CN113814417A - 3D printing-based marine supercharger rotor design method - Google Patents
3D printing-based marine supercharger rotor design method Download PDFInfo
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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
- B22F10/40—Structures for supporting workpieces or articles during manufacture and removed afterwards
- B22F10/47—Structures for supporting workpieces or articles during manufacture and removed afterwards characterised by structural features
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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
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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
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
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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
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
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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
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/64—Treatment of workpieces or articles after build-up by thermal means
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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
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/66—Treatment of workpieces or articles after build-up by mechanical means
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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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
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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 additive manufacturing and lightweight design method of a marine supercharger rotor, which solves the problems of overlarge material shearing waste, difficult processing of complex curved surfaces, difficult assembly caused by the traditional processing method and high integrated manufacturing difficulty in the existing manufacturing process, further realizes lightweight optimization design, adopts an internal hollow water-drop-shaped self-supporting structure suitable for metal 3D printing, reduces the weight of a workpiece, releases the residual stress of the workpiece, reduces the stress deformation in the use working condition, improves the manufacturing efficiency of the workpiece and prolongs the effective service life of the workpiece.
Description
Technical Field
The invention relates to a method for manufacturing and designing a marine supercharger rotor in a light weight mode based on 3D printing, in particular to a novel manufacturing and designing method, and belongs to the technical field of material increase manufacturing.
Background
The 3D printing technique, also known as additive manufacturing technique, is one of the rapid prototyping techniques. The method is a technology for finally manufacturing a solid product by stacking, melting, overlapping and forming a powdery metal material layer by using a laser beam, a galvanometer scanning and other modes through a software layering dispersion and numerical control forming system on the basis of a digital model file.
The core principle of 3D printing is 'layered manufacturing, and layer-by-layer superposition', and compared with the traditional 'material reduction manufacturing' manufacturing technology, the 3D printing technology integrates and runs through the technologies of machinery, materials, computers, communication, control technology, biomedicine and the like, and has the obvious advantages of realizing the integrated manufacturing of workpieces with complex shapes, greatly shortening the production period of products, saving a large amount of materials, improving the production efficiency and the like.
Specifically, the method comprises the following steps: firstly, the application field of the 3D printing technology is continuously expanded; secondly, the 3D printing technology is continuously deep in the application level of each application field; moreover, the materialization form of the 3D printing technology is more abundant.
Therefore, the technology inevitably and rapidly permeates into a plurality of fields such as ship manufacturing, aerospace, electric power, automobiles, biomedical molds, casting, electric power, agriculture, household appliances, industrial art and the like in the near future, the design concept of the fields is deeply influenced, and certain popular manufacturing schemes are perfected and even updated by matching with other technologies, so that the manufacturing is more intelligent, simple and green, and the product performance is closer to an ideal state. 3D printing technology has now become one of the most globally interesting emerging technologies. The novel production mode and other digital production modes can promote the realization of the third industrial revolution.
The existing supercharger rotor is formed by adopting split material reduction processing and then welding, the connecting rod part 42CrMo material reduction processing wastes much, and the blade part is made of high-temperature alloy.
Disclosure of Invention
The invention aims to solve the technical problems that the ultra-large shearing material waste, the complex curved surface is difficult to process, the assembly is difficult and the integrated manufacturing is difficult caused by the traditional processing method, and the thin-wall parts are easy to have the processing stress in the prior art.
In order to solve the difficult problems of the prior processing technology, the technical scheme of the invention is as follows, a strip scanning strategy 3D printing mode is adopted, the stress generated in the scanning and printing process is reduced, the scanning speed is optimized, and the connecting rod and the blade are integrally formed.
The invention provides a design method of a marine supercharger rotor based on 3D printing, wherein an internal hollow water-drop-shaped self-supporting structure suitable for metal 3D printing is adopted for a shaft belt, so that the weight of a workpiece is reduced, meanwhile, the residual stress of the workpiece can be released, the stress deformation in the use working condition is reduced, the manufacturing efficiency of the workpiece is improved, and the effective service life of the workpiece is prolonged. Adopting a 3D printing mode, forming by using a strip scanning strategy, and integrally forming the marine supercharger rotor, wherein the marine supercharger rotor comprises a connecting rod, a blade shaft belt and blades connected with the blade shaft belt; the blades are at least 12, are evenly distributed along the axis of the blade shaft band, the shaft parts of the blades and the connecting rods are coaxially and integrally designed, the connecting rods are in a step shape, and are fixedly connected with the blades through threads above the connecting rods, and water-drop-shaped hollow structures are evenly distributed on the blade shaft band;
the supercharger rotor blade shaft belt adopts an internal hollow-out water-drop-shaped self-supporting structure suitable for metal 3D printing, so that the weight of a workpiece is reduced, meanwhile, the residual stress of the workpiece can be released, the stress deformation in the use working condition is reduced, the manufacturing efficiency of the workpiece is improved, and the effective service life of the workpiece is prolonged.
