CN113814399A - Combined-support 3D printing method and support assembly - Google Patents
Combined-support 3D printing method and support assembly Download PDFInfo
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- CN113814399A CN113814399A CN202010561202.9A CN202010561202A CN113814399A CN 113814399 A CN113814399 A CN 113814399A CN 202010561202 A CN202010561202 A CN 202010561202A CN 113814399 A CN113814399 A CN 113814399A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- 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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Abstract
The invention discloses a combined supported 3D printing method and a support assembly, wherein the printing method comprises the following steps: providing a support assembly of a part to be printed, wherein the support assembly is formed by combining one or more main support pieces and a plurality of sub support pieces; coating metal powder on the surface of the supporting component, and then carrying out selective sintering and/or selective melting on the metal powder, wherein the metal powder is printed and formed layer by layer on the supporting component to obtain a formed printed part; the printing part is separated from the main support by hand or by a robot. The printing method provided by the invention is used for overcoming the defect that the traditional 3D printing method needs to repeatedly and precisely reprocess the supporting plate, and reducing a great amount of time and cost wasted by the continuously and repeatedly precise reprocessing of the supporting plate in the traditional printing process in the large-scale repeated production process.
Description
Technical Field
The invention relates to a printing method of an artificial joint in the medical field, in particular to a 3D printing method of a combined support and a support assembly.
Background
Selective laser melting or electron beam melting 3D printing technology is a common method for rapid forming of metallic materials, and complex parts can be printed layer by selective sintering or melting of metallic powders. However, during the molding of the part, the part and the powder support plate are sintered together, and after printing, the part and the support plate are separated by machining, such as spark cutting. The separated support plate must be subjected to a precise reworking to achieve a strict flatness before it can be used again.
Based on this, in the process of large-scale repeated production, the continuous and repetitive precise reprocessing of the support plates wastes a large amount of time and cost. In addition, a transition layer is required to be arranged between the printing part and the support plate, so that the transition layer needs to be cut off after the component is separated from the support plate, material waste is caused, and processing cost is increased.
Therefore, it is necessary to provide a new technical solution to solve the above problems, so as to overcome the defect that the conventional 3D printing method must repeatedly and precisely rework the support plate.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a combined support 3D printing method, which adopts the technical scheme that:
a method of modular supported 3D printing, comprising:
providing a support assembly of parts to be printed, the support assembly comprising one or more main support members and a number of sub-support members, the main and sub-support members being detachably connected;
coating metal powder on the surface of the supporting component, and then carrying out region positioning on the surface of the supporting component to obtain a selected region;
sintering and/or melting the selected area, so that the metal powder is printed and molded layer by layer on the supporting component to obtain a molded printed part;
separating the printing member from the main support.
Furthermore, a plurality of grooves are formed in the surface of the main supporting piece, the sub-supporting piece is provided with protrusions matched with the grooves, the height of each protrusion is larger than the depth of each groove, and the protrusions are accommodated in the grooves;
further, the metal powder is coated on the surface of the sub-supporting piece, and then the surface of the sub-supporting piece is scanned by laser or electron beams for area positioning to obtain a selected area, wherein the laser or electron beams are not in direct contact with the main supporting piece.
Further, the sub-support coated with the metal powder is scanned with a laser or an electron beam, and the area of the scanned area is smaller than or equal to the surface area of the protrusions on the sub-support.
Further, sintering and/or melting the selected region specifically includes:
further, sintering and/or melting the selected area through the laser or the electron beam, and printing and molding the metal powder on the sub-support layer by layer to obtain a molded printing part,
further, the molded printing part is composed of the sub-support and metal powder attached to the sub-support.
Further, separating the printing part from the main support specifically includes:
further, the formed printing component is subjected to separation forming and/or secondary finishing forming by hand or machining according to design requirements.
Further, the main supporting piece is not in direct contact with a heat source, and the main supporting piece is separated from the printing part and then repeatedly applied to a subsequent printing process;
furthermore, the material of the main supporting piece, the material of the sub supporting piece and the material of the part to be printed are different.
The invention also provides a support assembly for 3D printing, which comprises one or more main support pieces and a plurality of sub support pieces, wherein the main support pieces and the sub support pieces are detachably connected;
furthermore, the surface of the main supporting piece is provided with a groove, the sub-supporting pieces are provided with protrusions matched with the grooves, the protrusions on the sub-supporting pieces are installed in the grooves of the main supporting piece, and the plurality of sub-supporting pieces are installed on the one or more main supporting pieces.
