EP1738842B1 - Verfahren und Vorrichtung zum Verbinden von Platten durch Verpressen - Google Patents

Verfahren und Vorrichtung zum Verbinden von Platten durch Verpressen Download PDF

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Publication number
EP1738842B1
EP1738842B1 EP20050253971 EP05253971A EP1738842B1 EP 1738842 B1 EP1738842 B1 EP 1738842B1 EP 20050253971 EP20050253971 EP 20050253971 EP 05253971 A EP05253971 A EP 05253971A EP 1738842 B1 EP1738842 B1 EP 1738842B1
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EP
European Patent Office
Prior art keywords
plate
caulking
hole
hollow cylindrical
tapered
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EP20050253971
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English (en)
French (fr)
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EP1738842A1 (de
Inventor
Noriaki Kawauchi
Akihiko Satou
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to ES05253971T priority Critical patent/ES2353881T3/es
Priority to DE200560024534 priority patent/DE602005024534D1/de
Priority to EP20050253971 priority patent/EP1738842B1/de
Publication of EP1738842A1 publication Critical patent/EP1738842A1/de
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Publication of EP1738842B1 publication Critical patent/EP1738842B1/de
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    • 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

Definitions

  • the present invention relates to a method and apparatus for joining plates by caulking.
  • Japanese Patent Application First Publication No. 11-239834 discloses a method for caulking metal plates. Caulking is advantageous in comparison with welding in that the facility cost and the number of processes are reduced.
  • Caulking a first plate and a second plate is carried out in the following manner.
  • the first plate having a hole and a hollow cylindrical caulking portion extending from a periphery of the hole is prepared.
  • the caulking portion of the first plate is formed by burring.
  • the second plate having an insertion hole for receiving the caulking portion of the first plate is prepared.
  • the second plate is overlaid on the first plate by inserting the caulking portion of the first plate into the insertion hole of the second plate.
  • the first plate is fastened to the second plate by folding back a tip end portion of the caulking portion over a periphery of the insertion hole on one side surface of the second plate.
  • the joining strength provided by caulking varies greatly depending on an amount of overlapping of the folded-back tip end portion of the caulking portion of the first plate over the periphery of the insertion hole of the second plate, namely, a so-called lap amount of the folded-back tip end portion of the caulking portion.
  • a so-called lap amount of the folded-back tip end portion of the caulking portion In order to increase the lap amount, it is necessary to increase a projecting amount of the caulking portion which projects from a surface of the first plate.
  • a diameter of a bore of the caulking portion will be inevitably increased depending on the burring ratio. Accordingly, if a diameter of the holes formed on the plates must be reduced from the viewpoint of the layout or overall strength of the product, caulking cannot be used at the caulking portion.
  • FIG. 1A is a perspective view of a vehicular panel formed by a method of joining two plates, according to the present invention.
  • FIG. 1B is a section of the vehicular panel, taken along line 1B-1B shown in FIG. 1 .
  • FIGS. 2A-2C are explanatory diagrams illustrating a burring step of the method of the present invention, showing a section of a burring unit of a caulking apparatus used in the method.
  • FIGS. 3A-3B are explanatory diagrams illustrating a caulking step of the method of the present invention, showing a section of a caulking unit of a first embodiment of the caulking apparatus.
  • FIG. 4A is an explanatory diagram illustrating function of the present invention, showing a section of an important portion of the caulking unit of the present invention.
  • FIG. 4B is an explanatory diagram illustrating function of a comparative example, showing a section of an important portion of a caulking unit of the comparative example.
  • FIG. 5 is a diagram similar to FIG. 3B , but showing a section of a caulking unit of a second embodiment of the caulking apparatus.
  • vehicular panel 100 includes two plates 10 and 20 joined with each other.
  • plate 10 has tapered hole 11 and hollow cylindrical caulking portion 12 extending from a periphery of tapered hole 11 on one side surface of plate 10.
  • Plate 20 has insertion hole 21 for receiving caulking portion 12 of plate 10.
