EP0872294A1 - Punch for making a hole in a metal plate - Google Patents

Punch for making a hole in a metal plate Download PDF

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Publication number
EP0872294A1
EP0872294A1 EP98400115A EP98400115A EP0872294A1 EP 0872294 A1 EP0872294 A1 EP 0872294A1 EP 98400115 A EP98400115 A EP 98400115A EP 98400115 A EP98400115 A EP 98400115A EP 0872294 A1 EP0872294 A1 EP 0872294A1
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EP
European Patent Office
Prior art keywords
punch
hole
calibration
ramps
wall
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.)
Ceased
Application number
EP98400115A
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German (de)
French (fr)
Inventor
Raymond Gilbert Marcel Federspiel
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.)
Faurecia Sieges dAutomobile SAS
Original Assignee
Compagnie Europeenne de Sieges pour Automobiles CESA
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
Application filed by Compagnie Europeenne de Sieges pour Automobiles CESA filed Critical Compagnie Europeenne de Sieges pour Automobiles CESA
Publication of EP0872294A1 publication Critical patent/EP0872294A1/en
Ceased 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies

Definitions

  • the present invention relates to a punch for the formation of a hole in a metal wall.
  • Such a frame is usually provided with several holes intended for example for fixing axes seat adjustment mechanisms or the attachment of suspension plies for seat pads.
  • the edge of a hole obtained by punching presents a deformation in the bowl which is all the more pronounced and annoying that the diameter of the hole is important.
  • the object of the invention is in particular to allow the hole formation in metallic tubular elements of various sections, using simple means allowing to minimize the deformations of these tubular elements.
  • the invention relates to a punch of the aforementioned type, characterized in that the part of penetration has a general shape of a flat blade, substantially parallel to a longitudinal axis of the punch, delimited by a pointed outline forming a corner dihedral substantially perpendicular to the longitudinal axis of the punch, the penetration part being connected to the part calibration by a connecting part comprising two ramps of opposite inclinations, the normal at each point of each ramp being substantially parallel to a plane parallel to the longitudinal axis and to the edge.
  • the invention also relates to the use of the punch as defined above to form a hole in a metallic tubular element, in particular a tubular metal frame for vehicle seat automobile.
  • FIG. 1 a punch 10 according to a first embodiment of the invention, intended to be mounted on a punching device classic.
  • the punch 10 has a shape general elongated X axis.
  • the punch 10 is intended to form a hole T in particular in a metallic tubular element 12 (shown in Figures 2 to 8), for example an element of armature for motor vehicle seat.
  • the element tubular 12 has a substantially rectangular section.
  • the punch 10 is connected to the device for punching in a manner known per se, by means of a head hanging 14.
  • the punch 10 includes a part 16 of penetration into the wall defining the tubular element 12 and a part for calibrating the hole T, for example of substantially polygonal section, in particular square, as this is illustrated in Figure 1.
  • the penetration part 16 has a general shape flat blade, substantially parallel to the X axis. part 16 is delimited by a pointed outline (in V) forming an edge dihedral 20 substantially perpendicular to the X axis.
  • the penetration part 16 is connected to the part 18 by a connecting part 22 comprising two ramps 24, 26 of opposite inclinations. Normal in each point of each ramp is substantially parallel to a plane parallel to the longitudinal axis X and to the edge 20.
  • the ramps 24, 26 are delimited by intersecting oblique planes following a line substantially orthogonal to the edge 20 of the dihedral.
  • the ramps can be delimited by portions of circular base cylinders tangent to the faces of the penetration part 16.
  • the ramps 24, 26 are offset axially with respect to each other.
  • the blade 16 When entering the wall of the tubular element 12, the blade 16 forms a slot 28 of substantially contour rectangular. The short sides of the slot 18 are extended by two metal shavings 30.32, detached partially by the blade 16, connected to the wall of the tubular element 12 (see in particular Figure 4).
  • a first ramp 24 comes into contact with a first large side of the slot 28 (see FIG. 5), so as to form a first half of the hole T (see figure 6).
  • the ramp 24 partially detaches a chip 34 which remains connected to the wall of the tubular element 12.
  • the ramp 26 partially detaches a chip 36 which remains connected to the wall of the tubular element 12.
  • the ramming stroke of the punch 10 in the wall of the tubular element 12 ends with the setting contact of the calibration part 18 with the edge of the hole T.
  • hole T by forming a slot 28 initial then by shearing of two parts of the wall delimiting the two long sides of the slot 28 by means of the ramps 24, 26 makes it possible to reduce the forces exerted on the tubular element 12 to be drilled and thus to minimize the deformations of this element.
  • the invention makes it possible to form a hole in a metal wall not necessarily delimiting a tubular element, for example a profile wall of open outline.
  • the punch according to the invention makes it possible to form very varied contour holes other than rectangular.
  • Figure 9 a punch 10A, according to a second embodiment of the invention, in which the calibration part 18 has a circular cross section, so that form circular contour holes.
  • chips or knockouts formed when punching a tubular element using the punch according to the invention remain attached to this element tubular, so that the undesirable fall of these chips or knockouts inside the element tubular.
  • the punch according to the invention is simple, of low cost, and allows punching in one operation, by means of this single punch, a wall metallic, without the punching device have to exert a significant force on the punch and without significantly deform the metal wall in the vicinity of the hole formed by the punch.

