EP0003356B1 - Straightening machine for elongated work-pieces - Google Patents

Straightening machine for elongated work-pieces Download PDF

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Publication number
EP0003356B1
EP0003356B1 EP79100218A EP79100218A EP0003356B1 EP 0003356 B1 EP0003356 B1 EP 0003356B1 EP 79100218 A EP79100218 A EP 79100218A EP 79100218 A EP79100218 A EP 79100218A EP 0003356 B1 EP0003356 B1 EP 0003356B1
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EP
European Patent Office
Prior art keywords
link
lever
groove
pieces
deflection
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79100218A
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German (de)
French (fr)
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EP0003356A1 (en
Inventor
Herbert Lionel Jordan
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International Business Machines Corp
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International Business Machines Corp
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Publication of EP0003356A1 publication Critical patent/EP0003356A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/16Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means

Definitions

  • the invention relates to a straightening bench for aligning an elongated object, means being provided for oscillating deflection of at least a portion of the object, the deflection being adjustable in size.
  • Such straightening benches enable the straight bending of z. B. rod-shaped or tubular objects.
  • a device is known (US Pat. No. 3,328,995), in which the object is clamped in a row of jaws arranged one behind the other and displaceable relative to one another. Partial sections of the object to be aligned are deflected by vibrating relative movements of adjacent jaws perpendicular to the longitudinal axis. Different amplitudes of deflection are achieved by varying the effective lever arms of the driving lever system.
  • This known straightening bench is suitable for the alignment of elongated objects with a substantially constant cross-sectional profile, while in the case of profiles which are variable in the longitudinal direction, complex adjustments are required.
  • the arrangement is unsuitable for alignment processes in which the object firmly clamped at one end is to be deflected at the free end.
  • the present invention offers a simplified embodiment of a straightening bench which is adapted to the requirements and has means for oscillating, adjustable in size deflection of at least a portion of the object to be aligned, these means having a lever which is driven back and forth about an axis by drive means with a constant amplitude is pivoted here, as well as a longitudinally mounted holder for the object, which swings around a central position, and a connecting element connected to the lever and to the holder, which can be adjusted by adjusting means such that the amplitude of the deflection of the holder can be changed to zero.
  • the holder is connected to the connecting element at a pivot point
  • the lever is pivotable about a fixed point and has a groove which forms an arcuate section of a circle around the pivot point and a driving pin attached to the connecting element engages in the groove, whereby its position in the groove is determined by pivoting the connecting member via the adjusting means and thus the amplitude of the deflection, the whole in such a way that the central position of the deflection of the holder is always constant regardless of the position of the driving pin in the groove.
  • the advantages achieved by the invention are essentially to be seen in the fact that objects with unequal cross-sections, such as the print hammers of an impact printer, can be aligned and that the mechanical effort to be driven is adapted to the actual requirements. Furthermore, the invention makes it possible with simple means both to carry out a comfortable change in the maximum of the deflection taking place around a fixed reference point and to achieve a uniform reduction in the deflection amplitude from the maximum to zero.
  • a hammer 1 shows a hammer 1, one end of which is fastened in a clamping device 2 and the other end of which is fastened in a holder 3 arranged on a guide carriage, which consists, for example, of adjustable clamping jaws. As shown, the clamping can take place with the aid of a compressed air cylinder arrangement 4 or other suitable means.
  • the carriage is mounted on part of the general machine frame 5 in such a way that it can perform an oscillating movement or oscillation around a starting position indicated by the line A-A. This means that the hammer end clamped in the holder is also deflected around this line.
  • a link 7 is rotatably connected to the carriage.
  • the other end of the link 7, also rotatable, is connected at point 8 to a compressed air cylinder arrangement 9, which enables the link 7 to be deflected laterally (to the left in FIG. 1).
  • An adjustable hydraulic control device 10 controls the return of the link 7 to its initial position shown in FIG. 1, in which the link 7 and the slide with the holder 3 lie on a straight line, which is referred to hereinafter as the center line.
  • a lever 11 In order to set the connecting link 7 in a back and forth movement (up and down in FIG. 1), a lever 11 is provided. This can perform an oscillating movement around a fixed point 15, which lies on said center line. At the other end of the lever 11 there is a cam follower 12a, the cam 12 of a controller 13 follows the cam curve K. The cam controller 13 is driven by a drive device 14 and rotates continuously during the operation of the device. The left end of the lever 11 thus moves up and down (indicated by dashed lines in FIG. 1). In Fig. 2 the connection between the link 7 and lever 11 is shown. 15 with the fixed pivot point of the lever 11 is designated. It is formed by an axle stub which is firmly connected to the machine frame and engages in a hole provided in the lever 11 (indicated by dashed lines). As mentioned, the point 15 lies on the center line of the link 7 and the holder 3 defined above.
  • a driver pin 16 attached to the connecting member 7 is guided into the groove 11 a. It moves in the groove when the link 7 is deflected about the fulcrum 6 by the devices 9 and 10.
  • the hammer 1 is aligned by moving the hammer end fastened in the holder 3 of the slide back and forth around the central position A-A. It starts with a maximum vibration amplitude at which the yield strength of the hammer material is just exceeded. Then the amplitude is continuously reduced until it reaches zero and the slide comes to a standstill in the middle position.
  • these operations are carried out by first deflecting the connecting member 7 through the compressed air cylinder arrangement 9 to such an extent that the amplitude of the vibrations of the holder 3 reaches the intended maximum. Controlled by the device 10, the link 7 then moves back in the direction of its starting position. Here, the amplitude of the carriage movements is reduced continuously and finally becomes zero when link 7 has returned to the starting position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Impact Printers (AREA)