Further, the depth of the groove is less than the thickness of the main supporting piece,
further, the surface of the main supporting piece is provided with a plurality of grooves.
Further, the shape of the groove comprises one or more combinations of circles, triangles, rectangles, pentagons, hexagons and polygons.
Further, the height of the protrusion on the sub-support is greater than the depth of the groove.
Compared with the prior art, the invention has one or more of the following beneficial effects:
1. the invention provides a 3D printing method of a combined support, which is used for overcoming the defect that a support plate needs to be repeatedly and precisely reprocessed in the traditional 3D printing method, and reducing a great deal of time and cost wasted by the continuously and repeatedly precise reprocessing of the support plate in the traditional printing process in the large-scale repeated production process;
2. in the traditional printing process, a transition layer is required to be arranged between a printing part and a support plate, so that after a part is separated from the support plate, the transition layer needs to be cut off, which not only causes waste on materials, but also increases the processing cost.
3. The height of the protrusions on the sub-supporting piece is slightly higher than the depth of the grooves, so that the main supporting piece is prevented from being in direct contact with laser or electron beams in the printing process, and the main supporting piece can be reused without reprocessing because the main supporting piece is not in direct contact with the laser or electron beams (heat source) after being separated from the sub-supporting piece;
4. the main supporting piece and the sub supporting piece can be made of the same material as the printed part or different materials from the printed part, and the material of the supporting component can be the same as or different from that of the printed part;
5. the sub-supporting piece and the printing piece can form a complete part, and can be separated and formed or finally formed through machining, whether the separation or the reprocessing is needed is finished, and the flexibility of printing, processing and forming is increased in a certain sense according to whether the design requirements are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic cross-sectional view of a main support piece of the present invention in one embodiment;
FIG. 2 is a schematic cross-sectional view of the sub-support member of the present invention mated with the main support member;
FIG. 3 is a schematic view of a state of printing using a laser scanning the surface of a sub-support;
FIG. 4 is a schematic cross-sectional view of a femoral condyle printed with a support assembly described in an embodiment of the present invention;
fig. 5 is a schematic view of a machining state in scanning machining with a laser beam or an electron beam.
Wherein, 10-main support piece, 11-groove, 20-sub support piece, 21-protrusion; 3-a shaped printing component; 4-laser; 5-a substrate; 6-processing the platform.
Detailed Description
The technical solutions of the embodiments of the present invention will be described below in detail by referring to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The gist of the present invention will be further explained below with reference to the accompanying drawings and examples.
Example (b):
the invention provides a 3D printing method with a combined support, which is used for overcoming the defect that a support plate needs to be repeatedly and precisely reprocessed in the traditional 3D printing method, and reducing a great amount of time and cost wasted by the continuously repeated precision reprocessing of the support plate in the traditional printing process in the large-scale repeated production process.
Referring to fig. 1-5, a method for 3D printing with a combined support includes:
providing a support assembly of the parts to be printed, the support assembly comprising one or more main support pieces and several sub support pieces, the main support piece 10 and the sub support piece 20 being detachably connected; in the drawings, only one main support 10 and multiple sub-supports 20 are shown, and a technician can disassemble or assemble the main support 10 and the sub-supports 20 based on the description, it should be noted that the multiple main supports 10 and the multiple sub-supports 20 are more widely used in the case of complicated shape and structure of a product to be printed.
And coating metal powder on the surface of the supporting component, and positioning the surface of the supporting component in an area to obtain a selected area, wherein the selected area can be used for carrying out shape molding on the object to be printed.
Sintering and/or melting the selected area to enable the metal powder to be printed and molded layer by layer on the supporting component to obtain a molded printing part 3, namely, the metal powder is solidified into the shape of an object to be printed;
the printing block is separated from the main support 10 and then post-processed.
In one embodiment, the surface of the main support piece 10 of the present invention is provided with a plurality of grooves 11, as shown in fig. 1, the sub-support piece 20 has a protrusion 21 corresponding to the groove 11, the height of the protrusion 21 is greater than the depth of the groove 11, the protrusion 21 is received in the groove 11, as shown in fig. 2, and further, the main support piece 10 and the sub-support piece 20 can be in point contact or surface contact connection;
further, the metal powder is coated on the surface of the sub-support member 20, and then the surface of the sub-support member 20 is scanned by a laser or an electron beam to perform area positioning, so as to obtain a selected area, the laser or the electron beam is not in direct contact with the main support member 10, so that the main support member 10 can be recycled without being processed, as shown in fig. 3 to 5.
