EP0653255A1 - Neuer nietartiger Verbindungspunkt für Bleche durch Kaltfliessen und Werkzeugmaschine zum Durchführen eines solchen Verbindungspunktes - Google Patents

Neuer nietartiger Verbindungspunkt für Bleche durch Kaltfliessen und Werkzeugmaschine zum Durchführen eines solchen Verbindungspunktes Download PDF

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Publication number
EP0653255A1
EP0653255A1 EP93402793A EP93402793A EP0653255A1 EP 0653255 A1 EP0653255 A1 EP 0653255A1 EP 93402793 A EP93402793 A EP 93402793A EP 93402793 A EP93402793 A EP 93402793A EP 0653255 A1 EP0653255 A1 EP 0653255A1
Authority
EP
European Patent Office
Prior art keywords
shells
tools
matrix
anvil
assembly points
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93402793A
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English (en)
French (fr)
Other versions
EP0653255B1 (de
Inventor
Jean-Claude Chabod
Jean-Claude Faivre
Letterio Sturniolo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HOMAX AG
Original Assignee
HOMAX AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR9206218A priority Critical patent/FR2691388B1/fr
Application filed by HOMAX AG filed Critical HOMAX AG
Priority to EP93402793A priority patent/EP0653255B1/de
Priority to ES93402793T priority patent/ES2124291T3/es
Priority to DE69320969T priority patent/DE69320969T2/de
Publication of EP0653255A1 publication Critical patent/EP0653255A1/de
Application granted granted Critical
Publication of EP0653255B1 publication Critical patent/EP0653255B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D39/031—Joining superposed plates by locally deforming without slitting or piercing

