WO2011102148A1 - シリンダーヘッド用メタルガスケットの製造方法及びシリンダーヘッド用メタルガスケット - Google Patents
シリンダーヘッド用メタルガスケットの製造方法及びシリンダーヘッド用メタルガスケット Download PDFInfo
- Publication number
- WO2011102148A1 WO2011102148A1 PCT/JP2011/000962 JP2011000962W WO2011102148A1 WO 2011102148 A1 WO2011102148 A1 WO 2011102148A1 JP 2011000962 W JP2011000962 W JP 2011000962W WO 2011102148 A1 WO2011102148 A1 WO 2011102148A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hole
- substrate
- cylinder head
- cylinder
- cooling water
- Prior art date
Links
Images
Classifications
-
- 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
- F16J15/0825—Flat gaskets laminated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
- B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
- B21D39/032—Joining superposed plates by locally deforming without slitting or piercing by fitting a projecting part integral with one plate in a hole of the other plate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
-
- 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
- F16J15/0825—Flat gaskets laminated
- F16J15/0831—Flat gaskets laminated with mounting aids
-
- 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
- F16J2015/085—Flat gaskets without fold over
-
- 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
- F16J2015/0862—Flat gaskets with a bore ring
-
- 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
- F16J2015/0868—Aspects not related to the edges of the gasket
Definitions
- the present invention relates to a method of manufacturing a cylinder head metal gasket that is inserted between a cylinder block and a cylinder head of an internal combustion engine and seals between their joint surfaces, and a cylinder head metal gasket.
- a metal gasket is interposed on the joint surface between the cylinder block and the cylinder head, and the metal gasket is tightened with a head bolt to seal the combustion gas, cooling water, and lubricating oil.
- the seal of the cylinder hole is important. If the seal of this part is insufficient, the combustion gas will flow between adjacent cylinders, the engine output will decrease, or the leaked combustion gas will enter the cylinder hole. As a result of flowing into the cooling water holes that surround the circumference, problems such as overheating occur, and in the worst case, even the engine seizure phenomenon occurs.
- Patent Document 1 and Patent Document 2 disclose metal gaskets in which an annular bead is provided so as to surround a cylinder hole in an elastic metal plate forming a metal gasket.
- the metal gasket for a cylinder head disclosed in these documents is made of a metal plate, a cylinder hole formed corresponding to each cylinder bore of a cylinder block of an internal combustion engine, and an annular bead formed around each cylinder hole.
- each annular bead corresponding to the cooling water jacket of the cylinder block and the cooling water hole of the cylinder head, and disposed opposite to the annular bead of the substrate
- An annular step adjustment plate is formed, and these substrates and the step adjustment plate are integrated by putting a claw portion formed on the step adjustment plate into a hooking hole formed on the substrate and folding it back to one side.
- a difference in plate thickness is provided between the annular bead and the outer peripheral bead so that the surface pressure balance is appropriate.
- the claw portion 3h is folded only on one side, so that the substrate 2 and the step adjustment plate 3 are firmly connected. There is a problem that can not be fixed. Further, as shown in FIG. 19, when the level difference adjusting plate 3 is placed in stock or stacked in the manufacturing process of the metal gasket, the claw portion 3h bent up at a right angle is bent obliquely, There is a problem that rework is required at the time of assembling and man-hours increase, or defective products must be discarded.
- the lower hole 3 c is opened in the protruding piece 3 b protruding from the outer peripheral edge of the step adjustment plate 3.
- the peripheral portion of the lower hole 3c is drawn with a die having a cylindrical punch to form a cylindrical portion 3d having a circular cross section, and the cylindrical portion 3d is inserted into the engaging hole 2h and folded outward.
- the step adjustment plate 3 can be firmly fixed to the substrate, and as shown in FIG. 21, the step adjustment plate 3 may be placed in stock or stacked in the metal gasket manufacturing process, for example. Since the cylindrical portion 3d is formed, it does not bend at an angle, and it has been found that there is no need for rework when assembling to the substrate 2 or disposal as a defective product.
- JP 2002-286141 A Japanese Patent Laid-Open No. 10-281289
- the deep drawing material for example, SUS304, SUS430
- the deep drawing material has a low tensile strength and a high elongation rate.
- the resistance against expansion and contraction of the cylinder block was weakened, and the step adjustment plate 3 was deformed in the exhaust direction, the suction direction, etc., as shown in FIGS.
- the thickness of the metal foil of the step adjustment plate 3 that can be generally used is the sealing performance of the gasket.
- 0.05mm to 0.15mm is reasonable, and the fact that only this range of plate thickness must be taken is also a large factor as a factor of deformation Accounted for.
- the above-described countermeasure against deformation is indispensable, and from this, a countermeasure against deformation of the step adjustment plate 3 is necessary.
- a cylindrical cylindrical portion 3d is raised and processed with a mold having a cylindrical punch in a circular prepared hole 3c opened in the protruding piece 3b of the step adjusting plate 3, and the cylindrical portion 3d is formed on the substrate.
- the portion that penetrated was folded outward (bending) and crushed, as shown in FIG. If the gap between the cracks is small, the hooking force of the folded portion to the substrate 2 is reduced, while the folded portion may be missing from the step adjustment plate 3. And the substrate 2 may remain in the mold or may damage the bead portion of the substrate 2 to cause a sealing failure. Further, as shown in FIG.