Abstract

The hole punch has a tip (16) for penetrating the wall of a metal component and a body section (18) for enlarging and shaping it. The tip is basically in the shape of a flat blade with surfaces lying parallel to the lengthwise axis of the punch and edges coming to a point (20). The flat surfaces of the blade are joined to the body (18) of the punch by two sloping surfaces (24, 26) which are inclined in opposite directions and are offset relative to one another along its axis. The body of the punch can have a cross-section which is polygonal, e.g. square, or circular.

Description

La présente invention concerne un poinçon pour la formation d'un trou dans une paroi métallique.The present invention relates to a punch for the formation of a hole in a metal wall.

Elle s'applique en particulier à la formation d'un trou dans une armature tubulaire métallique pour siège de véhicule automobile.It applies in particular to the training of a hole in a metal tubular frame for seat motor vehicle.

Une telle armature est munie habituellement de plusieurs trous destinés par exemple à la fixation d'axes de mécanismes de réglage du siège ou bien à l'accrochage de nappes de suspension pour matelassures de siège.Such a frame is usually provided with several holes intended for example for fixing axes seat adjustment mechanisms or the attachment of suspension plies for seat pads.

Il est connu dans l'état de la technique de former des trous dans une armature tubulaire par poinçonnage de l'armature à froid au moyen d'une presse ou bien d'une machine pneumatique ou hydraulique. On utilise pour cela un poinçon par exemple du type comprenant une partie de pénétration dans la paroi et une partie de calibrage du trou.It is known in the state of the art to form holes in a tubular reinforcement by punching the cold reinforcement by means of a press or a pneumatic or hydraulic machine. We use a punch for example of the type comprising a part of penetration into the wall and a calibration part of the hole.

Le bord d'un trou obtenu par poinçonnage présente une déformation en cuvette qui est d'autant plus prononcée et gênante que le diamètre du trou est important.The edge of a hole obtained by punching presents a deformation in the bowl which is all the more pronounced and annoying that the diameter of the hole is important.

On préfère donc former un trou de grand diamètre dans une armature tubulaire par perçage ou fluoperçage. Cependant, de tels procédés sont relativement coûteux à mettre en oeuvre et ne permettent d'obtenir que des trous de contours circulaires.We therefore prefer to form a large diameter hole in a tubular reinforcement by drilling or fluoperimentation. However, such methods are relatively expensive to implement and allow only holes to be obtained circular contours.

L'invention a notamment pour but de permettre la formation de trous dans des éléments tubulaires métalliques de sections variées, à l'aide de moyens simples permettant de minimiser les déformations de ces éléments tubulaires.The object of the invention is in particular to allow the hole formation in metallic tubular elements of various sections, using simple means allowing to minimize the deformations of these tubular elements.

A cet effet, l'invention a pour objet un poinçon du type précité, caractérisé en ce que la partie de pénétration a une forme générale de lame plane, sensiblement parallèle à un axe longitudinal du poinçon, délimitée par un contour pointu formant un dièdre d'arête sensiblement perpendiculaire à l'axe longitudinal du poinçon, la partie de pénétration étant reliée à la partie de calibrage par une partie de liaison comportant deux rampes d'inclinaisons opposées, la normale en chaque point de chaque rampe étant sensiblement parallèle à un plan parallèle à l'axe longitudinal et à l'arête.To this end, the invention relates to a punch of the aforementioned type, characterized in that the part of penetration has a general shape of a flat blade, substantially parallel to a longitudinal axis of the punch, delimited by a pointed outline forming a corner dihedral substantially perpendicular to the longitudinal axis of the punch, the penetration part being connected to the part calibration by a connecting part comprising two ramps of opposite inclinations, the normal at each point of each ramp being substantially parallel to a plane parallel to the longitudinal axis and to the edge.

