CN112355472B - Multifunctional underwater welding laser head - Google Patents

Multifunctional underwater welding laser head Download PDF

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Publication number
CN112355472B
CN112355472B CN202011172262.8A CN202011172262A CN112355472B CN 112355472 B CN112355472 B CN 112355472B CN 202011172262 A CN202011172262 A CN 202011172262A CN 112355472 B CN112355472 B CN 112355472B
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China
Prior art keywords
welding
light
wire
laser
waterproof sealing
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Chinese (zh)
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CN112355472A (en
Inventor
郭宁
成奇
付云龙
张迪
王光辉
于梦秋
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Harbin Institute of Technology Weihai
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Harbin Institute of Technology Weihai
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Publication of CN112355472A publication Critical patent/CN112355472A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20Bonding
    • B23K26/21Bonding by welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/12Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70Auxiliary operations or equipment
    • B23K26/702Auxiliary equipment

Abstract

The invention provides a multifunctional underwater welding laser head, which solves the problem of poor welding effect caused by poor water resistance and pressure resistance of the laser head in the traditional laser welding method, and comprises a welding mechanism welding shell and a wire feeding mechanism, wherein the welding mechanism comprises a laser, a spectroscope, a collimating mirror, a focusing mirror and a light-transmitting element, and the output end of the laser sequentially passes through the spectroscope, the collimating mirror, the focusing mirror and the light-transmitting element to a welding part; the welding shell comprises a laser head shell and a waterproof sealing cover, the wire feeding mechanism comprises a wire feeder and a welding wire, the welding wire is arranged at the output end of the wire feeder, the wire feeding mechanism is arranged outside the waterproof sealing cover, and the welding wire penetrates through the waterproof sealing cover to reach the welding part; the invention can be widely applied to the technical field of laser welding.

