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Online crack detection device for roll for rolling, roll for rolling, and online crack detection method for roll for rolling

一种检测装置、辊轧的技术，应用在辊轧用辊领域，达到避免破坏事故的效果

Active Publication Date: 2020-07-31
PROTERIAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as described in Patent Document 3, the present inventors installed an AE sensor on the end of the shaft of the rolling roll and arranged the rolling roll in a rolling device, in order to detect the When detecting cracks, in rolling operations, the AE wave generated when the rolling roll pressurizes the steel plate becomes noise, and it is difficult to detect only the elastic wave accompanying the crack generated on the surface of the rolling roll

Method used

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  • Online crack detection device for roll for rolling, roll for rolling, and online crack detection method for roll for rolling
  • Online crack detection device for roll for rolling, roll for rolling, and online crack detection method for roll for rolling
  • Online crack detection device for roll for rolling, roll for rolling, and online crack detection method for roll for rolling

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Effect test

no. 1 approach

[0048] Below, use Figure 1 to Figure 9 , the online crack detection device for rolling rolls and the rolling rolls according to the first embodiment of the present invention will be described.

[0049] figure 1 It is a drawing which shows the arrangement|positioning of the online crack detection apparatus for rolling rolls and rolling rolls which concerns on the 1st Embodiment of this invention. exist figure 1 Among them, the rolling roll 1 has a trunk portion 2 for rolling a steel plate and a shaft portion 3 extending integrally from the trunk portion for supporting the rolling roll through a bearing (not shown). A composite structure in which the layer 4 and the inner layer 5 are integrated by metal bonding. An in-line crack detection unit 6 is arranged on one shaft portion of the roll for rolling, and the in-line crack detection unit 6 is provided with an AE sensor, a calculation unit, and a discrimination unit.

[0050] figure 2 It is a drawing which shows the funct...

no. 2 approach

[0073] Below, use Figure 12 , an online crack detection device for rolling rolls according to a second embodiment of the present invention will be described. Figure 12 A functional block diagram showing a crack detection device built in a rolling roll according to a second embodiment of the present invention. It has an AE sensor 10 that detects the elastic wave generated and progressing on the surface of the trunk part 2, and a calculation part 11 that calculates the characteristic value of the elastic wave detected by the AE sensor 10, and calculates the elastic wave calculated by the calculation part 11. The feature amount data of is transmitted from the communication unit 13 to the server provided with the discrimination unit provided outside the roll. The difference from the first embodiment is that the structure of the crack detection unit 4 disposed on the rolling roll is different. In the first embodiment, the discrimination unit disposed on the rolling roll is dispo...

no. 3 Embodiment approach

[0078] use Figure 9 The first embodiment described is an example in which a lithium-ion secondary battery is used for the power supply unit disposed at the end of the shaft portion of the roll for rolling, but other than that, as long as the mechanism for supplying power to the shaft portion of the roll for rolling can be provided For the rolling device and the vicinity of the rolling device, power may be supplied to the AE sensor, the calculation unit, the discrimination unit, and the communication unit from a power source outside the rolling roll. The specific power supply methods are contact power supply based on collector rings, magnetic field coupling, electric field coupling, radio wave, and laser non-contact power supply. In addition, independent power sources that generate electricity based on the environment can also be combined. Specific examples of ambient power generation include piezoelectric power generation using pressure between rolling rolls and bearings, fr...

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Abstract

Provided are a crack detection device that identifies occurrences of cracks and the progress of the cracks in the surface of the body part of a roll for rolling online and a roll for rolling providedwith the a crack detection function without having continuous disposition of many sensors on the roll for rolling and without having to make large modifications to a rolling device and the roll for rolling. The online crack detection device for the roll for rolling incorporated into a rolling device is characterized in that the roll for rolling has a body part and shaft parts extending from both ends of the body part as a unit, and the crack detection device is provided with the roll for rolling having, disposed on at least one shaft part, an AE sensor for detecting elastic waves generated onthe surface of the body part, and a calculation unit for calculating the characteristic quantities of the elastic waves detected by the AE sensor; and a discrimination unit for discriminating the elastic waves due to cracks occurring in the surface of the body part by the characteristic qualities.

Description

technical field [0001] The present invention relates to a technique for detecting crack defects existing on the surface of a rolling roll or directly below the surface by a sensor disposed on the rolling roll. In particular, it relates to the on-line detection of the surface, A crack detection device for cracks that develop and develop just below the surface, and a roll for rolling with a crack detection function. Background technique [0002] In the field of hot rolling of steel plates, sensors such as ultrasonic flaw detectors, eddy current flaw detectors, and acoustic emission (hereinafter referred to as AE) sensors have been developed to detect the existence of the surface of the trunk portion of the roll for rolling and / or directly below the trunk portion surface ( The following is a technique for cracking defects on the surface of the trunk. [0003] The background of the technology required to detect crack defects will be described. In the hot rolling process of st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C51/00B21B38/00G01N29/14
CPCB21B38/00B21C51/00G01N29/14G01N29/449G01N2291/2634G01N29/42G01N29/043B21B27/02B21B2203/18G01N29/4463
Inventor 佐藤桂司大岛昌彦服部敏幸逸见朝久辻正明
Owner PROTERIAL LTD
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