- a polygonal lower hole 3c is previously formed in the projecting piece 3b of the step adjusting plate 3, and a cross section is formed by inserting a mold having a cylindrical punch into the lower hole 3c. Even if the polygonal cylindrical portion 3d is formed, if an elastic material is used as the step adjustment plate 3, cracks are generated in the intermediate portion of the cylindrical portion 3d as shown in FIG. Or a part of the cylindrical portion 3d is lost.
- the present invention provides a method for producing a metal gasket for a cylinder head capable of providing a firm engagement state without any problems due to the occurrence of cracks, lack of cracks, etc., in engagement between the substrate and the step adjustment plate, and Enhancing force between the substrate and the step adjustment plate is improved, and the surface pressure balance is made appropriate by providing a difference in plate thickness between the annular bead and the outer peripheral bead using a minute step using metal foil.
- the object is to provide a metal gasket for a cylinder head.
- An object of the present invention is to advantageously solve the above-mentioned problems, and a manufacturing method of a cylinder head metal gasket according to the present invention comprises an elastic metal plate and a cylinder block for assembling a cylinder head of an internal combustion engine.
- the annular bead formed around each cylinder hole, the cooling water hole of the cylinder head, and the cooling water jacket or cooling water hole of the cylinder block And at least one substrate having a cooling water hole formed in an outer peripheral portion of each annular bead and an outer peripheral bead formed at a position surrounding the annular bead and the cooling water hole.
- a plurality of annular portions each of which is made of a metal plate and overlaid on a peripheral portion of each cylinder hole of the substrate, and each annular portion
- a step adjusting plate having a plurality of projecting pieces integrally formed on an outer peripheral edge, and a method of manufacturing a metal gasket for a cylinder head, wherein the projecting pieces of the step adjusting plate are engaged with the substrate.
- the peripheral part of the pilot hole is raised in a cylindrical shape and at the same time the peripheral part is Dividing and cutting into a plurality of portions to form a cylindrical portion composed of a plurality of protruding portions, forming a hooking hole at a position of the substrate corresponding to the cylindrical portion of the step adjustment plate, and the hooking hole of the substrate
- the protruding portion of the cylindrical portion is folded outward and crushed, whereby the protruding piece is engaged with the substrate.
- the “polygonal pyramid shape” includes a truncated polygonal pyramid shape in which the tip of the punch is formed flat or round.
- the mold having the polygonal pyramid-shaped punch is used when the peripheral portion of the pilot hole formed in the protrusion of the step adjustment plate is raised in a cylindrical shape.
- the side wall of the cylindrical part raised up into a cylindrical shape is divided into a plurality of protrusions of substantially equal size by the corners of the punch (the corners connecting adjacent conical surfaces and functioning as cutting edges) Disconnected. Therefore, since the plurality of formed protrusions are folded back and crushed, the protrusions are crushed in a state of being evenly opened in a petal shape, resulting in a firm engagement state between the substrate and the step adjustment plate.
- the step adjustment plate can be prevented from coming off the substrate.
- the present invention is advantageous when an elastic material (for example, a stainless steel strip for springs) is used as the material of the step adjustment plate.
- a mold having a pentagonal pyramid-shaped punch is used as the mold, and five protruding portions are formed on each cylindrical portion. preferable. This is because the protruding portions of the cylindrical portion that are crushed in a plurality of petal-like open states are surely large enough to bring about a firm engagement state with the substrate.
- the die having a punch angle of 20 to 40 degrees as the die.
- the “cone angle of the punch” referred to here is an angle formed by a corner portion, which functions as a cutting edge, located at the boundary between the conical surface of the polygonal pyramid-shaped punch and the axis of the punch. Means. If the cone angle of the punch exceeds 40 degrees, there are places where the cylindrical portion cannot be cut into a plurality of portions simultaneously with the formation of the cylindrical portion, and the number and angle of the protruding portions (the number of protruding portions relative to the extending surface of the step adjustment plate (Inclination angle) may be uneven. On the other hand, if the cone angle of the punch is less than 20 degrees, there is no problem in the production of the cylindrical part, but the press stroke becomes long and the die tip becomes thin. Therefore, the anxiety of the mold tip breaking during processing increases.
- the shape of the prepared hole formed in the step adjusting plate is a circle.
- the pilot hole has a polygonal shape according to the shape of the punch, but if the pilot hole is made polygonal, the punch is also a polygonal pyramid shape, so workability is required to ensure both position accuracy and angular position accuracy. Gets worse.
- the lower hole is circular, it is not necessary to align the angle between the lower hole and the punch and to align the angle, so that good quality can be ensured while improving workability.
- the shape of the engaging hole formed in the substrate is circular.
- the hooking hole has a polygonal shape in accordance with the cross-sectional shape of the cylindrical part, but if the hooking hole is a polygon, the shape of the cylindrical part inserted into the hooking hole is also a polygon. Workability deteriorates in ensuring accuracy and angular position accuracy.