Definitions

  • the present invention relates to the assembly of sheet blanks by cold creep, such an assembly is known in the industry under the term "clinching".
  • spot resistance welding is generally used.
  • coated sheets that is to say, galvanized, lacquered or painted sheets because the heat released during welding destroys the coating.
  • assembly by cold creep which consists in superimposing, at least, two sheet blanks, in keeping them applied against each other by clamps. blanks, to stamp with a punch said blanks against a die in order to form in one of the blanks a cavity whose side wall has, in the vicinity of the bottom, an enlargement, in the other blank being formed a cavity of corresponding shape matching, by its external surface, the shape of the cavity of the first blank.
  • This technique also has numerous advantages over resistance spot welding.
  • the investment is less expensive.
  • the power required is less important.
  • the process is not polluting.
  • the invention relates to tools for producing assembly points for sheet metal blanks by cold creep consisting in simultaneously practicing in two blanks using a punch and a die a circular cavity, the cavities being housed one inside the other and having, in the vicinity of the bottom, an enlargement, said tools comprising a punch, a blank holder and a lower tool having an anvil and supporting a matrix formed of at least two complementary shells movable against the 'action of means tending to bring them closer, stops being provided to limit their spacing, said tools being characterized in that the lower tool has a guide surface for the matrix, the complementary shells being slidably mounted thereon.
  • the matrix has no articulation which generally constitutes a weakening.
  • the position of the stops determines the stroke of the shells as a function of the thickness of the sheet blanks. Thanks to the invention, it is possible to assemble sheet blanks having thicknesses of the order of 3 mm.
  • the anvil has a projecting imprint and the punch a corresponding hollow imprint.
  • the lower tool has, between the guide surface and the anvil, a wall whose diameter in the vicinity of the anvil is less than that located in the vicinity of the guide surface. Thanks to this arrangement, an assembly point can be produced with, in certain places, an additional supply of material.
  • the parts of the wall whose diameters are different between the guide surface and the anvil are connected by a shoulder.
  • the shells have a groove in which is housed a spring, said shells being arranged in a cage integral with the lower tool and pierced with guide holes for studs integral with the shells.
  • means tending to bring the shells together are constituted by jets of compressed air directed against the external surface of said shells.
  • detection means to verify that the displacement of the shells during the formation of the assembly point corresponds to a determined adjustment.
  • the shells are housed in an elastic sleeve itself housed in a split elastic cage.
  • the shells constituting the matrix, as well as the guide surface are perfectly clean, or cold creep obligatorily generates, especially with coated sheets, the formation of small filings.
  • the invention provides, according to another characteristic, means for injecting compressed air between the shells of the matrix. Thus, the small filings are ejected.
  • the means for injecting compressed air between the shells comprise a pump for compressing air and sending it into a balloon through a distributor and means for controlling the opening of a connecting circuit the balloon with the lower tool when the assembly point is finished before said point achieved is released from the matrix.
  • FIG. 1 there is shown a machine 1 which comprises, at its lower part, a support 2 for a die 3, tanfis that at its upper part, there is provided a cylinder 4 supporting a punch 5 intended to cooperate with the matrix 3.
  • Sheet blanks 7 and 8 are inserted between the punch 5 and the die 3, a blank clamp 6 being provided for blocking said sheets.
  • the support 2 is carried by an arm 10 slidably mounted on an axis 11 against the action of a compression spring 12.
  • the arm 10 has an inclined ramp 14 and a bearing surface 15.
  • a rod 17 is slidably mounted, the end of which is integral with a yoke 19 supporting an axis on which a caster rotates 18.
  • the bearing surface 15 bears on the wheel 18 and on the two wings of the yoke 19.
  • the rod 17 can be connected to a control means so that it can occupy a first position in which the roller 18 cooperates with the bearing surface 15 and corresponding to the production of an assembly point for the blanks (see figure 1) and a second position (see FIG. 2) in which the caster 18 is erased so that the die 3 is moved aside to release the blanks 7 and 8 after the assembly point has been made.
  • the machine shown in Figure 4 provides a support 2 a for a die 3 a , a cylinder 4 a supporting a punch 5 a intended to cooperate with the matrix 3 a .
  • the sheet blanks 7 a and 8 a are inserted between the punch 5 a and the die 3 a and held during creep by a blank clamp 6 a .
  • a rod 17 a In the body of the machine is mounted a rod 17 a whose free end is integral with the support 2 a . There is provided a shoe 110 intended to serve as a support for the support 2 a .
  • the support 2 a When making an assembly point, the support 2 a is arranged as shown in FIG. 4. After the assembly point has been made, the rod 17 a is controlled in the direction of the arrow f so that the assembly point thus obtained can be released.
