CN114535517A - Forming method of revolving body casting - Google Patents
Forming method of revolving body casting Download PDFInfo
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- CN114535517A CN114535517A CN202011350489.7A CN202011350489A CN114535517A CN 114535517 A CN114535517 A CN 114535517A CN 202011350489 A CN202011350489 A CN 202011350489A CN 114535517 A CN114535517 A CN 114535517A
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- 238000005266 casting Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 18
- 208000015943 Coeliac disease Diseases 0.000 claims abstract description 28
- 238000013461 design Methods 0.000 claims abstract description 22
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 230000009977 dual effect Effects 0.000 claims abstract description 7
- 230000007547 defect Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention belongs to the technical field of casting, and particularly relates to a forming method of a revolving body casting. The molding method comprises a pouring gate design and a casting process, wherein the pouring gate design comprises the following steps: dual runner and dual sprue designs: the large-end gap sprue and the small-end gap sprue are communicated through a second cross runner, and the large end and the small end of the casting adopt sprues with different quantities. The method can effectively solve the problem that the small end of the molded revolving body casting is loosened, contracted holes and the like due to the fact that the small end of the revolving body casting is overheated caused by the number of the pouring channels, and effectively improves the product quality.
Description
Technical Field
The invention belongs to the technical field of casting, and particularly relates to a forming method of a revolving body casting.
Background
A straight line and a curve (or straight line) are arranged in the plane, the straight line is taken as a rotating shaft, the curve (or straight line) is taken as a generatrix to rotate for a circle, a curved surface formed by the track of the straight line is taken as a rotating surface, and a solid contained by the rotating surface is a rotating body. The commonly used revolving bodies include cylinders, cones, spheres, ellipsoids, paraboloids (bodies) and hyperboloids (bodies) of revolution (research on the commonly used revolving bodies in engineering, guo, mechanical, 2006, volume 33, line S1, page 47, left column, section 1, lines 1-5, published 2006, 12/31).
The revolving body casting is widely applied to the civil and military product fields such as civil use, aerospace, weapons and the like, such as wheels, airplane skins, missile shells and the like. The formed revolving body products, especially the large revolving body products, play a vital role in the national defense industries of machinery, electronics, chemical industry, automobiles, aerospace and the like.
However, the revolving body casting manufactured by the existing process has the defects of looseness, shrinkage cavity and the like, so that the product quality is influenced.
Disclosure of Invention
In view of the above, the present invention aims to provide a double-runner molding method for a revolving body casting, which can effectively avoid the problem of overheating of the casting small end caused by excessive number of gap runners by respectively adopting different numbers of runners for the large end and the small end of the revolving body casting, so that the formed revolving body casting does not have the defects of looseness, shrinkage cavity, and the like, and the product quality is effectively improved.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the molding method of the solid of revolution class foundry goods, water and say design and casting process, it includes to say the design:
dual runner and dual sprue designs: the large-end gap sprue and the small-end gap sprue are communicated through a second cross runner, and the large end and the small end of the casting adopt sprues with different quantities.
Further, the cross gate is circular ring-shaped.
Furthermore, the cross section size of the cross runner close to the small-end gap runner is smaller than that of the cross runner close to the large-end gap runner, and the diameter of the small-end gap runner is smaller than or equal to that of the large-end gap runner.
Further, the runner design further comprises:
designing the number of pouring channels: the quantity of the large-end gap pouring channel and the small-end gap pouring channel of the casting is designed according to the outer diameter of the large end of the revolving body casting, the outer diameter of the small end of the revolving body casting and the effective feeding distance of the gap pouring channel, and the quantity of the small-end gap pouring channel is less than or equal to the quantity of the large-end gap pouring channel.
Further, the runner design further comprises:
and (3) pouring gate position design: the large-end gap pouring gate and the small-end gap pouring gate form a certain angle, the small-end gap pouring gate is distributed between the large-end gap pouring gates, and the large-end gap pouring gate and the small-end gap pouring gate are symmetrically distributed along the periphery of the casting respectively.
