CN102764873A - Low-pressure casting process for turbocharger compressor casing - Google Patents
Low-pressure casting process for turbocharger compressor casing Download PDFInfo
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- CN102764873A CN102764873A CN201110112326XA CN201110112326A CN102764873A CN 102764873 A CN102764873 A CN 102764873A CN 201110112326X A CN201110112326X A CN 201110112326XA CN 201110112326 A CN201110112326 A CN 201110112326A CN 102764873 A CN102764873 A CN 102764873A
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Abstract
The invention discloses a low-pressure casting process for a turbocharger compressor casing. The low-pressure casting process includes the specific steps: firstly, sintering high-strength coated sand to make a core; secondly, casting aluminum alloy materials on a gravity casting machine at the casting temperature of 700-740 DEG C and under the inflation pressure of 1-3.8MPa; thirdly, removing flashes, burrs, pouring gates and the like of a casting; fourthly, heating the casting to reach the temperature of 535-545 DEG C and keeping the temperature for 2-3H to perform solution aging; fifthly, placing the casting into water at the temperature of 50-80 DEG C for manual quenching; sixthly, heating the casting to reach the temperature of 195-205 DEG C and keeping the temperature for 2-3H; seventhly, cooing the casting by air; and eighthly, performing shot blasting, polishing, machining, deoiling and cleaning. The turbocharger compressor casing produced by the casting process has a complicated internal structure, a thin uniform wall thickness and fine mechanical performances, cutting performances and mechanical properties.
Description
Technical field
The present invention relates to a kind of casting technique of turbocharger air compressor shell, particularly a kind of low-pressure casting process of turbocharger air compressor shell.
Background technology
The compressor casing of turbocharger is the important pressurized part on the turbocharger, increases aeration quantity thereby the waste gas that the exhaust gas turbocharge principle utilizes engine to discharge comes drives impeller to improve admission pressure through the shell compressed air of calming the anger.When engine speed speeds; The waste gas velocity of discharge and turbocompressor rotating speed also speed synchronously, and this moment, impeller just compressed in the more air entering compressor casing, and more air is pressed onto in the cylinder of engine; Engine fuel is fully burnt; Increase engine efficiency, produced bigger power, reduced toxic emission.And the admission pressure of increase engine mainly leans on engine-mounted exhaust-driven turbo-charger exhaust-gas turbo charger to realize.
Compressor casing in the turbocharger is the turbine vitals, along with the extensive use of automobile turbocharging technology, its structure, mechanical performance is required and higher requirement arranged service life.
The forging type of existing turbocharger air compressor shell is a gravitational casting.The product serviceability and the life-span of casting are low; Wall is thin, complex-shaped product is not easy moulding, adopts its mechanical property of turbocompressor shell of gravitational casting: tensile strength 200MPa, percentage elongation 3.5%; Hardness 75HB can not satisfy existing automobile power technology to the calm the anger requirement of shell of turbine.
Summary of the invention
In order to remedy above deficiency; The invention provides a kind of gravity foundry technology of turbocharger air compressor shell; The turbocharger air compressor shell mechanical performance of using the low-pressure casting process of this turbocharger air compressor shell to produce is high, long service life, and fraction defective is low.
The present invention for the technical scheme that solves its technical problem and adopt is: a kind of low-pressure casting process of turbocharger air compressor shell, and concrete steps are following:
Step 1: coremaking:
According to shape, the size of turbocharger air compressor shell inner flow passage, cover the husky sintering coremaking of mould with high strength;
Step 2: low pressure casting:
Institute's manufacturing mold core is packed in the air injection machine, aluminium alloy stock is injected in the core and on air injection machine cast 700～740 ℃ of pouring temperatures, the blowing pressure: 1～3.8MPa;
Step 3: cleaning foundry goods:
Cleaning casting fin, burr and cast gate etc.;
Step 4: quench and the timeliness processing:
Elder generation's solution timeliness: 535～545 ℃ of heating-up temperatures, temperature retention time 2～3H, quench then: 50～80 ℃ of water temperatures, carry out artificial aging then, 195～205 ℃ of heating-up temperatures, temperature retention time 2～3H, air cooling;
Step 5: shot-peening polishing:
With compressed air shotblasting machine and stainless steel ball shot-peening polishing;
Step 6: machined:
Foundry goods is carried out machined, process desired structure;
Step 7: the cleaning of deoiling:
Foundry goods is cleaned impurity such as the oil stain of removal surface attachment, break flour.
