CN106001569A - Metal additive preparation method for curved-surface thin shell structure - Google Patents

Metal additive preparation method for curved-surface thin shell structure Download PDF

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Publication number
CN106001569A
CN106001569A CN201610529795.4A CN201610529795A CN106001569A CN 106001569 A CN106001569 A CN 106001569A CN 201610529795 A CN201610529795 A CN 201610529795A CN 106001569 A CN106001569 A CN 106001569A
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curved
reinforcement
laser
powder
parameter
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CN106001569B (en
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顾德阳
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Sichuan Tian Yuan Additive Manufacturing Materials Co Ltd
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Sichuan Tian Yuan Additive Manufacturing Materials Co Ltd
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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
    • 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
    • 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]
    • 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
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • 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
    • B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
    • 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
    • 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
    • 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
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • 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
    • 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
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • 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
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • 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
    • B22F10/34—Process control of powder characteristics, e.g. density, oxidation or flowability
    • 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
    • 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
    • B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/248—Thermal after-treatment
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention relates to a metal additive preparation method for a curved-surface thin shell structure. The metal additive preparation method comprises the following steps: 1) carrying out curved-surface set characteristic analysis according to a curved-surface parameter equation of the curved-surface thin shell structure to obtain a laser scanning path, and determining a partition movable scanning manner; 2) determining to pre-arrange temporary reinforcing ribs on a curved-surface thin shell according to a type of the curved-surface thin shell structure; 3) carrying out selective laser melting or laser cladding to obtain a curved-surface thin shell formed part; and 4) carrying out heat treatment or fine machining treatment on the curved-surface thin shell formed part. The preparation method has the following characteristics: the working procedures of the method are relatively simple, the working efficiency is effectively increased, the deformation amount of the formed part can meet the needs of use and design, the corrosion resistance and fatigue resistance are greatly improved, the service life can be prolonged, the manufacturing cost is reduced, and the like.

Description

A kind of curved shell Rotating fields metal increases material preparation method
Technical field
The present invention relates to metal and increase material manufacturing technology field, particularly relate to a kind of curved shell Rotating fields metal and increase material preparation method.
Background technology
At present, in the processing of curved surface plate material parts, introduce hydroforming new technique, i.e. use liquid as power transmission medium with Replace the punch of rigidity or die to transmit load, make blank recline under fluid pressure effect die or punch, thus realize gold Belong to the shaping of plate material parts.But, it is only capable of for this class material of sheet material, there is no and generally solves containing curved shell Rotating fields zero The better method of the processing problems of part, can only use mach method.
3D printing technique is currently as a study hotspot technology, and it applies quite varied in terms of stamped metal part processing.So And, in stamped metal part laser direct writing, the various situation needing profile surface shell layer segment can be run into.At present, by In the light-weighted requirement of plant equipment, and the improving constantly of machining level, many producers from changing design, Introduce the various drip molding containing curved shell Rotating fields.
Curved shell version divides barrel shell, dome thin shell, double curved shell and hyperbolic paraboloid shell, hypar shell etc..Either which kind of form, For the part containing curved shell Rotating fields, needing the topmost problem solved in its forming process is exactly that irreversible deformation is asked Topic, and temperature is the highest, deforms the biggest.Thus propose one can overcome drawbacks described above and make drip molding meet use, The preparation method that design, intensity etc. require has important important research meaning.
Summary of the invention
Shape above-mentioned deficiency present in technology for prior art mean camber shell layer, it is an object of the invention to: provide A kind of curved shell Rotating fields metal increases material preparation method, and this preparation method has: method operation is relatively easy, working performance has Effect improves, and the deflection of drip molding disclosure satisfy that use, design needs, and corrosion resistance and anti-fatigue performance are greatly improved, and use Life-span can extend, and reduces the features such as manufacturing cost.
