CN112091168A - 3D printing processing technique for extra-high pressure valve hall hardware - Google Patents
3D printing processing technique for extra-high pressure valve hall hardware Download PDFInfo
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- CN112091168A CN112091168A CN202010910473.0A CN202010910473A CN112091168A CN 112091168 A CN112091168 A CN 112091168A CN 202010910473 A CN202010910473 A CN 202010910473A CN 112091168 A CN112091168 A CN 112091168A
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- valve hall
- pressure valve
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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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to a 3D printing processing technique for high-pressure valve hall hardware fittings, which comprises the following steps: the method comprises the following steps: designing a high-pressure valve hall hardware three-dimensional formwork according to an extra-high pressure valve hall hardware product; step two: printing layer by using a 3D printer, spreading powder layer by layer, printing once, and alternately printing with the printing thickness of 0.1-0.5 mm; step three: after printing is finished, removing redundant powder; step four: burying the three-dimensional formwork of the extra-high pressure valve hall hardware in casting molding sand; step five: pouring aluminum alloy into a pouring gate of a three-dimensional formwork of the hardware fitting of the extra-high pressure valve hall; step six: completely solidifying the aluminum alloy liquid, and forming the extra-high voltage valve hall hardware fitting blank; step seven: and cutting off a sprue and a cap opening of the extra-high pressure valve hall hardware fitting blank, removing flash and burrs, polishing on an abrasive cloth belt, and putting the abrasive cloth belt into a shot blasting machine for surface treatment. The invention has the advantages that: the problem of extra-high voltage valve room gold utensil course of working, the mould expense occupies the cost too high is solved, manufacturing cost is reduced, the waste has been avoided.
Description
Technical Field
The invention relates to the field of extra-high voltage valve hall hardware, in particular to a 3D printing processing technique for extra-high voltage valve hall hardware.
Background
In the extra-high voltage transmission and transformation project, the conversion of extra-high voltage direct current and alternating current is completed through an extra-high voltage direct current converter station, and an extra-high voltage valve hall is the heart of the extra-high voltage direct current converter station.
Although the hardware has a small proportion in the valve hall, the hardware bears the electrical load and the mechanical load of the converter station, so that the design needs to consider a plurality of factors such as current-carrying capacity, the shape and the connection angle of an equipment terminal, the mechanical load, self weight, the load which can be borne by the equipment terminal, corona prevention requirements, radio interference performance, overall noise level and the like.
The use requirements of the extra-high pressure valve hall hardware result in more products and less quantity. Due to the complex shape, in the processing process of the extra-high voltage valve hall hardware fitting, each variety needs a mold to finish the processing of the product, the using amount of single variety products is small, the cost of the product is far less than that of the mold, and the molds of most products are idle once used, so that the great cost occupation and the resource waste are caused. In view of the above situation, how to reduce the processing cost of the fitting in the extra high pressure valve hall becomes a difficult problem to be solved urgently in the extra high pressure valve hall fitting processing industry.
Disclosure of Invention
The invention aims to solve the technical problems and provides a 3D printing processing technique for extra-high voltage valve hall hardware.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the 3D printing processing technique for the extra-high pressure valve hall hardware comprises the following steps:
the method comprises the following steps: designing a high-pressure valve hall hardware three-dimensional formwork according to an extra-high pressure valve hall hardware product, and performing post-processing to obtain three-dimensional graphic data of the valve hall hardware three-dimensional formwork, wherein the obtained data meets the working requirements of 3D printing equipment;
step two: printing layer by using a 3D printer, spreading powder layer by layer, printing once, and alternately printing with the printing thickness of 0.1-0.5 mm;
step three: after printing is finished, removing redundant powder, wherein the formed three-dimensional formwork of the extra-high voltage valve hall hardware fitting is made of a mixture of molding sand and resin;
step four: burying the three-dimensional formwork of the extra-high pressure valve hall hardware in casting molding sand, wherein the pouring gate and the cap opening are 5mm higher than the plane of the casting molding sand;
step five: heating the aluminum alloy casting material to 730-750 ℃, refining for 15 minutes and modifying for 18 minutes, pouring aluminum alloy into a pouring gate of a three-dimensional formwork of an extra-high pressure valve hall hardware fitting when the temperature of aluminum alloy liquid reaches 750 ℃, and stopping pouring when the aluminum alloy liquid rises to a cap opening plane;
step six: cooling the aluminum alloy liquid in the three-dimensional formwork of the hardware fitting in the extra-high pressure valve hall for 25-35 minutes according to the appearance size of the hardware fitting product in the extra-high pressure valve hall, completely solidifying the aluminum alloy liquid, opening casting molding sand, taking out the hardware fitting casting in the extra-high pressure valve hall, knocking off the three-dimensional formwork of the hardware fitting in the extra-high pressure valve hall, and forming a blank of the hardware fitting in the extra-high pressure valve hall;
step seven: cutting off a sprue and a cap opening of the extra-high pressure valve hall hardware fitting blank, removing flash and burrs, polishing on an abrasive cloth belt smoothly, and putting into a shot blasting machine for surface treatment;
step eight: and (4) carrying out machining treatment on the electrical contact surface of the extra-high pressure valve hall hardware fitting, wherein the surface roughness meets the drawing requirement, and forming an extra-high pressure valve hall hardware fitting finished product.