- the engagement hole of the substrate is made into a polygon, it is necessary to make the folding mold used to fold and collapse the protruding portion of the cylindrical portion outward, and the positional accuracy and angular position between the folded mold and the protruding portion are required. Workability deteriorates in ensuring accuracy. If the engagement hole is circular, alignment between the engagement hole and the cylindrical part, as well as between the folding mold and the projection part, and angular alignment are unnecessary, so that good quality is ensured while improving workability. Can do.
- the present invention also includes a cylinder hole formed of an elastic metal plate and corresponding to each cylinder bore of a cylinder block to which a cylinder head of an internal combustion engine is assembled, and an annular bead formed around each cylinder hole.
- a metal gasket for a cylinder head comprising: a step adjusting plate having a plurality of protrusions integrally formed with By forming a pilot hole in each protruding piece of the step adjusting plate and inserting a die having a polygonal pyramid-shaped punch into the pilot hole, the peripheral part of the pilot hole is raised in a cylindrical shape and at the same time the peripheral part is Dividing and cutting into a plurality of portions to form a cylindrical portion composed of a plurality of protruding portions, forming a hooking hole at a position of the substrate corresponding to the cylindrical portion of the step adjustment plate, and the hooking hole of the substrate After the cylindrical portion of the step adjustment plate is passed through, the protruding portion of the cylindrical portion is folded outward and crushed,
- the outer partial end surface of the annular portion of the step adjustment plate on the cooling water hole side may be located outside the outer edge forming the bead shape of the annular bead.
- the outer portion end face may be located inside the cylinder head cooling water hole, the cooling water jacket or cooling water hole portion of the cylinder block, and the inner edge of the outer peripheral bead formed at a position surrounding the cooling water hole. preferable.
- a cylinder head metal gasket manufacturing method capable of providing a firm engagement state between a substrate and a step adjustment plate, and a cylinder head metal with improved engagement force between the substrate and the step adjustment plate.
- a gasket can be provided.
- FIG. 1 It is a top view which shows the whole metal gasket for cylinder heads of one Embodiment according to this invention.
- (A) is a cross-sectional view of the cylinder head metal gasket of the above embodiment, taken along line AA in FIG. 1, and
- (b) is a cross-sectional view taken along line BB in FIG.
- FIG. 1 It is a top view which shows the protrusion of the level
- (A) is a side view showing a tubular portion formed by directly piercing a pentagonal pyramid-shaped punch without a pilot hole in the projecting piece, and (b) is a tubular portion of FIG.
- (A) is a table
- (b) is the graph which showed the relationship between the cone angle of a pentagonal pyramid punch, and a cone part length.
- Sectional drawing which shows the level
- (A), (b) is a figure explaining the state which the level
- (A) is a top view which shows the protrusion of the level
- (b) is the protrusion of the level
- (c) is a pentagonal cross section in which a mold having a cylindrical punch is inserted into a pentagonal pilot hole formed on the protrusion of the step adjustment plate. It is a top view shown in the state where the cylindrical part of this was formed and the cylindrical part was folded outside and crushed. It is a top view which shows the metal gasket for cylinder heads of one Embodiment according to this invention in the state by which the level
- the cylinder head metal gasket (hereinafter, simply referred to as “metal gasket”) 1 of this embodiment is a laminated type in which three metal plates including a step adjustment plate are laminated, as shown in FIG.
- Two substrates 2 each made of a stainless steel plate as an elastic metal plate are provided. As shown in FIGS. 1 and 3, each of these substrates 2 is formed in correspondence with each cylinder bore of a cylinder block in which a cylinder head is assembled in an engine as an internal combustion engine in which the metal gasket 1 is incorporated.
- the figure shows three cylinder holes 2a, an annular bead 2b having a chevron cross section formed around each cylinder hole 2a, and a cooling water jacket (in the case of an open deck type) or cooling water hole (closed) of the cylinder block.
- a cooling water jacket in the case of an open deck type
- a cooling water hole closed
- an outer peripheral bead 2d having a one-sided cross-sectional shape formed at a surrounding position.
- Each of the two substrates 2 further includes a plurality of lubricating oil holes 2e and a plurality of head bolts (eight in the figure) through which a cylinder head is fastened and fixed to the cylinder block.
- Bolt holes 2f and eyelet holes 2g, and the annular beads 2b of the two substrates 2 are aligned with each other in the thickness direction of the gasket 1 and are opposite to each other.
- the outer peripheral beads 2d of the two substrates 2 are also aligned with each other in the thickness direction of the gasket 1 and protrude outward so as to be opposite to each other.
- the lower substrate 2 facing the deck surface of the cylinder block has a cooling water jacket (in the case of an open deck type) or a cooling water hole (in the case of a closed deck type) of the cylinder block. ), And in the illustrated example, four to five pieces are appropriately spaced apart from each other in the circumferential direction on the outer peripheral portion of the annular bead 2b around each cylinder hole 2a corresponding to the position of the cooling water hole of the cylinder head. It has the engaging hole 2h formed.
- the metal gasket 1 of this embodiment is also a metal plate having a thickness (for example, a thickness of 0.01 mm to 0.15 mm) between the two substrates 2 that is thinner than the substrate 2, for example.
- a step adjustment plate 3 made of a stainless steel plate (preferably, an elastic material such as a stainless steel strip for springs).