Description

Multifunctional underwater welding laser head
Technical Field
The invention relates to the technical field of laser welding, in particular to a multifunctional underwater welding laser head.
Background
The laser welding is an efficient and precise welding method which utilizes a laser beam with high energy density as a heat source, and the traditional laser welding method cannot adapt to the underwater welding requirement. In the prior art, the underwater welding laser head with the movable gas hood is adopted to realize underwater welding operation, but the structure is complex, the waterproofness and the pressure resistance of the laser head are poor, and the welding effect is poor.
Therefore, the conventional laser welding method has a problem of poor welding effect due to poor water resistance and pressure resistance of the laser head.
Disclosure of Invention
The utility model provides a multi-functional underwater welding laser head aims at solving traditional laser welding method and has had because of the waterproof nature of laser head and pressure resistance is relatively poor to lead to the relatively poor problem of welding effect.
The application provides a multi-functional welding laser head under water for weld under water to a welding, include:
the welding mechanism comprises laser, a spectroscope, a collimating mirror, a focusing mirror and a light-transmitting element, wherein the output end of the laser sequentially penetrates through the spectroscope, the collimating mirror, the focusing mirror and the light-transmitting element to the welding part;
the welding mechanism comprises a welding shell, a welding mechanism and a welding mechanism, wherein the welding shell comprises a laser head shell and a waterproof sealing cover; and
wire feeder, wire feeder includes wire feeder and welding wire, the welding wire is located the output of wire feeder, wire feeder locates waterproof sealing cover's outside, the welding wire passes waterproof sealing cover extremely the welding piece.
Preferably, the collimating lenses are three, one is set up correspondingly to be set up one focusing lens and one the printing opacity component, three the collimating lenses are first collimating lens, second collimating lens and third collimating lens respectively, three the focusing lens is first focusing lens, second focusing lens and third focusing lens respectively, three the printing opacity component is first printing opacity component, second printing opacity component and third printing opacity component respectively, first focusing lens with the third focusing lens is long focus focusing lens, the second focusing lens is short focus focusing lens.
Preferably, wire feeder still includes and send a protective housing, send a protective housing to locate the outside of sending a machine.
Preferably, the wire feeder further comprises a wire feeding support, and the wire feeder is fixed to the outside of the waterproof sealing cover through the wire feeding support.
Preferably, the wire feeding mechanism further comprises a wire feeding pipe, the wire feeding pipe is arranged outside the welding wire, wire feeding pipe inlets are formed in the waterproof sealing covers, and the wire feeding pipe penetrates through the waterproof sealing covers through the wire feeding pipe inlets.
Preferably, the lower end of the waterproof sealing cover is provided with an air inlet, the air inlet is a bevel air inlet, and the air inlet is arranged above the inlet of the wire feeding pipe.
Preferably, the light-transmitting element comprises high light-transmitting glass and pressure-resistant light-transmitting glass, and the pressure-resistant light-transmitting glass is arranged below the high light-transmitting glass.
Preferably, the top end of the waterproof sealing cover is provided with an optical fiber, a contact end of the optical fiber and the waterproof sealing cover is an optical fiber inlet, and the optical fiber extends into the waterproof sealing cover through the optical fiber inlet.
Preferably, both sides of the lower portion of the light-transmitting element are provided with visual devices, and visual protective shells are arranged outside the visual devices.
Preferably, a baffle bracket is arranged on the periphery of the bottom end of the waterproof sealing cover, a folding baffle is arranged at the tail end of the baffle bracket, and a flexible rubber skirt is arranged at the tail end of the folding baffle.
By arranging the waterproof sealing cover, the problems of water resistance and pressure resistance of laser are solved, so that the laser can work in water environment; by arranging the three condenser lenses, the welding piece is dried and preheated while laser is condensed, water on the surface of the welding piece is prevented from forming steam in the welding or material increase process, the density of laser energy is effectively reduced, the instability of the welding or material increase manufacturing process is avoided, the processes of preheating, welding or material increase manufacturing, post-welding heat treatment and the like can be realized at the same time, and the defects generated in the welding or material increase manufacturing process and the like can be greatly reduced or even eliminated; through setting up the formula air inlet of beveling, realize the laminar flow form motion of the inside gas of waterproof sealing cover, with the water discharge of welding or vibration material disk position department and carry out effectual anti-oxidation protection, welding effect is better.
Drawings
Fig. 1 is a schematic structural diagram of a multifunctional underwater welding laser head according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a multifunctional underwater welding laser head according to another embodiment of the present application.
The symbols in the drawings illustrate that:
