EP3269509B1 - Pliers for punching holes on trapezoidal profiles - Google Patents
Pliers for punching holes on trapezoidal profiles Download PDFInfo
- Publication number
- EP3269509B1 EP3269509B1 EP17180819.9A EP17180819A EP3269509B1 EP 3269509 B1 EP3269509 B1 EP 3269509B1 EP 17180819 A EP17180819 A EP 17180819A EP 3269509 B1 EP3269509 B1 EP 3269509B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- legs
- trapezoidal
- hole punch
- pliers
- 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.)
- Active
Links
- 238000004080 punching Methods 0.000 title description 11
- 238000003825 pressing Methods 0.000 claims description 19
- 239000002184 metal Substances 0.000 description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 238000013138 pruning Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
- B26F1/36—Punching or perforating pliers
-
- 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
- B21D28/002—Drive of the tools
-
- 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
- B21D28/243—Perforating, i.e. punching holes in profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
- B25B7/126—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears with fluid drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/08—Means for actuating the cutting member to effect the cut
- B26D5/086—Electric, magnetic, piezoelectric, electro-magnetic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
- B26F1/34—Hand-held perforating or punching apparatus, e.g. awls power actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
Definitions
- the invention relates to trapezoidal punch pliers with the features of the preamble of claim 1.
- trapezoidal punch pliers are used, with which holes can be punched on the two inclined legs of the trapezoidal profile at the same time, to which, in turn, cable routes, light fittings or cable guides can be attached.
- Such trapezoidal punch pliers must be hand-operated and have a kinematic design similar to that of pruning shears, that is, two articulated pliers legs, each carrying a cutting punch, are relatively short, whereas from the hinge point to the other side, significantly longer lever arms with handles are designed so that the user can apply the forces required for punching.
- the object of the present invention is thus to provide a trapezoidal punch with which the work described can be carried out much more easily.
- the two lever arms on the side of the joint facing away from the two pliers legs are only very short and their inner flanks facing each other are profiled so that they can be coupled with an electric pressing tool for heating and plumbing needs.
- Such pressing tools are known in principle, for example from DE 199 27 776 A1 .
- the pressing tools that can be placed thereon have two pressing legs with which crimp connections can be made from pipe ends or fittings can be attached to one pipe end.
- the punch pliers according to the invention has two pairs of stop surfaces.
- a first pair is referred to as the front stop surfaces and is arranged with a slight offset of the connecting line of the two hinge points on the side of the front ends of the punch pliers legs; the other pair on the opposite Side of the connecting line.
- the opening path of the punch pliers legs is limited by the rear stop surfaces.
- Essential to the invention are, among other things, the length ratio on the punch pliers legs.
- the front ends, which extend between a front tip, which carries the punch, and the bearing pin, are significantly longer than the rear ends of the hole legs on the other side of the bearing pin.
- the length ratio is at least 1.5: 1. This is the only way to achieve a large opening angle that enables the punch to be placed on both sides of the trapezoidal profile at the same time.
- the trapezoidal punch pliers have an adjustable closed position. Depending on which trapezoidal sheets are perforated, grub screws can be inserted into the threaded holes provided.
- the pins can be adjusted by the thread so that they protrude more or less from the stop surface, so that the closing angle of the punch pliers legs is limited depending on the width of the trapezoidal sheet metal.
- the force-controlled press machine switches off when the pins meet. It is also possible to use a threaded pin on one side so that it presses against the opposite stop surface.
- An alternative way of limiting the travel to work is to shorten / limit the travel of the pressure rollers. As soon as the pressure rollers can no longer immerse deeply to close to the holding plate, the jaws can no longer be locked tightly. A mechanical shortening of the path can also be achieved by inserting a screw between the two lower ends of the punch pliers legs. The travel of the pressure rollers is reduced by the height of the screw head.
- the punch pliers according to the invention have, in particular, a defined symmetrical open position in that a centering pin is placed on the central axis between the rear ends of the punch pliers legs lying on the other side of the bearing pin. Together with a corresponding shape, it is achieved that the two punch pliers legs are forced into an orientation that is symmetrical with respect to the central axis.
- the closing is preferably assisted by a compression spring, but for the punching process it takes place predominantly through the force exerted via the pair of rollers of the electric pressing tool.
- the force exerted by the punch on a comparatively thin-walled trapezoidal sheet metal profile must be severely limited. Therefore, only a certain closing path is allowed by the abutting front stop surfaces and a certain distance between the punch pliers legs is always maintained, which is dimensioned so that the trapezoidal sheet profile is not squeezed on its side flanks after the punch has penetrated it.
- the invention is described with reference to the main application, the punching of recesses in a sheet metal profile, for which purpose punches are used on the punch legs.
- punches it is also possible to provide cutting punches in order to be able to make cuts in sheet metal, or riveting punches in order to be able to use rivets.
- the term "punch” therefore includes tool inserts with a different shape.
- each punch pliers leg 10, 20 a punch 50 is arranged on the respective inner flank. This has, for example, an end provided with a thread 51, so that an axial adjustment and thus an adjustment of the penetration depth are possible via nuts 52.
