CN113858607A - Gypsum supporting method for processing deep cavity shell based on 3D printing technology - Google Patents
Gypsum supporting method for processing deep cavity shell based on 3D printing technology Download PDFInfo
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- CN113858607A CN113858607A CN202010616313.5A CN202010616313A CN113858607A CN 113858607 A CN113858607 A CN 113858607A CN 202010616313 A CN202010616313 A CN 202010616313A CN 113858607 A CN113858607 A CN 113858607A
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- deep cavity
- gypsum
- supporting
- deep
- cavity
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/72—Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
- B23Q1/76—Steadies; Rests
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- 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
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
Abstract
The invention discloses a gypsum supporting method for processing a deep cavity shell based on a 3D printing technology, which adopts three-dimensional modeling software to draw a three-dimensional skeleton model drawing of a deep cavity, adopts PLA material to print out a supporting skeleton through 3D, adds fine medical gauze, fine nylon wire and/or plastic wire which are far smaller than the size of the supporting skeleton into gypsum slurry, uniformly stirs the mixture and injects the mixture into one third of the volume of the deep cavity or the supporting depth covering the bottom of the deep cavity, the supporting skeleton is placed into the deep cavity, gypsum slurry is injected into the deep cavity and dried in the shade, a gypsum slurry pouring port of the deep cavity is sealed, a workpiece is machined and then is removed and sealed, and pouring and washing are carried out until the supporting skeleton and the gypsum are taken out. The method overcomes the support defect of traditional deep cavity shell workpiece processing, utilizes the 3D printing technology, prints and manufactures the framework according to the cavity model and then pours gypsum, ensures that the deep cavity shell is supported comprehensively and firmly, and improves the processing quality of the workpiece.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a gypsum supporting method for machining a deep cavity shell based on a 3D printing technology.
Background
In the field of machining, for machining a thin-wall shell deep cavity shell workpiece, the existing industry is more advanced in that a gypsum filling method is adopted to support a cavity so as to machine the workpiece. For example, chinese patent document CN105479114A discloses an anti-deformation processing method for a thin-walled member, which fills water-soluble gypsum into an inner cavity of a workpiece for supporting, and then implements the processing operation of the workpiece. However, the method of filling the cavity with pure gypsum without any support or other auxiliary material has a certain defect, which is mainly characterized in that the deep cavity is cracked due to the large filling amount and the local surface is loosened, even if the deep cavity is filled with the water-soluble gypsum solution repeatedly and dried in the shade, the water-soluble gypsum solution is difficult to flow to the deep part of the cavity due to the different and deep shapes of the crack positions of the gypsum in the deep cavity, and thus the completely reliable adhesive support cannot be provided for the workpiece. In the process of cutting and machining the workpiece, the machined part needing to be supported locally generates vibration and shock due to incomplete and firm support, so that the machined product is unqualified.
Disclosure of Invention
The invention aims to solve the technical problem of providing a gypsum supporting method for processing a deep cavity shell based on a 3D printing technology, which overcomes the supporting defect of the traditional deep cavity shell workpiece processing, utilizes the 3D printing technology, prints and manufactures a framework according to a cavity model and then pours gypsum, ensures that the deep cavity is supported comprehensively and firmly, and improves the processing quality of the workpiece.
In order to solve the technical problem, the gypsum supporting method for processing the deep cavity shell based on the 3D printing technology comprises the following steps of:
according to a workpiece processing drawing or the shape and the size of an actual deep cavity, drawing a three-dimensional skeleton model diagram of the deep cavity by using three-dimensional modeling software, and converting the three-dimensional skeleton model diagram into a file format supported by 3D printing slicing software;
step two, according to the drawn three-dimensional skeleton model diagram, using 3D printing slicing software to export a printing program and delivering the printing program to a 3D printer to print out a support skeleton by adopting a PLA material;
step three, after stirring and mixing the water-soluble gypsum powder and water uniformly in proportion, taking part of the fine medical gauze, the fine nylon wire and/or the plastic wire which are far smaller than the size of the supporting framework, uniformly stirring the mixture in the same way, pouring the mixture into a deep cavity to be filled, and pouring the mixture into the deep cavity, wherein the pouring amount is about one third of the volume of the deep cavity or the depth of the bottom of the deep cavity to be supported;
step four, the supporting framework is properly trimmed and then slowly placed into a deep cavity needing to be supported;
step five, slowly filling the gypsum slurry which is not added with the finely-divided medical gauze, the fine short nylon wires and/or the plastic wires into the deep cavity and drying in the shade;
step six, sealing a gypsum slurry pouring opening of the deep cavity by adopting copper sheets, steel plates or thick plastic cloth, and preventing cutting fluid from flowing into or scouring the gypsum body in the deep cavity in the machining process;
step seven, machining the workpiece according to a machining process, and removing the copper sheet, the steel plate or the thick plastic cloth of the closed deep cavity after machining is finished;
and step eight, irrigating and washing the deep cavity by adopting hot water at 60 ℃ until the gypsum in the deep cavity is loosened, and then taking out the supporting framework together with the incompletely dissolved gypsum.
