CN112371918A - High-strength printing mode for sand mold - Google Patents
High-strength printing mode for sand mold Download PDFInfo
- Publication number
- CN112371918A CN112371918A CN202011265633.7A CN202011265633A CN112371918A CN 112371918 A CN112371918 A CN 112371918A CN 202011265633 A CN202011265633 A CN 202011265633A CN 112371918 A CN112371918 A CN 112371918A
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- Prior art keywords
- printing
- sand
- sand mold
- printer
- head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Composite Materials (AREA)
- Structural Engineering (AREA)
Abstract
The invention discloses a high-intensity printing method for a sand mold, which comprises the following steps: s1, establishing a three-dimensional model, and importing three-dimensional data into layer cutting software of a printing machine system; s2, cutting the three-dimensional data into layers with the thickness of 0.3mm by slicing software, converting control signals of each layer, and transmitting the signals to a 3D printer; S3.3D, spreading powder layer by a scraper of a printer, and adhering sand by spraying an adhesive from a printing head of a 3D printer; s4, adjusting the jetting frequency of the printing head in S3 through digital control, so that the resin amount jetted by the printing head in unit area is increased compared with that jetted by the former setting; s5, controlling the ejection quantity of the printing head in the S3, and increasing the strength of printing the sand mold part; s6, after the machine printing is finished, standing the sample in a forming box, and taking out the sample for testing. Through the mode, the strength of the printing sand core can be improved, so that the core breaking condition is avoided under the pouring condition, the surface of the casting is smooth, and the poured casting meets the requirement of oil pressure.
Description
Technical Field
The invention relates to the technical field of control valve body casting, in particular to a high-strength printing mode for a sand mold.
Background
The additive manufacturing is widely applied to commercial activities, and meanwhile, great influence is generated on our lives, compared with the traditional processing technology, the additive manufacturing solves many difficulties of traditional manufacturing, the development of the industry and the innovation of the technology are promoted, as shown in figure 1, a multi-way valve control valve body of certain aviation mechanical equipment is complex in oil circuit, and high requirements are provided for a printed sand mold due to the fact that the multi-way valve control valve body is made of cast iron.
Disclosure of Invention
The invention mainly solves the technical problem of providing a high-strength printing mode for a sand mold, which can improve the strength of a printing sand core, so that the core breaking condition is avoided under the condition of pouring, the surface of a casting is smooth, and the poured casting meets the requirement of oil pressure.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a sand mould high strength printing mode, this kind of sand mould high strength printing mode includes following step:
s1, establishing a three-dimensional model, importing three-dimensional data into layer cutting software of a printing machine system, and cutting layers by the layer cutting software;
s2, cutting the three-dimensional data into layers with the thickness of 0.3mm by slicing software, converting control signals of each layer, and transmitting the signals to a 3D printer;
s3, starting printing, spreading powder layer by a scraper of the 3D printer, spraying a binder by a printing head of the 3D printer to bond sand, moving a workbench downwards, and repeating the process until the whole outline is bonded;
s4, adjusting the jetting frequency of the printing head in S3 through digital control, so that the resin amount jetted by the printing head in unit area is increased compared with that jetted by the former setting;
s5, controlling the ejection quantity of the printing head in the S3, and increasing the strength of printing the sand mold part;
s6, after the machine printing is finished, standing the sample in a forming box for more than or equal to 5 hours, and taking out the sample for testing.
Preferably, the sand spread in S3 is 0.15mm phi, and the original sand is 0.19mm phi.
Preferably, the ejection frequency of the print head in S4 is changed by the control software to change the signal frequency of the circuit.
Preferably, the ejection volume of the print head in S5 is controlled by increasing the size of the print head or increasing the ejection flow rate of the print head, the ejection flow rate being controlled by a control valve connected to the print head.
Compared with the prior art, the invention has the beneficial effects that:
the printing sand core strength can be improved, so that the core breaking condition is avoided under the pouring condition, the surface of the casting is smooth, and the poured casting meets the requirement of oil pressure.
Drawings
FIG. 1 is a valve body for a multi-way valve of an aerial mechanical device.
Fig. 2 is a flow chart of a high-intensity printing method for sand molds.
Fig. 3 is a three-dimensional model of a sand mold high-intensity printing mode.
Fig. 4 is a schematic layer-cutting diagram of a sand high-intensity printing mode.
Fig. 5 is a schematic diagram of a software interface for controlling the ejection frequency of a print head in a sand high-intensity printing mode.
Fig. 6 is a sample of a sand mold high intensity printing format product.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention can be more readily understood by those skilled in the art, and the scope of the invention will be more clearly defined.
Referring to fig. 1 to 6, an embodiment of the present invention includes:
the utility model provides a sand mould high strength printing mode, this kind of sand mould high strength printing mode includes following step:
s1, establishing a three-dimensional model, importing three-dimensional data into layer cutting software of a printing machine system, and cutting layers by the layer cutting software, as shown in FIG. 3;
s2, cutting the three-dimensional data into layers with the thickness of 0.3mm by slicing software, converting control signals of each layer, and transmitting the signals to a 3D printer as shown in figure 4;
s3, starting printing, spreading powder layer by a scraper of the 3D printer, spraying a binder by a printing head of the 3D printer to bond sand, moving a workbench downwards, and repeating the process until the whole outline is bonded;
s4, adjusting the jetting frequency of the printing head in S3 through digital control, so that the resin amount jetted by the printing head in a unit area is increased compared with that jetted by the former setting, as shown in FIG. 5;
s5, controlling the ejection quantity of the printing head in the S3, and increasing the strength of printing the sand mold part;
s6, after the machine printing is finished, standing the sample in a forming box for more than or equal to 5 hours, and taking out the sample for testing, as shown in FIG 6.
