Laser welding machine provided with on-line continuous heat-treatment for welding seam

A laser welding machine and laser welding technology, applied in heat treatment furnaces, heat treatment equipment, other manufacturing equipment/tools, etc., can solve the problems of easy welding stress, hydrogen-induced cracks, high degree of hardening, etc., to reduce the degree of hardening, Effect of reducing welding strain rate and uniform temperature

Inactive Publication Date: 2017-01-25
WUHAN KAIQI SPECIAL WELDING EQUIP
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] 2. Due to the large temperature difference between the welding area before welding and welding, it is easy to produce welding stress. At the same time, due to the high welding strain rate, it is easy to produce welding cracks and the escape of diffusible hydrogen in the weld metal. Hydrogen-induced cracking, and the degree of hardening of the weld and the heat-affected zone is relatively high

Method used

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  • Laser welding machine provided with on-line continuous heat-treatment for welding seam
  • Laser welding machine provided with on-line continuous heat-treatment for welding seam
  • Laser welding machine provided with on-line continuous heat-treatment for welding seam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A laser welding machine with on-line continuous welding seam heat treatment, comprising a welding trolley 1, and a shearing device 2, a laser welding device 3 and a rolling device 4 which are sequentially installed on the welding trolley 1, on the welding trolley 1 Corresponding to the position in front of the laser welding device 3 is provided with a preheating device 5 capable of continuously raising and preheating the welding area online, and the preheating device 5 is arranged between the shearing device 2 and the laser welding device 3, The welding trolley 1 is provided with a heat treatment device 6 that can perform on-line continuous welding seam heat treatment on the welding seam area at a position corresponding to the rear of the laser welding device 3. By preheating the welding area before welding, it can not only reduce the welding stress, but also reduce the welding strain rate, which is beneficial to avoid welding cracks and the escape of diffused hydrogen in...

Embodiment 2

[0040] Embodiment 2 (for high-strength alloy steel and high-phosphorus steel, etc., of course, 400 series stainless steel can also adopt the scheme of this embodiment, but it is easy to produce brittleness):

[0041] A laser welding process with on-line continuous weld heat treatment, including the following steps:

[0042] 1) On-line strip steel is cut and seamed through the cutting device 2 at the cutting station of the welding process;

[0043] 2) After the shearing and splicing is completed, the welding area of ​​the online strip is continuously heated and preheated to 100-200°C through the preheating device 5 at the preheating station of the welding process;

[0044] 3) After warming up and preheating, the online strip is welded by the laser welding device 3 at the welding station of the welding process;

[0045] 4a1) After the welding is completed, the weld area of ​​the on-line strip is normalized once through the primary normalizing mechanism 6a1 at the primary normalizing stati...

Embodiment 3

[0051] Example 3 (specially for 400 series stainless steel):

[0052] A laser welding process with on-line continuous weld heat treatment, including the following steps:

[0053] 1) On-line strip steel is cut and seamed through the cutting device 2 at the cutting station of the welding process;

[0054] 2) After the shearing and splicing is completed, the welding area of ​​the online strip is continuously heated and preheated to 100-200°C through the preheating device 5 at the preheating station of the welding process;

[0055] 3) After warming up and preheating, the online strip is welded by the laser welding device 3 at the welding station of the welding process;

[0056] 4a1) After the welding is completed, the weld area of ​​the on-line strip is normalized once through the primary normalizing mechanism 6a1 at the primary normalizing station of the welding process, and the primary normalizing temperature is 600~ 800°C;

[0057] 4a2) After the primary normalization is completed, the w...

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Abstract

The invention discloses a laser welding machine provided with on-line continuous heat-treatment for welding seam. The laser welding machine comprises a welding trolley, and the welding trolley is provided with a pre-heating device and a heat-treatment device, a shearing device, a laser welding device and a rolling device. The next step of welding process is the brittleness treatment process whose position is provided with a brittleness treatment devise. The brittleness treatment devise comprises an auxiliary engine trolley and a water tank, an annealing mechanism and a circulating water cooler, which are arranged on the auxiliary engine trolley in sequence. A rapid cooling sprayer which is used to cool rapidly the front and back of on-line strip steel welding area, is arranged on each position in the water tank and above the auxiliary engine trolley. The rapid cooling sprayer is communicated with the output port of the circulating water cooler. The water tank is communicated with the input port of the circulating water cooler. The heat-treatment device comprises a normalizing mechanism and a tempering mechanism. The normalizing mechanism is provided between the welding devise and the rolling device, and the tempering mechanism is arranged at the rear of the rolling device. The laser welding machine provided with on-line continuous heat-treatment for welding seam is suitable for welding machines.

Description

Technical field [0001] The invention relates to the field of welding, in particular to a laser welder with on-line continuous weld heat treatment. Background technique [0002] With the rapid development of industries such as automobiles, bridges, construction, home appliances and other industries that have a large demand for steel in China, steel companies are increasingly demanding high-standard and cost-effective steel output and quality. At present, most domestic steel companies are gradually moving towards product transformation and equipment upgrading. Therefore, the welding of special steel is a major problem we are about to face, but ordinary laser welding machines cannot meet the welding requirements of special steel grades, especially 400 series stainless steel, high-strength alloy steel, and high-phosphorus steel. : [0003] 1. Since laser welding is to emit a high-energy density laser beam on the spliced ​​strip steel gap, the workpiece to be welded is instantly heate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04B23P15/00C21D9/50
CPCB23P23/04B23P15/00C21D9/50
Inventor 余磊刘军陈俊夏思明张炼芦洪波邓宗林芦立楷
Owner WUHAN KAIQI SPECIAL WELDING EQUIP
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