- the level difference adjusting plate 3 includes three annular portions 3a that are superposed on the peripheral portion of each cylinder hole 2a of the substrate 2 and a protruding piece 3b that is integrally formed on the outer peripheral edge of the annular portion 3a. The three annular portions 3a are coupled to each other.
- the protruding piece 3b protrudes outward from the outer peripheral edge of the annular portion 3a, and extends at least to the position of the cooling water jacket or cooling water hole of the cylinder block.
- four to five projecting pieces 3b are provided in each annular portion 3a corresponding to four to five engaging holes 2h around each cylinder hole 2a of the lower substrate 2.
- each protruding piece 3b is firmly attached to the lower substrate 2 by five protruding portions 3d 1 (caulking portions) of a cylindrical portion 3d, which will be described later, crushed in a petal-like open state. It is related.
- FIG. 2B The relationship in the width direction between the step adjustment plate 3 and the annular bead 2b is shown in FIG. 2B.
- the outer partial end surface of the annular portion 3a of the step adjustment plate 3 on the cooling water hole side is shown in FIG. It arrange
- FIG. 6 is a cross-sectional view of the metal gasket 1 according to another embodiment of the present invention at the same position as in FIG. 2A.
- the protruding directions of the annular bead 2b and the outer peripheral bead 2d are as follows. It differs from the previous embodiment only in that it is different from the previous embodiment and faces each other. In other respects, it has the same configuration as the previous embodiment.
- a strong engagement state between the substrate 2 and the step adjustment plate 3 is brought about by the plurality of protruding portions 3d 1 which are folded back and crushed around the engagement hole 2h. Therefore, even if fretting (relative movement parallel to the deck surface) occurs between the deck surfaces due to repeated heating and cooling of the cylinder head and the cylinder block, the step adjustment plate 3 is prevented from being detached from the substrate 2. Can do.
- the step adjustment plate 3 is formed by the step of the step adjustment plate 3 positioned between the two substrates 2 as shown in FIG. Since the entire bead spanning from the inner edge L1 to the outer edge L2 of the annular bead 2b is placed, the step between the annular bead 2b and the outer peripheral bead 2d of the substrate 2 and the surface pressure between the annular bead 2b and the outer peripheral bead 2d are increased, and the annular bead is increased. The total compression of 2b can be promoted. In particular, even when a thin metal foil such as 0.05 mm is used, the surface pressure balance can be made appropriate by setting a slight step.
- the engaging hole 2h for penetrating the cylindrical portion 3d is provided in the outer peripheral portion of the annular bead 2b of the substrate 2 or the cooling water hole of the cylinder head or the cylinder. Since it is provided corresponding to the cooling water jacket or cooling water hole of the block, the cylindrical part 3d is folded outward and cooled so that it is not pinched between the deck surfaces of the cylinder head and the cylinder block. Since it can escape to a water hole or a cooling water jacket, the folded and crushed portion can be prevented from preventing an increase in the surface pressure of the annular bead 2b.
- the cylindrical portion 3d crushed in a state of being opened in a plurality of petal shapes.
- the protruding portion 3d 1 is ensured to be large enough to provide a firm engagement with the substrate 2.
- the number of the engagement holes 2h formed on the substrate 2 and engaged with the protruding pieces 3b is set to 4 to 5 for each cylinder bore. Therefore, the engagement force of the step adjustment plate 3 to the substrate 2 is sufficiently increased, and even if fretting occurs between the deck surfaces of the cylinder head and the cylinder block, the step adjustment plate 3 is reliably prevented from coming off the substrate 2. can do.
- a circular pilot hole 3c is formed at the tip of each protruding piece 3b of the step adjusting plate 3 by punching using a press die, for example.
- the reason why the lower hole 3c is provided in the projecting piece 3b is that there is no lower hole 3c, and a pentagonal pyramid-shaped punch is directly pierced into the projecting piece 3b and processed into a cylindrical shape, and the cylindrical portion 3d is formed in the engagement hole 2h of the substrate 2 This is because if the insert is folded and flattened (crushed), the tip is bent, and the substrate 2 and the step adjustment plate 3 may not be integrated completely. Because, when the cylindrical portion 3d is raised, the tip of the cylindrical portion 3d is bent so as to be turned outward (see FIG. 8A). This is because there is a problem of being bent into a bent shape (see FIG. 8B).
- a peripheral portion of the circular pilot hole 3c is drawn by inserting a die 4 having a polygonal pyramid-shaped (in this case, pentagonal pyramid) punch 4a into the pilot holes 3c formed in each projecting piece 3b.
- the peripheral portion is raised into a cylindrical shape, and at the same time, the peripheral portion is divided and cut into a plurality of pieces by a cutting edge (corner portion) 4b of the punch 4a.
- a cylindrical portion 3d comprising a protruding portion 3d 1.
- the height of the cylindrical portion 3d can sufficiently correspond to, for example, 1 mm.
- the lower part of the mold 4 below the punch 4a has a cylindrical shape.
- the step adjustment plate 3 having the cylindrical portion 3d raised on each protruding piece 3b in this manner is overlaid on the lower substrate 2 shown in FIG. 3, and the three rings of the step adjustment plate 3 are attached to the substrate 2.
