CN101524756A - Powder metallurgy production method of alligatoring rings of automobile gearbox - Google Patents
Powder metallurgy production method of alligatoring rings of automobile gearbox Download PDFInfo
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- CN101524756A CN101524756A CN200910029052A CN200910029052A CN101524756A CN 101524756 A CN101524756 A CN 101524756A CN 200910029052 A CN200910029052 A CN 200910029052A CN 200910029052 A CN200910029052 A CN 200910029052A CN 101524756 A CN101524756 A CN 101524756A
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- alligatoring
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Abstract
The invention discloses a powder metallurgy production method of alligatoring rings of an automobile gearbox, which comprises the following steps that: (1) proportioning: metal power stocks are prepared according to a certain proportion; (2) warm compaction forming: after being preheated, the prepared metal powder stocks are thrown into a mould of a powder extrusion moulding machine for warm compaction forming so as to form shaped green pressing; and (3) sintering: the shaped green pressing is arranged into a high-temperature mesh belt furnace for sintering. By the powder metallurgy production method for producing alligatoring rings of an automobile gearbox, the production efficiency can be improved, the profile precision can be guaranteed, and the production cost can be reduced.
Description
Technical field
The present invention relates to a kind of powder metallurgy production method of alligatoring rings of automobile gearbox.
Background technology
Generally by machined production, production efficiency is low for the conventional production methods of alligatoring rings of automobile gearbox, and profile accuracy is poor, the cost height is especially for the automobile production industry, because the requirement of mass, the machined cutting technology can't satisfy the in enormous quantities of automobile assembling, low cost, high-precision requirement.
Summary of the invention
Technical problem to be solved by this invention provides a kind of powder metallurgy production method of alligatoring rings of automobile gearbox, can enhance productivity by means of the production method of this powder metallurgy, guarantees profile accuracy, reduces production costs.
The present invention includes following steps, 1) batching: preparing metal powder stock in proportion; 2) warm-pressing formation: behind the metal dust raw material preheating that preparation is finished, drop into warm-pressing formation in the mould of powder extrusion forming machine, form the shaping green compact; 3) sintering: the shaping green compact are placed high temperature meshbeltfurnace sintering.
Preferably, described shaping green compact are that end face has the annulus that assembling guiding direct tube section and external diameter have conical tooth; After sintering step is finished, the assembling guiding direct tube section of excision part end face.
Preferably, according to following ratio preparing metal powder stock, Fe:86.0～98.0% (weight), C:0～1.0% (weight), Ni:1.0～7.0% (weight), Mo:0～1.0% (weight), Cu:1.0～5.0% (weight).
Preferably, the metal dust raw material preheating temperature is 80～160 ℃.
Preferably, in above-mentioned sintering process, the shaping green compact at first in the high temperature meshbeltfurnace through 5～10 minutes warm-up phase, 1100～1150 ℃ of insulations 30～60 minutes down, under protective atmosphere, progressively be cooled to room temperature at last then; The CO of sintering atmosphere
2Content is controlled at 0.3～0.5%; The temperature range of warm-up phase is 500～750 ℃.
Compare with traditional machined production, the present invention adopts the warm-pressing formation method of powder metallurgy to produce alligatoring rings of automobile gearbox, can enhance productivity, and guarantees profile accuracy, reduces production costs.
The structures shape of mould the structure of green compact be that end face has the annulus that assembling guiding direct tube section and external diameter have conical tooth.Assembling guiding direct tube section then is to be provided with for shaping, behind sintering above-mentioned assembling guiding direct tube section is excised.
It is good to have a suppression performance according to the metal dust raw material of aforementioned proportion preparation, dimensionally stable behind the product sintering, and the precision height, the intensity height, advantage such as wear-resistant, finished product has and the same welding performance of common machine processing metal part.
The metal dust raw material preheating temperature is controlled in 80～160 ℃ the temperature range, can make the surface of powder particle improve greatly, and strain reduces during compacting, and plastic deformation increases, and suppression performance improves, and the green compact elastic after effect reduces, and green density improves.The raising meeting of green density improves intensity and the hardness behind the green sintering synchronously.When preheat temperature is lower than 80 ℃, can't change the physical property of powder; When preheat temperature was higher than 160 ℃, the physical property of powder did not have obvious raising, but the distortion of mould expanded by heating obviously, and mould and die accuracy reduces, and caused the product precision to reduce.
