CN114986872B - Multi-degree-of-freedom additive manufacturing printing method for helmet - Google Patents
Multi-degree-of-freedom additive manufacturing printing method for helmet Download PDFInfo
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- 238000010586 diagram Methods 0.000 description 3
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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
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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
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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]
-
- 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
- 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
- B29C64/386—Data acquisition or data processing for additive manufacturing
-
- 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
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- 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
- B29C64/40—Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
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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
- 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
- B33Y50/00—Data acquisition or data processing for 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/10—Additive manufacturing, e.g. 3D printing
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
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- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Helmets And Other Head Coverings (AREA)
Abstract
The invention provides a multi-degree-of-freedom additive manufacturing printing method for a helmet, which comprises the steps of firstly printing a helmet supporting mold by adopting water-soluble resin based on the inner surface of a target helmet; carrying out equidistant offset layering on the curved surface of the target helmet model according to the thickness of the characteristic layer from the inner surface to the outer surface; based on the integrity of the curved surface layer, the substrate and the bulge are taken as segmentation targets, and the segmentation is performed by traversing from inside to outside region by region to store slice information; performing configuration treatment of inward-contracting wall thickness on all the protrusion areas after traversing and dividing; based on the filling parameter setting, obtaining filling information of each layer of the curved surface of the target workpiece series; the printing device with multiple degrees of freedom is arranged on the supporting die along the path, and layer-by-layer filling is carried out to finish target helmet printing; and finally, putting the helmet and the supporting mold into a water tank together, and dissolving the mold to obtain the final target helmet part. The method provides a new method for realizing the additive manufacturing of the helmet part with the complex curved surface structure.
Description
Technical Field
The invention belongs to the technical field of advanced manufacturing, and particularly relates to a multi-degree-of-freedom additive manufacturing printing method for a helmet.
Background
Common forming processes of helmets mainly comprise hand lay-up die forming, three-dimensional weaving forming and winding forming. The hand lay-up die pressing forming is a typical process for producing helmets, and the forming is restricted by metal dies, has single type and is not easy to replace; three-dimensional weaving forming mainly faces military bulletproof helmets, and improves continuity of fabrics compared with hand lay-up forming by weaving a penetration binding angle interlocking fabric; the winding process is divided into three winding processes of dry method, wet method and semi-dry method, mainly the prepreg is accurately wound on a rotating mold core at high speed according to a preset path under the control of tension, and demolding is carried out after curing, but the method is not suitable for manufacturing a part with a concave surface, and the shape of a formed helmet is limited. The fixed mold thus constrains the shape of the helmet and, in combination with performance requirements, limits its formation.
As a structure with a complex curved surface, the helmet is a new mainstream forming idea in additive manufacturing. The method comprises the steps of slicing a target helmet part model in a curved surface layering manner, obtaining an overall curved surface filling path of the helmet according to filling setting of each layer, introducing a multi-degree-of-freedom mechanical arm, and freely printing and filling high-performance fiber reinforced thermoplastic resin based pre-impregnated composite wire material according to the path, so that high-performance forming of the complex curved surface helmet can be realized.
Disclosure of Invention
In order to solve the problems, the invention discloses a multi-degree-of-freedom additive manufacturing printing method for a helmet, which is based on a complex curved surface layering method and aims to improve the multidirectional constraint of the traditional helmet forming process on the shape and performance of the helmet and finally realize the high-quality complex curved surface forming.
