CN117862422A - Turbine shell and processing technology thereof - Google Patents
Turbine shell and processing technology thereof Download PDFInfo
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- CN117862422A CN117862422A CN202311686492.XA CN202311686492A CN117862422A CN 117862422 A CN117862422 A CN 117862422A CN 202311686492 A CN202311686492 A CN 202311686492A CN 117862422 A CN117862422 A CN 117862422A
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- Prior art keywords
- sand core
- turbine shell
- turbine
- water cavity
- shell
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- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005266 casting Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000003801 milling Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000013500 performance material Substances 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 claims description 16
- 238000005498 polishing Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007517 polishing process Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 229910000601 superalloy Inorganic materials 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Supercharger (AREA)
Abstract
The invention belongs to the technical field of turbine shells, and particularly relates to a turbine shell and a processing technology thereof, wherein a special performance material is selected as a basic material for preparing the turbine shell, and then the raw material is cut by a sawing machine according to the required size; rough milling is carried out on the cut raw materials, and automatic machining is carried out through a CNC machine tool; then, casting is started, after a large plane is selected to face downwards, the original upper water cavity sand core is changed into a lower water cavity sand core, when molten iron is filled to the bottom plane of the lower water cavity sand core in the casting process, the buoyancy generated by the lower water cavity sand core can be reduced, the water cavity sand core cannot be broken, and gas generated by the sand core can be smoothly discharged from an air passage without choking fire; the bottom pouring system is adopted, so that the liquid level rises steadily, vortex is reduced, cavity gas is smoothly discharged, and the casting can be poured and formed smoothly by selecting a large-plane downward process scheme.
Description
Technical Field
The invention relates to the technical field of turbine shells, in particular to a turbine shell and a processing technology thereof.
Background
The importance of the turbine shell, which is the external firmware of the turbocharger, is self-evident as it is the main component of the turbocharger, which acts as a cavity for the working of the turbine, guides the inlet and outlet air flow, supports the turbine shaft and the turbine rotating assembly, and is an integrally fixed matrix, as the turbocharging technology is becoming more and more widely used in the automotive engine field.
The turbine shell structure generally includes an air inlet end, an air outlet end and an internal cavity, wherein, in order to facilitate the connection of pipelines, the end faces of the air outlet end and the air inlet end of the turbine shell are integrally cast with bosses, mounting holes are formed around the bosses, the turbine shell is required to be made of high-temperature alloy because the turbine works at high temperature and high speed, in addition, the turbine shell is usually molded in a casting mode because the turbine shell is complex in shape, the turbine shell is provided with the mounting holes after casting, and then polishing and deburring treatment is required to be carried out on the end faces, and then the processing of the turbine shell can be completed by quality inspection.
When molten iron rises to the plane of the water feeding cavity in the casting process, large buoyancy is generated, the sand core of the water feeding cavity is caused to be broken, the broken sand core burns under the action of high-temperature molten iron to generate a large amount of gas, an air outlet channel arranged in the sand core is blocked by the high-temperature molten iron, the gas generated by the sand core cannot be discharged from the air channel, more and more gas is generated along with the baking of the high-temperature molten iron on an organic binder in the sand core, large gas pressure is formed, the high-pressure gas cannot be discharged from the air channel, only the high-pressure gas can be discharged from the molten iron, the molten iron is caused to be severely boiled, choking fire is generated, and once the choking fire occurs, a casting cannot be cast into a shape, and therefore, a turbine shell and a processing technology thereof are proposed by the skilled person.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a processing technology of a turbine shell, which comprises the following steps:
s1, selecting a special performance material as a basic material for preparing a turbine shell, and then cutting the raw material by a sawing machine according to the required size;
s2, rough milling is carried out on the cut raw materials, and automatic machining is carried out through a CNC machine tool;
s3: then, casting is started, after a large plane is selected to face downwards, the original upper water cavity sand core is changed into a lower water cavity sand core, when molten iron is filled to the bottom plane of the lower water cavity sand core in the casting process, the buoyancy generated by the lower water cavity sand core can be reduced, the water cavity sand core cannot be broken, and gas generated by the sand core can be smoothly discharged from an air passage without choking fire;
s4, adopting a bottom pouring system to enable the liquid level to rise smoothly, reducing vortex and smoothly discharging cavity gas;
s5: the cast turbine shell is rapidly cooled, so that the temperature difference in the cooling process is increased, the cooling speed is increased, and the material is reinforced and ground;
s6: milling is performed next, which is to shape the geometric shape that meets the requirements to ensure good fit with other components on the housing;
s7, carrying out planarization treatment, milling to leave a convex part on the surface, and flattening the convex part by processing a special drill bit to enable the surface to be flat;
s8: hole processing is carried out on the shell and the contact surface of the shell and the accessory;
s9: polishing the end face of the turbine shell, performing deburring treatment, and adsorbing scraps generated by polishing by utilizing a dust collection unit in the end face polishing process to prevent the scraps from entering the inner cavity of the turbine shell;
s10: and finally, performing quality detection and inspection, including appearance dimensional accuracy and shell quenching quality, so as to ensure that the machined turbine shell meets the use requirements of the turbocharger.
