CN105024281A - Spark plug and manufacturing method thereof - Google Patents
Spark plug and manufacturing method thereof Download PDFInfo
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- CN105024281A CN105024281A CN201510359005.8A CN201510359005A CN105024281A CN 105024281 A CN105024281 A CN 105024281A CN 201510359005 A CN201510359005 A CN 201510359005A CN 105024281 A CN105024281 A CN 105024281A
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- ceramic body
- spark plug
- annular groove
- becket
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Abstract
The invention relates to a spark plug and a manufacturing method thereof. The spark plug comprises a central electrode, a ceramic body, and a metal outer shell, wherein the ceramic body is located inside the metal outer shell; the central electrode is located inside the ceramic body; the top part of the metal outer shell is provided with a side electrode matched with the central electrode; an annular groove is arranged on the external circumferential wall at the upper end of the ceramic body; and the annular groove is provided with a metal ring serving as a floating electrode. The problem that the spark plug can not fire and can not work normally as too much carbon is accumulated around the central electrode can be solved, and the service life of the spark plug is greatly improved.
Description
technical field:
The present invention relates to auto parts industry, is for a kind of spark plug and manufacture method thereof in particular.
background technology:
The Main Function of spark plug high-tension current is introduced cylinder in gasoline engine ignition system to produce electric spark, to light the parts of burning mixture.
Now commercially generally having two kinds of spark plugs, is traditional one-sided polar spark plug and many side poles spark plug respectively.The one-sided polar spark plug of tradition has an obvious defect, and namely lateral electrode covers central electrode.When two interpolar electrions, the gaseous mixture at spark gap place is activated by absorption spark heat and because ionization and is formed " fiery core ".The place that fire karyomorphism becomes is generally close to lateral electrode place, and heat will more be absorbed by lateral electrode, i.e. " the flame arrest effect " of electrode, which reduces spark energy, reduce arcing performance.So, in the twenties in last century, there are three side pole spark plugs.Compared with one-sided pole, the spark gap of many side poles is made up of the section (being washed into circular hole) of multiple lateral electrode and the face of cylinder of central electrode, the spark gap of this side putting type eliminates the shortcoming that lateral electrode covers central electrode, add " accessibility " of spark, spark energy is larger, be easier to go deep into cylinder internal, contribute to improving mixture combustion situation and reducing toxic emission.Because many side poles provide multiple arcing passage, thus extend useful life, improve the reliability of igniting.Here must be pointed out, the moment of electric discharge can only be a passage arcing, can not the arcing simultaneously of many side poles.
But, the basic and China Patent No. of existing many side poles spark plug: 03249134.4; Proprietary term: the technology disclosed in spark plug with multi-point ignition is consistent, this technology is very easy to produce carbon distribution between floating electrode and central electrode described in it, cause engine not easily to start, the serious useful life shortening spark plug, and " lacking fire " phenomenon easily occurs when high speed.
Due to the steadiness in the ad-hoc location of transition metal ring and consideration use procedure in prior art, conventional metal working process cannot realize, usually plating and these two kinds of techniques of thermal spraying can only be adopted to realize, electroplating technology production efficiency is extremely low, coating in deposition process owing to there is point discharge phenomenon, Deposit appearance forms many corners, have a strong impact on the becket processing and forming in Liao Hou road and the rate of finished products of product, simultaneously owing to being limited to the limitation of solution composition, be difficult to acquisition possesses high temperature resistant simultaneously, resistant to spark erosion, the becket that resistant to chemical media corrosion material requires.Although and hot-spraying technique easily obtain required by material, but the material-structure of becket belongs to mechanical joining properties, its institutional framework is loosened, and mechanical performance is poor, coating easily occurs that when difference variation is larger crackle even comes off, and has a strong impact on ignition operation and the useful life thereof of spark plug.
summary of the invention:
In order to solve the problems of the technologies described above, the object of the present invention is to provide a kind of spark plug and manufacture method thereof, this spark plug can prevent because of carbon distribution too much causes spark plug can not ignition operation, cause it normally to work; Greatly increase the useful life of spark plug simultaneously.