  • Figures 5 to 9 show an embodiment of the matrix 3 or 3 a .
  • This matrix 3 or 3 a consists of four shells 20, 21, 22 and 23 which rest by their lower face on a guide surface 25 of a lower tool 26.
  • the guide surface 25 and the underside of the shells 20 to 23 are perfectly upright so that said shells can slide freely on said surface 25.
  • the lower tool 26 has an anvil 28 with an imprint 27 extending over a diameter of said anvil and affecting the shape of a bar with rounded edges.
  • Each shell has, near its lower edge, a tapped hole 30 into which is screwed a guide pin 31 and, near its upper edge, a groove 32.
  • the shells 20 to 23 are assembled by a toric tension spring 33 inserted in the grooves 32, said shells being housed in a cage 34 pierced with holes 35 in which the pins 31 can slide freely.
  • the cage 34 may include a connector 37 connected to a source of compressed air, so as to send compressed air to prevent small filings which form during the production of the assembly point from interfering with the proper functioning of the matrix, the small filings being thus ejected.
  • the cage 34 extends so as to encompass part of the edge of the lower tool adjacent to the guide surface 25, said cage being fixed by screws 38 which are screwed into tapping 39 and passing through holes 40 in said cage.
  • the blanks are inserted between the punch 5 and the die 3 then, the punch 5 is lowered so that the blank holder 6 blocks the blanks 7 and 8, the punch 5 deforming by stamping cold said blanks to form this assembly point.
  • Figures 10 and 11 show the assembly point obtained.
  • the punch 5 there are formed in the sheets of the cylindrical cavities 7 a and 8 a and in the bottom of the cavities, projections 7 b and 8 b corresponding to the imprint 27 of the anvil 28.
  • the shells 20 to 23 which form the matrix 3 are held together by a spring 33 when the sheet metal blanks 7 and 8 are pinched between the stamping tool 26 and the punch 5, the shells 20 to 23 move apart elastically so that it forms by creep, in the vicinity of the bottom of the cavities 7 a and 8 a , enlargements 7 c and 8 c ensuring an intimate connection between the blanks 7 and 8.
  • the projections 7 b and 8 b of the point assembly oppose any rotation of one of the blanks 7 or 8 relative to the other.
  • An automatic system is provided for sending lightly oiled compressed air into the cage 34 between the shells 20 to 23.
  • the system is shown in FIG. 12 and comprises a pump 43, a drawer 44, a balloon 45 inserted on a pipe 46 with interposition of a non-return valve 47, the balloon 45 being connected by a pipe 49 to the nozzle. 37 of the cage 34.
  • On the pipe 49 being interposed two valves 48 whose opening is controlled when the jack 4 reaches the active end of travel, so that the compressed air stored in the balloon 45 is sent into the cage 34 through the shells 20 to 23 which are spaced from one another (see FIG. 7) which facilitates, of course, the evacuation of small filings, the sending of compressed air sliding during the spacing of the jack 4 and until the assembly point is released from the matrix 3.
  • Figures 13 and 14 show an alternative embodiment of the matrix 3 or 3 a .
  • the references used in the previous figures have been transferred to designate the corresponding elements, but assigned the letter "a".
  • the cage 34 has has stops which may be formed by screws and which limit and set in a very precise manner the spacing of the shells 20 a to 23 a between they.
  • FIGS. 15 and 16 show an alternative embodiment of the matrix which comprises four shells 60, the lower face of which is drawn up to slide on a guide surface 61 of a lower tool 62 which comprises an anvil 63 provided with an imprint formed of two nipples 64 arranged on a diameter of the anvil.
  • the shells 60 are enclosed in a sleeve 66 of flexible and elastic material.
  • the lower tool has a shoulder 67 and the shells 60 a shoulder 68, the sleeve 66 having parts with internal diameters corresponding to the diameter of the different parts so as to assemble them.
  • the sleeve 66 is housed in a cage 70 having, at each end, a flange 71 and a slot 72.
  • the punch used with the matrix of FIG. 15 includes, of course, an imprint corresponding to the nipples 64 and as can be seen in FIGS. 17 and 18 in the sheet metal blanks 7 d and 8 d , cavities 7 e and 8 e with, in the vicinity of the bottom, enlargements 7 f and 8 f , said bottom comprising two bosses 7 g and 8 g .
  • the two blanks are intimately connected by an assembly point opposing any possibility of rotation of a blank relative to one another.
  • an axial duct 74 which opens, by branches 75, between the shells 60 (see FIG. 19), the axial duct 74 comprising a lateral branch connected to the system compressed air delivery (see figure 12).
  • FIGS. 15 and 16 works in the same way as that of the preceding figures, the shells 60 moving apart to allow creep against the action, on the one hand, of the sleeve 66 and, on the other hand, of the cage 70.
  • FIG. 18 shows a variant in which a punch 80 has a shoulder 83 against which a ring 84 for retaining a blank holder 81 is supported, the latter being held by a shoulder 85.
  • the blank holder is made of an elastic material, for example, rubber or plastic having a certain hardness.
  • the punch 80 has an imprint with two blind holes 82 corresponding to the production in the bottom of the point of assembly of the two bosses 7 g and 8 g , while the anvil 88 of the lower tool 89 is provided with two pins 90 of the same type as nipples 64.
