Classifications

• • 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
  • B21D39/035—Joining superposed plates by slitting
• • 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
• • 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
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49826—Assembling or joining
  • Y10T29/49833—Punching, piercing or reaming part by surface of second part
  • Y10T29/49835—Punching, piercing or reaming part by surface of second part with shaping
  • Y10T29/49837—Punching, piercing or reaming part by surface of second part with shaping of first part
• • 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
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49826—Assembling or joining
  • Y10T29/49908—Joining by deforming
  • Y10T29/49915—Overedge assembling of seated part
• • 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
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/53—Means to assemble or disassemble
  • Y10T29/53709—Overedge assembling means

Definitions

• the present invention relates to a method for joining a laminated metal plate such as a metal gasket formed by laminating a plurality of substrates and sub-plates, and a press die used for the method.
• a metal gasket formed by laminating a plurality of metal plates has a tongue-like shape on the outer peripheral edge deviating from the joining surface of the cylinder block and the cylinder head.
• Form a connecting part 41 make a through hole in this connecting part 41, insert a metal fitting for this, crush it, and form a fitting 5 to connect it.
• Multiple metal plates are joined in the stacking direction by welding or staking.
• the joining method requires a lot of time for the joining work, and the welding method reduces the work time but requires equipment cost. Therefore, a method for facilitating the joining work is required.
• Japanese Patent Laid-Open Publication No. Hei 6-2811 discloses a method of performing bonding of a metal gasket by press working.
• a plurality of mutually independent cutting lines 30a are formed on the laminated metal plates, and at the same time, the metal plate portion between the cutting lines 30a is laminated.
• Protruding portions 30b are formed by projecting in the laminating direction with a step larger than the thickness, and a part 30c of the cutting line 30a is formed as a breaking line by stretching to form a burr at the cut end. are doing.
• the present invention has been made in view of such problems of the prior art, and it is possible to sufficiently prevent the metal plate from coming off in the laminating direction and to form the laminated metal plate without complicating the mold shape. It is an object of the present invention to provide a method capable of preventing displacement in a plate surface in all directions, and which can be performed by a single press molding, and a press die used in the method. You. Disclosure of the invention
• an invention corresponding to claim 1 is to form two mutually independent cutting lines in a laminated metal plate and to make a metal plate portion between the cutting lines larger than a thickness of the laminated plate.
• the method of joining the laminated metal plates by forming the protrusion by projecting in the stacking direction at the step the cut end of the metal plate is crushed and spread after forming the protrusion.
• the present invention provides a method for joining laminated metal plates, characterized in that:
• the invention corresponding to claim 2 is the method according to claim 1, wherein the protruding portion has a central portion that protrudes the highest from the surface of the metal plate on the side to be cut, and extends from the central portion toward the surface of the metal plate.
• a total of four slope forming portions forming the slope portion of each of the cutting lines, and those adjacent in the circumferential direction face two different directions in the stacking plate surface. It is characterized by being formed as described above.
• the displacement between the metal plates in all directions in the plane of the laminate is prevented by the two cutting lines.
• This makes it possible to increase the length of the cutting line with respect to the size of the protruding portion, so that displacement between the metal plates in the plane of the laminated plate is reliably prevented.
• the cutting line becomes longer, the central part of the protruding part can be enlarged, so the enlarged cut end of the metal plate is enlarged to ensure sufficient overlap with the cutting end of the protruding part. Therefore, it is possible to more reliably prevent the metal plate from coming off in the stacking direction.