In order to achieve the above object, the present invention adopts the following technical scheme that realization:
A kind of curved shell Rotating fields metal increases material preparation method, and this preparation method comprises the steps:
1) according to the surface parameter equation of curved shell Rotating fields, carry out curved surface set feature analysis, obtain selective laser fusing or Scanning pattern during laser melting coating, determines that motion scan mode is subregion motion scan mode, manufactures forming process successively increasing material In, the technological parameter controlling laser instrument is scanned in lth layer boundary contour and each subregion, being shaped as of each subregion be square, Rectangle or circle, scan mode is saltatory or continuous way, and wherein the scan mode of saltatory is applicable at this layer whole Choose subregion farther out in region discontinuously to be scanned；The scan mode of continuous way is applicable in this layer of whole region in turn It is scanned；
2) according to the type of curved shell Rotating fields, when carrying out selective laser fusing or laser melting coating, on curved shell layer Preset interim reinforcement, by preset interim reinforcement so that when successively shaping, this curved shell layer and the most all Layer has enough intensity, and after the processing completing this drip molding, it is easy to removing, the parameter of this reinforcement includes strengthening The kind of muscle, this kind includes cylinder, cuboid or each layer chiasma type；The also parameter of reinforcement also includes the close of reinforcement The size of degree, the size of reinforcement, reinforcement and shell layer overlapped points, wherein, the density of reinforcement is by the shell layer of drip molding Construction features determines, for 5-10 times of thickness；The size of reinforcement is the 1/2-1/5 of shell layer thickness；Reinforcement and shell layer The size of overlapped points is the 1/3-1/5 of shell layer thickness；
3) when carrying out selective laser fusing or laser melting coating, following processing step should be used:
First the scanning of part contour line is formed；First: melting for selective laser, the parameter of laser instrument is: power 200-500W, printing speed is 0.05-0.1m/min, and spot diameter is 3-8mm, and overlapping rate is 10%-20%；In print procedure, The air pressure of inert protective gas is 0.1-0.5MPa；Second: for laser melting coating, the parameter of laser instrument is: power 2000-10000W, Printing speed is 50-200mm/min, and spot diameter is 10-15mm, and overlapping rate is 10%-20%；In print procedure, inertia is protected The air pressure protecting gas is 0.1-0.5MPa；
The parameter controlling laser instrument the most again moves subarea-scanning to the region in specific trellis line so that other of drip molding is real The powder particles fuse of body portion,
Preset reinforcement is scanned by the parameter the most finally controlling laser instrument so that the powder particles fuse of preset reinforcement, first: Melting for selective laser, printing speed is 0.10-0.30m/min, and other parameter is ibid；Second: for laser melting coating, prints Speed is 100-500mm/min, and other parameter is ibid；
4), after completing above-mentioned steps, curved shell drip molding is obtained；Curved shell drip molding is removed preset reinforcement, then enters Heat treatment and/or the essence machine of row drip molding add process, wherein, include that stress relief annealing processes or full annealing processes during heat treatment Or normalized treatment, wherein, carrying out treatment temperature when stress relief annealing processes and be 500-650 DEG C, the process time is 2-3h；Adopt By full annealing process or normalized treatment；Heat treatment also includes using local heat treatmet, and it makes the key position of drip molding obtain Required mechanical performance.
As the further optimization of technique scheme, described step 1) in powder be metal dust and/or alloy powder, its Middle metal dust includes the one in Fe, Ni, Co, Zn, Al, Cr, Ti；Powder uses mixed powder machine to carry out the most all by proportioning Even mixing, and mixed powder is placed in the drying baker of 100-200 DEG C carry out dry 1-1.5 hour process；To dry Composite powder after process be placed on the powder drum of 3D printer powder feeder gives over to standby；3D printer automatic powder feeding system uses coaxial Powder feeding or not coaxial lateral automatic powder feeding system；Described step 2) in selective laser fusing or during laser melting coating, use nitrogen Or argon is as protective gas.
As the further optimization of technique scheme, described step 1) in laser instrument use carbon dioxide laser or light Fibre laser.
Compared with shell layer material molding technology in prior art, a kind of curved shell Rotating fields metal of the present invention is used to increase material system Preparation Method has the advantages that
(1) use subregion motion scan mode, reduce the laser heating time of regional, it is possible to reduce thermal deformation.
(2) method using preset reinforcement, during can shaping increasing material manufacture, avoids just in forming process in time Shell Rotating fields deforms, and even cracks.
(3) for can be improved the machining accuracy of drip molding by the drip molding local heat treatmet after processing, meet design and use Requirement；Service life is extended, and corrosion resistance and anti-fatigue performance are greatly improved.
