CN110202146A - The method of isochronous printing sand mold support auxiliary increasing material manufacturing metal parts - Google Patents

The method of isochronous printing sand mold support auxiliary increasing material manufacturing metal parts Download PDF

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Publication number
CN110202146A
CN110202146A CN201910564302.4A CN201910564302A CN110202146A CN 110202146 A CN110202146 A CN 110202146A CN 201910564302 A CN201910564302 A CN 201910564302A CN 110202146 A CN110202146 A CN 110202146A
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metal
printing
metal parts
support
sand mold
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CN110202146B (en
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孙中刚
嵇书伟
陈小龙
常辉
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Nanjing Tech University
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Nanjing Tech University
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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]
    • 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
    • B22F10/40—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
    • 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
    • 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
    • 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
    • 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 belongs to increases material manufacturing technology fields, a kind of method for proposing isochronous printing sand mold support auxiliary increasing material manufacturing metal parts, it the steps include: on substrate, using the vertical direction of substrate as Print direction, the layer-by-layer contour metal parts of isochronous printing and metal support, and it successively forms and the contour sand mold of metal parts, until printing complete metal parts and metal support, and mold complete sand mold part, sand mold part after molding and the metal being arranged at intervals between sand mold part support constitute support construction, the support construction is bonded with the metal parts inner wall.Invention prevents powder feeding/wire feed printing stage because no structural support causes molten bath to be collapsed, so as to cause the defect of printing failure, meanwhile, the invention avoids extra machinings, reduce the forming cost of labyrinth metal parts, meet the market demand.

Description

The method of isochronous printing sand mold support auxiliary increasing material manufacturing metal parts
Technical field
The present invention relates to material increasing fields, specifically propose the side for sending material to print complicated metal parts in increasing material manufacturing Method.
Background technique
3D printing has been used in casting field, and common technology has: fusion sediment rapid shaping technique (FDM), light are solid Change forming technique (SLA), Selective Laser Sintering (SLS), Patternless casting manufacturing technology (PCM), based on the straight of 3D printing Connect Shell Casting Technology (DSPC), 3D inkjet printing technology (3DP).Also, 3D printing technique answering in field of metal casting technology Be concentrated mainly on model casting, sand casting at present, repair defect etc..
Sand casting is higher to design accuracy and surface quality requirements, 3D printing combination sand casting, obtained product Precision is much higher than traditional die cast.Here, 3D printing, compared with machining, molding is complicated, molding cycle is reduced, section About mold cost.The increasing material manufacturing of sand casting is existing generally to use SLS, 3DP technology.There is associated specialist scholar couple both at home and abroad to this The combination of increasing material manufacturing and sand mold printing has carried out a series of research.
Snelling et al. (Snelling D, Li Q, Meisel N, et al.Lightweight metal cellular structures fabricated via 3D printing of sand cast molds[J], Adv.Eng.Mater., 2015 (17): 923-932.) have studied 3D printing combination sand casting manufacture light weight cellular structural metal Material is molded with high specific strength, impact absorbing ability, the material of heat insulation performance；
(Zhang Lei, Wu Yongliang, Liu Tao wait application study of .3D printing sand core (type) in railway steel castings to Zhang Lei et al. [J] Special Processes of Metal Castings and non-ferrous alloy, 2017,37 (10): 1071-1074.) use 3D inkjet printing technology and selective laser Sintering technology prints railway steel castings sand sample, and uses sand casting, obtains 3DP technique cast(ing) surface compared with SLS technique casting Rough surface, but print speed is fast and cost is relatively low；
(Zhao Kaifa, the titanium alloy Rapid casting process based on SLS overlay film zircon sand sand mold study [J] titanium work to Zhao Kaifa et al. Industry progress, 2016,33 (3): 43-44) utilize SLS technology direct forming sand mould, the sand mold and type core that the method produces Manufacturing cycle is short, it is strong to form strong flexibility, forming stability, and can promote the shape complexity of heavy castings.
Geng's pendant et al. (application [J] Chinese Foundry equipment and technology of the honest and just pendant simple analysis 3D printing technique in cast form, 2016 (1): 8-9.) using 3D printing technique production shift fork prototype, it carries out sand casting moulding and simultaneously casts, obtained after demoulding Shift fork material object parts.Compared to the method for traditional sand casting, surface quality of continuous castings is good, and cost is also reduced.
But meanwhile Laser Melting Deposition technology (powder feeding printing) because laser optical spot diameter it is larger, there are printing precision not Enough, molding thermal stress is larger, causes to form the poor problem of Complex Parts ability.And electric arc increases material manufacturing technology (wire feed printing) exists Molten bath is equally collapsed because not having supporting role under the action of the big heat of electric arc.