The present invention is achieved through the following technical solutions:
A kind of spark plug, comprise central electrode, ceramic body, metal shell body, described ceramic body is positioned at metal shell body, described central electrode is positioned at ceramic body, described metal shell body top is provided with the lateral electrode matched with central electrode, described ceramic body upper end periphery wall is provided with annular groove, and described annular groove is provided with one as the becket of floating electrode, and the edge of this becket does not exceed annular groove.
In the embodiment of the present invention, above-mentioned becket carries out spraying through intermittent mode, remelting is formed.
In the embodiment of the present invention, the external diameter of described becket is not less than the ceramic body external diameter being provided with annular groove.
In the embodiment of the present invention, described central electrode stretches out ceramic body end and forms a boss portion.
In the embodiment of the present invention, described ceramic body upper surface is equal with lateral electrode upper surface.
A manufacture method for spark plug, comprises the following steps:
The metallic element of S1, spark plug: metal shell body, central electrode and tail wiring copper nut are made by five metals processing technology and formed;
S2, ceramic body are sintered by mould ceramic molding and form, and form an annular groove at an upper portion thereof when described ceramic body is shaping;
S3, use spray welding process metal injection material in annular groove form a becket;
S4, the ceramic body of becket and other parts there are is to fit together above-mentioned preparation.
In the embodiment of the present invention, in above-mentioned S3: be placed in by ceramic body on spraying equipment, 300 are preheated to the groove position of ceramic body
0c ~ 400
0c, allows ceramic body around central axis slow circumvolve, and the lance ejection of spraying equipment sprays ceramic body annular groove position with the spray bundle of melting or semi-molten state metal dust, and the coating layer thickness of spraying, to after requiring size, is heated to 850 to coating
0c ~ 1150
0c carries out remelting; Coating is again through road mechanical grinding processing later and polishing, and form the becket meeting dimensional requirement, above-mentioned spraying is carried out with intermittent mode.
In the embodiment of the present invention, surfacing metal material in annular groove is self-fluxing alloyed powder.
In the embodiment of the present invention, the lateral electrode in S1 on metal shell selects nickel-bass alloy material.
In the present invention, advantage is compared with prior art:
The becket preparation of ceramic body concave part, mechanical processing technique has conveniently been difficult to the qualified products meeting instructions for use, such as: adopt punching press shrinking process can cause ceramic body fragmentation or crackle; Welding procedure is adopted to be difficult to obtain complete becket; Production efficiency is low, inconvenience obtains required material requirement to adopt electroplating technology to exist; The becket material institutional framework adopting hot-spraying technique to obtain is loose, use in easily there is crackle and come off etc.The present invention adopts metal spray welding technology technique, the intrafascicular metallic of spray is deposited on equably the concave part of ceramic body, the metal coating making it to be formed metallurgical structure character through high temperature reflow is again entrenched on groove tightly, thus obtaining the becket meeting instructions for use completely, the spark plug made by the program can increase the number of times of its igniting greatly.
accompanying drawing illustrates:
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is the schematic diagram of ceramic body in the present invention.
embodiment:
In details hereafter describes, element numbers can be indicated in the diagram of enclosing the some become wherein, and represents with the particular example describing mode of this embodiment practicable.This kind of embodiment can illustrate that enough details are able to tool to implement in order to do making the general skill personage in this field.The person of readding must recognize in the present invention the embodiment that also can utilize other or make under the prerequisite not departing from described embodiment structural, logicality and electrically on change.Therefore, details hereafter describes and will not limit for being considered to be one, otherwise wherein comprised embodiment will be defined by right.
