CN1316173C - Method of making oil-containing bearing block through powdered metallurgy - Google Patents
Method of making oil-containing bearing block through powdered metallurgy Download PDFInfo
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- CN1316173C CN1316173C CNB2004100935848A CN200410093584A CN1316173C CN 1316173 C CN1316173 C CN 1316173C CN B2004100935848 A CNB2004100935848 A CN B2004100935848A CN 200410093584 A CN200410093584 A CN 200410093584A CN 1316173 C CN1316173 C CN 1316173C
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- impregnated bearing
- sintering
- bearing piece
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Abstract
The present invention relates to a method for manufacturing an oil-impregnated bearing block through powdered metallurgy. The method comprises the following steps: a mixing process step; a pressing process step; a sintering process step; a shaping process step; a vibrator deburring process step; oil hole drilling, prepared hole drilling and tapping process steps; an oil immersion process step. The method has the material prescription that 1 to 5% of copper powder, 0.6 to 0.9% pf graphite powder, 0.8 to 1.0% of zinc stearate and iron powder (the rest percentage). The present invention has the advantages of high surface hardness of the oil-impregnated bearing block, high breaking strength of the bearing, and low processing cost.
Description
Technical field
The present invention relates in particular to powder metallurgy manufacture method and the raw material of escalator with the oil-impregnated bearing piece about powder metallurgical technology.
Background technique
Left and right sides drive tab is applied on the escalator, about every grade of step each with one, this design of part complex contour sees also Fig. 1, and and bearing between lubrication will be arranged.Existing left and right sides drive tab needs machining, and cost is higher, and because drive tab is fine and close part, is difficult to guarantee the lubrication between drive tab and bearing.
Summary of the invention
The object of the present invention is to provide the powder metallurgy manufacture method of a kind of escalator with the oil-impregnated bearing piece, its cost is lower, and can guarantee the lubrication between drive tab and bearing.
The objective of the invention is to be achieved through the following technical solutions: the powder metallurgy manufacture method of oil-impregnated bearing piece comprises the steps:
1) compounding process: various raw materials are mixed; Prescription is:
Copper powder 1～5%
Plumbago 0.6～0.9%
Zine stearate 0.8～1.0%
Iron powder (surplus);
Reform 2) suppression process: the density of raw material is reached 6.7～6.9g/cm
3
3) sintering circuit: the pressed compact sintering is put in the high temperature guipure electric furnace, and sintering temperature is set to: preheating temperature rises to 730-770 ℃ from 630-670 ℃, and the three-stage sintering temperature is respectively 1100-1120 ℃, and 1110-1130 ℃, 1110-1130 ℃;
The guipure fltting speed is: 5 meters/hour;
Shielding gas atmosphere: nitrogen 10～12Nm
3/ h and cracked ammonium 1～2Nm
3/ h;
4) trimming: make the fitted position of part and use size to satisfy customer requirement,
5) vibrator deburring operation: the little burr by vibration removal edge makes the smooth no burr of product;
6) bore oilhole, thread Pilot hole, tapping with machine-tooled method;
7) immersion oil operation: by immersion oil, oil will be penetrated in the product through hole.
Oil-impregnated bearing piece surface hardness height of the present invention, bearing breakdown strength height.
Description of drawings
The structural representation of the left and right sides drive tab on Fig. 1 escalator.
Embodiment
Escalator has with the performance requirement of oil-impregnated bearing piece: density 6.7～6.9g/cm
3, surface hardness HRB＞30, bearing breakdown strength＞7000Kg.
Escalator of the present invention with the material prescription that the powder metallurgy manufacture method of oil-impregnated bearing piece is adopted is: iron powder (surplus)+copper powder 1～5%+ plumbago 0.6～0.9%+ zine stearate 0.8～1.0% (oiling agent)
Following table for the proportioning of each composition in 5 specific embodiments of the present invention is:
Escalator of the present invention comprises the steps: with the powder metallurgy manufacture method of oil-impregnated bearing piece
1) compounding process: guarantee that various raw material mix, impurity must not be arranged, in order to avoid influence the performance of product.
2) suppression process: the density of the strict control of compacting part reaches 6.7～6.9g/cm
3, had not only guaranteed the requirement of strength of part but also can guarantee the final containing ratio of product, and strict control parts density is poor, otherwise easily cause the intensity of part or local strength on the low side.
3) sintering circuit: the pressed compact sintering is put in the high temperature guipure electric furnace, and sintering temperature is set to: preheating 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;
Shielding gas atmosphere: nitrogen (10～12Nm
3/ h) and cracked ammonium (1～2Nm
3/ h);
Sintered blank does not allow to produce oxidation, burning, underburnt, carbon distribution and generation bubble.
4) trimming: shaping is in order to make part satisfy client's the size requirement of using and assembling, so strict control accessory size, especially fitted position and use size during shaping.
5) vibrator deburring operation: the product with the powder metallurgical technique technology is produced, all can have certain little burr at edge, can make the smooth no burr of product by vibrator deburring;
6) bore oilhole, thread Pilot hole, tapping: because of oilhole and tapped hole are radial hole, can't be shaped, can only use machine-tooled method with powder metallurgy process;
7) immersion oil operation: powder metallurgy product is not fine and close part, and there is certain hole in product, and product is by immersion oil, and oil will be penetrated in the product through hole.Product oil in working order can infiltrate, and plays lubrication, and when not working, oil can be got back in the product through hole again, and this is that fine and close part can't be realized.
The performance index of oil-impregnated bearing piece made according to the method for the present invention all can reach requirement after stand test, and owing to adopt powder metallurgy process, process time is short, and cost is low.