The above research carries out sand casting etc. just for the forming of first 3D printing sand mold again, but does not exist really The complex parts of Laser Melting Deposition (powder feeding printing) and electric arc increases material manufacturing technology (wire feed printing) are improved in terms of increasing material manufacturing Forming ability, therefore this problem is urgently to be resolved.
Summary of the invention
It is an object of that present invention to provide a kind of methods that isochronous printing sand mold supports auxiliary increasing material manufacturing metal parts, it is intended to By forming sand mold, powder feeding/wire feed printing metal parts and support construction manually, sand is dissolved using lytic agent after printing Type, and it is machined removal support, it is finally reached powder feeding/wire feed printing labyrinth metal parts purpose.
Above-mentioned purpose of the invention realizes that dependent claims are to select else or have by the technical characteristic of independent claims The mode of benefit develops the technical characteristic of independent claims.
To reach above-mentioned purpose, the present invention proposes a kind of side of isochronous printing sand mold support auxiliary increasing material manufacturing metal parts Method includes the following steps: on substrate, using the vertical direction of substrate as Print direction, the contour metal zero of layer-by-layer isochronous printing Part and metal support, and successively molding and the contour sand mold of metal parts, until printing complete metal parts and metal branch Support, and complete sand mold part is molded, sand mold part after molding and the metal being arranged at intervals between sand mold part support constitute support Structure, the support construction are bonded with the metal parts inner wall.
Further, successively molding is with the contour sand mold of metal parts by using injector laying type emery dust end and metal The print surface of part is contour, reuses scraper plate and is compacted solidify by molding sand powder and strikes off realization.
Further, molding sand powder is the mixture of molding sand and binder.
Further, metal parts and metal support are printed using laser gain material manufacturing technology synchronous powder feeding system.
Further, metal parts and metal support are printed using electric arc increases material manufacturing technology synchronous wire feed.
Further, layer-by-layer synchronous powder feeding system prints contour metal parts and when metal supports, and single layer printing height is 0.6 ~0.8mm, laser power are 900~1500w, and scanning speed is 480~720mm/min, sweep span 1.7mm.
Further, layer-by-layer synchronous wire feed prints contour metal parts and when metal supports, single layer printing height for 1~ 1.5mm, wire feed printing use CMT welding technique, wire feed rate 7.5-8.5m/min；Speed of welding 0.006-0.01m/s；It is dry to stretch Long 8mm；Throughput 25L/min.
Further, sand mold part material include it is following any one: silica, aluminium oxide, silicon nitride, graphite, metal Part and metal support material are identical, including it is following any one: stainless steel, titanium alloy, copper alloy, aluminium alloy.
Further, in the support construction that sand mold part and metal support are constituted, the quantity of sand mold part is not less than 1, and every A metal is arranged every 2~10mm to support, one metal is set preferably by 4~6mm and is supported.
Further, after printing, sand mold part removes in such a way that lytic agent dissolves, and metal support and substrate pass through Mach mode removes.
The method of isochronous printing sand mold support auxiliary increasing material manufacturing metal parts of the invention, is particularly advantageous in that It is laid with sand mold, powder feeding/wire feed printing metal parts, the synchronous progress of metal support using spray head, powder feeding/wire feed prints complicated knot The metal parts and metal support structure of structure during printing herein, prevent powder feeding/wire feed printing stage because of no structural support Molten bath is caused to be collapsed, so as to cause the defect of printing failure.But it by molding sand mold and is compacted play branch as support mode Support the effect in molten bath.After metal parts molding, using the binder in lytic agent dissolution sand mold part, a small number of branch need to be only removed Support, avoids extra machining, improves powder feeding/wire feed printing part complexity, reduces labyrinth metal zero The forming cost of part, meets the market demand.
It should be appreciated that as long as aforementioned concepts and all combinations additionally conceived described in greater detail below are at this It can be viewed as a part of the subject matter of the disclosure in the case that the design of sample is not conflicting.In addition, required guarantor All combinations of the theme of shield are considered as a part of the subject matter of the disclosure.
Can be more fully appreciated from the following description in conjunction with attached drawing present invention teach that the foregoing and other aspects, reality Apply example and feature.The features and/or benefits of other additional aspects such as illustrative embodiments of the invention will be below Description in it is obvious, or learnt in practice by the specific embodiment instructed according to the present invention.