• the invention corresponding to claim 3 is the method according to claim 2, wherein the slope forming portion is along a line radiating from the central portion.
• the rising width of the protruding portion can be widened while taking a long cutting line, the displacement between the metal plates in the plane of the laminated plate can be reliably maintained while maintaining the strength at the rising portion of the protruding portion. Can be prevented.
• the invention corresponding to claim 4 is to form two independent cutting lines in the laminated metal plate and project the metal plate portion between the cutting lines in the laminating direction with a step larger than the thickness of the laminated plate.
• the protruding portion includes a center portion protruding the highest from the surface of the metal plate on the side to be cut, and a pair of slope portions inclined from the center portion toward the metal plate surface. And a total of four slope forming portions forming the slope portions of the respective cutting lines are formed so that adjacent ones in the circumferential direction face two different directions in the plane of the laminated plate.
• the invention corresponding to claim 5 is the method according to claim 4, wherein the slope forming portion is along a line radiating from the central portion.
• the invention corresponding to claim 6 is to form two mutually independent cutting lines in the laminated metal plate and project the metal plate portion between the cutting lines in the laminating direction with a step larger than the thickness of the laminated plate.
• Forming the protruding portion by joining the laminated metal plates, wherein the protruding portion is cut from both cutting line sides or the center side in a cross section in a direction intersecting the two cutting lines of the protruding portion.
• the present invention provides a method for joining laminated metal plates, characterized in that the protruding portion is pressed and deformed so as to approach the side of the metal plate.
• the protruding portion when the metal plate is pulled out in the laminating direction, the protruding portion has its cutting line side end hooked to the cut-side end and its width (the two (The dimension between the cutting lines of the book) in the direction that widens the metal plate, and the deformation increases as the metal plate tries to come off in the stacking direction. Sufficient overlap with the cut end in the stacking direction in the stacking direction is obtained, and detachment of the metal plate in the stacking direction is reliably prevented.
• the invention corresponding to claim 7 is to form two independent cutting lines in the laminated metal plate and at the same time project the metal plate portion between the cutting lines in the laminating direction with a step larger than the thickness of the laminated plate.
• the engaging protrusion formed on the engaging surface with the male and female molds projects with a dimension larger than the lamination thickness of the metal plates.
• the cut line interval at the protruding surface portion of the male die is set to a predetermined dimension (the male and female die line) from the corresponding female cut line interval. (A dimension sufficient to make a tensile cut rather than a shear at the time of engagement)), and at least one of the female and male engagement surfaces is engaged when the two are engaged.
• a predetermined dimension the male and female die line
• the female and male engagement surfaces is engaged when the two are engaged.
• the laminated metal plate is added between the pressing protrusion and the opposing engaging surface (or the opposing pressing protrusions). Since the cut end of the laminated metal plate from which the central portion has been cut off is crushed and spreads into the gap, the overlapped portion between the cut end of the projection and the cut end of the metal plate is sufficiently obtained. Can be As a result, detachment in the stacking direction is reliably prevented.
• the invention corresponding to claim 8 is the press die according to claim 7, wherein the inclined surface is provided so as to incline by expanding a skirt from the protruding surface toward the engaging surface. It is a feature.
• the press molding is performed by a single press molding. Therefore, according to the method described in claims 1 to 3 and 6, the detachment of the metal plate in the laminating direction is reliably prevented.
• the method of claim 2 in addition to this, displacement between the metal plates in all directions in the plane of the laminated plate is reliably prevented by the two cutting lines.