The sand paved in the S3 is phi 0.15mm, and the original sand is phi 0.19 mm.
The ejection frequency of the print head in said S4 is changed by the control software to the signal frequency of the circuit.
The ejection volume of the print head in S5 is controlled by increasing the size of the print head or increasing the ejection flow rate of the print head, the ejection flow rate being controlled by a control valve connected to the print head.
The sand mold test strength pairs for two sets of sizes of sand, 0.15mm and 0.19mm are shown in table one below:
table one: sand mould test strength comparison table
From two sets of test strip samples printed under the same conditions, in a tensile and bending resistance test, the fact that 0.15mm sand and high-frequency injection resin are adopted is found that the printing strength is actually increased, the problem that some complex castings are difficult to cast is solved, and the technical development and innovation of the traditional casting industry are promoted.
According to the high-strength printing mode of the sand mold, the strength of the printing sand core can be improved, so that the core breaking condition is avoided under the pouring condition, the surface of the casting is smooth, and the poured casting meets the requirement of oil pressure.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. The utility model provides a sand mould high strength printing mode which characterized in that: the high-intensity printing method of the sand mold comprises the following steps:
s1, establishing a three-dimensional model, importing three-dimensional data into layer cutting software of a printing machine system, and cutting layers by the layer cutting software;
s2, cutting the three-dimensional data into layers with the thickness of 0.3mm by slicing software, converting control signals of each layer, and transmitting the signals to a 3D printer;
s3, starting printing, spreading powder layer by a scraper of the 3D printer, spraying a binder by a printing head of the 3D printer to bond sand, moving a workbench downwards, and repeating the process until the whole outline is bonded;
s4, adjusting the jetting frequency of the printing head in S3 through digital control, so that the resin amount jetted by the printing head in unit area is increased compared with that jetted by the former setting;
s5, controlling the ejection quantity of the printing head in the S3, and increasing the strength of printing the sand mold part;
s6, after the machine printing is finished, standing the sample in a forming box for more than or equal to 5 hours, and taking out the sample for testing.
2. A sand mold high-intensity printing method according to claim 1, characterized in that: the sand paved in the S3 is 0.15mm in diameter.
3. A sand mold high-intensity printing method according to claim 1, characterized in that: the ejection frequency of the print head in said S4 is changed by the control software to the signal frequency of the circuit.
4. A sand mold high-intensity printing method according to claim 1, characterized in that: the ejection volume of the print head in S5 is controlled by increasing the size of the print head or increasing the ejection flow rate of the print head, the ejection flow rate being controlled by a control valve connected to the print head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265633.7A CN112371918A (en) | 2020-11-13 | 2020-11-13 | High-strength printing mode for sand mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265633.7A CN112371918A (en) | 2020-11-13 | 2020-11-13 | High-strength printing mode for sand mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112371918A true CN112371918A (en) | 2021-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202011265633.7A Pending CN112371918A (en) | 2020-11-13 | 2020-11-13 | High-strength printing mode for sand mold |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107716855A (en) * | 2017-09-08 | 2018-02-23 | 机械科学研究总院先进制造技术研究中心 | A kind of manufacturing process of sand mold self-adaption gradient printing |
| CN108339937A (en) * | 2018-02-07 | 2018-07-31 | 北京机科国创轻量化科学研究院有限公司 | A kind of high-performance and high accuracy sand mold（Core）3D printing manufacturing process |
| CN110936613A (en) * | 2019-11-30 | 2020-03-31 | 共享智能铸造产业创新中心有限公司 | 3D printing sand model surface effect process treatment method |
| CN111515377A (en) * | 2020-05-29 | 2020-08-11 | 中国航发南方工业有限公司 | Complex thin-wall aluminum-magnesium alloy casting and casting method thereof |
-
2020
- 2020-11-13 CN CN202011265633.7A patent/CN112371918A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107716855A (en) * | 2017-09-08 | 2018-02-23 | 机械科学研究总院先进制造技术研究中心 | A kind of manufacturing process of sand mold self-adaption gradient printing |
| CN108339937A (en) * | 2018-02-07 | 2018-07-31 | 北京机科国创轻量化科学研究院有限公司 | A kind of high-performance and high accuracy sand mold（Core）3D printing manufacturing process |
| CN110936613A (en) * | 2019-11-30 | 2020-03-31 | 共享智能铸造产业创新中心有限公司 | 3D printing sand model surface effect process treatment method |
| CN111515377A (en) * | 2020-05-29 | 2020-08-11 | 中国航发南方工业有限公司 | Complex thin-wall aluminum-magnesium alloy casting and casting method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 尚红标等: "缸体铸件砂型的3D打印快速成型技术及应用", 《现代铸铁》 * |
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Application publication date: 20210219 |
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