CN113927893A - Additive manufacturing method for improving defects of part supporting surface - Google Patents
Additive manufacturing method for improving defects of part supporting surface Download PDFInfo
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- CN113927893A CN113927893A CN202010610854.7A CN202010610854A CN113927893A CN 113927893 A CN113927893 A CN 113927893A CN 202010610854 A CN202010610854 A CN 202010610854A CN 113927893 A CN113927893 A CN 113927893A
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 130
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 239000000654 additive Substances 0.000 title claims abstract description 35
- 230000000996 additive effect Effects 0.000 title claims abstract description 35
- 230000007547 defect Effects 0.000 title claims abstract description 31
- 238000007639 printing Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims description 54
- 238000000034 method Methods 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
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- 239000007787 solid Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/245—Platforms or substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/379—Handling of additively manufactured objects, e.g. using robots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
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- 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
- B33Y80/00—Products made by additive manufacturing
Abstract
The invention discloses an additive manufacturing method for improving defects of a supporting surface of a part, which specifically comprises the following steps of S1: establishing a model of a part to be molded; s2: determining the model shape of the supporting component according to the shape of the part; s3: dividing the supporting part into a first supporting part and a second supporting part, wherein the first supporting part is directly contacted with the part, and the second supporting part is connected to the side wall of the first supporting part, which is far away from the part; s4: generating an additive manufacturing path according to the model of the part and the model shape of the support component, and printing the molded part and the support component; s5: the support member is peeled from the part. The additive manufacturing method can reduce the stress between the part and the supporting component under the condition of ensuring that the part is stably supported, and ensures that the supporting surface of the part is relatively flat after the supporting component is stripped, thereby ensuring the forming precision of the part.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing method for improving defects of a supporting surface of a part.
Background
The machining principle of the additive manufacturing technology is based on the idea of discrete accumulation molding, the CAD model is directly driven to discretize the three-dimensional digital model of the part, and then layer-by-layer machining is carried out according to the idea of digital integration so as to rapidly complete the manufacturing and machining mode of the three-dimensional solid part with any complex shape. Fused Deposition Modeling (FDM) is a method for heating and fusing various hot-melt filament materials, and is one of additive manufacturing techniques. In the additive manufacturing process, hot melt material is extruded out of the nozzle and then fused with the previous layer. After deposition of one layer is completed, the table is lowered by one layer thickness in predetermined increments and melt blown deposition is continued until the entire solid part is completed.
In practice, some parts need to be printed in an inclined state so that the performance requirements can be met. However, in the prior art operation, a supporting part needs to be designed on the back of the part to be printed, and because the part needs to be stripped after being formed, and the cost factor is considered, the supporting part and the part respectively adopt two different materials A and B. After waiting to print the shaping, the endogenous stress of the two that the material difference of support component and part can lead to increases to make the deformation of the faying face of part and support component, after the support component was peeled off, the defect that unevenness and deflection are too big has appeared in the holding surface of part, and this defect can make the shaping precision of part lower, and make the part comparatively complicated for the later stage processing who remedies this defect, promoted the manufacturing cost of part.
Disclosure of Invention
The invention aims to provide an additive manufacturing method for improving the defects of a supporting surface of a part, which can reduce the stress between the part and a supporting component under the condition of ensuring that the part is stably supported, and ensure that the supporting surface of the part is relatively flat after the supporting component is stripped, thereby ensuring the forming precision of the part.
To achieve the above technical effects, the present embodiment provides an additive manufacturing method for improving defects of a supporting surface of a part, including:
s1: establishing a model of a part to be molded;
s2: determining a model shape of the support component according to the shape of the part;
s3: dividing the support part into a first support part and a second support part, wherein the first support part is directly contacted with the support surface of the part, and the second support part is connected to the side wall of the first support part, which is far away from the part;
s4: generating an additive manufacturing path according to a model of the part and a model shape of the support component, and printing and molding the part and the support component;
s5: peeling the support member from the part; wherein:
the material for printing the second support and the material for printing the part are first materials, the material for printing the first support is second materials, and the thermal expansion coefficients of the first materials and the second materials are not equal.
In some embodiments, the first support member includes a plurality of abutting portions and a plurality of flat portions, the abutting portions are disposed at intervals, one end of each abutting portion abuts against the component, the other end of each abutting portion is connected to the flat portion, and one end of the flat portion, which is away from the abutting portion, is connected to the second support member.
