High-power semiconductor laser constant-temperature welding device

Abstract

The invention relates to a high-power semiconductor laser constant-temperature welding device which comprises a laser power supply, a programmable logic controller, a laser module, an optical fiber, a laser focus head, an infrared high-temperature detector, a charge coupling apparatus, a display and a bottom plate. The welding device is characterized in that the programmable logic controller is connected with the laser power supply, the high-temperature detector and a touch screen respectively; the optical fiber is connected with the laser module and the laser focus head; the charge coupling apparatus is connected with the display; a part of apparatus are fixed on the bottom plate; and the high-temperature detector, the charge coupling apparatus and the laser focus head are assembled. The device has the advantages of compact structure, accurate temperature, convenient installation, good control performance, easy industrial batch production and the like, and can be widely applied to the fields of laser material processing, laser printed circuit board welding and the like.

Description

technical field [0001] The invention relates to a constant temperature control device, in particular to a high-power semiconductor laser constant temperature welding device, which belongs to the field of laser material processing technology applied to welding technology. Background technique [0002] Laser welding is one of the important aspects of the application of laser material processing technology. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is heat conduction, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse and other parameters to melt the workpiece and form a specific molten pool. Due to its unique advantages, it has been successfully applied in the precision welding of micro and small parts. Laser application to workpiece weldi...

AI Technical Summary

Problems solved by technology

[0004] The above method has a single structure and simple open-loop control, but the temperature of the solder joint cannot be actually controlled during actual welding, and it is prone to poor welding and solder joint burnout.

Moreover, the adjustment of laser power, pulse waveform, and pulse width all depend on operator experience and experiments, which makes parameter adjustment complex and inefficient

Images