EP2512743B1 - Clamping device for rod-shaped profiled elements - Google Patents

Clamping device for rod-shaped profiled elements Download PDF

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Publication number
EP2512743B1
EP2512743B1 EP10805401.6A EP10805401A EP2512743B1 EP 2512743 B1 EP2512743 B1 EP 2512743B1 EP 10805401 A EP10805401 A EP 10805401A EP 2512743 B1 EP2512743 B1 EP 2512743B1
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EP
European Patent Office
Prior art keywords
clamping
central axis
clamping device
rod
clamped
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EP10805401.6A
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German (de)
French (fr)
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EP2512743A1 (en
Inventor
Ulrich Rattunde
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Rattunde AG
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Rattunde AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00Vices
    • B25B1/20Vices for clamping work of special profile, e.g. pipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00Vices
    • B25B1/24Details, e.g. jaws of special shape, slideways
    • B25B1/2405Construction of the jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00Vices
    • B25B1/24Details, e.g. jaws of special shape, slideways
    • B25B1/2405Construction of the jaws
    • B25B1/241Construction of the jaws characterised by surface features or material
    • B25B1/2415Construction of the jaws characterised by surface features or material being composed of a plurality of parts adapting to the shape of the workpiece
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/14Clamps for work of special profile
    • B25B5/147Clamps for work of special profile for pipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/16Details, e.g. jaws, jaw attachments
    • B25B5/163Jaws or jaw attachments

Definitions

  • the invention relates to a tensioning device for rod-shaped profiles with a substantially circular cross-section according to the preamble of claim 1.
  • Clamping devices for pipes as a special embodiment of a rod-shaped profile, are known in the art.
  • the clamping devices on two spaced Zentrischspanner The two centric clamps comprise the tube in a clamping position in the region of the tube ends. Pipe ends of the clamped in the clamping position tube can be supplied for further processing.
  • the pipe ends are, for example, chamfered, deburred, brushed, etc.
  • the problem with the known clamping devices is the insufficient position exactness of the clamped pipe. That is, due to multiple external circumstances such as temperature, material change, etc. deviates the desired central axis of the clamping device of the pipe center axis of the clamped pipe usually something. The deviations may be minimal, i.
  • a clamping device is provided by means of a pipe or milling machine at the end of a pipe is attachable.
  • the clamping device does not allow the readjustment of the applied milling tool relative to the pipe section.
  • JP 631564 From the JP 631564 is a clamping device with two mutually movable clamping jaws, which are suitable for clamping long profiles.
  • the invention makes use of the idea that to reduce when adjusting a rod-shaped profile in a clamping device over time adjusting or from the outset existing offset between the desired central axis and profile central axis by an adjusting device.
  • rod-shaped profile are understood here, inter alia, tubes and solid profiles.
  • the clamping device preferably has two Zentrischspanner. But it is also a training with an arbitrarily higher number of Zentrischspannern possible.
  • the profiles are in a cross section transverse to its longitudinal direction substantially circular, preferably formed exactly circular. Conveniently, the profiles are substantially along their entire length, preferably exactly circular in cross-section. The cross section is conveniently arranged perpendicular to the longitudinal axis.
  • the profiles rest on supports of the centric clamps.
  • the adjustment is done by changing the shape of the pads.
  • Each of the centric clamps preferably has exactly two centrically movable clamping jaws.
  • Each of the Zentrischspanner can have three, four or even an arbitrarily higher number of clamping jaws.
  • the Zentrischspanner allows the exact approach to each other and each other driving away the jaws of opposing jaws in a traversing plane.
  • each of the jaws on exactly one edition.
  • at least one of the pads is divided into two or a more arbitrary higher number of partial pads.
  • the pads are preferably formed prismatic.
  • each of the clamping jaws in each case has a prismatically shaped support, wherein each of the prismatic supports has two straight bearing surfaces running in a longitudinal direction of the clamped tube, which are perpendicular to one another.
  • each of the clamping jaws has at least three gaps.
  • the gaps of a clamping jaw preferably extend in the longitudinal direction in each case over the entire length of the clamping jaw and thus each form a deformable tongue between them.
  • the deformable tongue is conveniently formed in the clamping jaw so that it forms a partial support on the opposite clamping jaw facing outer wall.
  • each of the jaws on exactly three, an upper, a lower and a middle gap, which form between them exactly two juxtaposed deformable tongues, which are separated by the middle gap.
  • Each of the clamping jaws may be formed in one piece, in particular the tongues and the associated clamping jaw frame may be in one piece.
  • the clamping jaw can be manufactured with high precision in the EDM process
  • the shape of the preferably prismatic support is slightly changed.
  • the changes are made such that the opposing and cooperating jaws of a Zentrischspanners be changed such that the desired central axis and the profile central axis coincide after adjustment.
  • the adjusting device comprises at least one adjustable width adjustable spacer member.
  • the spacer member may be inserted in an associated gap and abut or penetrate the gap walls.
  • the gap width is variable.
  • the gap width can also be adjusted by the width of the spacer component, that is, the gap width is maintained in the width set by the spacer component for the at least next processing step. You can then make new settings below.
  • each of the jaws on exactly three column and spacer components are embedded in the next but one column.
  • embodiments are also disclosed which have clamping jaws of any number of columns, in particular four or more columns.
  • Spacer members are preferably recessed in each of the slots or in only selected slots.
  • a profile machining of the clamped profile is preferably carried out.
  • This profile ends such as pipe ends can be provided with a chamfer. If the pipe central axis does not coincide with the desired central axis of the clamping device, the subsequent profile end machining leads to an eccentricity, which can be measured by a separate measuring device. The size and location of the measured eccentricity is used to make a corresponding readjustment by means of the adjusting device. Conveniently, a correlation table is created in advance, which makes it possible, depending on the measured eccentricity to immediately determine an adjustment of the adjustment, which leads to an at least significant reduction in the offset of the two central axes.
  • the spacer components are designed as piezo elements or other, preferably wedge-shaped components. Mixed forms of the spacer components are also possible or the use of different spacer components in the same clamping device.
  • the tensioning device according to the invention may be a component of a profile cutting machine. It is preferably provided in the processing gear for a sawing tool. From the sawing tool, the cut-to-length profile can be inserted there by means of a gripping arm in the release position of the clamping device and then clamped there. In the clamping position, the high-precision post-processing is carried out as described above. The clamping device is then transferred back to the release position and removed the processed profile by means of a preferably other gripping arm.
  • Fig. 1 shows a clamping device according to the invention with a front 1 and a rear 2 in a longitudinal direction L spaced from each other Zentrischspanner between which a pipe 3 is clamped.
  • the terms 'front', 'rear', 'top', 'bottom', 'left' and 'right' refer to the positions of the respective components relative to the tensioning device as shown in the figures. However, all other layers of the tensioning device are also disclosed.
  • Each of the two centric clamps 1, 2 has two clamping jaws 6, 7 which can be moved centrally relative to each other. The plane traversed by the two clamping jaws 6, 7 of the respective centric clamp 1, 2 forms a traversing plane.
  • tube 3 has a tube center axis R, and the two Zentrischspanner 1, 2 have a desired central axis S, which extends centrally through the two Zentrischspanner 1, 2.
  • the tube 3 is clamped in the two Zentrischspannern 1, 2.
  • the clamping device is therefore in a clamping position.
  • Pipe ends of the clamped in the two centric clamps 1, 2 pipe 3 are in the clamping position a piece over the jaws 6, 7, 11, 12 of the centric clamp 1, 2 also off.
  • the free pipe ends can in the clamping position thus processing in Be subjected to brushing, deburring and / or chamfering by means of a (not shown) tool head.
  • the tool head is guided for machining from the outside to the free end of the tube, placed in a machining position, and it performs during machining a rotational movement about the set center axis S from.
  • Fig. 2 shows in a plan view, the tube 3 in the clamping position.
  • the in Fig. 2 shown front Zentrischspanner 1 includes the left and right front jaw 6, 7, which cooperate for clamping the tube 3.
  • the clamping jaws 6, 7 are centrically movable toward one another in order to clamp the tube 3 in the clamping position, in order then to be subjected to machining and to be moved centrally away from one another in order to release the tube 3 in a release position, which is then moved by means of a (not shown) Gripper arm can be removed from the clamping device.
  • the clamping device does not always clamp the ideal circular tube 3 in the zero position without offset, according to Fig. 2 , one. It can lead to an offset between pipe center axis R and Sollstoffachse S.
  • the offset results from an eccentricity of the processing, ie, for example, from circumferentially different Anfastiefen the pipe end in the subsequent processing step.
  • Both centric clamps 1, 2 have exactly two clamping jaws 6, 7, 11, 12.
  • the clamping jaws 6, 7, 11, 12 are in the respective Zentrischspanner 1, 2 associated traversing plane movable.
  • the traverse plane is arranged perpendicular to the set center axis S.
  • the two paths of the Zentrischspanner 1, 2 are parallel to each other.
  • the two clamping jaws 6, 7, 11, 12 of each Zentrischspanners 1, 2 each have three mutually parallel column 13a, 13b, 13c, 14a, 14b, 14c.
  • the two upper columns 13c, 14c and the two lower columns 13a, 14a are each the same length and slightly longer than the two middle column 13b, 14b in Fig. 2 educated.
  • the three gaps 13a, 13b, 13c, 14a, 14b, 14c of each clamping jaw 6, 7 extend from the wall of the clamping jaw 6, 7 facing the respective clamping jaw 6, 7 in the traverse plane straight into the respective clamping jaw 6, 7 , 11, 12 into it.
  • the opposite column 13a, 13b, 13c, 14a, 14b, 14c of the two opposing jaws 6, 7 are in the same vertical height and in a straight line Extension arranged to each other.
  • the three gaps 13a, 13b, 13c, 14a, 14b, 14c of a clamping jaw 6, 7 each form two deformable tongues 16a, 16b, 17a, 17b.
  • Each of the clamping jaws 6, 7 has two prismatic support parts 8a, 8b, 9a, 9b.
  • a prismatic support is characterized by the fact that it has two straight bearing surfaces arranged at right angles to one another, which are curved into one another.
  • Two opposing and cooperating prismatic supports make it possible to hold tubes 3 of different diameters firmly clamped in the clamping position, wherein the tube 3 rests in each Zentrischspanner 1, 2 along four support lines on the two prismatic support.
  • Each of the prismatic supports forms two support lines.
  • each of the prismatic supports is separated by a middle gap 13b, 14b into respectively an upper and a lower support part 8a, 8b, 9a, 9b.
  • the left upper support part 8b is disposed on the left upper tongue 16b
  • the left lower support part 8a is disposed on the left lower tongue 16a. Due to the mobility of the tongues 16a, 16b and the associated mutual displaceability of the partial supports 8a, 8b, 9a, 9b against each other, the two prismatic supports can be somewhat deformed in each case, whereby the position of the clamped tube 3 can be changed in the clamping position allows a z. B. due to the above-mentioned influences adjusting the pipe center axis R of the target center axis S. A resulting offset of the axes can thus be reduced and corrected. Accordingly, support parts are provided on the other tongues.
  • the adjusting device has in this embodiment four conical screws 19a, 19b, 21a, 21b per Zentrischspanner 1, 2.
  • the conical bolts 19a, 19b, 21a, 21b are screwed into a respective threaded hole extending in the longitudinal direction L in the associated gap 13a, 13c, 14a, 14c on the end of the upper and lower gap 13a, 13c, 14a, 14c facing the pipe 3.
  • the gap widths of the upper 13c, 14c and lower column 13a, 14a all the same.
  • the respective gap width By screwing the cone screw 19a, 19b, 21a, 21b, the respective gap width can be increased by unscrewing the respective cone screw 19a, 19b, 21a, 21b, the associated gap width can be reduced.
  • the four tongues 16a, 16b, 17a, 17b are each formed so as to have a bias against an adjacent upper and lower jaw frames 22a, 22b, 23a, 23b.
  • Fig. 4 shows the displacement of the pipe center axis R relative to the set center axis S by an offset vertically upward.
  • Fig. 5 shows a perspective view of the Zentrischspanners 1 in Fig. 1 with right upper cone screw 21b and right lower cone screw 21a twisted out and left upper cone screw 19b and left lower cone screw 19a screwed in, respectively.
  • FIGS. 3 to 10 shown settings of the adjustment illustrate the offset from the zero position in accordance Fig. 1 .
  • the adjustment is carried out in the reverse manner, in accordance with the position Fig. 1 in which no adjustment is made, a trial processing of the tube ends is made, and then both ends of the tube 3 are measured with high accuracy.
  • An eccentricity measured in this case is taken as the basis for the readjustment, so that the offset between the pipe center axis R and the setpoint axis S is reduced in accordance with the settings of the conical bolts 19a, 19b, 21a, 21b and, if possible, reversed.
  • a correlation table is created in advance, which allows using the measured eccentricity of the processing of an end of a tube rotation depths of the individual cone screws 19a, 19b, 21 a, 21 b indicate in order to eliminate the eccentricity as completely as possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Clamps And Clips (AREA)

