CN111349924B - Underwater laser-cold spraying composite deposition device - Google Patents
Underwater laser-cold spraying composite deposition device Download PDFInfo
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- CN111349924B CN111349924B CN201911394026.8A CN201911394026A CN111349924B CN 111349924 B CN111349924 B CN 111349924B CN 201911394026 A CN201911394026 A CN 201911394026A CN 111349924 B CN111349924 B CN 111349924B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus 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
- B22F12/50—Means for feeding of material, e.g. heads
- B22F12/53—Nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus 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
- B22F12/40—Radiation means
- B22F12/49—Scanners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE 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
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses an underwater laser-cold spray composite deposition device, which comprises a drainage outer cover, a drainage inner cover, a powder feeding head and a vibrating mirror device, wherein the drainage outer cover is arranged on the inner cover; the water discharging device comprises a water discharging outer cover and a water discharging inner cover; the powder feeding head comprises a cavity body, and the cavity body comprises a columnar cavity and a conical head; a powder feeding channel is arranged in the cavity, and powder conveyed by the powder feeding channel can fall to a part to be processed of the workpiece; the conical head is suspended in the inner drainage cover, and the outer wall of the columnar cavity is respectively connected and fixed with the closed end of the outer drainage cover and the closed end of the inner drainage cover; the galvanometer device comprises a galvanometer protective shell, a first lens and a second lens; the first lens and the second lens are respectively arranged in the galvanometer protective shell; the laser of penetrating into the protective housing can be projected on the first lens, after the first lens reflects, can be projected on the second lens, after the second lens reflects, can follow and shake the mirror protective housing and export the position of waiting to process of work piece. Therefore, the underwater laser-cold spraying composite deposition method can realize underwater laser-cold spraying composite deposition.
Description
Technical Field
The invention belongs to the technical field of underwater laser processing, relates to an underwater laser deposition device, and particularly relates to an underwater laser-cold spraying composite deposition device.
Background
The cold spraying technology is also called as gas dynamic spraying technology, and is a method for forming a coating by depositing high-speed solid particles with certain plasticity after colliding with a matrix and performing strong plastic deformation. High-pressure gas is usually used as an accelerating medium, spraying powder is carried into a specially designed nozzle to be accelerated to form supersonic gas-solid two-phase flow, and spraying particles collide with a matrix in a solid state and are deposited to form a coating through violent plastic deformation. The coating formed by cold spraying is compact, and residual compressive stress is in the coating, so that the thick coating can be prepared. Cold spraying can be applied to additive manufacturing, and cold spraying also has extensive prospect in the aspect of equipment restoration, can realize the quick restoration in the scene of failure part, but single cold spraying technique still has following shortcoming:
(1) when the coating material with high hardness is deposited, helium is needed as working carrier gas, so that the cost is high;
(2) deposition efficiency and coating quality depend largely on the characteristics of the powder particles and the substrate material;
(3) the bonding of the coating to the substrate is primarily a mechanical bond, and thus the coating has low bond strength.
In the process of synchronously introducing laser into cold spraying, as shown in figure 1, the powder and the matrix are melted by laser energy radiation, the mechanical property and the collision deposition state of the material are instantly adjusted and improved, and the deposition efficiency, the density and the bonding strength of low-pressure cold spraying are improved. Due to the softening effect of laser heating on the powder particles and the base material, the critical deposition speed of the sprayed particles is reduced to half of the original critical deposition speed, the cost can be reduced, the deposition of high-hardness materials is realized, and the range of cold spraying deposition materials is widened.
