KR20140058990A - Metal gasket having compound offset structure - Google Patents

Metal gasket having compound offset structure Download PDF

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Publication number
KR20140058990A
KR20140058990A KR1020120125542A KR20120125542A KR20140058990A KR 20140058990 A KR20140058990 A KR 20140058990A KR 1020120125542 A KR1020120125542 A KR 1020120125542A KR 20120125542 A KR20120125542 A KR 20120125542A KR 20140058990 A KR20140058990 A KR 20140058990A
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KR
South Korea
Prior art keywords
plate
metal plate
metal
forming
gas hole
Prior art date
Application number
KR1020120125542A
Other languages
Korean (ko)
Inventor
이종선
박성관
Original Assignee
동아공업 주식회사
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Priority to KR1020120125542A priority Critical patent/KR20140058990A/en
Publication of KR20140058990A publication Critical patent/KR20140058990A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F11/00—Arrangements of sealings in combustion engines 
    • F02F11/002—Arrangements of sealings in combustion engines  involving cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0818—Flat gaskets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0818—Flat gaskets
    • F16J2015/0843—Flat gaskets with an edge portion folded over the plate itself
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Gasket Seals (AREA)

Abstract

Since the grommet structure is formed not only on the inner circumferential portion but also on the outer circumferential portion of the gasket, it is possible to adjust the step difference thickness on both sides, thereby reducing the initial deformation of the mating member and causing a leak on the first grommet side due to excessive thermal deformation of the mating member According to the present invention, in the gasket for forming the sealed case by bending the ends of the upper and lower plates so as to enable the secondary seal with the grommet on the outer circumferential side, And a stepped portion between the bolt portion and the outer peripheral portion is bent in correspondence with the bent thickness of the gas hole so that the stepped portion with respect to the gas hole side can be adjusted.

Description

Technical Field [0001] The present invention relates to a metal gasket having a compound step,

The present invention relates to a metal gasket having a composite step, and more particularly, to a metal gasket having a gas hole through which a high-temperature exhaust gas passes, and a case having a plurality of fastening holes formed at its edge, To a metal gasket having a composite stepped portion forming a stepped portion.

Generally, in order for the engine to operate smoothly, there must be a suction device for sucking the mixer in the cylinder and an exhaust device for discharging the gas after combustion.

The suction device comprises an air cleaner for removing dust and the like in the intake air, and an intake manifold for distributing the mixer to each cylinder.

The exhaust device includes an exhaust manifold for collecting the gas after combustion discharged from each cylinder, an exhaust pipe for exhausting the exhaust gas to the rear of the vehicle, a catalytic converter for purifying harmful components in the exhaust gas, and a muffler for reducing noise during exhaustion .

At this time, the exhaust gas discharged from the engine is purified by the oxidation-reduction action in the catalytic converter through the exhaust muffler through the exhaust manifold, and the purified exhaust gas passes through the center muffler and the main muffler, So that it can be discharged to the outside.

At this time, a connection portion between the exhaust outlet portion of the CCC (Close-Coupled Catalyst) and the front muffler, a connection portion between the front muffler and the UCC (underbody catalytic converter), a connection portion between the UCC and the center muffler, A gasket is indispensably used at a connection portion between the muffler and the main muffler. The size of the gasket is somewhat different depending on the engine, and its shape is similarly used over all vehicle types.

Here, the gasket will be briefly described with reference to FIGS. 1 and 3 attached hereto.

1 and 2, since the gasket used in the exhaust pipe receives heat of exhaust gas at a high temperature, the metal case 20, which is mainly resistant to temperature, and the metal case 10, which protects the metal material 20, .

At this time, a gas hole 11 through which the exhaust gas is discharged is formed in the center of the case 10, and a plurality of fastening holes 12 are formed at the edge of the case 10 to be coupled to the flange of the exhaust pipe.

At this time, the case 10 is provided as a pair of metal thin plates, and the pair of metal thin plates are bonded to each other in a grommet manner.