(4) operation simple and fast, working performance is high, greatly reduces maintenance cost, and preparation method is environment friendly and pollution-free, is green Manufacture method, there is suitability feature widely.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic flow sheet that the present invention a kind of curved shell Rotating fields metal increases material preparation method.
Detailed description of the invention
1 pair of one curved shell Rotating fields metal of the present invention increases material preparation method concrete steps work with specifically below in conjunction with the accompanying drawings Bright.
A kind of curved shell Rotating fields metal increases material preparation method, it is characterised in that this preparation method comprises the steps:
1) according to the surface parameter equation of curved shell Rotating fields, carry out curved surface set feature analysis, obtain selective laser fusing or Scanning pattern during laser melting coating, determines that motion scan mode is subregion motion scan mode, manufactures forming process successively increasing material In, the technological parameter controlling laser instrument is scanned in lth layer boundary contour and each subregion, being shaped as of each subregion be square, Rectangle or circle, scan mode is saltatory or continuous way, and wherein the scan mode of saltatory is applicable at this layer whole Choose subregion farther out in region discontinuously to be scanned；The scan mode of continuous way is applicable in this layer of whole region in turn It is scanned；
2) according to the type of curved shell Rotating fields, when carrying out selective laser fusing or laser melting coating, on curved shell layer Preset interim reinforcement, by preset interim reinforcement so that when successively shaping, this curved shell layer and the most all Layer has enough intensity, and after the processing completing this drip molding, it is easy to removing, the parameter of this reinforcement includes strengthening The kind of muscle, this kind includes cylinder, cuboid or each layer chiasma type；The also parameter of reinforcement also includes the close of reinforcement The size of degree, the size of reinforcement, reinforcement and shell layer overlapped points, wherein, the density of reinforcement is by the shell layer of drip molding Construction features determines, for 5-10 times of thickness；The size of reinforcement is the 1/2-1/5 of shell layer thickness；Reinforcement and shell layer The size of overlapped points is the 1/3-1/5 of shell layer thickness；
3) when carrying out selective laser fusing or laser melting coating, following processing step should be used:
First the scanning of part contour line is formed；First: melting for selective laser, the parameter of laser instrument is: power 200-500W, printing speed is 0.05-0.1m/min, and spot diameter is 3-8mm, and overlapping rate is 10%-20%；In print procedure, The air pressure of inert protective gas is 0.1-0.5MPa；Second: for laser melting coating, the parameter of laser instrument is: power 2000-10000W, Printing speed is 50-200mm/min, and spot diameter is 10-15mm, and overlapping rate is 10%-20%；In print procedure, inertia is protected The air pressure protecting gas is 0.1-0.5MPa；
The parameter controlling laser instrument the most again moves subarea-scanning to the region in specific trellis line so that other of drip molding is real The powder particles fuse of body portion,
Preset reinforcement is scanned by the parameter the most finally controlling laser instrument so that the powder particles fuse of preset reinforcement, first: Melting for selective laser, printing speed is 0.10-0.30m/min, and other parameter is ibid；Second: for laser melting coating, prints Speed is 100-500mm/min, and other parameter is ibid；
4), after completing above-mentioned steps, curved shell drip molding is obtained；Curved shell drip molding is removed preset reinforcement, then enters Heat treatment and/or the essence machine of row drip molding add process, wherein, include that stress relief annealing processes or full annealing processes during heat treatment Or normalized treatment, wherein, carrying out treatment temperature when stress relief annealing processes and be 500-650 DEG C, the process time is 2-3h；Adopt By full annealing process or normalized treatment；Heat treatment also includes using local heat treatmet, and it makes the key position of drip molding obtain Required mechanical performance.
