Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Penetration prediction and control method and system for laser welding of variable-thickness section plate

A laser welding and panel technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as burn-through, lack of fusion, and coarse weld structure, and achieve high precision.

Active Publication Date: 2021-06-11
HUNAN UNIV +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation of this method is that any uncertain disturbance (such as plate thickness deviation, assembly gap change, laser power fluctuation, etc.) Coarse suture tissue, stomata and other defects
Therefore, it is difficult to reliably apply the method of controlling deep penetration of thickened cross-section materials based on manual experience in the mass welding manufacturing process on the production line.

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
  • Penetration prediction and control method and system for laser welding of variable-thickness section plate
  • Penetration prediction and control method and system for laser welding of variable-thickness section plate
  • Penetration prediction and control method and system for laser welding of variable-thickness section plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Here, the variable-thickness cross-section plate steel produced by Baosteel Group Co., Ltd. is taken as the research object to further illustrate the principle of the present invention. The steel type of the specimen is B340LA, and its chemical composition is shown in Table 1. The size of the welded test piece is 240mm×30mm, and the thickness varies from 1.2mm to 2.0mm. Shot blasting is performed on the welding surface before the test. Removing oxides on the surface of the material can also increase the surface roughness, reduce the reflection of the material to the laser, and improve the absorption rate of the material to the laser.

[0055] Table 1 B340LA steel chemical composition (mass fraction, %)

[0056]

[0057] When the laser power is 800w, the 1.2mm thick area is not penetrated; when the laser power is 1700w, the 2mm thick area has collapse defects. Therefore, welding is carried out with the technological parameters of laser power 800-1700w, welding speed...

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

No PUM Login to View More

Abstract

The invention discloses a method for predicting and controlling penetration depth of laser welding of thickened cross-section plates. Laser power parameters and weld cross-section information in the process of penetration to over-penetration; 2) With the help of regression analysis method, the regression model of laser welding penetration of variable-thickness cross-section plate is constructed. According to the error characteristics, the accuracy of the model is judged, and the best model is selected; 3), according to the variation law of the thickness of the thickened section plate that needs to be laser welded, the optimal processing parameters are calculated through the regression model. The invention can predict and control the shape information of the laser welding seam section of the thickened section plate.

Description

technical field [0001] The invention relates to a penetration prediction and control method for laser welding of thickened cross-section plates, in particular to a method and system for predicting and controlling the cross-sectional shape information of laser welded seam of thickened cross-section plates. Background technique [0002] The automobile industry is a national pillar industry, and energy conservation and emission reduction have become a revolutionary topic for the low-carbon development of the automobile industry. The use of thickened cross-section plates can effectively reduce the weight of automobiles on the basis of ensuring the strength of automobile parts. However, in the application process, it was found that the connection of materials with thickened cross-sections has become one of the key problems that need to be solved urgently in the manufacturing process of this type of materials. The total amount of welding heat input is achieved. Laser welding tec...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20B23K26/03
CPCB23K26/03B23K26/21G06F30/20
Inventor 张屹陆润东李福南张哲豪赵鹏辉韦海英
Owner HUNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com