CN111141819A - Method for detecting damage to inner wall of mold body - Google Patents
Method for detecting damage to inner wall of mold body Download PDFInfo
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- CN111141819A CN111141819A CN201910892104.0A CN201910892104A CN111141819A CN 111141819 A CN111141819 A CN 111141819A CN 201910892104 A CN201910892104 A CN 201910892104A CN 111141819 A CN111141819 A CN 111141819A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a method for detecting damage of an inner wall of a die body, which mainly comprises the following steps of cleaning the outer wall of the inner part of the die to be detected, coating a coupling agent, contacting a detection position of a detection head with the outer wall to be detected, moving the detection head on the surface to be detected of the die along a preset track, transmitting detection information to a detection system, judging a detection threshold value displayed by an ultrasonic detector, and entering the next detection area under the condition that the detection threshold value is not exceeded; when the detection threshold value is larger than the safety threshold value, recording a first numerical value of the detection threshold value, marking a detection point of the mold, then entering the next stage, cleaning the inner wall of the mold at the marking position, coating the inner wall with the coupling agent, repeating the steps, comparing the steps with the first recorded numerical value, determining that the inside of the mold has defects when the second detection numerical value and the first numerical value are both above the safety threshold value range, and positioning the defects inside the mold through a symmetry method, thereby reducing the risk of explosion when the mold is used.
Description
Technical Field
The invention relates to the technical field of molds, in particular to a method for detecting damage to an inner wall of a mold body.
Background
The die is various dies and tools for obtaining required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. The blank is formed into a tool with a specific shape and size under the action of external force. The method is widely applied to blanking, die forging, cold heading, extrusion, powder metallurgy part pressing, pressure casting and the forming processing of compression molding or injection molding of products such as engineering plastics, rubber, ceramics and the like.
The die is a precise tool, has a complex shape, bears the expansion force of a blank, and has higher requirements on structural strength, rigidity, surface hardness, surface roughness and processing precision. However, at present, whether the quality inside the mold is defective or not can only be observed on the surface of the mold through naked eyes by a detector, and the quality inspection has certain defects, so that potential safety hazards are easy to omit subsequently, and the method is more dangerous especially when the mold needs to be heated, cooled or pressurized.
Disclosure of Invention
The present invention is directed to a method for detecting damage to an inner wall of a mold body, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a method for detecting damage to the inner wall of a mold body comprises the following steps:
s1: cleaning the outer wall of the to-be-detected interior of the mold, and coating a coupling agent;
s2: the detection position of the detection head is contacted with the outer wall to be detected, and the couplant is filled between the detection head and the mold;
s3: moving the probe on the surface to be detected of the mold along a preset track, and transmitting detection information to a detection system, wherein the detection system is an ultrasonic detector;
s4, judging the detection threshold value displayed by the ultrasonic detector, and entering the next detection area under the condition that the detection threshold value is not exceeded; when the detection threshold is larger than the safety threshold, recording a first numerical value of the detection threshold, marking a detection point of the mold, and then entering the next stage, wherein the safety threshold is an on-line threshold with defects;
s4, cleaning the inner wall of the mould at the marking position and coating the inner wall with the coupling agent;
and S5, repeating the steps S2 and S3, comparing the first recorded value with the second recorded value, and judging that the interior of the mold has a defect when the second detected value and the first value are both above the safety threshold range.
Further, the thickness of the couplant coating is 5mm-10 mm.
Further, the predetermined trajectory is at least one of a straight repetition, a curved detour, and a zigzag movement.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the internal defects of the die are detected by using the ultrasonic detector, and the internal defects of the die are positioned by using a symmetry method, so that the die can be more safe and stable when in use, and the risk of bursting when the die is in use is reduced.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment provides a technical scheme: a method for detecting damage to the inner wall of a mold body comprises the following steps:
firstly, cleaning the outer wall of the to-be-detected inner part of a die, wherein the outer wall is cleaned to be free of oil stains and iron powder, and then coating a couplant, wherein the coating height of the couplant is 5 mm;
secondly, contacting a detection position of a probe with the outer wall to be detected, and filling the couplant between the probe and the mold, wherein optionally, the detection position of the probe should be immersed in the couplant;
thirdly, the probe is reciprocated along a straight line to move on the surface to be detected of the die, and detection information is transmitted to a detection system, wherein the detection system is an ultrasonic detector, and in the embodiment, the optional ultrasonic detector is an ASUT100 portable ultrasonic flaw detector;
and thirdly, judging the detection threshold value displayed by the ultrasonic detector, and entering the next detection area under the condition that the detection threshold value is not exceeded.