Further, the method comprises the following specific steps:
the method comprises the following steps: three-dimensional modeling of parts, namely modeling a complex shape by adopting Cero three-dimensional software, and constructing a complex curved surface and an integrated design three-dimensional diagram;
step two: processing data of the parts, namely exporting an STL file from Cero three-dimensional software according to the modeling result completed in the previous step, and putting the STL file into data processing software materialism Magics for adding support and layering and slicing; the slice thickness is 0.03-0.05 mm;
step three: selecting a corrosion-resistant and oxidation-resistant material 316L;
step four: 3D printing of the part; through the laser scanning mode, the metal powder that selects in the step three melts according to the scanning strategy and takes shape, after adding the support and confirming technological parameter, carries out the section processing according to the layer thickness with the part, and different part scanning order is from left to right, from the top down direction, except that special cases, the common scanning order of single part: support → entity of part → outline of part, except special cases.
Step five: heat treatment of the parts, special heat treatment at a temperature not exceeding 550 ℃;
step six: post-processing the parts, namely sequentially carrying out bracket cutting, support removing, grinding and polishing on the parts subjected to special heat treatment in the previous step, and carrying out performance detection after the processing is finished;
in the wire cutting, a moving thin metal wire is used as an electrode to perform pulse spark discharge cutting forming on parts. The thin metal wire is copper wire or molybdenum wire, the thin molybdenum wire is used as tool electrode to make cutting, the wire storage cylinder makes the molybdenum wire alternatively move forward and backward, the processing energy source is supplied by pulse power supply, the working solution medium is poured between the electrode wire and the workpiece, the working table respectively makes servo feeding movement according to the preset control program in two coordinate directions of horizontal plane according to the state of spark gap, so that various curve tracks are synthesized, and the workpiece is cut from the substrate.
On the basis of wire cutting, residual support on the parts is removed by using electric or manual tools, such as various pliers, knives, saws, wires, cooperative robots and the like.
Further, in the first step, the complex shape modeling has a front surface and a side surface, and sharp angles less than 30 degrees are avoided, the roughness of the front surface is different from that of the side surface when printing is carried out, and the roughness of the side surface is greater than that of the front surface; during modeling, the position of a workpiece larger than 45 degrees is considered, the angle is larger than or equal to 45 degrees, if the part is placed in any direction, the supporting angle cannot be guaranteed to be smaller than 45 degrees, and an auxiliary supporting structure is added when modeling is needed; modeling is carried out to directly generate stl format, so that multiple format conversion is avoided; the margin of post-processing is also taken into account when modeling.
Furthermore, in the second step, the thickness of the slice is 0.03-0.05mm, and in order to prevent the deformation of the part, a support structure needs to be added at the thin wall of the blade, wherein the thin wall is a part with the width far smaller than the length, and the length direction of the thin wall is 10-20 times of the width direction.
Furthermore, the support structures are block supports with different shapes, and each block support is arranged according to different shapes and different placing angles of the required support position; the block-shaped support surface is provided with square holes which are beneficial to removing mixed powder, and the upper end surface (contact surface with a workpiece) of the block-shaped support is added with a columnar support, so that the binding force between the support and a part shell is increased, and the rotor is prevented from deforming due to thermal stress.
Further, the 3D printing step of the part adopts a specific 3D printing process, preferably filling the scanning power: 300W; contour scan power: 150W; scanning line shift: 0.03 mm. Other parameters are fill scan speed: 1000 mm/s; filling a scanning line gap: 0.1 mm; profile scan speed: 350 mm/s; strip width: 10 mm; strip offset: -0.08 mm; rotation angle between layers: 67 deg..