Furthermore, the size of a supporting framework in the three-dimensional framework model diagram is 0.5-1 mm smaller than the size of an actual deep cavity.
Further, the cross section of the spine of the support skeleton in the three-dimensional skeleton model diagram is circular and the wall thickness is not more than 1 mm.
Furthermore, waterproof silica gel or sealant is temporarily coated and adhered between the copper sheet, the steel plate or the thick plastic cloth and the gypsum slurry pouring opening of the deep cavity, so that cutting fluid is prevented from permeating during machining and cutting, and a scraper knife is used for removing during dismantling.
The method adopts the technical scheme that three-dimensional modeling software is adopted to draw a three-dimensional framework model drawing of a deep cavity, PLA material is adopted to print out a supporting framework through 3D, fine medical gauze, fine nylon wire and/or plastic wire which are far smaller than the size of the supporting framework are added into gypsum slurry and are evenly stirred and then are injected into one third of the volume of the deep cavity or cover the supporting depth of the bottom of the deep cavity, the supporting framework is placed into the deep cavity, gypsum slurry is injected into the deep cavity and is dried in the shade, a gypsum slurry pouring port of the deep cavity is sealed, a workpiece is machined, then the deep cavity is sealed, and pouring and washing are carried out until the supporting framework and the gypsum are taken out. The method overcomes the support defect of traditional deep cavity shell workpiece processing, utilizes the 3D printing technology, prints and manufactures the framework according to the cavity model and then pours gypsum, ensures that the deep cavity shell is supported comprehensively and firmly, and improves the processing quality of the workpiece.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
fig. 1 is a schematic diagram of a gypsum supporting method for processing a deep cavity shell based on a 3D printing technology.
Detailed Description
The invention relates to a gypsum supporting method for processing a deep cavity shell based on a 3D printing technology, which comprises the following steps:
according to a workpiece processing drawing or the shape and the size of an actual deep cavity, drawing a three-dimensional skeleton model diagram of the deep cavity by using three-dimensional modeling software, and converting the three-dimensional skeleton model diagram into a file format supported by 3D printing slicing software;
step two, according to the drawn three-dimensional skeleton model diagram, using 3D printing slicing software to export a printing program and delivering the printing program to a 3D printer to print out a support skeleton by adopting a PLA material;
step three, after stirring and mixing the water-soluble gypsum powder and water uniformly in proportion, taking part of the fine medical gauze, the fine nylon wire and/or the plastic wire which are far smaller than the size of the supporting framework, uniformly stirring the mixture in the same way, pouring the mixture into a deep cavity to be filled, and pouring the mixture into the deep cavity, wherein the pouring amount is about one third of the volume of the deep cavity or the depth of the bottom of the deep cavity to be supported; the addition of the fine short nylon wires and/or the plastic wires is used for increasing the tensile bonding force in the gypsum;
step four, the supporting framework is properly trimmed and then slowly placed into a deep cavity needing to be supported;
step five, slowly filling the gypsum slurry which is not added with the finely-divided medical gauze, the fine short nylon wires and/or the plastic wires into the deep cavity and drying in the shade;
step six, sealing a gypsum slurry pouring opening of the deep cavity by adopting copper sheets, steel plates or thick plastic cloth, and preventing cutting fluid from flowing into or scouring the gypsum body in the deep cavity in the machining process to dissolve or fall off the gypsum body so as to influence the supporting effect of the gypsum in the deep cavity;
step seven, machining the workpiece according to a machining process, and removing the copper sheet, the steel plate or the thick plastic cloth of the closed deep cavity after machining is finished;
and step eight, irrigating and washing the deep cavity by adopting hot water at 60 ℃ until the gypsum in the deep cavity is loosened, and then taking out the supporting framework together with the incompletely dissolved gypsum.
