CN113458605A - Device and method based on laser-MIG composite additive repair - Google Patents
Device and method based on laser-MIG composite additive repair Download PDFInfo
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- CN113458605A CN113458605A CN202110783108.2A CN202110783108A CN113458605A CN 113458605 A CN113458605 A CN 113458605A CN 202110783108 A CN202110783108 A CN 202110783108A CN 113458605 A CN113458605 A CN 113458605A
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- 230000008439 repair process Effects 0.000 title claims abstract description 130
- 239000000654 additive Substances 0.000 title claims abstract description 39
- 230000000996 additive effect Effects 0.000 title claims abstract description 39
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 41
- 238000004372 laser cladding Methods 0.000 claims abstract description 38
- 238000010891 electric arc Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 230000001771 impaired effect Effects 0.000 claims 2
- 239000011261 inert gas Substances 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract 2
- 238000002844 melting Methods 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WEOVSIBZCGHNQQ-OARHJJEASA-N (2s,3s,4s,5r,6r)-3,4,5-trihydroxy-6-[1-[[2-(1-hydroxyethyl)-1-benzofuran-7-yl]oxy]-3-(propan-2-ylamino)propan-2-yl]oxyoxane-2-carboxylic acid Chemical compound C=1C=CC=2C=C(C(C)O)OC=2C=1OCC(CNC(C)C)O[C@@H]1O[C@H](C(O)=O)[C@@H](O)[C@H](O)[C@H]1O WEOVSIBZCGHNQQ-OARHJJEASA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a device and a method for repairing a composite additive based on laser-MIG (metal-inert gas welding). The computer control system sends an instruction to the composite material additive repair of the damaged structural part, controls the scanning path of the laser cladding head and the MIG welding gun and judges whether the repair process is finished or not; the laser-MIG composite material increase repairing system realizes repairing of the damaged structural part by flexibly selecting a laser heat source and an electric arc heat source based on the specific repairing requirement of the damaged structural part. The invention organically couples the electric arc additive repair and the laser melting deposition repair, effectively combines the advantages of the electric arc additive repair and the laser melting deposition repair, improves the stability of the additive repair process, and ensures the forming efficiency and the forming quality in the additive repair process.
Description
Technical Field
The invention belongs to the field of repair, and particularly relates to a device and a method for composite material additive repair based on laser-MIG (Metal insert-Gas welding).
Background
Additive Manufacturing Repair Technology (AMRT) is a new Manufacturing Technology that uses laser beams, electron beams, or electric arcs as heat sources to Repair damaged structural members by adding materials layer by layer. The traditional repairing technology has the defects of low repairing precision, difficult satisfying of repairing quality and the like. Compared with the traditional single arc repair process, the laser heat source has the advantages of more concentrated energy, narrow heat affected zone and the like. And the repair process adopts direct current reverse connection, so that the cathode cleaning function of the electric arc can be utilized to clean the oxide film on the surface of the material. The AMRT technology has the advantages of good repair quality, high efficiency, low repair cost, short period and the like, can effectively prolong the service life of parts, and has good application prospect in the fields of aerospace, chemical ships and the like.
Disclosure of Invention
Aiming at the problems existing in the existing material processing, the invention provides a device and a method for laser-MIG (metal inert gas) composite material increase repair, which organically couple electric arc material increase repair and LMD (metal matrix deposition) repair, realize material increase repair of a damaged structural part and effectively improve the quality of the repaired part.
The invention is realized by the following technical scheme:
a device based on laser-MIG composite additive repair comprises a computer control system (5) and a laser-MIG composite additive repair system;
the computer control system (5) is connected with a laser-MIG composite additive repair system; the laser-MIG composite additive repair system comprises: the device comprises a MIG welding gun (2), a laser cladding head (3) and a conversion head (4); the computer control system (5) is used for controlling a scanning path of a laser cladding head and an MIG welding gun, controlling a laser-MIG composite material increase repair system to select a proper repair strategy and judging whether the repair process is finished; the repair strategy is as follows: firstly, repairing a first layer of a repaired target by using the laser cladding head (3) in a powder feeding mode, and then adopting a repairing strategy that the repair of a position with a larger damaged size is carried out by using the MIG welding gun (2) in a wire feeding mode, the repair of a position with a smaller damaged size is carried out by using the laser cladding head (3) in a powder feeding mode, a welding wire is output by the MIG welding gun (2), and powder for repair is coaxially sent out by the laser cladding head (3); repairing the edge area in a powder feeding mode; judging whether the repairing process is finished: and (3) carrying out three-dimensional scanning on the damaged structural part after repair, comparing the obtained three-dimensional model with the three-dimensional model of the undamaged structural part, continuing to carry out the step one if the repair recovery goodness of fit is less than 95%, otherwise, stopping wire feeding and powder feeding, and turning off a laser and an MIG welding machine.
