CN101696688A - Oil pump gear and manufacturing method thereof - Google Patents
Oil pump gear and manufacturing method thereof Download PDFInfo
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- CN101696688A CN101696688A CN200910154458A CN200910154458A CN101696688A CN 101696688 A CN101696688 A CN 101696688A CN 200910154458 A CN200910154458 A CN 200910154458A CN 200910154458 A CN200910154458 A CN 200910154458A CN 101696688 A CN101696688 A CN 101696688A
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- oil pump
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Abstract
The invention discloses an oil pump gear comprising the following components in percentage by weight: 0.3%-0.6% of graphite, 1.5%-2.5% of copper, 1.5%-2.5% of nickel, 0.4%-0.7% of molybdenum, 0.6%-0.9% of lubricating agent, 0.3%-0.5% of cutting agent, and the balance of ferrum. A manufacturing method of the oil pump gear comprises the following steps: mixing materials; pressing; sintering; grinding; immersing into oil; and the like. By adopting the components and the manufacturing method, the rigidity and the pressure resistance of gear materials are greatly improved, machining process becomes simpler and the production efficiency is enhanced significantly and the cost is reduced.
Description
Technical field
The present invention relates to field of metallurgy, specifically is a kind of oil pump gear and manufacture method thereof that is used for the light airplane motor.
Background technique
Generally can use the gear of outer gearing in the engine oil pump of light airplane, when engine operation, the driving gear that camshaft drives oil pump rotates, gear whipping machine oil flow to oil outlet along the inwall of the pump housing from filler opening, thereby make and form low pressure in the pump, produce suction, the machine oil in the sump will be inhaled into filler opening.Along with the machine oil at oil pump oil outlet place is cumulative, use the increased pressure of oil port, so machine oil just is forced into each friction portion, the realization pressure lubrication.Want high so require the intensity of employed gear.Usually the general employing of the manufacture method of gear is machining mode, promptly carry out machining on gear forming lathe (as gear shaping machine, gear hobbing machine etc.), its process step is roughly blanking → heat treatment → handle at get on the bus out tooth base → forming gear on special purpose machine tool → blackout of lathe.But this manufacture method equipment needed thereby is more, and investment is big, the cost height; Simultaneously, this manufacture method operation is more, and the production time is long.The manufacture method of another gear makes by powder metallurgy, and the sintering temperature of existing powder metallurgy is up to 1115 degree, and produced gear density is 6.4～6.8g/cm
3, the gear hardness behind the corresponding like this sintering is just lower; In addition, the intensity of this gear is lower, and is not withstand voltage, thereby influence the speed of rotor of engine oil pump.
Summary of the invention
Technical problem to be solved by this invention is that a kind of intensity height, withstand voltage high oil pump gear are provided.
For solving the problems of the technologies described above, oil pump gear provided by the invention, it is made up of the each component of following weight percentage:
Graphite 0.3%～0.6%
Copper 1.5%～2.5%
Nickel 1.5%～2.5%
Molybdenum 0.4%～0.7%
Oiling agent 0.6%～0.9%
Cutting agent 0.3%～0.5%
Surplus is an iron.
Described oiling agent is zine stearate or paraffin oil.
Described cutting agent is manganese sulfide or calcirm-fluoride.
After adopting above-described composition and ratio, the present invention compared with prior art, have the following advantages: owing in batching, added nickel (its material behavior hard and have ductility), molybdenum (its material behavior is hard and tough and tensile), improve the hardness and the resistance to pressure of gear material greatly, thereby guaranteed the normal operation of oil pump.
Another technical problem to be solved by this invention is, provides that a kind of operation is simple, the manufacture method of the oil pump gear that can reduce cost greatly.
For solving the problems of the technologies described above, the manufacture method of oil pump gear provided by the invention, it comprises following step:
1) above-mentioned batching powder is prepared in proportion after, pour stirrer into and carry out batch mixing and stir;
2) above-mentioned mixed material powder being put into dry powder press suppresses;
3) semi-finished product after will suppressing carry out sintering in sintering furnace, and sintering furnace is divided into pre-burning section and sintering stage, and semi-finished product are successively by pre-burning section and sintering stage, and the employed gas of sintering is for decomposing ammonia;
4) semi-finished product behind the sintering are placed on carry out grinding on the grinding machine, make it highly reach desired height;
5) finished product after the above-mentioned steps is put into the vacuum oil immersion machine and carried out the processing of pressurize immersion oil.
Described step 2) in, pressing pressure is 32～35 tons, and pressing speed is 8～12/minute.
The pre-burning section is made as four sections respectively according to temperature in the described step 3), and its temperature is from low paramount 400～550 degree, 550～670 degree, 700～850 degree, 800～900 degree of being followed successively by.
