CN110539128A - Preparation process of turbocharger intermediate shell - Google Patents
Preparation process of turbocharger intermediate shell Download PDFInfo
- Publication number
- CN110539128A CN110539128A CN201910669453.6A CN201910669453A CN110539128A CN 110539128 A CN110539128 A CN 110539128A CN 201910669453 A CN201910669453 A CN 201910669453A CN 110539128 A CN110539128 A CN 110539128A
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- Prior art keywords
- middle shell
- temperature
- shell
- stress
- heating
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title claims description 9
- 238000004080 punching Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract 6
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
the invention discloses a process for preparing a turbocharger intermediate shell, which comprises the steps of stamping, punching a low-alloy high-strength steel raw material for preparing the intermediate shell in a plurality of different types of dies for a plurality of times, punching the intermediate shell from which burrs and fins are removed by a punching die, polishing an installation hole with the fins for the second time, removing the surface stress of the intermediate shell, putting the intermediate shell into corrosion-resistant treatment liquid, putting the intermediate shell into phosphating liquid with the mass fraction of 18-21% to form a phosphating layer on the surface of a base film, and finally coating the surface of the intermediate shell with the phosphating layer completely. The overall supercharging effect of the turbocharger is stronger.
Description
Technical Field
the invention belongs to the field of preparation processes, and particularly relates to a preparation process of a turbocharger intermediate shell.
Background
A turbocharger is characterized in that the inertia impulse force of exhaust gas exhausted by an engine is utilized to push a turbine in a turbine chamber, the turbine drives a coaxial impeller, the impeller pumps air sent by an air filter pipeline to enable the air to be pressurized to enter a cylinder, a middle shell is actually a bearing box, and shaft parts such as a turbine shaft, a floating bearing, a thrust bearing, a fixed sleeve shaft seal and the like are all arranged in the middle shell.
disclosure of Invention
The invention mainly aims to provide a preparation process of a middle shell of a turbocharger, which can effectively solve the problems in the background art.
in order to achieve the purpose, the invention adopts the technical scheme that:
A preparation process of a turbocharger intermediate housing comprises the following steps:
the method comprises the following steps of firstly, stamping, namely, stamping the raw material low-alloy high-strength steel for preparing the middle shell in various types of dies for multiple times to obtain a formed middle shell, taking out the stamped middle shell in the dies, shaping the stamped middle shell, and removing the flash and burr of the stamped middle shell;
Punching the intermediate shell with the flash and the burr removed through a punching die to enable the intermediate shell to be provided with a plurality of mounting holes;
Polishing, namely polishing the mounting hole with the burrs for the second time to remove the burrs and the burrs of the mounting hole of the middle shell;
Step four, removing the surface stress of the middle shell, heating the middle shell to a stress removal temperature, keeping the heating temperature unchanged after heating to the stress removal temperature for 2-3h, cooling the temperature of the middle shell from the stress removal temperature to a preset temperature at a first preset cooling speed, reducing the temperature of the middle shell from the preset temperature to the normal temperature at a second preset cooling speed, and removing the surface stress of the middle shell;
and step five, performing anticorrosion treatment, namely placing the middle shell into anticorrosion treatment liquid, heating to 150-216 ℃ to form a base film on the surface of the middle shell, taking out the middle shell with the base film, placing the middle shell into phosphating solution with the mass fraction of 18-21% to form a phosphating layer on the surface of the base film, and finally coating the surface of the middle shell with the phosphating layer.
Preferably, the stamping pressure of the die in the step one is 13-18MPa, the temperatures of the upper die and the lower die of the die are controlled between 20-46 ℃, and the pressure maintaining time is controlled between 50-90 s.
preferably, the stress relief in step four is carried out at a temperature of 80 ℃/min, and the temperature rise is stopped until the temperature reaches 1860 ℃.
Preferably, the predetermined temperature is 1020 ℃.
Preferably, the first preset cooling speed is 40 ℃/min.
Preferably, the second cooling rate is 60 ℃/min.