In the invention, the certain angle ensures that the large-end gap pouring channel and the small-end gap pouring channel are not just opposite.
The invention has the beneficial effects that:
the revolving body casting obtained by the method does not have the defects of looseness, shrinkage cavity and the like, and the product quality is effectively improved.
The method is simple and is beneficial to realizing industrial production.
Drawings
FIG. 1 is a schematic view of a runner of a casting of the rotary body type according to example 1; wherein, 1 is a riser, 2 is a small-end gap sprue, 3 is a second annular cross runner, 4 is a large-end gap sprue, and 5 is a first annular cross runner;
FIG. 2 is an X-ray flaw detection chart of a small end of a casting of a rotary body type obtained in example 1;
FIG. 3 is a schematic view of a runner of a casting of the rotary body type according to example 2; wherein, 1 is a riser, 2 is a small-end gap sprue, 3 is a second annular cross runner, 4 is a large-end gap sprue, and 5 is a first annular cross runner;
FIG. 4 is an X-ray flaw detection chart of a small end of a casting of a rotary body type obtained in example 2; .
Detailed Description
The examples are provided for better illustration of the present invention, but the present invention is not limited to the examples. Therefore, those skilled in the art should make insubstantial modifications and adaptations to the embodiments of the present invention in light of the above teachings and remain within the scope of the invention.
The following examples are given by way of example of a cast solid of revolution having a major end outer diameter of 1000mm, a minor end outer diameter of 500mm, a height of 800mm and a wall thickness of 20 mm.
Example 1
The present embodiment adopts a ZL205A alloy molding solid casting, which includes a pouring gate design and a casting process, wherein the pouring gate design includes:
designing the number of pouring channels: the effective feeding distance of the ZL205A alloy is 4-6 times of the gap width, the outer diameter of the large end of the revolving body casting is 1000mm, the outer diameter of the small end of the revolving body casting is 500mm, the width of a gap pouring gate is designed to be 40mm, and the maximum distance between the two gap pouring gates is 480 mm. Therefore, 8 gap runners are designed at the large end of the revolving body casting, and 4 gap runners are designed at the small end of the revolving body casting;
and (3) pouring gate position design: the large-end gap pouring gate and the small-end gap pouring gate form a 22.5-degree dislocation angle, and the large-end gap pouring gate and the small-end gap pouring gate are symmetrically distributed along the circumference of the casting;
designing a transverse pouring gate: the large-end gap pouring gate and the small-end gap pouring gate are communicated through an annular cross gate, the outer diameter of the cross gate (hereinafter referred to as a second cross annular pouring gate with the sectional dimension of 70mm multiplied by 70mm) close to the small-end gap pouring gate is smaller than that of the cross gate (hereinafter referred to as a first annular cross gate with the sectional dimension of 90mm multiplied by 90mm) close to the large-end gap pouring gate, and the size of the small-end gap sprue (the diameter of the small-end gap sprue is 60mm) is smaller than or equal to that of the large-end gap sprue (the diameter of the small-end gap sprue is 80 mm);
the runner of this embodiment is shown in fig. 1, wherein 1 is a riser, 2 is a small end gap sprue, 3 is a second annular runner, 4 is a large end gap sprue, and 5 is a first annular runner.
Then casting is performed.
Whether the prepared revolving body casting has defects such as looseness, shrinkage cavity and the like is detected through an X-ray real-time detection technology, and the result is shown in figure 2.
As can be seen from fig. 2, the small end of the casting of revolution body produced in this example had no defects such as looseness, shrinkage cavity and the like. Therefore, the revolving body casting formed by the method has no defects of looseness, shrinkage cavity and the like, and the product quality is effectively improved.
Example 2
The present embodiment adopts a molded solid casting of ZL114A alloy, which includes a pouring gate design and a casting process, wherein the pouring gate design includes:
the specific design scheme is as follows:
designing the number of pouring channels: the maximum effective feeding distance of the ZL205A alloy can reach about 8 times of the gap width, the outer diameter of the large end of the revolving body casting is 1000mm, the outer diameter of the small end of the revolving body casting is 500mm, the width of the gap pouring channel is designed to be 40mm, and the maximum distance between the two gap pouring channels is 640 mm. Therefore, 6 gap runners are designed at the large end of the revolving body casting, and 3 gap runners are designed at the small end of the revolving body casting;
and (3) pouring gate position design: the large-end gap pouring gate and the small-end gap pouring gate form a 30-degree dislocation angle, and the large-end gap pouring gate and the small-end gap pouring gate are symmetrically distributed along the periphery of the casting;
designing a transverse pouring channel: the large-end gap pouring gate and the small-end gap pouring gate are communicated through a circular annular cross gate, the outer diameter of the cross gate (hereinafter referred to as a second annular cross gate with the sectional dimension of 65mm multiplied by 65mm) close to the small-end gap pouring gate is smaller than that of the cross gate (hereinafter referred to as a first annular cross gate with the sectional dimension of 80mm multiplied by 80mm) close to the large-end gap pouring gate, and the size of the small-end gap sprue (the diameter of the small-end gap sprue is 65mm) is less than or equal to that of the large-end gap sprue (the diameter of the small-end gap sprue is 75 mm);
the final design of the dual runner is shown in FIG. 3.
The runner of this embodiment is shown in fig. 1, wherein 1 is a riser, 2 is a small end gap sprue, 3 is a second annular runner, 4 is a large end gap sprue, and 5 is a first annular runner.
Then casting is performed.
The real-time detection technology of X-ray is used for detecting whether the prepared revolving body casting has defects such as looseness, shrinkage cavity and the like, and the result is shown in figure 4.
As can be seen from fig. 4, the small end of the cast product of revolution body produced in this example had no defects such as looseness, shrinkage cavity and the like. Therefore, the revolving body casting formed by the method has no defects of looseness, shrinkage cavity and the like, and the product quality is effectively improved.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The molding method of the revolving body casting comprises a pouring gate design and a casting process, and is characterized in that the pouring gate design comprises the following steps:
dual runner and dual sprue designs: the large-end gap sprue and the small-end gap sprue are communicated through a second cross runner, and the large end and the small end of the casting adopt sprues with different quantities.
2. The molding method according to claim 1, wherein the runner is circular ring-shaped.
3. A method of forming according to claim 1 or claim 2 wherein the cross sectional dimension of the runner adjacent the small end slot runner is less than the cross sectional dimension of the runner adjacent the large end slot runner and the diameter of the small end slot runner is less than or equal to the diameter of the large end slot runner.
4. The molding process of any one of claims 1 to 3, wherein the runner design further comprises:
designing the number of pouring channels: the quantity of the large-end gap pouring channel and the small-end gap pouring channel of the casting is designed according to the outer diameter of the large end of the revolving body casting, the outer diameter of the small end of the revolving body casting and the effective feeding distance of the gap pouring channel, and the quantity of the small-end gap pouring channel is less than or equal to the quantity of the large-end gap pouring channel.
5. The molding process of any one of claims 1 to 4, wherein the runner design further comprises:
and (3) pouring gate position design: the large-end gap pouring gate and the small-end gap pouring gate form a certain angle, the small-end gap pouring gate is distributed between the large-end gap pouring gates, and the large-end gap pouring gate and the small-end gap pouring gate are symmetrically distributed along the periphery of the casting respectively.
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| CN202011350489.7A CN114535517B (en) | 2020-11-26 | 2020-11-26 | Forming method of revolving body casting |
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| CN202011350489.7A CN114535517B (en) | 2020-11-26 | 2020-11-26 | Forming method of revolving body casting |
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