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Widening device of high-power laser beam and method thereof

A laser beam, high-power technology, applied in the direction of laser welding equipment, optics, optical components, etc., to achieve the effect of overcoming beam broadening width, high processing efficiency, and high laser energy utilization efficiency

Inactive Publication Date: 2011-10-05
YANCHENG HENGWEI AUTOMOTIVE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the laser beam scanning width of this device is limited by its complex optical path design, and the laser beam can only be broadened within a limited range. For example, the current adjustable laser scanning width is only 20-40mm

Method used

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  • Widening device of high-power laser beam and method thereof
  • Widening device of high-power laser beam and method thereof
  • Widening device of high-power laser beam and method thereof

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Experimental program
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Embodiment

[0028] Embodiment: first as figure 1 As shown, the high-power laser beam stretching device provided in this embodiment is mainly composed of a continuous laser 1 , a fan-shaped reflective focusing mirror 2 , a polygonal mirror 3 , a high-speed motor 4 and a refrigeration cycle system 5 . One side of the polygonal mirror 3 is connected with the rotating shaft of the high-speed motor 4, and its speed is controlled by PLC, and the maximum speed can reach 2000 rpm. A cooling channel is opened in the polygon mirror 3 , and the cooling channel is connected with the refrigeration cycle system 5 . The polygonal mirror 3 is placed opposite to the fan-shaped reflective focusing mirror 2, and the reflection point C of the laser beam emitted by the continuous laser 1 on the polygonal mirror 3 is concentric with the rotation center O of the fan-shaped reflective focusing mirror 2.

[0029] The core of the high-power laser beam broadening device described in this embodiment is the fan-shap...

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PUM

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Abstract

The invention discloses a widening device of a high-power laser beam and a method thereof; the device comprises a continuous laser, a sector reflection focusing lens, a polygon prism and a high-speed motor driving the polygon prism to rotate. The polygon prism is placed opposite to the sector reflection focusing lens; laser beams emitted by the continuous laser are homocentric with a turning center O of the sector reflection focusing lens at a reflecting point C of the polygon prism. The method causes the continuous laser beam output by the continuous laser to form continuous scanning beams in the sector region with a certain scanning angle alpha after being reflected by the polygon prism rotating at high speed, wherein the scanning beams form continuous arc scanning focusing light bands on the surface of the processed work piece to carry out laser surface heat treatment to the work piece after being reflected and focused by the sector reflection focusing lens. Compared with the priorart, the device can implement the controlled widening of the high-power laser beam in a width range (20-500mm); and the processing efficiency and the laser energy use ratio are higher.

Description

technical field [0001] The invention relates to the fields of laser processing and optoelectronic applications, in particular to a high-power laser beam broadening device and method. Background technique [0002] Focusing the original high-power laser beam can form a laser focus point with high energy density, and the focus point with high energy density can be applied to the surface of the metal material, and the surface of the metal material can be treated, such as: metal surface welding, heat treatment etc., to form a special surface layer on the metal surface to enhance the wear resistance, corrosion resistance, fatigue resistance, heat resistance and creep resistance of the metal material surface. The advantages of using laser for material surface heat treatment mainly include: fast processing speed, small thermal deformation zone of the processed part, selective local treatment, good processing flexibility, wide application range, and can handle irregular shaped parts ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/09G02B26/10B23K26/06B23K26/064
Inventor 陈培锋杜建伟罗曦孙长东
Owner YANCHENG HENGWEI AUTOMOTIVE NEW MATERIAL TECH CO LTD
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