CN101539040A - Valve tappet - Google Patents
Valve tappet Download PDFInfo
- Publication number
- CN101539040A CN101539040A CN200910098204A CN200910098204A CN101539040A CN 101539040 A CN101539040 A CN 101539040A CN 200910098204 A CN200910098204 A CN 200910098204A CN 200910098204 A CN200910098204 A CN 200910098204A CN 101539040 A CN101539040 A CN 101539040A
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- CN
- China
- Prior art keywords
- tappet
- cold
- steel
- valve tappet
- end surface
- 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.)
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Abstract
The invention relates to a valve tappet which is characterized in that cold-formed special steel Ocr4NiMoV (LJ steel) is selected as a material, the inner cavity of a cold-extrusion formed tappet has high precision and low roughness, the end surface of the tappet is coated with a high wear-resistant material which is cemented carbide or ceramic. The shape of the tappet is formed by cold extrusion, thus greatly reducing working procedures, improving the production efficiency, and reducing the influence factors on the quality of the product simultaneously; and the end surface of the tappet is coated with the high wear-resistant material to increase the wear resistance of the end surface of the tappet, thus prolonging the service life of the product.
Description
Technical field
The invention belongs to technical field of engines, relate in particular to a kind of valve tappet.
Technical background
Valve tappet is the important component part of engine valve actuating mechanism, following flow process is taked in the processing of valve tappet usually: blanking → forge → rough turn cylindrical, end face → thick, finish turning inner chamber → corase grind cylindrical → quenching, tempering → partly finish grind cylindrical → nitrocarburizing → correct grinding cylindrical etc., well-known machining processes is many more, the factor that then influences valve tappet output and quality is just many more, especially the quality of valve tappet, it directly influences the effective utilization and the life-span of motor.
Summary of the invention
The invention provides a kind of valve tappet, the factors that its purpose is many at present valve tappet manufacturing procedure, influence product yield and quality are many and put forward.
Technical solution of the present invention is as follows:
1, adopt cold forming special-purpose steel Ocr4NiMoV (LJ steel), its Chemical composition is C :≤0.08; Mn:＜0.3; Si:＜0.2; Cr:3.6-4.2; Ni:0.3-0.7; Mo:0.2-0.6; V:0.08-0.15, this Carbon Content Of Steel is very low, thereby plasticity excellence, resistance of deformation are low.
2, cold extrusion shaped, described LJ steel can carry out cold-extrusion shaping smoothly after annealing, the tappet inner chamber precision height that the cold-extruded platen press is shaped, and roughness is low.Inner chamber and cylindrical behind cold-extrusion shaping without roughing.
3, Carburization Treatment, end face spraying high abrasion resisting material is gone up grinding machine correct grinding cylindrical, end face at last.Described high abrasion resisting material is cemented carbide, pottery etc., than customary quenching, the wear-resisting 5-10 of nitrogenize doubly.Thereby improved the working life of motor.
Useful fruit of the present invention is:
1, the tappet shape has significantly reduced operation by cold-extrusion shaping, has improved prouctiveness greatly, significantly reduces the factor that influences quality of product simultaneously.
2, tappet end face spraying high abrasion resisting material increases the wear resistance of tappet end face, thereby prolongs the working life of product.
Embodiment
It is C that raw material of the present invention adopt cold forming special-purpose steel Ocr4NiMoV (LJ steel) Chemical composition of latest domestic development :≤0.08; Mn:＜0.3; Si:＜0.2; Cr:3.6-4.2; Ni:0.3-0.7; Mo:0.2-0.6; V:0.08-0.15; This Carbon Content Of Steel is very low, thereby plasticity excellence, resistance of deformation are low.Can carry out cold-extrusion shaping smoothly after annealing, with the tappet inner chamber precision height that the cold-extruded platen press is shaped, roughness is low.Inner chamber and cylindrical behind cold-extrusion shaping without roughing, can directly carry out Carburization Treatment, afterwards at tappet end face spraying high abrasion resisting material, as cemented carbide, pottery etc., go up at last grinding machine correct grinding tappet cylindrical and end face and get final product, idiographic flow is as follows: blanking → cold-extrusion shaping → carburizing → end face spraying high abrasion resisting material → correct grinding cylindrical, end face.Flow process before is: blanking → forge → rough turn cylindrical, end face → thick, finish turning inner chamber → corase grind cylindrical → quenching, tempering → partly finish grind cylindrical → nitrocarburizing → correct grinding cylindrical, compare with it, and production capacity of the present invention is higher, and the factor that influences quality of product is also less.
Claims (2)
1, a kind of valve tappet, its major character are that material is cold forming special-purpose steel Ocr4NiMoV (a LJ steel), and its Chemical composition is C :≤0.08; Mn:＜0.3; Si:＜0.2; Cr:3.6-4.2; Ni:0.3-0.7; Mo:0.2-0.6; V:0.08-0.15, the tappet inner chamber precision height of cold-extrusion shaping, roughness are low, and the tappet end face is coated with high abrasion resisting material.
2,, it is characterized in that described high abrasion resisting material is cemented carbide or pottery according to the described a kind of valve tappet of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910098204A CN101539040A (en) | 2009-04-30 | 2009-04-30 | Valve tappet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910098204A CN101539040A (en) | 2009-04-30 | 2009-04-30 | Valve tappet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101539040A true CN101539040A (en) | 2009-09-23 |
Family
ID=41122410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910098204A Pending CN101539040A (en) | 2009-04-30 | 2009-04-30 | Valve tappet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101539040A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517619A (en) * | 2011-12-09 | 2012-06-27 | 芜湖杰锋汽车动力系统有限公司 | Processing method of mechanical tappet structure |
| CN107717470A (en) * | 2017-10-31 | 2018-02-23 | 徐州工程学院 | Compound super abrasive splined shaft extrusion die |
| CN114232043A (en) * | 2021-12-22 | 2022-03-25 | 潍柴动力股份有限公司 | Valve surface treatment method and valve |
-
2009
- 2009-04-30 CN CN200910098204A patent/CN101539040A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517619A (en) * | 2011-12-09 | 2012-06-27 | 芜湖杰锋汽车动力系统有限公司 | Processing method of mechanical tappet structure |
| CN102517619B (en) * | 2011-12-09 | 2014-07-16 | 杰锋汽车动力系统股份有限公司 | Processing method of mechanical tappet structure |
| CN107717470A (en) * | 2017-10-31 | 2018-02-23 | 徐州工程学院 | Compound super abrasive splined shaft extrusion die |
| CN114232043A (en) * | 2021-12-22 | 2022-03-25 | 潍柴动力股份有限公司 | Valve surface treatment method and valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090923 |