CN109663890B - Manufacturing method of barrel casting - Google Patents
Manufacturing method of barrel casting Download PDFInfo
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- CN109663890B CN109663890B CN201710967365.5A CN201710967365A CN109663890B CN 109663890 B CN109663890 B CN 109663890B CN 201710967365 A CN201710967365 A CN 201710967365A CN 109663890 B CN109663890 B CN 109663890B
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- Prior art keywords
- casting
- barrel
- connecting section
- cylinder
- type casting
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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
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
Abstract
The invention relates to a method for manufacturing barrel castings. The manufacturing method of the cylinder casting comprises the following steps: (1) casting a barrel type casting preform, wherein the barrel type casting preform comprises a barrel type casting and annular process ribs which are integrally formed with the barrel type casting and used for supporting the barrel type casting so as to enable the barrel type casting to shrink uniformly in the solidification and heat treatment rapid cooling processes; (2) and uniformly removing the annular process ribs on the cylinder casting preform to manufacture the corresponding cylinder casting. The annular process rib and the barrel casting are integrally formed, the barrel casting is supported and pulled on the whole circumferential surface, the pulling force on the barrel casting is more uniform in the process of solidification and rapid cooling of the barrel casting through heat treatment, the annular process rib is uniformly removed, the pulling force on the barrel casting by the annular process rib on the circumferential surface is simultaneously removed, and the barrel casting is prevented from being deformed due to local stress concentration.
Description
Technical Field
The invention relates to a method for manufacturing barrel castings.
Background
Because the aluminum alloy has small density and high specific strength, the large-scale cylinder aluminum alloy casting is generally applied to aerospace products, and the weight of the aerospace products can be greatly reduced and the fuel can be saved under the condition of the same strength. For some cylindrical castings, holes are required to be formed in the cylindrical castings or the cylindrical castings are required to be thickened due to functional requirements, the castings are integrally of asymmetric structures, and the phenomenon that shrinkage of all parts is inconsistent occurs in the casting solidification and heat treatment rapid cooling processes, so that the castings deform.
For the problem of inconsistent shrinkage of castings with asymmetric structures in the solidification and heat treatment rapid cooling processes, common solutions include increasing the reverse deformation amount, welding process ribs and the like. For the method for preventing the cylinder casting from deforming by welding the process ribs, the welded process ribs are generally radiation-shaped process ribs, the hub-shaped or radiation-shaped process ribs are uniformly arranged on the end surface of the cylinder casting, the end surface of the process ribs is in point connection with the cylinder casting, in the later process of removing the process ribs, the connection points of the process ribs and the casting need to be sequentially disconnected, and when one connection point of the process ribs and the casting is removed, the rest connection points which are not removed enable the process ribs to still have tension on the casting, so that the casting has stress concentration and deforms.
Disclosure of Invention
The invention aims to provide a manufacturing method of a barrel type casting, which aims to solve the problem that the casting still deforms when process ribs are removed in the prior art.
In order to solve the technical problems, the technical scheme of the manufacturing method of the cylinder casting is as follows:
scheme 1: a manufacturing method of a barrel casting comprises the following steps: (1) casting a barrel type casting preform, wherein the barrel type casting preform comprises a barrel type casting and annular process ribs which are integrally formed with the barrel type casting and used for supporting the barrel type casting so as to enable the barrel type casting to shrink uniformly in the solidification and heat treatment rapid cooling processes; (2) and uniformly removing the annular process ribs on the cylinder casting preform to manufacture the corresponding cylinder casting.
The technical scheme has the beneficial effects that: the annular process rib and the barrel casting are integrally formed, the barrel casting is supported and pulled on the whole circumferential surface, the pulling force on the barrel casting is more uniform in the process of solidification and rapid cooling of the barrel casting through heat treatment, the annular process rib is uniformly removed, the pulling force on the barrel casting by the annular process rib on the circumferential surface is simultaneously removed, and the barrel casting is prevented from being deformed due to local stress concentration.