Further, the heat treatment step of the part, the printed part is carried out with special vacuum heat treatment, the vacuum degree is more than 10-1Pa, slowly raising furnace temperature to 550 ℃, keepingThe temperature is 0.5h, then the temperature is slowly raised to 750 ℃ and the temperature is kept for 2h, the temperature is cooled to 60 ℃ along with the furnace, air cooling is carried out, the residual stress is effectively released, and the risks of deformation and cracking are reduced. The vacuum heat treatment can be completed in a vacuum environment completely or partially, and compared with the common heat treatment, the vacuum heat treatment has the characteristics of no oxidation, no decarburization, small deformation and difficult cracking, and is more suitable for the manufacture of the invention.
According to the lightweight design method of the marine supercharger rotor, a water-drop-shaped self-supporting structure suitable for metal 3D printing is adopted for inner hollowing, the area of a solid part is reduced, the total weight is reduced by 16%, residual stress can be released while the weight is reduced, and the mechanical property of parts is basically equivalent to that before optimization.
Drawings
Fig. 1 is a stripe scan diagram.
Fig. 2 is a schematic view of the block support structure of the present invention.
Fig. 3 is a structural schematic diagram of a rotor of a marine supercharger, wherein (a) is a front view, (b) is a side view, (c) is a top view, and (d) is a sectional top view.
FIG. 4 is a schematic view of the embodiment of the present invention shown in column 1.
FIG. 5 is a schematic view of the present embodiment in column 2.
FIG. 6 is a schematic diagram of a drop-shaped self-supporting structure according to the present invention, wherein (a) is a front sectional view of FIG. 1, and (b) is a front sectional view of FIG. 2.
Description of the drawings: 1-connecting rod, 2-blade, 3-drop part, 4-hollow part and 5-blade shaft belt.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
According to the invention, the blade and the connecting rod of the marine supercharger rotor are integrally formed by adopting a 3D printing technology.
The supercharger rotor adopts a 3D printing mode of a strip scanning strategy, and stress generated in the scanning and printing process is reduced.
Above-mentioned booster rotor, its axle area adopt the inside fretwork water droplet form that is fit for metal 3D to print from bearing structure, reduce work piece weight, and work piece residual stress can obtain releasing simultaneously, reduces the stress deformation in the service behavior, improves work piece manufacturing efficiency and effective life.
Example 1
According to the supercharger rotor blade and the shaft belt material thereof, the other common alloy steel is adopted upwards at any position on the connecting rod, so that the superiority of the 3D printing technology is fully exerted, and the manufacturing cost of the marine supercharger rotor is reduced.
The supercharger rotor is used for a large ship, and the 3D printing additive manufacturing method specifically comprises the following steps: three-dimensional modeling of the part; processing data; selecting raw materials; 3D printing of the part; heat treatment of the parts; and (5) post-processing of the parts.
Modeling, namely modeling by adopting Cero three-dimensional software to construct a complex curved surface and an integrated design three-dimensional graph;
the method comprises the steps of data processing, namely placing an STL file exported from the Cero three-dimensional software into data processing software Materialise Magics for adding support and layering and slicing, wherein the thickness of a slice is 0.03mm, and the thin wall of a blade needs to be supported in order to prevent part deformation;
the supporting structure is a block support, the square holes distributed on the surface of the supporting block are favorable for removing mixed powder, and the upper end surface (the contact surface with a workpiece) of the block support is added with a columnar support, so that the binding force between the support and a part shell is increased, and the rotor is prevented from deforming due to thermal stress;
selecting raw materials, namely selecting corrosion-resistant and oxidation-resistant materials for a rotor blade of a supercharger and a shaft belt of the rotor blade, and adopting another common alloy steel for any part of a connecting rod upwards;
3D printing step of parts, supercharger rotor blade and shaft belt thereof adopt a specific 3D printing process, preferably filling scanning power: 300W; contour scan power: 150W; scanning line shift: 0.03 mm;
the other parameters are respectively; filling scan speed: 1000 mm/s; filling a scanning line gap: 0.1 mm; profile scan speed: 350 mm/s; strip width: 10 mm; strip offset: -0.08 mm; rotation angle between layers: 67 °;
the other common alloy steel on the connecting rod has the following adjustment parameters: filling scanning power: 240W; contour scan power: 120W;
heat treatment of the parts, which is to perform special vacuum heat treatment on the printed parts with the vacuum degree more than 10-1And Pa, slowly raising the furnace temperature to 550 ℃, preserving heat for 0.5h, then slowly raising the temperature to 750 ℃, preserving heat for 2h, cooling to 60 ℃ along with the furnace, air cooling, effectively releasing residual stress, and reducing the risks of deformation and cracking.
