CN206567687U - Detect the penetration control device of frequency of oscillation in a kind of pulse laser exciting TIG molten baths - Google Patents
Detect the penetration control device of frequency of oscillation in a kind of pulse laser exciting TIG molten baths Download PDFInfo
- Publication number
- CN206567687U CN206567687U CN201621222464.8U CN201621222464U CN206567687U CN 206567687 U CN206567687 U CN 206567687U CN 201621222464 U CN201621222464 U CN 201621222464U CN 206567687 U CN206567687 U CN 206567687U
- Authority
- CN
- China
- Prior art keywords
- laser
- frequency
- oscillation
- tig
- pulse laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Arc Welding In General (AREA)
- Laser Beam Processing (AREA)
Abstract
The utility model belongs to automatic welding technique field, and the penetration control device of frequency of oscillation is detected in a kind of pulse laser exciting TIG molten baths.The device of structure is mainly made up of structure laser reflection imaging system with laser vision acquisition system and pulse laser.In structure laser reflection imaging system, laser irradiates dot matrix laser in weld pool surface, is imaged in after being reflected through weld pool surface on imaging screen；Pulse laser is radiated at weld pool surface, give molten bath certain impact power, molten bath is set to produce vibration, dot matrix laser changes, and the change procedure of dot matrix laser on imaging screen is recorded and gathered using CCD, the data of record are transported in computer in real time, computer goes out Bath vibration characteristic frequency by the Program extraction write in advance, and appropriate welding parameter is selected according to Bath vibration frequency, then welding parameter signal is sent to tig arc welding machine, change the welding parameter of welding machine, realize the real-time control to joint penetration.The utility model improves the stability of Bath vibration and detects the accuracy of Bath vibration frequency, realizes the real-time control to joint penetration.
Description
Technical field
The present invention relates to the penetration control device that frequency of oscillation is detected in a kind of pulse laser exciting TIG molten baths, belong to automatic
Change welding technology field.
Background technology
The key of welding process quality control is the penetration control of weld seam and its shaping, i.e., according to the actual shape of welding process
State, makes the geometric parameter of sign appearance of weld close to or up expected setting value according to certain rule.So welding penetration
Control is a big research direction of welding technique, and the purpose is to the appearance of weld for ensureing the reliable penetration of weldment, obtaining uniformity.
The key of this work is how to extract the information of reflection penetration signal.But, because the fusion penetration of weld seam is that weldment is added by electric arc
Under in the case of heat, the dynamic physical amount determined by high temperature fluent metal Molten Pool Shape is highly difficult to its direct measurement,
Indirect detection can only be made by related physical quantity.At present, the scholars for carrying out welding penetration control research, main research hand
Section has field of welding temperature detection, visual pattern detection, ultrasonic wave, electric arc sound detection and Bath vibration detection etc..Wherein vision is examined
Survey method and Bath vibration receive much attention due to being directly associated with pool size.
The method of Bath vibration detection is to impact molten bath by additional force, causes Weld Pool Oscillation, then detects molten bath
A kind of experimental method of relation between frequency of oscillation and fusion penetration.Bath vibration detection is shaken major problem is that how to produce molten bath
Swing and how to detect Bath vibration frequency.Most of research is all to entering to molten bath using pulse current or frequency conversion electric current at present
Row is agitated, and obtains Bath vibration frequency by detecting arc voltage or arc signal.Such method is moving welding
During, the arc force reduction that electric arc can shift and cause molten bath to be subject to makes the reduction of Bath vibration level, so as to cause to melt
Pond oscillatory instability, so being only applicable to fixed point welding.And precision of the arc voltage with arc signal in itself is relatively low, this meeting
Cause it is relatively low by measuring the frequency of oscillation degree of accuracy that arc voltage and arc signal obtain, for research Bath vibration frequency with
Relation between fusion penetration can produce larger error.
The content of the invention
It is accurate in order to solve instability problem and measurement arc voltage and arc voltage that electric current agitated to molten bath
The problem of spending relatively low, the present invention detects in a kind of pulse laser exciting TIG molten baths the penetration control device of frequency of oscillation, to improve
The degree of accuracy of frequency is shaken in the stability of Bath vibration and detection molten bath, accurately realizes the real-time control to joint penetration.