• the method of the third aspect in addition to the effect of the second aspect, since the strength at the rising portion of the protruding portion is maintained, a reliable effect can be expected particularly when the lamination thickness is large.
• a bonding structure in which the metal plate in the laminating direction is difficult to come off can be easily formed by a single pressing operation. This can shorten the time You.
• detachment of the metal plate in the laminating direction is reliably prevented, and misalignment between the metal plates in all directions in the plane of the laminated plate is ensured by the two cutting lines.
• An ideal joint structure that is prevented and maintains the strength at the rising portion of the protrusion can be easily formed by one press molding.
• FIG. 1 is a plan view showing a male-type female mold engaging surface side of the embodiment.
• FIG. 2 is a sectional view taken along line AA of FIG.
• FIG. 3 is a sectional view taken along line BB of FIG.
• FIG. 4 is a plan view showing an engagement surface side of a female type and a male type in the embodiment.
• FIG. 5 is a cross-sectional view taken along the line C-C of FIG.
• FIG. 6 is a sectional view taken along line DD of FIG.
• FIG. 7 is a cross-sectional view showing the engagement state between the male mold and the female mold along the line BB in FIG.
• Fig. 8 is a cross-sectional view showing the engagement state between the male and female dies along the cross section taken along the line A-A in Fig.
• FIG. 9 is a plan view showing the coupling structure in the embodiment, in which (a) illustrates each configuration of the coupling structure, and (b) illustrates the function of the slope forming portion of the cutting line. belongs to.
• FIG. 10 is a sectional view taken along line EE of FIG.
• FIG. 11 is a sectional view taken along line FF of FIG.
• FIG. 12 is a plan view showing a coupling structure different from that of the above embodiment.
• FIG. 13 is a plan view showing a coupling structure different from that of the above embodiment.
• FIG. 14 is a plan view showing a coupling structure different from that of the above embodiment.
• FIG. 15 is a schematic cross-sectional view showing another embodiment of the method for joining laminated metal sheets according to claim 1.
• FIG. 16 is a schematic cross-sectional view showing one embodiment of the method for bonding a laminated metal plate according to claim 6.
• FIG. 17 is a cross-sectional view showing the cross-sectional shape between the cutting lines of the protrusion formed by the method shown in FIG. Figure 18
• FIG. 3 is a plan view showing an example in which the embodiment is applied to a metal gasket.
• FIG. 19 is a plan view showing a conventional example of a method of joining metal gaskets.
• FIG. 20 is a plan view showing another conventional example of a method of joining metal gaskets.
• FIG. 21 is a plan view showing another conventional example of a method of joining metal gaskets.
• FIG. 22 is a plan view showing another conventional example of a method of joining metal gaskets.
• FIGS. 1 to 3 show the male type
• Fig. 1 is a plan view showing the engaging surface side with the female type
• Fig. 2 is a cross-sectional view taken along line A-A
• Fig. 3 is a cross-sectional view taken along line B-B. It is.
• this male mold i is formed by forming an engaging projection 10 having a substantially trapezoidal longitudinal section at the center of an engaging surface 11 which is an end surface of a cylinder.
• the engaging convex portion 10 is composed of a small circular protruding surface 12 protruding from the center of the engaging surface 11 with a dimension T, and a pair of inclined surfaces 12 protruding from the protruding surface 12 toward the engaging surface 11. It has a slope 13a.
• the dimension T is a dimension larger than the thickness of the laminated boards to be joined.
• the slope 13 a is inclined 180 ° away from the small arc 12 a of the protruding surface 12 toward the large arc 11 b on the engagement surface 11 while spreading the hem. are doing.
• the widthwise outer shape of the slope i 3 a is, in plan view, a radial portion 14 a extending radially at 90 ° intervals around the center 11 a of the circle forming the engagement surface 11. It is composed of an arc portion 14 b connecting the radial portion 14 a and each end of the small arc 12 a of the protruding surface 12.
• the protruding line K consisting of 2b (radial part 14a, arc part 14b, arc 12b, arc part 14b, and radial part 14a) Are formed.
• FIGS. 4 to 6 show female dies, of which FIG. 4 is a plan view showing the engagement surface side with the male dies, FIG. 5 is a cross-sectional view taken along the line C--C, and FIG. 6 is a cross-sectional view taken along the line D--D. is there.