Description

Die Erfindung bezieht sich auf eine Richtbank zum Ausrichten eines länglichen Gegenstandes, wobei Mittel zur oszillierenden, in ihrer Größe verstellbaren Auslenkung wenigstens eines Abschnitts des Gegenstandes vorgesehen sind.The invention relates to a straightening bench for aligning an elongated object, means being provided for oscillating deflection of at least a portion of the object, the deflection being adjustable in size.

Derartige Richtbänke ermöglichen das Geradebiegen von z. B. stangen- oder rohrförmigen Gegenständen. Es ist eine solche Einrichtung bekannt (US Patent 3 328 995), bei der der Gegenstand in einer Reihe von hintereinander angeordneten und gegeneinander verschiebbaren Backen eingespannt wird. Durch senkrecht zur Längsachse erfolgende vibrierende Relativbewegungen benachbarter Backen werden Teilabschnitte des auszurichtenden Gegenstandes ausgelenkt. Unterschiedliche Auslenkungsamplituden werden durch Variation der effektiven Hebelarme des antreibenden Hebelsystems erzielt.Such straightening benches enable the straight bending of z. B. rod-shaped or tubular objects. Such a device is known (US Pat. No. 3,328,995), in which the object is clamped in a row of jaws arranged one behind the other and displaceable relative to one another. Partial sections of the object to be aligned are deflected by vibrating relative movements of adjacent jaws perpendicular to the longitudinal axis. Different amplitudes of deflection are achieved by varying the effective lever arms of the driving lever system.

Diese bekannte Richtbank ist geeignet für die Ausrichtung von länglichen Gegenständen mit im wesentlichen gleichbleibendem Querschnittsprofil, während bei in Längsrichtung variablen Profilen aufwendige Anpassungen erforderiich werden. Zudem ist die Anordnung ungeeignet für Ausrichtungsverfahren, bei denen der an einem Ende fest eingespannte Gegenstand am freien Ende auszulenken ist.This known straightening bench is suitable for the alignment of elongated objects with a substantially constant cross-sectional profile, while in the case of profiles which are variable in the longitudinal direction, complex adjustments are required. In addition, the arrangement is unsuitable for alignment processes in which the object firmly clamped at one end is to be deflected at the free end.