Whole sintering process is through preheating, insulation, cooling three phases; Can remove the lubricant of suppressing the green compact interpolation for convenience through preheating; Base substrate near melting state behind holding stage, finish metallographic structure and generate, chemical changes such as alloy diffusion chemical combination, the final metal parts that forms truly.Reasonably sintering time and sintering temperature can guarantee that base substrate finishes the generation and the alloying of metallographic structure.CO
2Content can guarantee that the C content in the base substrate can enough participate in metallographic structure generation and alloying.
The specific embodiment
Embodiment 1
With 86gFe, 1gC, 7gNi, 1g Mo and 5gCu are preheating to 80 ℃ after mixing, then with warm-pressing formation in the mould of the input of the metal dust raw material after preheating powder extrusion forming machine, form shaping green compact, described shaping green compact are that end face has the annulus that assembling guiding direct tube section and external diameter have conical tooth; Next, above-mentioned shaping green compact are placed high temperature meshbeltfurnace sintering, the shaping green compact through 5 minutes warm-up phase after, the high temperature meshbeltfurnace progressively is warming up to 1100 ℃, 1100 ℃ of down insulations 30 minutes, progressively is cooled to room temperature at last under protective atmosphere; The CO of sintering atmosphere
2Content is controlled at 0.3～0.5%, and the temperature range of warm-up phase is 500～750 ℃.Behind the sintering, the assembling guiding direct tube section of excision part end face.
The key technical index of product is as shown in the table in the present embodiment:
| Global density | Tooth portion crushing strength | Surface roughness | Weld strength | Profile accuracy |
| 7.19g/cm3 | 1356kgf | Ra1.3 | 6233kgf | The JIS5 level |
Embodiment 2
With 89gFe, 0.75gC, 5.5gNi, 0.75g Mo and 4gCu are preheating to 100 ℃ after mixing, then with warm-pressing formation in the mould of the input of the metal dust raw material after preheating powder extrusion forming machine, form shaping green compact, described shaping green compact are that end face has the annulus that assembling guiding direct tube section and external diameter have conical tooth; Next, above-mentioned shaping green compact are placed high temperature meshbeltfurnace sintering, the shaping green compact through 6 minutes warm-up phase after, the high temperature meshbeltfurnace progressively is warming up to 1113 ℃, under 1113 ℃ temperature the insulation 38 minutes, under protective atmosphere, progressively be cooled to room temperature at last; The CO of sintering atmosphere
2Content is controlled at 0.3～0.5%, and the temperature range of warm-up phase is 500～750 ℃.Behind the sintering, the assembling guiding direct tube section of excision part end face.
The key technical index of product is as shown in the table in the present embodiment:
| Global density | Tooth portion crushing strength | Surface roughness | Weld strength | Profile accuracy |
| 7.20g/cm3 | 1312kgf | Ra1.2 | 6401kgf | The JIS5 level |
Embodiment 3
With 92g Fe, 0.5gC, 4gNi, 0.5g Mo and 3gCu are preheating to 120 ℃ after mixing, then with warm-pressing formation in the mould of the input of the metal dust raw material after preheating powder extrusion forming machine, form shaping green compact, described shaping green compact are that end face has the annulus that assembling guiding direct tube section and external diameter have conical tooth; Next, above-mentioned shaping green compact are placed high temperature meshbeltfurnace sintering, the shaping green compact through 7 minutes warm-up phase after, the high temperature meshbeltfurnace progressively is warming up to 1120 ℃, under 1120 ℃ temperature the insulation 45 minutes, under protective atmosphere, progressively be cooled to room temperature at last; The CO of sintering atmosphere
2Content is controlled at 0.3～0.5%, and the temperature range of warm-up phase is 500～750 ℃.Behind the sintering, the assembling guiding direct tube section of excision part end face.