  • Plates 10 and 20 are connected with each other by inserting caulking portion 12 of plate 10 into insertion hole 21 of plate 20 and overlaying plate 20 on plate 10, and then caulking a tip end portion of caulking portion 12 which projects from insertion hole 21, so as to fold back the tip end portion of caulking portion 12 over a periphery of insertion hole 21 on one side surface of plate 20.
  • FIGS. 2A-2C and 3A-3B a caulking method of joining plates 10 and 20 and a caulking apparatus used in the caulking method, of a first embodiment of the present invention, will be explained hereinafter.
  • FIGS. 2A-2C show a burring operation of the caulking method and burring unit 30 of the caulking apparatus.
  • FIGS. 3A-3B show a caulking operation of the caulking method and caulking unit 40 of the caulking apparatus.
  • the caulking apparatus is thus constituted of burring unit 30 and caulking unit 40.
  • burring unit 30 is in the form of a press machine including upper and lower dies moveable relative to each other.
  • the upper die includes burring die 35
  • the lower die includes burring punch 31 and retainer 36.
  • burring punch 31 has small-diameter portion 32, large-diameter portion 33 connected with small-diameter portion 32, and shoulder portion 34 disposed between small-diameter portion 32 and large-diameter portion 33.
  • Small-diameter portion 32 serves for forming hollow cylindrical caulking portion 12 of plate 10.
  • Shoulder portion 34 has a tapered surface that is tapered toward small-diameter portion 32 and has an inclination relative to an axis of burring punch 31. Shoulder portion 34 thus has a small-diameter side edge on a side of small-diameter portion 32 and a large-diameter side edge on a side of large-diameter portion 33.
  • Burring die 35 has insertion hole 35A into which small-diameter portion 32 of burring punch 31 is inserted.
  • Retainer 36 supports plate 10 thereon and has guide hole 36A for guiding large-diameter portion 33 of burring punch 31.
  • Insertion hole 35A and guide hole 36A are so arranged as to be substantially in axial alignment with each other when burring die 35 and retainer 36 are held in place in an axially opposed relation to each other.
  • Burring punch 31 is moveable in the axial direction thereof within guide hole 36A of retainer 36. Shoulder portion 34 of burring punch 31 is formed in such a position as to press against a periphery of one end portion of hole 14 of plate 10 when shoulder portion 34 is pushed into hole 14 through guide hole 36A of retainer 36. Shoulder portion 34 serves for forming beveled surface 13 that defines tapered hole 11, as shown in FIG. 2C .
  • Beveled surface 13 is tapered toward a bore of caulking portion 12 and has a section having a linear and inclined contour inclined relative to a center axis of caulking portion 12.
  • Beveled surface 13 has inside edge 13A on a small-diameter side thereof and outside edge 13B on a large-diameter side thereof.
  • Inside edge 13A is formed by the small-diameter side edge of shoulder portion 34
  • outer edge 13B is formed by the large-diameter side edge of shoulder portion 34.
  • Caulking unit 40 shown in FIGS. 3A-3B is in the form of a press machine including upper and lower dies moveable relative to each other.
  • the upper die includes caulking punch 43 and upper retainer 44
  • the lower die includes support die 41 and lower retainer 47.
  • upper retainer 44 has guide hole 44A for guiding caulking punch 43 therein.
  • Caulking punch 43 includes small-diameter portion 46, large-diameter portion 45 connected with small-diameter portion 46, and a shoulder portion between small-diameter portion 46 and large-diameter portion 45. Small-diameter portion 46 is inserted into the bore of caulking portion 12 of plate 10.
  • Guide surface 45A is formed on the shoulder portion.
  • Guide surface 45A serves for guiding the tip end portion of caulking portion 12 of plate 10 which projects beyond insertion hole 21 so as to orient the tip end portion of caulking portion 12 toward the one side surface of plate 20 when the tip end portion of caulking portion 12 is folded back over the periphery of caulking portion 12 as shown in FIG. 3B .
  • Guide surface 45A has an arcuate section which may be in the form of a recess.
  • Small-diameter portion 46 has abutment surface 46A coming into contact with receiving surface 41A of support die 41.
  • Caulking punch 43 is disposed substantially in axial alignment with support die 41 and axially moveable relative thereto within guide hole 44A of upper retainer 44. Caulking punch 43 and support die 41 cooperate with each other to fold back the tip end portion of caulking portion 12 of plate 10 which projects beyond hole 21 of plate 20, over the periphery of hole 21 of plate 20 on the one side surface thereof, while pressing against beveled surface 13 of plate 10 so as to prevent a material of caulking portion 12 from flowing toward the other side surface of plate 10 along the periphery of tapered hole 11.
  • Lower retainer 47 retains plate 10 and plate 20 which overlap each other.
  • Lower retainer 47 has guide hole 47A for guiding support die 41 thereinto.
  • Guide hole 47A of lower retainer 47 and guide hole 44A of upper retainer 44 are so arranged as to be substantially in axial alignment with each other when upper retainer 44 and lower retainer 47 are held in place in an opposed relation to each other.
  • Support die 41 is so disposed as to be moveable in an axial direction thereof within guide hole 47A of lower retainer 47.
  • Support die 41 includes tapered portion 42 which has the same shape as that of tapered hole 11 of plate 10 so as to be engaged with beveled surface 13 surrounding tapered hole 11. Specifically, tapered portion 42 has an inclined surface relative to a central axis of support die 41.
  • the inclined surface has an inclination equivalent to that of beveled surface 13, namely, equivalent to the inclination of shoulder portion 34 of burring punch 31.
  • tapered portion 42 has small-diameter side edge 42A coming into engagement with inside edge 13A of beveled surface 13 of plate 10, and large-diameter side edge 42B coming into engagement with outside edge 13B of beveled surface 13 of plate 10 upon the caulking operation.
  • the method of joining plate 10 and plate 20 by using the caulking apparatus of the first embodiment will be explained hereinafter.
  • the method includes a burring operation using burring unit 30 and a caulking operation using caulking unit 40.
  • burring die 35 and retainer 36 are axially moved closer to each other so as to support plate 10 as the workpiece therebetween.
  • plate 10 is held in a position where hole 14 of plate 10 is substantially in axial alignment with burring punch 31.
  • burring punch 31 is upwardly moved toward plate 10 such that small-diameter portion 32 is pushed into hole 14 of plate 10 and then moved into insertion hole 35A of burring die 35 as shown in FIG. 2B .
  • Burring punch 31 is further upwardly moved until caulking portion 12 of plate 10 is formed with the cooperation of small-diameter portion 32 and burring die 35, and tapered hole 11 of plate 10 is formed with the cooperation of shoulder portion 34 and burring die 35, as shown in FIG. 2B .
  • burring punch 31 During the upward movement of burring punch 31, a material of the periphery of hole 14 of plate 10 undergoes plastic deformation between an outer circumferential surface of small-diameter portion 32 of burring punch 31 and a circumferential periphery of insertion hole 35A of burring die 35. As a result, hollow cylindrical caulking portion 12 of plate 10 is formed on the one side surface of plate 10. As burring punch 31 is further upwardly moved, shoulder portion 34 of burring punch 31 is pressed against the periphery of the one end portion of hole 14 of plate 10 as shown in FIG. 2B . The periphery of the one end portion of hole 14 of plate 10 undergoes coining and thereby is formed into beveled surface 13.
  • tapered hole 11 defined by beveled surface 13 is formed.
  • the material of the periphery of the one end portion of hole 14 is caused to flow toward the tip end side of caulking portion 12 as indicated by arrows shown in FIG. 2B . Therefore, even when hole 14 having a relatively small diameter is subjected to the burring operation of the method of the first embodiment, a sufficient height or dimension of caulking portion 12 which extends from the one side surface of plate 10 can be ensured unlike the conventional burring operation in which no or less material of the periphery of the one end portion of hole 14 flows toward the tip end portion of caulking portion 12.
