CN103364528A - On-line detection method for laser cladding process by directly calibrating and detecting temperature field melting bath width with test sample - Google Patents
On-line detection method for laser cladding process by directly calibrating and detecting temperature field melting bath width with test sample Download PDFInfo
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- CN103364528A CN103364528A CN2012101033107A CN201210103310A CN103364528A CN 103364528 A CN103364528 A CN 103364528A CN 2012101033107 A CN2012101033107 A CN 2012101033107A CN 201210103310 A CN201210103310 A CN 201210103310A CN 103364528 A CN103364528 A CN 103364528A
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Abstract
The invention particularly relates to a real-time on-line detection method for a laser cladding process. The traditional on-line detection method needs a special metering mechanism to calibrate the instrument, which increases the expenses and is very inconvenient. The invention provides an on-line detection method for a laser cladding process by directly performing calibration by comparing a test sample with information acquired in a testing process. In the test calibration process, people only determine the proportional relation between the actual melting bath region of the test sample and the corresponding region in the detected information, and does not determine the definite melting temperature of the workpiece material. In the detection process, the system acquires information on the range of the workpiece surface in the molten state, and the accurate temperature value and distribution thereof are not required. The invention can be used for avoiding some calibration work performed by the professional metering mechanism, detection errors caused by temperature calibration errors, and misjudgment caused by variations of actual melting temperature and the like due to variations of materials or technological conditions.
Description
Technical field
The present invention relates to a kind of online test method, specifically, relate to a kind of method of laser cladding process being carried out the real-time online detection.
Background technology
Laser melting and coating process can carry out surface modification, improves surface of the work performance and serviceable life thereof, can also repair precious metal accessory, directly make classic method and be difficult for particulate metal part of being shaped.Because laser melting coating is a very complicated technological process, the fluctuation that some factor is small, thereby the variation that will cause the laser melting coating molten bath cause between quality unstable; In addition, for the workpiece of complicated structure, the hot conduction condition of different parts is different, and the molten bath that causes laser melting coating to form is also different, etc.These problems affect workpiece qualities.
The measure that addresses these problems is that laser cladding process is carried out real-time online control.At present, the idea that people are general is real-time online detection laser cladding state, obtains the status flag data, according to the real-time adjusting process parameter of the status flag data that detect, to improve and stable workpiece quality.Generally need prior process to the demarcation of detecting instrument, could the acknowledgement state characteristic.But because workpiece (substrate, cladding powder) material is different, the temperature that fusing occurs is also different, and radiation signal is also different under uniform temp; The heating and cooling condition is different, the fusing degree of superheat and to solidify degree of supercooling different; In addition, sensor is different to the condition of workpiece sensing, and the signal power that sensor receives also changes.Therefore, before laser cladding process detects under different technology conditions to every kind of workpiece, all need to special metering mechanism instrument to be demarcated, need cost more human and material resources and financial resources, also very inconvenient, greatly restricted applying of laser melting and coating process.
Summary of the invention
In order to address the above problem, effectively realize laser cladding process is carried out real-time online control, the present invention proposes a kind of laser cladding process online test method that compares demarcation by testing the information of obtaining in and the test direct with sample.
The technical scheme of patent of the present invention is: for certain work piece substrate and cladding powder material and testing conditions, carry out laser melting coating and process thereof and detect online test, the detection information direct and corresponding the features relevant data of sample compares, with calibration process detect the data area and and actual pool width between proportionate relationship, on this basis workpiece laser molten bath process is carried out real-time online and detect the needed data of Real-time Obtaining process control.
When process detected, what people often at first considered was to detect to such an extent that whether data are accurate, and had ignored the real purpose that detects.So people are general to carry out the accuracy demarcation in special metering mechanism to detecting instrument first, and then with going to measure through the detecting instrument of demarcating, expectation is detected data accurately.Yet, often can not obtain in practice or can not often obtain easily accurately data.In addition, the data that generally are used for technological process control often are not the absolute values of the information that detects, need to carry out analytical calculation, perhaps are exactly a relative value.In laser cladding process, what need to know is pool width, therefore, only needs to obtain the information of the above scope of temperature of fusion in the detection information, and does not require and obtain accurately temperature value and distribution thereof.This is from people are different with the purpose of the true temperature of instrument detection surface of the work usually.