- the cylindrical portion 3d of each projecting piece 3b is penetrated into each engaging hole 2h of the substrate 2, as shown in FIG.
- the lower substrate 2 is preferably formed with a circular engagement hole 2h in advance at an arbitrary timing.
- the protruding portion 3d 1 of the cylindrical portion 3d of each protruding piece 3b passing through the engaging hole 2h of the substrate 2, for example, the die 5 having a conical punch at the tip portion is provided. Use to fold outward.
- the cylindrical portion 3d is divided and cut into a plurality of (in this case, five) projecting portions 3d 1 having approximately the same size, so that when the cylindrical portion 3d is folded outward, a plurality of petals Open evenly.
- the protruding portion 3d 1 of this petals in the open cylindrical portion 3d further crushed flat by using e.g. tip die with a flat punch (not shown).
- the cylindrical portion 3 d is crushed in a state where it is opened in a plurality of substantially equal petal shapes, and each protruding portion 3 d 1 becomes sufficiently large and engages with the substrate 2.
- the step adjustment plate 3 engaged with the lower substrate 2 via the cylindrical portion 3d of each protruding piece 3b is overlapped with the upper substrate 2 as shown in FIG.
- the three cylinder holes 2a of the upper and lower substrates 2 are vertically aligned, and further normal grommets (not shown) inserted through the eyelet holes 2g aligned with each other of the upper and lower substrates 2 are crimped.
- the grommet hole 2g is disengaged outwardly from the position between the cylinder block and the cylinder head of the engine. Therefore, the grommet is sandwiched between the deck surfaces of the cylinder block and the cylinder head of the engine.
- the surface pressure of the beads 2b and 2d is not reduced.
- the mold 4 having the polygonal pyramid-shaped punch 4a is used when the peripheral portion of the lower hole 3c formed in the projecting piece 3b of the step adjusting plate 3 is raised in a cylindrical shape. Then, the side wall of the cylindrical portion 3d raised in a cylindrical shape is divided and cut into a plurality of projection portions 3d 1 having a substantially equal size by a cutting edge 4d of the punch 4a (a corner portion connecting adjacent conical surfaces). The Therefore, the plurality of formed protruding portions 3d 1 are folded outward and crushed, so that the protruding portions 3d 1 are crushed evenly in a petal shape, and the substrate 2 and the step adjustment plate 3 are firmly engaged.
- this manufacturing method is advantageous when an elastic material (for example, a stainless steel strip for springs) is used as the material of the step adjustment plate 3.
- the cone angle ⁇ of the punch 4a is in the range of 20 to 40 degrees as the mold 4.
- the “cone angle ⁇ of the punch” is an angle formed by a corner portion, which functions as a cutting edge, located at the boundary between the conical surface of the polygonal pyramid-shaped punch with respect to the punch axis S. Means that.
- the cone angle ⁇ of the punch exceeds 40 degrees, at the same time when the cylindrical portion 3d is formed, there are places where the cylindrical portion 3d cannot be cut into a plurality of parts, and the number and angle of the protruding portions 3d 1 (the extension of the step adjustment plate 3).
- the shape of the lower hole 3c formed in the step adjustment plate 3 is circular. There is no problem even if the lower hole 3c has a polygonal shape in accordance with the shape of the punch. However, if the lower hole 3c is a polygonal shape, as shown in FIG. 14, the punch is also a polygonal pyramid shape. Workability deteriorates in securing the position accuracy. If the lower hole 3c is circular, it is not necessary to align the angular position of the lower hole 3c and the punch, and therefore, it is possible to ensure good quality while improving workability.
- the engagement hole 2h formed in the substrate 2 has a circular shape. There is no problem even if the engaging hole 2h has a polygonal shape in accordance with the cross-sectional shape of the cylindrical portion 3d, but when the engaging hole 2h is a polygon, the shape of the cylindrical portion 3d inserted into the engaging hole 2h is also a polygon. Therefore, workability deteriorates in securing both the positional accuracy and the angular positional accuracy.
- the engaging hole 2h of the substrate 2 in the polygon, to be a polygon is generated a folded used to crush wrap the projecting portions 3d 1 of the cylindrical portion 3d to the outside, the protruding portion 3d 1 and folded
- the workability deteriorates in securing the positional accuracy and the angular positional accuracy. If the engaging hole 2h is circular, positioning between the engaging hole 2h and the cylindrical portion 3d and between the folding mold and the protruding portion 3d 1 and angular alignment are unnecessary. Quality can be ensured.
- the cylinder head metal gasket manufacturing method of the first embodiment according to the present invention (hereinafter, referred to as “manufacturing method of Example 1”), this A cylinder head metal gasket manufacturing method of the second embodiment according to the present invention (hereinafter referred to as “manufacturing method of Embodiment 2”) and a cylinder head metal gasket manufacturing method of the third embodiment according to the present invention ( Hereinafter, it is referred to as “manufacturing method of Example 3”), and a portion (test piece) in which the substrate 2 and the step adjustment plate 3 are integrated as shown in FIG. And the integrated strength of the step adjustment plate 3 were confirmed.
- a step of forming a pentagonal pilot hole 3c in each projecting piece 3b of the step adjustment plate 3 and a pentagonal pyramid punch 4a are formed.