Description

Die Erfindung betrifft eine Spannvorrichtung für stangeförmige Profile mit im Wesentlichen kreisförmigem Querschnitt gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a tensioning device for rod-shaped profiles with a substantially circular cross-section according to the preamble of claim 1.

Spannvorrichtungen für Rohre, als besondere Ausbildung eines stangenförmigen Profils, sind im Stand der Technik bekannt. Dabei weisen die Spannvorrichtungen zwei voneinander beabstandete Zentrischspanner auf. Die beiden Zentrischspanner umfassen das Rohr in einer Spannstellung im Bereich der Rohrenden. Rohrenden des in der Spannstellung eingespannten Rohres können einer weiteren Bearbeitung zugeführt werden. Dazu werden die Rohrenden beispielsweise angefast, entgratet, gebürstet usw. Problematisch an den bekannten Spannvorrichtungen ist die nicht hinreichende Lageexaktheit des eingespannten Rohres. Das heißt, aufgrund vielfacher äußerer Umstände wie Temperatur, Materialveränderung usw. weicht die Sollmittelachse der Spannvorrichtung von der Rohrmittelachse des eingespannten Rohres in der Regel etwas ab. Die Abweichungen können minimal sein, d.h. im Mikrometerbereich. Aufgrund immer strenger werdender Qualitätsvorgaben der weiterverarbeitenden Industrie an den Hersteller ist selbst ein derart geringer Versatz der Rohrmittelachse des eingespannten Rohres nicht mehr hinnehmbar. Denn die mit einer ebenfalls geringen, aber vorhandenen Streuung verbundene nachfolgende Bearbeitung der Rohrenden, beispielsweise durch das Anbringen von Fasen, führt zu einem aufsummierten Fehler, wobei der Hersteller Gefahr läuft, nicht mehr den strengen Abnahmekriterien zu genügen.Clamping devices for pipes, as a special embodiment of a rod-shaped profile, are known in the art. In this case, the clamping devices on two spaced Zentrischspanner. The two centric clamps comprise the tube in a clamping position in the region of the tube ends. Pipe ends of the clamped in the clamping position tube can be supplied for further processing. For this purpose, the pipe ends are, for example, chamfered, deburred, brushed, etc. The problem with the known clamping devices is the insufficient position exactness of the clamped pipe. That is, due to multiple external circumstances such as temperature, material change, etc. deviates the desired central axis of the clamping device of the pipe center axis of the clamped pipe usually something. The deviations may be minimal, i. in the micrometer range. Due to ever stricter quality specifications of the processing industry to the manufacturer even such a small offset of the pipe center axis of the clamped pipe is no longer acceptable. Because the subsequent processing of the pipe ends, for example by the attachment of chamfers, which is also associated with a small but existing scattering, leads to an accumulated error, whereby the manufacturer runs the risk of no longer meeting the strict acceptance criteria.

Aus der DE 10 2006 035 131 B3 ist eine Maschine zum Einbringen von Markierungen auf der Außenfläche eines Rohres bekannt. Dort kann die Relativstellung des Rohres zu einem Markierwerkzeug mit Hilfe ineinander verfahrbarer Stützplatten verändert werden.From the DE 10 2006 035 131 B3 For example, a machine for introducing markings on the outer surface of a pipe is known. There, the relative position of the tube can be changed to a marking tool by means of one another movable support plates.