  • the height of caulking portion 12 can be kept, and the tip end portion of caulking portion 12 can be prevented from suffering from hair crack and further occurrence of cracks during the subsequent caulking operation as explained later. This results in increase in joining strength.
  • burring punch 31 is then downwardly moved and retreated from tapered hole 11 of plate 10. Then, burring die 35 and retainer 36 are axially moved away from each other, and plate 10 formed with tapered hole 11 and caulking portion 12 is taken out. The burring operation is thus accomplished.
  • caulking portion 12 of plate 10 is inserted through insertion hole 21 of plate 20 to project the tip end portion of caulking portion 12 beyond insertion hole 21, and thus plate 20 is overlaid on plate 10.
  • FIGS. 3A-3B plate 20 is overlaid on plate 10.
  • upper and lower retainers 44 and 47 are moved closer to each other so as to support overlapping plates 10 and 20 between upper and lower retainers 44 and 47.
  • overlapping plates 10 and 20 is held in a position where caulking portion 12 of plate 10 is substantially in axial alignment with support die 41 and caulking punch 43.
  • tapered portion 42 is engaged with beveled surface 13 as shown in FIG. 3A .
  • small-diameter side edge 42A of tapered portion 42 is aligned with inside edge 13A of beveled surface 13 of plate 10
  • large-diameter side edge 42B of tapered portion 42 is aligned with outside edge 13B of beveled surface 13 of plate 10.
  • caulking punch 43 is downwardly moved toward caulking portion 12 of plate 10 such that small-diameter portion 46 is inserted into the bore of caulking portion 12.
  • caulking punch 43 As caulking punch 43 is further downwardly moved and small-diameter portion 46 is inserted into the bore of caulking portion 12, the tip end portion of caulking portion 12 is radially outwardly expanded along guide surface 45A of caulking punch 43.
  • small-diameter portion 46 abuts on receiving surface 41A of support die 41 as shown in FIG. 3B , caulking portion 12 is folded back over the periphery of insertion hole 21 on the one side surface of plate 20. The tip end portion of caulking portion 12 is thus caulked onto the periphery of insertion hole 21 of plate 20, so that overlapping plates 10 and 20 are joined with each other.
  • caulking punch 43 is upwardly moved and retreated from caulking portion 12 of plate 10, and support die 41 is downwardly moved and retreated from tapered hole 11 of plate 10. Then, upper and lower retainers 44 and 47 are moved away from each other, and joined plates 10 and 20 are taken out. The caulking operation is thus accomplished.
  • FIG. 4B illustrates a schematic enlarged view of parts of plates 51 and 52 joined with each other in the comparative example.
  • plate 52 includes a hole defined by curved surface 52A and caulking portion 55 extending from a periphery of the hole on one side surface of plate 52.
  • Curved surface 52A is formed by a conventional burring operation.
  • Curved surface 52A has an arcuate section and continuously and smoothly connected with an inner circumferential surface of caulking portion 55 and the other side surface of plate 52.
  • beveled surface 13 defining tapered hole 11 of plate 10 is formed by the burring operation.
  • Beveled surface 13 is tapered toward caulking portion 12 of plate 10 and has a linear and inclined contour in section.
  • Beveled surface 13 has inside edge 13A on the small-diameter side thereof, namely, on the side of caulking portion 12, and outside edge 13B on the large-diameter side thereof.
  • support die 41 having tapered portion 42 is used.
  • Tapered portion 42 of support die 41 has small-diameter side edge 42A and large-diameter side edge 42B which are engageable with inside edge 13A and outside edge 13B of beveled surface 13 of plate 10, respectively.
  • small-diameter side edge 42A and large-diameter side edge 42B With the provision of small-diameter side edge 42A and large-diameter side edge 42B, the shapes of inside edge 13A and outside edge 13B of beveled surface 13 can be surely retained, and the effect of preventing the material flow of caulking portion 12 of plate 10 toward the other side surface thereof upon the caulking operation can be ensured.