That is, as shown in a cross-sectional view taken along the line A-A of FIG. 2, the end of the case 10 disposed at the lower part of the drawing is folded and overlapped with the end of the case 10 disposed at the upper part.

The metal material 20 is disposed up to the edge of the case 30.

The above-described conventional technique has a structure in which the grommet is provided at the sealing portion to maintain the seal.

However, as shown in the cross-sectional view of FIG. 3, since the grommet step is adjusted by folding soft material, the step difference between the grommet mounting portion and the grommet is increased due to the thickness difference. The deformation becomes large.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a metal gasket having a composite stepped portion in which a grommet structure is formed not only on the inner circumferential portion but also on the outer circumferential portion of the metal gasket, .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gasket which forms a closed case by bending an end of an upper plate and a lower plate so that a gap between the gasket and the gas hole is adjusted, Wherein at least one of the ends of the bolt portion and the outer peripheral portion is bent.

According to another aspect of the present invention, there is provided a case in which the case is bent with the end of the upper plate wrapping around the end of the lower plate toward the gas hole side, the end of the lower plate is bent with the end of the lower plate wrapping around the end of the upper plate and the end of the lower plate is wrapped around the end of the upper plate. It is preferable to bend.

According to another aspect of the present invention, there is provided a case in which the end of the upper plate is bent with the end of the upper plate wrapping around the end of the lower plate toward the gas hole, the end of the lower plate and the end of the upper plate face each other with the bolt side, It is preferable to bend.

According to another aspect of the present invention, there is provided an air conditioner, comprising: a case having an upper end bent toward the gas hole, a lower end bent toward the lower end of the lower plate, .

According to another aspect of the present invention, there is provided a case in which the upper end of the upper plate is bent with the end of the upper plate wrapping around the end of the lower plate toward the gas hole, the end of the lower plate is bent with the end of the lower plate wrapping around the end of the upper plate, .

Further, according to the present invention, it is preferable that the thickness of the upper plate has a dimension larger than the thickness of the lower plate.

According to the present invention, it is preferable that a space portion is formed between the upper plate and the lower plate at a predetermined interval, and the space portion is filled with the heat-resistant filler.

Further, according to the present invention, it is preferable that the heat-resisting filler is composed of mica or at least one metal plate.

According to the present invention, it is preferable that the metal plate has any one of a full bead, a half bead and a double half bead on one side of the gas hole, between the gas hole and the bolt, and on the outer circumferential side.

Further, according to the present invention, the metal plate may include: an upper metal plate forming a concave full bead; And a lower metal plate forming a convex full bead facing the upper metal plate so as to face the upper metal plate.

According to another aspect of the present invention, there is provided a metal plate comprising: an upper metal plate forming a convex full bead; And a lower metal plate for forming a concave full bead so as to abut against the upper metal plate.

In addition, according to the present invention, the metal plate may include: an upper metal plate forming a recessed full bead to abut the plane of the lower metal plate; And a lower metal plate adjacent to the concave full bead of the upper metal plate and forming a convex full bead to abut the plane of the upper metal plate.

Further, according to the present invention, the metal plate comprises: a planar upper metal plate; And a lower metal plate for forming a convex full bead to correspond to the upper metal plate.

Further, according to the present invention, it is preferable that the metal plate is composed of a metal plate which forms a convex full bead so as to come into contact with the upper plate.

According to another aspect of the present invention, there is provided a metal plate comprising: a top plate portion contacting an upper plate; and a top plate forming an upward inclined surface on both sides of the top plate portion; And a lower metal plate that forms a downward sloped surface on both sides of the lower flat portion.

According to another aspect of the present invention, there is provided a metal plate comprising: a top plate portion contacting an upper plate; and a top plate forming an upward inclined surface on both sides of the top plate portion; It is preferable that it is composed of a flat metal plate.

In addition, according to the present invention, it is preferable that the metal plate is composed of an upper plane portion abutting the upper plate and a metal plate forming an upward inclined plane on both sides of the upper plane portion.