1. a welding mechanism; 101. laser; 102. a beam splitter; 103. a collimating mirror; 1031. a first collimating mirror; 1032. a second collimating mirror; 1033. a third collimating mirror; 104. a focusing mirror; 1041. a first focusing mirror; 1042. a second focusing mirror; 1043. a third focusing mirror; 105. a light-transmitting element; 1051. a first light-transmitting element; 1052. a second light-transmitting element; 1053. a third light-transmitting element; 106 a vision device; 2. welding the shell; 201. a laser head housing; 202. a waterproof sealing cover; 203. a wire feeding pipe inlet; 204. an air inlet; 205. a baffle bracket; 206. a folding baffle; 207. a flexible rubber skirt; 3. a wire feeder; 301. a wire feeder; 302. welding wires; 303. a wire feeding protective shell; 304. a wire feeding support; 305. a wire feeding pipe; 4. an optical fiber; 5. an optical fiber entrance.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, a schematic structural diagram of a multifunctional underwater welding laser head according to an embodiment of the present application shows only parts related to the embodiment for convenience of description, and the details are as follows:
in one embodiment, a multifunctional underwater welding laser head for underwater welding of a weld, includes: welding mechanism 1, welding casing 2 and wire feeder 3.
The welding mechanism 1 includes a laser 101, a beam splitter 102, a collimating mirror 103, a focusing mirror 104 and a light transmitting element 105, wherein an output end of the laser 101 sequentially passes through the beam splitter 102, the collimating mirror 103, the focusing mirror 104 and the light transmitting element 105 to a welding part.
Specifically, a beam splitter 102 is arranged at an output end of the laser 101, the beam splitter 102 performs splitting processing on a light beam output by the laser 101, a collimating mirror 103 is arranged below the beam splitter 103, the collimating mirror 103 performs collimation correction on the light beam after the splitting processing to convert the light beam into a parallel light beam and output the parallel light beam, a focusing mirror 104 is arranged below the collimating mirror, the focusing mirror 104 performs condensation processing on the light beam after the collimation correction to focus the parallel light beam, a light-transmitting element 105 is arranged below the focusing mirror 104, and the laser light beam after the condensation processing is output through the light-transmitting element 105, so that the light reflection phenomenon is effectively reduced, and a welding part is subjected to laser welding.
The welding shell 2 comprises a laser head shell 201 and a waterproof sealing cover 202, the laser head shell 201 is arranged outside the welding mechanism 1, and the waterproof sealing cover 202 is arranged outside the laser head shell 201.
Specifically, each part is installed in the inside of laser head casing 201 among the welding mechanism 1, and waterproof sealing cover 202 is located the outside of laser head casing 201, and waterproof sealing cover 202 adopts stainless steel, protects laser head casing 201 and welding mechanism 1 to the welding operation under water of adaptation welding laser head.
The wire feeder 3 includes a wire feeder 301 and a welding wire 302, the welding wire 302 is disposed at an output end of the wire feeder 301, the wire feeder 301 is disposed outside the waterproof sealing cover 202, and the welding wire 302 passes through the waterproof sealing cover 202 to a welding member.
Specifically, the wire feeder 301 is fixed to an outer side wall of the waterproof sealing cover 202, and the wire feeder 301 feeds the welding wire 302, and feeds the welding wire 302 to the inside of the waterproof sealing cover 202 to cooperate with the laser 101 to weld a welding member.
Referring to fig. 2, a schematic structural diagram of a multifunctional underwater welding laser head according to another embodiment of the present application is shown, for convenience of description, only the parts related to the embodiment are shown, and the details are as follows:
in one embodiment, three collimating lenses 103 are provided, one collimating lens 103 is provided with one focusing lens 104 and one light-transmitting element 105 correspondingly, the three collimating lenses 103 are respectively a first collimating lens 1031, a second collimating lens 1032 and a third collimating lens 1033, the three focusing lenses 104 are respectively a first focusing lens 1041, a second focusing lens 1042 and a third focusing lens 1043 correspondingly, the three light-transmitting elements 105 are respectively a first light-transmitting element 1051, a second light-transmitting element 1052 and a third light-transmitting element 1053 correspondingly, the first focusing lens 1041 and the third focusing lens 1033 are both long focusing lenses, and the second focusing lens 1042 is a short focusing lens.
Specifically, the laser 101 is split by the beam splitter 102 and then dispersed into three groups of laser beams, the first group of laser beams is processed by the first collimating mirror 1031, the first focusing mirror 1041 and the first light-transmitting element 1051, and can dry and preheat a welded piece, so as to prevent water on the surface of the welded piece from forming water vapor in the welding or material increasing process, the water vapor on one hand can be ionized under the action of the laser to form light-induced plasma, the light-induced plasma and smoke dust can form aerosol particles after entering into a gas phase, the aerosol particles are gathered around a beam channel to play a certain shielding role on the laser beam, the laser energy density is reduced, the welding or material increasing process is unstable, the water vapor on the other hand enters into a molten pool, and if the water vapor is not discharged in time in the molten pool metal solidification process, air holes are formed; under the action of high-temperature plasma, water is decomposed to form hydrogen and oxygen atoms, the oxygen atoms react with molten pool metal to cause metal oxidation, and the hydrogen atoms can cause the molten pool metal to form hydrogen pores and hydrogen brittleness after being solidified, so that the quality of welding or additive manufacturing is seriously influenced; the first group of light beams can effectively preheat a welding piece, is beneficial to increasing the penetration depth and the penetration width of welding or additive manufacturing, and effectively inhibits welding or additive manufacturing cracks.
The second group of laser beams is processed by the second collimating lens 1032, the second focusing lens 1042 and the second translucent element 1052, and then is matched with the welding wire 302 to operate the welding part, so as to realize operations such as welding or material addition of the welding part.