The device, MIG welder (2) with laser cladding head (3) all with conversion head (4) are connected, and can repair the demand according to the reality and rotate conversion head (4), thereby realize MIG welder (2) with the chooseing for use of laser cladding head (3).
The device, the repair strategy is: firstly, performing first-layer repair on a repair target by using a laser cladding head in a powder feeding mode; secondly, performing material increase repair on the position of the structural part with larger damaged size layer by using an MIG welding gun, repairing the position in the edge area by adopting a powder feeding mode, stopping feeding the wire when the height of the remaining unrepaired part is less than or equal to 1.2mm, finishing the MIG material increase repair, and operating a robot by using a computer control system to perform LMD repair by using a laser cladding head so as to improve the repair precision.
The device obtains accurate three-dimensional point cloud through scanning the damaged structural part (1), obtains a three-dimensional model of a repair target through computer curved surface reconstruction, splicing and trimming, and designs a proper material adding mode for repair according to the specific shape and size of the damage.
A method based on laser-MIG composite additive repair specifically comprises the following steps:
the method comprises the following steps: scanning a damaged structural part (1) to obtain three-dimensional point cloud, and reconstructing, splicing and trimming a computer curved surface to obtain a three-dimensional model of a repair target;
step two: dispersing the three-dimensional model into layered slices with certain thickness and sequence and obtaining a specific scanning repair path;
step three: laser-MIG composite additive repair;
above the workbench, the laser cladding head (3) and the MIG welding gun (2) are connected with the conversion head (4) and move along a specified path direction to carry out laser-MIG composite additive repair, and the adopted repair strategy is as follows: firstly, performing first-layer repair on a repair target by using the laser cladding head (3) in a powder feeding mode, then performing repair on a position with a larger damaged size by using the MIG welding gun (2) in a powder feeding mode, performing repair on a position with a smaller damaged size by using the laser cladding head (3) in a powder feeding mode, outputting a welding wire by using the MIG welding gun (2), and coaxially feeding repair powder out by using the laser cladding head (3); repairing the edge area in a powder feeding mode;
step four: the computer control system (5) judges whether the laser-MIG composite material increase repair process is finished or not; if not, continuing to perform the third step; and if the repair is finished, three-dimensional scanning is carried out on the damaged structural part (1) which is repaired again, the obtained three-dimensional model is compared with the three-dimensional model of the undamaged structural part, if the repair recovery goodness of fit is less than 95%, the first step is continued, otherwise, wire feeding and powder feeding are stopped, and a laser and an MIG welding machine are turned off.
According to the method, the laser cladding head (3) is perpendicular to the damaged structural part (1), and the MIG welding gun (2) is perpendicular to the damaged structural part (1).
According to the method, a laser beam is generated by a solid laser or a fiber laser, an electric arc is generated by an MIG welding power source and is in direct current reverse connection, the electric arc and the laser beam are not generated simultaneously, and only one heat source is used for repairing every time.
Compared with the prior art, the invention at least has the following advantages and effects:
the method organically couples the electric arc additive repair and the LMD repair, can effectively combine the advantages of the electric arc additive repair and the LMD repair, avoids the defects of single heat source repair, improves the repair quality and the repair efficiency, reduces the repair assembly requirement, and realizes the high-quality repair of the damaged structural member. The metallurgical performance and the microstructure of the repair part are improved by utilizing the advantages of MIG filler wire, the cathode cleaning effect can be effectively utilized by the direct current reverse connection, the oxide film on the surface of the damaged structural part is cleaned, and the stability of the welding process is promoted.
