A photography system of the welding process of compound heat sources in the carbon dioxide laser-melting argon-arc welding

Abstract

This invention relates to one carbon diode laser and metallic arc welding compound thermal source cameral system, which comprises semiconductor laser, floodlight tube, 3D optical adjust rack, multiple ultraviolet antireflection film, round bias vibration combination, intervene filter slices, cameral lens, transfer head and cameral machine, wherein, the former three parts form light source structure; later three parts form image forming structure; the cameral and transfer head form cameral structure; the light structure is at one side of cameral subject and the image forming structure and structure are connected through transfer head at other side of the subject.

Description

technical field [0001] The invention relates to a photography system in the field of welding technology, in particular to a photography system for the welding process of a carbon dioxide laser-argon arc welding composite heat source. Background technique [0002] The welding arc phenomenon is characterized by high droplet transfer frequency (generally tens of Hz), the droplet is shrouded in strong arc light, and the droplet transfer speed is fast (up to tens of meters per second). It cannot be observed directly with the naked eye, and high-speed video or photography must be used for observation and research. At present, the high-speed photography system commonly used in welding process research consists of a light source part, a beam expander part, an imaging part and a photography part. The light source part generally adopts a fixed power gas laser, which forms a spot of a certain size after beam expansion. The beam passes through the melting area of ​​the welding wire, is...

AI Technical Summary

Problems solved by technology

However, due to the use of a fixed power He-Ne laser, the high-power carbon dioxide laser-MIG welding composite heat source welding process that requires multiple transformations for laser power parameters and MIG welding specifications is not flexible enough to ensure full Attenuation effect of laser on plasma and arc light when range parameters are changed

The built optical system requires the beam expander, imaging objective lens, pinhole diaphragm, interference filter, and lens to be strictly coaxial, and the optical components are placed relatively far away. It takes a lot of time to install and adjust the focal length, resulting in non-professional difficult to use

In addition, the pinhole diaphragm mainly performs neutral filtering in the optical system, and attenuates the arc light and the laser to the same degree to avoid overexposure, but the adjustment range of the pinhole diaphragm is very small. very inconvenient

Therefore, it cannot be applied to the research of high-power carbon dioxide laser-argon arc welding composite heat source welding process

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