EP0653255B1 - Nouveau point d'assemblage de flans de tÔle par fluage à froid et machine d'outils pour la réalisation d'un tel point d'assemblage - Google Patents
Nouveau point d'assemblage de flans de tÔle par fluage à froid et machine d'outils pour la réalisation d'un tel point d'assemblage Download PDFInfo
- Publication number
- EP0653255B1 EP0653255B1 EP93402793A EP93402793A EP0653255B1 EP 0653255 B1 EP0653255 B1 EP 0653255B1 EP 93402793 A EP93402793 A EP 93402793A EP 93402793 A EP93402793 A EP 93402793A EP 0653255 B1 EP0653255 B1 EP 0653255B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shells
- tool
- point
- matrix
- punch
- 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.)
- Expired - Lifetime
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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 a tool for making assembly points sheet metal blanks by cold flow according to the preamble of claim 1. Such an assembly is known in the industry as "clinching".
- the assembly by creep cold which consists of superimposing, at least, two blanks to keep them applied one against the other by blank clamps, to be stamped using a punch said blanks against a die in order to form in one of blanks a cavity whose side wall has, in the vicinity from the bottom, an enlargement, in the other blank being formed a cavity of corresponding shape marrying, by its external surface, the shape of the cavity of the first blank.
- This technique also presents, compared to spot resistance welding, very many advantages.
- the investment is less expensive.
- the power required is less important.
- the process is not polluting.
- British Patent No. 2,189,175 describes a provision close to that of American patent n ° 5 031 442 but in which the shells have a tilting radius more important than in the previous case so that the sheets are better held at their bottom surface, however, as in the embodiment described in the English patent, considering that there is always filings cutting during the assembly point formation, you cannot be assured that the tipping of the shells will be uniform.
- One of the aims of the present invention is to remedy these drawbacks.
- this goal is achieved by a tool for the realization of assembly points for sheet metal blanks by cold creep consisting in practicing, simultaneously, in two blanks of sheet metal using a punch and a die a cavity circular, the cavities being housed one inside the other and having, in the vicinity of the bottom, an enlargement, said tool being of the type comprising a punch, a blank clamps and a bottom tool with an anvil and supporting a matrix formed of at least two shells complementary mobile on a tool guide surface inferior against the action of means tending to bring them together, stops being provided to limit their spacing, Shells complementary being slidably mounted on the surface of guidance in two opposite and arranged directions in a cage secured to the lower tool, characterized in that said cage is breakthrough guide holes for guide pins integral with said shells and sliding in said guide holes.
- the matrix does not present no articulation which generally constitutes a weakening.
- the position of the stops determines the stroke shells according to the thickness of the sheet blanks and we can look like sheet blanks with thicknesses on the order of 3mm.
- the means tending to bring the shells together are formed by compressed air jets directed against the external surface said shells.
- detection means it is possible to provide detection means to verify that the displacement shells, during point formation assembly, corresponds to a determined setting.
- FIG. 1 there is shown a machine 1 which includes, at its lower part, a support 2 for a matrix 3, while at its top it is provided with a jack 4 supporting a punch 5 intended to cooperate with matrix 3.
- Sheet blanks 7 and 8 are inserted between the punch 5 and the die 3, a blank holder 6 being provided to block said sheets.
- the support 2 is carried by an arm 10 mounted sliding on an axis 11 against the action of a spring compression 12.
- the arm 10 has an inclined ramp 14 and a support surface 15.
- a rod 17 In the body of the machine is mounted sliding a rod 17 whose end is secured to a yoke 19 supporting an axis on which a caster rotates 18.
- the surface support 15 is on the wheel 18 and on the two wings of clevis 19.
- the rod 17 can be connected to a means of command so that it can occupy a first position in which the caster 18 cooperates with the bearing surface 15 and corresponding to the creation of an assembly point blanks (see Figure 1) and a second position (see Figure 2) in which the wheel 18 is deleted so that the matrix 3 is discarded to release the blanks 7 and 8 after completion of the assembly point.
- Figure 4 there is shown a machine for Figure 1.
- the references have been transferred used in Figures 1 and 2 to designate the organs corresponding but assigned the letter "a".
- the machine shown in Figure 4 provides a support 2a for a matrix 3a, a jack 4a supporting a punch 5a intended to cooperate with the matrix 3a.
- the sheet blanks 7'a and 8'a are inserted between the punch 5a and the matrix 3a and maintained during the creep by a blank holder 6a.
- a rod 17a In the body of the machine is mounted a rod 17a, the free end of which is integral with the support 2a. There is provided a shoe 110 intended to serve as a support for support 2a.
- the support 2a When making an assembly point, the support 2a is arranged as shown in FIG. 4. After the assembly point has been made, the rod 17a 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 matrix 3 or 3a.
- This matrix 3 or 3a consists of four shells 20, 21, 22 and 23 which rest on their underside on a guide surface 25 of a lower tool 26.