- a step of forming a circular pilot hole 3c in each protruding piece 3b of the step adjustment plate 3 and a gold having a pentagonal pyramid-shaped punch 4a when the step adjustment plate 3 is engaged with the substrate 2, a step of forming a circular pilot hole 3c in each protruding piece 3b of the step adjustment plate 3 and a gold having a pentagonal pyramid-shaped punch 4a.
- the substrate 2, pentagonal engages the position corresponding to the cylindrical portion 3d of the height difference adjusting plate 3 forming a hole 2h, after the engagement hole 2h of the substrate 2 is passed through the cylindrical portion 3d of the step adjustment plate 3, the protruding portion 3d 1 of the cylindrical portion 3d to the outside with a pentagonal folded And folding and flattening.
- a step of forming a circular pilot hole 3c in each protruding piece 3b of the step adjustment plate 3 and a gold having a pentagonal pyramid-shaped punch 4a when the step adjustment plate 3 is engaged with the substrate 2, a step of forming a circular pilot hole 3c in each protruding piece 3b of the step adjustment plate 3 and a gold having a pentagonal pyramid-shaped punch 4a.
- the hole position accuracy and the angle position accuracy are important, and it is not necessary to darely adopt the manufacturing method of Example 1 and the manufacturing method of Example 2 which are inferior in terms of workability. , That is, only by forming the cylindrical portion 3d from the periphery of the circular pilot hole 3c by the mold 4 having the pentagonal pyramid-shaped punch 4a, the hooking between the substrate 2 and the step adjustment plate 3 is performed. It can be seen that the metal gasket 1 with improved resultant force can be manufactured inexpensively and stably.
- the processing test of the cylindrical portion 3d was performed by varying the pyramid angle ⁇ (blade edge angle) of the pentagonal pyramid-shaped punch, which will be described.
- the five molds 4 in which the cone angles ⁇ of the punches 4a were 10 degrees, 20 degrees, 30 degrees, 40 degrees, and 60 degrees were used for the machining test.
- the test results are shown in FIG. As can be seen from the test results, if the cone angle of the punch 4a theta was used mold 4 of 60 degrees, also did not occur stable part number and angles of the divided cut protruding portion 3d 1 is not uniform It was.
- the angle of the cone angle ⁇ of the punch 4a is preferably in the range of about 20 to 40 degrees.
- the shape of the lower hole 3c of each projecting piece 3b may be a polygon such as a square or a hexagon.
- a hole 2h may be formed in the upper substrate 2, and the cylindrical portion 3d of the step adjustment plate 3 may be engaged therewith.
- the mold 4 for forming the cylindrical portion 3d having a polygonal cross section by being inserted into the pilot hole 3c of the projecting piece 3b has a shape in which the tip of the punch 4a is flattened or rounded as shown in FIG.
- a punch 4a having a polygonal pyramid shape may be used.
- a method of manufacturing a cylinder head metal gasket capable of providing a firm engagement state between the substrate and the level difference adjusting plate, and a metal of the elastic material having a thickness of 0.05 mm to 0.15 mm between the substrate and the plate thickness. It has become possible to provide a metal gasket for a cylinder head having an improved engagement force with a step adjustment plate made of foil.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
Abstract
Description
2 基板
3 段差調整板
3a 環状部
3b 突片
3c 下孔
3d 筒状部
3d1 突起部分
4 金型
4a ポンチ
Claims (7)