Referring to fig. 5, which is a schematic view of a processing state in scanning processing using a laser or an electron beam, a processing stage 6 is prepared, a substrate 5 is placed on the processing stage 6, a support member coated with metal powder is placed on the substrate 5, and then the support member is scan-sintered or scan-melted using a laser.
In one embodiment, referring to fig. 3, the sub-support 20 coated with metal powder is scanned by a laser or an electron beam, the area of the scanned area is smaller than or equal to the surface area of the protrusions 21 on the sub-support 20, the size of the scanned area can be controlled to further affect the printing precision, and the area of the scanned area is smaller than or equal to the surface area of the protrusions 21 on the sub-support 20, so that the main support 10 does not directly contact with a processing heat source during the scanning printing using the laser or the electron beam, thereby ensuring that the main support 10 is not contaminated or affected during the processing, and the main support 10 can be directly recycled without processing.
In one embodiment, the present invention sinters and/or melts selected regions, specifically including:
sintering and/or melting the selected area by the laser or electron beam, and printing and molding the metal powder on the sub-support layer by layer to obtain a molded printing part 3,
further, the molded printing part 3 (see fig. 4, which may be a femoral condyle) is composed of the sub-support 20 and the metal powder attached to the sub-support 20, and the printing part and the sub-support 20 are integrated into a single body, and can be separated from the main support plate directly by hand or by a robot without machining, and the support assembly is shown in fig. 3.
In one embodiment, the processing method of the present invention may be used to perform the separation molding or the secondary finishing molding of the molded printing component 3 by hand or by machining according to design requirements.
Further, the material of the main supporting member 10, the material of the sub-supporting member 20, and the material of the member to be printed may be the same or different.
Further, the main support 10 is not in direct contact with a heat source, and the main support 10 is separated from the printing part and then repeatedly used in a subsequent printing process.
With continued reference to fig. 1-4, the present invention further provides a support assembly for 3D printing, the support assembly comprising one or more main support pieces 10 and a plurality of sub-support pieces 20, the main support pieces 10 and the sub-support pieces 20 being detachably connected;
further, the surface of the main support piece 10 is provided with grooves 11, the sub-support pieces 20 have protrusions 21 corresponding to the grooves 11, the protrusions 21 of the sub-support pieces 20 are installed in the grooves 11 of the main support piece 10, and the plurality of sub-support pieces 20 are installed on the one or more main support pieces 10.
Further, the depth of the flutes 11 is less than the thickness of the main support piece 10 to ensure that the flutes do not penetrate the main support piece 10.
Further, the surface of the main support 10 is provided with a plurality of grooves 11.
Further, the shape of the concave groove 11 includes one or more of a circle, a triangle, a rectangle, a pentagon, a hexagon, and a polygon, or any other shape, and the sub-support is a component matching with the concave groove of the main support, and the protrusion on the sub-support can match with the concave groove in any shape, such as a circle, a ring, a square, a rectangle, or other shape. It should be noted that the shapes of the groove 11 and the protrusion 21 which are not shown in the drawings are not inapplicable, and are not shown in the drawings, and any groove and protrusion which can function as a connection may be used as the shapes of the groove and the protrusion according to the present invention.
Further, the height of the protrusion 21 on the sub-support 20 is greater than the depth of the groove 11, so as to ensure that the main support does not make any direct contact with the laser or electron beam during the printing process, and after the main support is separated from the sub-support, the main support can be reused without being reworked because the main support does not make direct contact with the laser or electron beam (heat source).
The printing method of the invention utilizes the supporting component to assist in processing and forming, avoids the technical defects in the traditional processing, integrates the printing part printed by the printing method with the sub-supporting component, can not need mechanical processing, and directly separates from the main supporting plate by hands or a mechanical arm, thereby saving the processing time.
The height of the protrusion on the sub-supporting piece is slightly higher than the depth of the groove, so that the main supporting piece is not in direct contact with laser or electron beams in the printing process, and the main supporting piece can be reused without reprocessing because the main supporting piece is not in direct contact with the laser or electron beams (heat source) after being separated from the sub-supporting piece.
The main supporting piece and the sub supporting piece can be made of the same material as the printed part or different materials from the printed part, the material of the supporting component can be the same or different from the material of the printed part, the compatibility of the materials is high, the corresponding material requirement is reduced, and the cost is reduced.
The sub-supporting piece and the printing piece can form a complete part, and can be separated and formed or finally formed through machining, whether the separation or the reprocessing is needed is finished, and the flexibility of printing, processing and forming is increased in a certain sense according to whether the design requirements are met.