Example two
The embodiment provides a technical scheme: a method for detecting damage to the inner wall of a mold body comprises the following steps:
firstly, cleaning the outer wall of the to-be-detected inner part of a die, wherein the outer wall is cleaned to be free of oil stains and iron powder, and then coating a couplant, wherein the coating height of the couplant is 6 mm;
secondly, contacting a detection position of a probe with the outer wall to be detected, and filling the couplant between the probe and the mold, wherein optionally, the detection position of the probe should be immersed in the couplant;
thirdly, the probe is reciprocated along a straight line to move on the surface to be detected of the die, and detection information is transmitted to a detection system, wherein the detection system is an ultrasonic detector, and in the embodiment, the optional ultrasonic detector is an ASUT100 portable ultrasonic flaw detector;
fourthly, judging a detection threshold value displayed by the ultrasonic detector, recording a first numerical value when the detection threshold value is greater than a safety threshold value, marking a detection point of the die, and entering the next stage, wherein the safety threshold value is an upper line of a defect threshold value, the upper line of the defect threshold value is an upper line of a defect threshold value preset by the ultrasonic flaw detector, and the upper line of the defect threshold value is various defects specified in a defect list;
fourthly, cleaning the inner wall of the mould at the marking position, wherein the cleaning requirement of the inner wall is consistent with that of the outer wall, and the inner wall is coated with the coupling agent, and the thickness of the coupling agent is 6 mm;
and fifthly, repeating the second step and the third step, comparing the second step with the first recorded numerical value, and determining that the interior of the mold has defects when the second detected numerical value and the first numerical value are both above the safety threshold range.
Implementation III
The embodiment provides a technical scheme: a method for detecting damage to the inner wall of a mold body comprises the following steps:
firstly, cleaning the outer wall of the to-be-detected inner part of a die, wherein the outer wall is cleaned to be free of oil stains and iron powder, and then coating a couplant, wherein the coating height of the couplant is 10 mm;
secondly, contacting a detection position of a probe with the outer wall to be detected, and filling the couplant between the probe and the mold, wherein optionally, the detection position of the probe should be immersed in the couplant;
thirdly, the probe is linearly reciprocated to move on the surface to be detected of the die, and detection information is transmitted to a detection system, wherein the detection system is an ultrasonic detector, and in the embodiment, the optional ultrasonic detector is an ASUT-330 precision ultrasonic flaw detector;
fourthly, judging a detection threshold value displayed by the ultrasonic detector, recording a first numerical value when the detection threshold value is greater than a safety threshold value, marking a detection point of the die, and entering the next stage, wherein the safety threshold value is an upper line of a defect threshold value, the upper line of the defect threshold value is an upper line of a defect threshold value preset by the ultrasonic flaw detector, and the upper line of the defect threshold value is various defects specified in a defect list;
fourthly, cleaning the inner wall of the mould at the marking position, wherein the cleaning requirement of the inner wall is consistent with that of the outer wall, and the inner wall is coated with the coupling agent, and the thickness of the coupling agent is 10 mm;
and fifthly, repeating the second step and the third step, comparing the second step with the first recorded numerical value, and determining that the interior of the mold has defects when the second detected numerical value and the first numerical value are both above the safety threshold range.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A method for detecting damage to the inner wall of a mold body is characterized by comprising the following steps:
s1: cleaning the outer wall of the to-be-detected interior of the mold, and coating a coupling agent;
s2: the detection position of the detection head is contacted with the outer wall to be detected, and the couplant is filled between the detection head and the mold;
s3: moving the probe on the surface to be detected of the mold along a preset track, and transmitting detection information to a detection system, wherein the detection system is an ultrasonic detector;
s4, judging the detection threshold value displayed by the ultrasonic detector, and entering the next detection area under the condition that the detection threshold value is not exceeded; when the detection threshold is larger than the safety threshold, recording a first numerical value of the detection threshold, marking a detection point of the mold, and then entering the next stage, wherein the safety threshold is an on-line threshold with defects;
s4, cleaning the inner wall of the mould at the marking position and coating the inner wall with the coupling agent;
and S5, repeating the steps S2 and S3, comparing the first recorded value with the second recorded value, and judging that the interior of the mold has a defect when the second detected value and the first value are both above the safety threshold range.