Aus der US 4,667,548 ist eine Werkauflage zur Bearbeitung von Rohrendabschnitten bekannt. Dort wird ein Rohr zwischen Auflagen eingespannt. Eine Justierung des Rohrendes ist mit Hilfe eines Schraubstabes möglich, durch den zwei Hälften der Werkauflage gegeneinander verfahrbar sind, ein gezieltes Nachjustieren der Stellung des Rohrabschnittes in der Querschnittsebene senkrecht zur Rohrlängsachse wird jedoch nicht ermöglicht.From the US 4,667,548 is a work edition for the processing of pipe end sections known. There, a pipe is clamped between pads. An adjustment of the pipe end is possible by means of a Schraubstabes, by the two halves of the work support are moved against each other, a targeted readjustment of the position of the pipe section in the cross-sectional plane perpendicular to the pipe axis is not possible.

In der DE 42 17 860 A1 ist eine Spannvorrichtung vorgesehen, mit Hilfe der eine Rohr- oder Fräsmaschine am Ende eines Rohres anbringbar ist. Die Spannvorrichtung ermöglicht nicht das Nachjustieren des aufgebrachten Fräswerkzeugs gegenüber dem Rohrabschnitt.In the DE 42 17 860 A1 a clamping device is provided by means of a pipe or milling machine at the end of a pipe is attachable. The clamping device does not allow the readjustment of the applied milling tool relative to the pipe section.

Aus der JP 631564 ist eine Spannvorrichtung mit zwei gegeneinander verfahrbaren Spannbacken, die zum Einspannen von Langprofilen geeignet sind.From the JP 631564 is a clamping device with two mutually movable clamping jaws, which are suitable for clamping long profiles.

Aus der US 6,065,744 ist ein Halter für ein Bauteil bekannt mit zwei nebeneinander angeordneten Auflagen zwischen denen sich eine V-förmige Auflage ausbildet, die die Verschiebung der Auflagen horizontal und vertikal veränderbar ist.From the US 6,065,744 is a holder for a component known with two juxtaposed pads between which forms a V-shaped support, which is the displacement of the pads horizontally and vertically changeable.

Es ist daher Aufgabe der Erfindung, eine Spannvorrichtung für stangenförmige Profile zur Verfügung zu stellen, die ein exakteres Einspannen des stangenförmigen Profils ermöglicht.It is therefore an object of the invention to provide a clamping device for rod-shaped profiles available, which allows a more precise clamping of the rod-shaped profile.

Die Aufgabe wird durch eine eingangs genannte Spannvorrichtung mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst.The object is achieved by an aforementioned clamping device with the characterizing features of claim 1.

Die Erfindung macht von der Idee Gebrauch, den sich beim Einspannen eines stangenförmigen Profils in einer Spannvorrichtung im Laufe der Zeit einstellenden oder von vornherein bestehenden Versatz zwischen Sollmittelachse und Profilmittelachse durch eine Justiereinrichtung zu verringern. Unter stangenförmigem Profil werden hier unter anderem Rohre und Vollprofile verstanden. Die Spanneinrichtung weist vorzugsweise zwei Zentrischspanner auf. Es ist aber auch eine Ausbildung mit einer beliebig höheren Anzahl an Zentrischspannern möglich. Die Profile sind in einem Querschnitt quer zu ihrer Längsrichtung im Wesentlichen kreisförmig, vorzugsweise exakt kreisförmig ausgeformt. Günstigerweise sind die Profile entlang ihrer gesamten Länge im Wesentlichen, vorzugsweise exakt kreisförmig im Querschnitt. Der Querschnitt ist günstigerweise senkrecht zur Längsachse angeordnet.The invention makes use of the idea that to reduce when adjusting a rod-shaped profile in a clamping device over time adjusting or from the outset existing offset between the desired central axis and profile central axis by an adjusting device. Under rod-shaped profile are understood here, inter alia, tubes and solid profiles. The clamping device preferably has two Zentrischspanner. But it is also a training with an arbitrarily higher number of Zentrischspannern possible. The profiles are in a cross section transverse to its longitudinal direction substantially circular, preferably formed exactly circular. Conveniently, the profiles are substantially along their entire length, preferably exactly circular in cross-section. The cross section is conveniently arranged perpendicular to the longitudinal axis.

Die Profile liegen auf Auflagen der Zentrischspanner auf. Die Justierung erfolgt durch Veränderung der Form der Auflagen.The profiles rest on supports of the centric clamps. The adjustment is done by changing the shape of the pads.

Vorzugsweise weist jeder der Zentrischspanner genau zwei zentrisch verfahrbare Spannbacken auf. Jeder der Zentrischspanner kann drei, vier oder auch eine beliebig höhere Anzahl an Spannbacken aufweisen.Each of the centric clamps preferably has exactly two centrically movable clamping jaws. Each of the Zentrischspanner can have three, four or even an arbitrarily higher number of clamping jaws.

Der Zentrischspanner ermöglicht das exakte aufeinander Zu- und voneinander Wegfahren der Spannbacken sich gegenüberliegender Spannbacken in einer Verfahrebene. Günstigerweise weist jede der Spannbacken genau eine Auflage auf. Vorzugsweise ist wenigstens eine der Auflagen in zwei oder eine beliebigere höhere Anzahl von Teilauflagen aufgeteilt. Die Auflagen sind vorzugsweise prismatisch ausgebildet.The Zentrischspanner allows the exact approach to each other and each other driving away the jaws of opposing jaws in a traversing plane. Conveniently, each of the jaws on exactly one edition. Preferably, at least one of the pads is divided into two or a more arbitrary higher number of partial pads. The pads are preferably formed prismatic.

In einer günstigen Ausführungsform der Erfindung weist jede der Spannbacken jeweils eine prismatisch ausgeformte Auflage auf, wobei jede der prismatischen Auflagen zwei in einer Längsrichtung des eingespannten Rohres verlaufende gerade Auflageflächen aufweisen, die zueinander senkrecht stehen.In a favorable embodiment of the invention, each of the clamping jaws in each case has a prismatically shaped support, wherein each of the prismatic supports has two straight bearing surfaces running in a longitudinal direction of the clamped tube, which are perpendicular to one another.

Günstigerweise ist durch die Justiereinrichtung eine Abweichung der Profilmittelachse des eingespannten Profils von der Sollmittelachse in allen Richtungen der Verfahrensebene einstellbar. Somit ist es möglich, den Versatz in jeder beliebigen Richtung zu korrigieren.Conveniently, a deviation of the profile central axis of the clamped profile of the desired central axis in all directions of the process plane adjustable by the adjusting device. Thus, it is possible to correct the offset in any direction.

Besonders einfach lässt sich die Auflage in ihrer Form bei einer Ausführungsform verändern, in der jede der Spannbacken wenigstens drei Spalte aufweist. Die Spalte einer Spannbacke erstrecken sich vorzugsweise in Längsrichtung jeweils über die gesamte Länge der Spannbacke und bilden damit jeweils zwischen sich eine verformbare Zunge aus. Die verformbare Zunge ist günstigerweise derart in der Spannbacke ausgebildet, dass sie an der der gegenüberliegenden Spannbacke zugewandten Außenwandung eine Teilauflage ausbildet.In a particularly simple way, the support can be changed in shape in an embodiment in which each of the clamping jaws has at least three gaps. The gaps of a clamping jaw preferably extend in the longitudinal direction in each case over the entire length of the clamping jaw and thus each form a deformable tongue between them. The deformable tongue is conveniently formed in the clamping jaw so that it forms a partial support on the opposite clamping jaw facing outer wall.

Durch Verformung der Zunge wird die der Zunge zugeordnete Teilauflage in ihrer Lage gegenüber der Spannbacke verändert und die aus mindestens zwei Teilauflagen gebildete Auflage der Spannbacke erhält eine etwas andere Gesamtform. Ein in der Spannstellung auf den Auflagen aufliegendes Profil ändert seine relative Position zur Spannbacke ebenfalls ein Stück weit. Diese Veränderung wird zur Verringerung des Versatzes genutzt.By deformation of the tongue associated with the tongue part support is changed in position relative to the clamping jaw and formed of at least two partitions support the jaw receives a slightly different overall shape. A resting in the clamping position on the supports profile also changes its relative position to the jaw a piece. This change is used to reduce the offset.

