EP3892396B1 - Drahtvorschubausrüstung - Google Patents

Drahtvorschubausrüstung Download PDF

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Publication number
EP3892396B1
EP3892396B1 EP21161304.7A EP21161304A EP3892396B1 EP 3892396 B1 EP3892396 B1 EP 3892396B1 EP 21161304 A EP21161304 A EP 21161304A EP 3892396 B1 EP3892396 B1 EP 3892396B1
Authority
EP
European Patent Office
Prior art keywords
wire
rollers
diameter
roller
drive roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP21161304.7A
Other languages
English (en)
French (fr)
Other versions
EP3892396A1 (de
Inventor
Davide CIBECCHINI
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.)
Sacma Limbiate SpA
Original Assignee
Sacma Limbiate SpA
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Filing date
Publication date
Application filed by Sacma Limbiate SpA filed Critical Sacma Limbiate SpA
Publication of EP3892396A1 publication Critical patent/EP3892396A1/de
Application granted granted Critical
Publication of EP3892396B1 publication Critical patent/EP3892396B1/de
Active 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
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • B21F23/002—Feeding means specially adapted for handling various diameters of wire or rod

Definitions

  • the present invention relates to an equipment for feeding wire, especially to a so-called roller wire "drawing" device.
  • EP 2772925 on which the preamble of claim 1 is based, discloses another equipment.
  • the equipment shows (at least) a couple of opposed rollers, equipped with a circumferential groove, among which a wire to be fed is being passed through. At least one of the rollers is powered by a controllable motor drive, so to determine the desired motion law for the intermittent wire feeding.
  • the lower wire is kept fixed, while the upper one is movable in the direction of the other one by means of an actuator.
  • a suitable pressure that is high enough to guarantee the regular friction drive, without slipping, but not higher than a threshold, that could determine an undesired deformation or local yield of the wire instead.
  • the circumferential groove of the rollers shows a semi-circular section of the radius equal to the one of the circular section of the wire, being extended on a circumference arc close to 180°: in this way, as it is understandable, the roller groove surface perfectly fits the wire surface (the upper half in the groove of In this way it is possible to achieve a high friction surface, that does not lead to an excessive increase of the adhesion surface and there are no risks of local yield of the wire.
  • FIG. 1 an outline scheme of two couples of drive rollers R1 and R2 in a wire feeding unit is shown, in jargon called even wire "drawing" equipment.
  • the drive rollers R1 and R2 are assembled in a counter direction one another and they show a circumferential groove (not shown in fig. 1 ), in which the wire is clamped.
  • a wire is driven in a feeding direction D (from right to left in fig. 1 ) with a constant or intermittent speed, depending on the control expected on the drive motor(s) of one or more of the rollers R1 and R2.
  • the two opposed rollers R1 and R2 of each couple are pushed with a certain strength F1 and F2 in the direction one towards the other, so to create enough pressure on the surface of the inserted wire and to assure a friction drive evenness.
  • a circumferential groove G of each drive roller does not show a section being perfectly semi-circular as in the prior art, but rather an elliptical section ( fig. 2 ) with the greater axis being parallel to the rotation axis of the roller.
  • An elliptical section allows the wire portion to be advantageously received, having an intermediate diameter between the minimal and the maximal one of the elliptical sections.
  • the axis greater and smaller length, respectively, of the elliptical geometrical figure are meant, that define the groove section.
  • the elliptical section of the groove G having a greater diameter D m1 and a smaller diameter D m2 may be effectively used with wire diameters within a maximum range from 50-82% D m1 to 85-97% D m2 , that represents a maximum compatibility range of the groove G of the roller couple.
  • the wire diameter within this range may potentially all be hold back by the grooves G of two opposed rollers, with a sufficient friction strength to achieve an effective drive, without having to increase too much the compressive strength among the opposed rollers.
  • the wire is being hold back into the groove in a spot (therefore overall, in two spots of the two opposed grooves).
  • rollers according to the invention may therefore be used for a series of wires that have a diameter being within the compatibility range without having to substitute the rollers at any article change.
  • the wire material is particularly ductile and soft, for example copper or aluminium, it will be necessary to keep the support pressure of the rollers lower than the reduced thresholds, to avoid a local deformation, invalidating the correct drive. In these cases, it is preferable to adopt shaped rollers.
  • the circumferential grooves of the rollers have a lower depth compared to the lower semi-diameter of the related elliptical geometrical figure, particularly lower than 4% of the smaller diameter D m2 . Therefore, in the position where the two perimetral profiles of the opposed rollers R1 and R2 are tangent one another (as in figures 2 and 3A ), the two coupled grooves do not form a close elliptical geometrical figure.
  • the roller with the compromise diameter can receive the minimal and the maximal diameter of a selected wire in the range of compatibility, depending on the reference limit of pressure on that section of chosen wire and on the material of the same wire, in this way avoiding the substitution of the rollers.
  • both the opposed rollers are movable in the direction of the respective axis.
  • the lower roller R1 is movable, too, in the direction of the upper roller R2.
  • the movement of the lower roller R1 - i.e. the roller without the pressure actuator - is preferably achieved by a non-reversible transmission W (see fig. 5A ), so to realize a fine adjustment of the roller position, but at the same time to keep it blocked in position under the action of the opposed roller R2, that is pushed with the desired pressure.
  • the movement of the kinematic motion can be assured by an electric motor M T controlled by a control panel.
  • clamping means are provided, that keep the lower adjustable roller R1 in position during the operation of the wire drawing.
  • a casing 1 supports on its outer side two couples of drive rollers R1 and R2.
  • the respective rotation axis of the rollers R1 and R2 are supported and adjusted by means of a transmission housed inside the casing 1.
  • a rotation actuator e.g. an electric motor M R (brake F r ) is connected to a control unit, that determines the motion law according to the feeding needs of a wire F.
  • the rotation actuator rotates at least one of the rollers of each couple of rollers R1 and R2.
  • each couple of rollers at least one pressure movable roller (e.g. the upper roller R2) is provided, that is assembled so to be approachable to a strike drive roller (e.g. the lower one R1) by means of an actuator P, the expresses an adjustable strength of the respective roller R2 against the striker drive roller R1.
  • a pressure movable roller e.g. the upper roller R2
  • a strike drive roller e.g. the lower one R1
  • the pressure mechanism includes a controllable pressure actuator P for each couple of rollers, that pushes the rotation axis of the upper movable roller R2 towards the lower striker drive roller R1 by means of cinematic levers 3.
  • the rotation axis of the upper rollers may be assembled, e.g., on a saddle- or bushing-like support T 2 , that is vertically displaced along an integral guide towards the casing 1 by means of the linear actuators P, for example in opposition to an elastic striker element (not shown).
  • the striker drive rollers R1 are movably assembled by means of an alignment actuator M T , W.
  • the alignment actuator can act on the rotation axis of the striker rollers independently from the pressure actuators P, displacing them and then fixing them in a predetermined position for each diameter of selected wire.
  • twisting joints GT1, GT2 to compensate the misalignments are provided: as in fact the rollers are displaced by means of the respective actuators, the twisting joints keep the couple connection with the motors but allow a displacement from a reference position.
  • a wire guiding device 4 is provided - divided into many portions, before, after and among the rollers - that has the function of guiding the wire F along a flat surface that correctly transfers it towards the next working station, i.e. along its sliding axis.
  • the wire guiding device 4 is aligned with the symmetry axis between the opposed grooves of the couples of rollers R1 and R2.
  • the wire drawing equipment of the invention perfectly carries out the aims expressed in the preamble. Indeed, it is possible to use the same set of rollers with a variety of wires having a different diameter, within the range of compatibility, depending on the specific form of the circumferential grooves of the rollers. By the movable assembling of both the rollers of each couple of rollers, it is furthermore possible to advantageously keep the wire always aligned and centred on the same feeding axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Insulated Conductors (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Metal Extraction Processes (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)