- the two punch pliers legs 10, 20 are connected to one another via a joint unit 30, which is designed identically on the top and bottom.
- a joint base plate 31 is provided there, which has two bearing bores 32.
- a bearing pin 33 is guided through a bore 13, 23 on each punch pliers legs 10, 20.
- the bearing bolts 33 are provided with a threaded hole at both ends so that they can be screwed to the joint base plate 31 via washers 34 and screws 35.
- a compression spring 40 holds the punch pliers legs 10, 20 in the closed position in order to facilitate transport and handling.
- the mounting via two bearing bolts 33 arranged at a distance from one another has the advantage that no overlapping of parts of the punch pliers legs 10, 20 is necessary, so that there is also no weakening due to reduced cross-sections.
- the defined position and the symmetrical movement when closing and opening the two punch pliers legs 10, 20 are achieved by coupling with the electric pressing tool, which moves the two short ends 11, 21 in the same way through its roller drive.
- the inner contour of the punch pliers legs 10, 20 is essential for the function of the trapezoidal punch pliers 100.
- the short ends 11, 21 must be rounded in order to facilitate the entry of the rollers of the pressing tool. Between the ends 11, 21, the contour must taper in the direction of the joint unit 30 in order to define an end region for the extension path of the pair of rollers. Stop surfaces 14 in the area of the joint unit 30 on the one hand and an obliquely outwardly extending contour of the respective long ends 11, 21 of the punch pliers legs 10, 20 are required so that there is a defined closed position in which the ends 12; 12 'and also the punch 50 maintain a distance from one another and do not press against one another.
- the outwardly receding long ends 12, 12 ' can be V-shaped to one another; but they are preferably rounded semi-parabolic on the inside. This results in the advantage that the ends 12, 12 ′ run approximately parallel to one another and the fastening bores for the punch 50 can be made perpendicular to the ends 12.
- FIG. 2 the opened trapezoidal punch pliers 100 is shown in a side view, but without the electrical pressing tool 200 required for use, which is only indicated here by a dash-dotted line.
- the two punch pliers legs 10, 20 enclose a trapezoidal sheet metal profile 300.
- the rollers 201 of the press tool 200 are pressed between the short, rounded legs 11, 21 of the two punch pliers legs 10, 20, whereby we forced a closing movement.
- the closed position is in Fig. 3 shown.
- the punch 50 penetrate the trapezoidal sheet 300. The punching is thus produced.
- the rollers 201 move back again, the two pliers legs 10, 20 can return to their widely spread starting position.
- a second preferred embodiment trapezoidal punch pliers 100 'shown in FIG Fig. 4 is shown in an exploded view, is unchanged in terms of the shape of the punch legs 10, 20.
- a joint unit 30 ' is also formed identically with two parallel joint plates 31' above and below the punch pliers legs 10, 20.
- the trapezoidal punch pliers 100 ′ according to FIG Fig. 4 In the joint unit 30 ', no screw connection of the bearing bolts 33' to the joint base plates 31 'is provided, but an axial fixing of the bearing bolts 33' to the joint base plates 31 via locking rings 34 'placed on the ends.
- the punch pliers legs 10, 20 are held in a closed position by means of a compression spring 40 which is guided in blind holes in the stop surfaces 15.
- the trapezoidal punch pliers 100 also have a locking unit 60' arranged on the central axis for a depth stop 67 '.
- This serves to maintain the desired distance from the underside of the trapezoidal sheet profile 300 and accordingly to carry out the punchings at the intended height of the lateral flanks of the trapezoidal sheet profile 300.
- the depth stop 67 'in the form of an angled wire profile can be inserted into a receptacle of a threaded sleeve 62'.
- the threaded sleeve 62 ' is screwed to the joint base plate 31' via a screw and a lock nut 63 '.
- a further screw element 66' is inserted, which can be easily rotated via a knob 65 '.
- the trapezoidal punch pliers 100 'in the joint unit 30' has a centering pin which is connected to at least one of the base plates 31 'and which has the effect that both punch pliers legs 10, 20 assume a symmetrical open position so that the two punch pliers legs 10, 20 are not misaligned takes place because in this case the punching and pressing punches 50 would start at different heights on the trapezoidal sheet metal profile 300 and could lead to a height offset of the punched recesses.
- Figure 5a shows the trapezoidal punch pliers 100 'according to the second embodiment of the invention in a view from above.
- the tool according to the invention is connected to a pressing tool 200 and is driven via its roller pair 201.
- the centering pin 35 ' is arranged between the two punch pliers legs 10, 20, which is attached to the central, rear bore of the T-shaped base member 31 '.
- Figure 5b is the position of the trapezoidal punch pliers legs 10, 20 opposite Figure 5a unchanged.
- the upper joint base plate 31 ' including the locking unit 60' has been removed in order to be able to better represent the position of the two punch pliers legs 10, 20 in relation to one another and in relation to the centering bolt 35 '.
- the front ends 12, 22 of the punch pliers legs 10, 20 are spread apart, they rest against each other on stop surfaces 15 which are slightly below the horizontal line extending through the two bearing bolts 33 '.
