EP0473739B1 - Drahtrichtvorrichtung - Google Patents

Drahtrichtvorrichtung Download PDF

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Publication number
EP0473739B1
EP0473739B1 EP91905046A EP91905046A EP0473739B1 EP 0473739 B1 EP0473739 B1 EP 0473739B1 EP 91905046 A EP91905046 A EP 91905046A EP 91905046 A EP91905046 A EP 91905046A EP 0473739 B1 EP0473739 B1 EP 0473739B1
Authority
EP
European Patent Office
Prior art keywords
rotor
wire
jack
central guide
attached
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91905046A
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English (en)
French (fr)
Other versions
EP0473739A1 (de
Inventor
Pierre-Louis Piguet
Peter Meier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Esco SA
Original Assignee
Esco SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Esco SA filed Critical Esco SA
Priority to AT91905046T priority Critical patent/ATE90238T1/de
Publication of EP0473739A1 publication Critical patent/EP0473739A1/de
Application granted granted Critical
Publication of EP0473739B1 publication Critical patent/EP0473739B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening

Definitions

  • the present invention relates to a device for dressing a rigid metal wire, in particular at the entrance to a machining machine, comprising a frame on which are mounted means for holding this wire, a rotor coupled to means of drive in continuous rotation, this rotor being provided with an axial conduit traversed longitudinally by the wire, a reciprocating drive means arranged to produce a relative longitudinal movement between the rotor and the wire, a movable central guide crossed by the wire and mounted in the rotor so as to be moved transversely relative to the axial duct, between a substantially centered position and an eccentric position, eccentricity control means arranged to move the central guide by means of a pressure fluid during rotation of the rotor, and stationary guides traversed by the wire and disposed in the axial duct on either side of the central guide.
  • the material is often supplied in the form of a wire delivered in a ring from which it is unwound to penetrate longitudinally into the machine.
  • a preliminary straightening of the wire is necessary to ensure the straightness of the finished part.
  • it is carried out by a dressing device installed at the entrance to the machine and operating intermittently, after each advance of the wire, for the manufacture of a new part.
  • the term "wire” used here can designate a metallic element with a circular or non-circular profile and relatively rigid, its transverse dimensions generally being of the order of several millimeters and possibly ranging up to approximately 10 to 12 mm.
  • the invention relates to a rotary type rectifier, in which the wire is arranged substantially along the axis of a rotor generally containing five guides, namely a central guide movable transversely so as to deform the wire and two pairs of stationary guides supporting the wire on either side of the central guide.
  • Dressing is obtained in a known manner by a combination of the eccentricity of the central guide, the rotation and the relative displacement of the rotor relative to the wire or vice versa. These movements cause an inflection with helical propagation in the wire, which deforms it beyond the elastic limit to an extent suitable for it to return elastically to a rectilinear form.
  • the amplitude of the eccentricity and the distance between the guides must be adapted to the dimensions and the mechanical characteristics of the different wires to be treated.
  • DE-A-2 707 970 describes an improvement of this device, where said control mechanism is actuated by a pneumatic cylinder, while the rotor rotates, in particular to return the guide to the centered position if the advance of the wire stops for some reason.
  • this pneumatic control is not intended to perform operating cycles with progressive displacement of the central guide. Besides, the device is intended to work continuously and not in cycles.
  • the object of the present invention is to provide a device making it possible to substantially avoid the drawbacks mentioned above, thanks to a simple and compact construction, making it possible to control the central guide in an easy and precise manner.
  • the invention provides a device of the type indicated in the preamble, characterized in that the reciprocating drive means comprises a first hydraulic cylinder, and in that the eccentricity control means comprise a second hydraulic cylinder which is hydraulically coupled to the first cylinder so as to operate at a speed dependent on that of the first cylinder.
  • the rotor is mounted by bearings on a carriage movable on the frame in the longitudinal direction of the wire and coupled to the first cylinder.
  • the central guide of the device comprises a support sliding radially in the rotor and provided with a support member at its end furthest from the axis of the rotor
  • the eccentricity control means comprise a sliding bush , mounted on the periphery of the rotor so as to rotate with it and provided with an axially inclined bearing surface, against which said bearing member is applied
  • said inclined bearing surface may be formed by a removable element fixed to the sliding sleeve and covering a radial bore in which the support is mounted sliding from the central guide.
  • said support member of the sliding support comprises a roller rolling on the inclined support surface, and the opposite end of said support is supported on a spring tending to keep the roller applied against said surface.
  • the eccentricity control means comprise a rotary sliding block, mounted around the sliding bushing by means of at least one bearing, this block being coupled to the second cylinder and cooperating with stops defining said positions of the central guide.
  • the rotor On each side of the central guide, the rotor may have an axial bore in which a tubular sleeve containing at least two stationary guides can be removably mounted, from a corresponding end of the rotor.
  • each guide has a guide barrel mounted inside a bearing
  • each of the tubular sleeves has a cylindrical axial bore
  • the bearings of the stationary guides are inserted into said bore of the sleeve and are held axially in positions. selected by means of interchangeable tubular spacers.
