CN103899372B - A kind of powder metallurgy combined sintering formula camshaft and preparation method thereof - Google Patents
A kind of powder metallurgy combined sintering formula camshaft and preparation method thereof Download PDFInfo
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- CN103899372B CN103899372B CN201210580145.4A CN201210580145A CN103899372B CN 103899372 B CN103899372 B CN 103899372B CN 201210580145 A CN201210580145 A CN 201210580145A CN 103899372 B CN103899372 B CN 103899372B
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Abstract
The invention discloses and belong to a kind of automobile of powder metallurgical technology, motorcycle engine powder metallurgy combined sintering formula camshaft and preparation method thereof.The steel alloy that mandrel material is carbon content more than 0.6% of this camshaft or high-carbon steel etc., after merge sintering with cam set, mandrel hardness HRC more than 20, the part of mandrel can use directly as the axle journal of camshaft.Whole preparation technology flow process only include suppressing cam, combine, sinter, four master operations of following process can complete the preparation of camshaft, technique is simple, and material-saving, energy-saving effect are obvious；Have that wearability is good, material-saving, advantage that pollution is few.After quickly cooling, mandrel hardness can reach the scope of HRC more than 20, and enables the part of mandrel to be directly used as axle journal, eliminates mandrel quenching technical, shortens technological process, reduces energy consumption, reduces cost, and simplifies cam shaft design.
Description
Technical field
The invention belongs to powder metallurgical technology, particularly to a kind of automobile, motorcycle engine powder
Metallurgical combined sintering formula camshaft and preparation method thereof.
Background technology
Camshaft belongs to engine air distribution system key components and parts, and its traditional preparation technology usually uses casting
Make or rough forging is machined and forms, there is quality weight, stock utilization is low, wear no resistance, energy consumption high
Problem.In order to reduce cost and energy consumption further, alleviate the energy shortage increasingly sharpened and ecological deterioration is asked
Topic, countries in the world are the most all at the camshaft new preparation technology exploring and developing material-saving, energy-saving and environmental protection actively.
Powder metallurgy is a kind of to collect material and part forming is prepared in the green technology of preparing of one, have material-saving,
Energy-conservation, lightweight, the advantage such as pollution-free.Powder metallurgy camshaft, is to develop on the basis of PM technique
Novel camshaft, the preparation technology flow process of its routine is: first camshaft is divided into mandrel, powder metallurgy
Multiple split parts such as cam, axle journal, are then entered by welding, elastic conjunction, all multi-methods such as bonded
Row combination is fastenedly connected, and obtains powder metallurgy camshaft blank, and cam shaft blank is again through following process (example
Such as grinding, turning etc.) powder metallurgy camshaft finished product axle can be obtained.Powder metallurgy combined camshaft excellent
Point include: wearability is good, material-saving, energy-conservation, lightweight, flexible design etc..
But, the class powder metallurgy camshaft used as axle journal for mandrel local, because of its axle journal position
There is of a relatively high hardness requirement, in addition to above-mentioned operation, in addition it is also necessary to additionally mandrel is carried out Quenching Treatment,
Significantly extend technological process, add energy resource consumption.Meanwhile, after quenching there is certain deformation in mandrel, and
Hardness is higher, machines cutter for same service life reduction, is unfavorable for using elastic conjunction, bonded etc. to size
The cold connected mode that required precision is high.It addition, quenching technical also can collide with each other with the thermal joining process such as welding,
And affect the hardness at axle journal position.
Therefore, above-mentioned existing powder metallurgy camshaft preparation technology makes as axle journal for preparing mandrel local
Powder metallurgy camshaft, there is the problems such as technological process length, technology stability is poor, energy resource consumption is high.
Summary of the invention
It is an object of the invention to overcome the above-mentioned P/M cam caused because the particular stiffness of mandrel requires
The problem that axle preparation technology flow process extends, technology stability declines, energy consumption is high, and a kind of powder metallurgy is provided
Combined sintering formula camshaft and preparation method thereof.
A kind of powder metallurgy combined sintering formula camshaft that the present invention provides, it is characterised in that: this camshaft
Mandrel material is steel alloy or the high-carbon steel etc. of carbon content more than 0.6%, after merge sintering with cam set,
Mandrel hardness HRC more than 20, the part of mandrel can use directly as the axle journal of camshaft.
The cam of described powder metallurgy camshaft can be iron-base powder metallurgy material, matrix powder metallurgical material,
Aluminum base powder metallurgy material, Ni based powder metallurgy material etc..
The present invention also provides for the preparation method of above-mentioned powder metallurgy combined sintering formula camshaft, it is characterised in that:
First pressed powder metallurgy cam；Then P/M cam is combined on mandrel；Afterwards built-up shaft is put
Enter the sintered operation of sintering furnace, under the high temperature conditions, P/M cam welded together with mandrel sintering,
The metallurgical binding of close and firm can be formed, then through the speed of 10～300 DEG C/min between P/M cam and mandrel
Degree is cooled to room temperature, it is thus achieved that powder metallurgy combined sintering formula cam shaft blank.Cam shaft blank adds through follow-up again
Work (such as grinding, turning etc.) can obtain camshaft finished product axle.Above-mentioned sintering process is: sintering temperature
1000 DEG C～1280 DEG C, sintering time 10～20 minutes, sintering atmosphere is reducing atmosphere or vacuum.
In said method, the gap control of the endoporus of described powder metallurgy pressing cam green compact and mandrel (steel pipe)
System is in the range of 0.01～2.0mm.
When above-mentioned P/M cam is combined on mandrel, the fixed form of cam phase angle may is that fixture
Fixing, alignment pin is fixed or by processing the modes such as groove on mandrel.
Camshaft provided by the present invention and preparation technology have the advantage that whole preparation technology flow process only includes
Compacting cam, combine, sinter, four master operations of following process can complete the preparation of camshaft, technique
Simply, material-saving, energy-saving effect are obvious；Have that wearability is good, material-saving, advantage that pollution is few.Through quickly
After cooling, mandrel hardness can reach the scope of HRC more than 20, and enables the part of mandrel directly to use
Make axle journal, eliminate mandrel quenching technical, shorten technological process, reduce energy consumption, reduce cost, and
And simplify cam shaft design.
Detailed description of the invention
The following examples can make those skilled in the art be more completely understood by the present invention, but not with any side
Formula limits the present invention.
Embodiment 1
WillT8 steel as mandrel material, carry out surface sand-blasting rust cleaning, oil removing, cleaning etc.
Process.Employing chemical composition is C2%, Cr4%, Ni2%, Mo1%, Cu2%, remaining be the mixing of Fe
Powder carries out being pressed into the cam of the interior big 0.2mm of boring ratio outside diameter of mandrel under 600MPa, then by cam sleeve
To mandrel, and steel fixture is used to fix cam phase angle and supporting cam wheel axle.Afterwards, built-up shaft is existed
Temperature is 1100 DEG C, the time is 20 minutes, be sintered, through the cooling speed of 20 DEG C/min under hydrogen atmosphere
Degree is down to room temperature, prepares the powder metallurgy camshaft blank of mandrel hardness about HRC 40.Blank axle is through grinding machine
Powder metallurgy camshaft is obtained after grinding.
Embodiment 2
Will65Mn steel as mandrel material, carry out surface sand-blasting rust cleaning, oil removing, cleaning
Deng process.Dowel hole is opened in the position laying cam at mandrel, for positioning cam sheet position and phase angle.
Employing chemical composition is C2%, Cr4%, Ni2%, Mo1%, Cu2%, remaining be that the mixed-powder of Fe exists
Carry out being pressed into the cam of the interior big 0.1mm of boring ratio outside diameter of mandrel under 600MPa, and cam possess with on mandrel
The structure that dowel hole is mutually matched.Then by cam sleeve to mandrel, and alignment pin is used to fix cam phase
Parallactic angle.Afterwards, by built-up shaft temperature be 1150 DEG C, the time be 20 minutes, be sintered under hydrogen atmosphere,
It is down to room temperature through the rate of cooling of 25 DEG C/min, prepares the P/M cam of mandrel hardness about HRC 30
Axis blank.Blank axle is after grinding machine, it is thus achieved that powder metallurgy camshaft.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention not office
Being limited to this, any those familiar with the art, can be easily in the technical scope that the invention discloses
The change expected or replacement, all should contain within protection scope of the present invention.Therefore, the protection of the present invention
Scope should be as the criterion with scope of the claims.
Claims (6)
1. a powder metallurgy combined sintering formula camshaft, it is characterised in that: the mandrel material of this camshaft
For steel alloy or the high-carbon steel of carbon content more than 0.6%, after merge sintering with cam set, mandrel hardness
HRC more than 20, the part of mandrel can use directly as the axle journal of camshaft；
First pressed powder metallurgy cam；Then P/M cam is combined on mandrel；Afterwards will combination
Axle is put into sintering furnace sintered operation and is welded together with mandrel sintering by P/M cam, then warp
The speed of 10～300 DEG C/min is cooled to room temperature, it is thus achieved that powder metallurgy combined sintering formula cam shaft blank, cam
Axis blank can obtain camshaft finished product axle through following process again；Wherein, sintering process is: sintering temperature
1000 DEG C～1280 DEG C, sintering time 10～20 minutes；The endoporus of described powder metallurgy pressing cam green compact with
The clearance control of mandrel is in the range of 0.01～2.0mm.
Powder metallurgy combined sintering formula camshaft the most according to claim 1, it is characterised in that: institute
The cam stating powder metallurgy camshaft is iron-base powder metallurgy material, matrix powder metallurgical material, aluminum-based powder
Metallurgical material or Ni based powder metallurgy material.
3. the preparation method of a powder metallurgy combined sintering formula camshaft, it is characterised in that: first suppress
P/M cam；Then P/M cam is combined on mandrel；Afterwards built-up shaft is put into sintering furnace
P/M cam is welded together, then through 10～300 DEG C/min's by sintered operation with mandrel sintering
Speed is cooled to room temperature, it is thus achieved that powder metallurgy combined sintering formula cam shaft blank, cam shaft blank is again through follow-up
Processing can obtain camshaft finished product axle；Wherein, sintering process is: sintering temperature 1000 DEG C～1280 DEG C, burns
Knot time 10～20 minutes；The described endoporus of powder metallurgy pressing cam green compact and the clearance control of mandrel exist
In the range of 0.01～2.0mm.