The technical solution adopted in the present invention is：Detect the penetration control of frequency of oscillation in a kind of pulse laser exciting TIG molten baths
Device processed, the device is mainly made up of structure laser reflection imaging system with laser vision acquisition system and pulse laser.
In structure laser reflection imaging system, laser is placed in XOZ planes, with workpiece level direction into 30 °.Wherein laser is leaned on
One end of nearly workpiece to the vertical height of workpiece is 20mm, and the horizontal range to welding gun is 48m.The rated voltage that laser is used
For 3 V, power 200mW, wavelength 650nm.Imaging screen is placed on welding gun opposite side and parallel to YOZ planes, and its size is 47cm
×29cm.TIG welding guns are vertical with workpiece planarization, and at a distance of 10mm.Laser vision acquisition system is main by being placed after imaging screen
CCD industrial cameras and computer composition, ccd video camera spectral response range be 340 ~ 1030 nm, signal to noise ratio is 38
DB, dynamic range is, more than 70 dB, the laser molten pool reflected image of change can be recorded in real time.It is to reduce arc light to laser simultaneously
Molten bath reflected image interference, obtains the bandpass filter that 650 nm are placed before more preferable projection laser image, ccd video camera camera lens
Piece.Pulse laser is in YOZ planes, and its pulse frequency is 50-800Hz.The device operation principle is：Carry out TIG weldering welderings
When connecing, it is radiated at weld pool surface by adjusting pulse laser position, give molten bath certain impact power, molten bath is produced vibration,
In structure laser reflection imaging system, laser irradiates dot matrix laser in weld pool surface, is imaged in after being reflected through weld pool surface
On imaging screen, because molten bath produces concussion, dot matrix laser can change, and recorded using CCD and gather dot matrix on imaging screen
The change procedure of laser, while the data of CCD records are transported in computer in real time, computer passes through the program that writes in advance
Bath vibration characteristic frequency is extracted, and appropriate welding parameter is selected according to Bath vibration frequency, then welding parameter is believed
Number send tig arc welding machine to, by changing the welding parameter of welding machine, realize the real-time control to joint penetration.
Oscillation frequency is obtained with existing use pulse or frequency conversion electric current exciting molten bath, and measurement arc voltage and arc signal
The method of rate is compared, and a kind of penetration control device for pulse laser exciting TIG molten baths detection frequency of oscillation that the present invention is used has
Following characteristics：
1st, exciting is carried out to molten bath relative to electric current, the exciting that can be stablized in molten bath using pulse laser will not
When occurring due to electric arc opposite piece continuous walking, the arc force reduction that electric arc can shift and cause molten bath to be subject to makes to melt
Pond oscillation level reduction, so as to cause Bath vibration instability problem.
2nd, the present apparatus can improve the degree of accuracy of detection Bath vibration frequency, realize accurate efficient penetration control.
Brief description of the drawings
Fig. 1 detects in a kind of pulse laser exciting TIG molten baths the penetration control device schematic diagram of frequency of oscillation
Fig. 2 laser changes Observation principle figure
In figure：1st, workpiece；2nd, molten bath；3rd, imaging screen；4th, computer；5th, ccd video camera；6th, imaging screen fixed mount；7、TIG
Welding gun；8th, laser；9th, pulse laser；10th, TIG power supplys.
Embodiment
The example of the present invention is further illustrated below in conjunction with the accompanying drawings, this example is molten in a kind of pulse laser exciting TIG welderings
Implemented under the penetration control device of pond detection frequency of oscillation, specific method is as follows with step：
1st, using 200 mm × 70 mm × 3mm stainless steel 304 as welding workpiece 1, its surface is handled, removed
Surface and oil contaminant, with grinder buffing to there is metallic luster, workpiece 1 is placed on welding bench, and is fixed.
2nd, in structure laser reflection imaging system, laser 8 is opened, lattice-like laser beam is produced, it is radiated at TIG
Weld on the surface of tungsten electrode underlying workpiece 1, its purpose is in welding process, dot matrix laser beam can be radiated at the surface of molten bath 2,
Dot matrix laser reflection is made on imaging screen 3 by molten bath 2.Laser is placed in XOZ planes, with the horizontal direction of workpiece 1 into 30 °.
Wherein vertical height of the laser close to one end of workpiece to workpiece is 20mm, and the horizontal range to welding gun is 48m.Laser is adopted
Rated voltage is 3V, power 200mW, wavelength 650nm.