As further improvement of the present invention, in the step 1 high strength is covered sintering coremaking in the husky mould that injects on the neutron moulding machine of mould.
As further improvement of the present invention, in the step 2 cast used aluminium alloy stock be ZAlSi7Mg (ZL101) Birmasil (GB1173-86, the percentage by weight of each composition is: Si 6.5～7.5%; Mg 0.25～0.45%, Fe0.5%, Zn0.3%; Mn0.35%, the Al surplus).
As further improvement of the present invention, compressed air shotblasting machine described in the step 4 is the hook type compressed air shotblasting machine.
As further improvement of the present invention, used stainless steel ball diameter is 0.4mm in the step 4.
As further improvement of the present invention, earlier foundry goods is fixed on the anchor clamps in the step 5, and then is fixed on the CNC lathe, carry out machined through the CNC lathe.
As further improvement of the present invention, use supersonic wave cleaning machine in the step 6 to the foundry goods cleaning of deoiling.
Useful technique effect of the present invention is: use the present invention and can cast turbocharger air compressor shell complex-shaped, that wall is thin, fraction defective is low, and the turbocharger air compressor shell of casting has the favorable mechanical performance; With good machinability, its good mechanical performance, tensile strength >=280MPa; Yield strength >=280MPa, percentage elongation >=4%, hardness >=90HB; Metallographic is more than 3 grades; It is not fragile, and long service life meets in the Hyundai Motor turbocharging technology requirement to high-mechanical property.
Description of drawings
Fig. 1 is a flow chart of the present invention.
The specific embodiment
Embodiment:
A kind of low-pressure casting process of turbocharger air compressor shell, concrete steps are following:
Step 1: coremaking:
According to shape, the size of turbocharger air compressor shell inner flow passage, cover the husky sintering coremaking of mould with high strength;
Step 2: low pressure casting:
Institute's manufacturing mold core is packed in the air injection machine, aluminium alloy stock is injected in the core and on air injection machine cast 700～740 ℃ of pouring temperatures, the blowing pressure: 1～3.8MPa;
Step 3: cleaning foundry goods:
Cleaning casting fin, burr and cast gate etc.;
Step 4: quench and the timeliness processing:
Elder generation's solution timeliness: 535～545 ℃ of heating-up temperatures, temperature retention time 2～3H, quench then: 50～80 ℃ of water temperatures, carry out artificial aging then, 195～205 ℃ of heating-up temperatures, temperature retention time 2～3H, air cooling;
Step 5: shot-peening polishing:
With compressed air shotblasting machine and stainless steel ball shot-peening polishing;
Step 6: machined:
Foundry goods is carried out machined, process desired structure;
Step 7: the cleaning of deoiling:
Foundry goods is cleaned impurity such as the oil stain of removal surface attachment, break flour.
In the said step 1 high strength is covered sintering coremaking in the husky mould that injects on the neutron moulding machine of mould.
The used aluminium alloy stock of cast is ZAlSi7Mg (ZL101) Birmasil (GB1173-86, the percentage by weight of each composition is: Si6.5～7.5%, Mg 0.25～0.45%, Fe0.5%, Zn0.3%, Mn0.35%, Al surplus) in the said step 2.
Compressed air shotblasting machine described in the said step 4 is the hook type compressed air shotblasting machine.
Used stainless steel ball diameter is 0.4mm in the said step 4.
Earlier foundry goods is fixed on the anchor clamps in the said step 5, and then is fixed on the CNC lathe, carry out machined through the CNC lathe.
Use supersonic wave cleaning machine to the foundry goods cleaning of deoiling in the said step 6.