The thickness of the three-dimensional formwork of the high-pressure valve hall hardware in the step one is 3-5 mm.
And (3) designing the pouring gate and the cap opening on the three-dimensional formwork of the high-pressure valve hall hardware fitting in the step one on two sides of the mass center of the product in a symmetrical design, wherein the pouring gate and the cap opening can be interchanged.
And the powder paving material in the second step is molding sand, and the printing and spraying material is resin binder.
Compared with the prior art, the invention has the advantages that: in the device provided by the invention, the extra-high voltage valve hall hardware obtained by using the 3D printing method can meet the use requirement, and also solves the problem of overhigh cost of mold cost occupation in the processing process of the extra-high voltage valve hall hardware, thereby reducing the production cost and avoiding waste.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention is further described in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The 3D printing processing technique for the extra-high pressure valve hall hardware comprises the following steps:
the method comprises the following steps: designing a high-pressure valve hall hardware three-dimensional formwork according to an extra-high pressure valve hall hardware product, and performing post-processing to obtain three-dimensional graphic data of the valve hall hardware three-dimensional formwork, wherein the obtained data meets the working requirements of 3D printing equipment;
step two: printing layer by using a 3D printer, spreading powder layer by layer, printing once, and alternately printing with the printing thickness of 0.1-0.5 mm;
step three: after printing is finished, removing redundant powder, wherein the formed three-dimensional formwork of the extra-high voltage valve hall hardware fitting is made of a mixture of molding sand and resin;
step four: burying the three-dimensional formwork of the extra-high pressure valve hall hardware in casting molding sand, wherein the pouring gate and the cap opening are 5mm higher than the plane of the casting molding sand;
step five: heating the aluminum alloy casting material to 730-750 ℃, refining for 15 minutes and modifying for 18 minutes, pouring aluminum alloy into a pouring gate of a three-dimensional formwork of an extra-high pressure valve hall hardware fitting when the temperature of aluminum alloy liquid reaches 750 ℃, and stopping pouring when the aluminum alloy liquid rises to a cap opening plane;
step six: cooling the aluminum alloy liquid in the three-dimensional formwork of the hardware fitting in the extra-high pressure valve hall for 25-35 minutes according to the appearance size of the hardware fitting product in the extra-high pressure valve hall, completely solidifying the aluminum alloy liquid, opening casting molding sand, taking out the hardware fitting casting in the extra-high pressure valve hall, knocking off the three-dimensional formwork of the hardware fitting in the extra-high pressure valve hall, and forming a blank of the hardware fitting in the extra-high pressure valve hall;
step seven: cutting off a sprue and a cap opening of the extra-high pressure valve hall hardware fitting blank, removing flash and burrs, polishing on an abrasive cloth belt smoothly, and putting into a shot blasting machine for surface treatment;
step eight: and (4) carrying out machining treatment on the electrical contact surface of the extra-high pressure valve hall hardware fitting, wherein the surface roughness meets the drawing requirement, and forming an extra-high pressure valve hall hardware fitting finished product.
The thickness of the three-dimensional formwork of the high-pressure valve hall hardware in the step one is 3-5 mm.
And (3) designing the pouring gate and the cap opening on the three-dimensional formwork of the high-pressure valve hall hardware fitting in the step one on two sides of the mass center of the product in a symmetrical design, wherein the pouring gate and the cap opening can be interchanged.
And the powder paving material in the second step is molding sand, and the printing and spraying material is resin binder.
The method has the advantages that the 3D printing process is introduced into the manufacturing of the extra-high pressure valve hall hardware, the pouring mode is adopted, the extra-high pressure valve hall hardware is obtained, the defects that the traditional extra-high pressure valve hall hardware is complex in casting or machining process and high in cost are overcome, the process is simple, the operation procedures are few, the consumed time is little, the forming rate is high, simplicity and rapidness are achieved, and the method is suitable for batch and large-scale production.
The present invention and the embodiments thereof have been described above without limitation, and it is within the scope of the present invention that those skilled in the art should be able to devise similar structural modes and embodiments without inventive changes without departing from the spirit and scope of the present invention.