Drawings
Fig. 1 is a schematic diagram of a laser-MIG based composite additive repair device according to the invention.
1-damaged structural member; 2-MIG welding gun; 3-laser cladding head; 4-a conversion head; 5-computer control system.
Detailed Description
The present invention will be described in detail with reference to specific examples.
As shown in fig. 1. The invention discloses a device and a method for repairing a composite additive based on laser-MIG (metal-inert gas welding), which comprises a computer control system and a laser-MIG composite additive repairing system;
the computer control system is connected with the laser-MIG composite material additive repair system;
the laser-MIG composite additive repair system comprises: MIG welding gun 2, laser cladding head 3, conversion head 4.
The laser cladding head 3 and the MIG welding gun 2 are used for carrying out composite additive repair on the damaged structural part 1 according to a planned path so as to obtain a composite additive repair structural part;
a method based on laser-MIG composite additive repair can be realized by the following steps:
the method comprises the following steps: scanning a to-be-repaired piece to obtain three-dimensional point cloud, and reconstructing, splicing and trimming a computer curved surface to obtain a three-dimensional model of a repair target;
step two: dispersing the three-dimensional model into layered slices with certain thickness and sequence and obtaining a specific scanning repair path;
step three: laser-MIG composite additive repair;
the method comprises the following steps that a laser cladding head 3 and an MIG welding gun 2 are connected with a conversion head 4 above a workbench and move along a specified path direction to carry out laser-MIG composite additive repair, and the method comprises the specific operation steps of firstly utilizing the laser cladding head 3 to carry out first-layer repair of a repair target in a powder feeding mode, and then adopting a repair strategy that the MIG welding gun 2 is utilized to carry out repair on a position with a larger damaged size in a wire feeding mode, the laser cladding head 3 is utilized to carry out repair on a position with a smaller damaged size in a powder feeding mode, welding wires are output by the MIG welding gun 2, and repair powder is coaxially sent out by the laser cladding head 3; in addition, in order to obtain a good side wall fusion effect in the edge area of the repair target and realize high-quality repair of the damaged structural member, the edge area is repaired by adopting a powder feeding mode.
The used composite additive repair damaged structural member material is TC4 titanium alloy, the filling materials are TC4 titanium alloy wire and TC4 titanium alloy powder, the diameter of the wire is 1.2mm, the particle size of the powder is 50um-100um, and the composite additive repair process parameters are as follows: the laser power is 1500W, the arc current is 125A, the arc voltage is 25V, the scanning speed is 6mm/s, the wire feeding speed is 8m/min, the powder feeding rate is 4g/min, the protective gas is 99.99 percent high-purity argon, and the flow is 15L/min. Firstly, performing first-layer repair on a repair target by using a laser cladding head 3 in a powder feeding mode; secondly, performing additive repair on the position with larger damaged size of the structural part layer by using an MIG welding gun 2, repairing the damaged position in the edge area in a powder feeding mode, stopping feeding the wire when the height of the remaining unrepaired part is less than or equal to 1.2mm, finishing the MIG additive repair, and operating a robot by using a laser cladding head 3 through a computer control system 5 to perform LMD repair so as to improve the repair precision. And after the repairing process is finished, three-dimensional scanning is carried out on the damaged structural part after repairing is finished, the obtained three-dimensional model is compared with the three-dimensional model of the undamaged structural part, if the repairing recovery goodness of fit is less than 95%, the first step is continued, otherwise, wire feeding and powder feeding are stopped, and a laser and an MIG welding machine are turned off.
