CN108115134B - Device for manufacturing local dry area for underwater scanning type laser additive manufacturing - Google Patents

Device for manufacturing local dry area for underwater scanning type laser additive manufacturing Download PDF

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Publication number
CN108115134B
CN108115134B CN201711419403.XA CN201711419403A CN108115134B CN 108115134 B CN108115134 B CN 108115134B CN 201711419403 A CN201711419403 A CN 201711419403A CN 108115134 B CN108115134 B CN 108115134B
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China
Prior art keywords
shell
cavity shell
sliding
interface
laser additive
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CN201711419403.XA
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Chinese (zh)
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CN108115134A (en
Inventor
倪中华
严岩
孙桂芳
孙东科
赵古田
陈科
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Southeast University
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Southeast University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F12/00Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/10Formation of a green body
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20Direct sintering or melting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/003Apparatus, e.g. furnaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention discloses a device for manufacturing a local dry area to carry out underwater scanning type laser additive manufacturing, which comprises an inner cavity shell, wherein a balance air interface is arranged on the inner cavity shell, a long hole is formed in the top of the inner cavity shell, and a laser pipeline interface is arranged in the long hole; a group of sliding guide rails are arranged in the inner cavity shell, sliding baffles are arranged between the sliding guide rails, the laser pipeline interface is connected with the sliding baffles in a sealing mode, a sealing piece is arranged between the sliding baffles and the inner cavity shell, and a pipeline fixing device is arranged on the laser pipeline interface. According to the device for manufacturing the local dry area for the underwater scanning type laser additive manufacturing, the movement separation of the laser cladding head and the drainage device is realized through the sliding baffle, and the problem that the traditional follow-up drainage device cannot perform water-resisting protection on a processed area is solved.

Description

Device for manufacturing local dry area for underwater scanning type laser additive manufacturing
Technical Field
The invention relates to the technical field of underwater processing, in particular to a device for manufacturing a local dry area for underwater scanning type laser additive manufacturing.
Background
The underwater laser additive manufacturing is mainly divided into a dry method and a wet method and is used for repairing and maintaining underwater damage of equipment such as ships, reactors, ocean mining platforms and the like, and the two underwater processing methods are mainly different in whether a laser light path is in contact with a water body or not. Relevant experiments of wet laser additive manufacturing prove that when the thickness of a water body through which laser passes is more than 8-10mm, laser energy is completely absorbed by the water body, and a heat influence area cannot be formed on the surface of a workpiece; and the extra drainage device is installed under water in the dry processing to form an underwater local dry area, the laser additive manufacturing process can be carried out in the dry area, the consumption of a water body to laser energy is effectively avoided, the cooling speed of the surface of a workpiece can be reduced, and the probability of cracks is reduced. The existing devices for manufacturing the underwater local dry area are divided into two types, one is to manufacture a large pressure cabin for operators to enter and repair, and the other is to add a small water discharge nozzle at the tail end of laser equipment and discharge the water on the surface of a workpiece to be processed through high-speed gas. The large pressure bin is expensive in manufacturing cost and inconvenient to carry, so that the large pressure bin is only used for maintaining certain special devices; the nozzle type drainage device gradually becomes a key development direction of underwater laser processing due to small volume, easy installation and low requirement on the shape of a workpiece.
however, the current underwater laser processing nozzles in the research field and the market are all follow-up nozzles, i.e., the nozzles are relatively fixed with the laser equipment and can move in position along with the scanning movement of the laser; although the current machining position can be effectively protected from being interfered by the water body, other workpiece materials on the scanning path are exposed in the water body, the cooling speed of the machined workpiece is greatly increased, the toughness and the plasticity of the material are reduced, and cracks are easily generated.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a device for manufacturing a local dry area for underwater scanning type laser additive manufacturing.
The technical scheme is as follows: in order to solve the technical problem, the device for manufacturing the local dry area for underwater scanning type laser additive manufacturing comprises an inner cavity shell, wherein a balance gas interface is arranged on the inner cavity shell, a long hole is formed in the top of the inner cavity shell, and a laser pipeline interface is arranged in the long hole; a group of sliding guide rails are arranged in the inner cavity shell, sliding baffles are arranged between the sliding guide rails, the laser pipeline interface is connected with the sliding baffles in a sealing mode, a sealing piece is arranged between the sliding baffles and the inner cavity shell, and a pipeline fixing device is arranged on the laser pipeline interface.