- the maximally splayed position is specified.
- the two punch pliers legs 10, 20 rest with their rear ends 11, 21 on the centering bolt 35 in order to achieve an exactly symmetrical alignment of the two punch pliers legs with respect to the central axis and to avoid tilting to the side.
- the storage area for the two punch pliers legs 10, 20 is shown in FIG Figure 5c shown in an enlarged detail.
- the punch pliers legs 10, 20 lie flat against one another on the stop surfaces 15.
- the centering bolt 35 'lies between the rear ends 11, 21, with some play so that it is ensured in any case that the stop surfaces 15 lie close to one another and no double fit is formed.
- Figure 6a is analogous to Figure 5a the position of the trapezoidal punch pliers 100 'according to the invention in relation to a trapezoidal sheet profile 300, but in this illustration the punch legs 10 20 are maximally closed and the punching and pressing tools 50 have penetrated the lateral profile legs of the trapezoidal sheet profile 300.
- the depth stop 67 ′ also indicates the correct positioning in relation to the trapezoidal sheet metal profile 300 in this position.
- Figure 6c again shows an enlarged view from the area of the mounting of the two punch pliers legs 10, 20.
- the two stop surfaces 15 are no longer in front of each other after the front ends 12, 22 have been moved towards each other and those on the other side of the bearing line between the bearing bolts 33 arranged rear ends 11, 21 have been spread apart.
- the spring 40 holds the closed position of the front legs of the punch pliers legs 10, 20. There is no longer any contact with the centering pin 35 in this position.
- Fig. 7 shows a trapezoidal punch pliers 100 "according to a third embodiment. This corresponds to the other embodiments with regard to the geometry of the trapezoidal punch legs 10", 20 “and their connection via a joint unit 14 etc. The difference is that the trapezoid punch legs 10", 20 “receiving recesses 16 "in the form of through threaded holes.
- FIG Fig. 7 The tool according to the invention is shown in FIG Fig. 7 not connected to a pressing tool 200.
- the position of the trapezoidal punch pliers legs 10 ", 20” is shown in the open position, in which the front ends 12 ", 22" of the punch pliers legs 10 ", 20" are maximally spread apart and the rear stop surfaces 15 "lie against one another.
- the two trapezoidal punch pliers legs 10 ′′, 20 ′′ are provided with threaded pins 17 ′′ as setting elements, which are introduced into the threaded bores 16 ′′ provided for this purpose.
- threaded pins 17 ′′ By turning the threaded pins 17 “, their spacing in relation to the stop surfaces 14" on the inner flanks of the punch pliers legs 10 “, 20” changed and thereby the closing angle can be adjusted so that a profile located between the front ends 11 ', 21 "is not squeezed.
- FIG Fig. 7 A second possibility to limit the dwell angle between the trapezoidal punch pliers legs 10 ′′, 20 ′′ is also shown in FIG Fig. 7 pictured.
- the schematically shown screw 19 ′′ in the rear area prevents any complete rolling in of the pair of rollers 201 (see Fig. Figure 6a ).
- the trapezoidal punch pliers legs 10 ′′, 20 ′′ cannot reach their maximum closed position, which is so desired with wider trapezoidal sheets.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Scissors And Nippers (AREA)
Description
Die Erfindung betrifft eine Trapezlochzange mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to trapezoidal punch pliers with the features of the preamble of claim 1.
Zur Befestigung von Installationen an einer aus Trapezblechprofilen gebildeten Deckenkonstruktion werden Trapezlochzangen eingesetzt, mit denen gleichzeitig an den beiden schrägen Schenkeln des Trapezprofils Löcher eingestanzt werden können, an denen wiederum Kabeltrassen, Leuchtkörper oder Leitungsführungen befestigbar sind. Eine solche Trapezlochzange muss handbetätigt werden und besitzt eine ähnliche kinematische Ausbildung wie eine Astschere, das heißt, zwei gelenkig miteinander verbundene Zangenschenkel, die jeweils einen Schneidstempel tragen, sind relativ kurz ausgebildet, wohingegen von dem Gelenkpunkt ausgehend zur anderen Seite hin wesentlich längere Hebelarme mit Handgriffen ausgebildet sind, damit der Benutzer die zum Stanzen erforderlichen Kräfte aufbringen kann.To attach installations to a ceiling structure made of trapezoidal sheet metal profiles, trapezoidal punch pliers are used, with which holes can be punched on the two inclined legs of the trapezoidal profile at the same time, to which, in turn, cable routes, light fittings or cable guides can be attached. Such trapezoidal punch pliers must be hand-operated and have a kinematic design similar to that of pruning shears, that is, two articulated pliers legs, each carrying a cutting punch, are relatively short, whereas from the hinge point to the other side, significantly longer lever arms with handles are designed so that the user can apply the forces required for punching.