2. The method for detecting damage to the inner wall of the mold body according to claim 1, wherein: the thickness of the couplant coating is 5mm-10 mm.
3. The method for detecting damage to the inner wall of the mold body according to claim 1, wherein: the predetermined trajectory is at least one of a straight-line repetition, a curved detour, and a zigzag movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910892104.0A CN111141819A (en) | 2019-09-20 | 2019-09-20 | Method for detecting damage to inner wall of mold body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910892104.0A CN111141819A (en) | 2019-09-20 | 2019-09-20 | Method for detecting damage to inner wall of mold body |
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| CN111141819A true CN111141819A (en) | 2020-05-12 |
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| CN201910892104.0A Pending CN111141819A (en) | 2019-09-20 | 2019-09-20 | Method for detecting damage to inner wall of mold body |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721743A (en) * | 2012-06-26 | 2012-10-10 | 衡阳华菱钢管有限公司 | Ultrasonic flaw detection method for detecting defects of longitudinal inner walls of thin-walled steel tubes |
| CN104792876A (en) * | 2015-04-16 | 2015-07-22 | 西安热工研究院有限公司 | Nondestructive testing method for peel-off of oxidation layer on inner wall of boiler tube |
| CN108387639A (en) * | 2018-01-05 | 2018-08-10 | 航天特种材料及工艺技术研究所 | A kind of lossless detection method of multi-layer bonded component |
| CN108872380A (en) * | 2018-06-04 | 2018-11-23 | 航天特种材料及工艺技术研究所 | The bonding defect detecting method of multi-layer bonded component |
| CN109557189A (en) * | 2018-12-20 | 2019-04-02 | 上海中船三井造船柴油机有限公司 | Reference block and method of detection for heavy wall steel high pressure seamless pipe ultrasonic inspection |
| CN109765296A (en) * | 2018-12-29 | 2019-05-17 | 内蒙古北方重工业集团有限公司 | Thick-wall tube internal flaw ultrasound detection 3-D positioning method |
| CN110441389A (en) * | 2019-07-16 | 2019-11-12 | 安徽扬天金塑新能源装备股份公司 | A kind of big fillet ultrasonic test method of high-pressure bottle |
| CN110625322A (en) * | 2019-08-23 | 2019-12-31 | 北京星航机电装备有限公司 | Method for quickly positioning and accurately repairing internal defect part of complex casting |
| CN113267565A (en) * | 2021-06-24 | 2021-08-17 | 大冶特殊钢有限公司 | Ultrasonic flaw detection device for ultra-thick-wall steel pipe |
-
2019
- 2019-09-20 CN CN201910892104.0A patent/CN111141819A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721743A (en) * | 2012-06-26 | 2012-10-10 | 衡阳华菱钢管有限公司 | Ultrasonic flaw detection method for detecting defects of longitudinal inner walls of thin-walled steel tubes |
| CN104792876A (en) * | 2015-04-16 | 2015-07-22 | 西安热工研究院有限公司 | Nondestructive testing method for peel-off of oxidation layer on inner wall of boiler tube |
| CN108387639A (en) * | 2018-01-05 | 2018-08-10 | 航天特种材料及工艺技术研究所 | A kind of lossless detection method of multi-layer bonded component |
| CN108872380A (en) * | 2018-06-04 | 2018-11-23 | 航天特种材料及工艺技术研究所 | The bonding defect detecting method of multi-layer bonded component |
| CN109557189A (en) * | 2018-12-20 | 2019-04-02 | 上海中船三井造船柴油机有限公司 | Reference block and method of detection for heavy wall steel high pressure seamless pipe ultrasonic inspection |
| CN109765296A (en) * | 2018-12-29 | 2019-05-17 | 内蒙古北方重工业集团有限公司 | Thick-wall tube internal flaw ultrasound detection 3-D positioning method |
| CN110441389A (en) * | 2019-07-16 | 2019-11-12 | 安徽扬天金塑新能源装备股份公司 | A kind of big fillet ultrasonic test method of high-pressure bottle |
| CN110625322A (en) * | 2019-08-23 | 2019-12-31 | 北京星航机电装备有限公司 | Method for quickly positioning and accurately repairing internal defect part of complex casting |
| CN113267565A (en) * | 2021-06-24 | 2021-08-17 | 大冶特殊钢有限公司 | Ultrasonic flaw detection device for ultra-thick-wall steel pipe |
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Application publication date: 20200512 |
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