Unlock instant, AI-driven research and patent intelligence for your innovation.

High-quality vacuum laser welding method and system for large-thickness heterogeneous materials

A heterogeneous material, laser welding technology, used in laser welding equipment, welding equipment, welding/welding/cutting objects, etc., can solve the problems of unstable welding, difficult to achieve ideal welding depth, etc., to improve welding efficiency and suppress plasma Body plume and metal splashes, and the effect of suppressing oxidation reactions

Pending Publication Date: 2022-05-13
哈尔滨工大焊接科技有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the unstable welding and difficulty in reaching the ideal welding depth in the field of large-thickness welding in the existing laser welding technology, the present invention provides a high-quality vacuum laser welding method and system for heterogeneous materials with large thickness. The method achieves a greater penetration depth, increases the regularity of the weld seam, improves the stability of the full-scale weld seam, and realizes a breakthrough in the application of laser welding technology to the welding of large-thickness heterogeneous materials.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-quality vacuum laser welding method and system for large-thickness heterogeneous materials
  • High-quality vacuum laser welding method and system for large-thickness heterogeneous materials
  • High-quality vacuum laser welding method and system for large-thickness heterogeneous materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In specific embodiment 1 of the present invention, the thickness of heterogeneous material is given as carbon steel 20mm, stainless steel 60mm, requires welding depth more than 10mm, welding method is as follows:

[0053] S1: Pre-welding treatment of heterogeneous materials: Laser cleaning the surface of the base plate (carbon steel) 1 and cladding steel plate (stainless steel) 2 to be welded to remove surface oil, oxide layer and rust stains;

[0054] S2: Dynamic adjustment of the clamping and welding mechanism: place the heterogeneous material on the operating platform 4 in the vacuum chamber 3 and clamp and fix it, adjust the size and shape of the laser output spot, align the spot with the starting point of the weld 6, and pass the operation The setting of the traveling mechanism connected to the platform 4 realizes the relative movement of the spot and the fixed track of the composite plate, and ensures that the track of the spot covers the entire weld 6 area;

[00...

Embodiment 2

[0059] In specific embodiment 2 of the present invention, the thickness of heterogeneous material is given as carbon steel 60mm, stainless steel 160mm, requires welding depth 50mm, welding method is as follows:

[0060]S1: Pre-welding treatment of heterogeneous materials: Laser cleaning the surface of the base plate (carbon steel) 1 and cladding steel plate (stainless steel) 2 to be welded to remove surface oil, oxide layer and rust stains;

[0061] S2: Dynamic adjustment of the clamping and welding mechanism: place the heterogeneous material on the operating platform 4 in the vacuum chamber 3 and clamp and fix it, adjust the size and shape of the laser output spot, align the spot with the starting point of the weld 6, and pass the operation The setting of the traveling mechanism connected to the platform 4 realizes the relative movement of the spot and the fixed track of the composite plate, and ensures that the track of the spot covers the entire weld 6 area;

[0062] S3: Hi...

Embodiment 3

[0066] In specific embodiment 3 of the present invention, the thickness of heterogeneous material is given as carbon steel 30mm, stainless steel 100mm, requires welding depth 30mm, welding method is as follows:

[0067] S1: Pre-welding treatment of heterogeneous materials: Laser cleaning the surface of the base plate (carbon steel) 1 and cladding steel plate (stainless steel) 2 to be welded to remove surface oil, oxide layer and rust stains;

[0068] S2: Dynamic adjustment of the clamping and welding mechanism: place the heterogeneous material on the operating platform 4 in the vacuum chamber 3 and clamp and fix it, adjust the size and shape of the laser output spot, align the spot with the starting point of the weld 6, and pass the operation The setting of the traveling mechanism connected to the platform 4 realizes the relative movement of the spot and the fixed track of the composite plate, and ensures that the track of the spot covers the entire weld 6 area;

[0069] S3: H...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Depthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-quality vacuum laser welding method and system for a large-thickness heterogeneous material, and the method comprises the steps: placing a base plate and a cladding plate on an operation platform in a vacuum cabin to form a to-be-welded composite plate, clamping and fixing the to-be-welded composite plate, evacuating air in the vacuum cabin, and inputting inert gas; welding parameters such as the welding speed, the welding power, the defocusing amount, the laser spot shape, the laser welding head swing amplitude and swing frequency are set according to actual needs, a walking mechanism arranged in a vacuum cabin drives an operation platform to enable a welding seam to be covered by the relative movement track of a light spot, the surface of the welding seam is modified through laser remelting in the vacuum environment, the penetration depth is increased, and the welding quality is improved. And after welding is completed, inert gas continues to be input, the pressure intensity is kept unchanged within a period of time, and after air is input, a cabin door is opened to complete welding work. According to the method, the larger penetration depth is achieved under the same laser power condition, one-time forming of the large-penetration-depth weld joint is achieved, and the welding efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the field of welding technology, and more specifically relates to a high-quality vacuum laser welding method and system for heterogeneous materials with large thickness. Background technique [0002] Rolling after welding of large-thickness dissimilar materials is a commonly used manufacturing method for large-thickness composite plates, which are widely used in chemical tankers, pressure vessels, and pipelines. This connection method can make different materials play their respective advantages, but the welding seam of this type of composite plate is generally deep and has a complex structure, so welding is difficult, and its quality and efficiency are difficult to guarantee. Therefore, how to improve the quality and welding efficiency of composite plate welds is a relatively complex system engineering. [0003] Chinese patent CN105127566A discloses a full-penetration welding method for large-thickness carbon steel-stainless ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23K26/21B23K26/60B23K26/70B23K26/12
CPCB23K26/21B23K26/60B23K26/123B23K26/1224B23K26/70B23K2103/166B23K2103/04
Inventor 陈彦宾姜梦陈曦姜楠何崇文李方志
Owner 哈尔滨工大焊接科技有限公司