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Short-wavelength efficient stable high-reflectivity metal laser welding system

A laser welding, short-wavelength technology, used in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problem of low laser welding efficiency, and achieve the effect of improving equipment use efficiency, welding speed, and improving welding efficiency

Pending Publication Date: 2018-05-01
CHANGZHOU INNO MACHINING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to overcome the defects of low efficiency of laser welding of high reflective metals in the infrared band (such as 1064nm and 10.6 μm) in the prior art, and provide a high-reflective metal laser welding system with short wavelength, high efficiency and stability

Method used

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  • Short-wavelength efficient stable high-reflectivity metal laser welding system
  • Short-wavelength efficient stable high-reflectivity metal laser welding system
  • Short-wavelength efficient stable high-reflectivity metal laser welding system

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] The structure diagram of the laser welding system of the present invention is as follows figure 1 As shown, a laser welding system for highly reflective metals is provided with a laser 1, a polygonal mirror 2, and several component optical paths in sequence; the split optical path includes an optical attenuation device, a laser transmission mirror group 7, a beam shaping mirror group 8, and a laser focusing lens. Group 9 also includes a laser collector 5, and the light attenuation device includes a half-wave plate 4 and a polarization beam splitter cube 6 arranged in sequence, and the polygon mirror 2 is rotated by a high-speed motor 3; the laser light emitted by the laser 1 shines on the rotating polygon mirror 2 The scanning laser beam is formed on the upper part, and the scanning laser beam can enter the optical path of several components, and finally realize the welding of the first weldment 10 and the second weldment 11.

[0037]In this embodiment, a 40W laser 1 is...

Embodiment 2

[0043] This embodiment is basically the same as Embodiment 1, except that when the laser wavelength is 400nm, the process parameters when welding the laser are: the pulse width range is 10ms, the pulse repetition frequency is 10Hz, and the final diameter of each component optical path is 120 μm The focused spot of light can finally realize the welding of weldment 1 and weldment 2.

Embodiment 3

[0045] This embodiment is basically the same as Embodiment 1, the difference is that: when the laser wavelength is 100nm, the laser 1, the polygon mirror 2 and some component optical paths are placed in an inert gas (such as Ar gas), and the process parameters when welding the laser are : The pulse width range is 30ns, the pulse repetition frequency is 200kHz, and the focused spot with a diameter of 100μm is obtained, and finally the welding of the first weldment and the second weldment is realized.

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Abstract

The invention belongs to a laser welding system, and particularly relates to a short-wavelength efficient stable high-reflectivity metal laser welding system. The short-wavelength efficient stable high-reflectivity metal laser welding system is sequentially provided with a laser device, a polygon prism, a light attenuation device, a laser transmission mirror assembly, a light beam shaping mirror assembly and a laser focusing lens assembly. A laser collector is further included; the light attenuation device comprises 1/2 wave plate and polarization beam splitting cube, the polygon prism rotatesthrough a high-speed motor, and laser sent out by the laser device irradiates the polygon prism to form a scanning laser beam. Compared with an existing laser welding device (an infrared wave band ismainly used, and green light is used little), on one hand, when the system is within the short wavelength range (100 nm to 400 nm), the laser absorbing rate is high, the laser energy utilization rateis high, welding efficiency is high, energy consumption is low, on the other hand, the polygon prism is used in combination with light attenuation devices in all component light paths, all componentlight paths can be used for different welding parts for welding, and the equipment use efficiency and the welding quality can be improved.

Description

technical field [0001] The invention belongs to a laser welding system, in particular to a laser welding system with short wavelength, high efficiency and stability, and high reflection metal. Background technique [0002] Laser is another major invention of mankind since the 20th century. It was invented by American scientists C.H.Townes and T.H.Maiman in 1960. Laser is the abbreviation of Stimulated Emission Light Amplification of Radiation. It is an electromagnetic wave, which is generated by artificial amplification. The basic conditions for its generation include pump source laser medium and resonant cavity, etc. Laser has high monochromatic directional coherence and Brightness, laser is a new type of heat source. [0003] Laser welding is one of the important aspects of the application of laser processing technology, and it is the most eye-catching and most promising welding technology in the 21st century. Compared with traditional welding methods, laser welding has m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/21B23K26/067B23K26/082B23K26/064
CPCB23K26/064B23K26/0673B23K26/0821B23K26/21
Inventor 周云申周蕊聂昕
Owner CHANGZHOU INNO MACHINING
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