Sintering stage is made as three sections respectively according to temperature in the described step 3), and its temperature is from low paramount 1115 ± 5 degree, 1120 ± 5 degree, 1125 ± 5 degree of being followed successively by.
The machine oil that is adopted in the described step 5) is 32# machine oil, and temperature is 70～100 degree, and pressure is 0.1 MPa, and the dwell time is 5 minutes.
After adopting above method, the present invention compared with prior art has the following advantages: owing to make the oil pump gear once-through by powder metallurgy method, need not other machining steps, make manufacturing procedure simpler, manufacturing efficiency improves greatly, and cost reduces greatly; Simultaneously, the temperature of sintering can reach 1125 ± 5 degree, and is higher than common 1115 degree sintering temperatures, makes the gear hardness behind the sintering higher.
Embodiment
Below in conjunction with embodiment the present invention is done explanation in further detail.
This oil pump gear, it is made up of the each component of following weight percentage:
Graphite 0.3%～0.6%
Copper 1.5%～2.5%
Nickel 1.5%～2.5%
Molybdenum 0.4%～0.7%
Oiling agent 0.6%～0.9%
Cutting agent 0.3%～0.5%
Surplus is an iron.
Described oiling agent is zine stearate or paraffin oil, uses zine stearate in the present embodiment.Described cutting agent is manganese sulfide or calcirm-fluoride, uses calcirm-fluoride in the present embodiment.Above difference is commercial gained.
The manufacture method of oil pump gear, it comprises following step:
1) above-mentioned batching powder is prepared in proportion after, pour bipyramid formula batch mixer into and carry out batch mixing and stir, batch mixing is 35 minutes at normal temperatures and pressures, its speed of agitator is 20 rev/mins;
2) above-mentioned mixed material powder is put into full-automatic dry powder press and suppress, pressing pressure is 32～35 tons, and pressing speed is 8～12/minute;
3) semi-finished product after will suppressing carry out sintering in 18 cun continuous mesh belt type sintering furnaces, sintering furnace can be divided into pre-burning section and sintering stage according to sintering temperature, the pre-burning section is made as four sections respectively according to temperature, and its temperature is from low paramount 400～550 degree, 550～670 degree, 700～850 degree, 800～900 degree of being followed successively by; Sintering stage is made as three sections respectively according to temperature, and its temperature is from low paramount 1115 ± 5 degree, 1120 ± 5 degree, 1125 ± 5 degree of being followed successively by; Semi-finished product are successively by each temperature section in pre-burning section and the sintering stage, and its speed of passing through is 8～10 mm/min, and the employed gas of sintering is for decomposing ammonia, i.e. hydrogen 75%, nitrogen 25%;
4) semi-finished product behind the sintering are placed on carry out grinding on the grinding machine, make it highly reach desired height;
5) semi-finished product after the above-mentioned steps are put into vacuum oil immersion machine pressurize immersion oil and handled, wherein the machine oil that is adopted is 32# machine oil, and temperature is 70～100 degree, and pressure is 0.1 MPa, and the dwell time is 5 minutes.
Claims (8)
1. oil pump gear, it is characterized in that: it is made up of the each component of following weight percentage:
Graphite 0.3%～0.6%
Copper 1.5%～2.5%
Nickel 1.5%～2.5%
Molybdenum 0.4%～0.7%
Oiling agent 0.6%～0.9%
Cutting agent 0.3%～0.5%
Surplus is an iron.
2. oil pump gear according to claim 1 is characterized in that: described oiling agent is zine stearate or paraffin oil.
3. oil pump gear according to claim 1 is characterized in that: described cutting agent is manganese sulfide or calcirm-fluoride.
4. the manufacture method of an oil pump gear, it is characterized in that: it comprises following step:
1) above-mentioned batching powder is prepared in proportion after, pour stirrer into and carry out batch mixing and stir;
2) above-mentioned mixed material powder being put into dry powder press suppresses;
3) semi-finished product after will suppressing carry out sintering in sintering furnace, and sintering furnace is divided into pre-burning section and sintering stage, and semi-finished product are successively by pre-burning section and sintering stage, and the employed gas of sintering is for decomposing ammonia;
4) semi-finished product behind the sintering are placed on carry out grinding on the grinding machine, make it highly reach desired height;
5) finished product after the above-mentioned steps is put into the vacuum oil immersion machine and carried out the processing of pressurize immersion oil.
5. the manufacture method of oil pump gear according to claim 4, it is characterized in that: described step 2), pressing pressure is 32～35 tons, and pressing speed is 8～12/minute.
6. the manufacture method of oil pump gear according to claim 4, it is characterized in that: the pre-burning section is made as four sections respectively according to temperature in the described step 3), and its temperature is from low paramount 400～550 degree, 550～670 degree, 700～850 degree, 800～900 degree of being followed successively by.
