CN104879179B - A kind of engine cam and its processing method - Google Patents
A kind of engine cam and its processing method Download PDFInfo
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- CN104879179B CN104879179B CN201510290112.XA CN201510290112A CN104879179B CN 104879179 B CN104879179 B CN 104879179B CN 201510290112 A CN201510290112 A CN 201510290112A CN 104879179 B CN104879179 B CN 104879179B
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- working face
- engine cam
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Abstract
The invention discloses a kind of engine cam and its processing method, which includes matrix and working face, and working face is linked into an integrated entity by welding manner and matrix；Wherein, matrix is different from working face material, and working face is the powder metallurgy layer with preferable wearability, and matrix is the powder metallurgy matrix with high-tenacity.The processing method is first mixed-powder metallurgy each component, is then shaped, and is sintered, heat treatment, laser melting coating, and grinding is connect with mandrel.The present invention, which has, saves the cost of raw material, simplifies production technology, is effectively improved the advantage of product working face wearability and matrix toughness contradiction.
Description
Technical field
The present invention relates to engine cam technical fields, and in particular to a kind of engine cam and its processing method.
Background technology
Camshaft is a component in piston engine, its effect is to control unlatching and the closed action of valve, is needed
Very big torque and wearability are born, therefore very high to requirement of the camshaft in terms of intensity, hardness and support in design.By
It is related to the power and service performance of an engine, therefore camshaft design is in the design of engine in valve motion rule
In occupation of highly important status in journey.The main body of camshaft is a cylindrical barred body identical with air cylinder group length, above
There are several cams side by side, for driving valve.One end of wheel shaft is bearings point, and the other end is connect with driving wheel, cam
Side be in peach-shaped, it is therefore intended that in the shortest possible time complete valve open and close action, ensure the sufficient air inlet of cylinder
And exhaust.
The prior art is generally using chilled cast iron, hard cast iron and steel material manufacture one-piece camshaft or with powder smelting
Gold process manufactures cam, seamless steel pipe manufacture mandrel, by welding, being sintered, the method for machinery manufacture assembled camshaft.It is whole
The problem of formula camshaft, is that the requirement of realization mitigation weight is extremely difficult, and in order to mitigate the weight of camshaft, processing cost is non-
Chang Gao；It is also the technical issues of being difficult in terms of the wearability for improving cam peach-shaped outer surface, in manufacture.In addition, monoblock type is convex
Wheel shaft is unfavorable for improving performance and uses more air valve structures.Assembled camshaft is mitigating weight, reduces processing cost and carries
It makes moderate progress in terms of high-performance and the more air valve structures of use, but the working face of the cam due to the manufacture of existing PM technique
With matrix using identical material, complete under the same processing conditions, it is difficult to take into account simultaneously working face wearability and matrix it is tough
Property.
Invention content
Goal of the invention：For the deficiencies in the prior art, the present invention proposes a kind of engine cam, is provided simultaneously with resistance to
The toughness of mill property and matrix.It is a further object of the present invention to provide a kind of processing methods of above-mentioned engine cam.
Technical solution：In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is：
A kind of engine cam, including matrix and working face, the direct cladding of the working face is on matrix；Wherein, base
Body is different from working face material, and working face is the powder metallurgy layer with preferable wearability, and matrix is the powder with high-tenacity
Last metallurgy matrix.
The matrix is the whole structure in peach-shaped.
Axis hole is equipped among the matrix for being connected with camshaft, axis hole is equipped with tooth.
2 holes are equipped on the side of described matrix.
The working face is located at the apical location of matrix.
The work face thickness is 1~2mm.
The powder metallurgy raw material of described matrix forms：Iron：Surplus, copper：1~5%, nickel：1~5%, carbon：0~0.8%,
Impurity：No more than 2%.
The powder metallurgy raw material of the working face forms：Nickel：Surplus, iron：0~5%, carbon：0~0.8%, silicon：2.5~
7.5%, boron：0.5~3.0%, impurity：No more than 2%.
A kind of processing method of the engine cam, mixed-powder metallurgy each component, then on 160 tons of forming machines
Forming, 1120 DEG C ± 10 DEG C are sintered 30 ± 10 minutes, and 820 DEG C ± 10 DEG C quench 80 ± 10 minutes；180 DEG C of ± 10 DEG C of tempering 60 ±
10 minutes；Laser melting coating working face, 2~8KW of laser power, cladding 4~20mm/s of speed, 10~100g/min of powder feed rate,
Argon gas or nitrogen protection atmosphere；Grinding.
Advantageous effect：Compared with prior art, characteristic of the invention and innovative point are as follows：The present invention, which has, saves raw material
Cost simplifies production technology, is effectively improved the advantage of product working face wearability and matrix toughness contradiction.
Description of the drawings
Fig. 1 is the structure diagram of engine cam；
Fig. 2 is the sectional view of engine cam；
Fig. 3 is the side view of engine cam.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, engine cam includes matrix 1 and working face 2, and matrix 1 is the whole structure in peach-shaped,
Centre is equipped with axis hole 3 for being connected with camshaft, and axis hole 3 is equipped with tooth 4, and 2 holes 5 are equipped on the side of matrix 1.Working face
2 are located at the apical location of matrix 1, are linked into an integrated entity by welding manner and matrix 1.Working face 2 is with fine wear-resisting property
Powder metallurgy layer, thickness be 1~2mm.Matrix 1 is the powder metallurgy matrix with high-tenacity.
The powder metallurgy raw material of matrix 1 forms：Iron：Surplus, copper：1~5%, nickel：1~5%, carbon：0~0.8%, it is miscellaneous
Matter：2% is maximum.