A kind of spark plug, comprise central electrode 1, ceramic body 2, metal shell body 3, described ceramic body is positioned at metal shell body, described central electrode is positioned at ceramic body, described metal shell body top is provided with the lateral electrode 4 matched with central electrode, described ceramic body upper end periphery wall is provided with annular groove 21, and described annular groove is provided with one as the becket 5 of floating electrode.
In a preferred embodiment, above-mentioned becket carries out spraying through intermittent mode, remelting is formed in the present invention; The external diameter of described becket is equal with the ceramic body external diameter being provided with annular groove, also can slightly larger than it, the external diameter design parameter of becket is Φ 6+0.150mm, the external diameter design parameter being provided with annular groove ceramic body is Φ 6mm, concrete with reference to Figure of description, this design can prevent after the carbon distribution of ceramic body top, and floating electrode and central electrode are directly identical, makes spark plug lose ignition function.
Described ceramic body upper surface is equal with lateral electrode upper surface.
Described central electrode stretches out ceramic body end and forms a boss portion 11.
In the present invention, current-limiting circuit for wind-mill generator is made up of central electrode, the becket forming floating electrode and multiple lateral electrode arranged around central electrode, arranges at least three lateral electrode optimums in the present invention.When high-tension electricity of lighting a fire is formed, at central electrode,----transition metal ring---gets multi spot spark between-lateral electrode, form side direction spark, add the exposed area of spark, enhance spark energy, contribute to improving the combustion efficiency of gaseous mixture, the power performance promoting engine and minimizing toxic emission concentration.In use, owing to there being multiple lateral electrodes, define multiple arcing passage, this structure can effectively extending plug useful life and improve igniting reliability.
To in the manufacture method of spark plug in the present invention:
Embodiment one: carry out according to following steps:
The metallic element of S1, spark plug: metal shell body, central electrode and tail wiring copper nut are made by five metals processing technology and formed, and the lateral electrode on metal shell selects nickel-bass alloy material;
S2, ceramic body are sintered by mould ceramic molding and form, and form an annular groove at an upper portion thereof when described ceramic body is shaping;
S3, use plasma spray technology spray a metal material and form a becket in annular groove, and its concrete method is: in above-mentioned S3: be placed in by ceramic body on spraying equipment, is preheated to 300 to the groove position of ceramic body
0c ~ 400
0c, preferably can choose: 300
0c, 330
0c, 350
0c, 400
0c; Allow ceramic body around central axis slow circumvolve, the lance ejection of spraying equipment sprays ceramic body annular groove position with the spray bundle of melting or semi-molten state metal dust, being sprayed on metal material in annular groove is self-fluxing alloyed powder, more specifically the chromium nickel-molybdenum alloy that high temperature resistant, resistance to aura corrodes and chemical corrosion resistance is good is selected in the present embodiment, its concrete trade mark is: 0Cr18Ni16Mo5, in this alloy: quality of materials mark ratio is: carbon content (C)≤0.08%; Chromium (Cr) content 16.5 ~ 19.0%; Nickel (Ni) content 14.5 ~ 18.0%; Molybdenum (Mo) content 4.5 ~ 5.8%; The coating layer thickness of spraying, to after requiring size, is heated to 850 to coating
0c ~ 1150
0c carries out remelting, and make the institutional framework of coating from loosening, the mechanical bond of porous becomes the structural property of continuous, fine and close metallurgical binding, above-mentioned remelting temperature preferably can be chosen: 850
0c, 910
0c, 980
0c, 1050
0c, 1110
0c, 1150
0c; Coating is again through road mechanical grinding processing later and polishing, and the metallic that major requirement is sprayed can not be attached on the periphery wall of ceramic body, and form the becket meeting dimensional requirement, above-mentioned spraying sprays with intermittent mode.
S4, the ceramic body of becket and other parts there are is to fit together the spark plug of formation one finished product above-mentioned preparation.
