CN1305615C - Powder metallurgy manufacturing method of inside and outside rotor in oil pump - Google Patents
Powder metallurgy manufacturing method of inside and outside rotor in oil pump Download PDFInfo
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- CN1305615C CN1305615C CNB2004100935833A CN200410093583A CN1305615C CN 1305615 C CN1305615 C CN 1305615C CN B2004100935833 A CNB2004100935833 A CN B2004100935833A CN 200410093583 A CN200410093583 A CN 200410093583A CN 1305615 C CN1305615 C CN 1305615C
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- oil pump
- powder metallurgy
- outside rotor
- sintering
- manufacture method
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Abstract
The present invention relates to a powder metallurgy manufacturing method for inside and outside rotors in an automobile oil pump, which comprises the steps of pressing, sintering, shaping, machining, etc. A material for the present invention comprises the components of 1.57 to 1.93% of nickel, 0.16 to 0.24% of graphite powder, 1.35 to 1.55% of copper, 0.45 to 0.55% of molybdenum, at most 0.5% of manganese sulfide, 0.8 to 1.0% of paraffin wax (lubricant) and powdered iron as the rest. The inside and outside rotors in an oil pump of the present invention are used in the automobile oil pump, and have the advantages of short processing time, low cost, superior intensity, good impact toughness, high hardness, favorable abrasive resistance and good machinability.
Description
Technical field
The present invention relates in particular to the powder metallurgy manufacture method of automobile engine oil pump inner and outer rotors about powder metallurgical technology.
Background technology
Inside and outside rotor in oil pump is used for automobile engine, this cover rotor tooth form complexity, and the dimension precision requirement height, according to pattern and use and matching requirements that the client provides, general turning technology can't satisfy.See also Fig. 1 and Fig. 2, the profile of tooth of existing internal rotor is point, and the top of its tooth is very narrow, and wearing and tearing easily cause engine failure in the use.So the invention provides a kind of method that adopts powder metallurgical technique to make inside and outside rotor in oil pump, the inside and outside rotor in oil pump that this method is produced has higher tooth portion intensity, long service life, and process time is short, and cost is low.
Summary of the invention
The object of the present invention is to provide a kind of powder metallurgy manufacture method of automobile engine oil pump inner and outer rotors.
The present invention realizes by following technical method: the powder metallurgy manufacture method of inside and outside rotor in oil pump comprises the steps:
1) suppression process: the part composition of raw materials is: nickel 1.57～1.93%+ graphite powder 0.16～0.24%+ copper 1.35～1.55%+ molybdenum 0.45～0.55%+ manganese sulfide≤0.5%+ paraffin 0.8～1.0%, and surplus is an iron powder; The density of material compacting of part raw material is reached 7.0g/cm
3More than;
2) sintering circuit: the pressed compact sintering is put in the high temperature guipure electric furnace, and sintering temperature is set to: preheat temperature＜650 ℃ ± 20 ℃, 750 ℃ ± 20 ℃ 〉, the three-stage sintering temperature is respectively＜and 1110 ℃ ± 10 ℃, 1120 ℃ ± 10 ℃, 1120 ℃ ± 10 ℃ 〉;
The guipure fltting speed is: 5 meters/hour;
Protective atmosphere: nitrogen (10～12Nm
3/ h) and cracked ammonium (1～2Nm
3/ h);
3) after shaping and machined obtain satisfactory inner and outer rotors.
The inside and outside rotor in oil pump that the present invention produced has higher intensity, and impact flexibility is good, the hardness height, and wearability is good, and machinability is good.
Description of drawings
Fig. 1 is existing lubricating oil pump inner rotor core schematic diagram.
Fig. 2 is the outer inner rotor core schematic diagram of existing lubricating oil pump.
Fig. 3 is a lubricating oil pump inner rotor core schematic diagram of the present invention.
Fig. 4 is a lubricating oil pump outer-rotor structure schematic diagram of the present invention.
Fig. 5 is an inside and outside rotor in oil pump combining structure schematic diagram of the present invention.
The specific embodiment
See also Fig. 3～5, rotor of engine oil pump of the present invention is compared with common rotor of engine oil pump, its tooth portion broad, rotate flexibly, stably on the basis, existing higher tooth portion intensity also has bigger discharge capacity.
The material prescription that the powder metallurgy manufacture method of inside and outside rotor in oil pump of the present invention is adopted: nickel 1.57～1.93%+ graphite powder 0.16～0.24%+ copper 1.35～1.55%+ molybdenum 0.45～0.55%+ manganese sulfide≤0.5%+ paraffin 0.8～1.0% (lubricant), surplus is an iron powder.The used material of inner and outer rotors is the same.
The inside and outside rotor in oil pump that this kind combination of materials is produced has higher intensity, and impact flexibility is good, the hardness height, and wearability is good, and machinability is good.
Following table for the proportioning of each composition in 5 specific embodiments of the present invention is:
The powder metallurgy manufacture method of inside and outside rotor in oil pump of the present invention comprises the steps:
1) suppression process: the density of the strict control of compacting part reaches 7.0g/cm
3More than, and strict control parts density is poor, otherwise easily causes the intensity of part or local strength on the low side;
2) sintering circuit: the pressed compact sintering is put in the high temperature guipure electric furnace, and sintering temperature is set to: preheat temperature＜650 ℃ ± 20 ℃, 750 ℃ ± 20 ℃ 〉, the three-stage sintering temperature is respectively＜and 1110 ℃ ± 10 ℃, 1120 ℃ ± 10 ℃, 1120 ℃ ± 10 ℃ 〉;
The guipure fltting speed is: 5 meters/hour;
Protective atmosphere: nitrogen (10～12Nm
3/ h) and cracked ammonium (1～2Nm
3/ h);
Sintered blank does not allow to produce oxidation, burning, carbon distribution and generation bubble;
3) trimming: shaping is in order to make part satisfy client's the dimensional requirement of using and assembling, so strict control accessory size, especially fitted position and use size during shaping;
4) machining processes: internal rotor mill processing two planes, the Vehicle Processing endoporus makes part satisfy user's matching requirements; Outer rotor mill processing two planes and cylindrical make outer rotor satisfy user's matching requirements.