Chinese patent application publication No. CN105862034A discloses a supersonic laser deposition coaxial powder feeding device, which comprises, as shown in fig. 2, a laser light-emitting cavity, an installation cylinder, a baffle, at least one shielding gas delivery pipe, and at least one laval nozzle, wherein a plurality of laval nozzles are arranged at the periphery of a laser passage, and the central axes of all laval nozzles intersect with laser emitted from the laser light-emitting cavity. Although the supersonic speed laser deposition coaxial powder feeding device realizes the coaxiality of the laser facula and the powder spot without adjusting the relative position of the Laval nozzle and the laser, all the Laval nozzles form a certain angle with the substrate, so that the incident angle of the powder sprayed by the Laval nozzles is larger than 0 degree instead of the optimal vertical incidence, the bonding force of the powder particles and the substrate is directly influenced, and the coating quality is finally reduced.
Disclosure of Invention
In order to optimize the surface quality of a coating and simultaneously realize underwater laser-cold spray composite deposition, the invention discloses an underwater laser-cold spray composite deposition device, which ensures the vertical incidence of powder, improves the metal deposition rate of the powder, can obtain better coating quality and realizes the underwater laser-cold spray composite deposition by utilizing a drainage device.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an underwater laser-cold spray composite deposition device comprises a water drainage outer cover, a water drainage inner cover, a powder feeding head and a galvanometer device, wherein:
the drainage device comprises a drainage outer cover and a drainage inner cover which are of semi-closed structures, and the drainage inner cover is positioned in the drainage outer cover and coaxially arranged;
the powder feeding head comprises a cavity body, and the cavity body comprises a columnar cavity and a conical head which is connected with one end of the columnar cavity and has a gradually reduced inner diameter; a powder feeding channel is arranged in the cavity, and powder conveyed by the powder feeding channel can fall to a part to be processed of the workpiece; the conical head is suspended in the inner drainage cover, the other end of the columnar cavity is positioned at the outer side of the outer drainage cover, and the outer wall of the columnar cavity is fixedly connected with the closed end of the outer drainage cover and the closed end of the inner drainage cover respectively;
the drainage outer cover comprises an outer cover body, a plurality of air inlet pipelines b which are annularly and uniformly distributed and penetrate through the closed end of the outer cover body, and a rubber gasket which is assembled at the open end of the outer cover body;
the inner drainage cover comprises an inner cover body and a plurality of air inlet pipelines a which are annularly and uniformly distributed and are arranged along the wall surface of the inner cover body; each air inlet pipeline a comprises an air inlet section and an air outlet section which are communicated; the air inlet section is linear, the air inlet end of the air inlet section penetrates through the closed end of the inner cover body, and the closed end of the outer cover body is provided with a through hole at a position corresponding to the air inlet end of the air inlet section; the air outlet section is arc-shaped, the air outlet end of the air outlet section penetrates through the open end face of the inner cover body, and the included angle between the axis of the air outlet section and the axis of the powder feeding channel is an acute angle;
the galvanometer device comprises a galvanometer protective shell and two lenses with adjustable angles; the two lenses are respectively a first lens and a second lens; the galvanometer protective shell is a semi-surrounding structure with one end open; the galvanometer protective shell is positioned in the drainage outer cover and is suspended by fixing the open end of the galvanometer protective shell and the closed end of the drainage outer cover;
the first lens and the second lens are respectively arranged in the galvanometer protective shell; and the laser shot into the protective shell can be projected onto the first lens, reflected by the first lens and projected onto the second lens, and reflected by the second lens and output to the part to be processed of the workpiece from the vibrating mirror protective shell.
Furthermore, the outer wall of the columnar cavity is provided with a first outer sleeve flange and a second outer sleeve flange at intervals; the closed ends of the outer drainage cover and the inner drainage cover are correspondingly and coaxially provided with a through hole a and a through hole b; through-hole a, through-hole b all cup joint in the column chamber periphery, and the blind end of the drainage dustcoat in the through-hole a outside is fixed with first overcoat ring flange through the mode that threaded fastener joined in marriage the brill, and the blind end of the drainage inner cover in the through-hole b outside is fixed with second overcoat ring flange through the mode that threaded fastener joined in marriage the brill.
