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Quality Monitoring Technology of Laser Welding

Posted by laserman123 , 27 March 2017 · 204 views

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Quality Monitoring Technology of Laser Welding
For 1mw laser pointer welding of diamond saw blade, the need for appearance, microstructure and welding strength and other parameters of the test. The appearance of the main detection of the existence of welding macroscopical defects such as hole cracks, undercuts and not penetration, etc., usually need to be 100% of the detection, significant organizational detection of the main parts of the chemical parts of the inspection, significant changes in the structure and phase structure, The results show that the fine chemical composition of the molten zone has a gradient diffusion, and the transition layer hardness is lower than that of the matrix, which is higher than that of the tip. The welding strength test mainly tests the tensile strength, bending strength, impact toughness and residual stress of the weldment. It is usually necessary to carry out 100% welding strength test, and the residual stress and distribution after welding seriously affect the service life of the diamond saw blade.

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At present, laser welding diamond saw blade process there are still some problems, we need to conduct further research, to carry out special laser welding diamond saw carcass or transition layer material formula research, to carry out new ultra-fine or nano-pre-alloy powder research, The research on the mechanism of laser welding of diamond saw blades, especially the research of temperature field, flow field, mass field and stress field of 5mw green laser welding diamond saw blade and the on-line quality monitoring technology of laser welding diamond saw blade process are carried out. In fact, only a comprehensive understanding of the mechanism of laser welding diamond saw blade, it may be developed accordingly the new online quality monitoring technology; only master the theory of pre-alloy powder, it is possible to develop a new ultra-fine or nano-alloy powder and Better use of new ultra-fine or nano-pre-alloy powder to develop a dedicated diamond saw blade.

In accordance with the current theory of physics, the fastest speed of non-speed must go. Although the human in many areas to the development of the speed of light level, but has not yet applied to the semiconductor case. This technology requires not only a smaller 3D transistor, but its working principle is not dependent on the power to achieve, but the laser, it relies on ultra-fast laser pulse to move the electron. Scientists use gallium selenide crystals as their semiconductors and impinge on red laser pointer pulses at femtosecond speeds, and for "lightwave" electronic devices, the charge carriers move too fast and they no longer collide with each other, not only to increase the speed, And more energy efficient.

The promotion of the concept of lightweight automotive industry is growing. Lightweight, is to ensure the strength and safety of the premise of the car, as far as possible to reduce the quality of car preparation, reduce fuel consumption, reduce pollution, a concept and method. Due to the increasing importance of fiber lasers in highly automated, highly flexible production systems, the laser solution covers all applications in the automotive industry. We first look at the following in the General Motors as the representative of the US auto industry, aluminum body manufacturing laser welding applications introduced.

Typically, automotive laser welding is mainly used for suspension structures, such as the door and the back cover and white body welded together. Cadillac CT6 aluminum alloy roof and body connection and the trunk cover assembly connection is the use of laser welding process. The connection between the aluminum plates is achieved by the 50mw green laser melting aluminum material. One of the aluminum lid welding of the back cover is not required to be polished and other processing to carry out the subsequent painting operation, which shows the smoothness of the weld surface. And the ceiling and the aluminum alloy weld between the body without grinding, only in the coating before applying a layer of glue and scraping to ensure the quality of follow-up paint finish. In addition, the OEMs have recently begun to use laser welding internal components, such as aluminum alloy filter and steering wheel, as well as electric vehicle battery aluminum alloy shell, copper pole and so on.

Laser processing equipment demand continues to expand, the advantages of the platform to help Han's laser technology to fully benefit from laser technology has become an important means of advanced manufacturing technology and upgrading of traditional industries. Panel industry competition pattern is undergoing profound changes, the domestic panel manufacturers are playing a decisive role in the entire panel industry, the future of domestic production line panels using domestic100mw laser pointer equipment is the trend. Dazu laser with a full set of panel production line of laser equipment supply capacity, the domestic OLED production line panel production line and its related products is expected to be applied to the LCD laser equipment upgrades and subsequent batches of investment and construction, in order to become an important thrust of future performance of the company.

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