Suivant d'autres caractéristiques de ce poinçon :

  • les rampes sont délimitées par des plans obliques sécants suivant une ligne sensiblement orthogonale à l'arête du dièdre ;
  • les rampes sont décalées axialement l'une par rapport à l'autre ;
  • la partie de calibration a une section transversale polygonale, notamment carrée ;
  • la partie de calibration a une section transversale circulaire.
According to other characteristics of this punch:
  • the ramps are delimited by oblique planes intersecting along a line substantially orthogonal to the edge of the dihedral;
  • the ramps are offset axially with respect to each other;
  • the calibration part has a polygonal cross section, in particular square;
  • the calibration part has a circular cross section.

L'invention a également pour objet l'utilisation du poinçon tel que défini ci-dessus pour former un trou dans un élément tubulaire métallique, notamment une armature tubulaire métallique pour siège de véhicule automobile.The invention also relates to the use of the punch as defined above to form a hole in a metallic tubular element, in particular a tubular metal frame for vehicle seat automobile.

L'invention sera mieux comprise à la lecture de la description qui va suivre donnée uniquement à titre d'exemple et faite en se référant aux dessins dans lesquels:

  • la figure 1 est une vue en perspective d'un poinçon selon un premier mode de réalisation de l'invention;
  • les figures 2 à 8 sont des vues en plan du poinçon représenté à la figure 1 montrant des étapes successives de formation d'un trou dans un élément tubulaire, les vues 5 à 8 étant décalées d'un quart de tour autour de l'axe longitudinal du poinçon par rapport aux figures 2 à 4;
  • la figure 9 est une vue similaire à la figure 1 d'un poinçon selon un second mode de réalisation de l'invention.
The invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the drawings in which:
  • Figure 1 is a perspective view of a punch according to a first embodiment of the invention;
  • Figures 2 to 8 are plan views of the punch shown in Figure 1 showing successive steps of forming a hole in a tubular member, views 5 to 8 being offset by a quarter of a turn around the axis longitudinal of the punch relative to Figures 2 to 4;
  • Figure 9 is a view similar to Figure 1 of a punch according to a second embodiment of the invention.

On a représenté sur la figure 1 un poinçon 10 selon un premier mode de réalisation de l'invention, destiné à être monté sur un dispositif de poinçonnage classique.There is shown in Figure 1 a punch 10 according to a first embodiment of the invention, intended to be mounted on a punching device classic.

De façon classique, le poinçon 10 a une forme générale allongée d'axe X.Conventionally, the punch 10 has a shape general elongated X axis.

Le poinçon 10 est destiné à former un trou T notamment dans un élément tubulaire métallique 12 (représenté sur les figures 2 à 8), par exemple un élément d'armature pour siège de véhicule automobile.The punch 10 is intended to form a hole T in particular in a metallic tubular element 12 (shown in Figures 2 to 8), for example an element of armature for motor vehicle seat.

On notera que, dans l'exemple illustré, l'élément tubulaire 12 a une section sensiblement rectangulaire.Note that, in the example illustrated, the element tubular 12 has a substantially rectangular section.

Le poinçon 10 est relié au dispositif de poinçonnage de façon connue en soi, au moyen d'une tête d'accrochage 14.The punch 10 is connected to the device for punching in a manner known per se, by means of a head hanging 14.

Le poinçon 10 comporte une partie 16 de pénétration dans la paroi délimitant l'élément tubulaire 12 et une partie de calibrage du trou T, par exemple de section sensiblement polygonale, notamment carrée, comme cela est illustré sur la figure 1.The punch 10 includes a part 16 of penetration into the wall defining the tubular element 12 and a part for calibrating the hole T, for example of substantially polygonal section, in particular square, as this is illustrated in Figure 1.

La partie de pénétration 16 a une forme générale de lame plane, sensiblement parallèle à l'axe X. Cette partie 16 est délimitée par un contour pointu (en V) formant un dièdre d'arête 20 sensiblement perpendiculaire à l'axe X.The penetration part 16 has a general shape flat blade, substantially parallel to the X axis. part 16 is delimited by a pointed outline (in V) forming an edge dihedral 20 substantially perpendicular to the X axis.