Claims (7)
1. the low-pressure casting process of a turbocharger air compressor shell, it is characterized by: concrete steps are following:
Step 1: coremaking:
According to shape, the size of turbocharger air compressor shell inner flow passage, cover the husky sintering coremaking of mould with high strength;
Step 2: low pressure casting:
Institute's manufacturing mold core is packed in the air injection machine, aluminium alloy stock is injected in the core and on air injection machine cast 700～740 ℃ of pouring temperatures, the blowing pressure: 1～3.8MPa;
Step 3: cleaning foundry goods:
Cleaning casting fin, burr and cast gate etc.;
Step 4: quench and the timeliness processing:
Elder generation's solution timeliness: 535～545 ℃ of heating-up temperatures, temperature retention time 2～3H, quench then: 50～80 ℃ of water temperatures, carry out artificial aging then, 195～205 ℃ of heating-up temperatures, temperature retention time 2～3H, air cooling;
Step 5: shot-peening polishing:
With compressed air shotblasting machine and stainless steel ball shot-peening polishing;
Step 6: machined:
Foundry goods is carried out machined, process desired structure;
Step 7: the cleaning of deoiling:
Foundry goods is cleaned impurity such as the oil stain of removal surface attachment, break flour.
2. the low-pressure casting process of turbocharger air compressor shell according to claim 1 is characterized by: in the step 1 high strength is covered sintering coremaking in the husky mould that injects on the neutron moulding machine of mould.
3. the low-pressure casting process of turbocharger air compressor shell according to claim 1 is characterized by: the used aluminium alloy stock of cast is ZAlSi7Mg (ZL101) Birmasil in the step 2.
4. the low-pressure casting process of turbocharger air compressor shell according to claim 1 is characterized by: compressed air shotblasting machine described in the step 4 is the hook type compressed air shotblasting machine.
5. the low-pressure casting process of turbocharger air compressor shell according to claim 1 is characterized by: used stainless steel ball diameter is 0.4mm in the step 4.
6. the low-pressure casting process of turbocharger air compressor shell according to claim 1 is characterized by: earlier foundry goods is fixed on the anchor clamps in the step 5, and then is fixed on the CNC lathe, carry out machined through the CNC lathe.
7. the low-pressure casting process of turbocharger air compressor shell according to claim 1 is characterized by: use supersonic wave cleaning machine to the foundry goods cleaning of deoiling in the step 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110112326XA CN102764873A (en) | 2011-05-03 | 2011-05-03 | Low-pressure casting process for turbocharger compressor casing |
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| CN201110112326XA CN102764873A (en) | 2011-05-03 | 2011-05-03 | Low-pressure casting process for turbocharger compressor casing |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182497A (en) * | 2013-04-26 | 2013-07-03 | 常州市蓝托金属制品有限公司 | Machining method of industrial robot radiator |
| CN103192239A (en) * | 2013-04-26 | 2013-07-10 | 常州市蓝托金属制品有限公司 | Processing method of industrial robot protecting cover |
| CN103231013A (en) * | 2013-04-22 | 2013-08-07 | 宁波合力模具科技股份有限公司 | Transmission housing pouring method and sand casting mould used in transmission housing pouring method |
| CN103334034A (en) * | 2013-06-14 | 2013-10-02 | 宁波科达制动器制造有限公司 | Preparation method of gas compressor volute of turbocharger |
| CN104190876A (en) * | 2014-08-29 | 2014-12-10 | 无锡柯马机械有限公司 | Casting process for turbocharger compressor shell |
| CN104550827A (en) * | 2013-10-18 | 2015-04-29 | 丹阳市米可汽车零部件厂 | Oil pan machining process |
| CN103599906B (en) * | 2013-11-15 | 2015-08-26 | 西安航空动力股份有限公司 | Micro-Aviation Engine rectifier assembly water passage surface method for cleaning |