Compared with the prior art, the invention has the following beneficial effects: according to the preparation process of the turbocharger intermediate housing, the metal nonstandard part treated by the preparation process has strong corrosion resistance, and meanwhile, the surface stress is completely released through surface stress treatment, so that the connection tightness between the intermediate housing and other parts in the turbocharger is improved, and the overall supercharging effect of the turbocharger is stronger.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
A turbocharger middle shell is prepared by placing raw material low-alloy high-strength steel for preparing the middle shell in a plurality of different types of dies, controlling the stamping pressure of the dies to be 13-18MPa, controlling the temperatures of an upper die and a lower die of the dies to be 20-46 ℃, controlling the pressure maintaining time to be 50-90s, performing multiple stamping forming to obtain a formed middle shell, taking out the stamping formed middle shell in the dies, shaping the stamping formed middle shell, and removing the flash and burr of the stamping formed middle shell; punching the intermediate shell with the flash and the burr removed through a punching die to enable the intermediate shell to be provided with a plurality of mounting holes; polishing the mounting hole with the burrs for the second time, and removing the burrs and the burrs of the mounting hole of the middle shell; removing the surface stress of the middle shell, heating the middle shell to a stress removal temperature, keeping the heating temperature unchanged after heating to the stress removal temperature, keeping the duration of the heating time to be 2-3h, reducing the temperature of the middle shell from the stress removal temperature to a preset temperature according to a first preset temperature reduction speed, reducing the temperature of the middle shell from the preset temperature to the normal temperature according to a second preset temperature reduction speed, raising the temperature of the stress removal at a temperature of 80 ℃/min until the temperature reaches 1860 ℃, stopping raising the temperature at the preset temperature of 1020 ℃, wherein the first preset temperature reduction speed is 40 ℃/min, and the second temperature reduction speed is 60 ℃/min, and removing the surface stress of the middle shell; the middle shell is placed into corrosion-resistant treatment liquid, then heated to 150-216 ℃ to form a base film on the surface of the middle shell, the middle shell with the base film is taken out, then placed into phosphating liquid with the mass fraction of 18-21% to form a phosphating layer on the surface of the base film, and finally the surface of the middle shell is fully coated with the phosphating layer.
Example 1
Placing the raw material low-alloy high-strength steel for preparing the middle shell in various types of dies, controlling the stamping pressure of the dies to be 13MPa, controlling the temperatures of an upper die and a lower die of the dies to be 20 ℃, controlling the pressure maintaining time to be 50s, performing multiple stamping forming to obtain a formed middle shell, taking out the stamped middle shell in the dies, shaping the stamped middle shell, and simultaneously removing the flash and the burr of the stamped middle shell; punching the intermediate shell with the flash and the burr removed through a punching die to enable the intermediate shell to be provided with a plurality of mounting holes; polishing the mounting hole with the burrs for the second time, and removing the burrs and the burrs of the mounting hole of the middle shell; removing the surface stress of the middle shell, heating the middle shell to a stress removal temperature, keeping the heating temperature unchanged after heating to the stress removal temperature, keeping the duration of 2h, reducing the temperature of the middle shell from the stress removal temperature to a preset temperature at a first preset temperature reduction speed, reducing the temperature of the middle shell from the preset temperature to the normal temperature at a second preset temperature reduction speed, raising the temperature of the stress removal at a temperature of 80 ℃/min, stopping raising the temperature until the temperature reaches 1860 ℃, keeping the preset temperature at 1020 ℃, keeping the first preset temperature reduction speed at 40 ℃/min, keeping the second temperature reduction speed at 60 ℃/min, and removing the surface stress of the middle shell; placing the middle shell into corrosion-resistant treatment liquid, heating to 150 ℃ to form a base film on the surface of the middle shell, taking out the middle shell with the base film, placing the middle shell into phosphating liquid with the mass fraction of 18% to form a phosphating layer on the surface of the base film, and finally coating the surface of the middle shell with the phosphating layer;
through detection, the surface stress of the prepared middle shell is 38N/mm (the surface stress of the low-alloy high-strength steel is 288N/mm), and the surface stress of the prepared middle shell is obviously reduced;
furthermore, the prepared middle shell is respectively placed in an acid solution and an alkaline solution with pH values of 5 and 9, the middle shell is taken out for two hours, the solutions are wiped off, the surface of the middle shell is not corroded, and the quality of the middle shell before and after the middle shell is placed is the same.