Described step 1) in powder be metal dust and/or alloy powder, wherein metal dust include Fe, Ni, Co, Zn, One in Al, Cr, Ti；Powder uses mixed powder machine to carry out full and uniform mixing by proportioning, and is placed on by mixed powder The drying baker of 100-200 DEG C is carried out dry 1-1.5 hour and process；Composite powder after drying and processing is placed on 3D printer The powder drum of powder feeder give over to standby；3D printer automatic powder feeding system uses coaxial powder-feeding or not coaxial lateral automatic powder feeding system；Described Step 2) in selective laser fusing or during laser melting coating, use nitrogen or argon as protective gas.Described step 1) In laser instrument use carbon dioxide laser or optical fiber laser.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and apply the present invention.It is familiar with These embodiments obviously easily can be made various amendment by the personnel of art technology, and should General Principle described herein Use in other embodiments without through performing creative labour.Therefore, the invention is not restricted to embodiment here, this area skill Art personnel should be at the protection model of the present invention according to the announcement of the present invention, the improvement made without departing from scope and amendment Within enclosing.

Claims (3)

1. a curved shell Rotating fields metal increases material preparation method, it is characterised in that this preparation method comprises the steps:
1) according to the surface parameter equation of curved shell Rotating fields, carry out curved surface set feature analysis, obtain selective laser fusing or Scanning pattern during laser melting coating, determines that motion scan mode is subregion motion scan mode, manufactures forming process successively increasing material In, the technological parameter controlling laser instrument is scanned in lth layer boundary contour and each subregion, being shaped as of each subregion be square, Rectangle or circle, scan mode is saltatory or continuous way, and wherein the scan mode of saltatory is applicable at this layer whole Choose subregion farther out in region discontinuously to be scanned；The scan mode of continuous way is applicable in this layer of whole region in turn It is scanned；
2) according to the type of curved shell Rotating fields, when carrying out selective laser fusing or laser melting coating, on curved shell layer Preset interim reinforcement, by preset interim reinforcement so that when successively shaping, this curved shell layer and the most all Layer has enough intensity, and after the processing completing this drip molding, it is easy to removing, the parameter of this reinforcement includes strengthening The kind of muscle, this kind includes cylinder, cuboid or each layer chiasma type；The also parameter of reinforcement also includes the close of reinforcement The size of degree, the size of reinforcement, reinforcement and shell layer overlapped points, wherein, the density of reinforcement is by the shell layer of drip molding Construction features determines, for 5-10 times of thickness；The size of reinforcement is the 1/2-1/5 of shell layer thickness；Reinforcement and shell layer The size of overlapped points is the 1/3-1/5 of shell layer thickness；
3) when carrying out selective laser fusing or laser melting coating, following processing step should be used:
First the scanning of part contour line is formed；First: melting for selective laser, the parameter of laser instrument is: power 200-500W, printing speed is 0.05-0.1m/min, and spot diameter is 3-8mm, and overlapping rate is 10%-20%；In print procedure, The air pressure of inert protective gas is 0.1-0.5MPa；Second: for laser melting coating, the parameter of laser instrument is: power 2000-10000W, Printing speed is 50-200mm/min, and spot diameter is 10-15mm, and overlapping rate is 10%-20%；In print procedure, inertia is protected The air pressure protecting gas is 0.1-0.5MPa；
The parameter controlling laser instrument the most again moves subarea-scanning to the region in specific trellis line so that other of drip molding is real The powder particles fuse of body portion,
Preset reinforcement is scanned by the parameter the most finally controlling laser instrument so that the powder particles fuse of preset reinforcement, first: Melting for selective laser, printing speed is 0.10-0.30m/min, and other parameter is ibid；Second: for laser melting coating, prints Speed is 100-500mm/min, and other parameter is ibid；
4), after completing above-mentioned steps, curved shell drip molding is obtained；Curved shell drip molding is removed preset reinforcement, then enters Heat treatment and/or the essence machine of row drip molding add process, wherein, include that stress relief annealing processes or full annealing processes during heat treatment Or normalized treatment, wherein, carrying out treatment temperature when stress relief annealing processes and be 500-650 DEG C, the process time is 2-3h；Adopt By full annealing process or normalized treatment；Heat treatment also includes using local heat treatmet, and it makes the key position of drip molding obtain Required mechanical performance.
A kind of curved shell Rotating fields metal the most according to claim 1 increases material preparation method, it is characterised in that: described step Rapid 1) powder in is metal dust and/or alloy powder, and wherein metal dust includes Fe, Ni, Co, Zn, Al, Cr, Ti In one；Powder uses mixed powder machine to carry out full and uniform mixing by proportioning, and mixed powder is placed on 100-200 DEG C Drying baker in carry out dry 1-1.5 hour process；Composite powder after drying and processing is placed on the powder of 3D printer powder feeder Give over to standby in Tong；3D printer automatic powder feeding system uses coaxial powder-feeding or not coaxial lateral automatic powder feeding system；Described step 2) in Selective laser fusing or during laser melting coating, use nitrogen or argon as protective gas.
