Roll processing flaw detecting method

A technology of crack detection and detection method, which is applied in the detection field, can solve problems such as blind spots in the inspection of roll processing quality, small cracks cannot be detected, and the effect is not very good, so as to improve roll processing efficiency, reduce roll consumption, and avoid Effect of low roll life

Inactive Publication Date: 2008-01-30
TIANJIN PIPE GROUP CORP
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of this method is not very good, and small cracks cannot be

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The application process of the roll processing crack detection method of the present invention will be described in conjunction with the embodiments.

[0014] In the process of implementing the roll processing crack detection method of the present invention, the DA-400S type magnetic particle flaw detector of the U.S. PARKER company, the MT-BO type black oil magnetic suspension produced by the Sino-Japanese joint venture Meikoda Flaw Detection Equipment Co., Ltd. The surface is inspected for cracks.

[0015] Roll processing crack detection method of the present invention is realized like this:

[0016] a. Wipe the surface of the processed roll clean with a cloth.

[0017] b. Connect the DA-400S magnetic particle flaw detector to the power supply.

[0018] c. Spray black oil magnetic suspension on the part of the roll surface to be flaw detected.

[0019] d. Hold the magnetic particle flaw detector, turn on the power switch, adjust the contact angle between the two co...

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 provides a crack detection method of roll dressing, the steps of which is that: scrapping the surface of the rolls after processing; connecting magnetic particle detector to the electricity; spraying black oil magnetic suspension on the defectoscopy of the roll surface; opening the switch of the magnetic particle detector and adjusting the angle of the two contact heads and being positioned at the black oil magnetic suspension sprayed. After observation of the roll surface, magnetic powder can be found at the crack if crack exists; then carrying on flaw inspection in a plurality of different places on the roll surface, the process should be continued if crack is observed until no crack is detected. The invention has the beneficial effects that tiny crack on the roll surface is efficiently detected after roll processing by the detection method. Then appropriate procession can be continued which not only cuts down the loss during raising the processing capacity blindly, but also avoiding the short service life of rolls caused by not eliminating the cracks completely.

Description

technical field [0001] The invention relates to a detection technology in the production of steel pipes, in particular to a detection method for cracks in roll processing. Background technique [0002] Cracks will appear on the surface of the rolls used in steel pipe production, and the cracks will be removed by turning. If the cracks cannot be completely removed during processing, the rolls will age prematurely in the next use and affect the quality of the steel pipe. Frequent replacement of rolls also affects the rolling rhythm, and sometimes even causes serious accidents such as roll cracking and stacking of steel. Therefore, it is very important to detect whether there are still cracks on the surface of the roll after processing. [0003] Because the roll will be subjected to a large rolling force during use, sometimes deep and small cracks will be generated, which are not easy to find with the naked eye after the roll is processed. Therefore, a flaw detection develope...

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): G01N27/85
Inventor 郑国忠鲁振华高学勤杨慧强
Owner TIANJIN PIPE GROUP CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap