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

Welded joint metal streamline angle automatic measurement method of high-frequency welded pipe

A technology for welded joints and high-frequency welded pipes, applied in measuring devices, image data processing, instruments, etc., can solve problems such as unclear display of weld metal flow lines, time-consuming and labor-intensive measurement work, etc., to reduce the influence of human factors and achieve accurate The effect of convenient measurement and reduced labor intensity

Inactive Publication Date: 2019-11-29
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are at least the following problems in the prior art: 1) The width of the heat-affected zone (waist drum zone) of the welded joint of the high-frequency welded pipe is usually only 1-3 mm, and the weld metal flow line is not clearly displayed
2) Each sample needs to measure the weld streamline angles in 4 areas. When batch inspection is carried out, the measurement work is time-consuming and laborious

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
  • Welded joint metal streamline angle automatic measurement method of high-frequency welded pipe
  • Welded joint metal streamline angle automatic measurement method of high-frequency welded pipe
  • Welded joint metal streamline angle automatic measurement method of high-frequency welded pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] When applying the present invention to display the macroscopic parameters of the high-frequency welded pipe welded joints with steel grade N80-1 casing, the specific steps are:

[0041] 1) Sample preparation: The cross-sectional sample of the welded joint is prepared into a mirror surface, and the specific steps include grinding and polishing.

[0042] Sample polishing is to use different grades of metallographic water sandpaper to polish the test surface of the sample. After replacing the fine sandpaper, the grinding direction is 90° from the previous grinding direction until the previous grinding marks are worn off. The above process needs to keep a certain flow of water as cooling fluid without interruption. The order of the card numbers of the metallographic water sandpaper used in the grinding process is 240#, 600#, 1000#, 1500#.

[0043] Sample polishing treatment includes rough polishing treatment and fine polishing treatment;

[0044] The rough polishing treat...

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 welded joint metal streamline angle automatic measurement method of a high-frequency welded pipe. The method comprises the following steps: firstly polishing a cross sectionsample of a welded joint into a mirror surface, and then etching, and then collecting a metal streamline organization picture, detecting a target image by adopting Sobel edge and performing segmentation and binarization, and determining all included angles of the streamlines and the horizontal line by traversing pixels of the upper edge by using an array, namely accomplishing the measurement. Themetal streamline display of the welded joint of the high-frequency welded pipe in the collected metal streamline organization picture is extremely clear, and the Sobel edge detection and binarizationimage processing can be performed through a computer, thereby realizing automatic measurement. A tester can accurately and conveniently measure the metal streamline angle of the welded joint of the high-frequency welded pipe, the labor intensity of the tester is lowered, and the influence of the manual factor is reduced.

Description

technical field [0001] The invention belongs to the field of metal material welding, and in particular relates to a method for automatically measuring the metal streamline angle of a welded joint of a high-frequency welded pipe. Background technique [0002] Due to the advantages of high dimensional accuracy, high production efficiency, and low price, High Frequency Welding (High Frequency Welding) steel pipes have been used more and more in the fields of oil and gas exploration and oil and gas gathering and transportation. In industrially developed countries, the proportion of high-frequency welded pipes in pipeline projects with a diameter of less than 610mm has reached about 70%. But in China, the application of high frequency welded pipe is relatively slow. Compared with foreign products, the main deficiency of domestic products is the unsatisfactory welding process quality. When welding high-frequency welded pipes, due to the proximity effect and skin effect, the edge...

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): G01B11/26G01N21/84G06T7/00G06T7/13G06T7/60
CPCG01B11/26G01N21/84G06T7/0004G06T7/60G06T2207/30152G06T7/13
Inventor 仝珂贾君君瞿婷婷张华
Owner BC P INC CHINA NAT PETROLEUM CORP
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