  • inside edge 13A and outside edge 13B of beveled surface 13 of plate 10 and small-diameter side edge 42A and large-diameter side edge 42B of tapered portion 42 of support die 41 are provided in order to achieve the effect of suppressing the material flow of caulking portion 12 of plate 10 upon the caulking operation.
  • inside edge 13A and outside edge 13B and small-diameter side edge 42A and large-diameter side edge 42B may be rounded as microscopically viewed.
  • the "edge" used in the description can have all of shapes that can prevent the material of caulking portion 12 of plate 10 from flowing toward the other side surface thereof along the periphery of tapered hole 11.
  • the shapes may be a sharp ridge shape formed by two intersecting planes, and a microscopically rounded shape.
  • the inclination of shoulder portion 34 of burring punch 31 and tapered portion 42 of support die 41 may not be limited to a specific value. However, it is preferred to adjust the inclination of shoulder portion 34 and tapered portion 42 to about 45 degrees in order to obtain a good balance between the effect of allowing the material flow directed toward the one side surface of plate 10 upon the burring operation and the effect of suppression of the material flow directed from caulking portion 12 of plate 10 toward the other side surface thereof along the periphery of tapered hole 11 upon the caulking operation.
  • beveled surface 13 has the linear and inclined contour in section as explained above.
  • caulking portion 12 of plate 10 is caulked to plate 20.
  • the material of caulking portion 12 can be prevented from flowing toward the other side surface of plate 10 along the periphery of tapered hole 11. Therefore, even in a case where a reduced-diameter side of tapered hole 11, namely, the bore of caulking portion 12 has a relatively small diameter, sufficient lapping amount La of caulking portion 12 can be effectively attained and sufficient joining strength of plates 10 and 20 can be obtained. Accordingly, even when a diameter of the reduced-diameter side of tapered hole 11 of plate 10 must be set relatively small in view of layout of a finished product and strength of the finished product as a whole, the caulking operation can be suitably performed.
  • caulking portion 12 and beveled surface 13 of plate 10 can be readily formed by small-diameter portion 32 and shoulder portion 34 of burring punch 31, respectively.
  • caulking unit 140 includes lower retainer 48 having support surface 48B on which overlapping plates 10 and 20 are retained such that a lower surface of plate 10 is contacted with support surface 48B.
  • Lower retainer 48 includes guide hole 48A for guiding support die 41 and recess 60 open to guide hole 48A.
  • Recess 60 is radially inwardly disposed on support surface 48B.
  • Stepped portion 61 is formed between support surface 48B and a bottom of recess 60.
  • Edge 61A is formed at a boundary between support surface 48B and stepped portion 61.
  • Edge 61A is engaged with the lower surface of plate 10 to thereby prevent the material of caulking portion 12 of plate 10 from flowing toward an upper side surface of plate 10 along the periphery of tapered hole 11 upon the caulking operation.
  • a depth of recess 60 namely, a height of stepped portion 61 is 1 mm or less, preferably, about 0.5 mm.
  • a radial length of recess 60 may be several millimeters.
  • Caulking unit 140 are thus formed with edge 61A of lower retainer 48 in addition to small-diameter side edge 42A and large-diameter side edge 42B of tapered portion 42 of support die 41.
  • edge 61A of lower retainer 48 the flow of the material of caulking portion 12 of plate 10 toward the upper side surface thereof along the periphery of tapered hole 11 upon the caulking operation can be more effectively prevented.
  • the caulking operation can be suitably performed even when a diameter of the reduced-diameter side of tapered hole 11, namely, a diameter of the bore of caulking portion 12 must be set relatively small in view of layout of a finished product and strength of the finished product as a whole.
