CN110899973A - Method and device for improving weld joint quality - Google Patents
Method and device for improving weld joint quality Download PDFInfo
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- CN110899973A CN110899973A CN201911215242.1A CN201911215242A CN110899973A CN 110899973 A CN110899973 A CN 110899973A CN 201911215242 A CN201911215242 A CN 201911215242A CN 110899973 A CN110899973 A CN 110899973A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
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Abstract
The invention provides a method and a device for improving the quality of a welding seam, wherein the method comprises the following steps: after welding the welding seam of the strip steel, acquiring a welding wire appearance image of the surface of the welding seam; carrying out image analysis on the welding wire morphology image to obtain an image analysis result; searching a corresponding fault type in a preset mapping table according to the image analysis result, wherein the mapping table stores the corresponding relation between the image analysis result and the fault type in advance; sending corresponding adjustment information according to the fault type so that a user can correspondingly adjust a welding wire feeding mechanism based on the adjustment information; therefore, when the welding wires are not melted well, the fault type of the welding wire feeding mechanism is determined by utilizing the welding wire appearance image, the adjustment information corresponding to the fault type is sent to a user, the user can adjust the welding wire feeding mechanism based on the adjustment information, the melting effect of the welding wires is ensured, the welding seam quality is improved, and the quality of strip steel products is further improved.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a method and a device for improving the quality of a welding seam.
Background
With the rapid development of the automobile industry, the cold rolling industry is continuously expanded. Laser welding is a key process link in a cold rolling process, and has the characteristics of high welding speed and high welding strength.
However, in the welding process, the welding wire is not melted to become a common bad defect of the welding seam of the laser welding machine. And the strength of the welding line is reduced when the welding line is serious, so that the strip breakage probability in the production process is increased, the number of waste products after rolling is increased, and the product quality is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for improving the quality of a welding seam, which are used for solving the technical problem that the quality of the welding seam is poor due to poor melting of a welding wire in the process of welding strip steel by using a laser welding machine in the prior art, so that the quality of a strip steel product is influenced.
The invention provides a method for improving weld quality, comprising the following steps:
after welding the welding seam of the strip steel, acquiring a welding wire appearance image of the surface of the welding seam;
carrying out image analysis on the welding wire morphology image to obtain an image analysis result;
searching a corresponding fault type in a preset mapping table according to the image analysis result, wherein the mapping table stores the corresponding relation between the image analysis result and the fault type in advance;
and sending corresponding adjustment information according to the fault type, so that a user can correspondingly adjust the wire feeding mechanism based on the adjustment information.
Optionally, the searching for the corresponding fault type in the preset mapping table according to the image analysis result includes:
and if the image analysis result shows that the welding spot is disconnected, the fault type searched in the mapping table is unreasonable height setting between the welding wire and the welding spot.
Optionally, the searching for the corresponding fault type in the preset mapping table according to the image analysis result includes:
if the image analysis result shows that the welding wire is in a non-melting state, the fault type searched in the mapping table is that the installation of a tension wheel of the welding wire feeding mechanism is not reasonable or the installation position between a welding wire guide nozzle and a laser beam focus is not reasonable.
Optionally, sending corresponding adjustment information according to the fault type includes:
if the fault type is that the height between the welding wire and the welding seam is unreasonable, the adjustment information is as follows: adjusting the height of the Z axis of the welding wire feeding mechanism according to the thickness of the strip steel;
and adjusting the distance between the welding wire guide nozzle and the strip steel to be 0.6-0.8 mm by using a micrometer of the welding wire feeding mechanism.
Optionally, sending corresponding adjustment information according to the fault type includes:
if the fault type is that the installation of the tension wheel of the welding wire feeding mechanism is unreasonable, the adjustment information is as follows: and adjusting the tension wheel according to the curvature of the welding wire until the curvature reaches 0-3 mm/m.
Optionally, sending corresponding adjustment information according to the fault type includes:
if the fault type is that the installation position between the welding wire guide nozzle and the laser beam focus is unreasonable, the adjustment information is as follows: determining a deviation direction and a deviation distance of the welding wire relative to the focal point of the laser beam;
and adjusting a fastening bolt for fixing the horizontal position of the welding wire based on the deviation direction and the deviation distance.
Optionally, after the corresponding fault type is searched in a preset mapping table according to the image analysis result, the method includes:
and sending prompt information for carrying out dotting operation on the welding wire by using laser according to a preset time interval, dotting times and laser power so that the user can verify the fault type according to the dotting result.
Optionally, before welding the weld of the strip steel, the method further comprises:
feeding wires for 10-15 s according to a preset wire feeding speed, and acquiring the actual wire feeding length;
and comparing whether the actual wire feeding length is consistent with the reference wire feeding length, and if the actual wire feeding length is inconsistent with the reference wire feeding length, sending a prompt message that the welding wire driving unit fails.
The present invention also provides an apparatus for improving weld quality, the apparatus comprising:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a welding wire appearance image on the surface of a welding seam after the welding seam of the strip steel is welded;
the analysis unit is used for carrying out image analysis on the welding wire morphology image to obtain an image analysis result;
the searching unit is used for searching a corresponding fault type in a preset mapping table according to the image analysis result, and the mapping table stores the corresponding relation between the image analysis result and the fault type in advance;
and the sending unit is used for sending corresponding adjustment information according to the fault type so that a user can correspondingly adjust the welding wire feeding mechanism based on the adjustment information.
Optionally, the search unit is specifically configured to:
if the image analysis result shows that the welding spot is disconnected, the fault type searched in the mapping table is unreasonable in height setting between the welding wire and the welding seam;
if the image analysis result shows that the welding wire is in a non-melting state, the fault type searched in the mapping table is that the installation of a tension wheel of the welding wire feeding mechanism is not reasonable or the installation position between a welding wire guide nozzle and a laser beam focus is not reasonable.
The invention provides a method and a device for improving the quality of a welding seam, wherein the method comprises the following steps: after welding the welding seam of the strip steel, acquiring a welding wire appearance image of the surface of the welding seam; carrying out image analysis on the welding wire morphology image to obtain an image analysis result; searching a corresponding fault type in a preset mapping table according to the image analysis result, wherein the mapping table stores the corresponding relation between the image analysis result and the fault type in advance; sending corresponding adjustment information according to the fault type so that a user can correspondingly adjust a welding wire feeding mechanism based on the adjustment information; therefore, when the welding wires are not melted well, the fault type of the welding wire feeding mechanism is determined by utilizing the welding wire appearance image, the adjustment information corresponding to the fault type is sent to a user, the user can adjust the welding wire feeding mechanism based on the adjustment information, the melting effect of the welding wires is ensured, the welding seam quality is improved, and the quality of strip steel products is further improved.
Drawings
FIG. 1 is a schematic flow chart of a method for improving weld quality according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a wire feeding mechanism provided in the prior art;
FIG. 3 is a schematic diagram illustrating a broken solder joint according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a welding wire segment provided in accordance with an embodiment of the present invention when it is unmelted;
FIG. 5 is a schematic diagram illustrating the result of the apparatus for improving the quality of the weld according to the embodiment of the present invention.
Detailed Description
The welding wire aims to solve the technical problem that in the process of welding strip steel by using a laser welding machine in the prior art, the quality of a welding seam is poor due to poor melting of a welding wire, and the quality of a strip steel product is further influenced. The invention provides a method and a device for improving the quality of a welding seam, wherein the method comprises the following steps: after welding the welding seam of the strip steel, acquiring a welding wire appearance image of the surface of the welding seam; carrying out image analysis on the welding wire morphology image to obtain an image analysis result; searching a corresponding fault type in a preset mapping table according to the image analysis result, wherein the mapping table stores the corresponding relation between the image analysis result and the fault type in advance; and sending corresponding adjustment information according to the fault type, so that a user can correspondingly adjust the wire feeding mechanism based on the adjustment information.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The present embodiment provides a method for improving the quality of a weld, as shown in fig. 1, the method comprising:
s110, welding the welding seam of the strip steel, and acquiring a welding wire appearance image of the surface of the welding seam;
in the welding process, when the position of the welding wire and the position of the laser beam are relatively deviated, the welding wire can be prevented from melting, and the welding wire has melting defects. In order to better understand the technical solution, the structure of the wire feeding mechanism of the laser welding machine is described first, as shown in fig. 2, the wire feeding mechanism includes: tension pulley 21, welding wire drive unit 22, wire feeding guide nozzle assembly 23, and the working state of each component of the wire feeding mechanism is a key factor for ensuring the melting quality of the welding wire.
When different parts fail after welding, the weld wire topography images of the weld surface are also different. The fault type can be determined from the wire topographical image. Then, after the strip steel is welded, an image acquisition device can be used for acquiring a welding wire appearance image of the surface of a welding seam; the image acquisition device may comprise a camera.
Here, before welding the weld of the strip steel, the method further includes:
feeding wires for 10-15 s according to a preset wire feeding speed, and acquiring an actual wire feeding length, wherein the wire feeding time is 10s and the wire feeding speed is 10 m/min;
and comparing whether the actual wire feeding length is consistent with the reference wire feeding length, if the actual wire feeding length is inconsistent with the reference wire feeding length, indicating that the wire laying of the welding wire feeding mechanism is not smooth or the welding wire slips, and sending a prompt message that the welding wire driving unit fails.
Here, the slipping of the welding wire is mainly caused by the fact that the tension wheel is not rotating, that is, the welding wire is being laid out normally, and the rotation of the tension wheel is stopped. This allows a determination to be made before welding if the wire drive unit is malfunctioning.
If the prompt message that the welding wire driving unit fails is received, a user can open the motor pressing wheel of the welding wire driving unit, check whether the internal motor wheel rotates well or not, check whether the motor pressing wheel has a wear condition or not, and replace the driving unit if the problem exists.
S111, carrying out image analysis on the welding wire morphology image to obtain an image analysis result; searching a corresponding fault type in a preset mapping table according to the image analysis result;
and after the welding wire appearance image is obtained, carrying out image analysis on the welding wire appearance image to obtain an image analysis result. And searching a corresponding fault type in a preset mapping table according to the image analysis result, wherein the mapping table stores the corresponding relation between the image analysis result and the fault type in advance.
As an optional embodiment, finding a corresponding fault type in a preset mapping table according to the image analysis result includes:
and if the image analysis result shows that the welding spot is disconnected, the fault type searched in the mapping table is unreasonable height setting between the welding wire and the welding spot.
Here, if the height between the welding wire and the welding seam is not reasonably set, laser is caused to strike on the welding wire in advance to melt the welding wire, the welding wire drops on the strip steel after being melted, the welding spot is broken, and an image of the broken welding spot can refer to fig. 3.
As an optional embodiment, finding a corresponding fault type in a preset mapping table according to the image analysis result includes:
if the image analysis result shows that the welding wire is not melted in a segment shape (which can be understood as the phenomenon that one segment is melted and the other segment is not melted), the fault type searched in the mapping table is that the tension wheel of the welding wire feeding mechanism is not installed reasonably or the installation position between the welding wire guide nozzle and the laser beam focus is not reasonable.
Here, if the tension pulley is not installed properly, the wire feeding mechanism oscillates during laying, and the focal point of the laser beam is very small (the focal diameter of the laser is not more than 0.2mm), so that the laser intersection may or may not hit the welding wire during welding, which results in non-melting of the welding wire segment, as shown in fig. 4.
Similarly, if the welding wire guide nozzle is too close to the laser beam focus, the welding wire guide nozzle is melted by the laser heat during welding, and finally the problem of non-melting of the welding wire in a segment shape also occurs.
Here, after searching for a corresponding fault type in a preset mapping table according to the image analysis result, the method includes:
if the fault type is that the installation of a tension pulley of the welding wire feeding mechanism is unreasonable or the installation position between a welding wire guide nozzle and a laser beam focus is unreasonable, prompt information for dotting the welding wire by using laser according to a preset time interval, dotting times and laser power is sent, so that the user can verify the fault type according to the dotting result.
Specifically, the user can test the welding wire by dotting according to the prompt message. Setting the laying length to be 10mm, presetting the shutter opening time of laser to be 60ms, and setting the laser power to be 600W, dotting the welding wire when the welding wire is 10mm in the laying process, and continuously dotting for 3-5 times, wherein if no light spot exists on the welding wire, the welding wire is large in position offset, and the distance between the welding wire and the laser beam focus is offset; if two or three light spots are left on the welding wire, the fact that the laying wire is not straight is indicated, and the tension wheel or the welding wire guide nozzle has faults. If 5 light spots are left on the welding wire, the welding wire is correctly positioned.
In practical application, if a user determines that the tensioning wheel has no problem, the welding wire guide nozzle can be detached, and the abrasion condition of the wire outlet of the welding wire guide nozzle is checked. If the abrasion of the laying hole is too large, a new welding wire guide nozzle is replaced. It should be noted that when the welding wire guide nozzle is installed, the inclined surface of the guide nozzle needs to be downward, otherwise, the welding wire guide nozzle is worn in the welding process.
And S112, sending corresponding adjustment information according to the fault type, so that a user can correspondingly adjust the welding wire feeding mechanism based on the adjustment information.
And after the fault type is determined, sending corresponding adjustment information according to the fault type, so that a user can correspondingly adjust the welding wire feeding mechanism based on the adjustment information.
As an alternative embodiment, if the fault type is that the height between the welding wire and the welding seam is set unreasonably, the corresponding adjustment information is: and adjusting the height of the Z axis of the welding wire feeding mechanism according to the thickness of the strip steel, and adjusting the distance between a welding wire guide nozzle and the strip steel to be 0.6-0.8 mm by using a micrometer of the welding wire feeding mechanism.
In practical application, the user can adjust the distance between the welding wire guide nozzle and the strip steel by adjusting the bolt for fixing the height of the welding wire by using a micrometer. And after the adjustment is finished, the bolt is locked.
As an optional embodiment, sending corresponding adjustment information according to the fault type includes:
if the fault type is that the installation position between the welding wire guide nozzle and the laser beam focus is unreasonable, the adjustment information is as follows: determining a deviation direction and a deviation distance of the welding wire relative to the focal point of the laser beam;
and adjusting a fastening bolt for fixing the horizontal position of the welding wire based on the deviation direction and the deviation distance.
When the deviation direction and the deviation distance of the welding wire relative to the laser beam focus are determined, irradiating red light detected by a welding machine on the welding wire, and if the center of a red light spot is at the center of the welding wire, indicating that the welding wire does not deviate at the moment; if the center of the red light facula is towards one side of the welding wire, the deviation direction is towards one side; if the center of the red light spot is towards the other side of the welding wire, the deviation direction is to deviate towards the other side. The offset distance is the distance between the center of the spot and the center of the wire.
As an optional embodiment, sending corresponding adjustment information according to the fault type includes:
if the fault type is that the installation of the tension wheel of the welding wire feeding mechanism is unreasonable, the adjustment information is as follows: and adjusting the tension wheel according to the curvature of the welding wire, and adjusting the compaction degree of the tension wheel until the curvature of the welding wire reaches 0-3 mm/m and the welding wire does not bend within 50mm of wire laying.
After the user finishes adjusting, still can hand move and tell the welding wire and observe whether the tensioning wheelset all rotates well. If a poor rotation is found, the wheel sets can be cleaned with a cleaning agent until all wheel sets have rotated well.
Similarly, if the driving unit fails, after the driving unit is replaced, no wire-feeding slipping or unsmooth wire laying is found within 10s of wire-feeding time at the wire-feeding speed of 10m/min, which indicates that the wire feeding meets the requirements.
Therefore, the welding wire feeding mechanism can be correspondingly adjusted according to the fault type, and the seam quality is improved, so that the product quality is improved.
Based on the same inventive concept, the invention also provides a device for improving the quality of the welding seam, which is detailed in the second embodiment.
Example two
The present embodiment provides an apparatus for improving the quality of a weld, and referring to fig. 5, the apparatus includes: an acquisition unit 51, an analysis unit 52, a search unit 53, and a transmission unit 54; wherein the content of the first and second substances,
in the welding process, when the position of the welding wire and the position of the laser beam are relatively deviated, the welding wire is not melted and has melting defects. In order to better understand the technical solution, the structure of the wire feeding mechanism of the laser welding machine is first introduced, as shown in fig. 2, the wire feeding mechanism includes: tension pulley 21, welding wire drive unit 22, wire feeding guide nozzle assembly 23, and the working state of each component of the wire feeding mechanism is a key factor for ensuring the melting quality of the welding wire.