Die Arbeit mit einer Trapezlochzange ist sehr kräftezehrend und ermüdend, da in der Regel nicht nur wenige einzelne Ausstanzungen hergestellt werden müssen, sondern mehrere Reihen entlang größerer Längenabschnitte von Trapezblechen. Die Arbeiten müssen über Kopf ausgeführt werden und bedingt durch die lange Hebellänge muss der Benutzer aus einer weit abgespreizten Stellung der Hebel drücken.Working with trapezoidal punch pliers is very exhausting and tiring, since as a rule not only a few individual punchings have to be made, but several rows along larger length sections of trapezoidal sheets. The work must be carried out overhead and, due to the long lever length, the user has to press the lever from a widely spread position.
Die Aufgabe der vorliegenden Erfindung besteht somit darin, eine Trapezlochzange anzugeben, mit welcher die beschriebenen Arbeiten wesentlich einfacher ausführbar sind.The object of the present invention is thus to provide a trapezoidal punch with which the work described can be carried out much more easily.
Diese Aufgabe wird durch eine Trapezlochzange mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a trapezoidal punch with the features of claim 1.
Hierbei werden die beiden Hebelarme an der von den beiden Zangenschenkeln wegweisenden Seite des Gelenks nur sehr kurz ausgebildet und an ihren zueinander weisenden Innenflanken mit einer Profilierung ausgebildet, sodass sie mit einem elektrischen Presswerkzeug für den Heizungs- und Sanitärinstallationsbedarf koppelbar sind.Here, the two lever arms on the side of the joint facing away from the two pliers legs are only very short and their inner flanks facing each other are profiled so that they can be coupled with an electric pressing tool for heating and plumbing needs.
Solche Presswerkzeuge sind grundsätzlich bekannt, beispielsweise aus der
Durch die nach der Erfindung entfallenden langen Hebel, die für eine Handbetätigung einer Lochzange benötigt werden, und durch die Ansatzmöglichkeit eines elektrischen Presswerkzeugs ist eine wesentlich erleichterte Herstellung von Stanzungen an einem Trapezblech möglich. Auch wenn das Gesamtgewicht der Einheit aus einer erfindungsgemäß ausgebildeten Trapezlochzange und einem damit koppelbaren elektrischen Presswerkzeug nicht geringer ist als das Gewicht des bekannten Handwerkzeugs, so ist doch die Arbeitsweise wesentlich ergonomischer. Die Werkzeugeinheit muss lediglich an die zu bearbeitende Stelle geführt und dort gehalten werden. Die Führung der Werkzeugeinheit kann wesentlich näher am Körper erfolgen. Es ist nicht mehr notwendig, weit ausladende Bewegungen mit den Armen auszuführen und auch die zum Stanzen erforderlichen, erheblichen Kräfte müssen nicht mehr durch Muskelkraft aufgebracht werden. Aufgrund der weiten Verbreitung der Rohrpresswerkzeuge ist die erfindungsgemäße Trapezlochzange auch kostengünstig einsetzbar, da die elektrische Antriebseinheit des Presswerkzeugs entweder in den Handwerksbetrieben bereits vorhanden ist oder in verschiedenen Varianten am Markt verfügbar ist.Due to the long levers that are no longer required according to the invention, which are required for manual operation of punch pliers, and the possibility of using an electric pressing tool, it is possible to make punchings on a trapezoidal sheet much easier. Even if the total weight of the unit consisting of trapezoidal punch pliers designed according to the invention and an electric pressing tool that can be coupled therewith is not less than the weight of the known hand tool, the mode of operation is much more ergonomic. The tool unit only has to be guided to the point to be machined and held there. The tool unit can be guided much closer to the body. It is no longer necessary to carry out sweeping movements with the arms and the considerable forces required for punching no longer have to be exerted by muscle power. Due to the widespread use of pipe pressing tools, the trapezoidal punch pliers according to the invention can also be used cost-effectively, since the electric drive unit of the pressing tool is either already available in the craft businesses or is available on the market in various variants.
Die erfindungsgemäße Lochzange besitzt zwei Paare von Anschlagflächen. Ein erstes Paar wird als vordere Anschlagflächen bezeichnet und ist mit etwas Versatz der Verbindungslinie der beiden Gelenkpunkte auf der Seite der vorderen Enden der Lochzangenschenkel angeordnet; das andere Paar auf der gegenüberliegenden Seite der Verbindungslinie. Durch die hinteren Anschlagflächen wird der Öffnungsweg der Lochzangenschenkel begrenzt.The punch pliers according to the invention has two pairs of stop surfaces. A first pair is referred to as the front stop surfaces and is arranged with a slight offset of the connecting line of the two hinge points on the side of the front ends of the punch pliers legs; the other pair on the opposite Side of the connecting line. The opening path of the punch pliers legs is limited by the rear stop surfaces.
Erfindungswesentlich sind u.a. die Längenverhältnis an den Lochzangenschenkeln . Die vorderen Enden, die sich zwischen einer vorderen Spitze, die die Lochstempel trägt, und den Lagerbolzen erstrecken, sind deutlich länger alsi die hinteren Enden der Lochschenkeln jenseits der Lagerbolzen. Das Längenverhältnis ist mindestens 1,5 : 1. Nur so wird ein großer Öffnungswinkel ermöglicht, der es ermöglicht, an beiden Seiten des Trapezprofils zugleich die Lochstempel anzusetzen.Essential to the invention are, among other things, the length ratio on the punch pliers legs. The front ends, which extend between a front tip, which carries the punch, and the bearing pin, are significantly longer than the rear ends of the hole legs on the other side of the bearing pin. The length ratio is at least 1.5: 1. This is the only way to achieve a large opening angle that enables the punch to be placed on both sides of the trapezoidal profile at the same time.