Further, the number of the air inlet pipelines a and b is 8; the air inlet end of the air inlet pipeline a is connected with the air compressor through a pipeline a, and the joint of the air inlet end of the air inlet pipeline a and the pipeline a is sealed through waterproof glue; the air inlet end of the air inlet pipeline b is connected with the air compressor through a pipeline b, and the joint of the air inlet end of the air inlet pipeline b and the pipeline b is sealed through waterproof glue
Further, the rubber gasket include two arc rubber gaskets arranged symmetrically, and the central angle of each arc rubber gasket is 170 °.
Further, an output port of the powder feeding channel is connected with a supersonic nozzle; the powder output by the powder feeding channel can fall to the part to be processed of the workpiece after being accelerated by the supersonic nozzle.
Furthermore, the included angle between the extension line of the light reflected by the first lens and the joint line between the drainage outer cover and the processing surface is 40 degrees, and the included angle between the light reflected by the second lens and the joint line between the drainage outer cover and the processing surface is 25 degrees.
Furthermore, the open end of the vibrating mirror protective shell and the closed end of the drainage outer cover are bonded and sealed through waterproof glue.
According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) according to the underwater laser-cold spraying composite deposition device disclosed by the invention, when the underwater laser-cold spraying composite deposition device works underwater, water is discharged through the inner and outer sets of water discharging devices, so that a local dry environment can be ensured, and stable processing of underwater cold spraying-laser composite deposition can be realized;
(2) by utilizing the mechanical combination of cold spraying and the generation of the surface of a workpiece, when powder and laser interact, a coating with better quality can be quickly formed,
(3) according to the invention, through the galvanometer device, the mutual position of the laser and the powder head is not required to be changed in the processing process, and the laser spot and the powder can be accurately combined to obtain a coating with better quality.
(4) The direction of the spray of the nozzle is vertical to the matrix, so that the binding force of the powder particles and the matrix is improved, and the coating quality is improved.
Drawings
FIG. 1 is a schematic diagram of the principle of supersonic laser deposition;
labeled as: 100-laser head, 200-laval nozzle;
FIG. 2 is a supersonic laser deposition coaxial powder feeding device;
labeled as: 1' -laser light-emitting cavity; 2' -mounting a cylinder; 3' -a baffle plate; 4' -protective gas conveying pipe; 5 ' -Laval nozzle, 6 ' -light-transmitting mirror and 7 ' -high-pressure gas powder conveying pipe; 11' -laser path; 12' -a laser head;
FIG. 3 is a schematic structural diagram in an embodiment of the present invention;
labeled as: 1-powder feeding head; 2-air inlet pipeline a; 3-a first screw hole; 4-a first outer sleeve flange plate; 5-a second screw hole; 6-second outer sleeve flange; 7-inner cover body; 8-the housing body; 9-a drain hole; 10-an arc washer; 11-a conical protective shell; 12-a first galvanometer; 13-inlet line b; 14-a second galvanometer; 15-an optical fiber; 16-glass cement; 17-a powder feeding channel; 18-supersonic nozzle.
Fig. 4 is a schematic view of an arc washer structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The relative arrangement of the components and steps, expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations).
As shown in fig. 3 and 4, the underwater laser-cold spray composite deposition device of the present invention comprises a water discharge outer cover, a water discharge inner cover, a powder feeding head and a galvanometer device, wherein:
the drainage device comprises a drainage outer cover and a drainage inner cover which are of semi-closed structures, and the drainage inner cover is positioned in the drainage outer cover and coaxially arranged;
the drainage outer cover comprises an outer cover body, a plurality of air inlet pipelines b which are annularly and uniformly distributed and penetrate through the closed end of the outer cover body, and a rubber gasket which is assembled at the open end of the outer cover body. Further, the rubber gasket includes two arc rubber gaskets of symmetrical arrangement, and each arc rubber gasket central angle is 170.