- 弾性金属板からなり、内燃機関のシリンダーヘッドを組み付けられるシリンダーブロックの各シリンダーボアに対応して形成されたシリンダー孔(2a)と、前記各シリンダー孔(2a)の周囲に形成された環状ビード(2b)と、前記シリンダーヘッドの冷却水孔及び、前記シリンダーブロックの冷却水ジャケットまたは冷却水孔に対応して前記各環状ビード(2b)の外側周辺部に形成された冷却水孔(2c)と、前記環状ビード(2b)および前記冷却水孔(2c)を囲繞する位置に形成された外周ビード(2d)と、を有する少なくとも1枚の基板(2)と、
金属板からなり、前記基板(2)の各シリンダー孔(2a)の周縁部分にそれぞれ重ねられる複数の環状部(3a)と、各環状部(3a)の外周縁に一体に形成された複数の突片(3b)とを有する段差調整板(3)と、を備え、前記段差調整板(3)の前記突片(3b)を前記基板(2)に掛合させてなるシリンダーヘッド用メタルガスケット(1)の製造方法であって、
前記段差調整板(3)の各突片(3b)に下孔(3c)を形成し、
多角錐形状のポンチ(4a)を持つ金型(4)を前記下孔(3c)に差し込むことにより、該下孔(3c)の周辺部を筒状に立ち上げると同時に該周辺部を複数に分割切断して、複数の突起部分(3d1)からなる筒状部(3d)を形成し、
前記基板(2)の、前記段差調整板(3)の前記筒状部(3d)に対応する位置に掛合孔(2h)を形成し、
前記基板(2)の前記掛合孔(2h)に前記段差調整板(3)の前記筒状部(3d)を貫通させた後、該筒状部(3d)の突起部分(3d1)を外側に折り返して潰すことで、前記突片(3b)を前記基板(2)に掛合させたことを特徴とする、シリンダーヘッド用メタルガスケットの製造方法。 - 前記金型(4)として五角錐形状のポンチ(4a)を持つ金型(4)を用い、各筒状部(3d)に前記突起部分(3d1)をそれぞれ五つ形成する、請求項1に記載のシリンダーヘッド用メタルガスケットの製造方法。
- 前記金型(4)として、前記ポンチ(4a)の錐角(θ)が20~40度の範囲内にある金型(4)を用いる、請求項1又は2に記載のシリンダーヘッド用メタルガスケットの製造方法。
- 前記段差調整板(3)に形成する前記下孔(3c)の形状を円形とする、請求項1~3の何れか一項に記載のシリンダーヘッド用メタルガスケットの製造方法。
- 前記基板(2)に形成する前記掛合孔(2h)の形状を円形とする、請求項1~4の何れか一項に記載のシリンダーヘッド用メタルガスケットの製造方法。
- 弾性金属板からなり、内燃機関のシリンダーヘッドを組み付けられるシリンダーブロックの各シリンダーボアに対応して形成されたシリンダー孔(2a)と、前記各シリンダー孔(2a)の周囲に形成された環状ビード(2b)と、前記シリンダーヘッドの冷却水孔及び、前記シリンダーブロックの冷却水ジャケットまたは冷却水孔に対応して前記各環状ビード(2b)の外側周辺部に形成された冷却水孔(2c)と、前記環状ビード(2b)および前記冷却水孔(2c)を囲繞する位置に形成された外周ビード(2d)とを有する少なくとも1枚の基板(2)と、
金属板からなり、前記基板(2)の各シリンダー孔(2a)の周縁部分にそれぞれ重ねられる複数の環状部(3a)と、各環状部(3a)の外周縁に一体に形成された複数の突片(3b)とを有する段差調整板(3)と、を備えるシリンダーヘッド用メタルガスケット(1)であって、
前記段差調整板(3)の各突片(3b)に下孔(3c)を形成し、多角錐形状のポンチ(4a)を持つ金型(4)を前記下孔(3c)に差し込むことにより、該下孔(3c)の周辺部を筒状に立ち上げると同時に該周辺部を複数に分割切断して、複数の突起部分(3d1)からなる筒状部(3d)を形成し、前記基板(2)の、前記段差調整板(3)の前記筒状部(3d)に対応する位置に掛合孔(2h)を形成し、前記基板(2)の前記掛合孔(2h)に前記段差調整板(3)の前記筒状部(3d)を貫通させた後、該筒状部(3d)の突起部分(3d1)を外側に折り返して潰すことで、前記突片(3b)を前記基板(2)に掛合させてなることを特徴とするシリンダーヘッド用メタルガスケット。 - 前記段差調整板(3)の環状部(3a)の冷却水孔側の外側部分端面は、環状ビード(2b)のビード形状を形成する外縁(L2)よりも外側に位置し、かつ前記外側部分端面は、シリンダーヘッド冷却水孔及び、シリンダーブロック冷却水ジャケットまたは冷却水孔部分、並びに前記冷却水孔を囲繞する位置に形成された外周ビードの内縁より内側に位置する、請求項6に記載のシリンダーヘッド用メタルガスケット。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201180010385.4A CN102770654B (zh) | 2010-02-22 | 2011-02-21 | 制造用于汽缸盖的金属垫的方法及用于汽缸盖的金属垫 |
EP11744439.8A EP2541031B1 (en) | 2010-02-22 | 2011-02-21 | Method for manufacturing metallic gasket for cylinder head, and metallic gasket for cylinder head |
US13/580,349 US8939452B2 (en) | 2010-02-22 | 2011-02-21 | Metal gaskets for cylinder heads, and methods for manufacturing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010036530A JP5465038B2 (ja) | 2010-02-22 | 2010-02-22 | シリンダーヘッド用メタルガスケットの製造方法及びシリンダーヘッド用メタルガスケット |
JP2010-036530 | 2010-02-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011102148A1 true WO2011102148A1 (ja) | 2011-08-25 |
Family
ID=44482753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/000962 WO2011102148A1 (ja) | 2010-02-22 | 2011-02-21 | シリンダーヘッド用メタルガスケットの製造方法及びシリンダーヘッド用メタルガスケット |
Country Status (5)
Country | Link |
---|---|
US (1) | US8939452B2 (ja) |
EP (1) | EP2541031B1 (ja) |
JP (1) | JP5465038B2 (ja) |
CN (1) | CN102770654B (ja) |
WO (1) | WO2011102148A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6002022B2 (ja) * | 2012-12-18 | 2016-10-05 | 日本リークレス工業株式会社 | 金属ガスケット |
US10371160B2 (en) * | 2014-12-19 | 2019-08-06 | Nok Corporation | Sealing structure for casing |
JP6501540B2 (ja) * | 2015-02-04 | 2019-04-17 | 本田技研工業株式会社 | メタルガスケット |
JP6178036B1 (ja) * | 2015-11-27 | 2017-08-09 | Nok株式会社 | 金属ガスケット |
JP6394824B1 (ja) * | 2018-01-05 | 2018-09-26 | 国産部品工業株式会社 | ガスケット構成板の製造方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0842696A (ja) * | 1994-08-01 | 1996-02-16 | Nichias Corp | 金属ガスケット |
JPH10281289A (ja) | 1997-04-11 | 1998-10-23 | Sanwa Packing Kogyo Kk | シリンダヘッドガスケット |