Die vorliegende Erfindung bietet eine den Erfordernissen angepaßte, vereinfachte Ausführung einer Richtbank mit Mitteln zur oszillierenden, in ihrer Größe verstellbaren Auslenkung wenigstens eines Abschnittes des auszurichtenden Gegenstandes, wobei diese Mittel einen Hebel aufweisen, der durch Antriebsmittel mit ständig gleichbleibender Amplitude um eine Achse hin- und hergeschwenkt wird, sowie eine um eine Mittellage schwingende längsgeführte Halterung für den Gegenstand, und ein mit dem Hebel und mit der Halterung verbundenes Verbindungsglied, das durch Einstellmittel derart verstellbar ist, daß die Amplitude der Auslenkung der Halterung bis auf Null verändert werden kann. Sie ist dadurch gekennzeichnet, daß die Halterung mit dem Verbindungsglied in einem Drehpunkt verbunden ist, der Hebel um einen Festpunkt schwenkbar ist und eine Nut aufweist, die einen Bogenabschnitt eines Kreises um den Drehpunkt bildet und ein am Verbindungsglied angebrachter Mitnehmerstift in die Nut greift, wobei seine Stellung in der Nut durch ein Verschwenken des Verbindungsgliedes über die Einstellmittel und damit die Amplitude der Auslenkung bestimmt wird, das Ganze derart, daß die Mittellage der Auslenkung der Halterung unabhängig von der Stellung des Mitnehmerstiftes in der Nut stets gleichbleibend ist.The present invention offers a simplified embodiment of a straightening bench which is adapted to the requirements and has means for oscillating, adjustable in size deflection of at least a portion of the object to be aligned, these means having a lever which is driven back and forth about an axis by drive means with a constant amplitude is pivoted here, as well as a longitudinally mounted holder for the object, which swings around a central position, and a connecting element connected to the lever and to the holder, which can be adjusted by adjusting means such that the amplitude of the deflection of the holder can be changed to zero. It is characterized in that the holder is connected to the connecting element at a pivot point, the lever is pivotable about a fixed point and has a groove which forms an arcuate section of a circle around the pivot point and a driving pin attached to the connecting element engages in the groove, whereby its position in the groove is determined by pivoting the connecting member via the adjusting means and thus the amplitude of the deflection, the whole in such a way that the central position of the deflection of the holder is always constant regardless of the position of the driving pin in the groove.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, daß Gegenstände mit über die Länge ungleichem Querschnitt, wie beispielsweise die Druckhämmer eines Aufschlagdruckers, ausgerichtet werden können und daß der zu treibende maschinelle Aufwand den tatsächlichen Anforderungen angepaßt ist. Ferner gestattet es die Erfindung mit einfachen Mitteln, sowohl eine bequeme Änderung des Maximums der um einen festen Referenzpunkt erfolgenden Auslenkung auszuführen, als auch eine gleichmäßige Reduktion der Auslenkungsamplitude vom Maximum auf Null zu erzielen.The advantages achieved by the invention are essentially to be seen in the fact that objects with unequal cross-sections, such as the print hammers of an impact printer, can be aligned and that the mechanical effort to be driven is adapted to the actual requirements. Furthermore, the invention makes it possible with simple means both to carry out a comfortable change in the maximum of the deflection taking place around a fixed reference point and to achieve a uniform reduction in the deflection amplitude from the maximum to zero.

Im folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstettenJen Zeichnungen näher erläutert.The invention is explained in more detail below with the aid of only one embodiment.

Es zeigt

  • Fig. 1 eine schematische Darstellung der erfindungsgemäßen Vorrichtung und
  • Fig. 2 eine perspektivische Ansicht eines Teils der in Fig. 1 gezeigten Vorrichtung im demontierten Zustand.
It shows
  • Fig. 1 is a schematic representation of the device according to the invention and
  • Fig. 2 is a perspective view of part of the device shown in Fig. 1 in the disassembled state.

