CN110756800B - Additive manufacturing method - Google Patents
Additive manufacturing method Download PDFInfo
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- CN110756800B CN110756800B CN201810835515.1A CN201810835515A CN110756800B CN 110756800 B CN110756800 B CN 110756800B CN 201810835515 A CN201810835515 A CN 201810835515A CN 110756800 B CN110756800 B CN 110756800B
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- China
- Prior art keywords
- reference block
- additive manufacturing
- block
- additive
- base plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
-
- 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
- B22F10/10—Formation of a green body
-
- 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
- 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
- B22F12/30—Platforms or substrates
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to the technical field of additive manufacturing, and discloses an additive manufacturing method, which comprises the following steps: mounting a reference block on a bottom plate; performing additive manufacturing on the top surface of the reference block; removing the reference block with the part from the bottom plate; machining the part by taking the reference block as a reference; the datum block is separated from the part. According to the additive manufacturing method, the reference block is arranged, so that the forming reference of the part can be reserved after additive manufacturing is finished, and the size and position accuracy of the part can be guaranteed during subsequent processing. The utilization rate of the additive powder, the manufacturing efficiency of the additive parts and the size precision of the parts can be further improved. The non-machined surface of the additive manufacturing part can be accurately manufactured, and therefore the part with the mixed machined surface and the additive forming surface is achieved.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing method.
Background
The additive manufacturing technology is a tool-free forming technology, is suitable for production of parts of various types and small batches, and can directly realize the production from design to product. However, limited by the development level of additive manufacturing technology, currently, in order to obtain a product meeting the target requirement, a large machining allowance needs to be reserved for the additive manufactured part, and a machining size is reserved for subsequent processes such as heat treatment, sand blasting, machining and the like. However, the parts obtained by additive manufacturing must be mechanically separated from the base plate and then machined, which causes the part reference to be lost during machining, and the dimensional and position accuracy of the parts is difficult to guarantee, thereby weakening the advantages of additive manufacturing.
Disclosure of Invention
The invention aims to provide an additive manufacturing method, which can ensure that the standard of a part obtained by additive manufacturing is not lost during subsequent processing, thereby ensuring the size and position accuracy of the part.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of additive manufacturing, comprising:
mounting a reference block on a bottom plate;
performing additive manufacturing on the top surface of the reference block;
removing the reference block with the part from the bottom plate;
machining the part by taking the reference block as a reference;
the datum block is separated from the part.
Preferably, the surface of the reference block and the bottom plate is cleaned before the reference block is mounted on the bottom plate.
Preferably, the part and the reference block are heat treated before machining the part with reference to the reference block.
Preferably, after the reference block with the parts is removed from the base plate, the parts and the reference block are heat-treated;
alternatively, the component, the reference block and the base plate are heat treated together before the reference block with the component is removed from the base plate.
Preferably, the part on the reference block is sandblasted before machining the part with reference to the reference block.
Preferably, the reference block is embedded in a groove on the top surface of the base plate, and the reference of the reference block is the same as that of the base plate.
Preferably, the material of the reference block is the same as that of the component.
Preferably, the top surface of the reference block has an area greater than the area of the bottom surface of the part, and the part is molded on the reference block.
Preferably, the top surface of the reference block has an area smaller than the area of the bottom surface of the part, and the part is molded on the reference block and the bottom plate.
Preferably, two reference blocks are provided, and the two reference blocks are respectively provided on two opposite sides of the bottom surface of the part.
The invention has the beneficial effects that:
by arranging the reference block, the forming reference of the part can be reserved after the additive manufacturing is finished, so that the size and position accuracy of the part can be guaranteed in the subsequent processing. The utilization rate of the additive powder, the manufacturing efficiency of the additive parts and the size precision of the parts can be further improved. The non-machined surface of the additive manufacturing part can be accurately manufactured, and therefore the part with the mixed machined surface and the additive forming surface is achieved.
Drawings
FIG. 1 is a schematic structural diagram of a platform-type reference block in cooperation with a base plate and a component according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a structure of a contained datum block cooperating with a base plate and a component according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of FIG. 2 with parts omitted;
FIG. 4 is a schematic view of a structure of a tab-type reference block cooperating with a base plate and a component according to an embodiment of the present invention;
fig. 5 is a schematic structural view of fig. 4 with parts omitted.
In the figure:
1. a base plate; 2. a reference block; 3. and (4) parts.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The invention provides an additive manufacturing method, which comprises the following steps:
step one, setting a reference block 2.