3rd, open and adjust pulse laser 9, pulse laser beam is radiated on the surface of TIG weldering tungsten electrodes underlying workpiece 1, its
Purpose is in order to which laser beam can be radiated at weld pool surface in welding process；The pulse frequency of pulse laser 9 is 50-
100HZ。
4th, tig arc welding machine 10 is opened, is welded；Pulsed laser irradiation is on the surface of molten bath 2, the impulsive force certain to molten bath,
Molten bath is set to produce vibration.
5th, the change procedure of dot matrix laser is observed by imaging screen 3, it is changed principle such as Fig. 2 and remembered using ccd video camera 5
The change procedure of dot matrix laser on imaging screen 3 is recorded and gathers, the data of record are transported in computer 4 in real time, and computer 4 passes through
The Program extraction write in advance goes out Bath vibration characteristic frequency, and selects appropriate welding parameter according to Bath vibration frequency,
Then send welding parameter signal to tig arc welding machine 10, change the welding parameter of welding machine, realize the real-time control to joint penetration
System.
Claims (4)
1. the penetration control device of frequency of oscillation, including herein below are detected in a kind of pulse laser exciting TIG molten baths：
The penetration control device that frequency of oscillation is detected in pulse laser exciting TIG molten baths is built, the device is main anti-by structure laser
Imaging system is penetrated to constitute with laser vision acquisition system and pulse laser, in structure laser reflection imaging system, laser
Device is placed in XOZ planes, with workpiece level direction into 30 °, wherein vertical height of the laser close to one end of workpiece to workpiece
For 20mm, the horizontal range to welding gun is 48m, and the rated voltage that laser is used is 3 V, power 200mW, wavelength 650nm, into
Welding gun opposite side is placed on as shielding and parallel to YOZ planes, and its size is 47cm × 29cm, and TIG welding guns are vertical with workpiece planarization,
And at a distance of 5-10mm, laser vision acquisition system is made up of the CCD industrial cameras and computer placed after imaging screen.
2. the penetration control device of frequency of oscillation is detected in a kind of pulse laser exciting TIG molten baths according to claim 1, its
It is characterised by：In structure laser reflection imaging system, laser produces dot matrix laser.
3. the penetration control device of frequency of oscillation is detected in a kind of pulse laser exciting TIG molten baths according to claim 1, its
It is characterised by：The spectral response range of CCD industrial cameras is 340 ~ 1030 nm, and signal to noise ratio is 38 dB, and dynamic range is big
In 70 dB.
4. the penetration control device of frequency of oscillation is detected in a kind of pulse laser exciting TIG molten baths according to claim 1, its
It is characterised by：Laser image is disturbed for reduction arc light, preposition 650 nm of CCD industrial camera camera lenses bandpass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621222464.8U CN206567687U (en) | 2016-11-14 | 2016-11-14 | Detect the penetration control device of frequency of oscillation in a kind of pulse laser exciting TIG molten baths |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621222464.8U CN206567687U (en) | 2016-11-14 | 2016-11-14 | Detect the penetration control device of frequency of oscillation in a kind of pulse laser exciting TIG molten baths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206567687U true CN206567687U (en) | 2017-10-20 |
Family
ID=60063824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621222464.8U Active CN206567687U (en) | 2016-11-14 | 2016-11-14 | Detect the penetration control device of frequency of oscillation in a kind of pulse laser exciting TIG molten baths |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206567687U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152291A (en) * | 2017-11-30 | 2018-06-12 | 清华大学 | End seam welding incomplete fusion shortcoming real-time detection method based on weld pool dynamics feature |
| CN109773339A (en) * | 2019-02-26 | 2019-05-21 | 重庆理工大学 | A kind of arc-welding method based on laser higher-order of oscillation molten bath |
| CN111331229A (en) * | 2019-12-25 | 2020-06-26 | 兰州理工大学 | Continuous pulse tungsten electrode argon arc welding critical penetration control method, device and system |
| CN113029872A (en) * | 2021-03-25 | 2021-06-25 | 兰州理工大学 | Method and system for measuring surface tension of liquid metal of welding pool in real time |