Mit Hilfe der Fig. 1 werden im folgenden die Erfindung sowie ein Anwendungsbeispiel näher beschrieben. Dargestellt ist eine Richtbank zum Ausrichten individueller Druckhämmer von Aufschlagdruckern. Auf die Frage nach der Notwendigkeit des Ausrichtens solcher Hämmer wird hier nicht näher eingegangen. Es genügt die Feststellung, daß es bei solchen Hämmern darauf ankommt, daß gewisse Oberflächen parallel zueinander liegen und bestimmte Abstände aufweisen, um ein einwandfreies Arbeiten des Druckers zu gewährleisten.1, the invention and an application example are described in more detail below. A straightening bench for aligning individual print hammers of impact printers is shown. The question of the need to align such hammers is not dealt with here. Suffice it to say that with such hammers it is important that certain surfaces are parallel to one another and have certain distances between them in order to ensure that the printer works properly.

In Fig. 1 ist ein Hammer 1 gezeigt, dessen eines Ende in einer Einspannvorrichtung 2 und dessen anderes Ende in einer auf einem Führungsschlitten angeordneten Halterung 3 befestigt ist, die beispielsweise aus justierbaren Klemmbacken besteht. Die Einspannung kann, wie gezeigt, mit Hilfe einer Druckluftzylinderanordnung 4 oder anderer geeigneter Mittel erfolgen.1 shows a hammer 1, one end of which is fastened in a clamping device 2 and the other end of which is fastened in a holder 3 arranged on a guide carriage, which consists, for example, of adjustable clamping jaws. As shown, the clamping can take place with the aid of a compressed air cylinder arrangement 4 or other suitable means.

Der Schlitten ist auf einem Teil des allgemeinen Maschinenrahmens 5 derart montiert, daß er eine oszillierende Bewegung oder Schwingung um eine durch die Linie A-A gekennzeichnete Ausgangslage ausführen kann. Dies bedeutet, daß auch das in der Halterung eingespannte Hammerende um diese Linie ausgelenkt wird.The carriage is mounted on part of the general machine frame 5 in such a way that it can perform an oscillating movement or oscillation around a starting position indicated by the line A-A. This means that the hammer end clamped in the holder is also deflected around this line.

Im Punkt 6 ist ein Verbindungsglied 7 drehbar an den Schlitten angeschlossen. Das andere Ende des Gliedes 7 ist, ebenfalls drehbar, im Punkt 8 mit einer Druckluftzylinderanordnung 9 verbunden, die eine seitliche Auslenkung des Verbindungsgliedes 7 (in Fig.1 nach links) ermöglicht. Eine justierbare hydraulische Steuervorrichtung 10 kontrolliert die Rückführung des Gliedes 7 in seine in Fig. 1 dargestellte Ausgangslage, in der das Glied 7 und der Schlitten mit der Halterung 3 auf einer Geraden liegen, die im weiteren als Mittellinie bezeichnet wird.At point 6, a link 7 is rotatably connected to the carriage. The other end of the link 7, also rotatable, is connected at point 8 to a compressed air cylinder arrangement 9, which enables the link 7 to be deflected laterally (to the left in FIG. 1). An adjustable hydraulic control device 10 controls the return of the link 7 to its initial position shown in FIG. 1, in which the link 7 and the slide with the holder 3 lie on a straight line, which is referred to hereinafter as the center line.