In conclusion, the invention provides the combined support 3D printing method, and a great amount of time and cost wasted by the continuous repetitive precision reprocessing of the support plate in the traditional printing process is reduced in the large-scale repeated production process.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.
While embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications and variations may be made therein by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A3D printing method of a combined support is characterized by comprising the following steps:
providing a support assembly of parts to be printed, the support assembly comprising one or more main support members and a number of sub-support members, the main and sub-support members being detachably connected;
coating metal powder on the surface of the supporting component, and then carrying out region positioning on the surface of the supporting component to obtain a selected region;
sintering and/or melting the selected area, so that the metal powder is printed and molded layer by layer on the supporting component to obtain a molded printed part;
separating the printing member from the main support.
2. The printing method according to claim 1,
the surface of the main supporting piece is provided with a plurality of grooves, the sub-supporting piece is provided with protrusions matched with the grooves, the height of each protrusion is larger than the depth of each groove, and the protrusions are accommodated in the grooves;
and coating the metal powder on the surface of the sub-supporting piece, and scanning the surface of the sub-supporting piece by using laser or electron beams to perform area positioning to obtain a selected area, wherein the laser or electron beams are not in direct contact with the main supporting piece.
3. The printing method according to claim 2,
scanning the sub-support coated with the metal powder with a laser or an electron beam, an area of a scanned region being less than or equal to a surface area of a protrusion on the sub-support.
4. The printing method according to claim 1,
sintering and/or melting the selected region, specifically comprising:
sintering and/or melting the selected area by the laser or electron beam, and printing and molding the metal powder on the sub-support layer by layer to obtain a molded printed part,
the molded printing part is composed of the sub-support and metal powder attached to the sub-support.
5. Printing method according to claim 1, characterized in that separating the printing means from the main support comprises in particular:
according to design requirements, the formed printing component is subjected to separation forming and/or secondary finishing forming through manual or machining.
6. The printing method according to claim 1,
the main supporting piece is not in direct contact with a heat source, and the main supporting piece is separated from the printing part and then repeatedly applied to a subsequent printing procedure;
the main supporting piece, the sub supporting piece and the part to be printed are made of different materials.
7. A support assembly for 3D printing, comprising one or more main support pieces and a number of sub support pieces, the main and sub support pieces being detachably connected;
the surface of the main supporting piece is provided with a groove, the sub-supporting pieces are provided with protrusions matched with the grooves, the protrusions on the sub-supporting pieces are installed in the grooves of the main supporting pieces, and the plurality of sub-supporting pieces are installed on the one or more main supporting pieces.
8. The support assembly of claim 7, wherein the depth of the groove is less than the thickness of the main support piece,
the surface of the main supporting piece is provided with a plurality of grooves.
9. The support assembly of claim 8, wherein the shape of the recess comprises one or more combinations of a circle, a triangle, a rectangle, a pentagon, a hexagon, and a polygon.
10. The support assembly of claim 7, wherein the height of the protrusion on the sub-support is greater than the depth of the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010561202.9A CN113814399A (en) | 2020-06-18 | 2020-06-18 | Combined-support 3D printing method and support assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010561202.9A CN113814399A (en) | 2020-06-18 | 2020-06-18 | Combined-support 3D printing method and support assembly |
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| Publication Number | Publication Date |
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| CN113814399A true CN113814399A (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010561202.9A Withdrawn CN113814399A (en) | 2020-06-18 | 2020-06-18 | Combined-support 3D printing method and support assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114632950A (en) * | 2022-03-17 | 2022-06-17 | 潍柴动力股份有限公司 | Material-increasing and material-decreasing composite manufacturing method for engine cylinder block |
-
2020
- 2020-06-18 CN CN202010561202.9A patent/CN113814399A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114632950A (en) * | 2022-03-17 | 2022-06-17 | 潍柴动力股份有限公司 | Material-increasing and material-decreasing composite manufacturing method for engine cylinder block |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20230327 Address after: 221499 Science and Technology Innovation Park A12, Xinyi Economic Development Zone, Xuzhou City, Jiangsu Province Applicant after: Jiangsu Yisong Medical Technology Co.,Ltd. Address before: 215123 biomedical industrial park, No. 218, Xinghu street, Suzhou Industrial Park, Suzhou area, China (Jiangsu) pilot Free Trade Zone, Suzhou, Jiangsu Applicant before: Suzhou Meister Medical Technology Co.,Ltd. |
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Application publication date: 20211221 |