Scheme 2: according to the manufacturing method of the cylinder casting in the scheme 1, the cylinder casting is provided with a cylinder body and ports arranged on end faces of two ends of the cylinder body, and the annular technological ribs are arranged in the ports. The annular process rib is positioned at the port to feed the port of the cylinder casting, so that the cylinder casting is prevented from shrinkage porosity and shrinkage cavity.
Scheme 3: according to the manufacturing method of the cylinder casting in the scheme 2, the two ends of the cylinder casting are provided with the end edges extending along the radial direction of the cylinder, the circumferential surface enclosed by the inner walls of the end edges forms the port, and the annular process ribs and the end edges are integrally arranged. The end edge is of a structure that the barrel type casting is connected with other equipment, the thickness of the end edge is larger than that of the barrel, the solidification cooling speed is slower, shrinkage porosity and shrinkage cavity phenomena are easy to occur, and the annular process rib is arranged on the end edge and can be used for feeding the end edge.
Scheme 4: according to the manufacturing method of the barrel type casting of the aspect 3, the upper surface of the annular technological rib is flush with the upper surface of the end edge. The mold is convenient for manufacturing the cylinder casting preform.
Scheme 5: according to the manufacturing method of the barrel type casting of the scheme 4, the annular technological rib is provided with the connecting section which is in contact with the end edge, and the thickness of the connecting section is smaller than that of the end edge. The thickness of the connecting section is small, so that hot spots at the end edge are prevented from being increased, and meanwhile, the connecting section of the annular process rib can be solidified and shrunk before the end edge, so that the function of supporting the cylinder type casting is achieved.
Scheme 6: according to the manufacturing method of the barrel casting in the scheme 5, the inner wall of the connecting section of the annular technical rib is provided with the reinforcing section extending along the radial direction of the annular technical rib, and the thickness of the reinforcing section is larger than that of the connecting section. The reinforcing section with larger thickness can reinforce the shrinkage of the annular process rib, ensure that the shrinkage force of the annular process rib can drive the barrel castings to shrink uniformly, and ensure the shrinkage uniformity of the barrel castings.
Scheme 7: the method for manufacturing a barrel-type casting according to claim 6, wherein a radial length of the connecting section is not less than a thickness of the connecting section. The distance between the reinforcing section and the end edge is increased, and the influence of the temperature of the reinforcing section on the cooling speed of the end edge in the cooling solidification process is reduced.
Scheme 8: the method for manufacturing a barrel-type casting according to claim 7, wherein the radial length of the connecting section is twice the thickness of the connecting section. The radial length of the connecting section is twice of the thickness of the connecting section, so that a sufficient distance is ensured between the reinforcing section and the end edge, and meanwhile, the length of the connecting section is not too long.
Scheme 9: according to the manufacturing method of the barrel casting in any one of the aspects 1 to 8, in the step (2), the annular process rib is removed through turning. The turning processing is convenient and fast, and simultaneously the turning can also ensure that the annular process rib is uniformly removed as much as possible.
Scheme 10: the method for producing a barrel casting according to any one of claims 1 to 8, wherein the barrel casting is an aluminum alloy barrel casting.
Drawings
Fig. 1 is a schematic structural view of a barrel type casting preform produced by embodiment 1 of the method for producing a barrel type casting according to the present invention;
FIG. 2 is a cross-sectional view of the cartridge type casting preform of FIG. 1;
fig. 3 is a schematic structural view of a barrel casting produced in example 1 of the method for producing a barrel casting according to the present invention.
The respective symbols in the figure: 1. a barrel; 2. annular technological ribs; 11. an end edge; 21. a connecting section; 22. and a reinforcing section.