In this step, the material of the reference block 2 is the same as that of the part 3 to be molded in order to ensure that the reference block 2 and the part 3 are not contaminated in the subsequent cleaning, heat treatment, and the like. In order to ensure the reliability of the reference block 2, the thickness of the reference block 2 is not less than 1mm, the flatness is not higher than 0.005mm, and the precision of the pin hole is not lower than 0.01 mm.
And step two, carrying out surface cleaning on the reference block 2 and the bottom plate 1.
In this step, adopt cleaners such as acetone and rag to clear up, guarantee that bottom plate 1 and 2 surfaces of benchmark piece are clean and tidy, no foreign matter.
And step three, mounting the reference block 2 on the bottom plate 1.
In this step, the reference block 2 is embedded in the groove on the top surface of the bottom plate 1, and the reference block 2 and the bottom plate 1 are fixed by the positioning pin, so that the X, Y directions of the bottom plate 1 and the reference block 2 are unified, the Z direction of the bottom plate 1 and the reference block 2 is ensured by the size of the reference block 2, and finally the reference of the reference block 2 is the same as that of the bottom plate 1.
In this embodiment, the reference block 2 having three size structures can be selected, which are:
in a platform type, as shown in fig. 1, the area of the top surface of the reference block 2 with the size structure is larger than that of the bottom surface of the part 3, and the part 3 is integrally formed on the reference block 2.
In the embedded type, as shown in fig. 2 and 3, the area of the top surface of the reference block 2 with the size structure is smaller than that of the bottom surface of the part 3, the reference block 2 is hidden inside the bottom side of the part 3 to support the part 3, and the part 3 is molded on the reference block 2 and the bottom plate 1.
The two reference blocks 2 are respectively arranged at two opposite sides of the bottom surface of the part 3, the width of the reference block 2 is smaller than the width of the projection of the part 3 on the bottom plate 1, the two reference blocks 2 are respectively supported at the central position of the width direction of the part 3, part of the two reference blocks 2 is exposed out of the length direction of the part 3, and the part 3 is erected by the two reference blocks 2 and is formed on the reference blocks 2 and the bottom plate 1.
And step four, performing additive manufacturing on the part 3 on the top surface of the reference block 2.
In this step, the part 3 is molded by the additive manufacturing process with reference to the design size and the process margin of the part 3 with the reference block 2 as a reference.
And step five, removing the reference block 2 with the part 3 from the bottom plate 1.
And a heat treatment process is also arranged between the third step and the fourth step, so that the internal stress of the part 3 after the additive manufacturing is eliminated. Specifically, the part 3 and the reference block 2 may be subjected to heat treatment (applicable to the reference block 2 of the flat type) after the reference block 2 with the part 3 is removed from the base plate 1; alternatively, the component 3, the reference block 2 and the base plate 1 are heat treated together before the reference block 2 with the component 3 is removed from the base plate 1, and then the reference block 2 with the component 3 is removed from the base plate 1 (for the embedded and tab reference blocks 2).
During heat treatment, the part 3 and the reference block 2 (or the part 3, the reference block 2 and the base plate 1) are subjected to stress relief in a vacuum heat treatment furnace according to the heat treatment specification of the part 3.
When the part 3 is integrally formed on the reference block 2, the reference block 2 with the part 3 can be removed from the bottom plate 1 only by removing the positioning pin; when the part 3 is molded on the reference block 2 and the base plate 1, the part 3 and the base plate 1 need to be separated by wire cutting in addition to the removal of the positioning pins.
And step six, carrying out sand blasting treatment on the part 3 on the reference block 2.
In this step, the reference block 2 is protected and the part 3 is sandblasted separately to improve the mechanical properties of the surface of the part 3.
And seventhly, machining the part 3 by taking the reference block 2 as a reference.
In this step, the component 3 with the reference block 2 is mounted on a table of a numerical controller, and the fastening state is maintained, and thereafter, the component 3 is numerically controlled by using the positional reference of the reference block 2.
And step eight, separating the reference block 2 from the part 3.
In this step, the part 3 and the reference block 2 are separated by wire cutting, resulting in a single part 3.
In the additive manufacturing method, the reference block 2 is arranged, so that the forming reference of the part 3 can be reserved after additive manufacturing is finished, and the size and position accuracy of the part 3 can be ensured in subsequent processing. The utilization rate of the additive powder, the manufacturing efficiency of the additive part 3, and the dimensional accuracy of the part 3 can be further improved. Non-machined-face precision manufacturing of the additive manufactured part 3 can be achieved, and therefore a part 3 with a mixed machined face and additive formed face is achieved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A method of additive manufacturing, comprising:
installing a reference block on a bottom plate, and embedding the reference block in a groove on the top surface of the bottom plate, wherein the reference of the reference block is the same as that of the bottom plate;
performing additive manufacturing on the top surface of the reference block;
removing the reference block with the part from the bottom plate;
machining the part by taking the reference block as a reference;
the datum block is separated from the part.