Example 2
The blades and the connecting parts of the supercharger rotor, which are flushed by high-temperature fluid, are made of nickel-based materials with better high-temperature resistance and creep resistance, and the connecting rod and the other parts are made of corrosion-resistant and oxidation-resistant materials, so that the superiority of the 3D printing technology is fully exerted, and the service life of the marine supercharger rotor is greatly prolonged.
The supercharger rotor is used for a large ship, and the 3D printing additive manufacturing method specifically comprises the following steps: three-dimensional modeling of the part; processing data; selecting raw materials; 3D printing of the part; heat treatment of the parts; and (5) post-processing of the parts.
Modeling, namely modeling by adopting Cero three-dimensional software to construct a complex curved surface and an integrated design three-dimensional graph;
the method comprises the steps of data processing, namely placing an STL file exported from the Cero three-dimensional software into data processing software Materialise Magics for adding support and layering and slicing, wherein the thickness of a slice is 0.03mm, and the thin wall of a blade needs to be supported in order to prevent part deformation;
the supporting structure is a block support, the square holes distributed on the surface of the supporting block are favorable for removing mixed powder, and the upper end surface (the contact surface with a workpiece) of the block support is added with a columnar support, so that the binding force between the support and a part shell is increased, and the rotor is prevented from deforming due to thermal stress;
selecting raw materials, namely adopting a nickel-based material with better high temperature resistance and creep resistance at blades and connecting parts of a supercharger rotor, which are washed by high-temperature fluid, and adopting a corrosion-resistant anti-oxidation material at a connecting rod and the rest parts;
3D printing step of parts, supercharger rotor blade and shaft belt thereof adopt a specific 3D printing process, preferably, filling scanning power: 240W; contour scan power: 120W; scanning line shift: 0.03 mm;
the printing parameters of the connecting rod and other parts are as follows: filling scanning power: 300W; filling scan speed: 1000 mm/s; filling a scanning line gap: 0.1 mm; scanning line shift: 0.03 mm; contour scan power: 150W; profile scan speed: 350 mm/s; strip width: 10mm, ribbon offset: -0.08 mm; rotation angle between layers: 67 deg..
Heat treatment of the parts, which is to perform special vacuum heat treatment on the printed parts with the vacuum degree more than 10-1And Pa, slowly raising the furnace temperature to 550 ℃, preserving heat for 0.5h, then slowly raising the temperature to 750 ℃, preserving heat for 2h, cooling to 60 ℃ along with the furnace, air cooling, effectively releasing residual stress, and reducing the risks of deformation and cracking.
For better performance, a solid solution process may be added before vacuum heat treatment.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, such as modifications to mesh or grid lightweight designs, and the like, and shall be considered to be within the scope of the claims of the invention.
Claims (7)
1. A design method of a marine supercharger rotor based on 3D printing is characterized by comprising the following steps: adopting a 3D printing mode, forming by using a strip scanning strategy, and integrally forming the marine supercharger rotor, wherein the marine supercharger rotor comprises a connecting rod, a blade shaft belt and blades connected with the blade shaft belt; the blades are at least 12, are evenly distributed along the axis of the blade shaft band, the shaft parts of the blades and the connecting rods are coaxially and integrally designed, the connecting rods are in a step shape, and water drop-shaped hollow structures are evenly distributed on the blade shaft band;
the supercharger rotor blade shaft belt adopts an internal hollow-out water-drop-shaped self-supporting structure suitable for metal 3D printing, so that the weight of a workpiece is reduced, meanwhile, the residual stress of the workpiece can be released, the stress deformation in the use working condition is reduced, the manufacturing efficiency of the workpiece is improved, and the effective service life of the workpiece is prolonged.