• the female die 2 has an end surface of a cylinder as an engagement surface 21, and the engagement surface 21 receives the engagement protrusion 10 of the male die 1. It has a recess 20.
• the engaging concave portion 20 has a cross section perpendicular to the axial direction of the cylinder equal to the planar shape of the engaging convex portion 10, is formed as a hole penetrating in the axial direction, and does not have a bottom surface. Then, the line H on the engagement surface 21 corresponding to the protruding line K of the male mold 1 (radial portion 24a, arc portion 24b, arc 22b, arc portion 24b, and radial portion 2b) 4 in the order of a)).
• the female mold 2 has an inner peripheral line 25 a in the arc portion 24 b and the arc 22 b of the engaging concave portion 20 in a plan view, and the engaging surface 21 and the center 21 a are the same.
• An arc slightly outside the arc 22 b is defined as an outer peripheral line 25 b, and the pressing projection 25 has a protruding surface parallel to the engaging surface 21. That is, the pressing projection 25 is formed along both cut lines of the engagement recess 20 of the female mold 2.
• the protrusion height t of the projection 25 from the engagement surface 21 is the same as that of the male mold 1.
• the height T which is set sufficiently smaller than the height T of the mating convex portion 10, and the thickness L of the laminated metal plate to be joined are set according to the following equation (1). Ah .
• FIGS. 9-11 With the laminated metal plate S interposed between the engaging surface 11 of the male die 1 and the engaging surface 21 of the female die 2 as shown in FIGS. As shown in Figs. 9-11, the two independent cutting lines 3a and the metal plate portion between these cutting lines 3a have a step larger than the thickness of the laminated sheet in the laminating direction.
• a coupling structure 3 composed of the protruding protrusion 3b is formed.
• the protruding portion 3 b has a central portion 32 that protrudes the highest from the metal plate surface V on the side to be cut, and a pair of slope portions 3 that incline while expanding the hem from the central portion 32 toward the surface V. It consists of three.
• 9 is a plan view of the bonding structure 3
• FIG. 10 is a sectional view taken along line EE of FIG.
• FIG. 11 is a sectional view taken along line FF of FIG.
• FIG. 7 is a cross-sectional view showing a state in which the male mold 1 is inserted into the female mold 2 at a plane along the cross section taken along the line B-B in FIG. 1.
• a central part 32 is formed, and a slope part 33 is formed by the slope 13 a of the male mold 1.
• the slope forming portion 34a forming the slope portion 33 of each cutting line 3a is radially spaced at 90 ° intervals from the center point 32A of the central portion 32 in plan view.
• the displacement between the metal plates in all directions of the plate surface of the plate S is prevented. That is, as shown in FIG. 9 (b), since each slope forming portion 34a becomes a resistance against displacement in the direction indicated by the arrow, displacement in all four directions separated by 90 ° can be prevented.
• FIG. 8 is a cross-sectional view showing a state immediately before insertion of the male mold 1 into the female mold 2 and a state of insertion along a section along a line A-A in Fig. 1, and Fig. 8 (a) shows a state immediately before insertion. , (B) shows the inserted state.
• both ends of the central portion 32 of the protruding portion are cut into the cut line P between the male type 1 and the female type 2 by the entry of the engaging projection 10. , it is tensile stretched in the gap M in the stacking direction cut occurring due to the dimensional difference between P 2 (A- a). As a result, the cut end 32a of the central portion 32 has a jagged cross section having a large resistance in the pullout direction.
• a pair of inclined portions 33 from the circular central portion 32 forms a joint structure 3 in which the skirt is widened and inclined, and the planar shape of the formed joint structure 3 is as follows.
• the shape of the central portion 32 is a square, and the slope portion 33 extends from the two opposing sides so that the hem is inclined and the cutting line is cut.
• the slope forming portion 34a of 3a extends radially from the center point 32A of the central portion 32.
• the cutting line 3a is formed in a continuous arc shape at the center portion 32 and the slope portion 33.
• This arc has a tangent line 0,, 0 2 extending radially from the center point 32 A of the central portion 32.