Preferably, the special performance material in S1 is one of a superalloy material or a special cast iron.
Preferably, in the step S4, three process holes are formed in the sand core plane of the oil cavity to remove air in the cavity of the oil cavity, and four strain relief heads are arranged on the top surface of the casting.
Preferably, the strain relief head adopts two annular wedge blocks, so that the gas can be smoothly discharged and the partial feeding effect of the turbine end can be realized.
Preferably, in the step S8, a large amount of hole processing is required, and the hole size, number and position are accurate.
Preferably, in S9, the dust collection unit adopts a plurality of dust collection heads, so that dust is collected from the polishing position outside the turbine shell, and the dust is also sucked from the processing hole penetrating into the turbine shell, so as to ensure that scraps cannot enter the inner cavity of the turbine shell.
The turbine shell is manufactured through the processing technology of the turbine shell and comprises a turbine shell body, wherein an air inlet end and an air outlet end are arranged on the turbine shell body, an end face boss is integrally cast on the air inlet end, and a mounting hole is formed in the end face boss.
The invention has the beneficial effects that:
1. according to the invention, by selecting a technological scheme that the large plane faces downwards, the original upper water cavity sand core is changed into the lower water cavity sand core, when molten iron is filled to the bottom plane of the lower water cavity sand core in the casting process, the buoyancy generated by the lower water cavity sand core is greatly reduced, the water cavity sand core is not broken, and the gas generated by the sand core can be smoothly discharged from the air passage without choking fire, so that the casting can be smoothly cast and formed.
2. When the end face of the turbine shell is polished and deburred, the dust collection unit is used for adsorbing scraps generated by polishing, so that the scraps are prevented from entering the inner cavity of the turbine shell, and the problem that the scraps with complex inner cavity structure of the turbine shell are difficult to clean is avoided.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a turbine shell structure of the present invention.
In the figure: 1. a turbine housing shell; 2. an air inlet end; 3. an air outlet end; 4. an end face boss; 5. and (5) mounting holes.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a turbine shell comprises a turbine shell body 1, wherein an air inlet end 2 and an air outlet end 3 are arranged on the turbine shell body 1, an end face boss 4 is integrally cast on the air inlet end 2, a mounting hole 5 is formed in the end face boss 4, a special performance material is selected as a basic material for preparing the turbine shell in the processing technology of the turbine shell, the special performance material is one of a high-temperature alloy material and a special cast iron, and then a sawing machine is used for cutting raw materials according to the required size; rough milling is carried out on the cut raw materials, and automatic machining is carried out through a CNC machine tool; then, casting is started, after a large plane is selected to face downwards, the original upper water cavity sand core is changed into a lower water cavity sand core, when molten iron is filled to the bottom plane of the lower water cavity sand core in the casting process, the buoyancy generated by the lower water cavity sand core can be reduced, the water cavity sand core cannot be broken, and gas generated by the sand core can be smoothly discharged from an air passage without choking fire; the bottom pouring system is adopted, so that the liquid level rises steadily, vortex is reduced, and the cavity gas is smoothly discharged; three process holes are formed in the plane of the oil cavity sand core to remove oil cavity gas, four strain relief heads are arranged on the top surface of the casting, two annular wedge blocks are adopted for the strain relief heads, and the effect of feeding the turbine end part while smoothly discharging gas is ensured. The cast turbine shell is rapidly cooled, so that the temperature difference in the cooling process is increased, the cooling speed is increased, and the material is reinforced and ground; milling is performed next, which is to shape the geometric shape that meets the requirements to ensure good fit with other components on the housing; carrying out planarization treatment, milling to leave a convex part on the surface, and flattening the convex part by processing a special drill bit to ensure that the surface is flat; hole processing is carried out on the shell and the contact surface of the shell and the accessory; a large number of holes are required to be machined, the size, the number and the positions of the holes are accurate and have no error, the end face of the turbine shell is polished, deburring treatment is carried out, and waste scraps generated by polishing are adsorbed by utilizing a dust collection unit in the end face polishing process, so that the waste scraps are prevented from entering the inner cavity of the turbine shell; the dust collection unit adopts a plurality of dust collection heads, dust collection is carried out from the polishing position outside the turbine shell, dust is absorbed by penetrating into the turbine shell from the processing hole, so that waste scraps are prevented from entering the inner cavity of the turbine shell, and finally, quality detection and inspection are carried out, wherein the quality detection and inspection comprises appearance size precision and shell quenching quality, and the processed turbine shell is ensured to meet the use requirement of the turbocharger.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (7)