Claims (4)

  1. Einrichtung zur Zufuhr von Draehte an Bearbeitungsstellen, die mindestens ein Paar gegenüberstehender mit einer umlaufenden Nut (G) versehenen Antriebsrollen (R1, R2) umfassen, das mindestens ein Paar gegenüberstehender Antriebsrollen (R1, R2) umfasst eine bezüglich einer Schlagantriebsrolle (R1) mittels eines Druckstellgliedes (P) beweglich aufgebaute Druckantriebsrolle (R2), die Schlagantriebsrolle (R1) sei in die Richtung der Druckantriebsrolle (R2), um in Stellung gebracht zu werden, und um eine feste Schiebeachse der Draehte, auch bei einer Änderung des Durchmessers der zuzuführenden Draht, aufrechtzuhalten, beweglich aufgebaut;
    dadurch gekennzeichnet, dass die Schlagantriebsrolle (R1) mittels einem in einspannbare Lage zu bringende Ausrichtungsstellglied (MT, W) beweglich aufgebaut ist.
  2. Einrichtung nach Anspruch 1, wobei der Ausrichtungsstellglied einen irreversiblen Antrieb (W) umfasst.
  3. Einrichtung nach Anspruch 1 oder 2, wobei eine mit der Schiebeachse fluchtende Kabelführungsvorrichtung (4) auch vorgesehen ist.
  4. Einrichtung nach einem der vorhergehenden Ansprüche, wobei die Nut (G) eine mit elliptischem Abschnitt geformten Kontur hat, die einen größeren Durchmesser (Dm1) und einen kleineren Durchmesser (Dm2), um zur Aufnahme von Kabeln mit einem im Toleranzbereich von 50-82% für den größeren Durchmesser bis zu 85-97% für den kleineren Durchmesser eingeschlossenen Durchmesser geeignet zu sein, hat, und dass jede umlaufende Nut (G) eine Tiefe hat, die weniger als die Hälfte des kleineren Durchmessers (Dm2), insbesondere weniger als 4% der Hälfte des kleineren Durchmessers (Dm2), ist.
EP21161304.7A 2020-04-08 2021-03-08 Drahtvorschubausrüstung Active EP3892396B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000007474A IT202000007474A1 (it) 2020-04-08 2020-04-08 Apparecchiatura di alimentazione di un filo metallico

Publications (2)

Publication Number Publication Date
EP3892396A1 EP3892396A1 (de) 2021-10-13
EP3892396B1 true EP3892396B1 (de) 2022-12-14

Family

ID=71170744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21161304.7A Active EP3892396B1 (de) 2020-04-08 2021-03-08 Drahtvorschubausrüstung

Country Status (4)

Country Link
EP (1) EP3892396B1 (de)
ES (1) ES2936021T3 (de)
IT (1) IT202000007474A1 (de)
PL (1) PL3892396T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114798941B (zh) * 2022-03-30 2023-10-03 大族激光科技产业集团股份有限公司 牵引装置及加工设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001210154A (ja) * 2000-01-31 2001-08-03 Shin Meiwa Ind Co Ltd 電線自動交換装置
ITMI20100734A1 (it) 2010-04-29 2011-10-30 Sacma Limbiate S P A Pressa di deformazione con un dispositivo per l'alimentazione controllata di un filo metallico
JP5794103B2 (ja) * 2011-10-27 2015-10-14 住友電装株式会社 電線交換機構付き電線調尺装置
JP7071939B2 (ja) * 2019-03-12 2022-05-19 旭精機工業株式会社 線材送給装置

Also Published As

Publication number Publication date
IT202000007474A1 (it) 2021-10-08
PL3892396T3 (pl) 2023-03-13
ES2936021T3 (es) 2023-03-13
EP3892396A1 (de) 2021-10-13

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