Detailed Description
The preformed product of the cast barrel casting comprises a barrel casting and an annular process rib 2, wherein the barrel casting comprises a barrel 1, two ends of the barrel 1 are respectively provided with an end edge 11 extending along the radial direction of the barrel 1, the peripheral surface surrounded by the inner wall of the end edge 11 forms a port of the barrel 1, the annular process rib is respectively and integrally formed in the port formed by the end edge 11, the end edge 11 is a structure for connecting the barrel casting with other equipment, the thickness of the end edge 11 exceeds the thickness of the barrel 1, the thickness of the end edge 11 refers to the distance between the upper surface and the lower surface of the end edge 11 in the axial direction of the barrel casting, and the thickness of the barrel 1 refers to the distance between the inner wall and the outer wall of the barrel 1 in the radial direction; the upper surface of the end edge 11 is flush with the upper surface of the annular technological rib 2, so that the annular technological rib 2 can feed the end edge 11 in the solidification process, and shrinkage porosity or shrinkage cavities of the end edge 11 are prevented.
The annular process rib 2 is provided with a connecting section 21 used for being in contact with the end edge 11, a reinforcing section 22 extending along the radial direction of the annular process rib is arranged on the inner wall of the connecting section 21, the thickness of the connecting section 21 is smaller than that of the end edge 11, the thickness of the reinforcing section 22 is larger than that of the connecting section 21, the thickness of the connecting section 21 refers to the distance between the upper surface and the lower surface of the connecting section 21 in the axial direction of the cylinder type casting, and the thickness of the reinforcing section 22 refers to the distance between the upper surface and the lower surface of the reinforcing section 22 in the axial direction of the cylinder type casting; the thickness of the connecting section 21 is smaller than that of the end edge 11, so that hot spots of corresponding parts at the end edge can be prevented from being increased, the possibility of shrinkage porosity and shrinkage cavity at the end edge 11 is reduced, and meanwhile, the connecting section 21 is solidified and shrunk before the end edge, so that the cylindrical casting is supported; the thickness of the reinforcing section 22 is larger than that of the connecting section 21, so that the shrinkage of the annular process rib can be enhanced, the shrinkage force of the annular process rib can drive the uniform shrinkage of the barrel castings, and the shrinkage uniformity of the barrel castings is ensured; the radial length of the connecting section 21 is not less than the thickness of the connecting section, the radial length of the connecting section 21 refers to the distance between the outer wall of the connecting section 21 and the outer wall of the reinforcing section 22 in the radial direction of the cylinder casting, in this embodiment, the radial length of the connecting section 21 is twice the thickness of the connecting section, the influence of the temperature of the reinforcing section on the cooling speed of the end edge in the cooling solidification process of the cylinder casting preform can be reduced, in other embodiments, the radial length of the connecting section 21 can be the same as the thickness of the connecting section, or can be 1.5 times or 3 times of the thickness of the connecting section, and the like, namely, the radial length of the connecting section 21 is greater than or equal to the thickness; in other embodiments, the reinforcing section can be omitted under the condition of ensuring the tensile force of the annular technical rib, and the end edges are stretched only by the connecting section; the upper surfaces of the reinforcing section 22 and the connecting section 21 are flush with the upper surface of the rim 11.
The finally manufactured barrel type casting is shown in figure 3, the barrel type casting is an asymmetric casting, openings, bosses and the like are distributed on the inner wall of the barrel type casting, the process requires that the inner circle diameter of the barrel type casting is phi 1100mm, the tolerance requirement is +/-0.5, under the condition of not using the manufacturing method of the barrel type casting, the maximum measurement size of the inner circle diameter of the barrel type casting after solidification is phi 1101mm, the minimum size is phi 1099mm, the ellipse phenomenon already occurs, the tolerance is +/-1, the casting deforms again after the point connection type process ribs are removed through solution treatment, the maximum inner circle diameter is phi 1102mm, the minimum size is 109phi 8mm, the tolerance is +/-2, and the process requirement cannot be met; after the cylinder casting manufactured by the manufacturing method of the cylinder casting is solidified, the maximum diameter of the measured inner circle is phi 1100mm, the minimum diameter is phi 1099mm, the tolerance is +/-0.5, and the process requirement is met.