The inner drainage cover comprises an inner cover body and a plurality of air inlet pipelines a which are annularly and uniformly distributed and are arranged along the wall surface of the inner cover body; each air inlet pipeline a comprises an air inlet section and an air outlet section which are communicated; the air inlet section is linear, the air inlet end of the air inlet section penetrates through the closed end of the inner cover body, and the closed end of the outer cover body is provided with a through hole at a position corresponding to the air inlet end of the air inlet section; the section of giving vent to anger is the arc form, and the end of giving vent to anger of the section of giving vent to anger runs through the open terminal surface setting of inner cover body, and the axis of the section of giving vent to anger and the contained angle of the axis of powder feeding passageway are the acute angle.
In the application, the number of the air inlet pipelines a and b is 8; the air inlet end of the air inlet pipeline a is connected with the air compressor through a pipeline a, and the joint of the air inlet end of the air inlet pipeline a and the pipeline a is sealed through waterproof glue; the air inlet end of the air inlet pipeline b is connected with the air compressor through a pipeline b, and the joint of the air inlet end of the air inlet pipeline b and the pipeline b is sealed through waterproof glue.
The powder feeding head comprises a cavity body, and the cavity body comprises a columnar cavity and a conical head which is connected with one end of the columnar cavity and has a gradually reduced inner diameter; a powder feeding channel is arranged in the cavity, and an output port of the powder feeding channel is connected with an output end of a supersonic nozzle arranged in the shell. The powder feeding channel is actuated by the supersonic nozzle, and the conveyed powder can fall to a part to be processed of the workpiece; the conical head is suspended in the inner drainage cover, the other end of the columnar cavity is positioned at the outer side of the outer drainage cover, and the outer wall of the columnar cavity is fixedly connected with the closed end of the outer drainage cover and the closed end of the inner drainage cover respectively; specifically, the outer wall of the columnar cavity is provided with a first outer sleeve flange and a second outer sleeve flange at intervals; the closed ends of the outer drainage cover and the inner drainage cover are correspondingly and coaxially provided with a through hole a and a through hole b; through-hole a, through-hole b all cup joint in the column chamber periphery, and the blind end of the drainage dustcoat in the through-hole a outside is fixed with first overcoat ring flange through the mode that threaded fastener joined in marriage the brill, and the blind end of the drainage inner cover in the through-hole b outside is fixed with second overcoat ring flange through the mode that threaded fastener joined in marriage the brill.
The galvanometer device comprises a galvanometer protective shell and two lenses with adjustable angles; the two lenses are respectively a first lens and a second lens; the galvanometer protective shell is a semi-surrounding structure with one end open; the galvanometer protective shell is positioned in the drainage outer cover and is suspended by fixing the open end of the galvanometer protective shell and the closed end of the drainage outer cover; in the invention, the open end of the vibrating mirror protective shell and the closed end of the drainage outer cover are bonded and sealed by waterproof glue.
The first lens and the second lens are respectively arranged in the galvanometer protective shell; and the laser shot into the protective shell can be projected onto the first lens, reflected by the first lens and projected onto the second lens, and reflected by the second lens and output to the part to be processed of the workpiece from the vibrating mirror protective shell.
In order to prevent the light path from interfering with the inner drainage cover, the included angle between the extension line of the light reflected by the first lens and the joint line between the outer drainage cover and the processing surface is 40 degrees, and the included angle between the light reflected by the second lens and the joint line between the outer drainage cover and the processing surface is 25 degrees.
When the invention is used for deposition in an underwater environment, the powder feeding head, the water drainage outer cover, the water drainage inner cover and the galvanometer device are firstly installed. Then the whole device is put under water, and the inner drainage cover begins to drain water. And when the drainage outer cover contacts the surface to be processed, the drainage outer cover begins to drain water.
When the drainage cover creates a local dry environment on the surface of the workpiece, the powder feeding head blows powder on the surface of the workpiece to be processed through the supersonic nozzle; and adjusting a galvanometer, changing a laser light path, and irradiating laser on powder on the surface of the workpiece to finish cold spraying-laser composite deposition processing.