Günstigerweise weist jede der Spannbacken genau drei, einen oberen, einen unteren und einen mittleren Spalt auf, die zwischen sich genau zwei nebeneinander angeordnete verformbare Zungen ausbilden, die durch den mittleren Spalt voneinander getrennt sind. An jeder der Zungen ist dabei eine Teilauflage der Auflagen einer Spannbacke vorgesehen. Jede der Spannbacken kann einstückig ausgebildet sein, insbesondere die Zungen und der zugehörige Spannbackenrahmen können einteilig sein. Die Spannbacke kann hochpräzise im Erodierverfahren hergestellt werdenConveniently, each of the jaws on exactly three, an upper, a lower and a middle gap, which form between them exactly two juxtaposed deformable tongues, which are separated by the middle gap. At each of the tongues while a partial edition of the requirements of a jaw is provided. Each of the clamping jaws may be formed in one piece, in particular the tongues and the associated clamping jaw frame may be in one piece. The clamping jaw can be manufactured with high precision in the EDM process

Durch die Verformung der vorzugsweise zwei Zungen einer Spannbacke wird die Form der vorzugsweise prismatischen Auflage etwas verändert. Günstigerweise werden die Veränderungen derart vorgenommen, dass die sich gegenüberliegenden und zusammenwirkenden Spannbacken eines Zentrischspanners derart verändert werden, dass die Sollmittelachse und die Profilmittelachse nach der Justierung zusammenfallen.Due to the deformation of the preferably two tongues of a clamping jaw, the shape of the preferably prismatic support is slightly changed. Conveniently, the changes are made such that the opposing and cooperating jaws of a Zentrischspanners be changed such that the desired central axis and the profile central axis coincide after adjustment.

Gemäß der Erfindung umfasst die Justiereinrichtung wenigstens ein in einer Breite einstellbar veränderbares Abstandsbauteil. Das Abstandbauteil kann in einen zugehörigen Spalt eingefügt sein und an den Spaltwandungen anliegen oder in sie eindringen. Durch Veränderung der Breite des Abstandsbauteils im Spalt ist die Spaltbreite veränderbar. Die Spaltbreite kann durch die Breite des Abstandsbauteils ebenfalls eingestellt werden, dass heißt, die Spaltbreite bleibt in der durch das Abstandsbauteil eingestellten Breite für den zumindest nächsten Bearbeitungsschritt erhalten. Es können dann nachfolgend Neueinstellungen vorgenommen werden.According to the invention, the adjusting device comprises at least one adjustable width adjustable spacer member. The spacer member may be inserted in an associated gap and abut or penetrate the gap walls. By changing the width of the spacer in the gap, the gap width is variable. The gap width can also be adjusted by the width of the spacer component, that is, the gap width is maintained in the width set by the spacer component for the at least next processing step. You can then make new settings below.

Vorzugsweise weist jede der Spannbacken genau drei Spalte auf und Abstandsbauteile sind in die übernächste Spalte eingelassen. Es sind jedoch auch Ausführungsformen offenbart, die Spannbacken mit jeder beliebigen Anzahl an Spalten aufweisen, insbesondere vier oder einer höheren Anzahl von Spalten. Abstandsbauteile sind vorzugsweise in jeden der Spalte oder in nur ausgewählte Spalte eingelassen.Preferably, each of the jaws on exactly three column and spacer components are embedded in the next but one column. However, embodiments are also disclosed which have clamping jaws of any number of columns, in particular four or more columns. Spacer members are preferably recessed in each of the slots or in only selected slots.

Nachdem das Profil in die Spanneinrichtung eingespannt ist, wird vorzugsweise eine Profilbearbeitung des eingespannten Profils vorgenommen. Dabei können Profilenden, beispielsweise Rohrenden mit einer Fase versehen werden. Wenn die Rohrmittelachse nicht mit der Sollmittelachse der Spannvorrichtung übereinstimmt, führt die nachträgliche Profilendenbearbeitung zu einer Exzentrizität, die durch eine separate Messeinrichtung gemessen werden kann. Die Größe und Lage der gemessenen Exzentrizität wird verwendet, um eine entsprechende Nachjustierung mittels der Justiereinrichtung vorzunehmen. Günstigerweise wird dazu vorab eine Korrelationstabelle erstellt, die es ermöglicht, je nach gemessener Exzentrizität sofort eine Justiereinstellung der Justiereinrichtung zu bestimmen, die zu einer zumindest deutlichen Verringerung des Versatzes der beiden Mittelachsen führt.After the profile is clamped in the clamping device, a profile machining of the clamped profile is preferably carried out. This profile ends, such as pipe ends can be provided with a chamfer. If the pipe central axis does not coincide with the desired central axis of the clamping device, the subsequent profile end machining leads to an eccentricity, which can be measured by a separate measuring device. The size and location of the measured eccentricity is used to make a corresponding readjustment by means of the adjusting device. Conveniently, a correlation table is created in advance, which makes it possible, depending on the measured eccentricity to immediately determine an adjustment of the adjustment, which leads to an at least significant reduction in the offset of the two central axes.

In einer bevorzugten Ausführungsform der Erfindung weisen die Abstandselemente der Justiereinrichtung Kegelschrauben auf mit einem geringen Kegelwinkel von weniger als 1 Grad, die in ein in einen zugehörigen Spalt eingebrachtes Gewinde eingelassen sind und durch Ein- und Ausdrehen in das und aus dem Gewinde die Spaltbreite vergrößern bzw. verringern. Es sind auch Kegelwinkel von weniger als 0,5 Grad, 0,2 Grad oder noch weniger denkbar.In a preferred embodiment of the invention, the spacer elements of the adjusting device have conical screws with a small cone angle of less than 1 degree, which are embedded in a thread inserted into an associated gap and increase or enlarge the gap width by turning in and out of the thread . reduce. Also, cone angles of less than 0.5 degrees, 0.2 degrees, or even less are conceivable.

In anderen Ausführungsformen der Justiereinrichtung sind die Abstandsbauteile als Piezoelemente oder andere, vorzugsweise keilförmig ausgeformte Bauteile ausgebildet. Es sind auch Mischformen der Abstandsbauteile möglich oder die Verwendung verschiedener Abstandsbauteile in derselben Spannvorrichtung.In other embodiments of the adjusting device, the spacer components are designed as piezo elements or other, preferably wedge-shaped components. Mixed forms of the spacer components are also possible or the use of different spacer components in the same clamping device.

Die erfindungsgemäße Spannvorrichtung kann ein Bauteil einer Profilschneidemaschine sein. Sie ist im Bearbeitungsgang vorzugsweise nach einem Sägewerkzeug vorgesehen. Aus dem Sägewerkzeug kann das abgelängte Profil mittels eines Greifarmes in der Freigabestellung der Spannvorrichtung dort eingelegt werden und dann dort eingespannt werden. In der Spannstellung erfolgt die hochpräzise Nachbearbeitung wie oben beschrieben. Die Spannvorrichtung wird danach wieder in die Freigabestellung überführt und das bearbeitete Profil mittels eines vorzugsweise anderen Greifarmes herausgenommen.The tensioning device according to the invention may be a component of a profile cutting machine. It is preferably provided in the processing gear for a sawing tool. From the sawing tool, the cut-to-length profile can be inserted there by means of a gripping arm in the release position of the clamping device and then clamped there. In the clamping position, the high-precision post-processing is carried out as described above. The clamping device is then transferred back to the release position and removed the processed profile by means of a preferably other gripping arm.