In some alternative embodiments, the thickness of each of the abutments is equal to the thickness of the printed sheet during printing of the part.
In some alternative embodiments, the side of the planar portion facing the part is a first plane, and the first plane is arranged in parallel with the supporting surface of the part.
In some alternative embodiments, the distance between the first plane and the support surface of the part is 0.5mm to 1.5 mm.
In some alternative embodiments, a side of the planar portion facing away from the part is a second plane, and the second plane is parallel to the supporting surface of the part.
In some alternative embodiments, the distance between the second plane and the support surface of the part is 3mm to 5 mm.
In some optional embodiments, after step S5, the method further includes: s6: and carrying out surface treatment on the supporting surface of the part.
In some alternative embodiments, the surface treatment comprises cleaning, deburring and grinding steps.
In some optional embodiments, after step S6, the method further includes: s7: and carrying out flatness test on the supporting surface of the part.
The additive manufacturing method for improving the defects of the supporting surface of the part of the embodiment comprises the steps that the supporting part integrally formed with the part in the printing process is divided into the first supporting piece different from the material of the part and the second supporting piece same as the material of the part, the stress between the part and the supporting part is reduced under the condition that the part is stably supported, so that the deformation of the supporting surface of the part is reduced, the possibility that the supporting surface of the part has large surface flaws is reduced, the supporting surface of the part is smoother after the supporting part is peeled off, and the forming precision of the part is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic step diagram of an additive manufacturing method for improving defects of a supporting surface of a part according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a component manufactured by the additive manufacturing method according to the embodiment of the invention.
Reference numerals:
1. a part; 11. a support surface;
2. a support member; 21. a first support member; 211. a stopping part; 212. a planar portion; 22. a second support member.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following describes specific steps of the additive manufacturing method for improving the defects of the supporting surface of the part according to the embodiment of the invention with reference to fig. 1.
The additive manufacturing method for improving the defects of the supporting surface of the part comprises the following steps:
s1: establishing a model of a part 1 to be molded;
s2: determining the model shape of the supporting part 2 according to the shape of the part 1;
s3: dividing the support part 2 into a first support 21 and a second support 22, wherein the first support 21 is in direct contact with the part 1, and the second support 22 is connected to a side wall of the first support 21 facing away from the part 1;
s4: generating an additive manufacturing path according to the model of the part 1 and the model shape of the support part 2, and printing the molded part 1 and the support part 2;
s5: peeling the support member 2 from the part 1; wherein:
the material of the second support 22 and the material of the printed part 1 are a first material, the material of the first support 21 is a second material, and the coefficients of thermal expansion of the first material and the second material are not equal.
First, when printing a specific geometry or printing using a specific placement angle, the supporting surface 11 of the component 1 that is in contact with the supporting member 2 is likely to be deformed or have surface defects. The presence of such deformations and defects, after many experiments and analyses, is believed to be responsible for such defects because the two materials (part 1 and support member 2) possess different coefficients of thermal expansion, which then causes the volumetric error between part 1 and support member 2 to accumulate as the overall print volume increases.
It can be understood that in the additive manufacturing method of the embodiment, the supporting component 2 integrally formed with the part 1 during the printing process is divided into the first supporting component 21 made of a different material from the part 1 and the second supporting component 22 made of the same material as the part 1, and the first supporting component 21 is in direct contact with the supporting surface 11 of the part 1, so that the supporting component 2 can be easily peeled off from the part 1 after the printing is completed. The second supporting member 22 can reduce deformation caused by the difference in material between the supporting member 2 and the component 1. Specifically, when the entire material of the support member 2 is different from the material of the part 1, the volume error between the part 1 and the support member 2 is accumulated as the entire printing amount increases. In the embodiment, one part of the supporting part 2 is made of a different material from the part 1, and the other part of the supporting part 2 is made of a different material from the part 1, so that the volume error of the part 1 and the supporting part 2 caused by different thermal expansion coefficients of the two materials is reduced, the internal stress between the part 1 and the supporting part 2 is reduced, the deformation amount of the supporting surface 11 of the part 1 is reduced, and the possibility of larger surface defects of the supporting surface 11 of the part 1 is reduced.
In the additive manufacturing method for improving the defect of the supporting surface of the part of the embodiment, the supporting part 2 integrally formed with the part 1 in the printing process is divided into the first supporting part 21 made of a material different from that of the part 1 and the second supporting part 22 made of a material identical to that of the part 1, so that the stress between the part 1 and the supporting part 2 is reduced under the condition that the part 1 is stably supported, the deformation amount of the supporting surface 11 of the part 1 is reduced, the possibility that the supporting surface 11 of the part 1 has large surface flaws is reduced, the supporting surface 11 of the part 1 is relatively flat after the supporting part 2 is peeled off, and the forming precision of the part 1 is improved.
In some embodiments, the first support 21 includes a plurality of stopping portions 211 and a plurality of plane portions 212, the stopping portions 211 are spaced apart from each other, one end of each stopping portion 211 is stopped on the component 1, the other end of each stopping portion 211 is connected to the corresponding plane portion 212, and one end of each plane portion 212, which is away from the corresponding stopping portion 211, is connected to the second support 22. It will be understood that the larger the contact area between the first support 21 and the supporting surface 11 of the part 1, the more disadvantageous the peeling of the supporting member 2 in the subsequent process, and the possibility of deformation and defects of the supporting surface 11 of the part 1 may be increased. In this embodiment, the first supporting member 21 is connected to the part 1 through the abutting portions 211 arranged at a plurality of intervals, so that the contact area between the first supporting member 21 and the part 1 can be reduced on the premise that the first supporting member 21 can stably support the part 1, thereby facilitating the peeling of the supporting member 2 from the part 1 after the printing is completed, improving the surface quality of the supporting surface 11 of the part 1, and ensuring the forming precision of the whole part 1.
In some alternative embodiments, the thickness of each abutment 211 is equal to the thickness of the printing sheet during printing of the part 1. Thus, the abutting portion 211 of the supporting part 1 can be formed easily, thereby improving printing efficiency.
In some alternative embodiments, the side of the planar portion 212 facing the part 1 is a first plane, which is arranged parallel to the support surface 11 of the part 1. It can be understood that the first plane is parallel to the supporting surface 11 of the component 1, so that the component 1 can be stably supported by the plurality of abutting portions 211, and the forming of the component 1 is ensured.
In some alternative embodiments, the distance between the first plane and the support face 11 of the element 1 is between 0.5mm and 1.5 mm. It can be understood that the length of the first plane and the supporting surface 11 of the part 1 is equal to the length of the stopping portion 211, and that an excessively large or excessively small length of the stopping portion 211 may reduce the supporting effect of the whole supporting component 2 on the part 1. In the embodiment, the length of the stopping portion 211 is controlled to be 0.5mm-1.5mm, so that the supporting function of the supporting component 2 on the part 1 can be better ensured.
It should be added here that in other embodiments of the present invention, if the supporting surface 11 of the part 1 is an arc surface, the side of the plane part 212 facing the part 1 is an arc surface similar to the supporting surface 11. That is, in other embodiments of the present invention, the side of the flat portion 212 facing the part 1 is formed into a flat or arc surface similar in shape to the support surface 11 of the part 1.
In some alternative embodiments, the side of the planar portion 212 facing away from the component 1 is a second plane, which is arranged parallel to the support surface 11 of the component 1. It can be understood that, the side of the plane portion 212 departing from the part 1 is the second plane, on one hand, it is guaranteed that the plane portion 212 and the second support member 22 are in surface contact, and the stability of the first support member 21 is guaranteed, so that the stable support of the part 1 by the first support member 21 is guaranteed, and on the other hand, the side of the plane portion 212 departing from the part 1 is formed into a plane to facilitate the printing path planning of the whole support component 2, so that the integrated forming printing of the part 1 and the support component 2 is facilitated.
In alternative embodiments the distance between the second plane and the support surface 11 of the part 1 is 3mm-5 mm. It can be understood that, the distance between the second plane and the supporting surface 11 of the part 1 is approximately equal to the thickness of the first supporting member 21, and too small thickness of the first supporting member 21 reduces the support of the supporting member 2 to the part 1, but too large thickness of the first supporting member 21 increases adverse effect of the first supporting member 21 to the part 1, and in this embodiment, the distance between the second plane and the supporting surface 11 of the part 1 is 3mm to 5mm, which can ensure the supporting function of the supporting member 2 to the part 1, ensure stable forming of the part 1, control adverse effect of the first supporting member 21 to the part 1, reduce internal stress between the part 1 and the supporting member 2, and reduce deformation of the supporting surface 11 of the part 1.
Of course, in the embodiment of the present invention, the thickness of the first supporting member 21 can be selected comprehensively according to various parameters such as the shape, the material, and the printing precision of the component 1, and is not limited to the value range of the embodiment.
In some optional embodiments, after step S5, the method further includes: s6: the support surface 11 of the component 1 is surface treated. Therefore, the support surface 11 can be ensured to be smooth and have fewer flaws after the part 1 is manufactured.
In some alternative embodiments, the surface treatment includes cleaning, deburring, and grinding steps. Of course, the specific steps of the surface treatment can be adjusted according to actual needs, and are not limited to the steps of cleaning, deburring, polishing, and the like in the embodiment.
In some optional embodiments, after step S6, the method further includes: s7: the support surface 11 of the part 1 is subjected to a flatness test. Therefore, the part 1 which is qualified in the test is a good product and can be used, and the part which is unqualified in the test is a waste product and cannot be used.
It should be added here that in other embodiments of the present invention, the test of the supporting surface 11 of the component 1 may be selected according to practical application, and is not limited to the flatness test of the embodiment.
Example (b):
as shown in fig. 2, the part 1 to be molded in this embodiment is a mechanical property test piece, the mechanical property test piece is a dumbbell-shaped sheet structure, the mechanical property test piece is printed and molded in a 45-degree inclined state, and the bottom of the mechanical property test piece forms the support part 2 at the same time during printing.
The specific manufacturing process is as follows:
the method comprises the steps of firstly, establishing a model of a part 1 to be molded, setting the part 1 to be printed and molded in an inclined state at an angle of 45 degrees, and setting a material adopted by the part 1 to be made as a first material;
secondly, preliminarily designing a supporting part 2, designing the supporting part 2 at the bottom of the part 1, designing the supporting part 2 to be triangular, enabling a supporting surface 11 of the part 1 to be in contact with the supporting part 2, enabling the part 1 to serve as a model structure, and assisting to support the integrally printed and formed supporting part 2 to serve as a supporting structure in the process of printing the part 1;
thirdly, deepening the designed supporting part 2, wherein the supporting part 2 is divided into two parts, the part contacting the part 1 is a first supporting part 21, the first supporting part 21 comprises a butting part 211 which forms multipoint contact with the supporting surface 11 of the part 1, the material of the first supporting part 21 is set to be a second material, one end of the first supporting part 21, which is far away from the part 1, is designed to be a second supporting part 22, the material of the second supporting part 22 is a first material and is designed to be a right triangle, the part 1, the first supporting part 21 and the second supporting part 22 form a sandwich state of the first material, the second material and the first material, and the thickness of the first supporting part 21 is half of the thickness of the part 1;
fourthly, setting the first supporting piece 21 to further comprise a first side surface which is 1mm away from the supporting surface 11 of the part 1, and ensuring that the connection relationship between the first supporting piece 21 and the second supporting piece 22 is tight adhesion;
fifthly, generating an additive manufacturing path according to the model of the part 1 and the model shape of the support part 2, and processing and molding by using additive manufacturing equipment;
sixthly, separating the part 1 from the supporting part 2 by manual or mechanical treatment after molding, removing the supporting part 2, preliminarily cleaning and polishing the part 1;
and seventhly, processing the finished part 1, performing surface test and mechanical property test, and taking the part 1 as a part 1 available for molding after the test is qualified.
The additive manufacturing method for improving the defects of the supporting surface of the part has the following advantages:
firstly, in the embodiment, through structural reconstruction of the material of the supporting part 2 and material selection according to the reason of defect generation, the generation of internal stress caused by the inconsistency of the thermal expansion coefficients of the two materials is reduced, and the stress deformation between the materials of the supporting part 2 and the part 1 is reduced, so that the warping deformation of the part 1 is reduced, and the surface quality and the forming precision of the part 1 are improved;
secondly, in the embodiment, through parameter control in the printing process, the support part 2 is prevented from influencing the surface of the part 1 as much as possible, so that the smoothness and the contact point are improved, the surface of the printed part 1 is smooth and clean, and the influence caused by subsequent machining is reduced.
In the description herein, references to the description of "some embodiments," "other embodiments," etc., 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 do not necessarily 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.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. An additive manufacturing method for improving defects of a supporting surface of a part, comprising the following steps:
s1: establishing a model of a part (1) to be molded;
s2: determining a model shape of the support member (2) from the shape of the part (1);
s3: dividing the support part (2) into a first support (21) and a second support (22), wherein the first support (21) is in direct contact with the support surface (11) of the part (1), and the second support (22) is connected to the side wall of the first support (21) facing away from the part (1);
s4: generating an additive manufacturing path according to a model of the part (1) and a model shape of the support part (2), and printing and molding the part (1) and the support part (2);
s5: peeling the support member (2) from the part (1); wherein:
the material of the second support (22) and the material of the part (1) are printed by a first material, the material of the first support (21) is printed by a second material, and the coefficients of thermal expansion of the first material and the second material are not equal.
2. The additive manufacturing method for improving the defect of the supporting surface of the part according to claim 1, wherein the first supporting member (21) comprises a plurality of abutting portions (211) and a plurality of plane portions (212), the abutting portions (211) are arranged at intervals, one end of each abutting portion (211) abuts against the part (1), the other end of each abutting portion (211) is connected with the corresponding plane portion (212), and one end of each plane portion (212), which is far away from the abutting portion (211), is connected with the second supporting member (22).
3. The additive manufacturing method for improving the defect of the supporting surface of the part as claimed in claim 2, wherein the thickness of each stopping part (211) is equal to the thickness of a printing sheet layer in the process of printing the part (1).
4. The additive manufacturing method for improving the defect of the supporting surface of the part according to claim 2, wherein the side surface of the planar portion (212) facing the part (1) is a first plane, and the first plane is arranged in parallel with the supporting surface (11) of the part (1).
5. The additive manufacturing method for improving part bearing surface defects according to claim 4, wherein the distance between the first plane and the bearing surface (11) of the part (1) is 0.5mm-1.5 mm.
6. Additive manufacturing method for improving the defects of the support surface of a part according to claim 2, wherein the side of the planar portion (212) facing away from the part (1) is a second plane, which is arranged parallel to the support surface (11) of the part (1).
7. The additive manufacturing method for improving part bearing surface defects according to claim 6, wherein the distance between the second plane and the bearing surface (11) of the part (1) is 3mm-5 mm.
8. The additive manufacturing method for improving part support surface defects according to any one of claims 1 to 7, further comprising, after step S5:
s6: -surface treating the support surface (11) of the part (1).
9. The additive manufacturing method for improving part support surface defects of claim 8 wherein the surface treatment comprises the steps of cleaning, deburring and grinding.
10. The additive manufacturing method for improving part support surface defects according to claim 8, further comprising, after step S6:
s7: carrying out flatness test on the supporting surface (11) of the part (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010610854.7A CN113927893A (en) | 2020-06-29 | 2020-06-29 | Additive manufacturing method for improving defects of part supporting surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010610854.7A CN113927893A (en) | 2020-06-29 | 2020-06-29 | Additive manufacturing method for improving defects of part supporting surface |
Publications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116921700A (en) * | 2023-09-15 | 2023-10-24 | 四川工程职业技术学院 | Laser selective melting forming anti-deformation method for high-temperature alloy |
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| CN105643943A (en) * | 2016-03-31 | 2016-06-08 | 周宏志 | Generating method and generating system for support of additive manufacturing |
| CN106738874A (en) * | 2016-11-24 | 2017-05-31 | 南京航空航天大学 | A kind of method of quick removal 3D printing support |
| US20190270254A1 (en) * | 2016-12-02 | 2019-09-05 | Markforged, Inc. | Sinterable separation material in additive manufacturing |
| CN111391328A (en) * | 2019-01-02 | 2020-07-10 | 严铜 | Three-dimensional modeling method for easy stripping of support |
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| CN105643943A (en) * | 2016-03-31 | 2016-06-08 | 周宏志 | Generating method and generating system for support of additive manufacturing |
| CN106738874A (en) * | 2016-11-24 | 2017-05-31 | 南京航空航天大学 | A kind of method of quick removal 3D printing support |
| US20190270254A1 (en) * | 2016-12-02 | 2019-09-05 | Markforged, Inc. | Sinterable separation material in additive manufacturing |
| CN111391328A (en) * | 2019-01-02 | 2020-07-10 | 严铜 | Three-dimensional modeling method for easy stripping of support |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116921700A (en) * | 2023-09-15 | 2023-10-24 | 四川工程职业技术学院 | Laser selective melting forming anti-deformation method for high-temperature alloy |
| CN116921700B (en) * | 2023-09-15 | 2023-12-08 | 四川工程职业技术学院 | Laser selective melting forming anti-deformation method for high-temperature alloy |
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