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
The underwater laser-cold spray composite deposition device comprises a powder feeding head, a water drainage outer cover, a water drainage inner cover and a galvanometer device. The drainage inner cover is used for isolating the powder feeding head from external water, the drainage outer cover further ensures the dry environment of a processing area, and the powder feeding head utilizes the supersonic nozzle to beat powder on the surface of a workpiece to be processed.
Specifically, the powder feeding head comprises a supersonic speed spray head and a powder feeding channel, and powder enters the supersonic speed spray head through the powder feeding channel. The supersonic speed spray head accelerates the powder and then hits the surface of the workpiece to be processed.
The inner drainage cover mainly comprises an air inlet pipeline a2, a screw hole 5 and an inner cover body 7, the inner drainage cover is connected with the outer wall of a cylindrical cavity of a powder feeding head through a welding flange (a first outer sleeve flange), the top of the inner drainage cover is uniformly provided with 8 air inlet pipelines a, the air inlet pipeline a is connected with an external air compressor, and when the device enters water, the inner drainage cover starts to drain water to isolate a powder spray head and water.
The drainage outer cover comprises an outer cover body 8, an arc-shaped gasket 10 and an air inlet pipeline b13, the drainage outer cover is connected with the powder feeding head through a welding flange (a second outer cover flange), 8 air inlet pipelines b9 are uniformly arranged at the top of the drainage outer cover, and the air inlet pipeline b9 is connected with an external air compressor; the bottom end of the drainage outer cover is provided with two arc-shaped rubber gaskets with the central angle of 170 degrees, the rubber gaskets are tightly connected with the processing plane, when the drainage outer cover contacts the surface to be processed, the drainage outer cover starts to drain water, and the water is discharged through the gaps of the rubber gaskets to create an internal dry environment; when a dry environment is built in the drainage cover, the supersonic nozzle accelerates the powder and then the powder is sprayed on the surface to be processed.
The drainage dustcoat includes the dustcoat body, inlet port and bottom rubber gasket, and the drainage dustcoat passes through welded flange and send the whitewashed head to be connected, 8 inlet ports of drainage dustcoat top equipartition, and the gas pocket links to each other with outside air compressor machine through the pipeline and carries out the inside drainage of dustcoat, and two arc rubber gaskets are equipped with to drainage dustcoat bottom, and rubber gasket and machined surface zonulae occludens carry out the drainage through the breach of rubber gasket, through adjusting air compressor machine parameter control drainage dustcoat drainage effect.
The mirror vibration device comprises a conical protective shell 11 and two lenses, the conical protective shell is connected with the drainage outer cover shell, the angles of the two lenses are adjustable, the two lenses are respectively arranged in the conical protective shell 11, when powder is beaten on a surface to be processed, the change of a laser light path is realized by changing the relative positions of the two lenses, and the laser-cold spraying composite deposition processing is completed.
During processing, the laser light path can be changed by adjusting the two lenses of the galvanometer device, so that selective melting and sintering are carried out on the formed powder bed, and the powder in a specific area is solidified, so that the powder in a scanning area and the material below the scanning area form firm metallurgical bonding; and after the laser is scanned, spraying the scanned area again by using the supersonic nozzle, continuously scanning the specific area by using the galvanometer device to change the laser light path after the spraying is finished, alternately performing supersonic spraying and selective laser melting, and overlapping layer by layer to form a target part, thereby finally realizing laser-cold spraying composite processing.