The key technical index of product is as shown in the table in the present embodiment:
| Global density | Tooth portion crushing strength | Surface roughness | Weld strength | Profile accuracy |
| 7.19g/cm3 | 1401kgf | Ra1.3 | 6375kgf | The JIS5 level |
Embodiment 4
With 95gFe, 0.25gC, 2.5gNi, 0.25g Mo and 2gCu are preheating to 140 ℃ after mixing, then with warm-pressing formation in the mould of the input of the metal dust raw material after preheating powder extrusion forming machine, form shaping green compact, described shaping green compact are that end face has the annulus that assembling guiding direct tube section and external diameter have conical tooth; Next, above-mentioned shaping green compact are placed high temperature meshbeltfurnace sintering, the shaping green compact through 8 minutes warm-up phase after, the high temperature meshbeltfurnace progressively is warming up to 1138 ℃, under 1138 ℃ temperature the insulation 53 minutes, under protective atmosphere, progressively be cooled to room temperature at last; The CO of sintering atmosphere
2Content is controlled at 0.3～0.5%, and the temperature range of warm-up phase is 500～750 ℃.Behind the sintering, the assembling guiding direct tube section of excision part end face.
The key technical index of product is as shown in the table in the present embodiment:
| Global density | Tooth portion crushing strength | Surface roughness | Weld strength | Profile accuracy |
| 7.20g/cm3 | 1341kgf | Ra1.3 | 6356kgf | The JIS5 level |
Embodiment 5
With 98g Fe, 1gNi and 1gCu are preheating to 160 ℃ after mixing, then the metal dust raw material after the preheating is dropped into warm-pressing formation in the mould of powder extrusion forming machine, form shaping green compact, described shaping green compact are that end face has the annulus that assembling guiding direct tube section and external diameter have conical tooth; Next, above-mentioned shaping green compact are placed high temperature meshbeltfurnace sintering, the shaping green compact through 10 minutes warm-up phase after, the high temperature meshbeltfurnace progressively is warming up to 1150 ℃, under 1150 ℃ temperature the insulation 60 minutes, under protective atmosphere, progressively be cooled to room temperature at last; The CO of sintering atmosphere
2Content is controlled at 0.3～0.5%, and the temperature range of warm-up phase is 500～750 ℃.Behind the sintering, the assembling guiding direct tube section of excision part end face.
The key technical index of product is as shown in the table in the present embodiment:
| Global density | Tooth portion crushing strength | Surface roughness | Weld strength | Profile accuracy |
| 7.22g/cm3 | 1394kgf | Ra1.3 | 6412kgf | The JIS5 level |
Claims (5)
1, a kind of powder metallurgy production method of alligatoring rings of automobile gearbox is characterized in that: may further comprise the steps,
1) batching: preparing metal powder stock in proportion;
2) warm-pressing formation: behind the metal dust raw material preheating that preparation is finished, drop into warm-pressing formation in the mould of powder extrusion forming machine, form the shaping green compact;
3) sintering: the shaping green compact are placed high temperature meshbeltfurnace sintering.
2, a kind of powder metallurgy production method of alligatoring rings of automobile gearbox according to claim 1 is characterized in that: described shaping green compact are that end face has the annulus that assembling guiding direct tube section and external diameter have conical tooth; After sintering step is finished, the assembling guiding direct tube section of excision part end face.
3, a kind of powder metallurgy production method of alligatoring rings of automobile gearbox according to claim 1 and 2, it is characterized in that: according to following ratio preparing metal powder stock, Fe:86.0～98.0% (weight), C:0～1.0% (weight), Ni:1.0～7.0% (weight), Mo:0～1.0% (weight), Cu:1.0～5.0% (weight).
4, a kind of powder metallurgy production method of alligatoring rings of automobile gearbox according to claim 3 is characterized in that: the metal dust raw material preheating temperature is 80～160 ℃.