- the guide surface 25 and the underside shells 20 to 23 are perfectly erected 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 edges rounded.
- Each shell has, in the vicinity of its lower edge, a tapped hole 30 into which is screwed a guide pin 31 and, near its edge upper, a throat 32.
- the shells 20 to 23 are assembled by a toroidal tension spring 33 inserted in the grooves 32, said shells being housed in a cage 34 pierced 35 holes in which can slide freely nipples 31.
- the cage 34 may include a connector 37 connected to a compressed air source, to send compressed air to prevent small filings that form during of the assembly point interfere with proper operation of the matrix, the small filings being thus ejected.
- the cage 34 extends in order to encompass part from the edge of the lower tool adjacent to the guide surface 25, said cage being fixed by screws 38 which are screwed into threads 39 and passing through holes 40 of 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 point assembly obtained.
- cylindrical cavities 7a and 8a are formed in the sheets and in the bottom of the cavities of projections 7b and 8b corresponding to the imprint 27 of the anvil 28.
- the shells 20 to 23 which form the matrix 3 are maintained assembled by a spring 33 when the sheet metal blanks 7 and 8 are pinched between the drawing tool 26 and the punch 5, the shells 20 to 23 move apart elastically so that it forms, by creep, at the near the bottom, cavities 7a and 8a, enlargements 7c and 8c ensuring an intimate connection between the blanks 7 and 8.
- the projections 7b and 8b of the assembly point oppose any rotation of one of the blanks 7 or 8 relative to the other.
- the system is shown in Figure 12 and includes a pump 43, a drawer 44, a balloon 45 inserted on a pipe 46 with interposition of a valve non-return 47, the ball 45 being connected by a pipe 49 at the end piece 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 separated from each other (see Figure 7) which of course facilitates the evacuation of small filings, sending compressed air sliding during the spacing of the cylinder 4 and until the point assembly is released from the matrix 3.
- FIGs 13 and 14 there is shown a alternative embodiment of the matrix 3 or 3a.
- the references used in the figures are reported to designate the corresponding elements, but affected by the letter "a”.
- the cage 34a has stops which can be formed by screws and which limit and to adjust the spacing of the shells 20a to 23a between them.
- the lower tool (see Figure 15) can present a cruciform imprint on its anvil 102 103, the punch having a corresponding imprint.
- the assembly point of Figures 16 and 17 includes, from the two sheet blanks 7h and 8h, a cavity 7i inserted into cavity 8i with enlargements 7d and 8d in the vicinity of the bottom, the latter presenting a 8k and 7k cross boss.
- This matrix includes 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 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 a toroidal tension spring is inserted 119 which tends to apply the shells 112 and 115 against the lateral surface of the tool 117.
- Each shell 112 to 115 is integral with a guide pin 120 which can slide in a bore smooth 121 of a cage 122 integral with the tool 117.
- the cage 122 has four housings 124 which pass through bores 121 and receive detectors proximity 125 connected to a comparator 126 in which has been entered in a corresponding parameter memory at a necessary stroke of the shells so that the point assembly is correct.
- FIG. 20 again shows an alternative embodiment of the matrix.
- This matrix is designated in its together by reference 130 and includes 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 are guided pins 136 integral with the shells.
- Tool 131 has an axial channel 137 opening into side 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 that open out channels 139 are oriented and powerful enough that the shells 133 are kept applied against a tail 140 of the tool, the upper end of which constitutes a anvil 141 which has a corresponding imprint.
- the shells 133 move apart against the action of compressed air jets to allow creep to form the assembly point.
- Figure 21 is an alternative embodiment of the lower tool.
- the tool lower which is designated by the general reference 150 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 by an anvil 152 comprising an imprint 153.
- the part of the tool 150 extending from the guide surface 151 at the anvil 152 has a first cylindrical part 155 having a smaller large diameter, these two parts being connected by a shoulder 157.
- Figure 22 shows an assembly point formed in two 7m and 8m sheet blanks, the punch allows to obtain 7n and 8n cavities with enlargements near the bottom 7p and 8p, said bottom comprising bosses 7o and 8o corresponding to the imprint 153.
