EP0100766A1 - Dispositif pour l'introduction de feuillard dans une installation de traitement de bandes - Google Patents

Dispositif pour l'introduction de feuillard dans une installation de traitement de bandes Download PDF

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Publication number
EP0100766A1
EP0100766A1 EP19830890080 EP83890080A EP0100766A1 EP 0100766 A1 EP0100766 A1 EP 0100766A1 EP 19830890080 EP19830890080 EP 19830890080 EP 83890080 A EP83890080 A EP 83890080A EP 0100766 A1 EP0100766 A1 EP 0100766A1
Authority
EP
European Patent Office
Prior art keywords
clamping
jaw
armature
magnet
strip
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.)
Granted
Application number
EP19830890080
Other languages
German (de)
English (en)
Other versions
EP0100766B1 (fr
Inventor
Gerhard Breitschopf
Günter Karner
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.)
Voestalpine AG
Original Assignee
Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0100766A1 publication Critical patent/EP0100766A1/fr
Application granted granted Critical
Publication of EP0100766B1 publication Critical patent/EP0100766B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/18—Advancing work in relation to the stroke of the die or tool by means in pneumatic or magnetic engagement with the work

Definitions

  • the invention relates to a device for pulling sheet metal strips into a strip processing system with a pull-in carriage, which has two clamping jaws for detecting the beginning of the strip, one of which can be pressed against the other.
  • pull-in carriages are usually provided, which have two clamping jaws, between which the beginning of the strip is clamped, so that the strips to be processed can be threaded into the individual system parts via the pull-in carriage. It is essential for a trouble-free operation of such a pull-in carriage that the individual belt starts are securely grasped between the clamping jaws.
  • a sufficient clamping force must therefore be exerted on the beginning of the strip via the clamping jaws, which can lead to difficulties in particular in the case of longitudinally divided sheet metal strips if the individual longitudinal strips due to a clamping pressure which is not uniformly distributed over the length of the clamping jaws or due to thickness deviations no uniform clamping can act against the individual metal strips. Since the draw-in cart with the clamped tapes has to be pulled through the tape processing system, the design of the draw-in cart must be low, which makes it difficult to apply the same clamping forces transversely to the tape longitudinal direction, i.e. over the length of the clamping jaws.
  • Clamping devices that act on the side of the clamping jaws, which are designed, for example, as eccentric drives or work with the aid of clamping wedges, allow comparatively low overall heights for the pull-in carriage, but the clamping jaws are subjected to torsion and bending, so that the clamping force distribution over the length of the clamping jaw is uneven. If the clamping force is applied via a plurality of clamping drives arranged along the clamping jaws, a corresponding distribution of the clamping force over the length of the jaw can be ensured, but with the resulting higher technical complexity, a greater overall height is necessary.
  • the invention is therefore based on the object to avoid these deficiencies and to improve a device for pulling sheet metal strips into a strip processing system of the type described in such a way that a uniform distribution of clamping force over the length of the clamping jaws can be ensured with simple means without the overall height of the Pull-in car in a disruptive manner.
  • the invention achieves the stated object in that one jaw forms the pole face of at least one magnet, the armature of which consists of the other jaw.
  • the overall height of the pull-in trolley can remain low. It only has to be ensured that the necessary clamping forces can be effective with an economical use of energy. This is ensured by the design of the press-on clamping jaw as the armature of the magnet. The attraction force of the armature to the pole faces of the magnet results in pressure forces between the beginning of the band to be clamped and the two clamping jaws, which result in corresponding frictional forces and thus a safe entrainment of the bands with the pull-in carriage, regardless of whether the metal strips are made of a ferromagnetic material exist or not.
  • a magnetic field that is uniformly distributed over the length of the jaws can be achieved, for example, with a three-legged magnet design if the legs extend in the longitudinal direction of the jaws, so that they extend over field lines closing the anchor run between the legs in the longitudinal direction of the strip.
  • the jaws should be able to be opened wide.
  • a wide jaw opening requires appropriately dimensioned magnets in order to be able to exert sufficient attractive forces for tightening the armature despite the large air gap.
  • an actuating drive preferably a cylinder drive, can be provided in a further embodiment of the invention to set the clamping jaw forming the armature of the magnet. Since this actuator only has to cope with the weight of the adjustable jaw, it can be designed to be comparatively weak. The required clamping force is ensured by the magnet that comes into effect after the clamping jaw is turned on.
  • a pull-in carriage 1 which consists of a frame 2 forming a chassis with side wheels 3 attached to the side.
  • two DC magnets 4 are used in the frame 2, which are fastened with the aid of brackets 5 and form one of two clamping jaws 6 and 7.
  • the other jaw 7 is held in two side pivot arms 8 which are pivotally mounted in two arms 9 of the frame 2. Since the pivot pin 10 engages in elongated hole-like bearing eyes 11, as indicated by dashed lines in Fig.
  • the jaw 7 can not only be rotated about the pin 10, but also moved within the bearing eyes 11, so that the jaw 7 independently of the respective sheet thickness can lay flat against the sheet to be clamped.
  • the clamping jaw 7 forms an armature 12 for the magnet 4, which closes the iron circuit of the direct current magnets 4.
  • the two magnets each have three legs 13, 14 and 15 running in the longitudinal direction of the clamping jaw 6, the excitation winding 16 being arranged on the middle leg 14.
  • the magnets 4 are excited via the connecting lines 17, the magnetic field lines run between the leg 14 on the one hand and the legs 13 and 15 on the other hand, and they close via the armature 12 when the armature is drawn from the opening position shown in full lines to the dash-dotted line Clamped position is brought.
  • Two lifting cylinders 18 are provided for this purpose, which are articulated on the frame 2 and engage the swivel arms 8. Since no clamping forces have to be applied via these lifting cylinders 18, the lifting cylinders 18 can be designed to be comparatively weak.
  • the sheet metal strip 19 inserted between the clamping jaws 6 and 7 with its beginning is clamped between the clamping jaws after excitation of the direct current magnets 4, with a uniform distribution of the clamping force in the longitudinal direction of the clamping jaws 6 and 7 due to the formation of the clamping jaws 6 and 7 as parts of a magnet. thus transversely to the longitudinal direction of the tape, since a corresponding magnetic field distribution can be enforced by the formation of the magnets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Replacement Of Web Rolls (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
EP19830890080 1982-08-02 1983-05-11 Dispositif pour l'introduction de feuillard dans une installation de traitement de bandes Expired EP0100766B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2958/82 1982-08-02
AT0295882A AT374126B (de) 1982-08-02 1982-08-02 Vorrichtung zum einziehen von blechbaendern in eine bandbearbeitungsanlage