Kommen Trapezprofile mit unterschiedlichen Breiten zum Einsatz, verfügt die Trapezlochzange über eine anpassbare Schließstellung. Je nachdem, welche Trapezbleche gelocht werden, können Gewindestifte in dafür vorgesehene Gewindebohrungen eingefügt werden. Die Stifte können durch das Gewinde so eingestellt werden, dass sie mehr oder weniger aus der Anschlagfläche herausragen, so dass in Abhängigkeit zur Trapezblechbreite der Schließwinkel der Lochzangenschenkel begrenzt wird. Die kraftgesteuerte Pressmaschine schaltet beim Aufeinandertreffen der Stifte ab. Möglich ist auch die einseitige Verwendung eines Gewindestiftes, sodass dieser gegen die gegenüberliegende Anschlagfläche drückt.If trapezoidal profiles with different widths are used, the trapezoidal punch pliers have an adjustable closed position. Depending on which trapezoidal sheets are perforated, grub screws can be inserted into the threaded holes provided. The pins can be adjusted by the thread so that they protrude more or less from the stop surface, so that the closing angle of the punch pliers legs is limited depending on the width of the trapezoidal sheet metal. The force-controlled press machine switches off when the pins meet. It is also possible to use a threaded pin on one side so that it presses against the opposite stop surface.
Eine alternative Möglichkeit, um den Arbeitsweg zu begrenzen, liegt darin, den Weg der Druckrollen zu verkürzen/limitieren. Sobald die Druckrollen nicht mehr tief bis nah an die Halteplatte eintauchen können, ist auch eine enge Zuhaltung der Backen nicht mehr möglich. Eine mechanische Wegverkürzung kann auch durch das Einbringen einer Schraube zwischen den beiden unteren Enden der Lochzangenschenkel erreicht werden. Der Weg der Druckrollen wird um die Höhe des Schraubenkopfes verringert.An alternative way of limiting the travel to work is to shorten / limit the travel of the pressure rollers. As soon as the pressure rollers can no longer immerse deeply to close to the holding plate, the jaws can no longer be locked tightly. A mechanical shortening of the path can also be achieved by inserting a screw between the two lower ends of the punch pliers legs. The travel of the pressure rollers is reduced by the height of the screw head.
Die Lochzange nach der Erfindung besitzt insbesondere dadurch eine definierte symmetrische Öffnungsstellung, dass zwischen den jenseits der Lagerbolzen liegenden, hinteren Enden der Lochzangenschenkel ein Zentrierbolzen auf der Mittelachse platziert ist. Zusammen mit einer entsprechenden Formgebung wird erreicht, dass die beiden Lochzangenschenkel in eine in Bezug auf die Mittelachse symmetrische Ausrichtung gezwungen werden.The punch pliers according to the invention have, in particular, a defined symmetrical open position in that a centering pin is placed on the central axis between the rear ends of the punch pliers legs lying on the other side of the bearing pin. Together with a corresponding shape, it is achieved that the two punch pliers legs are forced into an orientation that is symmetrical with respect to the central axis.
Die Schließung wird vorzugsweise durch eine Druckfeder unterstützt, erfolgt aber für den Stanzvorgang überwiegend durch die über das Rollenpaar des elektrischen Presswerkzeugs ausgebübte Kraft. Anders als beim Pressen von sanitären Fittings und Rohrverbindungen muss aber die Kraft, die von der Lochzange auf ein vergleichsweise dünnwandiges Trapezblechprofil einwirkt, stark begrenzt werden. Daher wird durch die aneinander anliegenden vorderen Anschlagflächen nur eine bestimmter Schließweg zugelassen und ein bestimmter Abstand der Lochzangenschenkel zueinander stets gewahrt, der so bemessen ist, dass das Trapezblechprofil nicht an seinen seitlichen Flanken gequetscht wird, nachdem die Lochstempel darin eingedrungen sind.The closing is preferably assisted by a compression spring, but for the punching process it takes place predominantly through the force exerted via the pair of rollers of the electric pressing tool. In contrast to the pressing of sanitary fittings and pipe connections, however, the force exerted by the punch on a comparatively thin-walled trapezoidal sheet metal profile must be severely limited. Therefore, only a certain closing path is allowed by the abutting front stop surfaces and a certain distance between the punch pliers legs is always maintained, which is dimensioned so that the trapezoidal sheet profile is not squeezed on its side flanks after the punch has penetrated it.