According to another aspect of the present invention, there is provided a metal plate comprising: a top plate portion contacting an upper plate; and a top plate forming an upward inclined surface to one side of the top plate portion; And a lower metal plate which forms a downward sloped surface on one side of the lower flat portion.

According to another aspect of the present invention, there is provided a metal plate comprising: a top plate portion contacting an upper plate; and a top plate forming an upward inclined surface to one side of the top plate portion; It is preferable that it is composed of a flat metal plate.

In addition, according to the present invention, it is preferable that the metal plate is composed of an upper flat portion contacting the upper plate and a metal plate forming an upward inclined surface to one side of the upper flat portion.

Therefore, the metal gasket having the composite step according to the present invention can form a grommet structure not only on the inner periphery but also on the outer periphery of the gasket, so that the thickness of the step on both sides can be adjusted, Even if a leakage occurs on the side of the primary grommet due to excessive thermal deformation of the water, secondary sealing with the grommet on the outer peripheral side is possible and the sealing ability can be further improved.

1 is a plan view of a conventional metal gasket,
FIG. 2 is a cross-sectional view taken along line AA of FIG. 1,
Figure 3 is a cross-sectional view of a metal gasket interposed between mating objects for sealing;
4 is a top view of a metal gasket having a composite step according to an embodiment of the present invention,
5 is a sectional view taken along the line BB of Fig. 4,
FIG. 6 is a cross-sectional view of a metal gasket interposed between counterparts according to an embodiment of the present invention,
7 is a sectional view of a metal gasket having a composite step according to the first embodiment of the present invention,
8 is a sectional view of a metal gasket having a composite step according to a second embodiment of the present invention,
9 is a cross-sectional view of a metallic gasket having a composite step according to a third embodiment of the present invention,
10 is a sectional view of a metal gasket having a composite step according to a fourth embodiment of the present invention,
11 is a cross-sectional view of a metal gasket having a composite step according to a fifth embodiment of the present invention,
12 is a sectional view of a metal gasket having a composite step according to a sixth embodiment of the present invention,
13 is a sectional view of a metallic gasket having a composite step according to a seventh embodiment of the present invention,
14 is a cross-sectional view of a metal plate having a full bead structure of a metal gasket having a composite step according to an embodiment of the present invention,
15 is a sectional view of a metal plate having a double half bead structure of a metal gasket having a composite step according to an embodiment of the present invention,
16 is a sectional view of a metal plate having a half bead structure of a metal gasket having a composite step according to an embodiment of the present invention.

Hereinafter, embodiments of a metal gasket having a composite step of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 4 is a plan view of a metallic gasket having a composite step according to an embodiment of the present invention, FIG. 5 is a sectional view taken along line BB of FIG. 4, Fig.

7 is a cross-sectional view of a metal gasket having a composite step according to the first embodiment of the present invention, FIG. 8 is a cross-sectional view of a metal gasket having a composite step according to a second embodiment of the present invention, Sectional view of a metal gasket having a composite step according to a third embodiment of the present invention.

10 is a cross-sectional view of a metal gasket having a composite step according to a fourth embodiment of the present invention, and Fig. 11 is a sectional view of a metal gasket having a composite step according to the fifth embodiment of the present invention.

12 is a cross-sectional view of a metal gasket having a composite step according to a sixth embodiment of the present invention, FIG. 13 is a sectional view of a metal gasket having a composite step according to the seventh embodiment of the present invention,

14 is a cross-sectional view of a metal plate having a full bead structure of a metal gasket having a composite step according to an embodiment of the present invention, and Fig. 15 is a cross-sectional view of a metal gasket having a double half bead structure 16 is a sectional view of a metal plate having a half bead structure of a metal gasket having a composite step according to an embodiment of the present invention.

4 shows a top view of a gasket according to an embodiment of the present invention.

As shown in the drawings, in the first to fourth embodiments of the present invention, a gasket is formed by a case 100 composed of an upper plate 110 and a lower plate 120.

The case 100 is composed of an upper plate 110 and a lower plate 120 made of a metal material and the upper plate 110 and the lower plate 120 are stacked one above the other, Enclose the end.

Hereinafter, the first to fourth embodiments will be specifically described with reference to FIGS. 7 to 10. FIG.

7 shows a cross-sectional view of a first embodiment of a metallic gasket having a composite step of the present invention.

Hereinafter, a cross-sectional view according to the embodiments of the present invention corresponds to a cross-sectional view taken along line C-C of FIG.

As shown in the drawing, the upper plate 110 is positioned above the lower plate 120, and the upper end of the upper plate 110 is folded while bending the lower end of the lower plate 120 to face the lower surface of the lower plate 120 .

The lower plate 120 is positioned at the lower portion of the upper plate 110 and the lower plate 120 is bent at the lower end of the lower plate 120 to cover the upper end of the upper plate 110 and to be in surface contact with the upper surface of the upper plate 110.

Likewise, the lower plate 120 is positioned at the lower portion of the upper plate 110, and the lower end of the lower plate 120 is bent to cover the upper end of the upper plate 110 to be in surface contact with the upper surface of the upper plate 110.

At this time, the gas hole is a through hole through which the exhaust gas passes, and the fastening hole is a portion where a fastening means such as a bolt is fastened together with the exhaust pipe facing each other.

Assuming that the gas hole portion where the upper plate 110 bends under the lower plate 120 and is in contact with the upper plate 110 is t1 and the portion of the bolt portion where the lower plate 120 is folded upward to be in contact with the upper plate 110 is t2, 110 and the lower plate 120 are different from each other, so that the height of t1 and the height of t2 can be adjusted.

More preferably, the thickness of the upper plate 110 may be larger than the thickness of the lower plate 120 so that the height tl is formed to be equal to or greater than the height t2.

In each of the embodiments described below in the first and second embodiments, the height of the gas hole portion where the upper plate is folded down to the lower plate is larger than the height of the bolted portion where the lower plate is bent over the upper plate, The thickness of the upper plate is formed to be equal to or larger than the thickness of the lower plate.

8 shows a second embodiment of a metallic gasket having a composite step of the present invention.

As shown in the drawing, the upper plate 210 is positioned above the lower plate 220, and the upper end of the upper plate 210 is bent so as to face the lower surface of the lower plate 220, .

The lower plate 220 is positioned at the lower portion of the upper plate 210 so that the lower end of the lower plate 220 is bent to cover the upper end of the upper plate 210 and is in surface contact with the upper surface of the upper plate 210.

The lower plate 220 on the side of the bolt may be formed in a lower portion of the upper plate 210 so that the ends of the lower plate 220 and the upper plate 210 coincide in length.

9, the upper plate 310 or the lower plate 320 is bent in the gas hole and the bolt portion, and the lengths of the ends of the lower plate 320 and the upper plate 310 in the outer circumferential portion coincide with each other So that they can be formed in parallel.

10, the upper plate 410 or the lower plate 420 is bent in the gas hole and the bolt portion, and the lower end of the lower plate 420 is bent downward at the outer periphery of the lower plate 420, Can be formed to interview.

11 to 13 illustrate the fifth to seventh embodiments in which the upper plate and the lower plate are bent at their ends and the heat-resistant filler such as a metal plate or a mica material is inserted into the upper plate and the lower plate.

11, the upper plate 510 is positioned at an upper portion parallel to the lower plate 520 at a predetermined distance, and the upper end of the upper plate 510 is bent below the lower plate 520 toward the gas hole indicated by the Port portion, As shown in Fig.

The lower plate 520 is positioned on the lower side of the upper plate 510 and the lower end of the lower plate 520 is bent over the upper plate 510 to be in surface contact with the upper surface of the upper plate 510.

Likewise, the lower plate 520 is positioned below the upper plate 510, and the lower end of the lower plate 520 is bent over the upper plate 510 to be in surface contact with the upper surface of the upper plate 510.

At this time, the space formed between the upper plate 510 and the lower plate 520 may be filled with the heat-resistant filler 9 made of mica.

The mica material is a group of aluminosilicate hydrated minerals mainly composed of alkali and alkaline earth metals, iron, magnesium, manganese, vanadium and the like, and is a monoclinic system having a hardness of 2 to 3 and a specific gravity of 2.4 to 3.2.

The general characteristic of mica is that it has a complete cleavage in one direction, it is thinly peeled, the cleaved piece is wheeled, and is elastic and rugged. In addition, it has low electrical and thermal conductivity and is resistant to high voltage.

The mica material plays a role of maximizing the sealing effect of the gasket, and is disposed at a position excluding the circumference of the gas hole, the fastening hole, and the periphery.

When the hot exhaust gas passes through the gasket, the mica material expands due to the high temperature, thereby maximizing the sealing force between the exhaust pipes.

In the fifth to seventh embodiments, the ends of the lower plate, which is in contact with the upper plate on the upper plate, have the same height as the upper plate, and the ends of the upper plate, which is in contact with the lower plate under the lower plate, The upper end of the bolt may be formed with a step corresponding to the step difference and the upper plate between the bolt part and the outer circumferential part may form a plane without forming a step as in the sixth embodiment of FIG.

12 shows a sixth embodiment of the metallic gasket having the composite stepped portion of the present invention.

The upper plate 610 and the lower plate 620 of the embodiment have the same configuration as the upper plate 610 and the lower plate 620 of the fifth embodiment except that a step is formed in the upper plate 610 between the bolt and the outer circumferential portion And a metal plate is filled in place of the mica material with the heat-resistant filler.

The metal plates 801 and 802 as the heat-resistant fillers are located between the upper plate 610 and the lower plate 620 to form a full bead or a half bead, so that the upper plate 610 and the lower plate 620 are parallel So as to form a space portion.

Hereinafter, the metal plate as the heat-resistant filler will be described in the following various embodiments.

13 shows a seventh embodiment of the present invention. As shown in FIG. 13, an upper plate 710 is disposed at an upper portion parallel to a predetermined distance from a lower plate 720, And the lower end of the lower plate 720 is bent so as to be in contact with the lower surface of the lower plate 720.

The lower plate 720 is positioned below the upper plate 710 and the end of the lower plate 720 and the end of the upper plate 710 are formed parallel to each other on the bolt side.

The lower plate 720 is positioned below the upper plate 710 so that the end of the lower plate 720 is bent over the upper plate 710 to be in surface contact with the upper surface of the upper plate 710.

The upper metal plate 803 forms a concave full bead between the gas hole and the bolt, and the lower metal plate 804 is formed of the same material as the upper metal plate 803 Thereby forming a convex full bead at the position.

Therefore, the concave full bead and the convex full bead are positioned to face each other, so that even if beads are not formed between the bolt part and the outer circumferential part, they can be caulked to the upper and lower plates while maintaining a constant interval.

Figs. 14 to 16 show different forms of beads that the metal plate can have on the gas hole side, between the gas hole and the bolt portion, and on the outer peripheral portion side.

Fig. 14 (a) is characterized in that the upper metal plate and the lower metal plate are formed so as to face each other on the gas hole side, between the gas hole and the bolt portion, or on the outer peripheral side, with full beads.

That is, the upper metal plate 805 forms a convex full bead contacting the upper plate, and the lower metal plate 806 forms a concave full bead abutting the lower plate.

Fig. 14 (b) is characterized in that an upper metal plate 807 and a lower metal plate 808 are formed adjacent to each other in a full bead on either side of the gas hole, between the gas hole and the bolt portion, or on the outer peripheral portion side.

That is, the upper metal plate 807 forms a concave full bead in contact with the plane of the lower metal plate 808, and the lower metal plate 808 forms a convex full bead in contact with the plane of the upper metal plate 807.

Fig. 14 (c) is characterized in that the bottom metal plate 810 of the convex full bead is in contact with the flat metal plate 809 on either side of the gas hole, between the gas hole and the bolt portion, or on the outer peripheral side.

That is, the upper metal plate 809 has a planar shape in close contact with the upper plate, and the lower metal plate 810 forms a convex full bead contacting the plane of the upper metal plate 809.

Fig. 14 (d) is characterized in that the lower metal plate 811 of the convex full bead is in contact with the upper plate and the lower plate on either side of the gas hole, between the gas hole and the bolt portion, or on the outer peripheral portion side.

In other words, the lower metal plate 811 is formed such that the flat surface of the lower metal plate 811 faces the lower plate, and the convex full beads abut against the upper plate.

Fig. 15 is a view showing that the upper metal plate and the lower metal plate are formed so as to face each other with a double half bead on either side of the gas hole, between the gas hole and the bolt portion, or on the outer peripheral portion side.

15 (a) is characterized in that the upper metal plate and the lower metal plate are formed so as to face each other with a double half bead on either side of the gas hole, between the gas hole and the bolt portion, or on the outer peripheral portion side.

That is, the upper metal plate 813 forms an upward sloping surface and an upper flat surface portion so as to abut the upper plate, and the lower metal plate 814 forms a downward sloping surface and a lower flat surface so as to abut the lower plate.

15B is characterized in that the upper metal plate 815 of the double half bead is in contact with the lower metal plate 816 on the gas hole side, between the gas hole and the bolt portion, or on the outer peripheral portion side.

That is, the upper metal plate 815 has an upward sloping surface and an upper flat portion that abuts the upper plate, and the lower metal plate 816 forms a planar shape that is in contact with the lower flat portion of the upper metal plate 815.

Fig. 15 (c) is characterized in that the bottom metal plate 812 of the double half bead is in contact with the upper plate and the lower plate on either side of the gas hole, between the gas hole and the bolt portion, or on the outer peripheral portion side.

That is, the lower metal plate 812 is formed such that the lower plane thereof faces the lower plate, and the upper plane portion by the upward inclined plane abuts against the upper plate.

Fig. 16 is characterized in that the upper metal plate and the lower metal plate are formed so as to face each other on the gas hole side, between the gas hole and the bolt portion, or on the outer peripheral side, with a double half bead.

16 (a) is characterized in that the upper metal plate and the lower metal plate are formed so as to face each other with half beads on either side of the gas hole, between the gas hole and the bolt portion, or on the outer peripheral portion side.

That is, the upper metal plate 817 forms an upward sloping surface and an upper flat surface portion abutting the upper plate, and the lower metal plate 818 forms a lower flat surface portion abutting the downward sloping surface and the lower plate.

Fig. 16 (b) is characterized in that the upper metal plate 819 of the half bead is brought into contact with the flat bottom metal plate 820 on the gas hole side, between the gas hole and the bolt portion, or on the outer peripheral side.

That is, the upper metal plate 819 forms an upward sloping surface and an upper flat surface portion closely contacting the upper plate, and the lower metal plate 820 forms a plane contacting the lower flat surface of the upper metal plate 819.

Fig. 16 (c) is characterized in that the lower metal plate 821 of the half bead is in contact with the upper plate and the lower plate on either side of the gas hole, between the gas hole and the bolt portion, or on the outer peripheral portion side.

That is, the lower metal plate 821 is formed with a lower flat portion to which the lower plate is to be fitted, and an upper flat portion is formed with the upper inclined surface and the upper plate.

110, 210, 310, 410, 510, 610, 710: top plate
120, 220, 320, 420, 520, 620, 720:
801, 803: Upper metal plate 802, 804: Lower metal plate

Claims (20)

A gasket for forming a closed case by bending an end of an upper plate and a lower plate,
Wherein at least one of the ends of the bolt portion and the outer peripheral portion is bent corresponding to the bent thickness of the gas hole side so that the step with the gas hole side is adjusted when assembled with the mating member.
The method according to claim 1,
Wherein the end of the lower plate is bent toward the outer side of the upper plate with the end of the lower plate wrapping around the end of the upper plate and the end of the lower plate is bent around the end of the upper plate with respect to the outer periphery. Metal gasket with multiple steps.
The method according to claim 1,
Wherein the upper end of the upper plate is bent toward the gas hole side and the lower end of the lower plate is bent toward the outer periphery side while the end of the lower plate surrounds the end of the upper plate. Metal gasket with multiple steps.
The method according to claim 1,
Wherein the end of the upper plate and the end of the upper plate are in contact with each other while the end of the lower plate is bent toward the outer side of the upper plate and the end of the upper plate is interposed between the ends of the lower plate and the outer plate. Metal gasket with step difference.
The method according to claim 1,
Wherein an upper end of the upper plate is bent toward the gas hole side and a lower end of the lower plate is bent toward the outer side of the lower plate so that the lower end of the lower plate is bent toward the gas hole side, .
The method according to claim 1,
Wherein the thickness of the upper plate has a dimension greater than the thickness of the lower plate.
6. The method according to any one of claims 2 to 5,
Wherein a space portion having a predetermined space is formed between the upper plate and the lower plate, and the space portion is filled with a heat-resistant filler.
8. The method of claim 7,
Wherein the heat-resistant filler is composed of mica or at least one metal plate.
9. The method of claim 8,
Wherein the metal plate forms one of a full bead, a half bead, and a double half bead on the gas hole side, between the gas hole and the bolt portion, and on the outer peripheral portion side.
10. The method of claim 9,
The metal plate may include:
An upper metal plate forming a concave full bead;
And a lower metal plate for forming a convex full bead facing the upper metal plate so as to face the upper metal plate.
10. The method of claim 9,
The metal plate may include:
An upper metal plate forming a convex full bead;
And a lower metal plate for forming a concave full bead so as to abut against the upper metal plate.
10. The method of claim 9,
The metal plate may include:
An upper metal plate forming a recessed full bead so as to abut the plane of the lower metal plate;
And a lower metal plate adjacent to the recessed full bead of the upper metal plate to form a convex full bead to abut the plane of the upper metal plate.
10. The method of claim 9,
The metal plate may include:
A planar upper metal plate;
And a lower metal plate for forming a convex full bead so as to abut against the upper metal plate.
10. The method of claim 9,
Wherein the metal plate comprises a metal plate forming a convex full bead to abut the upper plate.
10. The method of claim 9,
The metal plate may include:
An upper metal plate which forms an upward sloping surface on both sides of the upper plane portion and an upper plane portion which abuts on the upper plate;
And a lower metal plate that forms a downward sloping surface on both sides of the lower flat portion and a lower flat portion that abuts against the lower plate.
10. The method of claim 9,
The metal plate may include:
An upper metal plate which forms an upward sloping surface on both sides of the upper plane portion and an upper plane portion which abuts on the upper plate;
Wherein the metal gasket comprises a flat lower metal plate.
10. The method of claim 9,
Wherein the metal plate is composed of an upper plane portion abutting the upper plate and a metal plate forming an upward inclined plane on both sides of the upper plane portion.
10. The method of claim 9,
The metal plate may include:
An upper metal plate for forming an upper inclined surface to one side of the upper plane portion;
And a lower metal plate which forms a downward sloped surface on one side of the lower flat portion and a lower flat portion which abuts on the lower plate.
10. The method of claim 9,
The metal plate may include:
An upper metal plate for forming an upper inclined surface to one side of the upper plane portion;
Wherein the metal gasket comprises a flat lower metal plate.
10. The method of claim 9,
Wherein the metal plate is composed of an upper planar portion abutting the upper plate and a metal plate forming an upward inclined surface to one side of the upper planar portion.
KR1020120125542A 2012-11-07 2012-11-07 Metal gasket having compound offset structure KR20140058990A (en)

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Application Number Priority Date Filing Date Title
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