Detailed description of the invention
Attached drawing is not intended to drawn to scale.In the accompanying drawings, cycle and taking corresponding operation in each figure uses text in figure It is labeled.For clarity, in each figure, not each step part is described.Now, example will be passed through and joined Attached drawing is examined to describe the embodiment of various aspects of the invention, in which:
Fig. 1 is increasing material manufacturing powder feeding of the invention/wire feed printing metal parts and the flow chart for being laid with sand mold.
Fig. 2 is the embodiment of the present invention one and two increasing material manufacturing powder feeding of embodiment printing metal parts and the process for being laid with sand mold Diagrammatic cross-section.
Fig. 3 is three increasing material manufacturing powder feeding of embodiment of the present invention printing metal parts and the process section signal for being laid with sand mold Figure.
Fig. 4 is four increasing material manufacturing powder feeding of embodiment of the present invention printing metal parts and the process section signal for being laid with sand mold Figure.
Fig. 5 is five increasing material manufacturing wire feed of embodiment of the present invention printing metal parts and the process section signal for being laid with sand mold Figure.
Specific embodiment
In order to better understand the technical content of the present invention, special to lift specific embodiment and institute's accompanying drawings is cooperated to be described as follows.
Various aspects with reference to the accompanying drawings to describe the present invention in the disclosure, shown in the drawings of the embodiment of many explanations. It is not intended to cover all aspects of the invention for embodiment of the disclosure.It should be appreciated that a variety of designs and reality presented hereinbefore Those of apply example, and describe in more detail below design and embodiment can in many ways in any one come it is real It applies, this is because conception and embodiment disclosed in this invention are not limited to any embodiment.In addition, disclosed by the invention one A little aspects can be used alone, or otherwise any appropriately combined use with disclosed by the invention.
A kind of method according to the present invention for disclosing isochronous printing sand mold support auxiliary increasing material manufacturing metal parts, by same Step printing metal parts, metal support and the method for successively forming sand mold, when the first floor prints, first print metal parts and metal branch Support structure, then laying binder and the mixed molding sand powder composition sand mold of molding sand are filled manually, and use scraper plate by sand Type compacting is solidified and is struck off using scraper plate, and the remaining molding sand powder on brush cleaning metal parts surface is then used.With substrate Vertical direction is Print direction, is printed layer by layer, until complete metal parts and metal support are printed with increases material manufacturing technology, And mold complete sand mold part.After printing terminates, sand mold part is dissolved using lytic agent, then is machined the extra gold of removal Belong to support and substrate obtains required metal parts.
As shown in connection with fig. 1, as exemplary implementation of the invention, aforementioned specific implementation process includes:
Step 1, that molding sand and binder are mixed to form molding sand powder is spare.
Step 2, using laser gain material manufacturing technology, synchronous powder feeding system/wire feed printing metal parts and metal support, in the first floor When printing, contour using metal powder isochronous printing first metal parts and metal support structure, alternatively, increasing material using electric arc Manufacturing technology, synchronous wire feed print metal parts and metal support, in first floor printing, use metal welding wire isochronous printing first Contour metal parts and metal support structure, then molding sand powder is contour with print surface using injector laying, it reuses Molding sand powder is compacted solidify and strike off by scraper plate, and uses the remaining molding sand powder on brush cleaning metal parts surface.
Step 3 repeats step 2, until printing complete metal parts and metal support, and molds complete sand mold Part.
Step 4, printing after, using lytic agent by sand mold part after molding binder dissolve, thus removal at Sand mold part after type.
Step 5 is successively removed metal support and substrate using machining, obtains required metal parts.
Pass through isochronous printing metal parts and metal support by the above process as a result, and successively molds complete sand Type part finally removes sand mold part using the binder in lytic agent dissolution sand mold part, and is machined and removes metal support and substrate, A possibility that realizing increasing material manufacturing powder feeding/wire feed printing parts with complex structures.
For the ease of better understanding, below with reference to specific following 5 kinds of increasing material examples, invention is further explained, In embodiment, metal support and sand mold part can choose alloy powder/alloy wire of pairing, molding sand material include such as steel and The combination of the combination of the combination of the combination of silica, titanium alloy and aluminium oxide, copper alloy and silicon nitride, aluminium alloy and graphite. But alloy powder/alloy wire, molding sand material type are not limited to cited various alloy powder/alloy wires in embodiment With molding sand material ingredient, and the content of present invention includes (but not limited to) the material combination collocation in embodiment.
[embodiment one]
(1), silica and 1.8%~2wt% clay binder are mixed to form molding sand powder in proportion.