2. The design method of the 3D printing-based marine supercharger rotor according to claim 1, characterized in that: comprises the following specific steps of,
the method comprises the following steps: three-dimensional modeling of parts, namely modeling a complex shape by adopting Cero three-dimensional software, and constructing a complex curved surface and an integrated design three-dimensional diagram;
step two: processing data of the parts, namely exporting an STL file from Cero three-dimensional software according to the modeling result completed in the previous step, and putting the STL file into data processing software materialism Magics for adding support and layering and slicing; the slice thickness is 0.03-0.05 mm;
step three: selecting a corrosion-resistant and oxidation-resistant material 316L;
step four: 3D printing of the part; through the laser scanning mode, the metal powder that selects in the step three melts according to the scanning strategy and takes shape, after adding the support and confirming technological parameter, carries out the section processing according to the layer thickness with the part, and different part scanning order is from left to right, from the top down direction, and the common scanning order of single part: support → part solid → part outline;
step five: heat treatment of the parts, special heat treatment at a temperature not exceeding 550 ℃;
step six: post-processing the parts, namely sequentially carrying out bracket cutting, support removing, grinding and polishing on the parts subjected to special heat treatment in the previous step, and carrying out performance detection after the processing is finished;
wherein, the wire cutting is to use a moving thin metal wire as an electrode to perform pulse spark discharge cutting forming on the part; the cutting process includes cutting with fine molybdenum wire as tool electrode, alternate forward and reverse movement of the molybdenum wire with the wire storage cylinder, feeding working liquid medium between the wire electrode and the workpiece, servo feeding the worktable in the horizontal plane according to the spark gap state and the preset control program to synthesize various curved tracks, cutting the workpiece from the substrate, and eliminating residual support in the workpiece with electric or hand tool.
3. The design method of the 3D printing-based marine supercharger rotor according to claim 1, characterized in that: in the first step, the complex shape modeling has a front surface and a side surface, and sharp angles less than 30 degrees are avoided, the roughness of the front surface is different from that of the side surface when printing is carried out, and the roughness of the side surface is greater than that of the front surface; during modeling, the position of a workpiece larger than 45 degrees is considered, the angle is larger than or equal to 45 degrees, if the part is placed in any direction, the supporting angle cannot be guaranteed to be smaller than 45 degrees, and an auxiliary supporting structure is added when modeling is needed; modeling is carried out to directly generate stl format, so that multiple format conversion is avoided; the margin of post-processing is also taken into account when modeling.
4. The design method of the 3D printing-based marine supercharger rotor according to claim 1, characterized in that: in the second step, the thickness of the slice is 0.03-0.05mm, and in order to prevent the deformation of the part, a support structure needs to be added at the thin wall of the blade, wherein the thin wall is a part with the width far smaller than the length, and the length direction of the thin wall is 10-20 times of the width direction.
5. The design method of the 3D printing-based marine supercharger rotor according to claim 4, wherein the design method comprises the following steps: the supporting structures are block supports with different shapes, and each block support is arranged according to different shapes and different placing angles of the required supporting position; the block-shaped support surface is provided with square holes which are beneficial to removing mixed powder, and the upper end surface of the block-shaped support, namely the contact surface of the block-shaped support and a workpiece, is added with a columnar support, so that the binding force between the support and a part shell is increased, and the rotor is prevented from deforming due to thermal stress.
6. The design method of the 3D printing-based marine supercharger rotor according to claim 1, characterized in that: the laser 3D printing parameters of the part are as follows: filling scanning power: 300W; filling scan speed: 1000 mm/s; filling a scanning line gap: 0.1 mm; scanning line shift: 0.03 mm; contour scan power: 150W; profile scan speed: 350 mm/s; strip width: 10 mm; strip offset: -0.08 mm; rotation angle between layers: 67 deg..
7. The design method of the 3D printing-based marine supercharger rotor according to claim 1, characterized in that: firstly, the printed part is subjected to special vacuum heat treatment, and the vacuum degree is more than 10-1And Pa, slowly raising the furnace temperature to 550 ℃, preserving heat for 0.5h, then slowly raising the temperature to 750 ℃, preserving heat for 2h, cooling to 60 ℃ along with the furnace, air cooling, effectively releasing residual stress, and reducing the risks of deformation and cracking.
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| CN115319098A (en) * | 2022-08-08 | 2022-11-11 | 冯军亮 | Manufacturing method of motor rotating shaft and motor shaft assembly manufactured by using same |
| CN116571763A (en) * | 2023-07-14 | 2023-08-11 | 北京易加三维科技有限公司 | Large thin-wall titanium alloy part printing method and system based on laser selective melting |
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| CN116571763B (en) * | 2023-07-14 | 2023-09-19 | 北京易加三维科技有限公司 | Large thin-wall titanium alloy part printing method and system based on laser selective melting |
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