Because the present invention need to not detect accurately temperature value and distribution thereof in technological process, do not need to determine the represented definite temperature of detection information, thereby when Experimental Calibration, do not need to understand the definite temperature of fusion of workpiece material, only determine data area corresponding with zone, actual cladding molten bath in the information data that detects and proportionate relationship between the two.
The beneficial effect of patent of the present invention is: the purpose that in abstracto relative process is detected has an important breakthrough, is that purpose changes that to obtain useful data be purpose into from obtaining accurate data; Can avoid changing because of physical conditions such as material, workpiece states the staking-out work of the professional metering mechanism that causes; Can avoid the detection error that causes because of the temperature calibration error, what is more important can avoid variation because of the actual chemical constitution of material or process conditions to cause the thermophysical parameter such as actual temperature of fusion to change the erroneous judgement that causes.
Description of drawings
Without accompanying drawing.
Embodiment
Before certain class workpiece is carried out laser melting coating, under specified criteria, use first and all the same test blocks and powder carries out laser melting coating and process detects test online of the substrate of workpiece and cladding powder material, acquisition process detects information and corresponding laser melting coating sample online, then directly compare with the detection information that obtains with corresponding test findings, the data area that detects with calibration process and and corresponding actual melting range between proportionate relationship, use again this calibration result as foundation, the design Some Related Algorithms, the workpiece laser cladding process is carried out real-time online detect the needed data of Real-time Obtaining process control.
Claims (3)
1. one kind is carried out the method that real-time online detects to laser cladding process, can detect in real time the status flag information of laser cladding process, it is characterized in that: the zone, molten bath of directly demarcating detection information with sample.
2. laser cladding process according to claim 1 carries out the method that real-time online detects, its feature also has: when Experimental Calibration, only determine data area corresponding with zone, actual molten bath in the information data that detects and proportionate relationship between the two, and the definite temperature of fusion of uncertain workpiece material.
3. laser cladding process according to claim 1 carries out the method that real-time online detects, and its feature also has: when process detected, the system acquisition workpiece was in the information of the scope more than the temperature of fusion, and did not require and obtain accurately temperature value and distribution thereof.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101033107A CN103364528A (en) | 2012-04-10 | 2012-04-10 | On-line detection method for laser cladding process by directly calibrating and detecting temperature field melting bath width with test sample |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101033107A CN103364528A (en) | 2012-04-10 | 2012-04-10 | On-line detection method for laser cladding process by directly calibrating and detecting temperature field melting bath width with test sample |
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| CN103364528A true CN103364528A (en) | 2013-10-23 |
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| CN2012101033107A Pending CN103364528A (en) | 2012-04-10 | 2012-04-10 | On-line detection method for laser cladding process by directly calibrating and detecting temperature field melting bath width with test sample |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU174368U1 (en) * | 2016-12-28 | 2017-10-11 | Акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" АО "НПО "ЦНИИТМАШ" | SAMPLE WITNESS FOR RESEARCH OF THREE-DIMENSIONAL PARTS PRODUCED BY THE METHOD OF SELECTIVE LASER MELTING |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19919688A1 (en) * | 1999-04-30 | 2000-11-02 | Rheinmetall W & M Gmbh | Process for coating the inside of a gun barrel |
| EP1127958A2 (en) * | 2000-02-26 | 2001-08-29 | Volkswagen Aktiengesellschaft | Process for coating a surface |
| CN1403822A (en) * | 2002-09-26 | 2003-03-19 | 浙江大学 | In-situ detection of product quality index in Chinese medicine production process |
-
2012
- 2012-04-10 CN CN2012101033107A patent/CN103364528A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19919688A1 (en) * | 1999-04-30 | 2000-11-02 | Rheinmetall W & M Gmbh | Process for coating the inside of a gun barrel |
| EP1127958A2 (en) * | 2000-02-26 | 2001-08-29 | Volkswagen Aktiengesellschaft | Process for coating a surface |
| CN1403822A (en) * | 2002-09-26 | 2003-03-19 | 浙江大学 | In-situ detection of product quality index in Chinese medicine production process |
Non-Patent Citations (1)
| Title |
|---|
| 杨柳杉等: "基于CCD的激光熔覆熔池宽度的在线检测研究", 《激光技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU174368U1 (en) * | 2016-12-28 | 2017-10-11 | Акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" АО "НПО "ЦНИИТМАШ" | SAMPLE WITNESS FOR RESEARCH OF THREE-DIMENSIONAL PARTS PRODUCED BY THE METHOD OF SELECTIVE LASER MELTING |
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Application publication date: 20131023 |