7. the manufacture method of oil pump gear according to claim 4, it is characterized in that: sintering stage is made as three sections respectively according to temperature in the described step 3), and its temperature is from low paramount 1115 ± 5 degree, 1120 ± 5 degree, 1125 ± 5 degree of being followed successively by.
8. the manufacture method of oil pump gear according to claim 4, it is characterized in that: the machine oil that is adopted in the described step 5) is 32# machine oil, and temperature is 70～100 degree, and pressure is 0.1 MPa, and the dwell time is 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910154458A CN101696688A (en) | 2009-10-28 | 2009-10-28 | Oil pump gear and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910154458A CN101696688A (en) | 2009-10-28 | 2009-10-28 | Oil pump gear and manufacturing method thereof |
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| CN101696688A true CN101696688A (en) | 2010-04-21 |
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| CN200910154458A Pending CN101696688A (en) | 2009-10-28 | 2009-10-28 | Oil pump gear and manufacturing method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009328A (en) * | 2010-12-30 | 2011-04-13 | 朝阳金河粉末冶金材料有限公司 | Method for manufacturing oil pump gear by powder metallurgy |
| CN102179519A (en) * | 2011-03-09 | 2011-09-14 | 宁波甬台粉末冶金有限公司 | Powder metallurgy transmission gear and manufacturing method thereof |
| CN102619929A (en) * | 2012-03-31 | 2012-08-01 | 常熟市迅达粉末冶金有限公司 | Gear speed reducing box |
| CN102950441A (en) * | 2012-10-27 | 2013-03-06 | 富莱茵汽车部件有限公司 | Production method for timing gear for engines |
| CN103056628A (en) * | 2012-10-27 | 2013-04-24 | 富莱茵汽车部件有限公司 | Crankshaft timing gear manufacturing method |
| CN103551561A (en) * | 2013-10-11 | 2014-02-05 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile transmission synchronizer gear and production method thereof |
| CN104227001A (en) * | 2014-09-24 | 2014-12-24 | 宁波金裕粉末冶金有限公司 | Powder metallurgy manufacturing process for counterbalance of hay mower |
| CN106103072A (en) * | 2014-04-22 | 2016-11-09 | Ntn株式会社 | Sintered mechanical part, the shaped device of powder compact and forming method |
| CN107225364A (en) * | 2016-03-24 | 2017-10-03 | 扬州保来得科技实业有限公司 | A kind of preparation method of automatic gearbox of vehicles clutch engagement signal wheel |
-
2009
- 2009-10-28 CN CN200910154458A patent/CN101696688A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009328A (en) * | 2010-12-30 | 2011-04-13 | 朝阳金河粉末冶金材料有限公司 | Method for manufacturing oil pump gear by powder metallurgy |
| CN102179519A (en) * | 2011-03-09 | 2011-09-14 | 宁波甬台粉末冶金有限公司 | Powder metallurgy transmission gear and manufacturing method thereof |
| CN102179519B (en) * | 2011-03-09 | 2013-01-23 | 宁波甬台粉末冶金有限公司 | Powder metallurgy transmission gear and manufacturing method thereof |
| CN102619929A (en) * | 2012-03-31 | 2012-08-01 | 常熟市迅达粉末冶金有限公司 | Gear speed reducing box |
| CN102950441B (en) * | 2012-10-27 | 2016-10-19 | 富莱茵汽车部件有限公司 | A kind of electromotor timing gears preparation method |
| CN103056628A (en) * | 2012-10-27 | 2013-04-24 | 富莱茵汽车部件有限公司 | Crankshaft timing gear manufacturing method |
| CN103056628B (en) * | 2012-10-27 | 2016-09-28 | 富莱茵汽车部件有限公司 | A kind of crankshaft timing gear preparation method |
| CN102950441A (en) * | 2012-10-27 | 2013-03-06 | 富莱茵汽车部件有限公司 | Production method for timing gear for engines |
| CN103551561A (en) * | 2013-10-11 | 2014-02-05 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile transmission synchronizer gear and production method thereof |
| CN106103072A (en) * | 2014-04-22 | 2016-11-09 | Ntn株式会社 | Sintered mechanical part, the shaped device of powder compact and forming method |
| CN106103072B (en) * | 2014-04-22 | 2018-12-28 | Ntn株式会社 | The molding machine and forming method of sintered mechanical part, powder compact |
| CN104227001A (en) * | 2014-09-24 | 2014-12-24 | 宁波金裕粉末冶金有限公司 | Powder metallurgy manufacturing process for counterbalance of hay mower |
| CN107225364A (en) * | 2016-03-24 | 2017-10-03 | 扬州保来得科技实业有限公司 | A kind of preparation method of automatic gearbox of vehicles clutch engagement signal wheel |
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Open date: 20100421 |