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Device and method for detecting mechanical properties of cold-rolled steel strip

A technology of cold-rolled steel strip and detection device, which is applied in the direction of measuring device, using repetitive force/pulse force to test the strength of materials, scientific instruments, etc. Inaccurate strength test and other problems, to achieve the effect of accurate test and improve accuracy

Active Publication Date: 2018-11-13
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a device and method for detecting the mechanical properties of cold-rolled steel strips, which solves the inaccurate testing of the bending fatigue strength of cold-rolled steel strips in the prior art and the inability to simulate the actual force of the weld seam during steel strip production state technical problems, achieved the technical effect of accurately testing the bending fatigue strength of cold-rolled steel strips

Method used

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  • Device and method for detecting mechanical properties of cold-rolled steel strip
  • Device and method for detecting mechanical properties of cold-rolled steel strip
  • Device and method for detecting mechanical properties of cold-rolled steel strip

Examples

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Effect test

Embodiment 1

[0041] For a cold-rolling and pickling-rolling online production line in a steel plant, the radius of curvature of the driving roll 31, the bending roll 2, and the driven roll 32 is 100mm, and the tension of the cold-rolled steel strip 200 is 12kg / mm 2 , When the motor 7 rotates 15 times, the welding seam does not produce cracks or fractures, and the mechanical properties of the welding seam are qualified.

Embodiment 2

[0043] For a cold rolling continuous withdrawal production line in a steel plant, the radius of curvature of the driving roll 31, the bending roll 2, and the driven roll 32 is 200mm, and the tension of the cold rolled steel strip 200 is 8kg / mm 2 , When the motor 7 rotates 125 times, the weld does not produce cracks or breaks, and the mechanical properties of the weld are qualified.

Embodiment 3

[0045] For a cold-rolled galvanizing line of a steel plant, the radius of curvature of the driving roll 31, the bending roll 2, and the driven roll 32 is 200mm, and the tension of the cold-rolled steel strip 200 is 6kg / mm 2 , When the motor 7 rotates 72.5 times, the weld does not produce cracks or breaks, and the mechanical properties of the weld are qualified.

[0046] The beneficial effects of this application are as follows:

[0047] In the apparatus and method for detecting mechanical properties of cold-rolled steel strip provided by the present application, the bending roller slides up and down to compress the cold-rolled steel strip so that the outer side of the steel strip receives a compression force; the tension component acts on the driven roller Provide a constant dynamic load so that the tension roller provides the tension of the cold-rolled steel strip, so that the inner side of the cold-rolled steel strip is tensioned; at the same time, the driving roller is driven by ...

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Abstract

The invention discloses a cold-rolled steel belt mechanical property detection device and method. The detection device comprises a body; a bended roller, which is slidingly fixed on the body, wherein the bended roller can rise or descend relative to the body and is provided with an upper bended roller and a lower bended roller for clamping a cold-rolled steel belt; a tension roller, which is arranged on the body and can horizontally slide relative to the body, wherein the tension roller comprises a driving roller, which is fixed relative to the body is capable of rotating around the core shaft of the driving roller, and a driven roller, which is fixed on the body and is capable of horizontally sliding relative to the body; and a tension assembly, which is connected to the driven roller so as to apply a constant tensile force on the driven roller. In the prior art, the tests on bending fatigue strength of cold-rolled steel belt are not accurate, the actual stress state of weld seams during the production process of steel belt production cannot be simulated, and the provided device and method solve the problems mentioned above and are capable of precisely measuring the bending fatigue strength of cold-rolled steel belt.

Description

Technical field [0001] The invention relates to the technical field of mechanical property detection, in particular to a cold-rolled steel strip mechanical property detection device and method. Background technique [0002] In the cold-rolled plate production process, in order to ensure the continuous operation of the production line, the pickling cold-rolling line, continuous annealing line, galvanizing line and other production lines usually weld the head and tail of the steel strip. During the rolling process, the weld is subjected to a lot of stress. In addition to the rolling force, it also bears the tensile force and repeated bending force. In order to prevent the weld from breaking during the rolling process, it is necessary to test the mechanical properties of the weld in advance. The fatigue strength test device in the prior art is only a repeated bending test under constant load, the test is inaccurate, the structure is complicated, and it cannot simulate the actual st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/32G01N3/02
Inventor 钟如涛王辉牟文广刘念
Owner 武汉钢铁有限公司
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