Embodiment two: carry out according to following steps:
The metallic element of S1, spark plug: metal shell body, central electrode and tail wiring copper nut are made by five metals processing technology and formed, and the lateral electrode on metal shell selects nickel-bass alloy material;
S2, ceramic body are sintered by mould ceramic molding and form, and form an annular groove at an upper portion thereof when described ceramic body is shaping;
S3, use plasma spray technology spray a metal material and form a becket in annular groove, and its concrete method is: in above-mentioned S3: be placed in by ceramic body on spraying equipment, is preheated to 300 to the groove position of ceramic body
0c ~ 400
0c, preferably can choose: 300
0c, 330
0c, 350
0c, 400
0c; Allow ceramic body around central axis slow circumvolve, the lance ejection of spraying equipment sprays ceramic body annular groove position with the spray bundle of melting or semi-molten state metal dust, being sprayed on metal material in annular groove is self-fluxing alloyed powder, more specifically the chromium nickel molybdenum manganese-silicon that high temperature resistant, resistance to aura corrodes and chemical corrosion resistance is good is selected in the present embodiment, its concrete trade mark is 0Cr20Ni42Mo4MnSi, in this alloy: quality of materials mark ratio is: carbon content (C)≤0.08%; Chromium (Cr) content 18.0 ~ 21.0%; Nickel (Ni) content 40.0 ~ 45.0%; Molybdenum (Mo) content 3.5 ~ 4.8%; Manganese (Mn) content≤0.5%; Silicon (Si) content≤0.4%; The coating layer thickness of spraying, to after requiring size, is heated to 850 to coating
0c ~ 1150
0c carries out remelting, and make the institutional framework of coating from loosening, the mechanical bond of porous becomes the structural property of continuous, fine and close metallurgical binding, above-mentioned remelting temperature preferably can be chosen: 850
0c, 905
0c, 970
0c, 1040
0c, 1090
0c, 1150
0c; Coating is again through road mechanical grinding processing later and polishing, and the metallic that major requirement is sprayed can not be attached on the periphery wall of ceramic body, and form the becket meeting dimensional requirement, above-mentioned spraying sprays with intermittent mode.
S4, the ceramic body of becket and other parts there are is to fit together the spark plug of formation one finished product above-mentioned preparation.
Embodiment three: carry out according to following steps:
The metallic element of S1, spark plug: metal shell body, central electrode and tail wiring copper nut are made by five metals processing technology and formed, and the lateral electrode on metal shell selects nickel-bass alloy material;
S2, ceramic body are sintered by mould ceramic molding and form, and form an annular groove at an upper portion thereof when described ceramic body is shaping;
S3, use plasma spray technology spray a metal material and form a becket in annular groove, and its concrete method is: in above-mentioned S3: be placed in by ceramic body on spraying equipment, is preheated to 300 to the groove position of ceramic body
0c ~ 400
0c, preferably can choose: 300
0c, 340
0c, 370
0c, 400
0c; Allow ceramic body around central axis slow circumvolve, the lance ejection of spraying equipment sprays ceramic body annular groove position with the spray bundle of melting or semi-molten state metal dust, being sprayed on metal material in annular groove is self-fluxing alloyed powder, more specifically the chromium nickel molybdenum titanium alloy that high temperature resistant, resistance to aura corrodes and chemical corrosion resistance is good is selected in the present embodiment, its concrete trade mark is 0Cr18Ni34Mo2Ti, in this alloy: quality of materials mark ratio is: carbon content (C)≤0.08%; Chromium (Cr) content 16.5 ~ 19.0%; Nickel (Ni) content 33.0 ~ 35.5%; Molybdenum (Mo) content 1.5 ~ 3.0%; Titanium (Ti) content≤0.1%; The coating layer thickness of spraying, to after requiring size, is heated to 850 to coating
0c ~ 1150
0c carries out remelting, and make the institutional framework of coating from loosening, the mechanical bond of porous becomes the structural property of continuous, fine and close metallurgical binding, above-mentioned remelting temperature preferably can be chosen: 850
0c, 905
0c, 970
0c, 1040
0c, 1090
0c, 1150
0c; Coating is again through road mechanical grinding processing later and polishing, and the metallic that major requirement is sprayed can not be attached on the periphery wall of ceramic body, and form the becket meeting dimensional requirement, above-mentioned spraying sprays with intermittent mode.