  • the lower tool 89 has a groove 92 and a collar 93, the upper surface of which constitutes a guide surface 94 for the die, the latter consisting of shells 95.
  • the shells 95 are preferably four in number, but one can also provide that these are two in number.
  • the shells 95 have a shoulder 96.
  • a sleeve 97 is provided which has a first internal diameter 98 for cooperating with the groove 92, a second internal diameter 99 enclosing the collar 93 and the shells 95 and a third diameter 100 cooperating with the shoulders 96.
  • the sleeve 97 is made of an elastic material, for example rubber, and therefore allows the shells to move apart during creep and return to their initial position when the assembly point is made and the blanks are moved away from the matrix.
  • the lower tool may have, on its anvil 102, a cruciform imprint 103, the punch having a corresponding imprint.
  • an axial duct 105 can be provided in the lower tool which, by means of branches 106, opens out between the branches of the anvil footprint and which is connected by a suitable duct to the control system of compressed air delivery shown in Figure 10.
  • the assembly point of FIGS. 22 and 23 comprises, from the two sheet metal blanks 7 h and 8 h , a cavity 7 i inserted in the cavity 8 i with enlargements 7 d and 8 d in the vicinity of the bottom, the latter with an 8 k and 7 k cruciform boss.
  • FIGS. 24 and 25 show an alternative embodiment of the matrix which is designated here by the general reference 111.
  • This matrix comprises four shells 112, 113, 114 and 115 which rest by their lower face on a guide surface 116 of a lower tool 117.
  • the guide surface 116 and the underside of the shells 112 to 115 are machined so that said shells can slide very freely.
  • the shells 112 to 115 have a groove 118 in which is inserted a toric tension spring 119 which tends to apply the shells 112 to 115 against the lateral surface of the tool 117.
  • Each shell 112 to 115 is secured to a guide pin 120 which can slide in a smooth bore 121 of a cage 122 secured to the tool 117.
  • the cage 122 has four housings 124 which pass through the bores 121 and which receive proximity detectors 125 connected to a comparator 126 into which has been entered in a memory parameters corresponding to a necessary stroke of the shells for the assembly point to be correct.
  • a signal can be emitted and thus one can immediately proceed to an adjustment or a repair if necessary.
  • FIG. 26 also shows an alternative embodiment of the matrix.
  • This matrix is designated as a whole by the reference 130 and comprises a tool 131 with a guide surface 132 for shells 133, on the tool 131 being fixed a cage 134 pierced with bores 135 in which pins 136 are secured shells.
  • the tool 131 comprises an axial channel 137 opening into lateral channels 138 connected to channels 139 opening onto the guide surface 132 opposite the rear face of the shells 133.
  • the axial channel 137 is intended to be connected to a source of compressed air and the jets which open out from the channels 139 are oriented and powerful enough for the shells 133 to be kept applied against a shank 140 of the tool, the upper end of which constitutes an anvil 141 which has a corresponding imprint.
  • the shells 133 move apart against the action of the jets of compressed air to allow by creep to form the assembly point.
  • Figure 27 is an alternative embodiment of the lower tool.
  • the lower tool which is designated by the general reference 250 has a guide surface 151 on which shells such as shells 20 to 23 can slide against the action of a spring 33.
  • the free end of the lower tool ends in an anvil 152 having an imprint 153.
  • the part of the tool 150 extending from the guide surface 151 to the anvil 152 has a first cylindrical part 155 having a large smaller diameter, these two parts being connected by a shoulder 157.
  • Figure 28 shows an assembly point formed in two sheet metal blanks 7 m and 8 m , the punch makes it possible to obtain cavities 7 n and 8 n with, in the vicinity of the bottom, enlargements 7 p and 8 p , said bottom with bosses 7 O and 8 o corresponding to the imprint 153.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP93402793A 1992-05-21 1993-11-17 Neuer nietartiger Verbindungspunkt für Bleche durch Kaltfliessen und Werkzeugmaschine zum Durchführen eines solchen Verbindungspunktes Expired - Lifetime EP0653255B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR9206218A FR2691388B1 (fr) 1992-05-21 1992-05-21 Nouveau point d'assemblage de flans de tole par fluage a froid et machine d'outils pour la realisation d'un tel point d'assemblage.
EP93402793A EP0653255B1 (de) 1992-05-21 1993-11-17 Neuer nietartiger Verbindungspunkt für Bleche durch Kaltfliessen und Werkzeugmaschine zum Durchführen eines solchen Verbindungspunktes
ES93402793T ES2124291T3 (es) 1992-05-21 1993-11-17 Nuevo punto de union de piezas de chapas metalicas mediante deformacion en frio y maquinas herramientas para la realizacion de tal punto de union.
DE69320969T DE69320969T2 (de) 1992-05-21 1993-11-17 Neuer nietartiger Verbindungspunkt für Bleche durch Kaltfliessen und Werkzeugmaschine zum Durchführen eines solchen Verbindungspunktes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9206218A FR2691388B1 (fr) 1992-05-21 1992-05-21 Nouveau point d'assemblage de flans de tole par fluage a froid et machine d'outils pour la realisation d'un tel point d'assemblage.
EP93402793A EP0653255B1 (de) 1992-05-21 1993-11-17 Neuer nietartiger Verbindungspunkt für Bleche durch Kaltfliessen und Werkzeugmaschine zum Durchführen eines solchen Verbindungspunktes