Claims (4)
1. the powder metallurgy manufacture method of an oil-impregnated bearing piece comprises the steps:
1) compounding process: various raw materials are mixed, and filling a prescription is:
Copper powder 1～5%
Plumbago 0.6～0.9%
Zine stearate 0.8～1.0%
The iron powder surplus;
2) suppression process: the density of raw material spare is reached 6.7～6.9g/cm
3
3) sintering circuit: the pressed compact sintering is put in the high temperature guipure electric furnace, and sintering temperature is set to: preheating temperature rises to 730-770 ℃ from 630-670 ℃, and the three-stage sintering temperature is respectively 1100-1120 ℃, and 1110-1130 ℃, 1110-1130 ℃;
4) trimming: the fitted position of finishing part and use size;
5) deburring operation: remove the little burr of edge, make the smooth no burr of product;
6) bore oilhole, thread Pilot hole, tapping with machine-tooled method;
7) immersion oil operation: by immersion oil, oil will be penetrated in the drive tab through hole.
2. the powder metallurgy manufacture method of oil-impregnated bearing piece as claimed in claim 1 is characterized in that: in the sintering circuit, the guipure fltting speed is: 5 meters/hour.
3. the powder metallurgy manufacture method of oil-impregnated bearing piece as claimed in claim 1, it is characterized in that: shielding gas atmosphere is in the sintering circuit, nitrogen 10～12Nm
3/ h and cracked ammonium 1～2Nm
3/ h.
4. the powder metallurgy manufacture method of oil-impregnated bearing piece as claimed in claim 1 is characterized in that: deburring operation adopts method for oscillating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100935848A CN1316173C (en) | 2004-12-24 | 2004-12-24 | Method of making oil-containing bearing block through powdered metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100935848A CN1316173C (en) | 2004-12-24 | 2004-12-24 | Method of making oil-containing bearing block through powdered metallurgy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632339A CN1632339A (en) | 2005-06-29 |
| CN1316173C true CN1316173C (en) | 2007-05-16 |
Family
ID=34847757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100935848A Expired - Fee Related CN1316173C (en) | 2004-12-24 | 2004-12-24 | Method of making oil-containing bearing block through powdered metallurgy |
Country Status (1)
| Country | Link |
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| CN (1) | CN1316173C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4886545B2 (en) * | 2007-02-22 | 2012-02-29 | 日立粉末冶金株式会社 | Sintered oil-impregnated bearing and manufacturing method thereof |
| CN101249564B (en) * | 2008-03-26 | 2010-12-22 | 浙江中平粉末冶金有限公司 | Powder metallurgy technique |
| JP5247329B2 (en) * | 2008-09-25 | 2013-07-24 | 日立粉末冶金株式会社 | Iron-based sintered bearing and manufacturing method thereof |
| CN102506072A (en) * | 2011-10-13 | 2012-06-20 | 枣庄市润源粉末冶金有限公司 | Powder metallurgy oil-impregnated bearing |
| CN103317129B (en) * | 2013-06-20 | 2016-05-18 | 成都威士达粉末冶金有限公司 | A kind of high abrasion bearing |
| 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 |
| CN106216657B (en) * | 2016-07-27 | 2018-05-22 | 合肥波林新材料股份有限公司 | A kind of plunger pump backhaul disc manufacturing method |
| CN106238735B (en) * | 2016-08-15 | 2018-06-26 | 东睦新材料集团股份有限公司 | A kind of preparation method of compressor connecting bar |
| CN106424703B (en) * | 2016-09-22 | 2018-08-28 | 东睦新材料集团股份有限公司 | A kind of preparation method of compressor piston |
| CN107309432B (en) * | 2017-05-10 | 2020-05-05 | 武汉理工大学 | Powder metallurgy-rolling forming manufacturing method of oil-containing bearing ring |
| CN107234243B (en) * | 2017-05-19 | 2020-09-15 | 海安县鹰球粉末冶金有限公司 | Manufacturing method of high-precision combined material oil-retaining bearing for low-noise defrosting fan |
| CN107214330B (en) * | 2017-05-19 | 2020-09-11 | 海安县鹰球粉末冶金有限公司 | High-precision oil-retaining bearing material for low-noise defrosting fan |
| CN108746612A (en) * | 2018-08-30 | 2018-11-06 | 江晓堂 | The bearing used in a kind of low lubricant environment invades the metallurgy sintered device of oil |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0995759A (en) * | 1995-09-29 | 1997-04-08 | Heiwa Sangyo Kk | Oil-impregnated sintered bearing and its production |
| US5980819A (en) * | 1997-03-13 | 1999-11-09 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Sintered oil-impregnated bearing, manufacturing method thereof, and motor comprising same |
| CN1270944A (en) * | 2000-03-21 | 2000-10-25 | 中国科学院上海硅酸盐研究所 | Sialon ceramic material for bearing ball and its preparation |
| JP2001107162A (en) * | 1999-10-12 | 2001-04-17 | Sumitomo Electric Ind Ltd | Bronze series sintered alloy, bearing using the same and their producing method |
-
2004
- 2004-12-24 CN CNB2004100935848A patent/CN1316173C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0995759A (en) * | 1995-09-29 | 1997-04-08 | Heiwa Sangyo Kk | Oil-impregnated sintered bearing and its production |
| US5980819A (en) * | 1997-03-13 | 1999-11-09 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Sintered oil-impregnated bearing, manufacturing method thereof, and motor comprising same |
| JP2001107162A (en) * | 1999-10-12 | 2001-04-17 | Sumitomo Electric Ind Ltd | Bronze series sintered alloy, bearing using the same and their producing method |
| CN1270944A (en) * | 2000-03-21 | 2000-10-25 | 中国科学院上海硅酸盐研究所 | Sialon ceramic material for bearing ball and its preparation |
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| Publication number | Publication date |
|---|---|
| CN1632339A (en) | 2005-06-29 |
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