  • the hydraulic cylinders are double acting and said second cylinder, controlling the central guide, comprises two opposite chambers which are connected alternately, by means of an electrically controlled reversing valve, to an outlet of the first cylinder and a fluid return line, so that the speeds of the two cylinders are proportional to each other.
  • Said outlet of the first cylinder can be connected to a return line through a spring valve allowing said fluid flow to pass when the stroke of the second cylinder is blocked by a stop.
  • the device comprises means for measuring the speed of the rotor and for adjusting the flow of fluid actuating the first cylinder as a function of the speed of the rotor.
  • Figs. 2 and 3 show the main part of the dressing device 5, namely that which is carried by the carriage 6.
  • the carriage 6 comprises a chassis 10 fitted with sliding bearings 11 in order to be able to move back and forth on slides 12 fixed to the frame 1, by means of a double-acting hydraulic advance cylinder 13, driving a stud 14 fixed to the chassis 10.
  • This chassis carries a rotor 15 of axis 16, by means of two bearings 17, and an electric motor 18 driving in continuous rotation the rotor 15 by means of a pulley transmission 19, 20 and toothed belt 21.
  • the pulley 20 is fixed to the rotor 15 by means of a key and a screwed ring 22 provided with notches cooperating with a detector 23 to provide a signal representative of the speed of rotation of the rotor 15.
  • Each sleeve 28, 29 is provided with a cylindrical axial bore in which the guides 25 are wedged by means of tubular spacers 34 to 36 between a stop ring 37 and a nut 38 open at its center .
  • Each guide 25 comprises a guide barrel 40 provided with an orifice suitable for the section of the wire. This barrel is mounted in the inner ring of a bearing 41, the outer ring of which is adjusted in the corresponding sleeve 28, 29 and clamped between the spacers.
  • any change in the position or the type of stationary guides 25 in the dressing device can be done very quickly, since it suffices to unscrew the sleeves 28 and 29 and replace them with two other sleeves fitted beforehand with the appropriate guides. . In this way, all the positioning and centering operations of the stationary guides can be done outside the rotor.
  • stops 63 and 64 act directly at the level of the diving cylinder 62 has the advantage of avoiding any transmission of stop forces and of sparing the mechanical elements installed on the rotor.
  • the stop 64 can be adjusted while the rotor is rotating.
  • FIGS. 2 and 3 a distinction is also made between the inlet and outlet connections 66, 67 of the diving cylinder 62, for the connection of flexible hydraulic lines due to the stroke of the carriage 6, which is generally of the order 100 mm.
  • the diagram in fig. 4 shows how the advance cylinder 13 and the diving cylinder 62 are hydraulically coupled so as to operate at synchronous speeds during a wire straightening cycle.
  • the advance cylinder 13, ensuring the axial movement of the carriage 6, has inlet and outlet connections 70 and 71 which are connected to a pipe 72 for supplying pressurized fluid and to a pipe 73 for returning the fluid , through an inverting solenoid valve 74, a flow limiter 75 and, on the side of the connection 71 of the jack 13, two spring-loaded valves 76 and 77 mounted in opposition and calibrated at a pressure corresponding to approximately half of the supply pressure in line 72.
  • the hydraulic diagram shows the various organs in the rest position, before a wire straightening cycle.
  • a throttle 81 connected to the inlet 70 of the jack is adjusted as a function of the speed of the rotor in order to adjust the speed of movement of the jacks, while the other throttle 82 is open to 100%.
  • the cylinders 13 and 62 are in abutment (on the left in the diagram in FIG. 4).
  • the solenoid valve 74 is activated, so that pressurized fluid enters the jack 13 through the connector 70 and that fluid exits through the fitting 71.
  • this outgoing fluid is transmitted to the inlet 66 of the diving cylinder 62 and therefore actuates the latter in the direction of arrow C at a speed proportional to that of the cylinder 13, that is to say that the central guide is offset linearly with respect to the movement of the carriage 6.
  • the diving cylinder 62 arrives in abutment (abutment 64, fig. 3) the fluid leaving the jack 13 returns through the valve 76.
  • the central guide is returned to its centered position by deactivating the valve 78, so that the fluid leaving the connection 71 of the cylinder 13 enters the connection 67 of the cylinder 62 and actuates the latter. ci in the opposite direction to C, always at a speed proportional to that of the jack 13. Then, to return the carriage to its starting position, the valve 74 is deactivated so that it returns to the position shown in the figure and the pressurized fluid is transmitted to the connection 71 of the cylinder 13.
  • the cylinder 62 having already arrived in abutment, it no longer moves and the central guide 26 remains in the centered position.
  • the throttle 82 makes it possible to adjust the return speed of the carriage 6.
  • valve 78 is directly supplied with pressure at its inlet 84. It is therefore possible to control the diving of the central guide as if the two cylinders 13 and 62 were decoupled. However, the diving speed should not be too high, as the wire would be badly drawn. This is why there is provided the valve 80 which is activated by the pressure at the outlet of the throttle 82, so as to reduce the flow of the fluid. In normal operation, the valve is deactivated by the pressure delivered by the connection 71 of the cylinder 13.
  • the invention makes it possible to produce a dressing device having a relatively simple construction and a reduced bulk, thanks to the judicious arrangement of the elements.
  • the hydraulic control is very simple and allows without difficulty to synchronize the movements of advance and diving of the central guide in order to ensure an optimal straightening of the wire.
  • the operations of preparing and adjusting the device for straightening a given type of wire are very simplified compared to known devices, thanks to the elimination of manual centering of the material and the possibility of preparing the stationary guides outside the machine. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Wire Processing (AREA)