Wherein, the outer side of the inner cavity shell is provided with a shell body, the inner cavity shell is provided with a balance air interface penetrating out of the shell body, a main drainage air path is formed between the shell body and the inner cavity shell, and the shell body is provided with a drainage air interface ventilating into the main drainage air path.
Wherein a support is provided between the inner chamber housing and the outer housing.
The support piece is a wedge-shaped component with an inclined upper surface, and the inclined upper surface is positioned below the upper water draining air interface.
The edges of the outer shell and the inner cavity shell extend downwards, and a main drainage air passage is formed between the outer shell and the inner cavity shell.
The edges of the outer shell and the inner cavity shell extend downwards vertically and extend obliquely outwards at the end part extending vertically.
The longitudinal section of each sliding guide rail is of an asymmetric U-shaped structure, the top of the long edge of the U-shaped structure is fixedly connected with the inner cavity shell, the inner side surface of the long edge is provided with a ball, and the top of the short edge of the U-shaped structure is provided with a ball.
Wherein, a heat treatment device is arranged in the inner cavity shell.
Wherein, a monitoring device is arranged in the inner cavity shell. By integrating the heat treatment and monitoring device in the inner cavity, the laser additive formed part can be subjected to controllable preheating and heat preservation heat treatment, the tissue form and the mechanical property of the formed part are improved, and the hot cracking defect caused by rapid heating and cooling is avoided.
The balance air interface is located at the limit position of the sliding baffle, and the air outlet of the balance air interface is not blocked by the sliding baffle.
Has the advantages that: the device for manufacturing the local dry area for the underwater scanning type laser additive manufacturing has the following beneficial effects:
The movement separation of the laser cladding head and the drainage device is realized through the sliding baffle, and the problem that the traditional follow-up drainage device cannot protect a processed area from water is solved.
Drawings
FIG. 1 is a cross-sectional view of the present invention in a symmetrical configuration with the other half of the view hidden;
FIG. 2 is a cross-sectional view of another embodiment of the present invention, the present invention being a symmetrical structure, the other half of which is hidden;
FIG. 3 is an enlarged schematic view of section A of FIGS. 1 and 2;
FIG. 4 is a perspective view of the present invention;
FIG. 5 is a schematic bottom view of the present invention;
FIG. 6 is a schematic view of the inner chamber housing sidewall positioning monitoring device and the thermal treatment device;
Fig. 7 is a schematic longitudinal cross-section of the present invention.
In the figure, 1-balance gas interface; 2-a water and air drainage interface; 3-laser pipeline interface; 4-an outer shell; 5-an inner cavity shell; 6-a sliding guide rail; 7-a sliding baffle; 8-a support member; 9-a seal; 10-a pipeline fixing device; 11-a monitoring device; 12-a heat treatment device; 61-a ball; 62-a drainage channel.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 to 5, the device for manufacturing a local dry area for underwater scanning type laser additive manufacturing includes an inner cavity housing 5, wherein a balance gas interface 1 is arranged on the inner cavity housing 5, a long hole is arranged at the top of the inner cavity housing 5, and a laser pipeline interface 3 is arranged in the long hole; a group of sliding guide rails 6 are arranged in the inner cavity shell 5, sliding baffles 7 are arranged between the sliding guide rails 6, the laser pipeline interface 3 is connected with the sliding baffles 7 in a sealing mode, a sealing piece 9 is arranged between the sliding baffles 7 and the inner cavity shell 5, and a pipeline fixing device 10 is arranged on the laser pipeline interface 3. An outer shell 4 is arranged on the outer side of the inner cavity shell 5, a balance air interface 1 penetrating out of the outer shell 4 is arranged on the inner cavity shell 5, a main drainage air path is formed between the outer shell 4 and the inner cavity shell 5, and a drainage air interface 2 ventilating into the main drainage air path is arranged on the outer shell 4. A wedge-shaped support 8 is arranged between the inner chamber shell 5 and the outer shell 4, and the support 8 is arranged below the upper drainage water interface 2. Specifically, the support member 8 has an inclined upper surface, which is a wedge-shaped structure as a whole, and is disposed in the direction shown in fig. 1 and 2 below the upper drain water receiving port 2. The balance gas port 1 is located at the extreme position of the sliding baffle 7, and the gas outlet of the balance gas port is not blocked by the sliding baffle 7.
As an embodiment, as shown in fig. 1, the edges of the outer housing 4 and the inner chamber housing 5 extend downward, and a main drain air passage is formed between the outer housing 4 and the inner chamber housing 5.
As another embodiment, as shown in fig. 2, the outer case 4 and the edge of the inner case 5 extend vertically downward and are inclined outward at the end of the vertical extension.
