CN1058237A - Modular cast iron cam shaft and manufacture method thereof - Google Patents
Modular cast iron cam shaft and manufacture method thereof Download PDFInfo
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- CN1058237A CN1058237A CN 91105144 CN91105144A CN1058237A CN 1058237 A CN1058237 A CN 1058237A CN 91105144 CN91105144 CN 91105144 CN 91105144 A CN91105144 A CN 91105144A CN 1058237 A CN1058237 A CN 1058237A
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- remelting
- cast
- camshaft
- cam
- cast iron
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Abstract
The present invention adopts the spheroidal graphite cast iron block cast of specific composition to form, and through rare gas element electric arc and remelting profiling machine cam face is carried out the remelting hardening processing, has solved the gear quenching problem and has satisfied the counter-bending fatigue strength requirement of integral shaft.Improved the wear resistance of camshaft, block resistance, antistrip performance.
Description
The present invention relates to a kind of engine cam and manufacture method thereof.
At present, the material of camshaft generally forms or adopts non-alloy gray cast-iron or spheroidal graphite cast iron casting system to form with the forging of high-quality punching block both at home and abroad.The structure of camshaft mostly is overhead camshaft, does not comprise overall gear, and gear installs from camshaft one end.In order to guarantee wear resistance, when making camshaft, the forged steel camshaft adopts quench hardening, non-alloy gray cast-iron camshaft adopt more the cold shock casting and in recent years since the surface remelting method for curing of West Germany's employing.But aforesaid method is unsuitable for block cast camshaft (being that gear and camshaft block cast are one), because the forged steel camshaft is not wear-resisting, the life-span is low.Cold shock casting camshaft expense costliness because the high chill of cost can only lean on manual could putting in the casting mold reliably to go so far, makes the still manque hope of trial of this castingprocesses automatization.And the gray iron remelting technology of West Germany can't resolve block cast cam shaft gear technological problems (the easy hardening crack of gray iron gear) and the counter-bending fatigue strength of integral shaft.Ductile iron material composition and manufacturing process that the present invention selects for use are not seen precedent both at home and abroad.
The purpose of this invention is to provide a kind of high life, the spheroidal graphite cast iron block cast camshaft that wear resisting property is good.
Another object of the present invention provides a kind of simple to operate, and cost is low, is convenient to realize the manufacture method of the ductile iron camshaft that mechanize is produced, and can make camshaft obtain better comprehensive performance.
The present invention is achieved in that and adopts Chemical Composition to be: C3.6～3.9%, Si1.8～2.7%, Mn0.3～1.0%, P＜0.05%, S＜0.03%, Cr≤0.5%, as cast condition matrix are pearlite matrix+10～15% ferrites, and the spheroidal graphite cast iron monoblock casting of casting cementite＜3% becomes to comprise the camshaft of gear.Its manufacture method comprises moulding, smelting, cast, machining, and steps such as remelting hardening are used the remelting profiling machine that cam face is carried out remelting hardening and handled.The remelting parameter is 5～20 volts of voltages, 30～100 amperes in electric current, 3～6 cubic metres/minute of indifferent gas flows, 2.5 minutes/week of cam travelling speed, high temperature source horizontal scanning rate 10 mm/second.
The invention will be further described below in conjunction with one embodiment of the present of invention and accompanying drawing: Fig. 1 is a structural representation of the present invention, Fig. 2 is example for the present invention's operational diagram on the remelting profiling machine with Beijing BJ492Q85 horsepower engine camshaft, selecting Chemical Composition for use is C3.6%, Si2.5%, Mn0.4%, P0.03%, S0.02% Cr0.5%, the as cast condition matrix is pearlite matrix+10% ferrite, the casting cementite is 3%, 1～2 grade of nodulizing grade, the spheroidal graphite cast iron monoblock casting that the spheroidal graphite size is 6～7 grades becomes to comprise overall gear 2, cam 1, the block cast camshaft of the shaft shoulder 3.Its manufacture method is after the block cast camshaft is carried out turning processing (made allowance 0.5mm), on the remelting profiling machine remelting hardening to be carried out on cam 1 surface and handle.Utilize 7000 ° of K high-temperature electric arc thermals source not melt tungsten electrode 4,, obtain the hardened wear-resistant layer of surface 1～1.5mm, hardness HRC53～62 cam 1 surface remelting through rare gas element (argon gas) protection cam face liquid bath.The remelting parameter is: 10～15 volts of voltages, 50～100 amperes in electric current, 3～6 cubic metres/minute of indifferent gas flows, 2.5 minutes/all high temperature source horizontal scanning rate 10 mm/second of cam operation circumferential speed.Owing to adopt the ductile iron camshaft 10 of special component and the variation of remelting parameter, give slow cooling operation after heat, the remelting before the remelting thereby saved, be better than West Germany's gray iron remelting processing.That magnesium iron block cast cam shaft gear 2 adopts is high, intermediate frequency flank of tooth quenching HRC51～57 or normalizing treatment HB260～280, solved the gray iron gear quenching easily split problem and satisfy axis body counter-bending fatigue strength require σ-1 〉=20kg/mm
2
The present invention has the following advantages:
1, through bench test and actual road test, improve 2～3 times than chilled Alloy Cast lron Camshaft anti-wear performance, satisfy the requirement of high speed high load capacity operating mode.