5, a kind of powder metallurgy production method of alligatoring rings of automobile gearbox according to claim 3, it is characterized in that: in above-mentioned sintering process, the shaping green compact at first in the high temperature meshbeltfurnace through 5～10 minutes warm-up phase, be incubated 30～60 minutes down at 1100～1150 ℃ then, under protective atmosphere, progressively be cooled to room temperature at last; The CO2 content of sintering atmosphere is controlled at 0.3～0.5%; The temperature range of warm-up phase is 500～750 ℃.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769370A (en) * | 2010-03-02 | 2010-07-07 | 扬州保来得科技实业有限公司 | Powder metallurgy eccentric helical gear and preparation method thereof |
| CN101782143A (en) * | 2010-03-04 | 2010-07-21 | 扬州保来得科技实业有限公司 | Ceramimetallurgical automobile steering gear face cam and preparation method thereof |
| CN102242779A (en) * | 2011-05-31 | 2011-11-16 | 莱州长和粉末冶金有限公司 | Outer cone ring of heavy truck gear box synchronizer and manufacturing process thereof |
| CN102335744A (en) * | 2011-09-22 | 2012-02-01 | 安徽奥泰粉末冶金有限公司 | Production process of guider of front shock absorber of automobile |
| CN102921942A (en) * | 2012-10-17 | 2013-02-13 | 宁波拓发汽车零部件有限公司 | Guider of damper and preparation method of guider |
| CN103231129A (en) * | 2013-04-28 | 2013-08-07 | 莱州天润机械有限公司 | Die stock and warm compaction process thereof |
| CN103464750A (en) * | 2013-10-12 | 2013-12-25 | 泰州市新诚新材料科技有限公司 | Manufacturing method of automobile ABS (acrylonitrile-butadiene-styrene) induction counting tooth ring |
| CN106555879A (en) * | 2017-01-16 | 2017-04-05 | 扬州保来得科技实业有限公司 | Vehicle manual lock with each piece of gear-box and preparation method thereof |
| 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 |
| CN111451511A (en) * | 2020-04-30 | 2020-07-28 | 陕西省机械研究院 | Powder metallurgy preparation process for conical ring of nine-claw three-conical-surface synchronizer |
| CN113333755A (en) * | 2021-05-21 | 2021-09-03 | 扬州保来得科技实业有限公司 | Preparation method of powder metallurgy face tooth of angle grinder |
-
2009
- 2009-01-16 CN CN200910029052A patent/CN101524756A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769370A (en) * | 2010-03-02 | 2010-07-07 | 扬州保来得科技实业有限公司 | Powder metallurgy eccentric helical gear and preparation method thereof |
| CN101782143A (en) * | 2010-03-04 | 2010-07-21 | 扬州保来得科技实业有限公司 | Ceramimetallurgical automobile steering gear face cam and preparation method thereof |
| CN102242779B (en) * | 2011-05-31 | 2013-03-20 | 莱州长和粉末冶金有限公司 | Manufacturing process of outer cone ring of heavy truck gear box synchronizer |
| CN102242779A (en) * | 2011-05-31 | 2011-11-16 | 莱州长和粉末冶金有限公司 | Outer cone ring of heavy truck gear box synchronizer and manufacturing process thereof |
| CN102335744B (en) * | 2011-09-22 | 2013-06-19 | 安徽奥泰粉末冶金有限公司 | Production process of guider of front shock absorber of automobile |
| CN102335744A (en) * | 2011-09-22 | 2012-02-01 | 安徽奥泰粉末冶金有限公司 | Production process of guider of front shock absorber of automobile |
| CN102921942A (en) * | 2012-10-17 | 2013-02-13 | 宁波拓发汽车零部件有限公司 | Guider of damper and preparation method of guider |
| CN102921942B (en) * | 2012-10-17 | 2015-01-14 | 宁波拓发汽车零部件有限公司 | Guider of damper and preparation method of guider |
| CN103231129A (en) * | 2013-04-28 | 2013-08-07 | 莱州天润机械有限公司 | Die stock and warm compaction process thereof |
| CN103464750A (en) * | 2013-10-12 | 2013-12-25 | 泰州市新诚新材料科技有限公司 | Manufacturing method of automobile ABS (acrylonitrile-butadiene-styrene) induction counting tooth ring |
| 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 |
| CN106555879A (en) * | 2017-01-16 | 2017-04-05 | 扬州保来得科技实业有限公司 | Vehicle manual lock with each piece of gear-box and preparation method thereof |
| CN111451511A (en) * | 2020-04-30 | 2020-07-28 | 陕西省机械研究院 | Powder metallurgy preparation process for conical ring of nine-claw three-conical-surface synchronizer |
| CN113333755A (en) * | 2021-05-21 | 2021-09-03 | 扬州保来得科技实业有限公司 | Preparation method of powder metallurgy face tooth of angle grinder |
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Open date: 20090909 |