CN204729143U - A kind of engine cam - Google Patents
A kind of engine cam Download PDFInfo
- Publication number
- CN204729143U CN204729143U CN201520364856.7U CN201520364856U CN204729143U CN 204729143 U CN204729143 U CN 204729143U CN 201520364856 U CN201520364856 U CN 201520364856U CN 204729143 U CN204729143 U CN 204729143U
- Authority
- CN
- China
- Prior art keywords
- matrix
- working surface
- engine cam
- camshaft
- wear resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of engine cam, comprise matrix and working surface, working surface passes through the direct cladding of welding manner on matrix; Wherein, matrix is different from working surface material, and working surface is the powder metallurgy layer with better wear resistance, and matrix is have the powder metallurgy matrix compared with obdurability.The utility model has the saving cost of raw material, simplifies production technology, effectively improves the advantage of product work face wear resistance and matrix toughness contradiction.
Description
Technical field
The utility model relates to engine cam technical field, is specifically related to a kind of engine cam.
Background technique
Camshaft is parts in piston engine, and its effect is the opening and closing action controlling valve, needs to bear very large moment of torsion and wear resistance, therefore designs the requirement of squadron's camshaft in intensity, hardness and support very high.Because valve motion rule is related to power and the service performance of a motor, therefore camshaft design in the design process of motor in occupation of very consequence.The main body of camshaft is a cylindrical barred body identical with cylinder block length, has several cams side by side above, for driving valve.One end of wheel shaft is bearings point, and the other end is connected with driving wheel, and the side of cam is peach-shaped, and object is the open and close action completing valve within the time short as far as possible, ensures the sufficient air inlet of cylinder and exhaust.
Prior art generally adopts chilled cast iron, hard cast iron and steel material to manufacture one-piece camshaft, or manufactures cam with powder metallurgical technique, and seamless steel pipe manufactures mandrel, manufactures assembled camshaft by the method for welding, sintering, machinery.The problem of one-piece camshaft is that the requirement realizing weight reduction is very difficult, and in order to alleviate the weight of camshaft, processing cost is very high; In the wear resistance improving cam peach-shaped outer surface, it manufacture is also very difficult technical problem.In addition, one-piece camshaft is unfavorable for improving performance and adopting many air valve structures.Assembled camshaft is in weight reduction, cut down finished cost and improve performance and adopt many air valve structures aspect to make moderate progress, but the working surface of the cam manufactured due to existing means of a powder metallurgy technique and matrix adopt same material, complete under the same processing conditions, be difficult to take into account the wear resistance of working surface and the toughness of matrix simultaneously.
Model utility content
Goal of the invention: for the deficiencies in the prior art, the utility model proposes a kind of engine cam, possesses the toughness of wear resistance and matrix simultaneously.
Technological scheme: in order to realize foregoing invention object, the technical solution adopted in the utility model is:
A kind of engine cam, comprise matrix and working surface, the direct cladding of described working surface is on matrix; Wherein, matrix is different from working surface material, and working surface is the powder metallurgy layer with better wear resistance, and matrix is have the powder metallurgy matrix compared with obdurability.
Described matrix is the overall structure in peach-shaped.
In the middle of described matrix, be provided with axis hole for being connected with camshaft, axis hole is provided with tooth.
The side of described matrix is provided with 2 holes.
Described working surface is located at the apical location of matrix.
Described working surface thickness is 1 ~ 2mm.
The powder metallurgy raw material of described matrix consists of: iron: surplus, copper: 1 ~ 5%, nickel: 1 ~ 5%, carbon: 0 ~ 0.8%, impurity: be not more than 2%.
The powder metallurgy raw material of described working surface consists of: nickel: surplus, iron: 0 ~ 5%, carbon: 0 ~ 0.8%, silicon: 2.5 ~ 7.5%, boron: 0.5 ~ 3.0%, impurity: be not more than 2%.
A processing method for described engine cam, the metallurgical each component of mixed-powder, is then shaped on 160 tons of forming machines, and 1120 DEG C ± 10 DEG C sinter 30 ± 10 minutes, and 820 DEG C ± 10 DEG C are quenched 80 ± 10 minutes; 180 DEG C ± 10 DEG C tempering 60 ± 10 minutes; Laser melting coating working surface, laser power 2 ~ 8KW, cladding speed 4 ~ 20mm/s, powder feed rate 10 ~ 100g/min, argon gas or nitrogen protection atmosphere; Grinding.