La partie de pénétration 16 est reliée à la partie de calibrage 18 par une partie de liaison 22 comportant deux rampes 24,26 d'inclinaisons opposées. La normale en chaque point de chaque rampe est sensiblement parallèle à un plan parallèle à l'axe longitudinal X et à l'arête 20.The penetration part 16 is connected to the part 18 by a connecting part 22 comprising two ramps 24, 26 of opposite inclinations. Normal in each point of each ramp is substantially parallel to a plane parallel to the longitudinal axis X and to the edge 20.

Dans l'exemple illustré, les rampes 24,26 sont délimitées par des plans obliques sécants suivant une ligne sensiblement orthogonale à l'arête 20 du dièdre.In the example illustrated, the ramps 24, 26 are delimited by intersecting oblique planes following a line substantially orthogonal to the edge 20 of the dihedral.

En variante, les rampes peuvent être délimitées par des portions de cylindres de base circulaire tangentes aux faces de la partie de pénétration 16.Alternatively, the ramps can be delimited by portions of circular base cylinders tangent to the faces of the penetration part 16.

De préférence, les rampes 24,26 sont décalées axialement l'une par rapport à l'autre. Preferably, the ramps 24, 26 are offset axially with respect to each other.

Lors du poinçonnage de l'élément tubulaire 12 pour former le trou T, la lame 16 pénètre dans la paroi de l'élément tubulaire 12, en exerçant un effort relativement faible sur cette paroi, si bien que cette dernière ne subit pas de déformation importante (voir figures 2 à 4).When punching the tubular element 12 to form the hole T, the blade 16 penetrates the wall of the tubular element 12, by exerting a force relatively weak on this wall so that this the latter does not undergo significant deformation (see Figures 2 to 4).

En pénétrant dans la paroi de l'élément tubulaire 12, la lame 16 forme une fente 28 de contour sensiblement rectangulaire. Les petits côtés de la fente 18 sont prolongés par deux copeaux métalliques 30,32, détachés partiellement par la lame 16, reliés à la paroi de l'élément tubulaire 12 (voir notamment figure 4).When entering the wall of the tubular element 12, the blade 16 forms a slot 28 of substantially contour rectangular. The short sides of the slot 18 are extended by two metal shavings 30.32, detached partially by the blade 16, connected to the wall of the tubular element 12 (see in particular Figure 4).

En poursuivant l'enfoncement du poinçon 10 dans la paroi de l'élément tubulaire 12, une première rampe 24 vient en contact avec un premier grand côté de la fente 28 (voir figure 5), de manière à former une première moitié du trou T (voir figure 6).By continuing to press the punch 10 into the wall of the tubular element 12, a first ramp 24 comes into contact with a first large side of the slot 28 (see FIG. 5), so as to form a first half of the hole T (see figure 6).

La rampe 24 détache partiellement un copeau 34 qui reste relié à la paroi de l'élément tubulaire 12.The ramp 24 partially detaches a chip 34 which remains connected to the wall of the tubular element 12.

Puis, l'enfoncement du poinçon 10 se poursuivant toujours, la seconde rampe 26 vient en contact avec le second grand côté de la fente 28 (voir figure 7), de manière à former la seconde moitié du trou T (voir figure 8).Then, the insertion of the punch 10 continues always, the second ramp 26 comes into contact with the second long side of slot 28 (see Figure 7), of so as to form the second half of the hole T (see figure 8).

La rampe 26 détache partiellement un copeau 36 qui reste relié à la paroi de l'élément tubulaire 12.The ramp 26 partially detaches a chip 36 which remains connected to the wall of the tubular element 12.

La course d'enfoncement du poinçon 10 dans la paroi de l'élément tubulaire 12 s'achève par la mise en contact de la partie de calibrage 18 avec le bord du trou T.The ramming stroke of the punch 10 in the wall of the tubular element 12 ends with the setting contact of the calibration part 18 with the edge of the hole T.