Um das Verbindungsglied 7 in eine Hin- und Herbewegung (in Fig. 1 auf und ab) zu versetzen, ist ein Hebel 11 vorgesehen. Dieser kann eine oszillierende Bewegung um einen festen Punkt 15 ausführen, der auf der genannten Mittellinie liegt. Am anderen Ende des Hebels 11 befindet sich ein Nockenstößel 12a, der der NockenKurve 12 einer Nockensteuerung 13 folgt. Die Nockensteuerung 13 wird durch eine Antriebsvorrichtung 14 angetrieben und läuft während des Betriebs der Vorrichtung kontinuierlich um. Somit bewegt sich das linke Ende des Hebels 11 auf und ab (in Fig. 1 gestrichelt angedeutet). In Fig. 2 ist die Verbindung zwischen Verbindungsglied 7 und Hebel 11 dargestellt. Mit 15 ist der feste Drehpunkt des Hebels 11 bezeichnet. Er wird durch einen mit dem Maschinenrahmen fest verbundenen Achsstummel gebildet, der in ein im Hebel 11 vorgesehenes (gestrichelt angedeutetes) Loch eingreift. Wie erwähnt, liegt der Punkt 15 auf der oben definierten Mitttellinie des Gliedes 7 und der Halterung 3.In order to set the connecting link 7 in a back and forth movement (up and down in FIG. 1), a lever 11 is provided. This can perform an oscillating movement around a fixed point 15, which lies on said center line. At the other end of the lever 11 there is a cam follower 12a, the cam 12 of a controller 13 follows the cam curve K. The cam controller 13 is driven by a drive device 14 and rotates continuously during the operation of the device. The left end of the lever 11 thus moves up and down (indicated by dashed lines in FIG. 1). In Fig. 2 the connection between the link 7 and lever 11 is shown. 15 with the fixed pivot point of the lever 11 is designated. It is formed by an axle stub which is firmly connected to the machine frame and engages in a hole provided in the lever 11 (indicated by dashed lines). As mentioned, the point 15 lies on the center line of the link 7 and the holder 3 defined above.

In der dem Betrachter zugewandten Oberfläche des Hebels 11 befindet sich eine bogenförmige Nut 11 a. Sie bildet einen Teil eines Kreises mit dem Radius R, dessen Mittelpunkt mit dem Drehpunkt 6 zusammenfällt. Die Nut beginnt im Drehpunkt 15.In the surface of the lever 11 facing the viewer there is an arcuate groove 11 a. It forms part of a circle with the radius R, the center of which coincides with the fulcrum 6. The groove begins at fulcrum 15.

Ein am Verbindungsglied 7 angebrachter Mitnehmerstift 16 wird in die Nut 11 a geführt. Er bewegt sich in der Nut, wenn das Glied 7 durch die Einrichtungen 9 und 10 um den Drehpunkt 6 ausgelenkt wird.A driver pin 16 attached to the connecting member 7 is guided into the groove 11 a. It moves in the groove when the link 7 is deflected about the fulcrum 6 by the devices 9 and 10.

Solange sich die Druckluftzylinderanordnung 9 und somit das Glied 7 und die Halterung 3 in der in Fig. 1 gezeigten Ausgangslage befinden, wird die oszillierende Bewegung des Hebels 11 um den Punkt 15 nicht auf das Glied 7 oder die Halterung 3 übertragen. Wird jedoch das Glied 7 durch die Anordnung 9 nach links ausgelenkt, so wird der Mitnehmerstift 16 vom Festpunkt 15 wegbewegt. Je weiter der Stift von 15 entfernt wird, so größer wird die Amplitude der oszillierenden Bewegung des Stiftes 16 und damit auch die des Verbindungsgliedes 7 und der Halterung 3. Letztere wird um ihre Ausgangslage A-A hin- und herbewegt.As long as the compressed air cylinder arrangement 9 and thus the link 7 and the holder 3 are in the starting position shown in FIG. 1, the oscillating movement of the lever 11 around the point 15 is not transmitted to the link 7 or the holder 3. However, if the link 7 is deflected to the left by the arrangement 9, the driver pin 16 is moved away from the fixed point 15. The farther the pin is removed from 15, the greater the amplitude of the oscillating movement of the pin 16 and thus also that of the connecting member 7 and the holder 3. The latter is moved back and forth about its starting position A-A.

Das Ausrichten des Hammers 1 erfolgt, indem das in der Halterung 3 des Schlittens befestigte Hammerende um die Mittellage A-A hin- und herberwegt wird. Begonnen wird mit einer maximalen Schwingungsamplitude, bei der die Streckgrenze des Hammermaterials gerade überschritten wird. Dann wird die Amplitude kontinuierlich reduziert, bis sie den Wert Null erreicht und der Schlitten auf der Mittellage zum Stillstand kommt.The hammer 1 is aligned by moving the hammer end fastened in the holder 3 of the slide back and forth around the central position A-A. It starts with a maximum vibration amplitude at which the yield strength of the hammer material is just exceeded. Then the amplitude is continuously reduced until it reaches zero and the slide comes to a standstill in the middle position.