Publications (2)

Publication Number Publication Date
EP0100766A1 true EP0100766A1 (fr) 1984-02-15
EP0100766B1 EP0100766B1 (fr) 1985-09-18

Family

ID=3543069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830890080 Expired EP0100766B1 (fr) 1982-08-02 1983-05-11 Dispositif pour l'introduction de feuillard dans une installation de traitement de bandes

Country Status (3)

Country Link
EP (1) EP0100766B1 (fr)
AT (1) AT374126B (fr)
DE (1) DE3360831D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3546573C2 (fr) * 1984-04-11 1991-03-14 Printronix, Inc. (N.D.Ges.D.Staates Delaware), Irvine, Calif., Us

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2082493A (en) * 1980-08-02 1982-03-10 Hunter Douglas Ind Bv Discharge device for apparatus for making slats for a slatted blind

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2082493A (en) * 1980-08-02 1982-03-10 Hunter Douglas Ind Bv Discharge device for apparatus for making slats for a slatted blind

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3546573C2 (fr) * 1984-04-11 1991-03-14 Printronix, Inc. (N.D.Ges.D.Staates Delaware), Irvine, Calif., Us

Also Published As

Publication number Publication date
ATA295882A (de) 1983-08-15
AT374126B (de) 1984-03-26
EP0100766B1 (fr) 1985-09-18
DE3360831D1 (en) 1985-10-24

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