The third group of laser beams are processed by a third collimating mirror 1033, a third focusing mirror 1043 and a third light-transmitting element 1053, and post-processing and laser polishing operations of welding parts are carried out; because the molten pool metal is rapidly cooled and solidified from a liquid state to a solid state, the residual tensile stress is formed at the welding or additive manufacturing part, the residual tensile stress can increase the sensitivity of stress corrosion of the part, simultaneously, the fatigue performance of the part is reduced, the service life is reduced, and under the impact action of a third group of laser beams, the tensile stress of the part is converted into the compressive stress, so that the adverse effect is converted into the beneficial effect; and because the surface of the welded part after welding or additive manufacturing is uneven, the surface of the welded part can be smoother through the polishing effect of the third group of laser beams, the wettability of subsequent additive manufacturing is increased, and the density between layers is improved.
In one embodiment, the wire feeder 3 further comprises a wire feed containment vessel 303, a wire feed support 304, and a wire feed tube 305.
Specifically, the wire feeding protective shell 303 is arranged outside the wire feeder 301, the wire feeding protective shell 303 is made of stainless steel and protects the wire feeder 301, the wire feeder 301 is fixed outside the waterproof sealing cover 202 through a wire feeding support 304, the wire feeding support 304 is an adjustable support and is convenient for adjusting the wire feeding angle of the wire feeder 301, the wire feeding pipe 305 is arranged outside the welding wire 302, the wire feeding pipe 305 is made of metal, a wire feeding pipe inlet 203 is arranged on the waterproof sealing cover 202, and the wire feeding pipe 305 penetrates through the waterproof sealing cover 202 through the wire feeding pipe inlet 203 and conveys the welding wire 302 to the inside of the waterproof sealing cover 202 for welding operation; the wire feeder 3 is fixed on one side of the first group of laser beams, so that the welding wires can be preheated conveniently, and water vapor on the welding wires can be eliminated.
In one embodiment, the waterproof sealing cover 202 has an air inlet 204 at a lower end thereof, the air inlet 204 is a chamfered air inlet, and the air inlet 204 is disposed above the wire feeding tube inlet 203.
Specifically, the air inlet 204 performs air exhaust operation, so that laminar flow movement of air inside the waterproof sealing cover 202 is realized, water at the welding position can be effectively discharged, and effective anti-oxidation protection is performed.
In one embodiment, the light-transmitting element 105 includes high light-transmitting glass and pressure-resistant light-transmitting glass, and the pressure-resistant light-transmitting glass is disposed below the high light-transmitting glass.
Specifically, the first light-transmitting element 1051 includes first high light-transmitting glass and first withstand voltage light-transmitting glass, the second light-transmitting element 1052 includes second high light-transmitting glass and second withstand voltage light-transmitting glass, the third light-transmitting element 1053 includes third light-transmitting glass and third withstand voltage light-transmitting glass, and the light transmittances of the high light-transmitting glass and the withstand voltage light-transmitting glass are both more than 99%.
In one embodiment, the top end of the waterproof sealing cover 202 is provided with an optical fiber 4, the contact end of the optical fiber 4 and the waterproof sealing cover 202 is provided with an optical fiber inlet 5, and the optical fiber 4 extends into the waterproof sealing cover 202 through the optical fiber inlet 5.
Specifically, the optical fiber 4 enters the interior of the waterproof sealing cover 202 through the optical fiber inlet 5 at the top of the waterproof sealing cover 202, the optical fiber inlet 5 is sealed by a waterproof sealant, and the optical fiber 4 is connected to the outside.
In one embodiment, the two sides below the light-transmitting element 105 are provided with the visual devices 106, and the visual devices 106 are provided with visual protective shells on the outside.
Specifically, the light source of the vision device 106 is aligned with the weld, providing an underwater light source that facilitates locking the position of the weld or additive manufacturing.
In one embodiment, a baffle bracket 205 is arranged at the periphery of the bottom end of the waterproof sealing cover 202, a folding baffle 206 is arranged at the tail end of the baffle bracket 205, and a flexible rubber skirt 207 is arranged at the tail end of the folding baffle 206.
Specifically, the baffle bracket 205 is arranged at the periphery of the bottom end of the waterproof sealing cover 202 and is arranged perpendicular to the waterproof sealing cover 202, the folding baffle 206 is connected with the baffle bracket 205 and is arranged parallel to the waterproof sealing cover, good plasticity and toughness are achieved, and the flexible rubber skirt 207 is arranged at the tail end of the folding baffle.
By arranging the waterproof sealing cover 202, the problems of water resistance and pressure resistance of laser are solved, so that the laser can work in water environment; by arranging two long-focus focusing lenses and one short-focus focusing lens, the processes of preheating, welding or material increase manufacturing, post-welding heat treatment and the like can be realized at the same time, and the defects generated in the processes of welding or material increase manufacturing and the like can be greatly reduced or even eliminated; through setting up the formula air inlet of beveling, realize the laminar flow form motion of the inside gas of waterproof sealing cover, with the water discharge of welding or vibration material disk position department and carry out effectual anti-oxidation protection, welding effect is better.
However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims (9)