Preparation method the most according to claim 3, it is characterised in that: sintering atmosphere is reproducibility gas
Atmosphere or vacuum.
Preparation method the most according to claim 3, it is characterised in that: described following process includes mill
Cut, turning.
Preparation method the most according to claim 3, it is characterised in that: described P/M cam group
When closing on mandrel, the fixed form of cam phase angle is: fixture is fixed, alignment pin is fixed or passes through
The mode of groove is processed on mandrel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210580145.4A CN103899372B (en) | 2012-12-27 | 2012-12-27 | A kind of powder metallurgy combined sintering formula camshaft and preparation method thereof |
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| CN201210580145.4A CN103899372B (en) | 2012-12-27 | 2012-12-27 | A kind of powder metallurgy combined sintering formula camshaft and preparation method thereof |
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| CN103899372A CN103899372A (en) | 2014-07-02 |
| CN103899372B true CN103899372B (en) | 2016-09-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550969B (en) * | 2014-12-30 | 2017-05-17 | 北京有色金属研究总院 | Combined sintering and connecting method of ends of power metallurgy camshaft |
| CN105149594A (en) * | 2015-08-31 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy cam and preparation method thereof |
| CN109622975B (en) * | 2018-12-29 | 2021-05-11 | 北京有研粉末新材料研究院有限公司 | Powder metallurgy combined sintering type plunger pump cylinder body and preparation method thereof |
| CN112355310B (en) * | 2020-11-12 | 2021-09-28 | 三阳纺织有限公司 | Method for manufacturing cam part and application in textile machinery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4664706A (en) * | 1985-04-30 | 1987-05-12 | Miba Sintermetall Aktiengesellschaft | Sintered shrink-on cam and process of manufacturing such cam |
| CN2052045U (en) * | 1989-07-13 | 1990-01-31 | 山东省莱阳市粉末冶金厂 | Camshaft for combined interanl combustion engine |
| US5016348A (en) * | 1988-10-10 | 1991-05-21 | Sinterstahl Gesellschaft M.B.H. | Process for the manufacture of a tubular crankshaft |
| CN102191960A (en) * | 2010-03-10 | 2011-09-21 | 通用汽车环球科技运作有限责任公司 | Camshaft including weight reducing features and method of forming |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937215A (en) * | 1982-08-26 | 1984-02-29 | Toyota Motor Corp | Camshaft joined by sintering process |
| CN101368250A (en) * | 2008-09-08 | 2009-02-18 | 四川大学 | Rare earth additive high-carbon content cam material and powder metallurgy combined hollow camshaft |
-
2012
- 2012-12-27 CN CN201210580145.4A patent/CN103899372B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4664706A (en) * | 1985-04-30 | 1987-05-12 | Miba Sintermetall Aktiengesellschaft | Sintered shrink-on cam and process of manufacturing such cam |
| US5016348A (en) * | 1988-10-10 | 1991-05-21 | Sinterstahl Gesellschaft M.B.H. | Process for the manufacture of a tubular crankshaft |
| CN2052045U (en) * | 1989-07-13 | 1990-01-31 | 山东省莱阳市粉末冶金厂 | Camshaft for combined interanl combustion engine |
| CN102191960A (en) * | 2010-03-10 | 2011-09-21 | 通用汽车环球科技运作有限责任公司 | Camshaft including weight reducing features and method of forming |
Non-Patent Citations (1)
| Title |
|---|
| 粉末冶金凸轮轴;铃木保雄，郭占哲;《车用发动机》;19870831;第51-53页、56页 * |
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Owner name: BEIJING HENGYUAN TIANQIAO POWDER METALLURGICAL CO. Free format text: FORMER OWNER: BEIJING CENTRAL INST.OF THE NONFERROUS METAL Effective date: 20150507 Free format text: FORMER OWNER: GRIPM ADVANCED MATERIALS (BEIJING) CO., LTD. BEIJING HENGYUAN TIANQIAO POWDER METALLURGICAL CO., LTD. Effective date: 20150507 |
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Effective date of registration: 20150507 Address after: 100088 Beijing city Xicheng District Xinjiekou Avenue No. 2 Applicant after: BEIJING HENGYUAN TIANQIAO POWDER METALLURGY CO., LTD. Address before: 100088 Beijing city Xicheng District Xinjiekou Avenue No. 2 Applicant before: General Research Institute for Nonferrous Metals Applicant before: Gripm Advanced Materials (Beijing) Co., Ltd. Applicant before: BEIJING HENGYUAN TIANQIAO POWDER METALLURGY CO., LTD. |
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Address after: 101 407 No. 3 Yanqi Road, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Beijing Youyan Powder New Materials Research Institute Co., Ltd. Address before: 100088 Beijing city Xicheng District Xinjiekou Avenue No. 2 Patentee before: BEIJING HENGYUAN TIANQIAO POWDER METALLURGY CO., LTD. |