La réalisation du trou T par formation d'une fente 28 initiale puis par cisaillement de deux parties de la paroi délimitant les deux grands côtés de la fente 28 au moyen des rampes 24,26 permet de réduire les efforts exercés sur l'élément tubulaire 12 à percer et ainsi de minimiser les déformations de cet élément. The realization of hole T by forming a slot 28 initial then by shearing of two parts of the wall delimiting the two long sides of the slot 28 by means of the ramps 24, 26 makes it possible to reduce the forces exerted on the tubular element 12 to be drilled and thus to minimize the deformations of this element.

On notera que le décalage axial des rampes 24,26 permet de réduire encore plus les efforts appliqués sur la paroi de l'élément tubulaire 12.Note that the axial offset of the ramps 24.26 makes it possible to further reduce the forces applied to the wall of the tubular element 12.

L'invention permet de former un trou dans une paroi métallique ne délimitant pas nécessairement un élément tubulaire, par exemple une paroi de profilé de contour ouvert.The invention makes it possible to form a hole in a metal wall not necessarily delimiting a tubular element, for example a profile wall of open outline.

Le poinçon selon l'invention permet de former des trous de contours très variés autres que rectangulaires.The punch according to the invention makes it possible to form very varied contour holes other than rectangular.

En particulier, on a représenté sur la figure 9 un poinçon 10A, selon un second mode de réalisation de l'invention, dans lequel la partie de calibrage 18 a une section transversale circulaire, de manière à pouvoir former des trous de contours circulaires.In particular, there is shown in Figure 9 a punch 10A, according to a second embodiment of the invention, in which the calibration part 18 has a circular cross section, so that form circular contour holes.

On notera que les copeaux ou débouchures formés lors du poinçonnage d'un élément tubulaire au moyen du poinçon selon l'invention restent accrochés à cet élément tubulaire, si bien que l'on évite la chute indésirable de ces copeaux ou débouchures à l'intérieur de l'élément tubulaire.Note that the chips or knockouts formed when punching a tubular element using the punch according to the invention remain attached to this element tubular, so that the undesirable fall of these chips or knockouts inside the element tubular.

Le poinçon selon l'invention est simple, de faible coût, et permet de poinçonner en une seule opération, au moyen de ce seul poinçon, une paroi métallique, ceci sans que le dispositif de poinçonnage ait à exercer un effort important sur le poinçon et sans déformer notablement la paroi métallique au voisinage du trou formé par le poinçon.The punch according to the invention is simple, of low cost, and allows punching in one operation, by means of this single punch, a wall metallic, without the punching device have to exert a significant force on the punch and without significantly deform the metal wall in the vicinity of the hole formed by the punch.

Claims (6)

Poinçon (10,10A) pour la formation d'un trou (T) dans une paroi métallique (12), du type comprenant une partie (16) de pénétration dans la paroi et une partie (18) de calibrage du trou (T), caractérisé en ce que la partie de pénétration (16) a une forme générale de lame plane, sensiblement parallèle à un axe longitudinal (X) du poinçon, délimitée par un contour pointu formant un dièdre d'arête (20) sensiblement perpendiculaire à l'axe longitudinal (X) du poinçon, la partie de pénétration (16) étant reliée à la partie de calibrage (18) par une partie de liaison (22) comportant deux surfaces formant rampes (24,26) d'inclinaisons opposées, la normale en chaque point de chaque rampe étant sensiblement parallèle à un plan parallèle à l'axe longitudinal (X) et à l'arête (20).Punch (10.10A) for forming a hole (T) in a metal wall (12), of the type comprising a wall penetrating part (16) and a hole calibration part (18) (T), characterized in that the penetrating part (16) has a general shape of flat blade, substantially parallel to a longitudinal axis (X) of the punch, delimited by a pointed outline forming an edge dihedral (20) substantially perpendicular to the longitudinal axis (X) of the punch, the part of penetration (16) being connected to the calibration part (18) by a connecting part (22) comprising two surfaces forming ramps (24, 26) of opposite inclinations, the normal at each point of each ramp being substantially parallel to a plane parallel to the axis longitudinal (X) and at the edge (20). Poinçon selon la revendication 1, caractérisé en ce que les rampes (24,26) sont délimitées par des plans obliques sécants suivant une ligne sensiblement orthogonale à l'arête (20) du dièdre.Punch according to claim 1, characterized in that the ramps (24,26) are delimited by intersecting oblique planes along a line substantially orthogonal to the edge (20) of the dihedral. Poinçon selon la revendication 1 ou 2, caractérisé en ce que les rampes (24,26) sont décalées axialement l'une par rapport à l'autre.Punch according to claim 1 or 2, characterized in that the ramps (24,26) are offset axially with respect to each other. Poinçon selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la partie de calibration (18) a une section transversale polygonale, notamment carrée.Hallmark according to any one of Claims 1 to 3, characterized in that the part of calibration (18) has a polygonal cross section, especially square. Poinçon selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la partie de calibration (18) a une section transversale circulaire.Hallmark according to any one of Claims 1 to 3, characterized in that the part of calibration (18) has a circular cross section. Utilisation du poinçon selon l'une quelconque des revendications précédentes pour former un trou (T) dans un élément tubulaire métallique (12), notamment une armature tubulaire métallique pour siège de véhicule automobile.Use of the punch according to any one of the preceding claims for forming a hole (T) in a metallic tubular element (12), in particular a tubular metal frame for vehicle seat automobile.
EP98400115A 1997-04-16 1998-01-21 Punch for making a hole in a metal plate Ceased EP0872294A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9704696 1997-04-16
FR9704696A FR2762242B1 (en) 1997-04-16 1997-04-16 PUNCH FOR FORMING A HOLE IN A METAL WALL