Die Erfindung wird anhand des Hauptanwendungszwecks, des Stanzens von Ausnehmungen in einem Blechprofil beschrieben, wozu Lochstempel an den Lochzangenschenkeln eingesetzt werden. Möglich ist aber auch, Schneidstempel vorzusehen, um Einschnitte in Blech einbringen zu können, oder Nietstempel, um Nieten einsetzen zu können. Die Bezeichnung "Lochstempel" schließt daher andersartig geformte Werkzeugeinsätze ein.The invention is described with reference to the main application, the punching of recesses in a sheet metal profile, for which purpose punches are used on the punch legs. However, it is also possible to provide cutting punches in order to be able to make cuts in sheet metal, or riveting punches in order to be able to use rivets. The term "punch" therefore includes tool inserts with a different shape.
Die Erfindung wird nachfolgend mit Bezug auf die in den Zeichnungen dargestellten Ausführungsbeispiele näher erläutert. Die Figuren zeigen im Einzelnen:
- Fig. 1
- eine erfindungsgemäße Trapezlochzange gemäß einer ersten Ausführungsform in perspektivischer Explosionsdarstellung;
- Fig. 2
- die Trapezlochzange in seitlicher Ansicht in geöffneter Stellung;
- Fig. 3
- die Trapezlochzange in seitlicher Ansicht in geschlossener Stellung;
- Fig. 4
- eine erfindungsgemäße Trapezlochzange gemäß einer zweiten Ausführungsform in perspektivischer Explosionsdarstellung;
- Fig. 5a
- die Trapezlochzange nach
Fig. 4 in seitlicher Ansicht in geöffneter Stellung; - Fig. 5b
- Teile der Trapezlochzange nach
Fig. 4 in seitlicher Ansicht in geöffneter Stellung; - Fig. 5c
- ein Detail aus
Fig. 5b ; - Fig. 6a
- die Trapezlochzange nach
Fig. 4 in seitlicher Ansicht in geschlossener Stellung; - Fig. 6b
- Teile der Trapezlochzange nach
Fig. 4 in seitlicher Ansicht in geschlossener Stellung; - Fig. 6c
- ein Detail aus
Fig. 6b und - Fig. 7
- eine erfindungsgemäße Trapezlochzange gemäß einer dritten Ausführungsform mit variablem Anschlag.
- Fig. 1
- a trapezoidal punch pliers according to the invention according to a first embodiment in a perspective exploded view;
- Fig. 2
- the trapezoidal punch pliers in a side view in the open position;
- Fig. 3
- the trapezoidal punch pliers in a side view in the closed position;
- Fig. 4
- a trapezoidal punch pliers according to the invention according to a second embodiment in a perspective exploded view;
- Figure 5a
- the trapezoidal punch
Fig. 4 in side view in open position; - Figure 5b
- Parts of the trapezoidal punch pliers
Fig. 4 in side view in open position; - Figure 5c
- a detail
Figure 5b ; - Figure 6a
- the trapezoidal punch
Fig. 4 in side view in closed position; - Figure 6b
- Parts of the trapezoidal punch pliers
Fig. 4 in side view in closed position; - Figure 6c
- a detail
Figure 6b and - Fig. 7
- a trapezoidal punch pliers according to the invention according to a third embodiment with a variable stop.
- zwei spiegelbildlich zueinander ausgebildete Lochzangenschenkel 10, 20;
zwei Lochstempel 50 undeine Gelenkeinheit 30.
- two
10, 20 which are designed to be mirror images of one another;hole pliers legs - two
punches 50 and - a
hinge unit 30.
Im Endbereich jedes Lochzangenschenkels 10, 20 ist an der jeweiligen Innenflanke ein Lochstempel 50 angeordnet. Dieser besitzt beispielsweise ein mit einem Gewinde 51 versehenes Ende, sodass über Muttern 52 eine axiale Verstellung und damit eine Verstellung der Eindringtiefe möglich sind.In the end region of each punch
Die beiden Lochzangenschenkel 10, 20 sind über eine Gelenkeinheit 30 miteinander verbunden, welche an der Ober- und Unterseite gleichartig ausgebildet ist. Dort ist jeweils eine Gelenkbasisplatte 31 vorgesehen, die zwei Lagerbohrungen 32 aufweist. Durch eine Bohrung 13, 23 an jedem Lochzangenschenkel 10, 20 ist ein Lagerbolzen 33 geführt. Die Lagerbolzen 33 sind an beiden Enden mit einer Gewindebohrung versehen, sodass sie über Unterlegscheiben 34 und Schrauben 35 mit der Gelenkbasisplatte 31 verschraubbar sind.The two
Eine Druckfeder 40 hält die Lochzangenschenkel 10, 20 in der Schließstellung, um Transport und Handhabung zu erleichtern.A
Die Lagerung über zwei mit Abstand zueinander angeordnete Lagerbolzen 33 hat den Vorteil, dass keine Überlappung von Teilen der Lochzangenschenkel 10, 20 erforderlich ist, so dass auch keine Schwächung durch reduzierte Querschnitte vorliegt. Die definierte Stellung und die symmetrische Bewegung beim Schließen und Öffnen der beiden Lochzangenschenkel 10, 20 werden dadurch erreicht, dass die Kopplung mit dem elektrischen Presswerkzeug erfolgt, welches durch seinen Rollenantrieb die beiden kurzen Enden 11, 21 gleichartig bewegt.The mounting via two bearing