As shown in fig. 7, the longitudinal section of each slide rail 6 is an asymmetric U-shaped structure, the top of the long side of the U-shaped structure is fixedly connected with the inner cavity housing 5, the inner side surface of the long side is provided with a ball 61, the top of the short side of the U-shaped structure is provided with a ball 61, and the bottom in the slide rail 6 of the U-shaped structure is provided with a drainage channel 62.
As shown in fig. 6, a heat treatment device 12 and a monitoring device 11 are provided in the cavity housing 5.
Specifically, a main area component consisting of a balance gas interface 1, an inner cavity shell 5, a sliding track 6, a sliding baffle 7 and a sealing piece 9 forms a working dry area under water by using high-pressure gas as a medium for balancing hydraulic pressure, and also comprises a main exhaust component consisting of a water exhaust gas interface 2, an outer shell 4 and a supporting piece 8, wherein high-pressure high-speed gas is introduced into the water exhaust gas interface 2, and a large-range gas curtain is formed on the outer ring of the device to prevent a water body from flowing to the main working dry area; the center of the sliding baffle 7 is provided with a hole, the sliding baffle is connected with the laser pipeline interface 3 through a sealing thread, the reciprocating motion in the direction of single degree of freedom is realized by utilizing the sliding guide rail 6, and the scanning type laser additive manufacturing in the underwater dry region is realized.
In the whole using process, the positions of the main working dry area and the drainage gas path are not changed, namely the positions of the areas surrounded by the inner cavity shell 5 and the outer shell 4 are fixed relative to the position of a processing workpiece; only the laser pipe joint 3 and the slide shutter 7 perform the joint reciprocating motion. The protection range of the main working dry area comprises not only workpiece materials undergoing material addition below the laser pipeline interface 3, but also other finished or unreached processing positions on a scanning line and cavity space for installing heat treatment and monitoring equipment.
The underwater dry area is divided into two parts by the inner cavity shell 5, and high-pressure gas is respectively introduced for drainage; the implementation device comprises: a main drainage air passage which is made of an inner cavity shell 5 and an outer shell 4 in an interlayer and inclines outwards; a main working dry area surrounded by the inner cavity shell 5 and formed by balance gas, and a sliding guide rail 6 and a sliding baffle 7 are arranged in the main working dry area. The slide guide 6 is mounted on the top of the inner chamber housing 5 to press the slide shutter 7 against the inner chamber housing wall surface S1 to form a slide sealing surface with the upper surface S2 of the slide shutter 7, preventing water from entering from the upper rectangular long hole of the inner chamber housing 5 when submerged in water. The scanning type processing process is realized by driving the sliding baffle 7 to move on the sliding guide rail 6 through the movement of the laser pipeline interface 3. A sealing groove with a rectangular cross section is distributed on the inner side of the inner cavity shell 5, and a sealing strip is arranged in the groove to seal between the fixing surface S1 and the sliding surface S2; and 4 independent sealing grooves and sealing assemblies are adopted, wherein two sealing grooves are vertical to the scanning direction, and the other two sealing grooves are parallel to the scanning direction and the sliding guide rail 6. The section of the sliding guide rail 6 is of an asymmetric U-shaped structure, the top of a longer U-shaped edge is assembled with the inner cavity shell 5 through welding, the side surface is used for limiting the sliding baffle 7 in the horizontal direction, the contact surface is grooved, and balls 61 are arranged in the grooves to reduce sliding friction resistance; the contact surface of the top of the short edge and the sliding guide rail 7 is used for limiting the sliding baffle 7 in the vertical direction, the contact surface is grooved, and balls 61 are arranged to reduce sliding resistance; the space enclosed by the U-shaped cross-section serves as a water drainage channel 62 for collecting water vapor condensed at the top of the vapor during the additive manufacturing process and small amounts of water leaking from between the sliding parts. The center of the sliding baffle 7 is provided with a hole and is processed with a sealing thread for installing the laser pipeline connector 3, and the laser pipeline connector 3 is provided with a pipeline fixing device 10. The size of the sliding baffle 7 perpendicular to the scanning direction is larger than the size of the top opening of the inner cavity shell 5 and the span of the sealing groove; the dimensional parameters parallel to the scanning direction are designed according to the following steps: it is sufficient to cover the top opening of the lumen housing 5 when the laser lines are respectively in the scanning limit positions.
The laser pipeline interface 3 is provided with a limiting ring and is matched with a pipeline fixing device 10 to clamp the sliding baffle 7 up and down; the pipeline fixing device 10 is assembled on the laser pipeline interface 3 through a sealing thread; an annular sealing gasket is arranged between the pipeline fixing device 10 and the sliding baffle 7.