The powder metallurgy raw material of working face 2 forms：Nickel：Surplus, iron：0~5%, carbon：0~0.8%, silicon：2.5~
7.5%, boron：0.5~3.0%, impurity：2% is maximum.
The preparation process of the engine cam is：Then mixed-powder metallurgy each component shapes on 160 tons of forming machines,
1120 DEG C ± 10 DEG C are sintered 30 ± 10 minutes, and 820 DEG C ± 10 DEG C quench 80 ± 10 minutes；180 DEG C ± 10 DEG C are tempered 60 ± 10 points
Clock；Laser melting coating working face, 2~8KW of laser power, cladding 4~20mm/s of speed, 10~100g/min of powder feed rate, argon gas
Or nitrogen protection atmosphere；Grinding.
The wearability and toughness of cam are measured by the index of hardness and open loop intensity, and concrete outcome is as follows：
1) hardness：Case hardness：HV10400~650；0.1~0.5 depth hardness：HV0.2550 is minimum；0.9 depth is hard
Degree：HV0.2520 is minimum；Centre hardness：HV10370 is minimum.
2) open loop intensity：Destructive power：35000 newton are minimum；Displacement：0.35 millimeter of minimum.
3) wearability：The camshaft general assembly manufactured by this method is tested into engine assembly, it is as a result relatively common
The camshaft abrasion test time of PM technique forming promotes 40~50%.
4) toughness：The camshaft general assembly manufactured by this method is tested into engine assembly, as a result compared with common flour
The camshaft abrasion test time of last metallurgical technology forming promotes 10~20%.
Claims (6)
1. a kind of engine cam, which is characterized in that including matrix (1) and working face (2), the working face (2) is directly molten
It overlays on matrix (1)；Wherein, matrix (1) is different from working face (2) material, and working face (2) is the powder with preferable wearability
Metallurgy layer, matrix (1) are the powder metallurgy matrix with high-tenacity；The powder metallurgy raw material of described matrix (1) forms：
Iron：Surplus, copper：1~5%, nickel：1~5%, carbon：0~0.8%, impurity：No more than 2%；The powder smelting of the working face (2)
Golden raw material forms：Nickel：Surplus, iron：0~5%, carbon：0~0.8%, silicon：2.5~7.5%, boron：0.5~3.0%, impurity：
No more than 2%；The engine cam is prepared by following methods：The powder metallurgy each component of mixed matrix, Ran Hou
It is shaped on 160 tons of forming machines, 1120 DEG C ± 10 DEG C are sintered 30 ± 10 minutes, and 820 DEG C ± 10 DEG C quench 80 ± 10 minutes；180℃
± 10 DEG C are tempered 60 ± 10 minutes；Laser melting coating working face, 2~8KW of laser power, cladding 4~20mm/s of speed, powder feed rate
10~100g/min, argon gas or nitrogen protection atmosphere；Grinding.
2. engine cam according to claim 1, it is characterised in that：The matrix (1) is the whole knot in peach-shaped
Structure.
3. engine cam according to claim 2, it is characterised in that：Axis hole (3) is equipped among the matrix (1)
For being connected with camshaft, axis hole (3) is equipped with tooth (4).
4. engine cam according to claim 1, it is characterised in that：2 holes are equipped on the side of described matrix (1)
(5)。
5. engine cam according to claim 1, it is characterised in that：The working face (2) is located at the tip of matrix (1)
Position.
6. engine cam according to claim 1, it is characterised in that：Working face (2) thickness is 1~2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290112.XA CN104879179B (en) | 2015-06-01 | 2015-06-01 | A kind of engine cam and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290112.XA CN104879179B (en) | 2015-06-01 | 2015-06-01 | A kind of engine cam and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104879179A CN104879179A (en) | 2015-09-02 |
| CN104879179B true CN104879179B (en) | 2018-06-22 |
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ID=53946829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510290112.XA Active CN104879179B (en) | 2015-06-01 | 2015-06-01 | A kind of engine cam and its processing method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734556A (en) * | 2016-02-29 | 2016-07-06 | 扬州意得机械有限公司 | Surface densification processing method for powder metallurgy part |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297797A (en) * | 2000-09-14 | 2001-06-06 | 四川大学 | Cam shaft of iron-base surface composite material and its manufacture |
| CN103032120A (en) * | 2011-09-29 | 2013-04-10 | 北京有色金属研究总院 | Powder metallurgy multiple mounted cam sheet and manufacturing method thereof |
| CN103498154A (en) * | 2013-09-05 | 2014-01-08 | 江苏翌煜能源科技发展有限公司 | Laser cladding method for surface of automobile engine camshaft |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000192110A (en) * | 1998-12-22 | 2000-07-11 | Honda Motor Co Ltd | Manufacture of cam shaft |
| JP2006283576A (en) * | 2005-03-31 | 2006-10-19 | Nippon Piston Ring Co Ltd | Valve gear of internal combustion engine |
| CN104525861B (en) * | 2014-11-18 | 2016-12-07 | 西安理工大学 | Engine cam and preparation method thereof |
-
2015
- 2015-06-01 CN CN201510290112.XA patent/CN104879179B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297797A (en) * | 2000-09-14 | 2001-06-06 | 四川大学 | Cam shaft of iron-base surface composite material and its manufacture |
| CN103032120A (en) * | 2011-09-29 | 2013-04-10 | 北京有色金属研究总院 | Powder metallurgy multiple mounted cam sheet and manufacturing method thereof |
| CN103498154A (en) * | 2013-09-05 | 2014-01-08 | 江苏翌煜能源科技发展有限公司 | Laser cladding method for surface of automobile engine camshaft |
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| Publication number | Publication date |
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| CN104879179A (en) | 2015-09-02 |
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