阅读说明：本技术 一种红外喷标替代磁粉人工查找缺陷定位的方法 (Method for manually searching defect location by replacing magnetic powder with infrared spray mark ) 是由 熊兵 魏鹏 黄昊 仇必宁 李桂元 孙昌松 陈建 于 2020-03-12 设计创作，主要内容包括：本发明公开了一种红外喷标替代磁粉人工查找缺陷定位的方法,首先将试件放置到加热装置上进行加热,待试件加热到指定温度之后送入检测装置处；然后检测装置通过红外扫描试件表面的方式检测试件,并把检测到试件呈现的温度梯度变化形成数据信号,数据信号输出至分析应用软件,分析应用软件测算出缺陷位置以及缺陷深度,分析应用软件再根据缺陷深度对比系统设置深度识别要求进行喷标标识,探伤速度比常规的漏磁检测速度要快50％；试件与检测器非接触式的,不需要增加额外的矫直设备,降低设备成本,并且非接触式减少设备的磨损,降低维修成本。(The invention discloses a method for manually searching defect location by replacing magnetic powder with an infrared spray mark, which comprises the following steps of firstly, placing a test piece on a heating device for heating, and sending the test piece to a detection device after the test piece is heated to a specified temperature; then the detection device detects the test piece by means of infrared scanning of the surface of the test piece, changes of the temperature gradient presented by the detected test piece are formed into data signals, the data signals are output to analysis application software, the analysis application software calculates the position and the depth of the defect, the analysis application software carries out mark spraying according to the depth identification requirement set by the defect depth comparison system, and the flaw detection speed is 50% faster than the conventional magnetic leakage detection speed; the test piece and the detector are in non-contact type, extra straightening equipment does not need to be added, equipment cost is reduced, equipment abrasion is reduced in a non-contact mode, and maintenance cost is reduced.)

1. The method for manually searching defect location by replacing magnetic powder with infrared jet marks is characterized by comprising the following steps

Step 1, placing a test piece on a heating device for heating, and sending the test piece to a detection device after the test piece is heated to a specified temperature;

and 2, detecting the test piece by the detection device in a mode of infrared scanning of the surface of the test piece, forming a data signal by the temperature gradient change presented by the detected test piece, outputting the data signal to analysis application software, measuring and calculating the defect position and the defect depth by the analysis application software, and spraying mark identification by the analysis application software according to the depth identification requirement set by the defect depth comparison system.

2. The method for manually searching for the defect location by replacing the magnetic powder with the infrared jet marks according to claim 1, wherein in the step 1, shot blasting is performed on the surface of the test piece before the test piece is placed on a heating device for heating, and after the shot blasting is performed on the test piece, spraying is performed on the surface of the test piece to remove an oxide layer and chips on the surface of the test piece.

3. The method for manually searching for the defect location by replacing the magnetic powder with the infrared spray mark according to claim 1, wherein in the step 1, the detection device comprises a detector for arranging a plurality of cameras at intervals and a computer console containing the analysis application software in the step 2, and the detector outputs data to the analysis application software of the computer console; the scanning angles of the plurality of cameras are integrally not less than 360 degrees, and the scanning angle of a single camera is not less than 90 degrees.

4. The method according to claim 3, wherein the detector has a cooling function, the detector is cooled by air, and the test piece is cooled before being scanned by the camera.

5. The method for manually searching for the defect location by replacing the magnetic powder with the infrared spray mark according to claim 4, wherein the front end and the rear end of the detector are respectively provided with a roller feeder, the roller feeders are used for transporting the test piece, and the detector realizes non-contact detection of the test piece through the roller feeders.

Technical Field

The invention relates to the field of steel flaw detection, in particular to a method for manually searching and positioning defects by replacing magnetic powder with infrared jet marks.

Background

The magnetic powder flaw detection is a traditional flaw detection method, the principle of which is a method utilizing the interaction between the leakage magnetic field and the magnetic powder at the flaw position of a workpiece, and the method utilizes the difference between the magnetic conductivity of the surface and the near-surface flaw (such as cracks, slag inclusion, hairlines and the like) of a steel product and the magnetic conductivity of steel, after magnetization, the magnetic field at the discontinuous position of the materials generates Kawasaki deformation to form a part of magnetic flux leakage position on the surface of the workpiece to generate the leakage magnetic field, thereby attracting the magnetic powder to form magnetic powder accumulation-magnetic marks at the flaw position, showing the position and the shape of the flaw under the proper illumination condition, and then manually marking. The defects of manual label missing, high working strength, poor defect depth recognition, low efficiency and the like exist.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a method for manually searching defect location by replacing magnetic powder with an infrared spray mark, which replaces a conventional magnetic flux leakage detection method.