JP2002286141A (ja) | 2001-03-23 | 2002-10-03 | Nichias Corp | 金属ガスケット |
JP2007064449A (ja) * | 2005-09-01 | 2007-03-15 | Nippon Leakless Corp | シリンダーヘッド用積層型メタルガスケット |
JP2010203379A (ja) * | 2009-03-05 | 2010-09-16 | Nippon Leakless Corp | シリンダーヘッド用メタルガスケット |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS489962U (ja) * | 1971-06-16 | 1973-02-03 | ||
JPH0741967Y2 (ja) * | 1990-06-30 | 1995-09-27 | 日本ガスケット株式会社 | 金属ガスケット |
JPH0810871A (ja) * | 1994-06-24 | 1996-01-16 | Toyota Auto Body Co Ltd | バーリングかしめ部成形金型及び成形方法 |
JP3121255B2 (ja) * | 1995-12-21 | 2000-12-25 | 石川ガスケット株式会社 | スチールラミネートガスケット |
JP2006125312A (ja) | 2004-10-29 | 2006-05-18 | Nippon Leakless Corp | シリンダーヘッド用メタルガスケット |
WO2006046662A1 (ja) * | 2004-10-29 | 2006-05-04 | Nippon Leakless Industry Co., Ltd. | シリンダーヘッド用メタルガスケット |
JP4746904B2 (ja) | 2005-04-07 | 2011-08-10 | 株式会社リコー | 加工方法、ダイ及び金型構造 |
-
2010
- 2010-02-22 JP JP2010036530A patent/JP5465038B2/ja not_active Expired - Fee Related
-
2011
- 2011-02-21 WO PCT/JP2011/000962 patent/WO2011102148A1/ja active Application Filing
- 2011-02-21 EP EP11744439.8A patent/EP2541031B1/en not_active Not-in-force
- 2011-02-21 CN CN201180010385.4A patent/CN102770654B/zh not_active Expired - Fee Related
- 2011-02-21 US US13/580,349 patent/US8939452B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0842696A (ja) * | 1994-08-01 | 1996-02-16 | Nichias Corp | 金属ガスケット |
JPH10281289A (ja) | 1997-04-11 | 1998-10-23 | Sanwa Packing Kogyo Kk | シリンダヘッドガスケット |
JP2002286141A (ja) | 2001-03-23 | 2002-10-03 | Nichias Corp | 金属ガスケット |
JP2007064449A (ja) * | 2005-09-01 | 2007-03-15 | Nippon Leakless Corp | シリンダーヘッド用積層型メタルガスケット |
JP2010203379A (ja) * | 2009-03-05 | 2010-09-16 | Nippon Leakless Corp | シリンダーヘッド用メタルガスケット |
Non-Patent Citations (1)
Title |
---|
See also references of EP2541031A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP2541031A1 (en) | 2013-01-02 |
EP2541031B1 (en) | 2014-07-02 |
US20120319361A1 (en) | 2012-12-20 |
US8939452B2 (en) | 2015-01-27 |
CN102770654B (zh) | 2015-03-04 |
JP5465038B2 (ja) | 2014-04-09 |
JP2011169452A (ja) | 2011-09-01 |
EP2541031A4 (en) | 2013-08-28 |
CN102770654A (zh) | 2012-11-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5465038B2 (ja) | シリンダーヘッド用メタルガスケットの製造方法及びシリンダーヘッド用メタルガスケット | |
KR101118373B1 (ko) | 금속판의 결합부 | |
EP1811162A1 (en) | Metal gasket for cylinder head | |
KR100793909B1 (ko) | 금속 적층형 개스킷 | |
US7422218B2 (en) | Flat gasket and process for the production of a flat gasket | |
EP2843268B1 (en) | Metal gasket and manufacturing method therefor | |
JP2007147052A (ja) | ガスケット | |
JP4137146B2 (ja) | ガスケット | |
EP2464901B1 (en) | Bimetallic static gasket and method of construction thereof | |
JP5307585B2 (ja) | シリンダーヘッド用メタルガスケット | |
KR100827685B1 (ko) | 컬링에 의한 적층형 가스켓의 체결수단 | |
EP2850344B1 (en) | Gasket with a compression limiter | |
US10830356B2 (en) | Static gasket and method of construction thereof | |
JP3874995B2 (ja) | シリンダヘッドガスケット | |
JP6002022B2 (ja) | 金属ガスケット | |
EP2817538B1 (en) | Static gasket with wire compression limiter | |
JP4787343B2 (ja) | 金属製ガスケット及びその製造方法 | |
KR100915313B1 (ko) | 금속 개스킷 | |
JP2020070905A (ja) | 積層型ガスケット | |
JP2010203507A (ja) | 金属ガスケット | |
JPH07318294A (ja) | 熱交換器の補修方法および熱交換器補修プラグ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180010385.4 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11744439 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011744439 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1904/KOLNP/2012 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13580349 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |