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

Resistance spot welding quality evaluation method based on ultrasonic scanning imaging

A technology of resistance spot welding and quality evaluation, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and measuring devices to achieve simple operation, adjustment of imaging resolution, and high imaging efficiency. Effect

Active Publication Date: 2018-08-17
CRRC QINGDAO SIFANG CO LTD
View PDF7 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the huge number of resistance spot welding of stainless steel car bodies, efficient and reliable imaging methods are needed to ensure the detection efficiency, and the existing ultrasonic nondestructive testing methods are not ideal for detecting resistance spot welding defects of stainless steel car bodies

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
  • Resistance spot welding quality evaluation method based on ultrasonic scanning imaging
  • Resistance spot welding quality evaluation method based on ultrasonic scanning imaging
  • Resistance spot welding quality evaluation method based on ultrasonic scanning imaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] Such as figure 1 As shown, the embodiment of the present invention provides a method for evaluating the quality of resistance spot welding based on ultrasonic scanning imaging, which is based on the principle of ultrasonic detection, and performs C-scan imaging according to the ultrasonic signals collected on the planned path of design, and through signal processing Measuring the diameter and indentation depth of the nugget area of ​​resistance spot welding may specifically include the following steps:

[0038] Step 1: Divide resistance spot welding imaging grid;

[0039] The division of the resistance spot welding imaging grid is to pixelate the spot welding imag...

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 relates to the field of resistance spot welding ultrasonic imaging, and discloses a resistance spot welding quality evaluation method based on ultrasonic scanning imaging, and the resistance spot welding quality evaluation method comprises the following steps: dividing resistance spot welding imaging grids; acquiring the position of a grid where a spiral line is located; collecting ultrasonic signals; performing interface wave aligning on the acquired ultrasonic signals; setting multiple gates, and selecting the maximum values of the gates for C-scan imaging; and performing horizontal-section B-scan imaging; if resistance spot welding has defects, determining that the quality of the spot welding is unqualified; if the equivalent diameter of a welding core is not within an acceptable range, determining that the quality of the spot welding is unqualified; if the depth of indentation or the region diameter of the welding core is not within an acceptable range, determining that the quality of the spot welding is unqualified; if the welding core has no defect, the equivalent diameter of the welding core is within the acceptable range, the depth of indentation and the region diameter of the welding core are within the acceptable range, determining that the quality of the spot welding is qualified. The resistance spot welding quality evaluation method has simple operation, large scanning diameter and high efficiency, and obtained results are more realistic.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging of stainless steel car body resistance spot welding, in particular to a method for evaluating the quality of resistance spot welding based on ultrasonic scanning imaging. Background technique [0002] Resistance spot welding occupies a large proportion in the manufacturing process of stainless steel car body, and is one of the key technologies in car body manufacturing. The quality of resistance spot welding directly affects the reliability of welded components and the performance of the entire car body. In the resistance spot welding process, due to the mutual coupling of various uncertain and nonlinear factors such as energy input and distribution, local heat accumulation rate, heat distribution, welding temperature field, etc., different types of defects in resistance spot welding are caused. Defect types of resistance spot welding generally include small nuggets and virtual welds, ...

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): G01N29/06
CPCG01N29/069G01N2291/2672
Inventor 周庆祥李广凯张志毅韩晓辉傅晔徐锋吴坚张泽勇
Owner CRRC QINGDAO SIFANG CO LTD
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