Mit der beschriebenen Anordnung werden diese Operationen ausgeführt, indem zunächst das Verbindungsglied 7 durch die Druckluftzylinderanordnung 9 gerade so weit ausgelenkt wird, daß die Amplitude der Schwingungen der Halterung 3 das vorgesehene Maximum erreicht. Gesteuert durch die Vorrichtung 10 bewegt sich dann das Glied 7 in Richtung seiner Ausgangslage zurück. Hierbei reduziert sich die Amplitude der Schlittenbewegungen kontinuierlich und wird schließlich zu Null, wenn Glied 7 in die Ausgangslage zurückgekehrt ist.With the arrangement described, these operations are carried out by first deflecting the connecting member 7 through the compressed air cylinder arrangement 9 to such an extent that the amplitude of the vibrations of the holder 3 reaches the intended maximum. Controlled by the device 10, the link 7 then moves back in the direction of its starting position. Here, the amplitude of the carriage movements is reduced continuously and finally becomes zero when link 7 has returned to the starting position.

Claims (1)

  1. Straightening machine for elongated work-pieces, with means for causing reciprocatory deflection of varying magnitude of at least a section of the work-pieces, wherein this means comprises a lever (11) which, driven by drive means, is oscillated at constant amplitude about a shaft, a guided mounting (3) for supporting the work-pieces, reciprocable about a mid-position, and a link (7), connected with the lever (11) and with the mounting (3) and adjustable through positioning means (9, 10) so that the magnitude of the deflection of the mounting can be reduced to zero, characterized in that the mounting (3) is connected to the link (7) at a pivot point (6), the lever (11) is pivoted about a fixed point and has a groove (11a) in the form of an arc of a circle about the pivot point (6), and a follower element (16), connected to the link (7) is engaged in the groove (11a), so that its position whithin the groove (11 a), and thereby the magnitude of the deflection, is determined by shift of the link (7) by positioning means (9, 10), the arrangement being such that the mid-position of the mounting (3) remains the same, irrespective of the position of the follower element (15) in the groove (11 a).
EP79100218A 1978-02-01 1979-01-25 Straightening machine for elongated work-pieces Expired EP0003356B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA296,016A CA1091955A (en) 1978-02-01 1978-02-01 Motion producing and transmitting mechanism
CA296016 1978-02-01

Publications (2)

Publication Number Publication Date
EP0003356A1 EP0003356A1 (en) 1979-08-08
EP0003356B1 true EP0003356B1 (en) 1981-11-04

Family

ID=4110664

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Application Number Title Priority Date Filing Date
EP79100218A Expired EP0003356B1 (en) 1978-02-01 1979-01-25 Straightening machine for elongated work-pieces

Country Status (5)

Country Link
EP (1) EP0003356B1 (en)
JP (1) JPS6059460B2 (en)
CA (1) CA1091955A (en)
DE (1) DE2961180D1 (en)
IT (1) IT1166594B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113927384A (en) * 2021-10-20 2022-01-14 安徽信息工程学院 Automobile parts processing operation platform

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE480457C (en) * 1929-08-02 Georg Mueller Fa Device for changing the stroke of piston pumps, etc.
DE307259C (en) *
US3328995A (en) * 1964-12-21 1967-07-04 Turner & Seymour Mfg Company Vibratory straightening machines

Also Published As

Publication number Publication date
IT7919619A0 (en) 1979-01-26
EP0003356A1 (en) 1979-08-08
JPS54113764A (en) 1979-09-05
CA1091955A (en) 1980-12-23
JPS6059460B2 (en) 1985-12-25
DE2961180D1 (en) 1982-01-14
IT1166594B (en) 1987-05-05

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