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Laser welder and welding technology with online continuous weld seam heat processing

A laser welding and laser welding machine technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of easy welding stress, hydrogen-induced cracks, and high degree of hardening, so as to reduce the degree of hardening and improve the metal Elongation, temperature uniformity effect

Active Publication Date: 2015-09-09
武汉凯奇冶金焊接设备制造有限责任公司
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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 welder and welding technology with online continuous weld seam heat processing
  • Laser welder and welding technology with online continuous weld seam heat processing
  • Laser welder and welding technology with online continuous weld seam heat processing

Examples

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Comparison scheme
Effect test

Embodiment 1

[0058] A laser welding machine with on-line continuous weld seam heat treatment, including a welding trolley 1, and a shearing device 2, a laser welding device 3 and a rolling device 4 installed on the welding trolley 1 in sequence, and the welding trolley 1 Corresponding to the position in front of the laser welding device 3, there is a preheating device 5 capable of performing online continuous temperature rise and preheating of the welding area, and the preheating device 5 is arranged between the shearing device 2 and the laser welding device 3, The position corresponding to the rear of the laser welding device 3 on the welding trolley 1 is provided with a heat treatment device 6 capable of performing on-line continuous weld seam heat treatment on the weld seam area. Preheating the welding area before welding 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 the ...

Embodiment 2

[0063] 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):

[0064] A laser welding process with on-line continuous weld seam heat treatment, comprising the following steps:

[0065] 1) The on-line strip steel is cut and stitched by the shearing device 2 on the shearing station of the welding process;

[0066] 2) After the shearing and jointing is completed, the welding area of ​​the on-line strip steel is preheated to 100-200° C. through the preheating device 5 on the preheating station of the welding process;

[0067] 3) After heating up and preheating, the online steel strip is welded by the laser welding device 3 on the welding station of the welding process;

[0068] 4a1) After the welding is completed, the weld zone of the online strip steel is carried out on the primary normalizing station of the welding process through th...

Embodiment 3

[0074] Embodiment 3 (specifically for 400 series stainless steel):

[0075] A laser welding process with on-line continuous weld seam heat treatment, comprising the following steps:

[0076] 1) The on-line strip steel is cut and stitched by the shearing device 2 on the shearing station of the welding process;

[0077] 2) After the shearing and jointing is completed, the welding area of ​​the on-line strip steel is preheated to 100-200° C. through the preheating device 5 on the preheating station of the welding process;

[0078] 3) After heating up and preheating, the online steel strip is welded by the laser welding device 3 on the welding station of the welding process;

[0079] 4a1) After the welding is completed, the weld zone of the online strip steel is carried out on the primary normalizing station of the welding process through the primary normalizing mechanism 6a1 for primary normalizing of the online continuous weld seam, and the primary normalizing temperature is 60...

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Abstract

The invention discloses a laser welder with online continuous weld seam heat processing, which comprises a small welding vehicle, a cutting device, a laser welder and a rolling device that are sequentially set on the small welding vehicle, wherein a preheat device is set on a position of the small welding vehicle corresponded with the front of the laser welder; the preheat device is set between the cutting device and the laser welder; a heat processing device is set on a position of the small welding vehicle corresponded with the back of the laser welder; the invention also discloses a laser welding technology with online continuous welding heat processing; the steps comprise that an online strip steel is cut and welded on a cutting station through the cutting device; after being cut and welded, the welding area of the online strip steel is preheated to rise in temperature through the preheat device; after being preheated, the online strip steel is welded on a welding station through the laser welder; after welding is completed, heat processing and rolling are carried out to the weld seam area of the online strip steel on a preheat station and a rolling station respectively through the preheat processing device and the rolling device; and the welding technology is suitable for welders.

Description

technical field [0001] The invention relates to the field of welding, in particular to a laser welding machine with on-line continuous welding seam heat treatment and its welding process. Background technique [0002] With the rapid development of my country's automobile, bridge, construction, home appliance and other industries that have a large demand for steel, steel companies have higher and higher requirements for the output and quality of high-standard and cost-effective steel. At present, most domestic iron and steel enterprises are gradually moving towards product transformation and equipment upgrading. Therefore, the welding of special steel is a major problem that we are about to face, but the use of ordinary laser welding machines and welding processes cannot meet the welding requirements of special material steel, especially 400 series stainless steel, high-strength alloy steel and high phosphorus steel. ,specifically: [0003] 1. Since laser welding is to emit...

Claims

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Application Information

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IPC IPC(8): B23K26/24B23K26/60B23K26/70B23P17/00
CPCB23K26/24B23P17/00
Inventor 余磊刘军陈俊夏思明张炼芦洪波邓宗林芦立楷
Owner 武汉凯奇冶金焊接设备制造有限责任公司
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