the mold. Compared with the latter, the precision of the workpiece sheet cut by the laser cutting machine is higher. There is no flash or burr, and no mold is required. Various graphics can be cut at will, and the drawing is what you get.
1. Principle of laser cutting machine
The laser cutting machine uses a focused high-power density laser beam to irradiate the workpiece to quickly melt, vaporize, ablate or reach the ignition point of the irradiated material. At the same time, the molten material is blown away by the high-speed airflow coaxial with the beam to realize the workpiece Cut open. Laser cutting is one of the thermal cutting methods.
2. Application of laser cutting machine in factory
Application of laser cutting machine: The laser cutting machine is mainly used to replace punching and blanking dies and trimming punching dies, so as to save 1 punching and blanking die on the mold, and 2 sets of trimming on the drawing die. Punching dies, under special circumstances, such as corner cutting dies and blanking dies, can also be saved. Generally speaking, laser cutting can cut cold-rolled and hot-rolled steel plates with a thickness of 0.1～16.0mm, copper, steel plate, paper, wood, cloth, etc. The general tolerance is within ±0.1mm. The bracing is simple and convenient, quick to replace, low pollution, relatively low production cost, fast programming and correction procedures, easy to change the hole deviation and large hole in the later period, and there is generally no burr in the trimming process. Since the program can be used repeatedly, the laser cutting machine can be changed and continued to run through programming, which is relatively low-demand. The program can be adjusted according to production needs and quality requirements to achieve the operating speed of the laser cutting head
At present, the laser cutting machine of the company’s factory is mainly used in the CNC machining assembly line, mainly for cutting the web and upper and lower wing plates of the beam. The specific steps are: process the drawing to be processed, after programming, open the file with the operating software of the laser cutting machine, set the parameters such as energy and speed according to the processed material, and then run it. The laser cutting machine will automatically cut according to the flight path generated by the software after receiving instructions from the computer. The use of laser cutting, no molds, high dimensional accuracy of the cut parts, fast cutting speed, small deformation, high cut finish, low processing cost, will gradually improve or replace the traditional cutting process used by the company.
3. Comparison of processing technology between laser cutting and traditional stamping
Traditional sheet metal processing: mechanical cutting speed is slow, noise is large, chip volume is large, and efficiency is low, and the use of blanking technology requires a lot of molds. It is generally necessary to equip dozens or even hundreds of molds during the processing of a product. The mold itself needs a certain design and manufacturing cycle, and the product has a certain trial production cycle, and the economic cost and benefit are often very low.
Laser cutting machine cutting: the energy is even into a tiny space, and this high-density energy is used for non-contact, high-speed, high-precision laser cutting. It is the most widely used laser processing technology in industrial production. method. Compared with traditional mechanical cutting, laser cutting has higher cutting accuracy, lower roughness and higher production efficiency. Especially in the field of fine cutting, laser cutting has more advantages than traditional cutting. The use of laser cutting and blanking in sheet metal operations saves a lot of use, reduces production time and product costs, and laser cutting machines have significant cost-effectiveness in various types of small batch production or later mass production.
4. Cost comparison between laser cutting and traditional stamping
At present, China has become the world’s largest automotive consumer market, and China’s automotive industry is facing opportunities and challenges. The models of foreign brands and joint venture brands continue to penetrate into the low-end and middle-end markets, and are constantly compressing the market share and profit margins of independent brands. The survival and development of independent brands are facing great challenges; on the other hand, facing the country’s Supporting the huge domestic consumer market, self-owned brand cars have obtained a golden opportunity for development.
The fierce competition between domestic and international auto companies requires continuous reduction of costs and expansion of profit margins. Cost has become the focus of attention of auto companies. Tooling equipment investment accounts for 70% to 80% of the cost of vehicle development, and mold development accounts for more than 80% of the cost of tooling equipment investment. Therefore, reducing mold investment costs plays a very important role in the development of the automotive industry. It can be seen from the above figure that the one-time investment of the laser cutting machine is relatively large, but the traditional metal stamping method is much higher than the laser cutting machine in terms of labor, floor space and loss. Considering the long-term consideration of multiple varieties and small batches of special vehicles, it is recommended to use The laser cutting machine performs parts processing.