In other embodiments of the method for manufacturing a barrel-type casting, the step (2) may be performed by grinding or milling; the annular technological rib can also be arranged on the position of the cylinder type casting close to the middle section of the cylinder type casting.
Claims (5)
1. A method for manufacturing a barrel casting, comprising the steps of: (1) casting a barrel type casting preform, wherein the barrel type casting preform comprises a barrel type casting and annular process ribs which are integrally formed with the barrel type casting and used for supporting the barrel type casting so as to enable the barrel type casting to shrink uniformly in the solidification and heat treatment rapid cooling processes; the annular process ribs play a role in supporting and pulling the cylinder type casting on the whole circumferential surface; the cylinder casting is provided with a cylinder body and ports arranged on end faces of two ends of the cylinder body, and the annular process ribs are arranged in the ports; the two ends of the cylinder casting are provided with end edges extending along the radial direction of the cylinder, the peripheral surface enclosed by the inner walls of the end edges forms a port, and the annular process ribs and the end edges are integrally arranged; the upper surface of the annular process rib in the port at the upper end is flush with the upper surface of the end edge at the upper end, and the lower surface of the annular process rib in the port at the lower end is flush with the lower surface of the end edge at the lower end; the annular technological rib is provided with a connecting section which is in contact with the end edge, the thickness of the connecting section is smaller than that of the end edge, and the connecting section is solidified and shrunk before the end edge, so that the cylindrical casting is supported; the inner wall of the connecting section of the annular process rib is provided with a reinforcing section extending along the radial direction of the annular process rib, and the thickness of the reinforcing section is larger than that of the connecting section, so that the shrinkage force of the annular process rib drives the barrel type casting to shrink uniformly, and the shrinkage uniformity of the barrel type casting is ensured; (2) and uniformly removing the annular process ribs on the cylinder casting preform to manufacture the corresponding cylinder casting.
2. The method for producing a barrel-type casting according to claim 1, wherein: the radial length of the connecting section is not less than the thickness of the connecting section.
3. The method for producing a barrel-type casting according to claim 2, characterized in that: the radial length of the connecting section is twice the thickness of the connecting section.
4. The method for producing a barrel casting according to any one of claims 1 to 3, characterized in that: and (2) removing the annular process rib through turning.
5. The method for producing a barrel casting according to any one of claims 1 to 3, characterized in that: the barrel type casting is an aluminum alloy barrel type casting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967365.5A CN109663890B (en) | 2017-10-17 | 2017-10-17 | Manufacturing method of barrel casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967365.5A CN109663890B (en) | 2017-10-17 | 2017-10-17 | Manufacturing method of barrel casting |
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| CN109663890A CN109663890A (en) | 2019-04-23 |
| CN109663890B true CN109663890B (en) | 2021-03-12 |
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| CN112475245A (en) * | 2020-11-25 | 2021-03-12 | 山东淄博燕峰活塞有限公司 | Filter base casting technology |
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| JPS61144263A (en) * | 1984-11-12 | 1986-07-01 | Honda Motor Co Ltd | Casting device of siamese type cylinder block blank material |
| JPH02142646A (en) * | 1988-11-21 | 1990-05-31 | Nippon Kinzoku Kogyo Kk | Casting roll for metal plate continuous casting machine |
| CN202087817U (en) * | 2011-04-25 | 2011-12-28 | 宁国市开源电力耐磨材料有限公司 | Riser bob device of metal wear-resistant ball mold |
| CN202079258U (en) * | 2011-05-23 | 2011-12-21 | 张年生 | Water turbine sleeve moulding assembling box |
| CN204122694U (en) * | 2014-09-22 | 2015-01-28 | 安徽应流铸业有限公司 | Thin-wall part inner chamber is bushing |
| CN204747463U (en) * | 2015-07-06 | 2015-11-11 | 辽宁卡斯特金属材料发展有限公司 | Low pressure the gating system of MR coil |
| CN107008866B (en) * | 2017-06-22 | 2019-04-02 | 洛阳鹏起实业有限公司 | A kind of manufacturing process of cylindrical work pieces |
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