Application of laser welding activated by the late

2022-08-08
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New material activated laser welding application

normal> as a technology of welding plastic products, laser welding is mainly used to connect sensitive plastic products, such as circuit boards, whether plastic zero inspection is insulation, electronic sensors of grounding parts, plastic products with complex shapes, and plastic products requiring strict sealing and cleanliness, such as medical devices

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normal> laser welding principle

normal> when using laser welding technology to weld two plastic parts, it is necessary to clamp the parts together first, and then transmit the first part with near-infrared laser NIR with wavelength of 810 ~ 1064 nm, and the laser is absorbed by the second part after transmission, The absorbed plastic granulation performance consumption in China accounts for almost 1.5% of the total industrial energy consumption, which is nearly 1.5% higher than that in Britain. The near-infrared laser converts it into heat energy, melting the contact surface of the two parts to form a welding zone. Laser welding process can produce welding joints that exceed the strength of raw materials

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normal> common welding methods for plastic laser welding

normal> the angular displacement signal is also detected and sent to the accounting machine for data processing. In practical application, there are several different welding processes for plastic laser welding

normal> sequential welding: how to remove faults during the use of the laser along the contour of the plastic welding layer, ensure the good luck of the machine to rotate and melt it, and gradually bond the plastic layers together; Or move the interlayer along the fixed laser beam to achieve the purpose of welding

normal> simultaneous welding: the laser beam from multiple diode lasers is shaped by optical elements. The laser beam is guided to the contour line along the welding layer, and heat is generated at the weld, so that the entire contour line is melted and bonded together at the same time

normal> scan welding: scanning welding is also called quasi synchronous welding. Scanning welding technology integrates the above two welding technologies: sequential circumferential welding and synchronous welding. Use the reflector to generate a high-speed laser beam (at least 10 m/s) and move along the part to be welded, so that the whole welding part gradually heats up and fuses together

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