• the pair of slope portions 33 of the protrusion 3 b has a shape in which the skirt narrows from the elliptical central portion 32 toward the surface of the laminate, and is inclined.
• the slope forming portion 34a of the cutting line 3a is radial in the plane of the laminate.
• the force for preventing the metal plate from shifting in all directions in the laminated plate surface and the slope forming portion 34 a are formed. Since it is formed so as to converge outward from the central part 32, the rising part 38 of the slope part 33 when the cutting line 3a has the same length becomes narrower, and the protrusion part 3b The strength at the rising part 3 8 of is reduced. On the other hand, as shown in FIGS. 9, 12, and 13, if the slope forming portion 34a of the cutting line 3a has a shape extending outward from the central portion 32, the protrusion 3b This is preferable because the strength at the rising portion 38 increases.
• the slope forming portion 34a of the cutting line 3a is not necessarily a line extending radially from the center point 32A of the central portion 32, as shown in Figs. 9, 12, and 13 described above. It is not necessary that they are along the circumference, and if the adjacent ones in the circumferential direction are formed so as to face two different directions in the plane of the laminated plate, the distance between the metal plates in all directions on the plate surface of the laminated metal plate S This has the effect of preventing displacement.
• a pressing convex portion 25 is provided on the engaging surface 21 of the female die 2, and the pressing convex portion 25 corresponds to the engaging surface 11 of the male die 1. And may be provided at both the male 1 and female 2 locations. Further, it is not necessary to form the pressing convex portion 25 at a position which coincides with both the cut lines P 2 in the engaging concave portion 20 of the female die 2 which receives the protruding surface 12 of the male die 1 at the time of engagement. without, as shown in FIG. 1 5, by providing the concave portion 2 6 to the portion that matches the two cut Trine P 2, a may be provided pushing projection 2 5 on the outside of both cutlet Trine P 2. With this, laminated gold! After the plate S has been cut in the laminating direction by the gap M described above, the plate S Since the sheet is stretched more in the horizontal direction than in the case of FIG. 8, it is possible to make it difficult for the metal plate to come off in the stacking direction.
• the cross section between the force cut lines P, on the protruding surface of the male mold 1 is shaped so that the center side protrudes from both cut line sides, and as shown in FIG.
• the protruding portion 3b is pressed and deformed so that both cutting lines 3a are closer to the metal plate S on the cut side than the center side in the sectional view taken along the line F--F in Fig. 9 of 3b, the metal plates are laminated.
• the protrusion 3b expands in width (dimension between the two cutting lines 3a) to deform in response to the slip in the direction.
• FIG. 18 is a plan view showing an example in which a metal gasket having a laminated structure is joined by the method of the above-described embodiment.
• the connecting structure 3 of the embodiment is formed on the connecting member 41, unlike the conventional diaper, the connecting structure 3 projects only to one surface side. It is not always necessary to provide the metal gasket, so that the shape of the outer peripheral edge of the metal gasket can be simplified.
• the bonding structure 3 can be formed. Also, if the cylinder head or cylinder block joint surface with the metal gasket is provided with a hole for weight reduction, etc., the metal gasket must be provided with a corresponding hole. Because there is no The connecting structure 3 as described above may be arranged at the position, and the protruding portion 3b may protrude toward the hole.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Gasket Seals (AREA)
• Punching Or Piercing (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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ID=17895237

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (12)

Citations (5)

Family Cites Families (6)

• 1995
  • 1995-11-20 JP JP30130495A patent/JP3224502B2/ja not_active Expired - Fee Related
• 1996
  • 1996-11-20 US US09/043,262 patent/US6115905A/en not_active Expired - Fee Related
  • 1996-11-20 WO PCT/JP1996/003401 patent/WO1997018911A1/ja active IP Right Grant
  • 1996-11-20 KR KR1019980701351A patent/KR100271397B1/ko not_active Expired - Lifetime
  • 1996-11-20 EP EP96938513A patent/EP0879658A1/en not_active Withdrawn

Patent Citations (5)

Non-Patent Citations (1)

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