When different parts fail after welding, the weld wire topography images of the weld surface are also different. The fault type can be determined from the wire topographical image. The acquiring unit 51 is used for acquiring a welding wire morphology image of the weld surface after the strip steel is welded; the acquisition unit 51 may comprise a camera.
Here, before welding the weld of the strip steel, the search unit 54 is configured to:
feeding wires for 10-15 s according to a preset wire feeding speed, and acquiring an actual wire feeding length, wherein the wire feeding time is 10s and the wire feeding speed is 10 m/min;
and comparing whether the actual wire feeding length is consistent with the reference wire feeding length, if the actual wire feeding length is inconsistent with the reference wire feeding length, indicating that the wire laying of the wire feeding mechanism is not smooth or the welding wire slips, and sending a prompt message that the welding wire driving unit fails by the sending unit 54.
Here, the slipping of the welding wire is mainly caused by the fact that the tension wheel is not rotating, that is, the welding wire is being laid out normally, and the rotation of the tension wheel is stopped. This allows a determination to be made before welding if the wire drive unit is malfunctioning.
If the prompt message that the welding wire driving unit fails is received, a user can open the motor pressing wheel of the welding wire driving unit, check whether the internal motor wheel rotates well or not, check whether the motor pressing wheel has a wear condition or not, and replace the driving unit if the problem exists.
After the welding wire morphology image is obtained, the analysis unit 52 is configured to perform image analysis on the welding wire morphology image to obtain an image analysis result. Specific image analysis methods may include edge extraction algorithms, region segmentation algorithms, and the like.
The searching unit 53 is configured to search a corresponding fault type in a preset mapping table according to the image analysis result, where a corresponding relationship between the image analysis result and the fault type is stored in the mapping table in advance.
As an alternative embodiment, the search unit 53 is specifically configured to:
and if the image analysis result shows that the welding spot is disconnected, the fault type searched in the mapping table is unreasonable height setting between the welding wire and the welding spot.
Here, if the height between the welding wire and the welding seam is not reasonably set, laser is caused to strike on the welding wire in advance to melt the welding wire, the welding wire drops on the strip steel after being melted, the welding spot is broken, and an image of the broken welding spot can refer to fig. 3.
As an alternative embodiment, the search unit 53 is specifically configured to:
if the image analysis result shows that the welding wire is not melted in a segment shape (which can be understood as the phenomenon that one segment is melted and the other segment is not melted), the fault type searched in the mapping table is that the tension wheel of the welding wire feeding mechanism is not installed reasonably or the installation position between the welding wire guide nozzle and the laser beam focus is not reasonable.
Here, if the tension pulley is not installed properly, the wire feeding mechanism oscillates during laying, and the focal point of the laser beam is very small (the focal diameter of the laser is not more than 0.2mm), so that the laser intersection may or may not hit the welding wire during welding, which results in non-melting of the welding wire segment, as shown in fig. 4.
Similarly, if the welding wire guide nozzle is too close to the laser beam focus, the welding wire guide nozzle is melted by the laser heat during welding, and finally the problem of non-melting of the welding wire in a segment shape also occurs.
Here, if the corresponding fault type is found in the preset mapping table according to the image analysis result, the sending unit 54 is configured to:
if the fault type is that the installation of a tension pulley of the welding wire feeding mechanism is unreasonable or the installation position between a welding wire guide nozzle and a laser beam focus is unreasonable, prompt information for dotting the welding wire by using laser according to a preset time interval, dotting times and laser power is sent, so that the user can verify the fault type according to the dotting result.
Specifically, the user can test the welding wire by dotting according to the prompt message. Setting the laying length to be 10mm, presetting the shutter opening time of laser to be 60ms, and setting the laser power to be 600W, dotting the welding wire when the welding wire is 10mm in the laying process, and continuously dotting for 3-5 times, wherein if no light spot exists on the welding wire, the welding wire is large in position offset, and the distance between the welding wire and the laser beam focus is offset; if two or three light spots are left on the welding wire, the fact that the laying wire is not straight is indicated, and the tension wheel or the welding wire guide nozzle has faults. If 5 light spots are left on the welding wire, the welding wire is correctly positioned.
