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How does a handheld laser welder work?

As a new type of metal welding equipment on the market, the handheld laser welder can realize spot welding, butt welding, stitch welding, sealed welding, etc., with high aspect ratio, small weld width, small heat-affected zone, small deformation, and fast welding speed, The welding seam is smooth and beautiful. It does not need to be processed or simply processed after welding. The welding seam is of high quality, has no porosity, can be accurately controlled, small focus spot, has high positioning accuracy and is easy to realize automation.

 


1. The xenon lamp is driven by the high voltage to emit light. The YGA crystals installed together are illuminated by the laser, resonate through the total reflection and semi-reflection diaphragm, and then input to the optical fiber through the splitter and shutter, and finally focus the laser to a point

 

2. The power density on the focal plane can reach 10 5 -1013 w/cm2. The handheld laser welding machine uses the excellent directivity and high power density of the laser beam to work. Through the optical system

 

3. Concentrate the laser beam in a small area, in a very short time, making the welded part form a highly concentrated local heat source area so that the welded object will melt and form a firm weld spot and weld seam.

 

Laser welding can be realized by a continuous or pulsed laser beam. The principle of laser welding can be divided into heat conduction welding and laser deep penetration welding. The power density is less than 104~105 W/cm2 in heat conduction welding. At this time, the penetration depth is shallow and the welding speed is slow; when the power density is greater than 105~107 W/cm2, the metal surface is recessed into "holes" by heating, forming deep penetration welding. Features of fast welding speed and large aspect ratio.  

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