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EP0872294A1 true EP0872294A1 (en) 1998-10-21

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EP98400115A Ceased EP0872294A1 (en) 1997-04-16 1998-01-21 Punch for making a hole in a metal plate

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FR (1) FR2762242B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8162046B2 (en) 2010-08-17 2012-04-24 T-3 Property Holdings, Inc. Blowout preventer with shearing blades
WO2015021962A1 (en) * 2013-08-13 2015-02-19 Schaeffler Technologies Gmbh & Co. Kg Hydraulic support element
CN110421059A (en) * 2019-07-31 2019-11-08 潍坊东鑫智能科技有限公司 A kind of numerical control character enclosing machine hole punched device
EP3837161A4 (en) * 2018-08-14 2022-09-07 Halkey-Roberts Corporation Large bore pierce pin for an inflator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653664A (en) * 1951-06-27 1953-09-29 Configured Tube Products Compa Method of and means for forming an elongated opening in a pipe or the like
FR2103426A1 (en) * 1970-08-20 1972-04-14 Hudson Leslie
DE2143224A1 (en) * 1971-02-15 1972-08-24 Bocceda, Franco, Mailand (Italien) Device for creating holes in pipes made of copper, brass, plastic, such as polyvinyl chloride, etc., for liquids, air and gases
EP0533574A1 (en) * 1991-09-19 1993-03-24 Valeo Thermique Moteur Method of punching an opening in a tubular wall and tubular wall thus obtained

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653664A (en) * 1951-06-27 1953-09-29 Configured Tube Products Compa Method of and means for forming an elongated opening in a pipe or the like
FR2103426A1 (en) * 1970-08-20 1972-04-14 Hudson Leslie
DE2143224A1 (en) * 1971-02-15 1972-08-24 Bocceda, Franco, Mailand (Italien) Device for creating holes in pipes made of copper, brass, plastic, such as polyvinyl chloride, etc., for liquids, air and gases
EP0533574A1 (en) * 1991-09-19 1993-03-24 Valeo Thermique Moteur Method of punching an opening in a tubular wall and tubular wall thus obtained

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8162046B2 (en) 2010-08-17 2012-04-24 T-3 Property Holdings, Inc. Blowout preventer with shearing blades
US8167031B2 (en) 2010-08-17 2012-05-01 T-3 Property Holdings, Inc. Blowout preventer with shearing blades
US8443879B2 (en) 2010-08-17 2013-05-21 T-3 Property Holdings, Inc. Blowout preventer with shearing blades
US8443880B1 (en) 2010-08-17 2013-05-21 T-3 Property Holdings, Inc. Blowout preventer with shearing blades
WO2015021962A1 (en) * 2013-08-13 2015-02-19 Schaeffler Technologies Gmbh & Co. Kg Hydraulic support element
EP3837161A4 (en) * 2018-08-14 2022-09-07 Halkey-Roberts Corporation Large bore pierce pin for an inflator
CN110421059A (en) * 2019-07-31 2019-11-08 潍坊东鑫智能科技有限公司 A kind of numerical control character enclosing machine hole punched device

Also Published As

Publication number Publication date
FR2762242A1 (en) 1998-10-23
FR2762242B1 (en) 1999-07-16

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