S4, the ceramic body of becket and other parts there are is to fit together the spark plug of formation one finished product above-mentioned preparation.
In above-described embodiment, the effect of each metallic element:
Chromium: make material have high strength when high temperature and promote resistance to high temperature corrosion performance.
Nickel: the toughness and the decay resistance that increase material.
Molybdenum: improve material at high temperature tension and Creeps Strength, can make the hardness of material remain unchanged in work red heat situation.
Titanium: when can prevent high temperature, the local of chromium content is reduced, and maintains its anti-corrosion capability, steel alloy can be prevented by brittle phenomenon during high temperature slow cooling.
Manganese: manganese has effect of deoxidation and desulfurization, can improve the plasticity of material.
Silicon: when coexisting with chromium, can improve oxidation-resistance property, improves the corrosion resistance in flue gas.
In general, manufacturing process disclosed by the invention is: ceramic body is formed with ceramic molding sintering by mould; Metal shell, central electrode and tail wiring copper nut are made by five metals processing technology and are formed.Lateral electrode wherein on metal shell selects the nickel-bass alloy material of high temperature resistant, resistance to galvanic corrosion and chemical corrosion.The preparation of ceramic body concave part becket adopts spray welding technology processing, and material selection has high temperature oxidation resisting, the aura of resistance to electric arc corrodes and chromium, nickel, the molybdenum alloy of chemical corrosion.Concrete steps: the spray material of becket selects the self-fluxing alloyed powder that high temperature resistant, resistance to aura corrodes and chemical corrosion resistance is good, and spraying equipment is flame spraying gun, also can be other spraying equipments such as plasma.Ceramic body is placed on spraying equipment, 3000C ~ 4000C is preheated to the groove position of ceramic body, allow ceramic body around central axis slow circumvolve, the lance ejection of thermal spraying sprays ceramic body annular groove position with the spray bundle of melting or semi-molten state metallic, above-mentioned spraying is carried out with intermittent mode, the size seeing becket is specifically needed to confirm the number of times sprayed, it can be secondary, three times, four times the time difference of every minor tick spraying is 20min ~ 30min, preferably 20min, 21.5min, 23min, 25min, 27min, 28.8min, 30min, spraying is once afterwards after the temperature of those metallics is lower than 500C ~ 600C, and again could carry out the spraying of next time, the preferred time is 500C, 530C, 580C, 600C, spray layer thickness, to after requiring size, is heated to 8500C ~ 11500C to coating and carries out remelting, makes the institutional framework of coating from loosening, the mechanical bond of porous becomes the structural property of continuous, fine and close metallurgical binding, coating through road mechanical grinding processing later and polishing, forms the becket meeting dimensional requirement again.Finally by each accessory routinely spark plug production technology be assembled.
The foregoing is only embodiments of the invention, it is also not used to limit scope of patent protection of the present invention.Anyly have the knack of alike those skilled in the art, not departing from spirit of the present invention and scope, the equivalence of the change done and retouching is replaced, and is still in scope of patent protection of the present invention.
Claims (9)
1. a spark plug, comprise central electrode, ceramic body, metal shell body, described ceramic body is positioned at metal shell body, described central electrode is positioned at ceramic body, described metal shell body top is provided with the lateral electrode matched with central electrode, it is characterized in that: described ceramic body upper end periphery wall is provided with annular groove, described annular groove is provided with one as the becket of floating electrode.
2. a kind of spark plug according to claim 1, is characterized in that: above-mentioned becket carries out spraying through intermittent mode, remelting is formed.
3. a kind of spark plug according to claim 1 and 2, is characterized in that: the external diameter of described becket is not less than the ceramic body external diameter being provided with annular groove place.
4., according to the arbitrary described a kind of spark plug of claim 1 ~ 3, it is characterized in that: described central electrode stretches out ceramic body end and forms a boss portion.
5., according to the arbitrary described a kind of spark plug of claim 1 ~ 4, it is characterized in that: described ceramic body upper surface is equal with lateral electrode upper surface.
6. the manufacture method of spark plug as described in claim 1-5, is characterized in that: comprise the following steps:
The metallic element of S1, spark plug: metal shell body, central electrode and tail wiring copper nut are made by five metals processing technology and formed;
S2, ceramic body are sintered by mould ceramic molding and form, and form an annular groove at an upper portion thereof when described ceramic body is shaping;
S3, use spray welding process metal injection material in annular groove form a becket;
S4, the ceramic body of becket and other parts there are is to fit together above-mentioned preparation.
7. the manufacture method of a kind of spark plug according to claim 6, is characterized in that: in above-mentioned S3: be placed in by ceramic body on spraying equipment, is preheated to 300 to the groove position of ceramic body
0c ~ 400
0c, allows ceramic body around central axis slow circumvolve, and the lance ejection of spraying equipment sprays ceramic body annular groove position with the spray bundle of melting or semi-molten state metal dust, and the coating layer thickness of spraying, to after requiring size, is heated to 850 to coating
0c ~ 1150
0c carries out remelting; Coating is again through road mechanical grinding processing later and polishing, and form the becket meeting dimensional requirement, above-mentioned spraying is carried out with intermittent mode.
8. the manufacture method of a kind of spark plug according to claim 7, is characterized in that: surfacing metal material in annular groove is self-fluxing alloyed powder.
9. the manufacture method of a kind of spark plug according to claim 6, is characterized in that: the lateral electrode in S1 on metal shell selects nickel-bass alloy material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510359005.8A CN105024281B (en) | 2015-06-26 | 2015-06-26 | A kind of spark plug and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510359005.8A CN105024281B (en) | 2015-06-26 | 2015-06-26 | A kind of spark plug and its manufacture method |
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| Publication Number | Publication Date |
|---|---|
| CN105024281A true CN105024281A (en) | 2015-11-04 |
| CN105024281B CN105024281B (en) | 2018-02-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0536463A (en) * | 1991-07-30 | 1993-02-12 | Ngk Spark Plug Co Ltd | Spark plug |
| CN1107263A (en) * | 1994-10-17 | 1995-08-23 | 北京新亚太工贸发展公司 | New type spark plug and coating method |
| CN2444321Y (en) * | 2000-12-26 | 2001-08-22 | 厦门市绿茵环保科技有限公司 | Multidirection ionic sparking plug |
| CN2629293Y (en) * | 2003-07-25 | 2004-07-28 | 魏贤章 | Series capacitance ring-shape multi-pole sparking plug |
| CN102832540A (en) * | 2011-06-13 | 2012-12-19 | 汪连志 | Ring-shaped high-energy spark plug |
-
2015
- 2015-06-26 CN CN201510359005.8A patent/CN105024281B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0536463A (en) * | 1991-07-30 | 1993-02-12 | Ngk Spark Plug Co Ltd | Spark plug |
| CN1107263A (en) * | 1994-10-17 | 1995-08-23 | 北京新亚太工贸发展公司 | New type spark plug and coating method |
| CN2444321Y (en) * | 2000-12-26 | 2001-08-22 | 厦门市绿茵环保科技有限公司 | Multidirection ionic sparking plug |
| CN2629293Y (en) * | 2003-07-25 | 2004-07-28 | 魏贤章 | Series capacitance ring-shape multi-pole sparking plug |
| CN102832540A (en) * | 2011-06-13 | 2012-12-19 | 汪连志 | Ring-shaped high-energy spark plug |
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