example 2
Placing the raw material low-alloy high-strength steel for preparing the middle shell in various types of dies, controlling the stamping pressure of the dies to be 18MPa, controlling the temperatures of an upper die and a lower die of the dies to be 46 ℃, controlling the pressure maintaining time to be 90s, performing multiple stamping forming to obtain a formed middle shell, taking out the stamped middle shell in the dies, shaping the stamped middle shell, and simultaneously removing the flash and the burr of the stamped middle shell; punching the intermediate shell with the flash and the burr removed through a punching die to enable the intermediate shell to be provided with a plurality of mounting holes; polishing the mounting hole with the burrs for the second time, and removing the burrs and the burrs of the mounting hole of the middle shell; removing the surface stress of the middle shell, heating the middle shell to a stress removal temperature, keeping the heating temperature unchanged after heating to the stress removal temperature, keeping the duration of the heating time to be 3h, reducing the temperature of the middle shell from the stress removal temperature to a preset temperature according to a first preset temperature reduction speed, reducing the temperature of the middle shell from the preset temperature to the normal temperature according to a second preset temperature reduction speed, raising the temperature of the stress removal at the temperature of 80 ℃/min, stopping raising the temperature until the temperature reaches 1860 ℃, keeping the preset temperature at 1020 ℃, keeping the first preset temperature reduction speed at 40 ℃/min, keeping the second temperature reduction speed at 60 ℃/min, and removing the surface stress of the middle shell; placing the middle shell into corrosion-resistant treatment liquid, heating to 216 ℃ to form a base film on the surface of the middle shell, taking out the middle shell with the base film, placing the middle shell into phosphating liquid with the mass fraction of 21% to form a phosphating layer on the surface of the base film, and finally coating the surface of the middle shell with the phosphating layer;
Through detection, the surface stress of the prepared middle shell is 29N/mm (the surface stress of the low-alloy high-strength steel is 288N/mm), and the surface stress of the prepared middle shell is obviously reduced;
Furthermore, the prepared middle shell is respectively placed in an acid solution and an alkaline solution with pH values of 4 and 10, the middle shell is taken out after two hours, the solution is wiped off, the surface of the middle shell is not corroded, and the quality of the middle shell before and after the middle shell is placed is the same.
the foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A preparation process of a middle shell of a turbocharger is characterized by comprising the following steps:
The method comprises the following steps of firstly, stamping, namely, stamping the raw material low-alloy high-strength steel for preparing the middle shell in various types of dies for multiple times to obtain a formed middle shell, taking out the stamped middle shell in the dies, shaping the stamped middle shell, and removing the flash and burr of the stamped middle shell;
Punching the intermediate shell with the flash and the burr removed through a punching die to enable the intermediate shell to be provided with a plurality of mounting holes;
polishing, namely polishing the mounting hole with the burrs for the second time to remove the burrs and the burrs of the mounting hole of the middle shell;
step four, removing the surface stress of the middle shell, heating the middle shell to a stress removal temperature, keeping the heating temperature unchanged after heating to the stress removal temperature for 2-3h, cooling the temperature of the middle shell from the stress removal temperature to a preset temperature at a first preset cooling speed, reducing the temperature of the middle shell from the preset temperature to the normal temperature at a second preset cooling speed, and removing the surface stress of the middle shell;
And step five, performing anticorrosion treatment, namely placing the middle shell into anticorrosion treatment liquid, heating to 150-216 ℃ to form a base film on the surface of the middle shell, taking out the middle shell with the base film, placing the middle shell into phosphating solution with the mass fraction of 18-21% to form a phosphating layer on the surface of the base film, and finally coating the surface of the middle shell with the phosphating layer.
2. The process for manufacturing an intermediate housing for a turbocharger according to claim 1, wherein: in the first step, the stamping pressure of the middle die is 13-18MPa, the temperatures of the upper die and the lower die of the die are controlled between 20-46 ℃, and the pressure maintaining time is controlled between 50-90 s.
3. The process for manufacturing an intermediate housing for a turbocharger according to claim 1, wherein: in the fourth step, the stress is removed, the temperature is raised at the temperature of 80 ℃/min, and the temperature is stopped until the temperature reaches 1860 ℃.
4. The process for manufacturing an intermediate housing for a turbocharger according to claim 1, wherein: the predetermined temperature is 1020 ℃.
5. the process for manufacturing an intermediate housing for a turbocharger according to claim 1, wherein: the first preset cooling speed is 40 ℃/min.
6. the process for manufacturing an intermediate housing for a turbocharger according to claim 1, wherein: the second cooling speed is 60 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910669453.6A CN110539128A (en) | 2019-07-24 | 2019-07-24 | Preparation process of turbocharger intermediate shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910669453.6A CN110539128A (en) | 2019-07-24 | 2019-07-24 | Preparation process of turbocharger intermediate shell |
Publications (1)
| Publication Number | Publication Date |
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| CN110539128A true CN110539128A (en) | 2019-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910669453.6A Pending CN110539128A (en) | 2019-07-24 | 2019-07-24 | Preparation process of turbocharger intermediate shell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451393A (en) * | 2020-03-20 | 2020-07-28 | 苏州辉图精密工业有限公司 | Nitrogen spring stamping process |
| CN111906551A (en) * | 2020-09-08 | 2020-11-10 | 江苏华培动力科技有限公司 | Automatic machining system and machining method for turbocharger middle shell machine |
| CN114559223A (en) * | 2022-03-23 | 2022-05-31 | 惠州市国丰达五金制品有限公司 | Manufacturing method of metal power supply shell |
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| EP2384848B1 (en) * | 2010-05-04 | 2012-09-05 | Benteler Automobiltechnik GmbH | Method for manufacturing a turbocharger housing |
| CN105127682A (en) * | 2015-08-21 | 2015-12-09 | 黄重九 | Machining method of internal tooth washer |
| CN107267735A (en) * | 2017-06-29 | 2017-10-20 | 太仓市钧胜轧辊有限公司 | A kind of annealing process for roll |
| CN107552628A (en) * | 2017-07-31 | 2018-01-09 | 枣庄运达机床有限公司 | A kind of carbon steel material automobile wheel edge shell manufacturing process |
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2019
- 2019-07-24 CN CN201910669453.6A patent/CN110539128A/en active Pending
Patent Citations (5)
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| CN101476097A (en) * | 2009-02-04 | 2009-07-08 | 宝鸡市巨成钛业有限责任公司 | Process for manufacturing high precision titanium starting sheet |
| EP2384848B1 (en) * | 2010-05-04 | 2012-09-05 | Benteler Automobiltechnik GmbH | Method for manufacturing a turbocharger housing |
| CN105127682A (en) * | 2015-08-21 | 2015-12-09 | 黄重九 | Machining method of internal tooth washer |
| CN107267735A (en) * | 2017-06-29 | 2017-10-20 | 太仓市钧胜轧辊有限公司 | A kind of annealing process for roll |
| CN107552628A (en) * | 2017-07-31 | 2018-01-09 | 枣庄运达机床有限公司 | A kind of carbon steel material automobile wheel edge shell manufacturing process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451393A (en) * | 2020-03-20 | 2020-07-28 | 苏州辉图精密工业有限公司 | Nitrogen spring stamping process |
| CN111906551A (en) * | 2020-09-08 | 2020-11-10 | 江苏华培动力科技有限公司 | Automatic machining system and machining method for turbocharger middle shell machine |
| CN114559223A (en) * | 2022-03-23 | 2022-05-31 | 惠州市国丰达五金制品有限公司 | Manufacturing method of metal power supply shell |
| CN114559223B (en) * | 2022-03-23 | 2023-05-30 | 惠州市国丰达五金制品有限公司 | Manufacturing method of metal power supply shell |
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Application publication date: 20191206 |
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