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

On-line detection method and system for resistance spot welding spatter based on intrinsic process signal

A process signal and resistance spot welding technology, applied in resistance welding equipment, welding equipment, welding power supply, etc., can solve the problems affecting the surface quality and positioning accuracy of the car body, affecting the mechanical properties of spot welding joints, and unable to detect on-line in real time, etc., to achieve The effects of fast calculation speed, good linear correlation, and improved detection efficiency

Active Publication Date: 2021-06-15
SHANGHAI JIAO TONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Splash affects the surface quality and positioning accuracy of the car body, and even affects the mechanical properties of spot welding joints
The existing technology uses manual stripping to measure the quality difference before and after the splash to obtain the quality of the splashed metal, but this method has a large workload, low measurement accuracy and cannot be detected online in real time

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
  • On-line detection method and system for resistance spot welding spatter based on intrinsic process signal
  • On-line detection method and system for resistance spot welding spatter based on intrinsic process signal
  • On-line detection method and system for resistance spot welding spatter based on intrinsic process signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, this embodiment relates to an on-line detection method for resistance spot welding spatter based on intrinsic process signals, which obtains the shape feature quantity of the electrode cap 1 by measuring, then performs welding and collects welding current and intrinsic process signals, and establishes the energization The relationship diagram of the intrinsic process signal changing with time in the welding stage, the relationship diagram is combined with the spatter criterion to judge the number of spatters, the characteristic quantity of each spatter is extracted and combined to obtain the cumulative characteristic quantity of the intrinsic process signal in the spattering process, through this The volume of the splashed metal is calculated by accumulating the characteristic quantity and the shape characteristic quantity of the electrode cap 1, and then the predicted value of the quantity of the splashed metal is obtained.

[0028] Such as ...

Embodiment 2

[0047] Such as figure 2 As shown in b, compared with the embodiment 1, the electrode cap 1 of the present embodiment is an arc-surface cone-top electrode, and the dynamic electrode pressure signal is preferably used as the intrinsic process signal, and the intrinsic process signal sensor 6 of the upper electrode is a load cell. The lower electrode intrinsic process signal sensor 7 is a surface strain sensor, the current sensor 5 is a Hall current sensor 5, and the calculation and analysis module 10 is a monitor.

[0048] Such as Figure 8 As shown, in this embodiment, the threshold A is set to 30N, and the start time and end time of splashing are judged according to the intersection of the dynamic electrode pressure differential signal and the threshold horizontal line, and the number of splashes is determined as one, and the splashing is marked as F 1 , the obtained cumulative feature quantity calculates the volume of spattered metal in the welding process Among them: K ...

Embodiment 3

[0051] Such as figure 2 As shown in c, compared with Example 1, the electrode cap 1 of this embodiment is a spherical electrode, and the bottom diameter D of the electrode cap 1 needs to be measured, and the expression for the volume of the splashed metal is: Among them: K 3 is the correction factor chosen according to the different intrinsic process signals.

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

An on-line detection method for resistance spot welding spatter based on intrinsic process signals. During the welding process, the intrinsic process signals and current signals output by the sensors installed at the two electrode caps are collected in real time and the relationship diagrams over time are established. According to Judgment of spatter by the relationship diagram, get the number of splashes, single feature quantity and combine them to get the cumulative feature quantity in the splashing process; calculate the volume of the splashed metal according to the cumulative feature quantity and the shape feature quantity of the electrode cap, and then get the predicted value of the amount of spattered metal ; According to the intrinsic process signal of resistance spot welding, the present invention performs online prediction of spattered metal amount, realizes online quantitative evaluation of spot welding spatter degree, overcomes the shortcomings of traditional technology relying on manual detection, and significantly improves detection efficiency and accuracy; at the same time, the present invention The invention takes into account the influence of different electrode cap shapes, and has strong applicability. There is a good linear correlation between the predicted value and the measured value of the amount of splashed metal, and the detection accuracy is high; It has low requirements on the hardware system and is suitable for various resistance spot welding application scenarios.

Description

technical field [0001] The invention relates to a technology in the field of welding, in particular to an on-line detection method and system for resistance spot welding spatter based on intrinsic process signals. Background technique [0002] The resistance spot welding process has completed more than 90% of the welding work of the all-steel body. Splash affects the surface quality and positioning accuracy of the car body, and even affects the mechanical properties of spot welded joints. The existing technology uses manual stripping to measure the quality difference before and after the splash to obtain the quality of the splashed metal, but this method has a large workload, low measurement accuracy and cannot be detected online in real time. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes an on-line detection method and system for resistance spot welding spatter based on intrinsic process sig...

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): B23K11/25B23K11/11
CPCB23K11/25B23K11/11G01N33/207B23K11/115B23K11/253B23K11/257B23K31/125
Inventor 夏裕俊沈衍李永兵雷海洋
Owner SHANGHAI JIAO TONG 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