  • caulking portion 12 and beveled surface 13 of plate 10 is not limited to burring, i.e., punching as explained the above-described embodiments, and may be performed by forging.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Forging (AREA)

Claims (16)

  1. Verstemmverfahren zum Verbinden einer ersten Platte (10) mit einem kegelförmigen Durchgangsloch (11), das in Richtung einer Seitenfläche der ersten Platte kegelförmig ist und durch eine abgeschrägte Fläche (13) definiert wird, und einem hohlen, zylindrischen Stemmabschnitt (12), der sich von einem Umfang des kegelförmigen Loches auf der einen Seitenfläche der ersten Platte aus erstreckt und ein Durchgangsloch aufweist, und einer zweiten Platte (20) mit einem Loch (21), wobei das Verstemmverfahren die folgenden Schritte aufweist:
    Einsetzen des hohlen, zylindrischen Stemmabschnittes (12) der ersten Platte (10) durch das Loch (21) der zweiten Platte (20), damit ein Kopfendabschnitt des hohlen, zylindrischen Stemmabschnittes (12) über das Loch (21) hinaus vorsteht und die zweite Platte (20) über der ersten Platte (10) liegt; und
    Zurückfalten des Kopfendabschnittes des hohlen, zylindrischen Stemmabschnittes (12) der ersten Platte (10) über einen Umfang des Loches (21) der zweiten Platte (20) auf einer Seitenfläche der zweiten Platte (20), während gegen die abgeschrägte Fläche (13) der ersten Platte (10) gepresst wird, um somit zu verhindern, dass Material des hohlen, zylindrischen Stemmabschnittes (12) in Richtung der anderen Seitenfläche der ersten Platte (10) längs des Umfangs des kegelförmigen Durchgangsloches (11) fließt.
  2. Verstemmverfahren nach Anspruch 1, bei dem die abgeschrägte Fläche (13) einen inneren Rand (13A) auf einer Seite davon mit kleinem Durchmesser und einen äußeren Rand (13B) auf einer Seite davon mit großem Durchmesser aufweist, und wobei die Pressgegenwirkung ein Eingreifen mit dem inneren Rand (13A) und dem äußeren Rand (13B) der abgeschrägten Fläche (13) aufweist.
  3. Verstemmverfahren nach Anspruch 2, bei dem die Pressgegenwirkung außerdem einen Eingriff mit der anderen Seitenfläche der ersten Platte aufweist.
  4. Verstemmverfahren nach einem der Ansprüche 1 bis 3, bei dem der Zurückfaltvorgang den Schritt des Führens des Kopfendabschnittes des hohlen, zylindrischen Stemmabschnittes (12) der ersten Platte (10) aufweist, um so den Kopfendabschnitt des hohlen, zylindrischen Stemmabschnittes (12) in Richtung der einen Seitenfläche der zweiten Platte (20) auszurichten.
  5. Verstemmverfahren nach einem der Ansprüche 1 bis 4, das außerdem den Schritt aufweist, bei dem ein Werkstück mit einem Loch abgegratet wird, um die abgeschrägte Fläche (13) und den hohlen, zylindrischen Stemmabschnitt (12) der ersten Platte bereitzustellen.
  6. Verstemmverfahren nach Anspruch 5, bei dem der Abgratvorgang das Stanzen des Werkstückes aufweist, um ein Material des Werkstückes um das Durchgangsloch herum in Richtung der einen Seitenfläche zu drücken, um den hohlen, zylindrischen Stemmabschnitt (12) der ersten Platte (10) zu formen.
  7. Verstemmverfahren nach einem der Ansprüche 1 bis 4, das außerdem den Schritt aufweist, bei dem ein Werkstück mit einem Loch geschmiedet wird, um die abgeschrägte Fläche und den hohlen, zylindrischen Stemmabschnitt der ersten Platte bereitzustellen.
  8. Stemmvorrichtung für das Verbinden einer ersten Platte (10) mit einem kegelförmigen Durchgangsloch (11), das in Richtung einer Seitenfläche der ersten Platte (10) kegelförmig ist und durch eine abgeschrägte Fläche mit einem inneren Rand (13A) und einem äußeren Rand (13B) definiert wird, und einem hohlen, zylindrischen Stemmabschnitt (12), der sich von einem Umfang des kegelförmigen Durchgangsloches (11) auf der einen Seitenfläche der ersten Platte aus erstreckt und ein Durchgangsloch aufweist, und einer zweiten Platte (20) mit einem Loch (21), wobei die Stemmvorrichtung aufweist:
    eine Stemmeinheit (40; 140), die aufweist:
    einen Stemmstempel (43), der axial beweglich angeordnet ist; und
    ein Auflagewerkzeug (41) mit einem kegelförmigen Abschnitt (42) für das Pressen gegen die abgeschrägte Fläche (13) der ersten Platte (10), wobei das Auflagewerkzeug im Wesentlichen in axialer Ausrichtung mit dem Stemmstempel (43) angeordnet und axial beweglich ist, damit es in das kegelförmige Durchgangsloch (11) der ersten Platte (10) eingesetzt werden kann, wobei der Stemmstempel (43) außerdem einen Abschnitt (46) mit kleinem Durchmesser, einen Abschnitt (45) mit großem Durchmesser, der mit dem Abschnitt (46) mit kleinem Durchmesser verbunden ist, und einen Absatzabschnitt (34) zwischen dem Abschnitt mit kleinem Durchmesser und dem Abschnitt mit großem Durchmesser aufweist, wobei sich der Abschnitt (46) mit kleinem Durchmesser axial erstreckt, damit er in die Durchgangsbohrung des hohlen, zylindrischen Stemmabschnittes (12) der ersten Platte (10) und das Loch (21) der zweiten Platte (20) eingesetzt werden kann,
    wobei der Stemmstempel (43) und das Auflagewerkzeug (41) miteinander zusammenwirken, um einen Kopfendabschnitt des hohlen, zylindrischen Stemmabschnittes (12), der über das Loch der zweiten Platte hinaus vorsteht, über einen Umfang des Loches der zweiten Platte auf der einen Seitenfläche der zweiten Platte (20) zurückzufalten, während gegen die abgeschrägte Fläche (13) der ersten Platte (10) gepresst wird, um so zu verhindern, dass ein Material des hohlen, zylindrischen Stemmabschnittes (12) in Richtung der anderen Seitenfläche der ersten Platte (10) längs des Umfanges des kegelförmigen Durchgangsloches (11) fließt.
  9. Stemmvorrichtung nach Anspruch 8, bei der der kegelförmige Abschnitt (42) des Auflagewerkzeuges (41) einen Seitenrand (42A) mit kleinem Durchmesser und einen Seitenrand (42B) mit großem Durchmesser aufweist, die jeweils mit dem inneren Rand (13A) und dem äußeren Rand (13B) der abgeschrägten Fläche (13) der ersten Platte (10) in Eingriff kommen können.
  10. Stemmvorrichtung nach Anspruch 8 oder 9, bei der der Stemmstempel außerdem eine Führungsfläche (45A) aufweist, die auf dem Absatzabschnitt gebildet wird, wobei die Führungsfläche für das Führen des Kopfendabschnittes des hohlen, zylindrischen Stemmabschnittes der ersten Platte ausgebildet ist, um so den Kopfendabschnitt des hohlen, zylindrischen Stemmabschnittes in Richtung der einen Seitenfläche der zweiten Platte auszurichten.
  11. Stemmvorrichtung nach Anspruch 8, 9 oder 10, bei der die Stemmeinheit außerdem eine Feststelleinrichtung (48) mit einem Führungsloch (48A) für das Führen des Abschnittes des Stemmstempels mit großem Durchmesser aufweist.
  12. Stemmvorrichtung nach einem der Ansprüche 8 bis 11, bei der die Stemmeinheit außerdem eine Feststelleinrichtung für das Feststellen der sich einander überdeckenden ersten Platte (10) und zweiten Platte (20) aufweist, wobei die Feststelleinrichtung eine Auflagefläche (48B), die so ausgebildet ist, dass sie mit der anderen Seitenfläche der ersten Platte in Kontakt ist, und ein Führungsloch (48A) für das Führen des Auflagewerkzeuges aufweist.
  13. Stemmvorrichtung nach Anspruch 12, bei der die Feststelleinrichtung aufweist: eine Aussparung (60), die radial nach innen auf der Auflagefläche (48B) ausgebildet und zum Führungsloch (48A) offen ist; einen abgestuften Abschnitt (61) zwischen der Auflagefläche (48B) und einem Boden der Aussparung (60); und einen Rand (61A) zwischen dem abgestuften Abschnitt (61) und der Auflagefläche (48B), wobei der Rand (61A) der Feststelleinrichtung mit der anderen Seitenfläche der ersten Platte (10) in Eingriff kommen kann.
  14. Stemmvorrichtung nach einem der Ansprüche 8 bis 13, die außerdem eine Abgrateinrichtung (30) dafür aufweist, dass das Werkstück mit einem Loch abgegratet wird, wobei die Abgrateinrichtung (30) einen Abgratstempel (31) aufweist, der axial beweglich ist und einen Abschnitt (32) mit kleinem Durchmesser, einen Abschnitt (33) mit großem Durchmesser, der mit dem Abschnitt (32) mit kleinem Durchmesser verbunden ist, und einen Absatzabschnitt (34) aufweist, der zwischen dem Abschnitt (32) mit kleinem Durchmesser und dem Abschnitt (33) mit großem Durchmesser angeordnet und in Richtung des Abschnittes (32) mit kleinem Durchmesser kegelförmig ist, wobei der Abschnitt (32) mit kleinem Durchmesser so ausgebildet ist, dass er in das Loch des Werkstückes gedrückt wird, um den hohlen, zylindrischen Stemmabschnitt (12) der ersten Platte (10) zu bilden, wobei der Absatzabschnitt (34) so ausgebildet ist, dass er gegen einen Umfang des Loches des Werkstückes presst, um die abgeschrägte Fläche (13) der ersten Platte (10) zu bilden.
  15. Stemmvorrichtung nach Anspruch 14, bei der die Abgrateinrichtung (30) außerdem ein Abgratwerkzeug (35) aufweist, das im Wesentlichen in axialer Ausrichtung mit dem Abgratstempel (31) angeordnet ist, wobei das Abgratwerkzeug (35) mit dem Abgratstempel (31) zusammenwirkt, um den hohlen, zylindrischen Stemmabschnitt (12) und die abgeschrägte Fläche (13) der ersten Platte (10) zu bilden.
  16. Stemmvorrichtung nach Anspruch 8, bei der der Stemmstempel (43) und das Auflagewerkzeug (41) Flächen (46A, 41A) aufweisen, die durch eine relative axiale Bewegung des Stemmstempels und des Auflagewerkzeuges miteinander in Kontakt gebracht werden können.
EP20050253971 2005-06-27 2005-06-27 Verfahren und Vorrichtung zum Verbinden von Platten durch Verpressen Active EP1738842B1 (de)

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ES05253971T ES2353881T3 (es) 2005-06-27 2005-06-27 Procedimiento y aparato para unión de las placas mediante punzonado-recalcado.
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US4174559A (en) * 1978-02-09 1979-11-20 J.J. & M. Fastening method
FR2619169B1 (fr) * 1987-08-07 1989-10-06 Tubauto Procede et dispositif pour la liaison rapide de deux pieces presentant, en general, des zones de recouvrement planes
JPH11239834A (ja) 1998-02-23 1999-09-07 Unipres Corp 板状金属材の接合構造
FR2802453B1 (fr) * 1999-12-15 2002-03-08 Cottinet Procede d'assemblage sans soudure de toles, de type boutonnage
JP4056325B2 (ja) 2002-08-29 2008-03-05 三菱重工業株式会社 凝縮器及び冷凍機
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