And after the repairing result meets the requirement and the repairing process is finished, closing the laser-MIG (metal inert gas) based composite material increase repairing device.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (7)
1. A device based on laser-MIG composite material increase is restoreed which characterized in that: the system comprises a computer control system (5) and a laser-MIG composite additive repair system;
the computer control system (5) is connected with a laser-MIG composite additive repair system; the laser-MIG composite additive repair system comprises: the device comprises a MIG welding gun (2), a laser cladding head (3) and a conversion head (4); the computer control system (5) is used for controlling a scanning path of a laser cladding head and an MIG welding gun, controlling a laser-MIG composite material increase repair system to select a proper repair strategy and judging whether the repair process is finished; the repair strategy is as follows: firstly, repairing a first layer of a repaired target by using the laser cladding head (3) in a powder feeding mode, and then adopting a repairing strategy that the repair of a position with a larger damaged size is carried out by using the MIG welding gun (2) in a wire feeding mode, the repair of a position with a smaller damaged size is carried out by using the laser cladding head (3) in a powder feeding mode, a welding wire is output by the MIG welding gun (2), and powder for repair is coaxially sent out by the laser cladding head (3); repairing the edge area in a powder feeding mode; judging whether the repairing process is finished: and (3) carrying out three-dimensional scanning on the damaged structural part after repair, comparing the obtained three-dimensional model with the three-dimensional model of the undamaged structural part, continuing to carry out the step one if the repair recovery goodness of fit is less than 95%, otherwise, stopping wire feeding and powder feeding, and turning off a laser and an MIG welding machine.
2. The apparatus of claim 1, wherein: MIG welder (2) with laser cladding head (3) all with conversion head (4) are connected, and can rotate according to actual restoration demand conversion head (4), thereby realize MIG welder (2) with the selection and use of laser cladding head (3).
3. The apparatus of claim 1, wherein: the repair strategy is as follows: firstly, performing first-layer repair on a repair target by using a laser cladding head in a powder feeding mode; secondly, performing material increase repair on the position of the structural part with larger damaged size layer by using an MIG welding gun, repairing the position in the edge area by adopting a powder feeding mode, stopping feeding the wire when the height of the remaining unrepaired part is less than or equal to 1.2mm, finishing the MIG material increase repair, and operating a robot by using a computer control system to perform LMD repair by using a laser cladding head so as to improve the repair precision.
4. The apparatus of claim 1, wherein: accurate three-dimensional point cloud is obtained through scanning of the damaged structural part (1), a three-dimensional model of a repair target is obtained through computer curved surface reconstruction, splicing and trimming, and a proper material adding mode is designed for repair according to the specific shape and size of the damage.
5. A method based on laser-MIG composite additive repair is characterized by comprising the following steps:
the method comprises the following steps: scanning a damaged structural part (1) to obtain three-dimensional point cloud, and reconstructing, splicing and trimming a computer curved surface to obtain a three-dimensional model of a repair target;
step two: dispersing the three-dimensional model into layered slices with certain thickness and sequence and obtaining a specific scanning repair path;
step three: laser-MIG composite additive repair;
above the workbench, the laser cladding head (3) and the MIG welding gun (2) are connected with the conversion head (4) and move along a specified path direction to carry out laser-MIG composite additive repair, and the adopted repair strategy is as follows: firstly, performing first-layer repair on a repair target by using the laser cladding head (3) in a powder feeding mode, then performing repair on a position with a larger damaged size by using the MIG welding gun (2) in a powder feeding mode, performing repair on a position with a smaller damaged size by using the laser cladding head (3) in a powder feeding mode, outputting a welding wire by using the MIG welding gun (2), and coaxially feeding repair powder out by using the laser cladding head (3); repairing the edge area in a powder feeding mode;
step four: the computer control system (5) judges whether the laser-MIG composite material increase repair process is finished or not; if not, continuing to perform the third step; and if the repair is finished, three-dimensional scanning is carried out on the damaged structural part (1) which is repaired again, the obtained three-dimensional model is compared with the three-dimensional model of the undamaged structural part, if the repair recovery goodness of fit is less than 95%, the first step is continued, otherwise, wire feeding and powder feeding are stopped, and a laser and an MIG welding machine are turned off.
6. The method of claim 5, wherein: laser cladding head (3) with impaired structure (1) is perpendicular, MIG welder (2) with impaired structure (1) is perpendicular.
7. The method of claim 5, wherein: the laser beam is generated by a solid laser or a fiber laser, the electric arc is generated by an MIG welding power supply and is in direct current reverse connection, the electric arc and the laser beam are not generated simultaneously, and only one heat source is used for repairing each time.
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| CN202110783108.2A CN113458605A (en) | 2021-07-12 | 2021-07-12 | Device and method based on laser-MIG composite additive repair |
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2021
- 2021-07-12 CN CN202110783108.2A patent/CN113458605A/en active Pending
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Application publication date: 20211001 |