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Annular laser welding head and annular laser welding method

A laser welding head, laser welding technology, used in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problem of easy cracking in the central part, reduce ablation, improve welding quality, avoid energy density Gaussian distribution Effect

Inactive Publication Date: 2016-06-22
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides an annular laser welding head and an annular laser welding method, the purpose of which is to solve the problem that cracking defects are easily generated in the central part of conventional spot welding of polymer materials, improve the performance of welded joints of polymer materials and metal materials, save energy and reduce energy consumption. row, improve production efficiency

Method used

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  • Annular laser welding head and annular laser welding method

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Embodiment

[0024] In this embodiment, the focal length of the collimating lens is selected as f=60mm, and the distance between the two circular lenses is adjusted to 61.5mm. By adjusting the coaxial performance of the three cones and measuring the energy density distribution of the annular beam with a beam measuring instrument, the obtained OD 2R 1 =55mm, inner diameter 2r 1 =44.2mm, the ring width W=5.4mm, and the larger ring laser beam with uniform energy density distribution. Since the beam passing through the second conical lens is a parallel beam and is vertically irradiated on the focusing mirror, the distance between the second conical lens and the focusing mirror has almost no influence on the focusing characteristics of the beam, keeping the second conical lens The distance between the lens and the focusing lens is 15mm, and a focusing lens with a focal length f=60mm is added under the second conical lens. Gained outer diameter 2R at focus 2 =2.0mm, inner diameter 2r 2 =1.7m...

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Abstract

The invention relates to an annular laser welding head. The annular laser welding head is characterized in that the welding head is sequentially provided with a collimating mirror, a first circular cone lens, a second circular cone lens and a focusing lens from top to bottom; and the first circular cone lens and the second circular cone lens are placed in a manner that vertex angles are opposite, and the degrees of the vertex angles are equal. When the annular laser welding head conducts welding, laser beam energy density Gaussian distribution can be effectively avoided, the defect that high polymer materials and metal materials are prone to occurring defects such as ablation and air holes in centers of welding lines can be reduced, and the welding quality of the high polymer materials is improved.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a special laser welding head and a welding method in the field of polymer materials and metal materials. Background technique [0002] Polymer materials have the advantages of low density, high strength and good corrosion resistance, and are widely used in industry. Plastic products with complex structures cannot be formed by one-time extrusion, and the various parts need to be connected by connecting technology. Compared with traditional joining methods (vibration friction welding and hot plate welding), laser welding has the advantages of fast speed and good surface forming quality, and is favored in high-end manufacturing industries. [0003] The energy density of the beam of the ordinary laser welding head is Gaussian distribution, and the temperature of the heating zone is basically Gaussian distribution, forming a high heating temperature in the middle of the weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/064B23K26/073B23K26/24
CPCB23K26/064B23K26/0648B23K26/0734B23K26/24
Inventor 徐国建田希玉李春光祝影郭云强
Owner SHENYANG POLYTECHNIC UNIV
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