Die Erfindung wird anhand eines Ausführungsbeispiels in zehn Figuren beschrieben. Dabei zeigen:

Fig. 1
eine perspektivische Ansicht einer erfindungsgemäßen Spannvorrichtung in Nullstellung,
Fig. 2
eine Vorderansicht in Fig. 1,
Fig. 3
eine perspektivische Ansicht der Spannvorrichtung in Fig. 1 mit herausgedrehten oberen Kegelschrauben und hineingedrehten unteren Kegelschrauben,
Fig. 4
eine Vorderansicht in Fig. 3,
Fig. 5
eine Spannvorrichtung in Fig. 1 mit herausgedrehten rechten Kegelschrauben und hineingedrehten linken Kegelschrauben,
Fig. 6
eine Vorderansicht in Fig. 5,
Fig. 7
eine Spannvorrichtung in Fig. 1 mit herausgedrehten unteren Kegelschrauben und hineingedrehten oberen Kegelschrauben,
Fig. 8
eine Vorderansicht in Fig. 7,
Fig. 9
eine Spannvorrichtung in Fig. 1 mit herausgedrehter oberer rechter Kegelschraube und hineingedrehter unterer linker Kegelschraube,
Fig. 10
eine Vorderansicht in Fig. 9.
The invention will be described with reference to an embodiment in ten figures. Showing:
Fig. 1
a perspective view of a tensioning device according to the invention in zero position,
Fig. 2
a front view in Fig. 1 .
Fig. 3
a perspective view of the clamping device in Fig. 1 with unscrewed upper conical screws and lower conical screws screwed in,
Fig. 4
a front view in Fig. 3 .
Fig. 5
a tensioning device in Fig. 1 with unscrewed right-hand conical screws and left-hand tapered screws screwed in,
Fig. 6
a front view in Fig. 5 .
Fig. 7
a tensioning device in Fig. 1 with unscrewed lower conical screws and turned in upper conical screws,
Fig. 8
a front view in Fig. 7 .
Fig. 9
a tensioning device in Fig. 1 with upper right cone screw twisted out and lower left cone screw screwed in,
Fig. 10
a front view in Fig. 9 ,

Die Darstellungen sind nicht maßstabsgetreu, und die Verformungen sind stark übertrieben. Gleiche Bezugszeichen bezeichnen gleiche Bauteile in den verschiedenen Figuren.The illustrations are not to scale, and the deformations are greatly exaggerated. Like reference numerals designate like components throughout the several figures.

Fig. 1 zeigt eine erfindungsgemäße Spannvorrichtung mit einem vorderen 1 und einem hinteren 2 in einer Längsrichtung L voneinander beabstandeten Zentrischspanner, zwischen denen ein Rohr 3 eingespannt ist. Die Bezeichnungen, 'vorne', 'hinten', 'oben', 'unten', 'links' und 'rechts' beziehen sich auf die Positionen der jeweiligen Bauteile relativ zur Spannvorrichtung, wie sie in den Figuren dargestellt ist. Es sind jedoch auch alle anderen Lagen der Spannvorrichtung mit offenbart. Jeder der beiden Zentrischspanner 1, 2 weist zwei zentrisch zueinander verfahrbare Spannbacken 6, 7 auf. Die von den beiden Spannbacken 6, 7 des jeweiligen Zentrischspanners 1, 2 überfahrene Ebene bildet eine Verfahrebene aus. Die beiden Zentrischspanner 1, 2 sind jeweils auf einer (nicht dargestellten) Verfahreinrichtung montiert, die vorzugsweise über Druckluft als Steuermedium betrieben wird. Jede vordere Spannbacke 6, 7 weist eine prismatische Auflage auf. Der vordere 1 und der hintere Zentrischspanner 2 sind baugleich. Fig. 1 shows a clamping device according to the invention with a front 1 and a rear 2 in a longitudinal direction L spaced from each other Zentrischspanner between which a pipe 3 is clamped. The terms 'front', 'rear', 'top', 'bottom', 'left' and 'right' refer to the positions of the respective components relative to the tensioning device as shown in the figures. However, all other layers of the tensioning device are also disclosed. Each of the two centric clamps 1, 2 has two clamping jaws 6, 7 which can be moved centrally relative to each other. The plane traversed by the two clamping jaws 6, 7 of the respective centric clamp 1, 2 forms a traversing plane. The two Zentrischspanner 1, 2 are each mounted on a (not shown) traversing device, which is preferably operated by compressed air as a control medium. Each front jaw 6, 7 has a prismatic support. The front 1 and the rear Zentrischspanner 2 are identical.

Das in Fig. 1 dargestellte Rohr 3 weist eine Rohrmittelachse R auf, und die beiden Zentrischspanner 1, 2 weisen eine Sollmittelachse S auf, die mittig durch die beiden Zentrischspanner 1, 2 verläuft. Das Rohr 3 ist in den beiden Zentrischspannern 1, 2 eingespannt. Die Spannvorrichtung befindet sich daher in einer Spannstellung.This in Fig. 1 shown tube 3 has a tube center axis R, and the two Zentrischspanner 1, 2 have a desired central axis S, which extends centrally through the two Zentrischspanner 1, 2. The tube 3 is clamped in the two Zentrischspannern 1, 2. The clamping device is therefore in a clamping position.

Rohrenden des in den beiden Zentrischspannern 1, 2 eingespannten Rohres 3 stehen in der Spannstellung ein stückweit über die Spannbacken 6, 7, 11, 12 des Zentrischspanners 1, 2 hinaus ab. Die freien Rohrenden können in der Spannstellung damit einer Bearbeitung in Form von Bürsten, Entgraten und/oder Anfasen mittels eines (nicht dargestellten) Werkzeugskopfes unterworfen werden. Der Werkzeugkopf wird zur Bearbeitung von außen zum freien Rohrende geführt, in eine Bearbeitungsstellung gebracht, und er führt während der Bearbeitung eine Rotationsbewegung um die Sollmittelachse S aus.Pipe ends of the clamped in the two centric clamps 1, 2 pipe 3 are in the clamping position a piece over the jaws 6, 7, 11, 12 of the centric clamp 1, 2 also off. The free pipe ends can in the clamping position thus processing in Be subjected to brushing, deburring and / or chamfering by means of a (not shown) tool head. The tool head is guided for machining from the outside to the free end of the tube, placed in a machining position, and it performs during machining a rotational movement about the set center axis S from.

Fig. 2 zeigt in einer Draufsicht das Rohr 3 in der Spannstellung. Der in Fig. 2 dargestellte vordere Zentrischspanner 1 umfasst die linke und rechte vordere Spannbacke 6, 7, die zum Einspannen des Rohres 3 zusammenwirken. Die Spannbacken 6, 7 sind zentrisch aufeinander zu verfahrbar, um in der Spannstellung das Rohr 3 festzuspannen, um dann einer Bearbeitung unterzogen zu werden und zentrisch voneinander weg verfahrbar, um in einer Freigabestellung das Rohr 3 freizugeben, das dann mittels eines (nicht dargestellten) Greifarmes aus der Spannvorrichtung entnehmbar ist. Fig. 2 shows in a plan view, the tube 3 in the clamping position. The in Fig. 2 shown front Zentrischspanner 1 includes the left and right front jaw 6, 7, which cooperate for clamping the tube 3. The clamping jaws 6, 7 are centrically movable toward one another in order to clamp the tube 3 in the clamping position, in order then to be subjected to machining and to be moved centrally away from one another in order to release the tube 3 in a release position, which is then moved by means of a (not shown) Gripper arm can be removed from the clamping device.

Die Rohrmittelachse R und die Sollmittelachse S der Spannvorrichtung fallen in Fig. 1 und Fig. 2 zusammen. An der Sollmittelachse S wird die nachfolgende Bearbeitung der Rohrenden mittels des Werkzeugkopfes ausgerichtet. Ein Versatz zwischen Rohrmittelachse R und Sollmittelachse S führt somit zu einer Exzentrizität in der Bearbeitung des Rohrendes. In Fig. 2 ist die Nullposition dargestellt, dort liegt kein Versatz vor.The pipe center axis R and the set center axis S of the tensioning device fall in Fig. 1 and Fig. 2 together. At the desired central axis S, the subsequent processing of the pipe ends is aligned by means of the tool head. An offset between the pipe center axis R and the set center axis S thus leads to an eccentricity in the machining of the pipe end. In Fig. 2 If the zero position is shown, there is no offset.