Claims (10)

  1. Vorrichtung zum Richten eines starren metallischen Drahtes, insbesondere eines Drahtes am Einlauf in einer Bearbeitungsmaschine, bestehend aus:
    - einem Gestell (1), auf dem Einrichtungen (8) für das Halten dieses Drahtes angeordnet sind;
    - einem Rotor (15), der mit Antriebseinrichtungen für eine dauernde drehende Bewegung gekoppelt ist, wobei dieser Rotor mit einem axialen Kanal (24), der von dem Draht in Längsrichtung durchquert wird, versehen ist;
    - einer Antriebseinrichtung für eine Hin- und Herbewegung, um zwischen dem Rotor (15) und dem Draht (3) eine verhältnismäßige Bewegung in Längsrichtung zu erzeugen;
    - einer beweglichen mittleren Führung (26), die von dem Draht durchquert und in dem Rotor derart eingebaut ist, um gegenüber dem axialen Kanal in Querrichtung zwischen einer im wesentlichen zentrierten Stellung und einer exzentrischen Stellung versetzt zu werden;
    - Steuereinrichtungen für eine Versetzung des Mittelpunktes bzw. für eine Exzentrizität, die ausgelegt sind, um die mittlere Führung (26) mit Hilfe des Druckes eines Mediums während der Drehbewegung des Rotors zu verstellen, und
    - feststehende Führungen (25), die von dem Draht durchquert und in dem axialen Kanal auf beiden Seiten der mittleren Führung eingebaut werden,
    dadurch gekennzeichnet, daß die Antriebseinrichtung für eine Hin- und Herbewegung einen ersten hydraulischen Zylinder (13) enthält und daß die Steuereinrichtungen für die Exzentrizität einen zweiten hydraulischen Zylinder (62) enthalten, der mit dem ersten Zylinder (13) derart auf hydraulische Weise gekoppelt ist, um bei einer Geschwindigkeit zu arbeiten, die von der Geschwindigkeit des ersten Zylinders abhängt.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß der Rotor (15) mit Hilfe von Lagern (17) auf einem Schlitten (6) angeordnet ist, der in der Längsrichtung des Drahtes (3) auf dem Gestell beweglich ist und mit dem ersten Zylinder (13) gekoppelt ist.
  3. Vorrichtung nach Anspruch 1, bei der die mittlere Führung (26) einen Support (44) enthält, der in dem Rotor radial gleitet und an seinem Ende, das am entferntesten von der Achse (16) des Rotors liegt, mit einer Abstützung (50) versehen ist und bei der die Steuereinrichtungen für die Exzentrizität eine Gleitbuchse (52) enthalten, die auf dem Umfang des Rotors derart angeordnet ist, daß sie sich mit dem Rotor dreht und mit einer Abstützfläche (51), die axial geneigt ist, versehen ist, gegen die die besagte Abstützung angelegt wird,
    dadurch gekennzeichnet, daß die besagte geneigte Abstützfläche (51) aus einem abnehmbaren Teil (54) gebildet wird, der an der Gleitbuchse (12) befestigt ist, und eine radiale Bohrung (45) abdeckt, in der der gleitende Support (44) der mittleren Führung eingebaut ist.
  4. Vorrichtung nach Anspruch 3,