The technical scheme is as follows: the invention relates to a method for manually searching defect location by replacing magnetic powder with an infrared spray mark, which comprises the following steps

Step 1, placing a test piece on a heating device for heating, and sending the test piece to a detection device after the test piece is heated to a specified temperature;

and 2, detecting the test piece by the detection device in a mode of infrared scanning of the surface of the test piece, forming a data signal by the temperature gradient change presented by the detected test piece, outputting the data signal to analysis application software, measuring and calculating the defect position and the defect depth by the analysis application software, and spraying mark identification by the analysis application software according to the depth identification requirement set by the defect depth comparison system.

Further, before placing the test piece on heating device and heating, throw the ball processing to the test piece surface, treat that the test piece is thrown the ball and handle afterwards, spray the processing to the test piece surface to get rid of oxide layer and piece on the test piece surface.

Further, the detection device comprises a detector for arranging a plurality of cameras at intervals and a computer console containing the analysis application software in the step 2, and the detector outputs data to the analysis application software of the computer console; the scanning angles of the plurality of cameras are integrally not less than 360 degrees, and the scanning angle of a single camera is not less than 90 degrees.

Furthermore, the detector has a cooling function, the cooling mode of the detector is air cooling, and the test piece is cooled firstly and then scanned by the camera when passing through the detector.

Furthermore, the front end and the rear end of the detector are respectively provided with a roller conveying machine, the roller conveying machines are used for conveying the test piece, and the detector realizes non-contact detection of the test piece through the roller conveying machines.

Has the advantages that: compared with the prior art, the invention has the advantages that: the flaw detection speed is 50% higher than the conventional magnetic flux leakage detection speed; the test piece and the detector are in non-contact type, extra straightening equipment does not need to be added, equipment cost is reduced, equipment abrasion is reduced in a non-contact mode, and maintenance cost is reduced.

Drawings

FIG. 1 is an illustration of the defect location of the manual search of infrared jet marks instead of magnetic powder.

Detailed Description

As shown in figure 1, a method for manually searching for defect location by replacing magnetic powder with an infrared spray mark comprises the steps of firstly, carrying out shot blasting treatment on the surface of a test piece before the test piece with the diameter of 50-200mm and the length of 3-12m is placed on a heating device for heating, and carrying out spray treatment on the surface of the test piece after the test piece is subjected to shot blasting treatment so as to remove an oxide layer and fragments on the surface of the test piece;

then, the test piece is conveyed to a heating device for heating at the lowest detection speed of 0.3m/s and the fastest 1.5m/s, the test piece is conveyed to a detection device after being heated to any constant temperature between 0 and 50 ℃,

then, the induction heating electronic infrared detection device detects the test piece in a mode of infrared scanning of the surface of the test piece, changes of temperature gradients in a temperature drop process presented by the detected test piece are formed into data signals, the data signals are output to analysis application software, the analysis application software calculates defects with the defect positions and the defect depth and width exceeding 0.2 x 15mm according to a data model between the temperature drop gradients stored by the analysis application software and the defect depth and position, and the analysis application software carries out mark spraying according to the depth identification requirements set by a defect depth comparison system.

The detection device comprises a detector for arranging a plurality of cameras at intervals and a computer console containing analysis application software, and the detector outputs data to the analysis application software of the computer console; the scanning angles of the plurality of cameras are integrally not less than 360 degrees, and the scanning angle of a single camera is not less than 90 degrees.

In order to obtain a more intuitive image with larger contrast on analysis application software, the detector has a cooling function, the cooling mode of the detector is air cooling, and the test piece is cooled before being scanned by the camera when passing through the detector.

Because the surface temperature of the test piece is reduced quickly after the test piece is cooled, and the temperature of the defect is reduced slowly, the image formed by the temperature data of the depression on the analysis application software is visual and has high contrast, and the screening precision is improved.

In order to test the test piece in a non-contact mode of the detector, the front end and the rear end of the detector are respectively provided with a roller feeding machine, and the roller feeding machines are used for transporting the test piece. The test piece and the detector are in non-contact type, extra straightening equipment does not need to be added, equipment cost is reduced, equipment abrasion is reduced in a non-contact mode, and maintenance cost is reduced.