The balance gas interface 1 is positioned at the limit position of the sliding baffle 7 and extends towards two sides, so that the inlet is not blocked by the sliding baffle 7; the balance gas interface 1 is respectively assembled with the inner cavity shell 5 and the outer shell 4 through sealing threads, and the tail end of the balance gas interface 1 is positioned on the inner cavity shell 5.
As shown in fig. 1 and 2, a support member 8 is arranged in the main exhaust gas channel to mount the outer shell 4 on the inner cavity shell 5 and guide the gas in the interlayer to both sides by an additional wedge structure; the wedge-shaped structure is positioned right below the drainage gas inlet 2, and the wedge-shaped edge and the central line of the drainage gas inlet are in the same vertical plane. The exhaust gas inlet 2 is assembled with a threaded hole on the outer shell 4 through sealing threads, and the opening of the exhaust gas inlet 2 is positioned on the outer shell 4.
As shown in fig. 4, a heat treatment apparatus 12 and a machining process monitoring apparatus 11 are installed on the inner side surface of the inner chamber case 5; the design principle of the installation height is to direct the monitoring and heating direction to the processing area located in the middle of the main workdry area.
The whole device is arranged at the tail end of the laser head, and the laser head is operated by a manipulator to position and move the spatial position. When the laser head and the device hover in the air to prepare for launching, the air exhaust is started, and the whole launching, processing and rising processes are always kept in an air exhaust state; after the workpiece reaches the processing station, the distance between the tail end of the device and the surface of the workpiece is preferably 3mm, and the device is fixed through a manipulator belt attaching clamp; checking whether the height and the humidity of the water body in the cavity meet the processing requirements through a monitoring device, preheating the processing surface after checking that no fault exists, setting the preheating temperature according to the material of the additive substrate, wherein the parameter determination method is well known by the technical personnel in the field; after the processing surface reaches a preset temperature, laser additive manufacturing is carried out, the sliding baffle 7 and the laser pipeline 3 are linked to realize the movement on a scanning type processing path, laser processing parameters are set according to the material of an additive substrate, and the parameter determination method is well known by the technical personnel in the field; after the laser additive manufacturing process technology, the heat treatment device is used again for heat preservation, the heat preservation temperature and time are set according to the material of the additive substrate, and the parameter determination method is well known to those skilled in the art; and then the whole processing process is finished, and the device ascends along with the manipulator and floats out of the water surface.
In the apparatus shown in fig. 1, the inner cavity housing 5 and the slide shutter 7 together constitute the main working area for implementing the scanning laser additive manufacturing, and the two opposite faces S1 and S2 are machined to be flat with low friction coefficient to implement the slider sealing, the surface parameters of which are not shown in detail since such sealing systems are well known to those skilled in the art. Because the air pressure in the dry zone is usually slightly higher than the hydraulic pressure above the sliding baffle due to the underwater exhaust requirement, the S2 is always pressed on the S1, and an additional pressing device is not needed. The components for realizing scanning movement are a sliding baffle 7 moving along a sliding guide rail 6 and a laser pipeline interface 3 connected with the sliding baffle, the laser pipeline interface can be installed through an opening at the top of the inner cavity shell 5, and scanning processing is carried out in the main working trunk area. The gas for maintaining the main working dry zone enters from the balance gas port 1, the pressure and flow rate parameters of which are not shown in detail because they need to be adjusted according to the working water depth, preferably the gas pressure is slightly higher than the hydraulic pressure at the bottom of the device, and the flow rate is 3-5 m/s. The gas for draining enters the interlayer of the outer shell 4 and the inner cavity shell 5 from the drainage gas interface 2 and is guided by the wedge structure attached to the support 8, and the preferred scheme of pressure and flow rate parameter setting is as follows: the gas pressure is slightly higher than the hydraulic pressure at the bottom of the device, and the flow speed is 8-10 m/s.