A multi-degree-of-freedom additive manufacturing printing method for a helmet comprises the following steps:
step 1: extracting shape features of the target helmet model, including feature information of inner and outer surfaces, sidelines and points;
and 2, step: setting a characteristic layer thickness t0 and a wall thickness coefficient k, selecting the inner surface of a helmet model, calling a numerical control program, carrying out equidistant offset layering on a target workpiece from the inner surface to the outer surface by a value t0 to obtain a series of curved surface layer sets, and recording information of each layer in the thickness direction of the model;
and step 3: according to the integrity of each curved surface layer, based on the dividing principle of 'basal layer + protruding layer', roughly dividing the model, traversing the protruding part, further refining and dividing the protruding part, and finally realizing the division of the whole model area;
and 4, step 4: filling configuration processing is carried out on the protrusion layer, the inner reduction wall thickness T = k × T0, and protrusion filling thickness and slice information of each area are obtained;
and 5: selecting an outer surface, calling a numerical control program, and generating model wall thickness curved surface offset layered slice information by combining a wall thickness value;
step 6: setting the diameter of a nozzle, a filling angle, a filling interval and selecting a filling mode;
and 7: and (3) selecting a model bottom side line, clicking a selection starting point, setting a model base filling starting point, and planning the path layer by layer according to the parameter setting in the step (6) according to the filling principle of 'base layer sequential filling → protrusion layer sequential filling → outer wall sequential filling', until the whole printing path information of the target helmet is obtained.
And 8: and the multi-degree-of-freedom printing equipment performs layer-by-layer filling printing on the target helmet supporting mould according to the printing path information until the target helmet printing is completed.
Furthermore, according to the inner surface of the target helmet part model, a supporting mold needs to be designed, a soluble resin material is selected, and the helmet supporting mold is printed and prepared on the basis of an FDM (fused deposition modeling) process, wherein the material can be water-soluble resin 3D printing consumables such as PVA (polyvinyl alcohol), eSoluble, aquaSys 120 and the like;
furthermore, the target helmet printing material is a common thermoplastic plastic wire material, which can be PLA, ABS, nylon and other materials, or a fiber reinforced resin matrix prepreg composite wire material taking the common thermoplastic plastic wire material as a matrix, which can be a short/continuous carbon fiber reinforced composite wire material and a short/continuous glass fiber reinforced composite wire material;
further, the helmet support mold has two forming modes: (1) the method can be realized by assembling double printing heads through multi-degree-of-freedom printing equipment, wherein one printing head is used for conventionally printing a supporting mold, and the other printing head is used for curved surface printing of a helmet main body; (2) after printing is finished by the single FDM printing equipment, the single FDM printing equipment is installed on a printing table of the multi-degree-of-freedom printing equipment;
furthermore, the printing equipment is a 6-axis mechanical arm printer, and the position and the posture state of a printing head of the printing equipment always meet the condition that the central line of a nozzle is vertical to the path direction;
furthermore, each layer of filling path parameters can be independently set according to the information of each curved surface layer obtained after the curved surface of the target helmet model is sliced, so that materials of each layer are arranged in a staggered mode, and the effect of weaving reinforcement is achieved;
furthermore, after the target helmet is printed, the target helmet and the internal helmet mold are taken down from the printing table support, and the target helmet and the internal helmet mold are placed in a normal-temperature water tank until the support mold is dissolved, so that the final target helmet part is obtained.
Further, the filling mode is that each layer is individually set to be one of straight filling, zigzag filling or zigzag filling.
The invention has the beneficial effects that:
1. the printing method provided by the invention is based on a multi-degree-of-freedom additive manufacturing method for a helmet aiming at a complex curved surface structural workpiece; firstly, printing a helmet supporting mold by adopting water-soluble resin based on the inner surface of a target helmet; then, carrying out equidistant offset layering on the curved surface of the target helmet model according to the thickness of the characteristic layer from the inner surface to the outer surface; secondly, based on the integrity of the curved surface layer, traversing and dividing the substrate and the protrusion from inside to outside region by region to store slice information;
2. performing configuration treatment of inward-contracting wall thickness on all the protrusion areas after traversing and dividing; based on the filling parameter setting, obtaining filling information of each layer of the curved surface of the target workpiece series; the printing device with multiple degrees of freedom is arranged on the supporting die along the path, and layer-by-layer filling is carried out to finish target helmet printing; and finally, putting the helmet and the supporting mold into a water tank together, and dissolving the mold to obtain the final target helmet workpiece.
3. The method provides a new method for realizing the additive manufacturing of the helmet part with the complex curved surface structure.
Drawings
Fig. 1 is a schematic view of a target helmet, a support mold, and a printing station of the present invention.
FIG. 2 is a schematic diagram of the equidistant offset layering steps of the present invention.
FIG. 3 is a schematic diagram of a step of dividing the traversal region according to the present invention.
FIG. 4 is a schematic view of the steps of the protrusion filling configuration of the present invention.
FIG. 5 is a schematic diagram of the process of the present invention for zonal printing (1) -sequential filling of substrate, (2) sequential filling of protrusion layer, (3) -sequential filling of outer wall).
Reference numerals
Wherein 1 — a target headgear article; 2-helmet support mould; 3-printing platform base.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The multi-degree-of-freedom additive manufacturing printing method for the helmet comprises the following steps of:
1) Determining a target helmet model, wherein the thickness of the target helmet model is 4.8mm, extracting the shape characteristics of the target helmet model, including the characteristic information of an inner surface, an outer surface, a side line and a point, establishing a helmet support mold model according to the inner surface of the helmet model, printing a water-soluble support mold by adopting an eSoluble material, and installing the water-soluble support mold on a 6-axis printing platform base;
2) Setting the thickness of a characteristic layer to be 0.6mm and the wall thickness coefficient to be 3, selecting the inner surface of a helmet model, carrying out path editing processing based on an NX software NC module, realizing equidistant offset layering of a target workpiece from the inner surface to the outer surface by 0.6mm, obtaining a series of curved surface layer sets (total 8 layers), and recording information of each layer in the thickness direction of the model;
3) According to the integrity of each curved surface layer, based on a 'basal layer + protruding layer' segmentation principle, roughly segmenting the model, traversing the protruding part, further refining and segmenting the protruding part, and finally realizing the segmentation of the whole model area to obtain a set of each basal layer area and each protruding layer area;
4) Filling configuration treatment is carried out on the protrusion layer area, the inner reduction wall thickness is 1.8mm =3 x 0.6mm, and protrusion filling thickness and slice information (5 layers) of each area are obtained;
5) Selecting an outer surface, performing path editing processing based on an NX software NC module, and generating slice information of 3 layers of model wall thickness curved surface offset by combining wall thickness values;
6) The helmet printing material is a 3K continuous carbon fiber reinforced PLA composite prepreg wire with the diameter of 0.8mm, the diameter of a nozzle is set to be 1.0mm, the filling angle is set to be 45 degrees, the filling distance is set to be 0.8mm, the filling mode is 'zigzag filling', and the relative filling transformation angle of each curved surface layer is 90 degrees (namely the filling angle: first layer 45 °, second layer-45 °, third layer 45 ° …);
7) Selecting a model bottom sideline, clicking a starting point, setting a model base filling starting point, carrying out layer-by-layer path planning according to the parameter setting of the step 6) according to the filling principle of 'base layer sequential filling → protrusion layer sequential filling → outer wall sequential filling', until the target helmet overall printing path code is obtained, converting the position and posture state of the printing head so as to always meet the condition that the central line of the nozzle is vertical to the path direction, and generating a final printing code of 6-axis printing equipment;
8) The multi-degree-of-freedom printing equipment performs layer-by-layer filling printing on the target helmet supporting mould according to the printing codes until the target helmet is printed;
9) Taking down the target helmet and the supporting die from the printing platform base, placing the target helmet in a water tank until the die is hydrolyzed, taking out the target helmet, and finishing printing.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.
Claims (5)
1. A multi-degree-of-freedom additive manufacturing printing method for a helmet is characterized by comprising the following steps of:
step 1: extracting shape features of the target helmet model, including feature information of inner and outer surfaces, a sideline and a point;
and 2, step: setting a characteristic layer thickness t0 and a wall thickness coefficient k, selecting the inner surface of a helmet model, calling a numerical control program, carrying out equidistant offset layering on a target workpiece from the inner surface to the outer surface according to the value t0 to obtain a series of curved surface layer sets, and recording information of each layer in the thickness direction of the model;
and step 3: according to the integrality of each curved surface layer, based on the principle of dividing the substrate layer and the protruding layer, roughly dividing the model, traversing the protruding part, further refining and dividing the protruding part, and finally realizing the area division of the whole model;
and 4, step 4: filling configuration processing is carried out on the protrusion layer, the inner reduction wall thickness T = k × T0, and protrusion filling thickness and slice information of each area are obtained;
and 5: selecting an outer surface, calling a numerical control program, and generating model wall thickness curved surface offset layered slice information by combining a wall thickness value;
step 6: setting the diameter of a nozzle, a filling angle, a filling interval and selecting a filling mode;
and 7: selecting a model bottom sideline, clicking a selection starting point, setting a model base filling starting point, and performing layer-by-layer path planning according to the parameter setting in the step 6 according to the filling principle of base layer sequential filling → protrusion layer sequential filling → outer wall sequential filling until the target helmet overall printing path information is obtained;
and 8: the multi-degree-of-freedom printing equipment performs layer-by-layer filling printing on the target helmet supporting mould according to the printing path information until the target helmet printing is completed; designing a helmet supporting mold according to the inner surface of a target helmet part model, and selecting a soluble resin material; the helmet support die has two forming modes, one mode is realized by assembling double printing heads by adopting multi-degree-of-freedom printing equipment, wherein one printing head is used for conventionally printing the support die, and the other printing head is used for printing the helmet main body on a curved surface; the other type is that after printing is finished by adopting the single FDM printing equipment, the single FDM printing equipment is arranged on a printing table of the multi-degree-of-freedom printing equipment; the target helmet printing material adopts thermoplastic plastic wires or fiber reinforced resin matrix prepreg composite wires taking the thermoplastic plastic wires as a matrix.
2. The multi-degree-of-freedom additive manufacturing printing method for the helmet as claimed in claim 1, wherein after the target helmet is printed, the target helmet is taken off from the printing table support together with the helmet mold, and is kept in a normal temperature water tank until the supporting mold is dissolved, so that the target helmet part is obtained.
3. The multi-degree-of-freedom additive manufacturing printing method for the helmet as claimed in claim 1, wherein the printing device is a six-axis mechanical arm printer, and the pose state of a printing head of the six-axis mechanical arm printer always satisfies that the central line of the nozzle is perpendicular to the path direction.
4. The multi-degree-of-freedom additive manufacturing printing method for the helmet as claimed in claim 1, wherein parameters of each layer of filling paths of information of each curved surface layer obtained after the curved surface of the target helmet model is sliced are independently set, so that materials of each layer are arranged in a staggered manner, and a weaving reinforcement effect is achieved.
5. The multi-degree-of-freedom additive manufacturing printing method for helmets according to claim 1, wherein the filling manner is one of straight filling, zigzag filling or zigzag filling, which is set for each layer individually.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210684578.8A CN114986872B (en) | 2022-06-17 | 2022-06-17 | Multi-degree-of-freedom additive manufacturing printing method for helmet |
| PCT/CN2022/107548 WO2023240747A1 (en) | 2022-06-17 | 2022-07-23 | Multi-degree-of-freedom additive manufacturing based printing method for helmet |
| NL2034928A NL2034928B1 (en) | 2022-06-17 | 2023-05-26 | Method for manufacturing a helmet by using a multi-degree-of-freedom additive printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210684578.8A CN114986872B (en) | 2022-06-17 | 2022-06-17 | Multi-degree-of-freedom additive manufacturing printing method for helmet |
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| Publication Number | Publication Date |
|---|---|
| CN114986872A CN114986872A (en) | 2022-09-02 |
| CN114986872B true CN114986872B (en) | 2023-03-21 |
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| CN202210684578.8A Active CN114986872B (en) | 2022-06-17 | 2022-06-17 | Multi-degree-of-freedom additive manufacturing printing method for helmet |
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| Country | Link |
|---|---|
| CN (1) | CN114986872B (en) |
| NL (1) | NL2034928B1 (en) |
| WO (1) | WO2023240747A1 (en) |
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| CN116373305B (en) * | 2023-01-05 | 2024-04-02 | 南京航空航天大学 | Space curved surface printing path planning method based on equidistant discrete |
| CN116352018B (en) * | 2023-02-09 | 2024-02-02 | 南京航空航天大学 | Gradient self-adaptive printing shape control method for multi-material composite sand mold |
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