    dadurch gekennzeichnet, daß die besagte Abstützung des gleitenden Supports (44) eine Rolle (50), die auf der geneigten Abstützfläche läuft, enthält, und daß das entgegengesetzte Ende des besagten Supports (44) auf einer Feder (48) abgestützt ist, die danach strebt, die Rolle, die gegen die besagte Fläche (51) angelegt ist, zu halten.
  5. Vorrichtung nach Anspruch 3,
    dadurch gekennzeichnet, daß die Steuereinrichtungen für die Exzentrizität einen drehenden Gleitblock (56) enthalten, der um die Gleitbuchse mit Hilfe von mindestens einem Wälzlager (57) angeordnet ist, wobei dieser Block mit dem zweiten Zylinder (62) gekoppelt ist und mit Anschlägen (63,64) zusammenwirkt, die die besagten Stellungen der mittleren Führung bestimmen.
  6. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß auf jeder Seite der mittleren Führung (26) der Rotor (15) eine axiale Bohrung enthält, in der eine rohrförmige Muffe (28,29), die mindestens zwei feststehende Führungen (25) enthält, abnehmbar von einem entsprechenden Ende des Rotors aus angeordnet ist.
  7. Vorrichtung nach Anspruch 6,
    dadurch gekennzeichnet, daß jede Führung (25,26) eine Führungshülse (40,42), die innerhalb eines Wälzlagers (41,43) eingebaut ist, enthält, daß jede der rohrförmigen Muffen (28,29) eine axiale zylindrische Bohrung besitzt und daß die Wälzlager (41) der feststehenden Führungen in der besagten Bohrung der Muffe eingesetzt sind und mit Hilfe von auswechselbaren rohrförmigen Querstücken (34,35,36) in jeweiligen ausgewählten Stellungen axial gehalten sind.
  8. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß die hydraulischen Zylinder (13,62) doppeltwirkend sind, und daß der besagte zweite Zylinder (62), der die mittlere Führung steuert, zwei entgegengesetzte Kammern enthält, die mit Hilfe eines Umschaltventiles (78), das elektrisch betätigt wird, mit einem Auslauf (71) des ersten Zylinders (13) und mit einer Rücklaufleitung (79) für das Medium abwechselnd verbunden sind, so daß die Geschwindigkeiten der beiden Zylinder zueinander proportional sind.
  9. Vorrichtung nach Anspruch 8,
    dadurch gekennzeichnet, daß der besagte Auslauf (71) des ersten Zylinders mit einer Rücklaufleitung (73) über eine federbelastete Klappe (76) verbunden ist, die die besagte Mediumsmenge durchfließen läßt, wenn der Hub des zweiten Zylinders (62) durch einen Anschlag (64) gesperrt ist.
  10. Vorrichtung nach Anspruch 8,
    dadurch gekennzeichnet, daß sie Einrichtungen (23,81) für die Messung der Geschwindigkeit des Rotors (15) und für die Regelung der Mediumsmenge enthält, die den ersten Zylinder (13) in Abhängigkeit von der Geschwindigkeit des Rotors betätigt.
EP91905046A 1990-03-26 1991-03-21 Drahtrichtvorrichtung Expired - Lifetime EP0473739B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91905046T ATE90238T1 (de) 1990-03-26 1991-03-21 Drahtrichtvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9003994A FR2659879B1 (fr) 1990-03-26 1990-03-26 Dispositif de dressage d'un fil metallique.
FR9003994 1990-03-26