The inclination angle of the drainage gas path is preferably 45 degrees, and can be adjusted according to the drainage gas flow and the shell material, or a partial inclined structure with the upper section vertical and the lower section inclined is adopted, as shown in fig. 2, the section length is also adapted according to the drainage gas flow. The drainage gas circuit inlets are preferably 4 and symmetrically distributed, the number of the inlets can be reduced or increased according to the working water depth and the drainage gas flow working condition, but the positions are preferably symmetrical axes, and the gas flows on the two sides are ensured to be the same. The sliding sealing strip is preferably rectangular in section, and can be rectangular, circular or cross-shaped according to the strip material, or used in combination, so that the sealing requirements under two working conditions of vertical and parallel sliding are met. The preferred scheme of seal groove is for adopting 4 independent seal grooves and sealing member, and wherein two are perpendicular with scanning direction, and two are parallel with scanning direction in addition, can choose annular seal groove as required according to the sealing member, are about to above-mentioned 4 independent seal grooves break through, form whole sealed to the annular sealing member of reselecting the match again. The laser pipeline is a general device in the technical field, preferably adopts a coaxial powder feeding type laser light path, if the processed material needs to adopt a wire feeding form, a wire feeding hole can be additionally arranged on the side surface of the device, and the tail end of the hole is positioned on the inner cavity shell. The upper part of the sliding baffle 7 is preferably provided with a rectangular hole, and the shape of the rectangular hole, such as an oval shape, can be properly modified according to the requirements of peripheral equipment.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (9)

1. An apparatus for manufacturing a localized stem region for underwater scanning laser additive manufacturing, comprising: the laser tube comprises an inner cavity shell, wherein a balance gas interface is arranged on the inner cavity shell, a long hole is formed in the top of the inner cavity shell, and a laser pipeline interface is arranged in the long hole; a group of sliding guide rails are arranged in the inner cavity shell, sliding baffles are arranged between the sliding guide rails, the laser pipeline interface is hermetically connected with the sliding baffles, a sealing element is arranged between the sliding baffles and the inner cavity shell, and a pipeline fixing device is arranged on the laser pipeline interface; the outer side of the inner cavity shell is provided with a shell body, a balance air interface penetrating out of the shell body is arranged on the inner cavity shell, a main drainage air path is formed between the shell body and the inner cavity shell, and a drainage air interface ventilating into the main drainage air path is arranged on the shell body.
2. The apparatus for manufacturing localized stem regions for underwater scanning laser additive manufacturing of claim 1, wherein: a support is disposed between the inner housing and the outer housing.
3. The apparatus for manufacturing localized stem regions for underwater scanning laser additive manufacturing of claim 2, wherein: the support piece is a wedge-shaped part with an inclined upper surface, and the inclined upper surface is positioned below the upper water draining air interface.
4. The apparatus for manufacturing localized stem regions for underwater scanning laser additive manufacturing of claim 1, wherein: the edges of the outer shell and the inner cavity shell extend downwards, and a main drainage gas path is formed between the outer shell and the inner cavity shell.
5. The apparatus for manufacturing localized stem regions for underwater scanning laser additive manufacturing of claim 1, wherein: the edges of the outer shell and the inner cavity shell extend downwards vertically and extend obliquely outwards at the end part extending vertically.
6. The apparatus for manufacturing localized stem regions for underwater scanning laser additive manufacturing of claim 1, wherein: the longitudinal section of each sliding guide rail is of an asymmetric U-shaped structure, the top of the long edge of the U-shaped structure is fixedly connected with the inner cavity shell, the inner side surface of the long edge is provided with a ball, and the top of the short edge of the U-shaped structure is provided with a ball.
7. The apparatus for manufacturing localized stem regions for underwater scanning laser additive manufacturing of claim 1, wherein: a heat treatment device is arranged in the inner cavity shell.
8. The apparatus for manufacturing localized stem regions for underwater scanning laser additive manufacturing of claim 1, wherein: a monitoring device is arranged in the inner cavity shell.
9. The apparatus for manufacturing localized stem regions for underwater scanning laser additive manufacturing of claim 1, wherein: the balance air interface is positioned at the extreme position of the sliding baffle, and the air outlet of the balance air interface is not blocked by the sliding baffle.
CN201711419403.XA 2017-12-25 2017-12-25 Device for manufacturing local dry area for underwater scanning type laser additive manufacturing Active CN108115134B (en)

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CN108115134B true CN108115134B (en) 2019-12-10

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CN111118494A (en) * 2020-01-14 2020-05-08 西安交通大学 Method and device for preparing coating by synchronous powder feeding underwater laser cladding

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JPH071171A (en) * 1993-06-17 1995-01-06 Ishikawajima Harima Heavy Ind Co Ltd Underwater laser beam welding equipment and welding method
JPH11786A (en) * 1997-06-10 1999-01-06 Ishikawajima Harima Heavy Ind Co Ltd Underwater laser water jet composite cutting device
CN202114422U (en) * 2011-06-03 2012-01-18 北京石油化工学院 Double-layer gas chamber type local dry method underwater welding device
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