(2), when carrying out the first floor (first layer) printing, on substrate, powder feeding prints 301 contour stainless steel metal parts It is supported with metal, then molding sand powder is contour with print surface using injector laying, reuses scraper plate and be compacted molding sand powder Solidify and strike off, and uses the remaining molding sand powder on brush cleaning metal parts surface.Single layer printing height is 0.7mm, laser Power is 900W, scanning speed 500mm/min, sweep span 1.7mm.
(3), duplicate printing prints the second layer, third layer ... n-th layer, until printing complete 301 stainless steel metal Part and metal support, and mold complete silica sand mold part.
(4), silica sand mold part is dissolved using alcohol.
(5), metal support and substrate are successively removed and obtains required metal parts using machining.
Printing shaping process is shown in that Fig. 2 (a)~Fig. 2 (d), single layer print procedure are Fig. 2 (a)~Fig. 2 (c), and print result is Fig. 2 (d).
This implements specific technological parameter can be according to the difference of molding sand material and metal species using corresponding technological parameter.
[embodiment two]
(1), aluminium oxide and 1.8%~2wt% clay bond are mixed to form molding sand powder in proportion.
(2), when carrying out the first floor (first layer) printing, on substrate, first powder feeding prints contour TC4 titanium alloy metal zero Part and metal support structure, it is then that molding sand powder is contour with print surface using injector laying, scraper plate is reused by molding sand Powder compacting solidifies and strikes off, and uses the remaining molding sand powder on brush cleaning metal parts surface.Single layer prints height 0.7mm, laser power 1000W, scanning speed 560mm/min, scanning element is away from for 1.7mm.
(3), duplicate printing prints the second layer, third layer ... n-th layer, until printing complete TC4 titanium alloy metal Part and metal support, and mold complete aluminium oxide sand mold part.
(4), aluminum oxide sand type part is dissolved using alcohol.
(5), metal support and substrate are successively removed using machining, obtains required metal parts.
Printing shaping process is shown in that Fig. 2 (a)~Fig. 2 (d), single layer print procedure are Fig. 2 (a)~Fig. 2 (c), and print result is Fig. 2 (d).
This implements specific technological parameter can be according to the difference of molding sand material and metal species using corresponding technological parameter.
[embodiment three]
(1), silicon nitride and 1.8%~2wt% sodium silicate binder are mixed to form molding sand powder in proportion.
(2), when carrying out the first floor (first layer) printing, on substrate, first powder feeding prints contour CuSn10 copper alloy gold Belong to part and metal support structure, then that molding sand powder is contour with print surface using injector laying, reusing scraper plate will The compacting of molding sand powder solidifies and strikes off, and uses the remaining molding sand powder on brush cleaning metal parts surface.Single layer printing height For 0.6mm, laser power 1100W, scanning speed 600mm/min, scanning element is away from for 1.7mm.
(3), duplicate printing prints the second layer, third layer ... n-th layer, until printing complete CuSn10 copper alloy Metal parts and metal support, and mold complete silicon nitride sand mold part.
(4), silicon nitride sand mold part is dissolved using alcohol.
(5), metal support and substrate are successively removed using machining, obtains required metal parts.
Printing shaping process is shown in that Fig. 3 (a)~Fig. 2 (d), single layer print procedure are Fig. 3 (a)~Fig. 2 (c), and print result is Fig. 3 (d).
This implements specific technological parameter can be according to the difference of molding sand material and metal species using corresponding technological parameter.
[example IV]
(1), graphite and 1.8%~2wt% phenolic resin adhesive are mixed to form molding sand powder in proportion.
(2), when carrying out the first floor (first layer) printing, on substrate, first powder feeding prints contour AlSi10Mg aluminium alloy Metal parts and metal support structure, it is then that molding sand powder is contour with print surface using injector laying, reuse scraper plate Molding sand powder is compacted solidify and strike off, and uses the remaining molding sand powder on brush cleaning metal parts surface.Single layer printing is high Degree is 0.8mm, laser power 1500W, scanning speed 720mm/min, and scanning element is away from for 1.7mm.
(3), duplicate printing prints the second layer, third layer ... n-th layer, closes until printing complete AlSi10Mg aluminium Golden metal parts and metal support, and mold complete silica sand mold part.
(4), silica sand mold part is dissolved using alcohol.
(5), metal support and substrate are successively removed using machining, obtains required metal parts.
Printing shaping process is shown in that Fig. 4 (a)~Fig. 4 (d), single layer print procedure are Fig. 4 (a)~Fig. 2 (c), and print result is Fig. 4 (d).
This implements specific technological parameter can be according to the difference of molding sand material and metal species using corresponding technological parameter.
[embodiment five]
(1), zirconium oxide and 1.8%~2wt% furane resins binder are mixed to form molding sand powder in proportion.