A kind of curved shell Rotating fields metal the most according to claim 1 increases material preparation method, it is characterised in that: described step Rapid 1) laser instrument in uses carbon dioxide laser or optical fiber laser.
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107626925A (en) * 2017-11-02 2018-01-26 上海航天精密机械研究所 A kind of laser gain material manufacture method of variable cross-section closed cell structure
CN107790720A (en) * 2017-11-21 2018-03-13 湖南顶立科技有限公司 A kind of high temperature alloy increasing material manufacturing method
CN108907190A (en) * 2018-07-25 2018-11-30 沈阳精合数控科技开发有限公司 A kind of 3D printing increasing material manufacturing method of bowl-type thin-walled parts
CN109396435A (en) * 2018-12-04 2019-03-01 陕西理工大学 A kind of aluminum alloy complex curved sheets 3D printing manufacturing method
CN110641010A (en) * 2019-09-25 2020-01-03 业成科技（成都）有限公司 Method for 3D printing of thin-shell workpiece
CN110802230A (en) * 2019-11-05 2020-02-18 上海欣冈贸易有限公司 Bridging welding method
CN111177861A (en) * 2019-12-12 2020-05-19 西安航天发动机有限公司 Light weight design method of gimbal structure suitable for additive manufacturing forming technology
CN113927151A (en) * 2021-11-02 2022-01-14 上海航天设备制造总厂有限公司 Characteristic friction stir material increase manufacturing method and equipment for reinforcing rib of thin-wall cylinder structure
CN114799215A (en) * 2022-01-19 2022-07-29 航发优材(镇江)增材制造有限公司 Method for controlling deformation of annular thin-wall part by selective laser melting forming
CN114985762A (en) * 2022-05-25 2022-09-02 合肥中科重明科技有限公司 Forming process of thin-wall spiral curved-surface AlMg10 alloy part

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CN107626925A (en) * 2017-11-02 2018-01-26 上海航天精密机械研究所 A kind of laser gain material manufacture method of variable cross-section closed cell structure
CN107790720A (en) * 2017-11-21 2018-03-13 湖南顶立科技有限公司 A kind of high temperature alloy increasing material manufacturing method
CN108907190A (en) * 2018-07-25 2018-11-30 沈阳精合数控科技开发有限公司 A kind of 3D printing increasing material manufacturing method of bowl-type thin-walled parts
CN108907190B (en) * 2018-07-25 2020-07-31 沈阳精合数控科技开发有限公司 3D printing additive manufacturing method for bowl-shaped thin-wall part
CN109396435A (en) * 2018-12-04 2019-03-01 陕西理工大学 A kind of aluminum alloy complex curved sheets 3D printing manufacturing method
CN110641010A (en) * 2019-09-25 2020-01-03 业成科技（成都）有限公司 Method for 3D printing of thin-shell workpiece
CN110802230A (en) * 2019-11-05 2020-02-18 上海欣冈贸易有限公司 Bridging welding method
CN111177861A (en) * 2019-12-12 2020-05-19 西安航天发动机有限公司 Light weight design method of gimbal structure suitable for additive manufacturing forming technology
CN111177861B (en) * 2019-12-12 2023-05-05 西安航天发动机有限公司 Constant-normal ring structure lightweight design method suitable for additive manufacturing forming technology
CN113927151A (en) * 2021-11-02 2022-01-14 上海航天设备制造总厂有限公司 Characteristic friction stir material increase manufacturing method and equipment for reinforcing rib of thin-wall cylinder structure
CN114799215A (en) * 2022-01-19 2022-07-29 航发优材(镇江)增材制造有限公司 Method for controlling deformation of annular thin-wall part by selective laser melting forming
CN114985762A (en) * 2022-05-25 2022-09-02 合肥中科重明科技有限公司 Forming process of thin-wall spiral curved-surface AlMg10 alloy part

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