Publications (2)

Publication Number Publication Date
EP0473739A1 EP0473739A1 (de) 1992-03-11
EP0473739B1 true EP0473739B1 (de) 1993-06-09

Family

ID=9395226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91905046A Expired - Lifetime EP0473739B1 (de) 1990-03-26 1991-03-21 Drahtrichtvorrichtung

Country Status (5)

Country Link
US (1) US5161399A (de)
EP (1) EP0473739B1 (de)
JP (1) JPH04506771A (de)
FR (1) FR2659879B1 (de)
WO (1) WO1991014522A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2463040A1 (de) 2010-12-10 2012-06-13 Wafios Ag Richtwerk zum rotierenden Richten von Draht
DE102013201551B3 (de) * 2013-01-30 2014-02-27 Wafios Ag Richtmaschine für Draht

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2708882A1 (fr) * 1993-08-10 1995-02-17 Latour Fils Sa Procédé et dispositif de dressage de fils metalliques pour machine à cambrer.
US6527056B2 (en) 2001-04-02 2003-03-04 Ctes, L.C. Variable OD coiled tubing strings
ES2346608B1 (es) * 2007-10-04 2011-08-03 Estrimec, S.L. Maquina enderezadora para alambre.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1847454A (en) * 1928-06-28 1932-03-01 Ac Spark Plug Co Wire straightener
US2172134A (en) * 1936-07-06 1939-09-05 Wright Albert Frederick James Apparatus for straightening wires and rods
DE1034576B (de) * 1954-11-16 1958-07-24 Evg Entwicklung Verwert Ges Vorrichtung zum Richten von Draehten
US3277682A (en) * 1963-08-30 1966-10-11 A H Nilson Machine Company Wire straighteners
DE2523831C3 (de) * 1975-05-30 1978-07-27 Louis, Hans, 5650 Solingen Vorrichtung zum Richten von Draht
NL7604956A (nl) * 1975-05-30 1976-12-02 Louis Hans Machine voor het richten van draden.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2463040A1 (de) 2010-12-10 2012-06-13 Wafios Ag Richtwerk zum rotierenden Richten von Draht
DE102010054111A1 (de) 2010-12-10 2012-06-14 Wafios Ag Richtwerk zum rotierenden Richten von Draht
DE102010054111B4 (de) * 2010-12-10 2013-06-13 Wafios Ag Richtwerk zum rotierenden Richten von Draht
DE102013201551B3 (de) * 2013-01-30 2014-02-27 Wafios Ag Richtmaschine für Draht

Also Published As

Publication number Publication date
WO1991014522A1 (fr) 1991-10-03
JPH04506771A (ja) 1992-11-26
EP0473739A1 (de) 1992-03-11
US5161399A (en) 1992-11-10
FR2659879B1 (fr) 1992-07-31
FR2659879A1 (fr) 1991-09-27

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