(2), when carrying out the first floor (first layer) printing, on substrate, first wire feed prints contour TC4 titanium alloy metal zero Part and metal support structure, it is then that molding sand powder is contour with print surface using injector laying, scraper plate is reused by molding sand Powder compacting solidifies and strikes off, and uses the remaining molding sand powder on brush cleaning metal parts surface.Single layer prints height 1mm, CMT printing technology parameter are as follows: wire feed rate 7.5m/min；Speed of welding 0.006m/s；Stem elongation 8mm；Throughput 25L/ min；
(3), duplicate printing prints the second layer, third layer ... n-th layer, until printing complete TC4 titanium alloy metal Part and metal support, and mold complete zirconium oxide sand mold part.
(4), oxidation zircon sand type part is dissolved using alcohol.
(5), metal support and substrate are successively removed using machining, obtains required metal parts.
Printing shaping process is shown in that Fig. 5 (a)~Fig. 5 (d), single layer print procedure are Fig. 5 (a)~Fig. 5 (c), and print result is Fig. 5 (d).
This implements specific technological parameter can be according to the difference of molding sand material and metal species using corresponding technological parameter. In material increasing field, Laser Melting Deposition (powder feeding printing) and electric arc increases material manufacturing technology (wire feed printing) unlike laser because selecting It is that molten bath plays the role of setting off that area's fusing (powdering printing), which has powder, is easy to cause molten bath to collapse when forming complex parts, from And parts with complex structures molding failure.In the embodiment stated before this invention, lining can be played by introducing molding sand in print procedure The effect in delivery powder/wire feed printing molten bath is unlikely to the molten bath in print procedure and collapses that printing is caused to fail, while passing through printing Metal support reduces thermal stress in powder feeding/wire feed print procedure and improves powder feeding/wire feed printing labyrinth to molding influence The ability of part.
Although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention.Skill belonging to the present invention Has usually intellectual in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Cause This, the scope of protection of the present invention is defined by those of the claims.

Claims (10)

1. a kind of method of isochronous printing sand mold support auxiliary increasing material manufacturing metal parts, which comprises the steps of: On substrate, using the vertical direction of substrate as Print direction, the contour metal parts of layer-by-layer isochronous printing and metal support, and by Formable layer and the contour sand mold of metal parts until printing complete metal parts and metal support, and mold complete sand Type part, sand mold part after molding and the metal being arranged at intervals between sand mold part support constitute support construction, the support construction It is bonded with the metal parts inner wall.
2. method as described in claim 1, which is characterized in that successively molding with the contour sand mold of metal parts by using The print surface of injector laying type emery dust end and metal parts is contour, reuses scraper plate and is compacted solidify and strike off by molding sand powder It realizes.
3. method according to claim 2, which is characterized in that molding sand powder is the mixture of molding sand and binder.
4. the method as described in claim 1, which is characterized in that metal parts is synchronous using increases material manufacturing technology with metal support Powder feeding printing.
5. the method as described in claim 1, which is characterized in that metal parts is synchronous using increases material manufacturing technology with metal support Wire feed printing.
6. the method as described in claim 1, which is characterized in that layer-by-layer powder feeding isochronous printing contour metal parts and metal branch Support, single layer printing height is 0.6~0.8mm.
7. the method as described in claim 1, which is characterized in that layer-by-layer wire feed isochronous printing contour metal parts and metal branch Support, single layer printing height is 1~1.5mm.
8. the method as described in claim 1, which is characterized in that sand mold part material include it is following any one: silica, oxygen Change aluminium, silicon nitride, graphite, metal parts and metal support material include it is following any one: stainless steel, titanium alloy, copper alloy, Aluminium alloy.
9. the method as described in claim 1, which is characterized in that in the support construction of sand mold part and metal support composition, sand mold The quantity of part is not less than 1, and a metal is arranged at interval of 2~10mm and supports, and a metal branch is arranged preferably by 4~6mm Support.
10. the method as described in claim 1, which is characterized in that after further including printing, in such a way that lytic agent dissolves The step of removing sand mold part and metal support is removed by mach mode and the step of substrate.
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CN112692301A (en) * 2020-12-14 2021-04-23 佛山宇仁智能科技有限公司 Manufacturing method for metal additive manufacturing forming inner cavity
WO2023025209A1 (en) * 2021-08-27 2023-03-02 深圳市创必得科技有限公司 Equal-height support structure generation method and apparatus, electronic device, and storage medium

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WO2023025209A1 (en) * 2021-08-27 2023-03-02 深圳市创必得科技有限公司 Equal-height support structure generation method and apparatus, electronic device, and storage medium

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