Beneficial effect: compared with prior art, characteristics and innovation point of the present utility model is as follows: the utility model has the saving cost of raw material, simplifies production technology, effectively improves the advantage of product work face wear resistance and matrix toughness contradiction.
Accompanying drawing explanation
Fig. 1 is the structural representation of engine cam;
Fig. 2 is the sectional view of engine cam;
Fig. 3 is the side view of engine cam.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As depicted in figs. 1 and 2, engine cam comprises matrix 1 and working surface 2, and matrix 1 is the overall structure in peach-shaped, and centre is provided with axis hole 3 for being connected with camshaft, and axis hole 3 is provided with tooth 4, and the side of matrix 1 is provided with 2 holes 5.Working surface 2 is located at the apical location of matrix 1, is linked into an integrated entity by welding manner and matrix 1.Working surface 2 is for having the powder metallurgy layer of fine wear-resisting property, and thickness is 1 ~ 2mm.Matrix 1 is for having the powder metallurgy matrix compared with obdurability.
The powder metallurgy raw material of matrix 1 consists of: iron: surplus, copper: 1 ~ 5%, nickel: 1 ~ 5%, carbon: 0 ~ 0.8%, impurity: 2% is maximum.
The powder metallurgy raw material of working surface 2 consists of: 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 this engine cam is: the metallurgical each component of mixed-powder, is then shaped on 160 tons of forming machines, and 1120 DEG C ± 10 DEG C sinter 30 ± 10 minutes, and 820 DEG C ± 10 DEG C are quenched 80 ± 10 minutes; 180 DEG C ± 10 DEG C tempering 60 ± 10 minutes; Laser melting coating working surface, laser power 2 ~ 8KW, cladding speed 4 ~ 20mm/s, powder feed rate 10 ~ 100g/min, argon gas or nitrogen protection atmosphere; Grinding.
The wear resistance of cam and toughness are measured by the index of hardness and open loop intensity, and concrete outcome is as follows:
1) hardness: surface hardness: HV
10400 ~ 650; 0.1 ~ 0.5 degree of depth hardness: HV
0.2550 is minimum; 0.9 degree of depth hardness: HV
0.2520 is minimum; Centre hardness: HV
10370 is minimum.
2) open loop intensity: collapsing force: 35000 newton are minimum; Displacement amount: 0.35 millimeter minimum.
3) wear resistance: the camshaft manufactured by this method is always dressed up engine assembly and tests, the camshaft wear test time that result is shaped compared with ordinary powder metallurgical technology promotes 40 ~ 50%.
4) toughness: the camshaft manufactured by this method is always dressed up engine assembly and tests, the camshaft wear test time that result is shaped compared with ordinary powder metallurgical technology promotes 10 ~ 20%.
Claims (6)
1. an engine cam, is characterized in that, comprises matrix (1) and working surface (2), and the direct cladding of described working surface (2) is on matrix (1); Wherein, matrix (1) is different from working surface (2) material.
2. engine cam according to claim 1, is characterized in that: described matrix (1) is the overall structure in peach-shaped.
3. engine cam according to claim 2, is characterized in that: in the middle of described matrix (1), be provided with axis hole (3) for being connected with camshaft, axis hole (3) is provided with tooth (4).
4. engine cam according to claim 1, is characterized in that: on the side of described matrix (1), be provided with 2 holes (5).
5. engine cam according to claim 1, is characterized in that: described working surface (2) is located at the apical location of matrix (1).
6. engine cam according to claim 1, is characterized in that: described working surface (2) thickness is 1 ~ 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520364856.7U CN204729143U (en) | 2015-06-01 | 2015-06-01 | A kind of engine cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520364856.7U CN204729143U (en) | 2015-06-01 | 2015-06-01 | A kind of engine cam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204729143U true CN204729143U (en) | 2015-10-28 |
Family
ID=54387502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520364856.7U Expired - Fee Related CN204729143U (en) | 2015-06-01 | 2015-06-01 | A kind of engine cam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204729143U (en) |
-
2015
- 2015-06-01 CN CN201520364856.7U patent/CN204729143U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20200601 |