In practical application, if a user determines that the tensioning wheel has no problem, the welding wire guide nozzle can be detached, and the abrasion condition of the wire outlet of the welding wire guide nozzle is checked. If the abrasion of the laying hole is too large, a new welding wire guide nozzle is replaced. It should be noted that when the welding wire guide nozzle is installed, the inclined surface of the guide nozzle needs to be downward, otherwise, the welding wire guide nozzle is worn in the welding process.
After determining the fault type, the sending unit 54 is configured to send corresponding adjustment information according to the fault type, so that a user can perform corresponding adjustment on the wire feeding mechanism based on the adjustment information.
As an alternative embodiment, if the fault type is that the height between the welding wire and the welding seam is set unreasonably, the corresponding adjustment information is: and adjusting the height of the Z axis of the welding wire feeding mechanism according to the thickness of the strip steel, and adjusting the distance between a welding wire guide nozzle and the strip steel to be 0.6-0.8 mm by using a micrometer of the welding wire feeding mechanism.
In practical application, the user can adjust the distance between the welding wire guide nozzle and the strip steel by adjusting the bolt for fixing the height of the welding wire by using a micrometer. And after the adjustment is finished, the bolt is locked.
As an optional embodiment, sending corresponding adjustment information according to the fault type includes:
if the fault type is that the installation position between the welding wire guide nozzle and the laser beam focus is unreasonable, the adjustment information is as follows: determining a deviation direction and a deviation distance of the welding wire relative to the focal point of the laser beam;
and adjusting a fastening bolt for fixing the horizontal position of the welding wire based on the deviation direction and the deviation distance.
When the deviation direction and the deviation distance of the welding wire relative to the laser beam focus are determined, irradiating red light detected by a welding machine on the welding wire, and if the center of a red light spot is at the center of the welding wire, indicating that the welding wire does not deviate at the moment; if the center of the red light facula is towards one side of the welding wire, the deviation direction is towards one side; if the center of the red light spot is towards the other side of the welding wire, the deviation direction is to deviate towards the other side. The offset distance is the distance between the center of the spot and the center of the wire.
As an optional embodiment, sending corresponding adjustment information according to the fault type includes:
if the fault type is that the installation of the tension wheel of the welding wire feeding mechanism is unreasonable, the adjustment information is as follows: and adjusting the tension wheel according to the curvature of the welding wire, and adjusting the compaction degree of the tension wheel until the curvature of the welding wire reaches 0-3 mm/m and the welding wire does not bend within 50mm of wire laying.
After the user finishes adjusting, still can hand move and tell the welding wire and observe whether the tensioning wheelset all rotates well. If a poor rotation is found, the wheel sets can be cleaned with a cleaning agent until all wheel sets have rotated well.
Similarly, if the driving unit fails, after the driving unit is replaced, no wire-feeding slipping or unsmooth wire laying is found within 10s of wire-feeding time at the wire-feeding speed of 10m/min, which indicates that the wire feeding meets the requirements.
Therefore, the welding wire feeding mechanism can be correspondingly adjusted according to the fault type, and the seam quality is improved, so that the product quality is improved.
The method and the device for improving the quality of the welding seam provided by the invention have the following beneficial effects that:
the invention provides a method and a device for improving the quality of a welding seam, wherein the method comprises the following steps: after welding the welding seam of the strip steel, acquiring a welding wire appearance image of the surface of the welding seam; carrying out image analysis on the welding wire morphology image to obtain an image analysis result; searching a corresponding fault type in a preset mapping table according to the image analysis result, wherein the mapping table stores the corresponding relation between the image analysis result and the fault type in advance; sending corresponding adjustment information according to the fault type so that a user can correspondingly adjust a welding wire feeding mechanism based on the adjustment information; therefore, when the welding wires are not melted well, the fault type of the welding wire feeding mechanism is determined by utilizing the welding wire appearance image, the adjustment information corresponding to the fault type is sent to a user, the user can adjust the welding wire feeding mechanism based on the adjustment information, the melting effect of the welding wires is ensured, the welding seam quality is improved, and the quality of strip steel products is further improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A method for improving the quality of a weld, the method comprising:
after welding the welding seam of the strip steel, acquiring a welding wire appearance image of the surface of the welding seam;
carrying out image analysis on the welding wire morphology image to obtain an image analysis result;
searching a corresponding fault type in a preset mapping table according to the image analysis result, wherein the mapping table stores the corresponding relation between the image analysis result and the fault type in advance;
and sending corresponding adjustment information according to the fault type, so that a user can correspondingly adjust the wire feeding mechanism based on the adjustment information.