Die Innenkontur der Lochzangenschenkel 10, 20 ist wesentlich für die Funktion der Trapezlochzange 100. Die kurzen Enden 11, 21 müssen gerundet ausgebildet sein, um den Einlauf der Rollen des Presswerkzeugs zu erleichtern. Zwischen den Enden 11, 21 muss sich die Kontur in Richtung der Gelenkeinheit 30 verjüngen, um einen Endbereich für den Ausfahrweg des Rollenpaars zu definieren. Anschlagflächen 14 im Bereich der Gelenkeinheit 30 einerseits und eine schräg nach außen verlaufende Kontur der jeweiligen langen Enden 11, 21 der Lochzangenschenkel 10, 20 sind erforderlich, damit es eine definierte Schließstellung gibt, in der die Enden 12; 12' und auch die Lochstempel 50 einen Abstand zueinander wahren und nicht gegeneinander drücken. Dieser Abstand muss auf das zu bearbeitende Trapezprofil angepasst werden, so dass das Profil nur gestanzt, aber nicht zerquetscht wird. Die nach außen fliehenden langen Enden 12, 12' können V-förmig zueinander ausgebildet sein; sie sind aber vorzugsweise an der Innenseite halbparabelförmig gerundet. Hierdurch ergibt sich der Vorteil, dass die den Enden 12, 12' annähernd parallel zueinander verlaufen und die Befestigungsbohrungen für die Lochstempel 50 senkrecht zu den Enden 12 eingebracht werden können.The inner contour of the
In
Die beiden Lochzangenschenkel 10, 20 umschließen ein Trapezblechprofil 300. Durch Betätigung des Presswerkzeugs 200, auf das die Trapezlochzange 100 aufgesetzt ist, werden die Rollen 201 des Presswerkzeugs 200 zwischen die kurzen, gerundeten Schenkel 11, 21 der beiden Lochzangenschenkel 10, 20 gedrückt, wodurch eine Schließbewegung erzwungen wir.The two
Die Schließstellung ist in
Eine zweite bevorzugte Ausführungsform eine Trapezlochzange 100', die in
Weiterhin besitzt die Trapezlochzange 100' zusätzlich eine auf der Mittelachse angeordnete Arretiereinheit 60' für einen Tiefenanschlag 67'. Dieser dient dazu, den gewünschten Abstand von der Unterseite des Trapezblechprofils 300 einzuhalten und dementsprechend die Stanzungen auf der vorgesehenen Höhe der seitlichen Flanken des Trapezblechprofils 300 durchzuführen. Der Tiefenanschlag 67' in Form eines abgewinkelten Drahtprofils ist in eine Aufnahme einer Gewindemuffe 62' einsetzbar. Die Gewindemuffe 62' ist über eine Schraube und einer Kontermutter 63' mit der Gelenkbasisplatte 31' verschraubt. Am anderen Ende der Gewindemuffe 62' ist ein weiteres Schraubelement 66' eingesetzt, das über einen Knauf 65' einfach verdreht werden kann. Wenn der Gewindeschaft des Schraubelements 66' auf das eingesteckte Tiefenanschlagelement 67' trifft, wird dieses festgeklemmt und die eingestellte Anschlagtiefe wird fixiert.Furthermore, the trapezoidal punch pliers 100 'additionally have a locking unit 60' arranged on the central axis for a depth stop 67 '. This serves to maintain the desired distance from the underside of the
Außerdem weist die Trapezlochzange 100' in der Gelenkeinheit 30' einen Zentrierzapfen vor, der mit wenigstens einer der Basisplatten 31' verbunden ist und der bewirkt, dass beide Lochzangenschenkel 10, 20 eine symmetrische Öffnungsstellung einnehmen, so dass keine Schiefstellung der beiden Lochzangenschenkel 10, 20 erfolgt, weil in diesem Falle die Loch- und Pressstempel 50 auf unterschiedlicher Höhe am Trapezblechprofil 300 ansetzen würden und zu einem Höhenversatz der eingestanzten Ausnehmungen führen könnte.In addition, the trapezoidal punch pliers 100 'in the joint unit 30' has a centering pin which is connected to at least one of the base plates 31 'and which has the effect that both punch
In der in
In
Der Bereich der Lagerung der beiden Lochzangenschenkel 10, 20 ist in
In
In
Das erfindungsgemäße Werkzeug ist in der Darstellung der
Bei der Trapezlochzange 100" sind gleich zwei Einrichtungen vorgesehen, um den Anschlagspunkt der Lochzangenschenkel 10", 20" zu verändern und darüber den Schließwinkel und den Freiraum zwischen deren vorderen Enden 11", 21" einstellen zu können.In the
Zu einen sind die beiden Trapezlochzangenschenkel 10", 20" mit Gewindestiften 17" als Einstellelemente versehen, die in die dafür vorgesehenen Gewindebohrungen 16" eingebracht sind. Durch Drehen der Gewindestifte 17" kann ihr Abstand in Bezug auf die Anschlagflächen 14" an den Innenflanken der Lochzangenschenkel 10", 20" verändert und dadurch der Schließwinkel so eingestellt werden, dass ein zwischen den vorderen Enden 11', 21" befindliches Profil nicht gequetscht wird.On the one hand, the two trapezoidal
Eine zweite Möglichkeit, um den Schließwinkel zwischen den Trapezlochzangenschenkeln 10", 20" zu begrenzen, ist ebenfalls in
Claims (11)