| CN113295581A (en) * | 2021-05-24 | 2021-08-24 | 兰州理工大学 | Method and device for dynamically measuring surface tension of welding molten drop and data processing terminal |
-
2016
- 2016-11-14 CN CN201621222464.8U patent/CN206567687U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152291A (en) * | 2017-11-30 | 2018-06-12 | 清华大学 | End seam welding incomplete fusion shortcoming real-time detection method based on weld pool dynamics feature |
| CN108152291B (en) * | 2017-11-30 | 2020-02-28 | 清华大学 | End seam welding unfused defect real-time detection method based on dynamic characteristics of molten pool |
| CN109773339A (en) * | 2019-02-26 | 2019-05-21 | 重庆理工大学 | A kind of arc-welding method based on laser higher-order of oscillation molten bath |
| CN109773339B (en) * | 2019-02-26 | 2021-04-13 | 重庆理工大学 | Arc welding method based on laser high-frequency oscillation molten pool |
| CN111331229A (en) * | 2019-12-25 | 2020-06-26 | 兰州理工大学 | Continuous pulse tungsten electrode argon arc welding critical penetration control method, device and system |
| CN113029872A (en) * | 2021-03-25 | 2021-06-25 | 兰州理工大学 | Method and system for measuring surface tension of liquid metal of welding pool in real time |
| CN113295581A (en) * | 2021-05-24 | 2021-08-24 | 兰州理工大学 | Method and device for dynamically measuring surface tension of welding molten drop and data processing terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206567687U (en) | Detect the penetration control device of frequency of oscillation in a kind of pulse laser exciting TIG molten baths | |
| KR102013475B1 (en) | System for characterizing manual welding operations | |
| CN108838397B (en) | Laser additive manufacturing online monitoring method | |
| CN204989047U (en) | Welding quality analytical equipment based on infrared vision | |
| Wang | Three-dimensional vision-based sensing of GTAW: a review | |
| CN107931802B (en) | Arc welding seam quality online detection method based on mid-infrared temperature sensing | |
| CN113042862A (en) | Welding deviation detection system and detection method based on active and passive visual combination | |
| Shi et al. | Laser-vision-based measurement and analysis of weld pool oscillation frequency in GTAW-P | |
| CN108489986A (en) | A kind of increasing material manufacturing on-line checking and restorative procedure | |
| CN110193679B (en) | Weld forming control device and method based on front visual sensing of molten pool | |
| CN114260547B (en) | Narrow-gap rotating arc GTAW tungsten electrode position correction method based on deep learning algorithm | |
| Wang et al. | Weld reinforcement analysis based on long-term prediction of molten pool image in additive manufacturing | |
| CN108672893B (en) | Control method for penetration form and penetration depth of asymmetric fillet weld | |
| CN104959719A (en) | Quick nondestructive testing method for hole defect in welding seam of fusion welding | |
| Chen et al. | Dynamic reflection behaviors of weld pool surface in pulsed GTAW | |
| Barot et al. | Process monitoring and internet of things feasibility for submerged arc welding: State of art | |
| Lu et al. | Collaborative and quantitative prediction for reinforcement and penetration depth of weld bead based on molten pool image and deep residual network | |
| ZHANG et al. | Visual sensing of weld pool in variable polarity TIG welding of aluminium alloy | |
| Wang et al. | Weld pool surface fluctuations sensing in pulsed GMAW | |
| Lv et al. | Automatic measuring and processing system of audio sensing for real-time arc height control of pulsed GTAW | |
| CN203992877U (en) | The little characteristic point vision of sheet metal weld seam is followed the tracks of and real-time quality detection device | |
| Lu et al. | Detection of reinforcement of multi-bead and multi-layer weld in additive manufacturing based on on-line visual information of weld pool | |
| CN117428291A (en) | Weld bead fusion width quantification method based on sonogram characteristic analysis | |
| Norman et al. | State-of-the-art of monitoring and imaging of laser welding defects | |
| CN116393867A (en) | Welding quality control method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200810 Address after: 730299 No.719 Xinxing Road, sanchuankou Industrial Park, Gaolan County, Lanzhou City, Gansu Province Patentee after: LANZHOU CHANGZHENG MACHINERY Co.,Ltd. Address before: 730050 Qilihe, Gansu Province Lan Ping Ping Road, No. 287, No. Co-patentee before: He Jing Patentee before: LANZHOU University OF TECHNOLOGY |