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Anshan Heli Laser Equipment Co., Ltd.

National Service Hotline : 400-641-6888

Address: No. 368 Qianshan Road, High-tech Zone, Anshan City

Dongguan Heli Laser Equipment Co., Ltd.

Address: No. 48 Wenxiang Road, Xiaoxiang, Wanjiang District, Dongguan City, Guangdong Province

Phone: 0769-88879968


Fax: 0769-21665152

Contact: Mr. Yang

Mobile: 13609678851


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Introduce the characteristics of laser welding and the application and development trend of this technology in the field of new energy vehicle motor manufacturing

Release time: 2015.03.07 News source: Laser cutting machine, laser engraving machine, laser marking machine, laser equipment brand manufacturer-Dongguan Heli Laser Equipment Co., Ltd. Browse times:
Laser cutting machine , laser engraving machine , laser marking machine , laser equipment brand manufacturer-Dongguan Heli Laser Equipment Co., Ltd .: mainly introduces the definition and characteristics of laser welding and the application and development of this technology in the field of new energy automobile motor manufacturing The trend and a simple analysis of the economic and social benefits of this technology in the new energy vehicle motor manufacturing industry.
1 Overview
Laser welding has a wide range of applications in aerospace, automotive industry, electronic packaging, powder metallurgy and biomedicine. As a core component of new energy vehicles, electric motors require high welding strength, small heat-affected zone, high welding precision, and limited welding operation space angle in the manufacturing field of the welding test piece. Compared with traditional welding methods, laser welding has advantages Obviously, the application will become more and more widespread.
2. Features of laser welding
Laser welding is mainly an efficient and precise welding method using a high energy density laser beam as a heat source.
Compared with traditional welding methods, the main advantages of laser welding are: ① The heat input can be minimized, the metallographic range of the heat affected zone is small, and the deformation caused by heat conduction is also the lowest. ② No need to use electrodes, no concerns about electrode contamination or damage. And because it is not a contact welding process, the wear and tear of the machine can be minimized. ③ The laser beam is easy to focus, align and be guided by optical instruments. It can be placed at an appropriate distance from the workpiece, and can be re-guided between the tools or obstacles around the workpiece without any space restrictions. ④ The workpiece can be placed in a closed space (controlled by vacuum or internal gas environment); the laser beam can be focused on a small area, and small and closely spaced components can be welded. A wide range of solderable materials can also be used to join various heterogeneous materials. ⑤ It is easy to perform high-speed welding by automation, and it can also be controlled by digital or computer. When welding thin or thin wire, it is not prone to melting back like arc welding; it is not affected by the magnetic field and can accurately align the weldment. ⑥Can weld two metals with different physical properties (such as different resistance). 真空 No vacuum or X-ray protection is required. ⑧If through-hole welding is used, the bead aspect ratio can reach 12: 1. ⑨ The device can be switched to transfer the laser beam to multiple workstations.
3. Application of laser welding in motor manufacturing of new energy vehicles
(1) Welding motor stator and rotor punching The stator core of the motor is manufactured by riveting, buckle, cementing, welding and other processing processes. Among them, the welded parts are widely used with high quality and low cost. The welding piece is made of silicon steel sheet as the raw material of the stator core, and after shearing, punching and other processing processes, the laminated sheet is fastened and laminated, and several welds are longitudinally welded on the outer wall of the laminated stator at a certain distance to The surface layers of each silicon steel sheet are welded to each other to form a stator as a whole (see Figure 1). During the development of the motor stator welding process, electrode arc welding, CO2 gas shielded welding, argon arc welding, laser welding, etc. have been successively used. From the perspective of welding processability, the latter two welding methods are ideal, while the former two processing methods obviously have the disadvantages of poor forming and large spatter. Motor stator lamination material generally uses cold rolled or hot rolled silicon steel sheet, which has good weldability. For example, laser welding , compared to tungsten arc welding, not only improves productivity, but also improves the health and safety conditions of the production environment. Eliminate the harm to the human body caused by strong arc light and ozone and other bad oxides during argon arc welding. In addition, it can also use a computer to control two or four or single machines to output laser beams, which are distributed around the outer wall of the stator. In this way, the number of welding seams required for the stator can be set once or twice by the welding machine. Can greatly reduce the amount of deformation, and save processing time. The welding of the rotor of the motor rotor is similar to the welding of the stator. The difference is that the rotor welding seam is on the inner wall of the rotor. The laser welding method also has the above advantages!
In order to meet the requirements of welding accuracy and production efficiency in actual industrial production, the laser welding technology will develop in the direction of miniaturization, integration and intelligence of the welding system in the future. In addition, with the development and application of fiber lasers, laser welding will gradually transition to fiber laser welding in the future. Fiber lasers are used instead of YAG lasers to further improve the accuracy of welding. Its energy conversion rate is 40 times that of YAG lasers. At the same time, fiber optic lasers have no removable optics, so the operation and maintenance costs are extremely low, and each laser can save thousands of dollars each year. Maintenance costs in USD.
The emergence of laser welding technology can realize the welding of areas that cannot be applied by traditional welding technology, meeting various welding needs of different materials, metals and non-metals, and because the laser itself has penetrability and refraction, it can be based on the speed of light The running trajectory of itself can achieve arbitrary focus within 360 °, which is undoubtedly unthinkable under the development of traditional welding technology.
With the application of laser welding in the production of motors for new energy vehicles, the performance and life of motors will also be improved, and breakthroughs in motor technology will provide better support for the continuous development of new energy vehicles, and will also bring more More social and economic benefits.
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