Measuring method of welding joint shaping organizational characteristics

A technology of welded joints and measurement methods, which is applied in the measurement of welded joints forming structure characteristics and evaluation of welding quality, can solve the problems of inability to accurately identify contour feature points, etc., to eliminate the influence of burrs, reduce excessive distance deviation of edge fluctuations, good effect effect

Inactive Publication Date: 2010-12-01
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, these methods all rely on the curvature of the points to a certain extent. Due to the irregularity of the joint forming contour, these methods cannot accurately identify the contour feature points.

Method used

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  • Measuring method of welding joint shaping organizational characteristics
  • Measuring method of welding joint shaping organizational characteristics
  • Measuring method of welding joint shaping organizational characteristics

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Abstract

The invention discloses a measuring method of welding joint shaping organizational characteristics, comprising the following steps: binary processing the joint outline images; eliminating the transverse and longitudinal burrs on the binary outline images by adopting a depth-first search method; discretizing the binary outline images after elimination of burrs; searching outline segmentation points by adopting a two-point distance deviation method to realize the segmentation of the joint outline; fitting each segment into a quadratic curve respectively; identifying the characteristic point of each quadratic curve; carrying out approximately symmetrical treatment on the quadratic curve for calculating the joint shaping characteristics. The invention accurately analyzes the change regulationof joint outline shapes, improves the measuring accuracy and is beneficial for analyzing the welding quality.

Description

A Measuring Method for Forming Structure Characteristics of Welded Joint technical field The invention relates to the technical field of laser welding, in particular to a method for measuring the structural characteristics of welded joints, which is used for evaluating welding quality. Background technique In the laser welding process, the interaction between the laser and the material, the photoinduced plasma, the behavior of the pinhole and the weld pool determine the quality of the final weld, and it is extremely difficult to gain insight into these phenomena or physical processes, so through the joint Forming to evaluate the quality of welding has become the main means at present. The shape of the welded joint is closely related to the performance of the joint, and is mainly affected by various factors such as materials, heat transfer, and mass transfer during the welding process. The main feature refers to the shape of the cross-section of the weld. At present, the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
Inventor 张朴李旺火刘文中孔力
Owner HUAZHONG UNIV OF SCI & TECH
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