- the material is pushed back between the inner side surface shells and part 156 it's sort of formed bead 81.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Description
Claims (4)
- Outil pour la réalisation de points d'assemblage de flans de tôle par fluage à froid consistant à pratiquer, simultanément, dans deux flans de tôle (7, 8; 7'a, 8'a; 7h; 8h; 7m, 8m) à l'aide d'un poinçon et d'une matrice une cavité circulaire (7a, 8a; 7i, 8i; 7n, 8n), les cavités (7a, 8a; 7i; 8i; 7n, 8n) étant logées l'une dans l'autre et présentant, au voisinage du fond, un élargissement (7c, 8c; 7j, 8j; 7p, 8p) ledit outil étant du type comprenant un poinçon (5; 5a), un serre-flans (6; 6a) et un outil inférieur (26; 117; 131; 150) présentant une enclume (28; 102; 141; 152) et supportant une matrice (3; 3a; 111; 130) formée d'au moins deux coquilles complémentaires (20-23; 20a-23a; 112-115; 133) mobiles sur une surface de guidage (25; 116-132; 151) de l'outil inférieur (26; 117; 131; 150) contre l'action de moyens (33; 119; 137-139) tendant à les rapprocher, des butées étant prévues pour limiter leur écartement, les coquilles complémentaires (20-23; 20a-23a; 112-115; 133) étant montées glissantes sur la surface de guidage (25; 116; 132; 151) dans deux directions opposées et disposées dans une cage (34; 34a; 122; 134) solidaire de l'outil inférieur (26; 117; 131; 150), caractérisé en ce que ladite cage (34; 34a; 122; 134) est percée de trous de guidage (35; 135) pour des tétons de guidage (31; 31a; 120; 136) solidaires desdites coquilles (20-23; 20a-23a; 112-115; 133) et coulissant dans lesdits trous de guidage (35; 135).
- Outil pour la réalisation de points d'assemblage, selon la revendication 1, caractérisé en ce qu'il comporte quatre coquilles (20, 21, 22, 23; 21a, 22a, 23a; 112, 113, 114, 115), deux coquilles opposées étant glissantes dans deux directions opposées, tandis que les deux autres coquilles opposées sont glissantes dans des directions opposées perpendiculaires à celles des premières coquilles opposées.
- Outil pour la réalisation de poins d'assemblage, selon la revendication 1, caractérisé en ce que les moyens tendant à rapprocher les coquilles (133) sont constitués par des jets d'air comprimé dirigés contre la surface externe desdites coquilles (133).
- Outil pour la réalisation de points d'assemblage, selon la revendication 1, caractérisé en ce qu'il comporte des moyens de détection (125, 126) pour verifier que le déplacement des coquilles (20-23; 20a-23a; 112-115; 133) au cours de la formation du point d'assemblage correspond à un réglage prédéterminé.
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. |
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 |
EP93402793A EP0653255B1 (fr) | 1992-05-21 | 1993-11-17 | Nouveau point d'assemblage de flans de tÔle par fluage à froid et machine d'outils pour la réalisation d'un tel point d'assemblage |
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 (fr) | 1992-05-21 | 1993-11-17 | Nouveau point d'assemblage de flans de tÔle par fluage à froid et machine d'outils pour la réalisation d'un tel point d'assemblage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0653255A1 EP0653255A1 (fr) | 1995-05-17 |
EP0653255B1 true EP0653255B1 (fr) | 1998-09-09 |
Family
ID=26134751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93402793A Expired - Lifetime EP0653255B1 (fr) | 1992-05-21 | 1993-11-17 | Nouveau point d'assemblage de flans de tÔle par fluage à froid et machine d'outils pour la réalisation d'un tel point d'assemblage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0653255B1 (fr) |
DE (1) | DE69320969T2 (fr) |
ES (1) | ES2124291T3 (fr) |
FR (1) | FR2691388B1 (fr) |
Families Citing this family (8)
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 |
BR0209533B1 (pt) * | 2001-05-11 | 2011-02-08 | ferramenta para acabamento mecánico de placas. | |
BR0308971A (pt) * | 2002-04-04 | 2005-01-11 | Tox Pressotechnik Gmbh | Processo de ensamblagem composta e respectiva ferramenta |
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 (fr) * | 2019-07-24 | 2021-06-02 | BTM Company LLC | Appareil d'assemblage de tôle comportant un ensemble de moule et la méthode de son assemblage |
US11446726B2 (en) | 2020-05-14 | 2022-09-20 | BTM Company, LLC | Metal fastening die assembly |
Family Cites Families (7)
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 |
US4757609A (en) * | 1980-09-08 | 1988-07-19 | Btm Corporation | Apparatus for joining sheet material |
CH657426A5 (en) * | 1981-09-24 | 1986-08-29 | Homax Ag | Method and device for the mutual connection of workpieces |
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 |
DE4111102A1 (de) * | 1991-04-05 | 1992-10-08 | Fraunhofer Ges Forschung | Vorrichtung zum verbinden von sich ueberlappenden bauteilen |
-
1992
- 1992-05-21 FR FR9206218A patent/FR2691388B1/fr not_active Expired - Fee Related
-
1993
- 1993-11-17 ES ES93402793T patent/ES2124291T3/es not_active Expired - Lifetime
- 1993-11-17 DE DE69320969T patent/DE69320969T2/de not_active Expired - Fee Related
- 1993-11-17 EP EP93402793A patent/EP0653255B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2691388B1 (fr) | 1997-01-31 |
DE69320969D1 (de) | 1998-10-15 |
DE69320969T2 (de) | 1999-06-17 |
EP0653255A1 (fr) | 1995-05-17 |
FR2691388A1 (fr) | 1993-11-26 |
ES2124291T3 (es) | 1999-02-01 |
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