Publications (2)

Publication Number Publication Date
EP0653255A1 true EP0653255A1 (de) 1995-05-17
EP0653255B1 EP0653255B1 (de) 1998-09-09

Family

ID=26134751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93402793A Expired - Lifetime EP0653255B1 (de) 1992-05-21 1993-11-17 Neuer nietartiger Verbindungspunkt für Bleche durch Kaltfliessen und Werkzeugmaschine zum Durchführen eines solchen Verbindungspunktes

Country Status (4)

Country Link
EP (1) EP0653255B1 (de)
DE (1) DE69320969T2 (de)
ES (1) ES2124291T3 (de)
FR (1) FR2691388B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003084694A1 (de) * 2002-04-04 2003-10-16 Tox Pressotechnik Gmbh & Co. Kg Durchsetzfügeverfahren und werkzeug dafür
US7578055B2 (en) * 2001-05-11 2009-08-25 Eugen Rapp Tool for the mechanical connection of plates

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2726494B1 (fr) * 1994-11-08 1996-12-13 Lorraine Laminage Procede d'assemblage de deux flans de tole metallique
DE19929375B4 (de) * 1999-06-25 2008-07-24 Tox Pressotechnik Gmbh & Co. Kg Verfahren, Vorrichtung und Werkzeugeinheit zum Durchsetzfügen
DE102006024112A1 (de) * 2006-05-19 2007-11-22 Eckold Gmbh & Co Kg Matrize zum mechanischen Fügen
DE102014116713A1 (de) * 2014-11-14 2016-05-19 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren zum Verbinden von Metallbändern
EP3769859B1 (de) * 2019-07-24 2021-06-02 BTM Company LLC Blechverbindungsvorrichtung mit einer matrizenanordnung und das verfahren zu seinem zusammenbau
US11446726B2 (en) 2020-05-14 2022-09-20 BTM Company, LLC Metal fastening die assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660403A (en) * 1985-12-19 1987-04-28 Weldex, Inc. Die assembly
GB2189175A (en) * 1986-04-17 1987-10-21 Btm Corp Apparatus for joining sheet material
US5031442A (en) * 1985-06-03 1991-07-16 Btm Corporation Punch anvils for sheet fastening systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB170224A (en) * 1920-12-16 1921-10-20 Joseph Holmes Improved method of and means for attaching handles to the lids of saucepans and other utensils
US3771216A (en) * 1971-10-27 1973-11-13 Johnson Die & Eng Co Method and tooling for extruding a closed end rivet
CH657426A5 (en) * 1981-09-24 1986-08-29 Homax Ag Method and device for the mutual connection of workpieces
DE4111102A1 (de) * 1991-04-05 1992-10-08 Fraunhofer Ges Forschung Vorrichtung zum verbinden von sich ueberlappenden bauteilen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031442A (en) * 1985-06-03 1991-07-16 Btm Corporation Punch anvils for sheet fastening systems
US4660403A (en) * 1985-12-19 1987-04-28 Weldex, Inc. Die assembly
GB2189175A (en) * 1986-04-17 1987-10-21 Btm Corp Apparatus for joining sheet material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7578055B2 (en) * 2001-05-11 2009-08-25 Eugen Rapp Tool for the mechanical connection of plates
WO2003084694A1 (de) * 2002-04-04 2003-10-16 Tox Pressotechnik Gmbh & Co. Kg Durchsetzfügeverfahren und werkzeug dafür

Also Published As

Publication number Publication date
DE69320969D1 (de) 1998-10-15
DE69320969T2 (de) 1999-06-17
FR2691388B1 (fr) 1997-01-31
ES2124291T3 (es) 1999-02-01
EP0653255B1 (de) 1998-09-09
FR2691388A1 (fr) 1993-11-26

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