Preferably, the size of the supporting framework in the three-dimensional framework model diagram is 0.5-1 mm smaller than the size of the actual deep cavity. The support framework is more favorable for being placed in the deep cavity, and convenience is brought to subsequent taking out;
preferably, the cross section of the spine of the support skeleton in the three-dimensional skeleton model diagram is circular and the wall thickness is not more than 1 mm. The arrangement of the circular cross section and the wall thickness of the spine brings convenience for the breaking of the support framework in the deep cavity of some concave or special structural types.
Preferably, waterproof silica gel or sealant is temporarily coated and adhered between the copper sheet, the steel plate or the thick plastic cloth and the gypsum slurry pouring opening of the deep cavity, so that cutting fluid is prevented from permeating during machining and cutting, and a scraper knife is used for removing during dismantling.
Wherein, the water-soluble gypsum powder and the water are stirred and mixed evenly according to the proportion of 1: 1.
The practical application of the method is shown in figure 1, taking the processing of a certain supporting plate 1 as an example, a deep cavity 11 is arranged in the supporting plate 1, and the thickness between the bottom surface of the deep cavity 11 and the bottom surface of the supporting plate 1 is less than 2 mm; the conventional processing method is easy to shake in the processing process, and the processing quality of the workpiece cannot be naturally ensured under the condition that no effective attaching support exists in the deep cavity 11. In the first processing, the discovery adopts simple gypsum to support, and the gypsum is dried up to solidify the easy fracture in deep cavity 11 back, can't play the effect that the laminating supported, and has the pine point, causes the backup pad 1 bottom surface to add man-hour, and local cutting process produces and trembles, shakes suddenly, leads to the product unqualified.
The method is applied to draw a three-dimensional skeleton model drawing for the deep cavity 11 of the supporting plate 1, the PLA material is used for printing the supporting skeleton 2 through the 3D printer, gypsum slurry is poured into the deep cavity 11 according to the method and is placed into the supporting skeleton 2, a pouring opening is sealed, the supporting skeleton 2 and the gypsum slurry realize comprehensive and complete support for the deep cavity 11, no trembling and shock are generated in the cutting process of the bottom surface processing of the supporting plate 1, and the machining quality of workpieces is effectively improved.
The method can effectively overcome the defects of the original pure gypsum filling and supporting technology, can provide perfect attaching support for the original cavity shell with large filling amount and depth, solves the problems of cracking and local cavities of the existing gypsum, provides necessary conditions for high-precision cutting processing of the surface of the workpiece shell, and has wide popularization.
The method utilizes the 3D printed support framework to provide the gypsum with the same connecting structure as that of reinforcing steel bars provided with cement, and solves the problems that the water-soluble gypsum is large in crack and easy to loosen locally. Meanwhile, fine and short wires are added into the gypsum poured at the bottom of the deep cavity, so that the gypsum slurry plays a role of aggregate, and the phenomena of cracking and cavities of the gypsum slurry are avoided, thereby providing reliable support for the deep cavity shell.
Claims (4)
1. A gypsum supporting method for processing a deep cavity shell based on a 3D printing technology is characterized by comprising the following steps:
according to a workpiece processing drawing or the shape and the size of an actual deep cavity, drawing a three-dimensional skeleton model diagram of the deep cavity by using three-dimensional modeling software, and converting the three-dimensional skeleton model diagram into a file format supported by 3D printing slicing software;
step two, according to the drawn three-dimensional skeleton model diagram, using 3D printing slicing software to export a printing program and delivering the printing program to a 3D printer to print out a support skeleton by adopting a PLA material;
step three, after stirring and mixing the water-soluble gypsum powder and water uniformly in proportion, taking part of the fine medical gauze, the fine nylon wire and/or the plastic wire (aiming at increasing the tensile binding force in the gypsum) which are far smaller than the size of the supporting framework, uniformly stirring the mixture in the same way, pouring the mixture into a deep cavity to be filled, wherein the pouring amount is about one third of the volume of the deep cavity or the depth of the bottom of the deep cavity to be supported;
step four, the supporting framework is properly trimmed and then slowly placed into a deep cavity needing to be supported;
step five, slowly filling the gypsum slurry which is not added with the finely-divided medical gauze, the fine short nylon wires and/or the plastic wires into the deep cavity and drying in the shade;
step six, sealing a gypsum slurry pouring opening of the deep cavity by adopting copper sheets, steel plates or thick plastic cloth, and preventing cutting fluid from flowing into or scouring the gypsum body in the deep cavity in the machining process;
step seven, machining the workpiece according to a machining process, and removing the copper sheet, the steel plate or the thick plastic cloth of the closed deep cavity after machining is finished;
and step eight, irrigating and washing the deep cavity by adopting hot water at 60 ℃ until the gypsum in the deep cavity is loosened, and then taking out the supporting framework together with the incompletely dissolved gypsum.
2. The gypsum support method for deep cavity housing processing based on 3D printing technology according to claim 1, characterized in that: the size of a supporting framework in the three-dimensional framework model diagram is 0.5-1 mm smaller than the size of an actual deep cavity.
3. The gypsum support method for deep cavity housing processing based on 3D printing technology according to claim 1, characterized in that: the cross section of the spine of the support framework in the three-dimensional framework model diagram is circular and the wall thickness is not more than 1 mm.
4. The gypsum support method for deep cavity housing processing based on 3D printing technology according to claim 1, characterized in that: and waterproof silica gel or sealant is temporarily coated and adhered between the copper sheet, the steel plate or the thick plastic cloth and the gypsum slurry pouring port of the deep cavity, so that cutting fluid is prevented from permeating during processing and cutting, and a scraper knife is used for removing during removal.
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| CN202010616313.5A CN113858607A (en) | 2020-06-30 | 2020-06-30 | Gypsum supporting method for processing deep cavity shell based on 3D printing technology |
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| CN202010616313.5A CN113858607A (en) | 2020-06-30 | 2020-06-30 | Gypsum supporting method for processing deep cavity shell based on 3D printing technology |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060054039A1 (en) * | 2002-12-03 | 2006-03-16 | Eliahu Kritchman | Process of and apparratus for three-dimensional printing |
| CN105479114A (en) * | 2015-12-29 | 2016-04-13 | 北京无线电测量研究所 | Anti-deformation processing method of thin-walled member |
| CN106808686A (en) * | 2016-11-15 | 2017-06-09 | 杭州乐新材料科技有限公司 | A kind of 3D printing method |
| JP6338305B1 (en) * | 2017-02-20 | 2018-06-06 | 三菱重工業株式会社 | Support member, modeling model generation device, control device, and modeling method of modeling object |
| CN108396165A (en) * | 2018-03-26 | 2018-08-14 | 昆明理工大学 | A kind of three-dimensional shell ceramic skeleton-metal-base composites and preparation method thereof |
| US20180264718A1 (en) * | 2017-03-15 | 2018-09-20 | Carbon, Inc. | Constant force compression lattice |
| CN108772937A (en) * | 2018-04-28 | 2018-11-09 | 中国矿业大学 | A kind of underground cavity intelligence placement method |
| CN109365787A (en) * | 2018-11-22 | 2019-02-22 | 中国科学院合肥物质科学研究院 | A kind of negative poisson's ratio aluminium base lattice structure and preparation method thereof |
| CN111251605A (en) * | 2018-11-30 | 2020-06-09 | 鑫精合激光科技发展（北京）有限公司 | Three-dimensional printing seaming method and structure thereof |
-
2020
- 2020-06-30 CN CN202010616313.5A patent/CN113858607A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060054039A1 (en) * | 2002-12-03 | 2006-03-16 | Eliahu Kritchman | Process of and apparratus for three-dimensional printing |
| CN105479114A (en) * | 2015-12-29 | 2016-04-13 | 北京无线电测量研究所 | Anti-deformation processing method of thin-walled member |
| CN106808686A (en) * | 2016-11-15 | 2017-06-09 | 杭州乐新材料科技有限公司 | A kind of 3D printing method |
| JP6338305B1 (en) * | 2017-02-20 | 2018-06-06 | 三菱重工業株式会社 | Support member, modeling model generation device, control device, and modeling method of modeling object |
| US20180264718A1 (en) * | 2017-03-15 | 2018-09-20 | Carbon, Inc. | Constant force compression lattice |
| CN108396165A (en) * | 2018-03-26 | 2018-08-14 | 昆明理工大学 | A kind of three-dimensional shell ceramic skeleton-metal-base composites and preparation method thereof |
| CN108772937A (en) * | 2018-04-28 | 2018-11-09 | 中国矿业大学 | A kind of underground cavity intelligence placement method |
| CN109365787A (en) * | 2018-11-22 | 2019-02-22 | 中国科学院合肥物质科学研究院 | A kind of negative poisson's ratio aluminium base lattice structure and preparation method thereof |
| CN111251605A (en) * | 2018-11-30 | 2020-06-09 | 鑫精合激光科技发展（北京）有限公司 | Three-dimensional printing seaming method and structure thereof |
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