Aufgrund diverser Einflüsse wie Temperaturschwankungen, Materialveränderungen im Laufe der Zeit und vielen anderen Einflussfaktoren spannt die Spannvorrichtung selbst das ideale kreisförmige Rohr 3 nicht immer in der Nullposition ohne Versatz, gemäß Fig. 2, ein. Es kann zu einem Versatz zwischen Rohrmittelachse R und Sollmittelachse S kommen. Der Versatz resultiert aus einer Exzentrizität der Bearbeitung, d. h. beispielsweise aus umlaufend unterschiedlichen Anfastiefen des Rohrendes im nachfolgenden Bearbeitungsschritt.Due to various influences such as temperature fluctuations, material changes over time and many other factors, the clamping device does not always clamp the ideal circular tube 3 in the zero position without offset, according to Fig. 2 , one. It can lead to an offset between pipe center axis R and Sollmittelachse S. The offset results from an eccentricity of the processing, ie, for example, from circumferentially different Anfastiefen the pipe end in the subsequent processing step.

Beide Zentrischspanner 1, 2 weisen genau zwei Spannbacken 6, 7, 11, 12 auf. Die Spannbacken 6, 7, 11, 12 sind in der dem jeweiligen Zentrischspanner 1, 2 zugeordneten Verfahrebene verfahrbar. Die Verfahrebene ist senkrecht zur Sollmittelachse S angeordnet. Die beiden Verfahrebenen der Zentrischspanner 1, 2 verlaufen parallel zueinander.Both centric clamps 1, 2 have exactly two clamping jaws 6, 7, 11, 12. The clamping jaws 6, 7, 11, 12 are in the respective Zentrischspanner 1, 2 associated traversing plane movable. The traverse plane is arranged perpendicular to the set center axis S. The two paths of the Zentrischspanner 1, 2 are parallel to each other.

Die beiden Spannbacken 6, 7, 11, 12 jedes Zentrischspanners 1, 2 weisen jeweils drei parallel zueinander angeordnete Spalte 13a, 13b, 13c, 14a, 14b, 14c auf. Die beiden oberen Spalte 13c, 14c und die beiden unteren Spalte 13a, 14a sind jeweils gleich lang und etwas länger als die beiden mittleren Spalte 13b, 14b in Fig. 2 ausgebildet. Die drei Spalte 13a, 13b, 13c, 14a, 14b, 14c jeder Spannbacke 6, 7 verlaufen von der der jeweils in der Verfahrebene gegenüberliegenden Spannbacke 6, 7 zugewandten Wandung der Spannbacke 6, 7 in Verfahrrichtung V geradlinig in die jeweilige Spannbacke 6, 7, 11, 12 hinein. Die sich gegenüberliegenden Spalte 13a, 13b, 13c, 14a, 14b, 14c der beiden sich gegenüberliegenden Spannbacken 6, 7 sind in gleicher senkrechter Höhe und in gerader Verlängerung zueinander angeordnet. Die drei Spalte 13a, 13b, 13c, 14a, 14b, 14c einer Spannbacke 6, 7 bilden jeweils zwei verformbare Zungen 16a, 16b, 17a, 17b aus.The two clamping jaws 6, 7, 11, 12 of each Zentrischspanners 1, 2 each have three mutually parallel column 13a, 13b, 13c, 14a, 14b, 14c. The two upper columns 13c, 14c and the two lower columns 13a, 14a are each the same length and slightly longer than the two middle column 13b, 14b in Fig. 2 educated. The three gaps 13a, 13b, 13c, 14a, 14b, 14c of each clamping jaw 6, 7 extend from the wall of the clamping jaw 6, 7 facing the respective clamping jaw 6, 7 in the traverse plane straight into the respective clamping jaw 6, 7 , 11, 12 into it. The opposite column 13a, 13b, 13c, 14a, 14b, 14c of the two opposing jaws 6, 7 are in the same vertical height and in a straight line Extension arranged to each other. The three gaps 13a, 13b, 13c, 14a, 14b, 14c of a clamping jaw 6, 7 each form two deformable tongues 16a, 16b, 17a, 17b.

Jede der Spannbacken 6, 7 weist zwei prismatische Auflagenteile 8a, 8b, 9a, 9b auf. Eine prismatische Auflage zeichnet sich dadurch aus, dass sie zwei im rechten Winkel zueinander angeordnete gerade Auflageflächen aufweist, die gekrümmt ineinander überführt sind. Zwei sich gegenüberliegende und zusammenwirkende prismatische Auflagen gestatten es, Rohre 3 unterschiedlichen Durchmessers in der Spannstellung fest eingespannt zu halten, wobei das Rohr 3 dabei in jedem Zentrischspanner 1, 2 entlang von vier Auflagelinien auf den beiden prismatischen Auflage aufliegt. Jede der prismatischen Auflagen bildet jeweils zwei Auflagelinien aus. Erfindungsgemäß ist jede der prismatischen Auflagen durch einen mittleren Spalt 13b, 14b in jeweils einen oberen und einen unteren Auflageteil 8a, 8b, 9a, 9b getrennt. Das linke obere Auflageteil 8b ist an der linken oberen Zunge 16b und das linke untere Auflageteil 8a ist an der linken unteren Zunge 16a angeordnet. Aufgrund der Beweglichkeit der Zungen 16a, 16b und der damit verbundenen gegenseitigen Verschiebbarkeit der Teilauflagen 8a, 8b, 9a, 9b gegeneinander können die beiden prismatischen Auflagen jeweils insgesamt etwas verformt werden, wodurch sich die Lage des eingespannten Rohres 3 in der Spannstellung verändern lässt Die Veränderung ermöglicht es, einen sich z. B. aufgrund der oben genannten Einflüsse einstellenden Versatz der Rohrmittelachse R von der Sollmittelachse S. Ein entstehender Versatz der Achsen kann somit verringert und korrigiert werden. Entsprechend sind Auflagenteile an den anderen Zungen vorgesehen.Each of the clamping jaws 6, 7 has two prismatic support parts 8a, 8b, 9a, 9b. A prismatic support is characterized by the fact that it has two straight bearing surfaces arranged at right angles to one another, which are curved into one another. Two opposing and cooperating prismatic supports make it possible to hold tubes 3 of different diameters firmly clamped in the clamping position, wherein the tube 3 rests in each Zentrischspanner 1, 2 along four support lines on the two prismatic support. Each of the prismatic supports forms two support lines. According to the invention, each of the prismatic supports is separated by a middle gap 13b, 14b into respectively an upper and a lower support part 8a, 8b, 9a, 9b. The left upper support part 8b is disposed on the left upper tongue 16b, and the left lower support part 8a is disposed on the left lower tongue 16a. Due to the mobility of the tongues 16a, 16b and the associated mutual displaceability of the partial supports 8a, 8b, 9a, 9b against each other, the two prismatic supports can be somewhat deformed in each case, whereby the position of the clamped tube 3 can be changed in the clamping position allows a z. B. due to the above-mentioned influences adjusting the pipe center axis R of the target center axis S. A resulting offset of the axes can thus be reduced and corrected. Accordingly, support parts are provided on the other tongues.