- Trapezoidal piercing pliers (100; 100'), at least comprising two pliers legs (10, 20; 10", 20") arranged mirror-inverted to each other, each with a piercing punch (50; 50"), as well as a joint unit (30; 30') for connecting the two piercing pliers legs (10, 20; 10", 20"),
characterized by,- that the ends (11; 21) of the piercer legs (10, 20; 10", 20") facing away from the front ends (12; 22) with the piercing punches (50; 50") are designed for connection to a double roller feed fork of an electric pressing tool (200);- that the punch legs (10, 20; 10", 20") have front stop surfaces (14) at the front ends (12, 22; 12", 22") in the region of the joint unit (30), which stop surfaces (14) abut against each other in the closed position, wherein a distance is maintained between the front ends (12; 22) of the punch legs (10, 20; 10", 20") and between the punches (50; 50"). - Trapezoidal hole punch (100; 100'; 100") according to claim 1, characterized in that the hole punch legs (10, 20; 10", 20") have rear stop surfaces (15) in the region of the joint unit (30) at the rear ends (11, 21; 11", 21"), the hole punch legs (10, 20; 10", 20") abutting one another in the open position at the rear stop surfaces (15).
- Trapezoidal punch (100; 100'; 100") according to claim 1 or 2, characterized in that the rear ends (11, 21; 11", 21") of the punch legs (10; 20) each have a semi-parabolic inner contour extending from the rear stop surfaces (15).
- Trapezoidal hole punch (100; 100'; 100") according to any one of claims 1 to 3, characterized in that the joint unit (30; 30') comprises two bearing pins (33; 33') fixed between two joint base plates (31).
- Trapezoidal hole punch (100; 100'; 100") according to one of claims 1 to 4, characterized in that a centering pin (35) is arranged on the central axis, between the rear ends (11, 21; 11", 21") of the trapezoidal hole punch legs (10, 20; 10", 20").
- Trapezoidal hole punch (100; 100'; 100") according to claim 5, characterized in that the centering pin (35) is arranged between the joint base plates (31) and is connected to at least one of the joint base plates (31).
- Trapezoidal hole punch (100') according to any one of claims 1 to 6, characterized by a locking unit (60') which is connected to one of the joint base plates (31) and in which an adjustable depth stop element (67') can be inserted.
- Trapezoidal punch (100; 100'; 100") according to any one of claims 1 to 7, characterized in that the piercing punches (50; 50") are detachably connected to the front ends (12, 22; 12", 22") of the trapezoidal punch legs (10, 20; 10", 20").
- Trapezoidal hole punch (100; 100'; 100") according to claim 8, characterized in that the distance of the front edge of the hole punches (50; 50") with respect to the front ends (12, 22; 12", 22") is adjustable.
- Trapezoidal hole punch (100") according to at least one of the preceding claims, characterized in that in at least one hole punch leg (10", 20") there is arranged in each case at least one adjusting element (17") which is adjustable transversely to the longitudinal extent of the hole punch legs (10", 20") and which projects into the intermediate space formed between the hole punch legs (10", 20").
- Trapezoidal hole punch (100") according to at least one of the preceding claims, characterized in that an adjusting element (17") is provided on each of the two hole punch legs (10", 20"), and in that the hole punch legs (10", 20") have two receiving recesses (16"), arranged in mirror image with respect to a longitudinal axis, for the adjusting elements (17").
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DE202016103737.9U DE202016103737U1 (en) | 2016-07-12 | 2016-07-12 | Trapezoidal punch |
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CN113580825B (en) * | 2021-08-02 | 2023-06-06 | 南宁市自然资源信息集团有限公司 | Marking pliers for forest investigation and use method |
CN113547018A (en) * | 2021-09-01 | 2021-10-26 | 桂林福达阿尔芬大型曲轴有限公司 | Drilling device for detecting crank arm difference |
DE202021105317U1 (en) | 2021-10-01 | 2022-01-11 | H3 Tools GmbH & Co. KG | Hole punch for trapezoidal punch pliers |
HU5561U (en) * | 2022-06-22 | 2023-02-28 | Tamas Hajba | Tool for perforating trapezoidal plates |
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US4571975A (en) * | 1984-03-29 | 1986-02-25 | Pawloski James A | Fluid actuated tool |
DE19927776B4 (en) | 1999-06-17 | 2012-08-30 | REMS-WERK Christian Föll und Söhne GmbH & Co. | press tool |
DE102011052350A1 (en) * | 2011-08-02 | 2013-02-07 | Gustav Klauke Gmbh | Pair of jaws for punching out holes |
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