| CN105170944A (en) * | 2015-09-17 | 2015-12-23 | 天津市信通机械设备制造有限公司 | Low-pressure casting method for compressor body |
| CN105382239A (en) * | 2015-12-21 | 2016-03-09 | 常熟市制冷压缩机铸件厂 | Aluminum compressor housing of refrigerator |
| CN106077504A (en) * | 2016-06-29 | 2016-11-09 | 昆山邦泰汽车零部件制造有限公司 | A kind of deep working method of industrial robot protecting cover |
| CN108448765A (en) * | 2017-02-16 | 2018-08-24 | 福特全球技术公司 | The method of the magnetic characteristic of electrician's steel core for adjusting electric device |
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| US4252173A (en) * | 1976-02-03 | 1981-02-24 | Societe De Vente De L'aluminium Pechiney | Low-pressure moulding process and apparatus |
| CN1386602A (en) * | 2001-12-13 | 2002-12-25 | 赵强 | Low-pressure technology for casting Al-Cu alloy part with metal mould |
| CN101050512A (en) * | 2006-04-03 | 2007-10-10 | 郑州大学 | High effective heat treatment method for wheel hub founded at low pressure from high performance A356 alloy |
| CN101844218A (en) * | 2009-03-28 | 2010-09-29 | 王宏波 | Low pressure casting process for aluminum alloy cylinder part |
| CN101885051A (en) * | 2010-07-16 | 2010-11-17 | 天津市奥亚机电有限公司 | Aluminum alloy low-pressure casting process for transfer case housing of concrete pump truck |
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2011
- 2011-05-03 CN CN201110112326XA patent/CN102764873A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4252173A (en) * | 1976-02-03 | 1981-02-24 | Societe De Vente De L'aluminium Pechiney | Low-pressure moulding process and apparatus |
| CN1386602A (en) * | 2001-12-13 | 2002-12-25 | 赵强 | Low-pressure technology for casting Al-Cu alloy part with metal mould |
| CN101050512A (en) * | 2006-04-03 | 2007-10-10 | 郑州大学 | High effective heat treatment method for wheel hub founded at low pressure from high performance A356 alloy |
| CN101844218A (en) * | 2009-03-28 | 2010-09-29 | 王宏波 | Low pressure casting process for aluminum alloy cylinder part |
| CN101885051A (en) * | 2010-07-16 | 2010-11-17 | 天津市奥亚机电有限公司 | Aluminum alloy low-pressure casting process for transfer case housing of concrete pump truck |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231013A (en) * | 2013-04-22 | 2013-08-07 | 宁波合力模具科技股份有限公司 | Transmission housing pouring method and sand casting mould used in transmission housing pouring method |
| CN103231013B (en) * | 2013-04-22 | 2015-01-21 | 宁波合力模具科技股份有限公司 | Transmission housing pouring method and sand casting mould used in transmission housing pouring method |
| CN103182497A (en) * | 2013-04-26 | 2013-07-03 | 常州市蓝托金属制品有限公司 | Machining method of industrial robot radiator |
| CN103192239A (en) * | 2013-04-26 | 2013-07-10 | 常州市蓝托金属制品有限公司 | Processing method of industrial robot protecting cover |
| CN103334034A (en) * | 2013-06-14 | 2013-10-02 | 宁波科达制动器制造有限公司 | Preparation method of gas compressor volute of turbocharger |
| CN103334034B (en) * | 2013-06-14 | 2016-05-25 | 宁波科达制动器制造有限公司 | A kind of preparation method of turbocharger air compressor spiral case |
| CN104550827A (en) * | 2013-10-18 | 2015-04-29 | 丹阳市米可汽车零部件厂 | Oil pan machining process |
| CN103599906B (en) * | 2013-11-15 | 2015-08-26 | 西安航空动力股份有限公司 | Micro-Aviation Engine rectifier assembly water passage surface method for cleaning |
| CN104190876A (en) * | 2014-08-29 | 2014-12-10 | 无锡柯马机械有限公司 | Casting process for turbocharger compressor shell |
| CN105170944A (en) * | 2015-09-17 | 2015-12-23 | 天津市信通机械设备制造有限公司 | Low-pressure casting method for compressor body |
| CN105382239A (en) * | 2015-12-21 | 2016-03-09 | 常熟市制冷压缩机铸件厂 | Aluminum compressor housing of refrigerator |
| CN106077504A (en) * | 2016-06-29 | 2016-11-09 | 昆山邦泰汽车零部件制造有限公司 | A kind of deep working method of industrial robot protecting cover |
| CN108448765A (en) * | 2017-02-16 | 2018-08-24 | 福特全球技术公司 | The method of the magnetic characteristic of electrician's steel core for adjusting electric device |
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Application publication date: 20121107 |