Die Justiereinrichtung weist in dieser Ausführungsform vier Kegelschrauben 19a, 19b, 21 a, 21b pro Zentrischspanner 1, 2 auf. Die Kegelschrauben 19a, 19b, 21a, 21b sind an dem dem Rohr 3 zugewandten Ende des oberen und unteren Spaltes 13a, 13c, 14a, 14c in jeweils eine in dem zugehörigen Spalt 13a, 13c, 14a, 14c in Längsrichtung L verlaufende Gewindebohrung eingedreht. In der in Fig. 1 dargestellten Nulllage sind die Spaltbreiten der oberen 13c, 14c und unteren Spalte 13a, 14a alle gleich. Durch Eindrehen der Kegelschraube 19a, 19b, 21a, 21b lässt sich die jeweilige Spaltbreite vergrößern, durch Herausdrehen der jeweiligen Kegelschraube 19a, 19b, 21 a, 21 b lässt sich die zugehörige Spaltbreite verringern. Die vier Zungen 16a, 16b, 17a, 17b sind jeweils so ausgeformt, dass sie eine Vorspannung gegenüber einem ihr benachbarten oberen und unteren Spannbackenrahmen 22a, 22b, 23a, 23b aufweisen. Die oberen und unteren Spannbackenrahmen 22a, 22b, 23a, 23b sind deutlich schwerer verformbar als die vier Zungen 16a, 16b, 17a, 17b, weil der obere und untere Spannbackenrahmen 22a, 22b, 23a, 23b in einem dem Rohr 3 abgewandten Bereich deutlich verdickt ist und auch in vertikaler Richtung höher ausgebildet ist als die vier Zungen 16a, 16b, 17a, 17b. Die vier Zungen 16a, 16b, 17a, 17b eines Zentrischspanners 1 weisen alle eine gleiche Länge in Längsrichtung L, Höhe in vertikaler Richtung H und Tiefe in Verfahrrichtung V auf.The adjusting device has in this embodiment four conical screws 19a, 19b, 21a, 21b per Zentrischspanner 1, 2. The conical bolts 19a, 19b, 21a, 21b are screwed into a respective threaded hole extending in the longitudinal direction L in the associated gap 13a, 13c, 14a, 14c on the end of the upper and lower gap 13a, 13c, 14a, 14c facing the pipe 3. In the in Fig. 1 shown zero position, the gap widths of the upper 13c, 14c and lower column 13a, 14a all the same. By screwing the cone screw 19a, 19b, 21a, 21b, the respective gap width can be increased by unscrewing the respective cone screw 19a, 19b, 21a, 21b, the associated gap width can be reduced. The four tongues 16a, 16b, 17a, 17b are each formed so as to have a bias against an adjacent upper and lower jaw frames 22a, 22b, 23a, 23b. The upper and lower clamping jaw frames 22a, 22b, 23a, 23b are significantly more difficult to deform than the four tongues 16a, 16b, 17a, 17b because the upper and lower clamping jaw frames 22a, 22b, 23a, 23b are significantly thickened in a region facing away from the tube 3 is and is also higher in the vertical direction than the four tongues 16a, 16b, 17a, 17b. The four tongues 16a, 16b, 17a, 17b of a centric clamp 1 all have an equal length in the longitudinal direction L, height in the vertical direction H and depth in the direction of travel V.

Fig. 3 zeigt die Spannvorrichtung in Fig. 1 in einer nachjustierten Stellung. Dabei sind die obere linke Kegelschraube 19b und die obere rechte Kegelschraube 21b herausgedreht, so dass die obere linke Zunge 16b und die obere rechte Zunge 17b des vorderen Zentrischspanners 1 durch ihre Vorspannung nach oben verformt werden, während die beiden unteren Kegelschrauben 19a, 21a der linken und rechten Spannbacke 6, 7 des vorderen Zentrischspanners 1 eingedreht sind und sich zugehörigen beiden unteren Zungen 16a, 17a damit nach oben verformen. Dadurch werden die beiden linken Auflagenteile 8a, 8b und rechten prismatischen Auflagenteile 9a, 9b derart verschoben, dass sich das eingespannte Rohr 3 in der Spannstellung nach oben verschiebt. Fig. 3 shows the clamping device in Fig. 1 in a readjusted position. In this case, the upper left taper bolt 19b and the upper right taper bolt 21b are unscrewed so that the upper left tongue 16b and the upper right tongue 17b of the front Zentrischspanners 1 are deformed by their bias upwards, while the two lower taper bolts 19a, 21a of the left and right clamping jaw 6, 7 of the front Zentrischspanners 1 are screwed and its associated two lower tongues 16a, 17a thus deform upwards. As a result, the two left support parts 8a, 8b and right prismatic support parts 9a, 9b are displaced such that the clamped tube 3 shifts upward in the tensioned position.

Fig. 4 zeigt die Verschiebung der Rohrmittelachse R gegenüber der Sollmittelachse S um einen Versatz senkrecht nach oben. Fig. 4 shows the displacement of the pipe center axis R relative to the set center axis S by an offset vertically upward.

Fig. 5 zeigt eine perspektivische Ansicht des Zentrischspanners 1 in Fig. 1 mit herausgedrehter rechter oberer Kegelschraube 21b und rechter unterer Kegelschraube 21a und hineingedrehter linker oberer Kegelschraube 19b und linker unterer Kegelschraube 19a. Fig. 5 shows a perspective view of the Zentrischspanners 1 in Fig. 1 with right upper cone screw 21b and right lower cone screw 21a twisted out and left upper cone screw 19b and left lower cone screw 19a screwed in, respectively.

Fig. 6 zeigt die Verformung der vier Zungen 16a, 16b, 17a, 17b in entsprechender Weise. Durch die Vorspannung und das Herausdrehen der rechten oberen Schraube 21b wird die rechte obere Zunge 17b nach oben verformt. Entsprechend wird die rechte untere Zunge 17a durch Herausdrehen der rechten unteren Kegelschraube 21a nach unten verformt und damit die rechte prismatische Auflage etwas aufgeweitet und das eingespannte Rohr 3 wird ein Stück weit nach rechts versetzt. Der rechte obere 14c und der rechte untere Spalt 14a verengen sich und der rechte mittlere Spalt 14b weitet sich. Fig. 6 shows the deformation of the four tongues 16a, 16b, 17a, 17b in a corresponding manner. By biasing and unscrewing the right upper screw 21b, the right upper tongue 17b is deformed upward. Accordingly, the right lower tongue 17a is deformed by unscrewing the right lower cone screw 21a down and thus the right prismatic edition slightly widened and the clamped tube 3 is a piece far offset to the right. The right upper 14c and the right lower gap 14a narrow and the right middle gap 14b widens.

In der gleichen Justierung in Fig. 6 werden die linke obere Kegelschraube 19b und die linke untere Kegelschraube 19a eingedreht, so dass die beiden linken Zungen 16a, 16b zentrisch aufeinander zu verformt werden, der linke mittlere Spalt 13b verengt sich, der linke obere und linke untere Spalt 13c, 13a verbreitern sich, und die linke prismatische Auflage wird ebenfalls etwas verengt.In the same adjustment in Fig. 6 the left upper cone screw 19b and the lower left cone screw 19a are screwed in so that the two left tongues 16a, 16b are centered on each other, the left middle gap 13b narrows, the upper left and left lower gaps 13c, 13a widen, and the left prismatic overlay is also somewhat narrowed.

Grundsätzlich sollte die Justiereinrichtung mit ihren vier Kegelschrauben 19a, 19b, 21a, 21b derart justiert werden, dass eine Justierung nicht ausschließlich über ein Aus- oder Eindrehen, sondern gleichzeitig über ein zugehöriges Ein- und Ausdrehen korrespondierender Kegelschrauben erfolgt. Fig. 6 zeigt in der Stellung einen Versatz der Rohrmittelachse R zur Sollmittelachse S nach rechts.In principle, the adjusting device with its four conical screws 19a, 19b, 21a, 21b should be adjusted in such a way that an adjustment does not take place exclusively via a screwing or screwing in, but at the same time via an associated screwing in and out of corresponding conical screws. Fig. 6 shows in the position an offset of the pipe center axis R to the set center axis S to the right.

Fig. 7 zeigt die Spannvorrichtung mit ausgedrehten linken Kegelschrauben 19a, 19b und eingedrehten rechten Kegelschrauben 21a, 21b, so dass wie in Fig. 8 gezeigt, die linken oberen 13c und unteren Spalte 13a verengt sind und die linke obere Zunge 16b nach oben und die linke untere Zunge 16a nach unten verformt ist. Die linken Auflagenteilen 8a, 8b werde weiter voneinander beabstandet. An der rechten Spannbacke 7 werden die Kegelschrauben 21a, 21b beide herausgedreht, und die beiden Zungen 17a, 17b verformen sich aufeinander zu. Das Rohr 3 wird nach links verrückt. Fig. 7 shows the tensioner with turned left taper bolts 19a, 19b and screwed right taper bolts 21a, 21b, so that as in Fig. 8 4, the left upper 13c and lower gaps 13a are narrowed, and the upper left tongue 16b is deformed upward and the lower left tongue 16a is deformed downward. The left support parts 8a, 8b will be spaced further apart. On the right clamping jaw 7, the conical screws 21a, 21b are both unscrewed, and the two tongues 17a, 17b deform towards each other. The tube 3 goes crazy to the left.