2. The method of claim 1, wherein the searching for the corresponding fault type in a preset mapping table according to the image analysis result comprises:
and if the image analysis result shows that the welding spot is disconnected, the fault type searched in the mapping table is unreasonable height setting between the welding wire and the welding spot.
3. The method of claim 1, wherein the searching for the corresponding fault type in a preset mapping table according to the image analysis result comprises:
if the image analysis result shows that the welding wire is in a non-melting state, the fault type searched in the mapping table is that the installation of a tension wheel of the welding wire feeding mechanism is not reasonable or the installation position between a welding wire guide nozzle and a laser beam focus is not reasonable.
4. The method of claim 1, wherein sending corresponding adjustment information based on the fault type comprises:
if the fault type is that the height between the welding wire and the welding seam is unreasonable, the adjustment information is as follows: adjusting the height of the Z axis of the welding wire feeding mechanism according to the thickness of the strip steel;
and adjusting the distance between the welding wire guide nozzle and the strip steel to be 0.6-0.8 mm by using a micrometer of the welding wire feeding mechanism.
5. The method of claim 1, wherein sending corresponding adjustment information based on the fault type comprises:
if the fault type is that the installation of the tension wheel of the welding wire feeding mechanism is unreasonable, the adjustment information is as follows: and adjusting the tension wheel according to the curvature of the welding wire until the curvature reaches 0-3 mm/m.
6. The method of claim 1, wherein sending corresponding adjustment information based on the fault type comprises:
if the fault type is that the installation position between the welding wire guide nozzle and the laser beam focus is unreasonable, the adjustment information is as follows: determining a deviation direction and a deviation distance of the welding wire relative to the focal point of the laser beam;
and adjusting a fastening bolt for fixing the horizontal position of the welding wire based on the deviation direction and the deviation distance.
7. The method as claimed in claim 1, wherein after searching a corresponding fault type in a preset mapping table according to the image analysis result, the method comprises:
and sending prompt information for carrying out dotting operation on the welding wire by using laser according to a preset time interval, dotting times and laser power so that the user can verify the fault type according to the dotting result.
8. The method of claim 1, wherein prior to welding the weld of the strip, the method further comprises:
feeding wires for 10-15 s according to a preset wire feeding speed, and acquiring the actual wire feeding length;
and comparing whether the actual wire feeding length is consistent with the reference wire feeding length, and if the actual wire feeding length is inconsistent with the reference wire feeding length, sending a prompt message that the welding wire driving unit fails.
9. An apparatus for improving the quality of a weld, the apparatus comprising:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a welding wire appearance image on the surface of a welding seam after the welding seam of the strip steel is welded;
the analysis unit is used for carrying out image analysis on the welding wire morphology image to obtain an image analysis result;
the searching unit is used for searching a corresponding fault type in a preset mapping table according to the image analysis result, and the mapping table stores the corresponding relation between the image analysis result and the fault type in advance;
and the sending unit is used for sending corresponding adjustment information according to the fault type so that a user can correspondingly adjust the welding wire feeding mechanism based on the adjustment information.
10. The apparatus of claim 9, wherein the lookup unit is specifically configured to:
if the image analysis result shows that the welding spot is disconnected, the fault type searched in the mapping table is unreasonable in height setting between the welding wire and the welding seam;
if the image analysis result shows that the welding wire is in a non-melting state, the fault type searched in the mapping table is that the installation of a tension wheel of the welding wire feeding mechanism is not reasonable or the installation position between a welding wire guide nozzle and a laser beam focus is not reasonable.
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