Claims (4)
1. The 3D printing processing technique for the extra-high pressure valve hall hardware is characterized by comprising the following steps: it comprises the following steps:
the method comprises the following steps: designing a high-pressure valve hall hardware three-dimensional formwork according to an extra-high pressure valve hall hardware product, and performing post-processing to obtain three-dimensional graphic data of the valve hall hardware three-dimensional formwork, wherein the obtained data meets the working requirements of 3D printing equipment;
step two: printing layer by using a 3D printer, spreading powder layer by layer, printing once, and alternately printing with the printing thickness of 0.1-0.5 mm;
step three: after printing is finished, removing redundant powder, wherein the formed three-dimensional formwork of the extra-high voltage valve hall hardware fitting is made of a mixture of molding sand and resin;
step four: burying the three-dimensional formwork of the extra-high pressure valve hall hardware in casting molding sand, wherein the pouring gate and the cap opening are 5mm higher than the plane of the casting molding sand;
step five: heating the aluminum alloy casting material to 730-750 ℃, refining for 15 minutes and modifying for 18 minutes, pouring aluminum alloy into a pouring gate of a three-dimensional formwork of an extra-high pressure valve hall hardware fitting when the temperature of aluminum alloy liquid reaches 750 ℃, and stopping pouring when the aluminum alloy liquid rises to a cap opening plane;
step six: cooling the aluminum alloy liquid in the three-dimensional formwork of the hardware fitting in the extra-high pressure valve hall for 25-35 minutes according to the appearance size of the hardware fitting product in the extra-high pressure valve hall, completely solidifying the aluminum alloy liquid, opening casting molding sand, taking out the hardware fitting casting in the extra-high pressure valve hall, knocking off the three-dimensional formwork of the hardware fitting in the extra-high pressure valve hall, and forming a blank of the hardware fitting in the extra-high pressure valve hall;
step seven: cutting off a sprue and a cap opening of the extra-high pressure valve hall hardware fitting blank, removing flash and burrs, polishing on an abrasive cloth belt smoothly, and putting into a shot blasting machine for surface treatment;
step eight: and (4) carrying out machining treatment on the electrical contact surface of the extra-high pressure valve hall hardware fitting, wherein the surface roughness meets the drawing requirement, and forming an extra-high pressure valve hall hardware fitting finished product.
2. The 3D printing processing technique for extra-high voltage valve hall hardware fittings according to claim 1 is characterized in that: the thickness of the three-dimensional formwork of the high-pressure valve hall hardware in the step one is 3-5 mm.
3. The 3D printing processing technique for extra-high voltage valve hall hardware fittings according to claim 1 is characterized in that: and (3) designing the pouring gate and the cap opening on the three-dimensional formwork of the high-pressure valve hall hardware fitting in the step one on two sides of the mass center of the product in a symmetrical design, wherein the pouring gate and the cap opening can be interchanged.
4. The 3D printing processing technique for extra-high voltage valve hall hardware fittings according to claim 1 is characterized in that: and the powder paving material in the second step is molding sand, and the printing and spraying material is resin binder.
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| CN202010910473.0A CN112091168B (en) | 2020-09-02 | 2020-09-02 | 3D printing processing technique method for extra-high pressure valve hall hardware |
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| CN202010910473.0A CN112091168B (en) | 2020-09-02 | 2020-09-02 | 3D printing processing technique method for extra-high pressure valve hall hardware |
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| CN112091168A true CN112091168A (en) | 2020-12-18 |
| CN112091168B CN112091168B (en) | 2022-07-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834360A (en) * | 2015-11-18 | 2016-08-10 | 连云港源钰金属制品有限公司 | Casting method for making shell mold through 3D printing |
| CN106493293A (en) * | 2016-10-25 | 2017-03-15 | 四川大学 | A kind of method that fast and low-cost produces metal material intention handicraft |
| CN109622964A (en) * | 2019-01-09 | 2019-04-16 | 泰瑞机器股份有限公司 | A kind of skeleton reinforced metal material 3D printing molding machine and method |
| CN111408690A (en) * | 2020-04-07 | 2020-07-14 | 滁州金诺实业有限公司 | High-performance aluminum alloy casting dieless forming casting method |
-
2020
- 2020-09-02 CN CN202010910473.0A patent/CN112091168B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834360A (en) * | 2015-11-18 | 2016-08-10 | 连云港源钰金属制品有限公司 | Casting method for making shell mold through 3D printing |
| CN106493293A (en) * | 2016-10-25 | 2017-03-15 | 四川大学 | A kind of method that fast and low-cost produces metal material intention handicraft |
| CN109622964A (en) * | 2019-01-09 | 2019-04-16 | 泰瑞机器股份有限公司 | A kind of skeleton reinforced metal material 3D printing molding machine and method |
| CN111408690A (en) * | 2020-04-07 | 2020-07-14 | 滁州金诺实业有限公司 | High-performance aluminum alloy casting dieless forming casting method |
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| CN112091168B (en) | 2022-07-19 |
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