The performance indications of inside and outside rotor in oil pump made according to the method for the present invention all can reach requirement after bench test, and owing to adopt powder metallurgical technique, cost is low, and process time is short.
Claims (4)
1. the powder metallurgy manufacture method of an inside and outside rotor in oil pump comprises the steps:
1) suppression process; 2) sintering circuit; 3) after shaping and machined obtain satisfactory inner and outer rotors, it is characterized in that: the weight ratio of part composition of raw materials is:
Nickel 1.57～1.93%
Graphite powder 0.16～0.24%
Copper 1.35～1.55%
Molybdenum 0.45～0.55%
Manganese sulfide 0～0.5%
Paraffin 0.8～1.0%,
Surplus is an iron powder.
2. the powder metallurgy manufacture method of inside and outside rotor in oil pump as claimed in claim 1 is characterized in that described suppression process is, the density of material of part raw material is suppressed reach 7.0g/cm
3More than.
3. the powder metallurgy manufacture method of inside and outside rotor in oil pump as claimed in claim 1, it is characterized in that described sintering circuit: the pressed compact sintering is put in the high temperature guipure electric furnace, sintering temperature is set to: 630 ℃ to 670 ℃ of preheat temperatures, be raised to 730 ℃ to 770 ℃, the three-stage sintering temperature is respectively 1100 ℃ to 1120 ℃, 1110 ℃ to 1130 ℃, 1110 ℃ to 1130 ℃.
4. the powder metallurgy manufacture method of inside and outside rotor in oil pump as claimed in claim 1 is characterized in that: protective atmosphere in the sintering circuit: nitrogen 10～12Nm
3/ h and cracked ammonium 1～2Nm
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100935833A CN1305615C (en) | 2004-12-24 | 2004-12-24 | Powder metallurgy manufacturing method of inside and outside rotor in oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100935833A CN1305615C (en) | 2004-12-24 | 2004-12-24 | Powder metallurgy manufacturing method of inside and outside rotor in oil pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1631583A CN1631583A (en) | 2005-06-29 |
| CN1305615C true CN1305615C (en) | 2007-03-21 |
Family
ID=34847756
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100935833A Active CN1305615C (en) | 2004-12-24 | 2004-12-24 | Powder metallurgy manufacturing method of inside and outside rotor in oil pump |
Country Status (1)
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| CN103192071B (en) * | 2013-04-23 | 2015-03-04 | 南京浩德粉末冶金有限公司 | Powder metallurgical formulas for internal and external rotors of hydraulic slippage pump and manufacturing method of internal and external rotors of hydraulic slippage pump |
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| CN103537675A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automotive oil pump internal and external rotors and manufacturing method thereof |
| CN103537666A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy oil pump rotor and manufacturing method thereof |
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| CN103537669A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder-metallurgy automobile booster pump stator and manufacturing method thereof |
| CN104001923A (en) * | 2014-06-19 | 2014-08-27 | 山西东睦华晟粉末冶金有限公司 | Powder metallurgy manufacturing method for pressure plate |
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| CN106111977B (en) * | 2016-07-29 | 2018-05-22 | 合肥波林新材料股份有限公司 | A kind of rotor of engine oil pump manufacturing method |
| CN107761003A (en) * | 2017-09-20 | 2018-03-06 | 上海汽车粉末冶金有限公司 | The powder metallurgy sintered method of bearing cap |
| CN108637259B (en) * | 2018-04-12 | 2020-04-14 | 金华市宇辰粉末冶金有限公司 | Powder metallurgy saw blade upper and lower pressing plates and production method thereof |
| CN108547767A (en) * | 2018-05-28 | 2018-09-18 | 山西东睦华晟粉末冶金有限公司 | A kind of combined type cycloid rotor and preparation method thereof |
| CN110760759A (en) * | 2019-12-03 | 2020-02-07 | 德钜（厦门）特种合金制品有限公司 | Powder metallurgy sintering process for sliding block |
| CN112059169B (en) * | 2020-08-11 | 2023-02-21 | 山东鲁银新材料科技有限公司 | Production method of iron-based premixed powder for engine rotor |
| CN112059190A (en) * | 2020-09-02 | 2020-12-11 | 苏州萨伯工业设计有限公司 | Manufacturing method of oil replenishing pump rotor based on powder metallurgy |
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| JPH02153046A (en) * | 1988-12-06 | 1990-06-12 | Kawasaki Steel Corp | High strength sintered alloy steel |
| US6203753B1 (en) * | 1996-05-13 | 2001-03-20 | The Presmet Corporation | Method for preparing high performance ferrous materials |
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| CN1631583A (en) | 2005-06-29 |
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Owner name: SHANGHAI AUTO POWDER METALLURGY CO.,LTD Free format text: FORMER OWNER: SHANGHAI AUTOMOBILE CO. LTD. Effective date: 20090710 |
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Effective date of registration: 20090710 Address after: Shanghai City Wenchuan Road No. 5475 room 467 Patentee after: Shanghai Automobile Powder Metallurgy Co., Ltd. Address before: Shanghai City, Pudong Zhangjiang hi tech park, Songtao Road No. 563 building A Patentee before: Shanghai Automobile Co., Ltd. |