CN107088645B - Casting mold for solving shrinkage porosity inside pressure shell - Google Patents
Casting mold for solving shrinkage porosity inside pressure shell Download PDFInfo
- Publication number
- CN107088645B CN107088645B CN201710373060.1A CN201710373060A CN107088645B CN 107088645 B CN107088645 B CN 107088645B CN 201710373060 A CN201710373060 A CN 201710373060A CN 107088645 B CN107088645 B CN 107088645B
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- shell
- pressing
- casting
- pouring gate
- riser
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- 238000005266 casting Methods 0.000 title claims abstract description 32
- 238000003825 pressing Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 235000000396 iron Nutrition 0.000 claims description 3
- 238000007723 die pressing method Methods 0.000 claims 2
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 230000003031 feeding effect Effects 0.000 abstract description 2
- 238000005058 metal casting Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
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- 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
- B22C9/088—Feeder heads
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Supercharger (AREA)
Abstract
The invention relates to a casting mold for solving shrinkage porosity inside a pressure shell, and belongs to the technical field of metal casting. The casting mould comprises a volute casing pressing main body mould with a required internal cavity, wherein a vertical pouring gate with an opening at the upper end is arranged on the outer side of the casing pressing main body mould, and the vertical pouring gate is respectively communicated with inner pouring gates of two casing pressing main body moulds through horizontal pouring gates extending towards two sides; the inner pouring gate is communicated with the radial inlets of the main die of the pressing shell after passing through the feed end dead head with an upward opening, and two conformal chillers positioned on the upper surface of the disc of the main die of the pressing shell are arranged between the two radial inlets; one side of the pressing shell main body die, which is far away from the vertical pouring gate, is provided with a heating riser extending upwards through the necking down, and an arc-shaped chill is arranged between the necking down of the heating riser and the upper surface of the pressing shell main body die disc. The invention can ensure that the riser can carry out maximum feeding on the thick and large part in the casting, avoids the feeding effect of the heating riser caused by early solidification of the riser neck due to overlarge size, and can prevent the casting from air leakage caused by shrinkage porosity of the pipe wall of the pressure shell.
Description
Technical Field
The invention relates to a casting method, in particular to a casting mold for solving the problem of shrinkage porosity inside a pressure shell, and belongs to the technical field of metal casting.
Background
The pressure shell with the conventional structure of the turbocharger can be cast without shrinkage porosity in the pressure shell by adopting the traditional casting process, so that the requirement of leakage detection can be basically and completely suppressed. However, with the continuous development of turbocharger technology, some pressure shells with special structures (for example, the middle position of the pressure shell is thick and relatively isolated, and the wall thickness of a casting is thick) appear, which actually shows that the internal and pipe wall shrinkage porosity of the pressure shell cannot be completely eliminated by the traditional casting process.
Disclosure of Invention
The invention aims to: to the problems existing in the prior art, the casting mold capable of properly solving the shrinkage porosity inside the pressure shell is provided through structural improvement, so that the casting quality of the pressure shell with a thick inner structure is ensured.
In order to achieve the purpose, the casting mold for solving the shrinkage porosity inside the press shell comprises a volute-shaped press shell main body mold with a required internal cavity, wherein a vertical pouring gate with an opening at the upper end is arranged on the outer side of the press shell main body mold, and the vertical pouring gate is respectively communicated with two inner pouring gates facing the press shell main body mold through horizontal pouring gates extending towards two sides; the inner pouring gate is communicated with the radial inlets of the main die of the pressing shell after passing through the feed-end dead head with an upward opening, and two conformal chills (the chills are the terms used for chilling in the casting industry and can be made of any metal, even graphite and other composite materials with higher heat storage coefficient) are arranged on the upper surface of the disc of the main die of the pressing shell between the two radial inlets; one side of the pressing shell main body die, which is far away from the vertical pouring gate, is provided with a heating riser extending upwards through a necking down, and an arc-shaped chill is arranged between the necking down of the heating riser and the upper surface of the pressing shell main body die disc.
It is a further refinement of the invention that the ratio of the geometric modulus of the heating riser (geometric modulus: volume of casting/heat dissipation surface area) to the modulus at the site of the interior of the press shell where feeding is required is 1.2 ± 0.1:1 (preferably 1.2: 1).
It is a further refinement of the present invention that the arcuate chill has a thickness of 1/2-1/4 (preferably 1/3) of the diameter of the neck of the glow cap.
It is a further improvement of the present invention that the ratio of the geometric modulus of the feeder head to the modulus of the inside of the crush can at the site where feeding is required is 1.2 + -0.1: 1 (preferably 1.2: 1).
According to the invention, as the casting structure comprising the sprue, the cross runner, the ingate and the plurality of risers is skillfully and reasonably arranged, the heating riser can effectively prolong the molten iron solidification time at the position of the riser neck and perform feeding on the inside of the press shell, so that shrinkage porosity in the press shell is eliminated, and the riser is arranged at the optimal feeding channel, so that the riser can perform feeding on the thick part in the casting to the maximum extent; the properly arranged arc-shaped chilling block can prevent the surface of the casting from being shrunk and loosened due to overlarge heat section of the riser neck, and simultaneously avoid the phenomenon that the riser neck is solidified in advance due to overlarge size to influence the feeding effect of the heating riser; the two inlet end risers are used for feeding the pipe wall of the casting, and the two conformal cold irons arranged between the inlet end risers and the inlet end risers can shorten a feeding channel and prevent the pipe wall of the pressure shell from being shrunk to cause air leakage of the casting.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a bottom view of fig. 1.
Fig. 3 is a perspective view of fig. 1.
Detailed Description
Example one
The casting mould of the inside shrinkage porosity of pressure shell is solved to this embodiment is as shown in fig. 1, 2, 3, and the pressure shell main part mould 9 that has required inside die cavity is the volute form, and the outside that the spiral case export was kept away from to pressure shell main part mould 9 has upper end open-ended vertical watering 1, and this vertical watering 1 is watered 3 and is watered 4 intercommunications with two interior waters towards pressure shell main part mould 9 respectively through the level that extends towards both sides. Between the vertical pouring channel 1 and the horizontal pouring channel 3, a filter block 2 is passed. The two ingates 4 are respectively communicated with the radial inlet of the main die 9 of the pressing shell after passing through the inlet risers 5 and 11 which are opened upwards. The included angle of the two radial inlets is 120 degrees, and two arc-shaped conformal cold irons 8 and 10 which are respectively positioned on the upper surface of the disk of the main pressing shell body model 9 and are adjacent to the excircle are arranged between the two radial inlets. The ratio of the geometric modulus of the inlet riser 5 to the modulus of the inner portion of the press shell at the portion to be fed is 1.2. One side of the main die 9 of the pressing shell, which is far away from the vertical pouring gate 1, is provided with a heating riser 6 which extends upwards through necking, and the ratio of the geometric modulus of the heating riser 6 to the modulus of the part needing feeding in the pressing shell is 1.2. An arc-shaped chilling block 7 which is close to one 8 of the conformal chilling blocks is arranged between the necking of the heating riser 1 and the upper surface of the disc of the pressing shell main body die 9, and the thickness of the arc-shaped chilling block 7 is 1/3 of the diameter of the neck of the heating riser 6.
According to the casting structure, the heating risers are reasonably arranged on the disc surface in the middle of the pressure shell, and the heating risers are positioned at the optimal feeding passage, so that the feeding of the thick and large part in the casting can be ensured to the maximum extent; meanwhile, arc-shaped chills are arranged on the upper surfaces of the heating riser neck and the shell pressing disc, so that the shrinkage porosity of the upper surface of a casting caused by the overlarge heat junction of the riser neck can be prevented, and the influence of advanced solidification of the riser neck caused by the overlarge size of the chills on feeding can be prevented; in addition, two inlet end risers are arranged to feed the pipe wall of the casting, and the conformal cold iron between the two risers is used for shortening a feeding channel and preventing the pipe wall of the pressure shell from being loosened to cause air leakage of the casting.
Practice shows that by adopting the process structure of the embodiment, the problems of large and thick parts in the pressure shell with a special structure and shrinkage porosity generated on the pipe wall can be effectively solved, and the produced pressure shell casting has no obvious shrinkage porosity defect and completely meets the quality requirement.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (4)
1. The utility model provides a solve casting mould of the inside shrinkage porosity of pressure shell, includes the main phantom mould of volute pressure shell that has required inside die cavity, its characterized in that: the outer side of the main die shell pressing body is provided with a vertical pouring gate with an opening at the upper end, and the vertical pouring gate is respectively communicated with two inner pouring gates facing the main die shell pressing body through horizontal pouring gates extending towards two sides; the inner pouring gate is communicated with the radial inlets of the main die pressing shell after passing through the feed end dead head with an upward opening, and two conformal chillers positioned on the upper surface of the main die pressing shell disc are arranged between the two radial inlets; one side of the main die of the pressing shell, which is far away from the vertical pouring gate, is provided with a heating riser extending upwards through a necking down, and an arc-shaped chill is arranged between the necking down of the heating riser and the upper surface of the disc of the main die of the pressing shell; the thickness of the arc-shaped chilling block is 1/2-1/4 of the diameter of the neck of the heating riser; the included angle of the two radial inlets is 120 +/-5 degrees, and two arc-shaped conformal cold irons which are respectively positioned on the upper surface of the pressing shell main body die disc and are adjacent to the excircle are arranged between the two radial inlets.