2, have good anti-scuffing function concurrently, block resistance, anti-bite is hindered, the toughness and tenacity of anti-strip.
3, adopt monoblock casting to solve the requirement of the counter-bending fatigue strength of overall gear quenching and axis body.
4, operating procedure simple, save man-hour, cost is low.
Claims (3)
1, a kind of modular cast iron cam shaft, it is characterized in that adopting Chemical Composition to be: C3.6～3.9%, Si1.8～2.7%, Mn0.3～1.0%, P＜0.05%, S＜0.03%, Cr≤0.5%, the as cast condition matrix is pearlite matrix 10～15% ferrite, and the spheroidal graphite cast iron monoblock casting of casting cementite＜3% becomes to comprise the camshaft of gear 2.
2, a kind of method of making magnesium iron block cast camshaft, comprise steps such as moulding, smelting, cast, machining, remelting hardening, it is characterized in that using the remelting profiling machine that remelting hardening is carried out on cam 1 surface handles, the remelting parameter is: 5～20 volts of voltages, 30～100 amperes in electric current, 3～6 cubic metres/minute of indifferent gas flows, 2.5 minutes/week of cam travelling speed, high temperature source horizontal scanning rate 10 mm/second.
3, method according to claim 2 is characterized in that block cast cam shaft gear 2 adopts height, the intermediate frequency flank of tooth to quench or normalizing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105144 CN1023494C (en) | 1991-07-31 | 1991-07-31 | Modular cast iron cam shaft and its making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105144 CN1023494C (en) | 1991-07-31 | 1991-07-31 | Modular cast iron cam shaft and its making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1058237A true CN1058237A (en) | 1992-01-29 |
| CN1023494C CN1023494C (en) | 1994-01-12 |
Family
ID=4907007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91105144 Expired - Fee Related CN1023494C (en) | 1991-07-31 | 1991-07-31 | Modular cast iron cam shaft and its making method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023494C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088248A (en) * | 2011-11-01 | 2013-05-08 | 张玉新 | Formula of nodular cast iron used in automotive gear ring bracket |
| CN104235166A (en) * | 2014-08-27 | 2014-12-24 | 湖北省丹江口丹传汽车传动轴有限公司 | Automobile power output shaft assembly and machining method thereof |
| CN104959793A (en) * | 2015-06-29 | 2015-10-07 | 安庆市吉安汽车零件锻轧有限公司 | Camshaft argon arc remelting production and machining process |
| CN109266953A (en) * | 2018-10-30 | 2019-01-25 | 湖南红宇耐磨新材料股份有限公司 | A kind of low manganese antifriction cast iron abrading-ball or mill section and preparation method thereof |
-
1991
- 1991-07-31 CN CN 91105144 patent/CN1023494C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088248A (en) * | 2011-11-01 | 2013-05-08 | 张玉新 | Formula of nodular cast iron used in automotive gear ring bracket |
| CN104235166A (en) * | 2014-08-27 | 2014-12-24 | 湖北省丹江口丹传汽车传动轴有限公司 | Automobile power output shaft assembly and machining method thereof |
| CN104959793A (en) * | 2015-06-29 | 2015-10-07 | 安庆市吉安汽车零件锻轧有限公司 | Camshaft argon arc remelting production and machining process |
| CN109266953A (en) * | 2018-10-30 | 2019-01-25 | 湖南红宇耐磨新材料股份有限公司 | A kind of low manganese antifriction cast iron abrading-ball or mill section and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1023494C (en) | 1994-01-12 |
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Address after: 100022, No. 3, unit 7, 52 floor, Nong Guang, Chaoyang District, Beijing Applicant after: Du Qing Address before: Beijing City, Haidian District Zhuang Xiang Zhuang Village Applicant before: Zhang Jihu Applicant before: Jiang Lianrong |
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Free format text: CORRECT: APPLICANT; FROM: ZHANG JIHU; JIANG LIANRONG TO: ZHU QING |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |