CN105119145A - Spark plug production technique - Google Patents
Spark plug production technique Download PDFInfo
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- CN105119145A CN105119145A CN201510510687.8A CN201510510687A CN105119145A CN 105119145 A CN105119145 A CN 105119145A CN 201510510687 A CN201510510687 A CN 201510510687A CN 105119145 A CN105119145 A CN 105119145A
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Abstract
Provided is a spark plug production technique which comprises the following steps of: inserting a central electrode into a shaft hole in an insulator; fixedly disposing a housing on the surface of the insulator in a sleeving manner; measuring the vertical distance C between the front end face of the central electrode and the front end face of the housing; and fixedly connecting a ground electrode with the housing, locating a part of the ground electrode at a projection surface T formed by projecting the front end face of the central electrode onto the front end face of the housing, enabling the part of the ground electrode and the central electrode to form the minimum distance X between the ground electrode and the central electrode, and using the minimum distance X as an ignition gap, wherein the minimum distance X is equal to the vertical distance C. The minimum distance X between the ground electrode and the central electrode is set as the easily-measured vertical distance C between the front end face of the central electrode and the front end face of the housing so that it is guaranteed that the ignition gap is equal to the vertical distance C so as to be accurately measured.
Description
Technical field
The present invention relates to a kind of igniter and production technology thereof, particularly relate to a kind of spark plug and production technology thereof.
Background technology
According to the difference of the position relationship of central electrode, insulator, housing, grounding electrode in prior art, the structure type of spark plug is also different, the end of central electrode can be divided in housing with outside housing, and the end of central electrode is in insulator and outside insulator, grounding electrode, in housing and outside housing, is so combined into multiple spark plug configuration type.But production technology more ripe in prior art only for center electrode end be arranged on the outer and housing of insulator outward, grounding electrode is also arranged on a kind of spark plug configuration outside housing.
Above-mentioned traditional spark plug production technology is: loaded by central electrode in the axis hole of insulator, the leading section of central electrode is arranged on insulator exterior, glass-sealing agent is filled into axis hole, again screw rod is inserted axis hole, overall spark plug is put into stove high temperature sintering, so, the relative position of central electrode and insulator is fixed.Again housing is set in outside insulator and rivets, then the ignition gap adjustment between grounding electrode and central electrode is carried out to spark plug.Usually, the pad of one and default ignition gap consistency of thickness is placed between central electrode and grounding electrode, again grounding electrode is bent, the operation such as pressurization, central electrode, pad and grounding electrode three are close to, finally extracted out by pad, the distance between central electrode and grounding electrode is exactly default igniting spacing.But this production technology is only applicable to central electrode and all exposed situation of grounding electrode, once central electrode is in housing, just cannot adjust ignition gap by common method.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of spark plug production technology, its igniting spacing that can be arranged on the spark plug of enclosure interior to central electrode accurately measures, improves the outgoing of spark plug, improves the operation stability of internal combustion engine.
To achieve these goals, this invention takes following concrete technical scheme:
A kind of spark plug production technology, comprises the following steps:
A. central electrode is inserted in the axis hole in insulator;
B. sealant is filled in the axis hole of described insulator;
C. screw rod is inserted in the axis hole of described insulator;
D. high temperature sintering insulator, make one end and the screw rod end thereof contacts of central electrode, and described central electrode and insulator is fixed;
E. housing fixed cover is located at insulator surface, makes the leading section of the leading section of described insulator and described central electrode all be positioned at described housing;
F. the vertical range C between the front end face of described central electrode and the front end face of described housing is measured;
G. grounding electrode is fixedly connected with housing, on the perspective plane T that the front end face that the front end face making the part of described grounding electrode be positioned at described central electrode is projected on described housing is formed, and making this part of described grounding electrode and described central electrode form minimum range X between this grounding electrode and central electrode using as ignition gap, namely the size of this ignition gap X equals described vertical range C.
Spark plug production technology of the present invention, by grounding electrode is fixedly connected with housing forward end face, and by the minimum range X between grounding electrode and central electrode, be set to the vertical range C in central electrode front end face and the housing forward end face that can be convenient for measuring, ensure that ignition gap is this vertical range C, and then accurately can measure ignition gap.
Further, in described step f, measure the vertical range C between the front end face of described central electrode and the front end face of described housing, and the product of measuring distance outside predeterminable range scope is rejected.
In spark plug production process, conveniently eliminate the product not meeting default ignition distance or further process is processed to substandard product, ensure that the precision of ignition gap, improving the outgoing of spark plug, improving the operation stability of internal combustion engine.
Further, described grounding electrode is parallel with the front end face of described housing is fixedly close to.
Further, the front end face of described central electrode exposes to the leading section of insulator; Or the front end face of described central electrode is positioned at insulator.
Further, the part that described grounding electrode is positioned at T place, described perspective plane is provided with projection or through hole.
Further, described grounding electrode is strip, and it is at least fixedly connected with housing one end; Or described grounding electrode is circular, its cylindrical place and housing fixed seal connection.
The present invention also provides a kind of spark plug:
A kind of spark plug, comprising:
Insulator, it has the axis hole extended in the axial direction;
Central electrode, it inserts and runs through the axis hole of described insulator;
Housing, it is hollow columnar, and this housing fixed cover is located at described insulator surface;
Grounding electrode;
The leading section of described insulator and the front end face of described central electrode are all positioned at described housing; Described grounding electrode is fixedly connected with described housing, on the perspective plane T that the front end face that the front end face making the part of described grounding electrode be positioned at described central electrode is projected on described housing is formed, and making this part of described grounding electrode and described central electrode form minimum range X between this grounding electrode and central electrode using as ignition gap, namely the size of this ignition gap X equals described vertical range C.
Further, described grounding electrode is parallel with the front end face of described housing is fixedly close to.
Further, the front end face of described central electrode exposes to the leading section of insulator or is positioned at described insulator.
Further, described grounding electrode is strip, and it is at least fixedly connected with housing one end; Or described grounding electrode is circular, its cylindrical place and housing fixed seal connection.
In order to understand better and implement, describe the present invention in detail below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the structure cutaway view of the spark plug of the embodiment of the present invention one;
Fig. 2 is the upward view of the spark plug of the embodiment of the present invention one;
Fig. 3 is the partial sectional view of the spark plug of the embodiment of the present invention one;
Fig. 4 is the partial sectional view of the spark plug of the embodiment of the present invention two;
Fig. 5 is the part-structure cutaway view of the spark plug of the embodiment of the present invention three;
Fig. 6 is the upward view of the spark plug of the embodiment of the present invention three;
Fig. 7 is the part-structure cutaway view of the spark plug of the embodiment of the present invention four;
Fig. 8 is the upward view of the spark plug of the embodiment of the present invention four;
Fig. 9 is the upward view of the spark plug of the embodiment of the present invention five;
Figure 10 is the structure cutaway view of the spark plug of the embodiment of the present invention six.
Embodiment
embodiment one
See Fig. 1 and Fig. 2, it is respectively structure cutaway view and the upward view of the spark plug of the embodiment of the present invention one, Fig. 1 is the cutaway view (Fig. 2 does not draw gap, glass-sealing agent 5 place) of A-A in Fig. 2, and the spark plug that the embodiment one of spark plug production technology of the present invention is produced comprises housing 1, insulator 2, central electrode 3, grounding electrode 4, sealant 5 and screw rod 6.
This insulator 2 has the axis hole 22 extended in the axial direction, and central electrode 3 inserts and runs through this axis hole 22.Central electrode 3 end comparatively close with grounding electrode 4 is its leading section 31a, and this leading section 31a protrudes from the leading section of this insulator 2, and therefore the front end face 31 of central electrode 3 is positioned at the outside of insulator 2.This housing 1 is hollow columnar, and it is set in the surface of insulator 2, makes the leading section of insulator 2 be arranged in housing 1, and meanwhile, the front end face 31 of this central electrode 3 is positioned at this housing 1, and now the front end face of insulator 2 does not contact with grounding electrode 4.In other implementations, the front end face of insulator 2 can contact with grounding electrode 4.
Please refer to Fig. 3, it is the partial sectional view of the spark plug of the embodiment of the present invention one, and the front end face 31 of this central electrode is C with the vertical range in housing forward end face 11, and front end face 31 upright projection of central electrode is in formation perspective plane, housing forward end face T.This grounding electrode 4 is bar shaped, and it is parallel with housing forward end face 11 is fixedly close to, and a part for grounding electrode 4 is positioned on the T of perspective plane, and namely the part that grounding electrode is positioned on the T of this perspective plane forms fixed range C with central electrode 3.Owing to defining the minimum range X between this grounding electrode and central electrode between this part on the T of perspective plane of grounding electrode 4 and central electrode 3, and then grounding electrode 4 and central electrode 3 are lighted a fire at this place, form the ignition gap of fixed range, the size of this ignition gap is vertical range C.
Based on the structural design of above-mentioned spark plug, the present invention further provides a kind of production technology accurately can measuring the spark plug in plug ignition gap, specifically comprise the following steps:
A. central electrode 3 is inserted in the axis hole 22 extended in the axial direction in insulator 2, and make the leading section 31a of central electrode expose insulator 2;
B. glass-sealing agent 5 is filled in the axis hole 22 of insulator;
C. screw rod 6 is inserted in the axis hole 22 of insulator;
D. the insulator fixing through above-mentioned steps is carried out high temperature sintering, described glass-sealing agent is melted, makes this central electrode one end and screw rod end thereof contacts, and be fixed in insulator;
E. housing 1 be set in insulator 2 surface and fix, making the leading section 31a of central electrode be positioned at insulator exterior, make the front end face 31 of central electrode expose to the leading section of insulator;
F. measure the distance between the front end face 31 of actual central electrode and the front end face 11 of housing, if this distance is identical with the ignition distance preset, then this spark plug is labeled as qualified product, undesirable spark plug is rejected.
G. be fixedly connected with housing 1 by grounding electrode 4, particularly, grounding electrode 4 is parallel with the front end face 11 of housing to be fixedly close to; Minimum range X between central electrode and grounding electrode equals vertical range C, and on the perspective plane T that formed of the front end face that the front end face that the part of grounding electrode is positioned at central electrode is projected on housing, with the ignition gap making grounding electrode and described central electrode form fixed range, namely the size of this ignition gap equals vertical range C.
Now, due to the minimum range X between the front end face 31 of central electrode and grounding electrode 4, just equal the front end face 31 of central electrode and the vertical range C in housing forward end face 11.And this vertical range C can be measured by simple instrument, and then can by measuring vertical range C, learn the minimum range X between central electrode and grounding electrode, this minimum range X is the ignition gap of spark plug.By measuring vertical range C, overcome the technical problem cannot measured the ignition gap of the spark plug that central electrode is in housing in prior art.
In addition, just to locating, (namely this grounding electrode is positioned at the part on the T of perspective plane) can arrange projection (not shown in FIG.) at the front end face 31 of grounding electrode and central electrode, ignition distance is now less than normal, lights a fire rapider.
embodiment two
Refer to Fig. 4, it is the partial sectional view of the spark plug of the embodiment of the present invention two.Embodiment two is substantially identical with embodiment three, only there is following difference: grounding electrode 4f is that bending is rectangular, its bossing 4f1 is positioned on the T of perspective plane, the minimum range X of its recessed portion 4f2 and central electrode 3 is greater than C, therefore the minimum range X-shaped of grounding electrode 4f and central electrode 3 is formed between the bossing of grounding electrode 4f and central electrode front end face 31, and namely this minimum range X equals vertical range C.
In other embodiments, grounding electrode 4 also can be other shapes, as long as the distance between the part of grounding electrode 4 on the T of perspective plane and central electrode 3 forms the minimum range X between this grounding electrode and central electrode, can ensure that grounding electrode 4 and central electrode 3 form the ignition gap of fixed range, namely the size of this ignition gap equals vertical range C.In Fig. 4, the position gone out represented by round dot, all C is less than with the distance of central electrode 3, only needing grounding electrode 4 (except being arranged in the part on the T of perspective plane) not to be positioned at this round dot shaded side, can ensure that the minimum range of grounding electrode 4 and central electrode 3 is formed between the part of grounding electrode on the T of perspective plane and central electrode.In addition, this figure is plane graph, and in reality, the position being less than C with central electrode distance forms a three-dimensional shape, and grounding electrode 4 (except being positioned at the part on the T of perspective plane) only need be positioned at except the space of this three-dimensional shape.
embodiment three
See the part-structure cutaway view that Fig. 5 and Fig. 6, Fig. 5 are spark plugs, Fig. 6 is the upward view of spark plug.Embodiments of the invention three are substantially identical with embodiment one, and difference is only: grounding electrode 4b is strip, and its two ends are connected with housing end face respectively, and its width is less than the diameter of central electrode.So, the plane parallel at grounding electrode and housing end face place, and after arcing, spark discharges by the space of grounding electrode both sides.
embodiment four
See the part-structure cutaway view that Fig. 7 and Fig. 8, Fig. 7 are spark plugs, Fig. 8 is the upward view of spark plug.Embodiments of the invention four are substantially identical with embodiment one, difference is only: grounding electrode 4c is rectangular shape, its width is greater than the diameter of central electrode, it has through hole 4c1, this through hole is coaxial with central electrode 3, after making central electrode and grounding electrode produce arcing, spark can discharge from through hole fast.And the diameter of this through hole 4c1 is less than the diameter of central electrode 3, the part of grounding electrode 4c is positioned on the T of perspective plane.
embodiment five
See Fig. 9, it is the upward view of spark plug.Embodiments of the invention five are substantially identical with embodiment one, difference is only: the cross section of grounding electrode 4d is annulus, its cylindrical place is connected with housing end face, its center has through hole 4d1, this through hole is coaxial with central electrode 3, after making central electrode and grounding electrode produce arcing, spark can discharge from through hole fast.And the diameter of this through hole 4d1 is less than the diameter of central electrode 3, the part of grounding electrode 4d is positioned on the T of perspective plane.
embodiment six
See Figure 10, it is the structure cutaway view of spark plug.Embodiments of the invention six are substantially identical with embodiment one, and difference is only: the leading section 31e of central electrode is positioned at insulator 2, make the front end face of central electrode be positioned at insulator 2.In the present embodiment, the operation principle of spark plug is identical with embodiment one, grounding electrode and central electrode 3 form the ignition gap of fixed range, and the size of this ignition gap is vertical range C, and namely central electrode 3 is positioned at insulator or insulator all can realize goal of the invention of the present invention outward.In addition, grounding electrode shape size the scheme that can adopt in above-described embodiment one to five is set.
Spark plug of the present invention and production technology thereof, by grounding electrode is fixedly connected with housing forward end face, and by the minimum range X between grounding electrode and central electrode, be set to the vertical range C in central electrode front end face and the housing forward end face that can be convenient for measuring, ensure that ignition gap is this vertical range C, and then accurately can measure ignition gap.Further, in spark plug production process, the convenient superseded product not meeting default ignition distance, ensure that the precision of ignition gap, improves the outgoing of spark plug, improve the operation stability of internal combustion engine.
The present invention is not limited to above-mentioned execution mode, if do not depart from the spirit and scope of the present invention to various change of the present invention or distortion, if these are changed and distortion belongs within claim of the present invention and equivalent technologies scope, then the present invention is also intended to comprise these changes and distortion.
Claims (10)
1. a spark plug production technology, is characterized in that: comprise the following steps:
A. central electrode is inserted in the axis hole in insulator;
B. sealant is filled in the axis hole of described insulator;
C. screw rod is inserted in the axis hole of described insulator;
D. high temperature sintering insulator, make one end and the screw rod end thereof contacts of central electrode, and described central electrode and insulator is fixed;
E. housing fixed cover is located at insulator surface, makes the front end face of the leading section of described insulator and described central electrode all be positioned at described housing;
F. the vertical range C between the front end face of described central electrode and the front end face of described housing is measured;
G. grounding electrode is fixedly connected with housing, on the perspective plane T that the front end face that the front end face making the part of described grounding electrode be positioned at described central electrode is projected on described housing is formed, and making this part of described grounding electrode and described central electrode form minimum range X between this grounding electrode and central electrode using as ignition gap, namely the size of this ignition gap X equals described vertical range C.
2. spark plug production technology according to claim 1, it is characterized in that: in described step f, measure the vertical range C between the front end face of described central electrode and the front end face of described housing, and the product of measuring distance outside predeterminable range scope is rejected.
3. spark plug production technology according to claim 1, is characterized in that: described grounding electrode is parallel with the front end face of described housing to be fixedly close to.
4. spark plug production technology according to claim 1, is characterized in that: the front end face of described central electrode exposes to the leading section of insulator; Or the front end face of described central electrode is positioned at insulator.
5. spark plug production technology according to any one of claim 1 to 4, is characterized in that: the part that described grounding electrode is positioned at T place, described perspective plane is provided with projection or through hole.
6. spark plug production technology according to any one of claim 1 to 4, is characterized in that: described grounding electrode is strip, and it is at least fixedly connected with housing one end; Or described grounding electrode is circular, its cylindrical place and housing fixed seal connection.
7. a spark plug, comprising:
Insulator, it has the axis hole extended in the axial direction;
Central electrode, it inserts and runs through the axis hole of described insulator;
Housing, it is hollow columnar, and this housing fixed cover is located at described insulator surface;
Grounding electrode;
It is characterized in that: the leading section of described insulator and the front end face of described central electrode are all positioned at described housing; Described grounding electrode is fixedly connected with described housing, on the perspective plane T that the front end face that the front end face making the part of described grounding electrode be positioned at described central electrode is projected on described housing is formed, and making this part of described grounding electrode and described central electrode form minimum range X between this grounding electrode and central electrode using as ignition gap, namely the size of this ignition gap X equals described vertical range C.
8. spark plug according to claim 7, is characterized in that: described grounding electrode is parallel with the front end face of described housing to be fixedly close to.
9. spark plug according to claim 7, is characterized in that: the front end face of described central electrode exposes to the leading section of insulator; Or the front end face of described central electrode is positioned at insulator.
10. the spark plug according to any one of claim 7 to 9, is characterized in that: described grounding electrode is strip, and it is at least fixedly connected with housing one end; Or described grounding electrode is circular, its cylindrical place and housing fixed seal connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510510687.8A CN105119145B (en) | 2015-08-19 | 2015-08-19 | A kind of spark plug and its production technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510510687.8A CN105119145B (en) | 2015-08-19 | 2015-08-19 | A kind of spark plug and its production technology |
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| CN105119145A true CN105119145A (en) | 2015-12-02 |
| CN105119145B CN105119145B (en) | 2017-07-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1227982A (en) * | 1998-03-03 | 1999-09-08 | 日本特殊陶业株式会社 | Equipment and method for producing spark plug |
| CN101558536A (en) * | 2007-03-26 | 2009-10-14 | 日本特殊陶业株式会社 | Spark plug |
| US20120256531A1 (en) * | 2009-12-23 | 2012-10-11 | Jochen Fuchs | Spark plug having a hole for adjustment |
| CN103140999A (en) * | 2010-10-01 | 2013-06-05 | 日本特殊陶业株式会社 | Spark plug |
| CN103718399A (en) * | 2011-08-03 | 2014-04-09 | 罗伯特·博世有限公司 | Spark plug |
| CN205070159U (en) * | 2015-08-19 | 2016-03-02 | 张蝶儿 | Spark plug |
-
2015
- 2015-08-19 CN CN201510510687.8A patent/CN105119145B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1227982A (en) * | 1998-03-03 | 1999-09-08 | 日本特殊陶业株式会社 | Equipment and method for producing spark plug |
| CN101558536A (en) * | 2007-03-26 | 2009-10-14 | 日本特殊陶业株式会社 | Spark plug |
| US20120256531A1 (en) * | 2009-12-23 | 2012-10-11 | Jochen Fuchs | Spark plug having a hole for adjustment |
| CN103140999A (en) * | 2010-10-01 | 2013-06-05 | 日本特殊陶业株式会社 | Spark plug |
| CN103718399A (en) * | 2011-08-03 | 2014-04-09 | 罗伯特·博世有限公司 | Spark plug |
| CN205070159U (en) * | 2015-08-19 | 2016-03-02 | 张蝶儿 | Spark plug |
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| Publication number | Publication date |
|---|---|
| CN105119145B (en) | 2017-07-25 |
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