2. The casting mold for solving the shrinkage porosity inside the press shell according to claim 1, wherein: the ratio of the geometric modulus of the heating riser to the modulus of the position needing feeding in the pressing shell is 1.2 +/-0.1: 1.
3. The casting mold for solving the shrinkage porosity inside the press shell according to claim 2, wherein: the ratio of the geometric modulus of the inlet riser to the modulus of the position needing feeding in the pressing shell is 1.2 +/-0.1: 1.
4. The casting mold for solving the shrinkage porosity inside the press shell according to claim 3, wherein: and a filter block is arranged between the vertical pouring gate and the horizontal pouring gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373060.1A CN107088645B (en) | 2017-05-24 | 2017-05-24 | Casting mold for solving shrinkage porosity inside pressure shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373060.1A CN107088645B (en) | 2017-05-24 | 2017-05-24 | Casting mold for solving shrinkage porosity inside pressure shell |
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| Publication Number | Publication Date |
|---|---|
| CN107088645A CN107088645A (en) | 2017-08-25 |
| CN107088645B true CN107088645B (en) | 2020-05-01 |
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| CN201710373060.1A Active CN107088645B (en) | 2017-05-24 | 2017-05-24 | Casting mold for solving shrinkage porosity inside pressure shell |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213323B (en) * | 2017-12-27 | 2020-05-15 | 广东富华铸锻有限公司 | Anti-loosening and shrinkage casting method for differential shell |
| CN108637179A (en) * | 2018-05-17 | 2018-10-12 | 西峡县众德汽车部件有限公司 | Casting device and the device for being used to prepare heat-resisting steel casting |
| CN110238346A (en) * | 2019-07-18 | 2019-09-17 | 成都艾特安科技有限公司 | The method of green casting vehicle turbocharger shell |
| CN110918939B (en) * | 2019-11-28 | 2021-06-04 | 阿路米（无锡）有限公司 | Forming die and forming method for aluminum alloy product with suspension ribs |
| CN112593147A (en) * | 2020-11-18 | 2021-04-02 | 遵义拓特铸锻有限公司 | Chemical pump shell and casting mold and casting method thereof |
| CN114101590A (en) * | 2021-12-07 | 2022-03-01 | 勤威(天津)工业有限公司 | Casting process model structure of exhaust pipe for forming two independent pipe cavities |
| CN114535510A (en) * | 2022-02-28 | 2022-05-27 | 无锡市蠡湖铸业有限公司 | Feeder head of volute casing casting and machining method of volute casing casting |
| CN114850405A (en) * | 2022-05-25 | 2022-08-05 | 扬州广润机械有限公司 | Casting process and casting mold for preventing shrinkage cavity of ductile iron flywheel shell casting of automobile engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4154289A (en) * | 1976-04-06 | 1979-05-15 | Marie-Therese Simian | Gating system |
| CN202129409U (en) * | 2011-05-31 | 2012-02-01 | 日月重工股份有限公司 | Pouring system |
| CN203140699U (en) * | 2013-03-08 | 2013-08-21 | 湖州中核苏阀一新铸造有限公司 | Rear axle housing steel casting die |
| CN204094057U (en) * | 2014-10-17 | 2015-01-14 | 日月重工股份有限公司 | For the cast structure of the cartridge housing foundry goods of Ship turbine booster |
| CN204975218U (en) * | 2015-09-22 | 2016-01-20 | 土平机械（江苏）有限公司 | Marine turbocharger shell mold |
| CN105880485A (en) * | 2016-07-04 | 2016-08-24 | 常州中车汽车零部件有限公司 | Turbine casing casting method |
| CN106583663B (en) * | 2016-12-22 | 2018-12-07 | 常州中车汽车零部件有限公司 | A kind of turbine case casting method |
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Address after: 213023 No.313, Wuyi Road, Jingkai District, Changzhou City, Jiangsu Province Patentee after: CRRC CHANGZHOU AUTO PARTS CO.,LTD. Country or region after: China Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Address before: No. 313 Wuyi Road, Economic Development Zone, Changzhou City, Jiangsu Province, China, 213023 Patentee before: CRRC CHANGZHOU AUTO PARTS CO.,LTD. Country or region before: China Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |
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