2. The additive manufacturing method according to claim 1, wherein the datum block and the base plate are surface cleaned prior to mounting the datum block on the base plate.
3. The additive manufacturing method according to claim 1, wherein the part and the reference block are heat treated prior to machining the part on a reference block basis.
4. The additive manufacturing method according to claim 3, wherein the part and the reference block are heat treated after the reference block with the part is removed from the base plate;
alternatively, the component, the reference block and the base plate are heat treated together before the reference block with the component is removed from the base plate.
5. The additive manufacturing method according to claim 1, wherein the part on the reference block is grit blasted prior to machining the part on the reference block.
6. The additive manufacturing method according to claim 1, wherein a material of the reference block is the same as a material of the part.
7. The additive manufacturing method according to any one of claims 1 to 6, wherein an area of a top surface of the reference block is larger than an area of a bottom surface of the part, the part being formed on the reference block.
8. The additive manufacturing method according to any one of claims 1 to 6, wherein an area of a top surface of the reference block is smaller than an area of a bottom surface of the part, and the part is formed on the reference block and the base plate.
9. Additive manufacturing method according to any one of claims 1-6, wherein there are two reference blocks, the two reference blocks being arranged on opposite sides of the bottom surface of the part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835515.1A CN110756800B (en) | 2018-07-26 | 2018-07-26 | Additive manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835515.1A CN110756800B (en) | 2018-07-26 | 2018-07-26 | Additive manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN110756800A CN110756800A (en) | 2020-02-07 |
| CN110756800B true CN110756800B (en) | 2022-02-01 |
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| CN201810835515.1A Active CN110756800B (en) | 2018-07-26 | 2018-07-26 | Additive manufacturing method |
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| CN101637835A (en) * | 2009-09-04 | 2010-02-03 | 宝钢集团苏州冶金机械厂 | Method for machining and detecting helical gear with key way |
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| CN106030038A (en) * | 2013-12-20 | 2016-10-12 | 瑞尼斯豪公司 | Additive manufacturing apparatus and method |
| CN106623927A (en) * | 2016-12-13 | 2017-05-10 | 中核北方核燃料元件有限公司 | Nuclear power fuel assembly tube socket laser additional material forming manufacturing method |
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| CN108115132A (en) * | 2016-12-03 | 2018-06-05 | 鑫精合激光科技发展（北京）有限公司 | A kind of hook and its manufacturing method with novel wear resistant layer structure |
| CN108115133A (en) * | 2016-12-03 | 2018-06-05 | 鑫精合激光科技发展（北京）有限公司 | A kind of hook and its manufacturing method with novel wear resistant layer structure |
| CN108145159A (en) * | 2016-12-03 | 2018-06-12 | 鑫精合激光科技发展（北京）有限公司 | A kind of hook and its manufacturing method with novel wear resistant layer structure |
| CN108312519A (en) * | 2018-03-09 | 2018-07-24 | 武汉益永康医疗科技有限公司 | Quick 3D printing device and method |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101637835A (en) * | 2009-09-04 | 2010-02-03 | 宝钢集团苏州冶金机械厂 | Method for machining and detecting helical gear with key way |
| CN106030038A (en) * | 2013-12-20 | 2016-10-12 | 瑞尼斯豪公司 | Additive manufacturing apparatus and method |
| BR112016028857A2 (en) * | 2014-06-09 | 2017-08-22 | Hybrid Manufacturing Tech Limited | ? machine tool, methods for creating and inspecting an article, machine readable medium, and processing head? |
| CN104259459A (en) * | 2014-09-29 | 2015-01-07 | 飞而康快速制造科技有限责任公司 | Method for producing titanium alloy artware by adopting selective laser melting |
| CN108115132A (en) * | 2016-12-03 | 2018-06-05 | 鑫精合激光科技发展（北京）有限公司 | A kind of hook and its manufacturing method with novel wear resistant layer structure |
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| CN108312519A (en) * | 2018-03-09 | 2018-07-24 | 武汉益永康医疗科技有限公司 | Quick 3D printing device and method |
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| CN110756800A (en) | 2020-02-07 |
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