1. The utility model provides a multi-functional welding laser head under water for weld under water to the welding spare, its characterized in that includes:
the welding mechanism comprises a laser, a spectroscope, a collimating mirror, a focusing mirror and a light-transmitting element, wherein the output end of the laser sequentially penetrates through the spectroscope, the collimating mirror, the focusing mirror and the light-transmitting element to the welding part;
the number of the collimating lenses is three, one collimating lens is correspondingly provided with one focusing lens and one light-transmitting element, the three collimating lenses are respectively a first collimating lens, a second collimating lens and a third collimating lens, the three focusing lenses are respectively a first focusing lens, a second focusing lens and a third focusing lens, the three light-transmitting elements are respectively a first light-transmitting element, a second light-transmitting element and a third light-transmitting element, the first focusing lens and the third focusing lens are both long-focus focusing lenses, and the second focusing lens is a short-focus focusing lens;
the laser is dispersed into three groups of laser beams after being subjected to light splitting treatment by the spectroscope, and the first group of laser beams are treated by the first collimating lens, the first focusing lens and the first light-transmitting element and can be used for drying and preheating a welding piece; the second group of laser beams are processed by a second collimating lens, a second focusing lens and a second light-transmitting element and then are matched with a welding wire to operate a welding part; the third group of laser beams are processed by a third collimating lens, a third focusing lens and a third light-transmitting element, and post-processing and laser polishing operation of a welding part are carried out; the focal positions of the first group of laser beams and the third group of laser beams are lower than that of the second group of laser beams;
the welding mechanism comprises a welding shell, a welding mechanism and a welding mechanism, wherein the welding shell comprises a laser head shell and a waterproof sealing cover; and
the wire feeding mechanism comprises a wire feeder and a welding wire, the welding wire is arranged at the output end of the wire feeder, the wire feeding mechanism is arranged outside the waterproof sealing cover, and the welding wire penetrates through the waterproof sealing cover to reach the welding part; the wire feeder is fixed on one side of the first group of laser beams, so that the welding wires can be preheated conveniently, and water vapor on the welding wires is eliminated.
2. The multifunctional underwater welding laser head of claim 1, wherein the wire feeder further includes a protective wire feeder shell, the protective wire feeder shell being disposed outside the wire feeder.
3. The multifunctional underwater welding laser head of claim 2, wherein the wire feeder further includes a wire feed support through which the wire feeder is fixed to an exterior of the waterproof sealing enclosure.
4. The multifunctional underwater welding laser head of claim 3, wherein the wire feeder further comprises wire feeding pipes, the wire feeding pipes are arranged outside the welding wires, wire feeding pipe inlets are formed in the waterproof sealing covers, and the wire feeding pipes penetrate through the waterproof sealing covers through the wire feeding pipe inlets.
5. The multifunctional underwater welding laser head of claim 4, wherein an air inlet is formed in the lower end of the waterproof sealing cover, the air inlet is a bevel air inlet, and the air inlet is formed above the inlet of the wire feeding pipe.
6. The multifunctional underwater welding laser head according to claim 1, wherein the light transmitting member includes a high light transmitting glass and a pressure resistant light transmitting glass, and the pressure resistant light transmitting glass is provided below the high light transmitting glass.
7. The multifunctional underwater welding laser head according to claim 1, wherein an optical fiber is arranged at the top end of the waterproof sealing cover, the contact end of the optical fiber and the waterproof sealing cover is set as an optical fiber inlet, and the optical fiber extends into the waterproof sealing cover through the optical fiber inlet.
8. The multifunctional underwater welding laser head of claim 1, wherein visual devices are arranged on two sides below the light-transmitting component, and a visual protective shell is arranged outside the visual devices.
9. The multifunctional underwater welding laser head of claim 1, wherein a baffle bracket is arranged on the periphery of the bottom end of the waterproof sealing cover, a folding baffle is arranged at the tail end of the baffle bracket, and a flexible rubber skirt is arranged at the tail end of the folding baffle.
CN202011172262.8A 2020-10-28 2020-10-28 Multifunctional underwater welding laser head Active CN112355472B (en)

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Application Number Priority Date Filing Date Title
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CN112355472B true CN112355472B (en) 2022-12-13

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Publication number Priority date Publication date Assignee Title
JP4189844B2 (en) * 1998-12-17 2008-12-03 株式会社Ihi Laser irradiation device for underwater laser welding monitor and laser irradiation method for underwater laser welding monitor
JP2011016153A (en) * 2009-07-09 2011-01-27 Toshiba Corp Underwater welding equipment
CN101844273A (en) * 2010-05-31 2010-09-29 南通中远船务工程有限公司 Underwater pulse laser welding method and device for ocean platform
CN103521919B (en) * 2013-10-15 2016-06-22 江苏大学 A kind of method realizing underwater laser welding and laser peening and combination unit
CN205817082U (en) * 2014-04-25 2016-12-21 北京石油化工学院 Laser enhancing high pressure separate injection device
CN109249132A (en) * 2017-07-14 2019-01-22 北京国千智能制造科技研究院有限公司 A kind of underwater laser melt deposition increasing material manufacturing maintenance system and method
CN110640340A (en) * 2018-06-27 2020-01-03 宝山钢铁股份有限公司 Laser welding method for realizing rapid splicing of high-strength steel

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