I Beijing Essen Welding Exhibition special bookmark0 fiber laser cutting technology in the rail transit industry Nanjing CSR Puzhen Urban Rail Vehicles Co., Ltd. Quality Management Department Director Cao Zhi laser cutting is the best of all kinds of cutting technology people nowadays Compared with the conventional cutting, the laser cutting has the advantages of small working area, narrow slit, small thermal deformation, high cutting precision, low noise, no pollution and easy automatic cutting. Although the initial investment is large, the processing cost is 50% less than machining, and the laser can cut non-metal. As an advanced manufacturing technology, laser cutting has the advantages of wide application range, flexible process, high processing precision, good quality, clean production process, and easy to realize automation, flexibility, intelligence and improve product quality and labor productivity. Cutting equipment Our company's laser equipment uses G3015F CNC fiber laser cutting and machining center produced by Han's laser. The equipment system is mainly composed of hardware system, software system and laser. Structure, imported gear rack and high-precision linear guide rail, stable transmission, high precision, configuration exchange work table, can make cutting and loading at the same time, greatly improving the production efficiency of the machine tool. The structure is roughed after annealing, and then subjected to vibration aging treatment, which can completely eliminate the stress of welding and processing, has good rigidity and high precision, and can be used for a long time without deformation. Casting, roughing after annealing, and then vibrating and aging, high precision machining, good rigidity, light weight and good dynamic performance. Z, Z and Z axes are all equipped with German Siemens high torque servo motor. High precision, high speed, high torque, large inertia, stable and durable performance, ensuring high speed and acceleration of the whole machine. The special cutting head and the capacitive sensor produced by PRETECITE of Germany have high induction precision, responsiveness and the most stable and reliable performance. The valve precisely controls the air pressure of the cutting aid gas for optimum cutting results. It is much more precise and convenient than a manual pressure regulator. The equipment software system system PA8000 numerical control system, laser cutting machine special numerical control system, integrates many laser cutting control special function modules, powerful, human-machine interface is good, easy to operate. It is the core technology of CNC cutting machine for full-time cutting, high-efficiency cutting and high nesting rate cutting. It is the fundamental guarantee for effectively saving materials and improving cutting efficiency. The fiber laser cutting machine uses the YLS2500 high-power fiber laser from IPGPhotonics, a world-renowned fiber laser manufacturer, as shown. The characteristics of different types of lasers are shown in the attached table. The fiber laser can be coiled due to the optical path, and the optical path occupies less space. In the case of using a single-core junction semiconductor pump laser as the pump source, the pump laser can be dispersedly mounted and has good heat dissipation characteristics. In the case of low installation density, air cooling can be used; in the case of high installation density, different types of laser characteristics compare parameters fiber laser Nd: YAG solid-state laser C2 laser Disc laser electro-optical conversion efficiency 3031015 maximum output power / kW506208BPP (4 /5kW)<2.52568 semiconductor pump life>1000001000NA.10000 floor space (4/5kW)/m2<163>4 maintenance and operation costs/h-1(4/5kW) 235208 maintenance does not need frequent frequent flexible processing Suitable for suitable and unsuitable suitable stability, poor stability, good absorption rate, steel 35351235, absorption rate, aluminum 7727, replacement parts, high-brightness broadband single-core junction semiconductor laser, pumping time of more than 50,000 h. After one of the semiconductors is damaged, the replacement only needs 300~500 USD, because each semiconductor pump source can work continuously with each other for less than 1 000 hours. The supplementary semiconductor Bar strip (array) of the working gas has a maximum 5000h pulse mode or 10000h continuous. mode. The entire pump source needs to be replaced frequently during the use of the laser. Each replacement requires 200,000 to 230,000 US dollars (down to page 38). It is made of hot-worked alloy, aluminum alloy and carbon fiber material. Large cutting can be used for this material. Machine, 400MPa high power high pressure system, five-axis control cutting head for cutting processing. Such components of the skeleton structure not only have high strength requirements, but also need to reduce their own weight and reduce energy consumption under the condition of meeting the strength requirements. The commonly used materials are alloy steel, stainless steel, aluminum alloy, titanium alloy and carbon fiber. . For the wings from the tail of the Boeing 777 and Airbus A380 to the Boeing 7E7 and F117; from the turbine blades of the jet engine to the Apache helicopter, a multi-function waterjet cutter, 400MPa high-power high-voltage system can be used for these structural components. 5-axis cutting head for cutting. Pipes and joint flanges are often made of titanium, aluminum alloy and carbon fiber. For this material, 400MPa medium and small power high pressure system, small and medium-sized cutting machine and universal cutting head can be used for cutting. The parts are mostly made of aluminum alloy and engineering plastic seat brackets. It is made of foam plastic, coated with chemical fiber fabric, leather and artificial leather. It can be cut by robot water knife (six-axis control), 400MPa medium and small power high-pressure system and pure water cutting head. They are all made of glass and laminated glass. It can be cut by small and medium-sized cutting machine, 300~400MPa low-power high-pressure system, general water cutting head or water cutting machining center. Foreign countries have successfully used the abrasive waterjet to drill and cut composite materials without surface peeling, and can be integrated with new or existing robots and gantry, which can be quickly reprogrammed for short-term operation and quickly replaced. Or cancel the machine head, template, guide and manual trimming. This allows cutting composites to be faster, longer tool life, no dust, and cleaner and safer productivity. MW (20140320) (continued from page 33) requires only a small amount of water to meet the heat dissipation requirements. Therefore, the all-fiber laser is smaller and lighter in weight than gas and solid-state laser systems of the same output power. Compared to other lasers, fiber lasers have more accurate beam quality and a small divergence angle. Anti-loose plate cutting case The bogie anti-loose plate is an irregular curve contour structure. The material is 1Cr18Ni9Ti stainless steel plate with a thickness of 8mm and the curvature of the outer contour is variable. The central pin hole size tolerance is required to be 35+S.imm, requiring a smooth transition of the machining area. The laser with a pulse power of 2.4 kW is used, the cutting speed is up to 2.2 m/min, and the focal length of the laser beam is 0.12 to 0.25 mm. It has been verified by practice that the products of fiber laser cutting can fully meet the practical requirements. Other subway based laser cutting parts are shown. IV. Conclusion In summary, the products processed by fiber laser cutting have narrow slits (0.1~0.5mm), small deformation, no burrs, wrinkles, high precision (hole center distance error 0.1~0.4mm, contour size error) 0.1~0.5mm), the surface quality of the incision is good, Ca=12.5~25pm). Because the CNC laser cutting system is convenient for cutting workpieces of different shapes and sizes, it is often preferred over the die cutting and molding process; although the machining speed is slower than the die punching, it has no mold consumption, no need to repair the mold, and saves the mold replacement. Time, which saves processing costs and lowers product costs, is generally more economically economical. Auto Led Interior Lights,Car Interior Light,Lights For Inside Car,Auto Interior Lights CHANGZHOU CLD AUTO ELECTRICAL CO.,LTD , https://www.cld-leds.com