1. The processing technology of the turbine shell is characterized by comprising the following steps of:
s1, selecting a special performance material as a basic material for preparing a turbine shell, and then cutting the raw material by a sawing machine according to the required size;
s2, rough milling is carried out on the cut raw materials, and automatic machining is carried out through a CNC machine tool;
s3: then, casting is started, after a large plane is selected to face downwards, the original upper water cavity sand core is changed into a lower water cavity sand core, when molten iron is filled to the bottom plane of the lower water cavity sand core in the casting process, the buoyancy generated by the lower water cavity sand core can be reduced, the water cavity sand core cannot be broken, and gas generated by the sand core can be smoothly discharged from an air passage without choking fire;
s4, adopting a bottom pouring system to enable the liquid level to rise smoothly, reducing vortex and smoothly discharging cavity gas;
s5: the cast turbine shell is rapidly cooled, so that the temperature difference in the cooling process is increased, the cooling speed is increased, and the material is reinforced and ground;
s6: milling is performed next, which is to shape the geometric shape that meets the requirements to ensure good fit with other components on the housing;
s7, carrying out planarization treatment, milling to leave a convex part on the surface, and flattening the convex part by processing a special drill bit to enable the surface to be flat;
s8: hole processing is carried out on the shell and the contact surface of the shell and the accessory;
s9: polishing the end face of the turbine shell, performing deburring treatment, and adsorbing scraps generated by polishing by utilizing a dust collection unit in the end face polishing process to prevent the scraps from entering the inner cavity of the turbine shell;
s10: and finally, performing quality detection and inspection, including appearance dimensional accuracy and shell quenching quality, so as to ensure that the machined turbine shell meets the use requirements of the turbocharger.
2. The process for machining a turbine shell according to claim 1, wherein the special performance material in S1 is one of a superalloy material or a special cast iron.
3. The process for machining the turbine shell according to claim 1, wherein three process holes are formed in the sand core plane of the oil cavity in the step S4 to remove oil cavity gas, and four strain relief heads are formed in the top surface of the casting.
4. A process according to claim 3, wherein the strain relief head comprises two annular wedges to ensure smooth gas discharge while providing partial feed to the turbine end.
5. The process of claim 1, wherein a large number of holes are required in S8, and the hole size, number and position are accurate.
6. The process of claim 1, wherein the dust collection unit in S9 employs a plurality of dust collection heads, so that dust is collected from the grinding position outside the turbine housing, and the dust is also sucked from the processing hole penetrating into the turbine housing, so as to ensure that scraps do not enter the inner cavity of the turbine housing.
7. A turbine shell manufactured by the processing technology of the turbine shell according to any one of claims 1 to 6, which is characterized by comprising a turbine shell body (1), wherein an air inlet end (2) and an air outlet end (3) are arranged on the turbine shell body (1), an end face boss (4) is integrally cast on the air inlet end (2), and a mounting hole (5) is formed in the end face boss (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311686492.XA CN117862422A (en) | 2023-12-08 | 2023-12-08 | Turbine shell and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311686492.XA CN117862422A (en) | 2023-12-08 | 2023-12-08 | Turbine shell and processing technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117862422A true CN117862422A (en) | 2024-04-12 |
Family
ID=90589158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311686492.XA Pending CN117862422A (en) | 2023-12-08 | 2023-12-08 | Turbine shell and processing technology thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117862422A (en) |
-
2023
- 2023-12-08 CN CN202311686492.XA patent/CN117862422A/en active Pending
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