Claims (7)
1. The utility model provides an underwater laser-cold spray composite deposition device which characterized in that, includes drainage dustcoat, drainage inner cover, send whitewashed head and galvanometer device, wherein:
the drainage device comprises a drainage outer cover and a drainage inner cover which are both of a semi-closed structure, and the drainage inner cover is positioned in the drainage outer cover and coaxially arranged;
the powder feeding head comprises a cavity body, and the cavity body comprises a columnar cavity and a conical head which is connected with one end of the columnar cavity and has a gradually reduced inner diameter; a powder feeding channel is arranged in the cavity, and powder conveyed by the powder feeding channel can fall to a part to be processed of the workpiece;
the conical head is suspended in the inner drainage cover, the other end of the columnar cavity is positioned at the outer side of the outer drainage cover, and the outer wall of the columnar cavity is fixedly connected with the closed end of the outer drainage cover and the closed end of the inner drainage cover respectively;
the drainage outer cover comprises an outer cover body, a plurality of air inlet pipelines b which are annularly and uniformly distributed and penetrate through the closed end of the outer cover body, and a rubber gasket which is assembled at the open end of the outer cover body;
the inner drainage cover comprises an inner cover body and a plurality of air inlet pipelines a which are annularly and uniformly distributed and are arranged along the wall surface of the inner cover body; each air inlet pipeline a comprises an air inlet section and an air outlet section which are communicated; the air inlet section is linear, the air inlet end of the air inlet section penetrates through the closed end of the inner cover body, and the closed end of the outer cover body is provided with a through hole at a position corresponding to the air inlet end of the air inlet section; the air outlet section is arc-shaped, the air outlet end of the air outlet section penetrates through the open end face of the inner cover body, and the included angle between the axis of the air outlet section and the axis of the powder feeding channel is an acute angle;
the galvanometer device comprises a galvanometer protective shell and two lenses with adjustable angles; the two lenses are respectively a first lens and a second lens;
the galvanometer protective shell is a semi-surrounding structure with one end open; the galvanometer protective shell is positioned in the drainage outer cover and is suspended by fixing the open end of the galvanometer protective shell and the closed end of the drainage outer cover;
the first lens and the second lens are respectively arranged in the galvanometer protective shell; and the laser shot into the protective shell can be projected onto the first lens, reflected by the first lens and projected onto the second lens, and reflected by the second lens and output to the part to be processed of the workpiece from the vibrating mirror protective shell.
2. The underwater laser-cold spray composite deposition device of claim 1, wherein the outer wall of the columnar cavity is provided with a first outer sleeve flange and a second outer sleeve flange at intervals;
the closed ends of the outer drainage cover and the inner drainage cover are correspondingly and coaxially provided with a through hole a and a through hole b;
through-hole a, through-hole b all cup joint in the column chamber periphery, and the blind end of the drainage dustcoat in the through-hole a outside is fixed with first overcoat ring flange through the mode that threaded fastener joined in marriage the brill, and the blind end of the drainage inner cover in the through-hole b outside is fixed with second overcoat ring flange through the mode that threaded fastener joined in marriage the brill.
3. The underwater laser-cold spray composite deposition device of claim 2, wherein the number of the air inlet pipelines a and b is 8;
the air inlet end of the air inlet pipeline a is connected with the air compressor through a pipeline a, and the joint of the air inlet end of the air inlet pipeline a and the pipeline a is sealed through waterproof glue;
the air inlet end of the air inlet pipeline b is connected with the air compressor through a pipeline b, and the joint of the air inlet end of the air inlet pipeline b and the pipeline b is sealed through waterproof glue.
4. The underwater laser-cold spray composite deposition device of claim 2, wherein the rubber gasket comprises two symmetrically arranged arc-shaped rubber gaskets, and the central angle of each arc-shaped rubber gasket is 170 °.
5. The underwater laser-cold spray composite deposition device of claim 2, wherein the output port of the powder feeding channel is connected with a supersonic nozzle; the powder output by the powder feeding channel can fall to the part to be processed of the workpiece after being accelerated by the supersonic nozzle.
6. The underwater laser-cold spray composite deposition device of claim 2, wherein the angle between the extension line of the light reflected by the first lens and the joint line between the water discharge outer cover and the processing surface is 40 °, and the angle between the light reflected by the second lens and the joint line between the water discharge outer cover and the processing surface is 25 °.
7. The underwater laser-cold spray composite deposition device of claim 2, wherein the open end of the vibrating mirror protective shell and the closed end of the drainage outer cover are bonded and sealed through waterproof glue.
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