Fig. 9 und Fig. 10 zeigen die Spannvorrichtung mit diagonal betätigten Kegelschrauben 19a, 21 b, die rechte obere Kegelschraube 21b ist ausgedreht, während die linke untere Kegelschraube 19a eingedreht ist. Dadurch wird die linke untere Zunge 16a nach oben verformt, während sich die rechte obere Zunge 17b ebenfalls nach oben verformt. Durch die Veränderung der beiden prismatischen Auflagen rückt das eingespannte Rohr in der Spannstellung ein Stück weit nach rechts oben. FIGS. 9 and 10 show the tensioner with diagonally actuated tapered screws 19a, 21b, the right upper tapered screw 21b is turned off while the left lower tapered screw 19a is screwed. Thereby, the left lower tongue 16a is deformed upward, while the right upper tongue 17b also deforms upward. Due to the change in the two prismatic supports, the clamped tube moves a little way to the top right in the clamping position.

Die in den Figuren 3 bis 10 gezeigten Einstellungen der Justiereinrichtung verdeutlichen den Versatz gegenüber der Nullstellung gemäß Fig. 1. In der realen Anwendung der Justiereinrichtung wird die Justierung in umgekehrter Weise durchgeführt, indem in der Position gemäß Fig. 1, in der keine Justierung vorgenommen ist, eine Probebearbeitung der Rohrenden vorgenommen wird, und danach werden beide Enden des Rohres 3 hochgenau vermessen. Eine dabei gemessene Exzentrizität wird der Nachjustierung zugrunde gelegt, so dass sich der Versatz zwischen Rohrmittelachse R und Sollachse S entsprechend den Einstellungen der Kegelschrauben 19a, 19b, 21a, 21b verringert und möglichst rückgängig gemacht wird. Dazu wird im Vorfeld eine Korrelationstabelle erstellt, die es ermöglicht, anhand der gemessenen Exzentrizität der Bearbeitung eines Endes eines Rohres Drehtiefen der einzelnen Kegelschrauben 19a, 19b, 21 a, 21 b anzugeben, um die Exzentrizität möglichst vollständig zu eliminieren.The in the FIGS. 3 to 10 shown settings of the adjustment illustrate the offset from the zero position in accordance Fig. 1 , In the real application of the adjusting device, the adjustment is carried out in the reverse manner, in accordance with the position Fig. 1 in which no adjustment is made, a trial processing of the tube ends is made, and then both ends of the tube 3 are measured with high accuracy. An eccentricity measured in this case is taken as the basis for the readjustment, so that the offset between the pipe center axis R and the setpoint axis S is reduced in accordance with the settings of the conical bolts 19a, 19b, 21a, 21b and, if possible, reversed. For this purpose, a correlation table is created in advance, which allows using the measured eccentricity of the processing of an end of a tube rotation depths of the individual cone screws 19a, 19b, 21 a, 21 b indicate in order to eliminate the eccentricity as completely as possible.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
ZentrischspannerCentric clamping
22
ZentrischspannerCentric clamping
33
Rohrpipe
66
Spannbackejaw
77
Spannbackejaw
8a8a
Prismatische AuflagenteilePrismatic support parts
8b8b
Prismatische AuflagenteilePrismatic support parts
9a9a
Prismatische AuflagenteilePrismatic support parts
9b9b
Prismatische AuflagenteilePrismatic support parts
1111
Spannbackejaw
1212
Spannbackejaw
13a13a
Spaltecolumn
13b13b
Spaltecolumn
13c13c
Spaltecolumn
14a14a
Spaltecolumn
14b14b
Spaltecolumn
14c14c
Spaltecolumn
16a16a
Zungetongue
16b16b
Zungetongue
17a17a
Zungetongue
17b17b
Zungetongue
19a19a
Kegelschraubecone screw
19b19b
Kegelschraubecone screw
21a21a
Kegelschraubecone screw
21b21b
Kegelschraubecone screw
22a22a
SpannbackenrahmenJaw frame
22b22b
SpannbackenrahmenJaw frame
23a23a
SpannbackenrahmenJaw frame
23b23b
SpannbackenrahmenJaw frame
HH
Höhe in vertikaler RichtungHeight in vertical direction
LL
Längsrichtunglongitudinal direction
RR
RohrmittelachseTube central axis
SS
SollmittelachseTarget central axis
VV
Verfahrrichtungtraversing

Claims (6)

  1. A clamping device for rod-shaped profiled elements (3) having a substantially circular cross section
    and having a central axis (R) which runs along a longitudinal direction (L) of the rod-shaped profiled element (3), and having at least two centering clamps (1, 2) distanced from each other along a theoretical central axis (S),
    and having at least two opposing clamping cheeks (6, 7, 11, 12) that are centrally movable between a clamping position and a release position in a moving plane arranged transversely to the theoretical central axis (S), which cheeks each have a support and jointly surround the rod-shaped profiled element (3) in the clamped position and align the central axis (R) of the profiled element along the theoretical central axis (S), characterized in that a shape of the supports can be changed by an adjustable adjusting device which reduces an offset of the theoretical central axis (S) from the central axis (R) of the profiled element in the clamped position and the adjusting device comprises at least one spacer structural component that can be adjustably changed in width and that is insertable in an associated slot (13a, 13b, 13c, 14a, 14b, 14c) so as to rest on slot walls and in that
    each of the clamping cheeks (6, 7, 11, 12) has at least three adjacently arranged slots (13a, 13b, 13c, 14a, 14b, 14c) and the slots (13a, 13b, 13c, 14a, 14b, 14c) extend in a longitudinal direction (L) of the clamped-in, rod-shaped profiled element (3) over the entire length of the clamping cheek (6, 7, 11, 12) and form at least one deformable tongue (16a, 16b, 17a, 17b) between themselves on which tongue a partial support (8a, 8b, 9a, 9b) is formed.
  2. The clamping device according to Claim 1,
    characterized in that an offset of the central axis (R) of the clamped-in profiled element (3) is adjustable in all directions in the moving plane by means of the adjusting device.
  3. The clamping device according to Claim 1,
    characterized in that each of the clamping cheeks (6, 7, 11, 12) has three slots (13a, 13b, 13c, 14a, 14b, 14c) and at least two adjacently arranged tongues (16a, 16b, 17a, 17b) that are separated from each other by a slot (13a, 13b, 13c, 14a, 14b, 14c) and have a partial support (8a, 8b, 9a, 9b).
  4. The clamping device according to Claim 1, 2 or 3,
    characterized in that the tongues (16a, 16b, 17a, 17b) of a centering clamp (1, 2) are adjustable by the adjusting device in a manner coordinated with each other.
  5. The clamping device according to Claim 1,
    characterized in that each of the clamping cheeks (6, 7, 11, 12) has at least three slots (13a, 13b, 13c, 14a, 14b, 14c) and in that spacer structural components are let into a second following slot (13a, 13b, 13c, 14a, 14b, 14c).
  6. The clamping device according to one of the aforementioned claims,
    characterized in that at least one of the supports is constructed as a prismatic support.
EP10805401.6A 2009-12-14 2010-12-08 Clamping device for rod-shaped profiled elements Active EP2512743B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009058036A DE102009058036B3 (en) 2009-12-14 2009-12-14 Clamping device for bar-shaped profiles
PCT/DE2010/001433 WO2011072644A1 (en) 2009-12-14 2010-12-08 Clamping device for rod-shaped profiled elements

Publications (2)

Publication Number Publication Date
EP2512743A1 EP2512743A1 (en) 2012-10-24
EP2512743B1 true EP2512743B1 (en) 2015-07-29

Family

ID=43734811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10805401.6A Active EP2512743B1 (en) 2009-12-14 2010-12-08 Clamping device for rod-shaped profiled elements

Country Status (7)

Country Link
US (1) US8851429B2 (en)
EP (1) EP2512743B1 (en)
JP (1) JP5584310B2 (en)
CA (1) CA2784072C (en)
DE (1) DE102009058036B3 (en)
ES (1) ES2550927T3 (en)
WO (1) WO2011072644A1 (en)

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Also Published As

Publication number Publication date
WO2011072644A1 (en) 2011-06-23
JP5584310B2 (en) 2014-09-03
US8851429B2 (en) 2014-10-07
US20120241586A1 (en) 2012-09-27
CA2784072A1 (en) 2011-06-23
DE102009058036B3 (en) 2011-04-14
JP2013513489A (en) 2013-04-22
CA2784072C (en) 2015-11-03
ES2550927T3 (en) 2015-11-13
EP2512743A1 (en) 2012-10-24

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