EP0997242B1 - Verfahren sowie Vorrichtung zum Schneiden von Rohren - Google Patents

Verfahren sowie Vorrichtung zum Schneiden von Rohren Download PDF

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Publication number
EP0997242B1
EP0997242B1 EP99440268A EP99440268A EP0997242B1 EP 0997242 B1 EP0997242 B1 EP 0997242B1 EP 99440268 A EP99440268 A EP 99440268A EP 99440268 A EP99440268 A EP 99440268A EP 0997242 B1 EP0997242 B1 EP 0997242B1
Authority
EP
European Patent Office
Prior art keywords
blade
cutting
cut
tube
rotation
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
EP99440268A
Other languages
English (en)
French (fr)
Other versions
EP0997242A1 (de
Inventor
Jean-Marie Eberle
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.)
Eberle SA
Original Assignee
Eberle 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 Eberle SA filed Critical Eberle SA
Publication of EP0997242A1 publication Critical patent/EP0997242A1/de
Application granted granted Critical
Publication of EP0997242B1 publication Critical patent/EP0997242B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely

Definitions

  • the present invention relates to the field of cutting tubes into paper, cardboard, or synthetic material intended for the realization of boxes packaging, drums or the like, and relates to a cutting or cutting process such tubes.
  • the invention also relates to a cutting device or intersects such tubes for the implementation of this process.
  • Tubes made of paper, cardboard or synthetic material which are generally made by continuous longitudinal winding of one or more several contiguous bands and offset on a mandrel of appropriate section up to required thickness, are subsequently cut for the production of sections of identical or different lengths, depending on their final use, using a tube cutting or cutting device.
  • the tube to be cut is rotated and one or more circular knives penetrate, transversely to the longitudinal axis of the tube, into the material constituting said tube until the cut is made.
  • a counterpart called cutting mandrel which is placed in line with the knife (s).
  • the circular knives used are generally made of steel treated with high hardness and have a single or double bevel intended to facilitate their penetration into the tube to be cut.
  • the knife or knives make, at each cut, an imprint in the cutting mandrel, which has the effect of generating a significant marking after a number of cuts, this marking resulting in a groove to which corresponds, on the sections of cut tubes, an internal burr due to the tear following the action of the knife (s).
  • the knife (s) circular coming into contact with said mandrel at the end of each cutting operation, roll on said cutting mandrel and their cutting edge wears out quickly.
  • said edge crumbles and has degradations similar to tiny sawtooth, so that after a few cutting operations, the appearance of the cuts made is degraded and each cut results in dust generation.
  • the cut obtained is smooth and of very good quality.
  • the tube is rotatably mounted on a fixed cutting mandrel forming a counterpiece non-rotating and the fixed knives penetrate laterally to the longitudinal axis of the tube in the material thickness of the latter.
  • the knife (s) will heat up, however, quickly in the presence of thick tube to cut, due to friction generated.
  • the knife (s) are hunting in one direction perpendicular to the cut, which results in a cut of the tube not straight, namely strongly bevelled.
  • the object of the present invention is to overcome these drawbacks by proposing a method and a device for cutting or cutting tubes allowing obtaining cutting surfaces perfectly perpendicular to the longitudinal axis tubes and very good quality, while avoiding premature wear of the cutting knives.
  • the method of cutting or cutting tubes is characterized in that it consists in making an initial cut of the tube on a major part of its thickness by means of one or more rotary knives and make the final cut of the remaining thickness by means of said knife (s) which have made the initial cut with rotation lock of the or said knives.
  • the invention also relates to a cutting device or cuts tubes for the implementation of this process, according to claim 2.
  • FIG. 1 of the accompanying drawings shows, by way of example, a device for cutting or cutting tubes, which essentially consists of two cutting knives 1, each mounted on a pivoting knife holder lever 2 actuated by means of a jack 3, the assembly being arranged on a knife-carrying carriage 4 movable transversely to a cutting mandrel 5 carrying a tube cut 6.
  • the pivoting movement of the knife holder lever 2 is adjustable by means of a stop 7, depending on the thickness of the tube to cut or cut and the prior positioning of the knife holder carriage 4 is carried out by means of an adjustment screw 8 actuated by means of a handwheel or an operating lever 9.
  • the adjusting screw 8 is advantageously of the reverse threads, in the embodiment shown in Figure 1, which highlights works two knife holder carriages 4 each supporting a knife 1, said knives 1 being diametrically opposite with respect to the cutting mandrel 5 carrying the tube to be cut 6.
  • the cutting or cutting device can also be of a different type, i.e. have only one knife or have more of two knives.
  • the means for moving the knife-carrying carriage (s) are then adapted to the configuration chosen.
  • the process for cutting or recutting tubes is characterized in that it consists in making an initial cut of the tube 6 on most of its thickness using one or more knives rotary 1 and to make the final cut of the remaining thickness with locking in rotation of said knife (s) 1.
  • the device for implementing this method is characterized in that the cutting knife (s) 1 are rotary and cooperate with at least one means 10 for limiting their rotation for an initial duration of the cutting operation, said means 10 blocking said knife (s) 1 in the final cutting phase.
  • FIG. 2 of the accompanying drawings shows the position of the knife 1 to the end of the initial period of cutting the tube 6, i.e. the cutting with rotation of knife 1. In this position, there remains a thickness d of the total thickness e of tube 6 to be cut. This thickness d is cut while the knife 1 is set to stopping by means 10.
  • This means 10 is preferably constituted, for each knife 1, in the form of a brake shoe acting on a drum 11 integral with rotation of the knife 1 and actuated by means of a control cylinder 12 mounted on the knife holder lever 2.
  • said knife 1 on reaching dimension d corresponding to the thickness remaining to be cut in fixed position of the knife 1, is locked in position and therefore made fixed by clamping the jaw forming the means 10 on the drum 11 at by means of the corresponding jack 12.
  • the knife 1 is therefore immobilized and makes the final thickness cut d remaining in a fixed position, until it comes into contact with the cutting mandrel 5. It as a result, each knife 1 comes into contact with said mandrel 5 only on a very small portion of the periphery of its edge and that its wear, following this contact is extremely weak and limited.
  • the actuating cylinder 3 for pivoting the knife holder lever 2 or the knife holder lever 2 is provided, on the one hand, with an actuating stop for the jack 12 for controlling the means 10 for limiting the rotation of the knife 1 and, on the other part, of a retraction limit stop of the jack 3 or of the limit switch pivoting of the knife holder lever 2 in the rest position, allowing the triggering of the actuator 12 for controlling the means 10.
  • stops are advantageously adjustable stops provided with a contactor or the like starting or starting actuation of the cylinder 12, after a stroke of the cylinder 3 or a pivoting of the knife holder lever 2 corresponding to the initial duration of the cutting operation with rotation of the knife 1 or after returning to the position of rest.
  • the cutting or cutting device comprises two knives 1 diametrically opposite, so that the forces exerted on the mandrel of cuts 5 are completely balanced and that the cut made can be perfect.
  • the knife (s) 1 are advantageously mounted free in rotation on the knife holder lever 2.
  • the means 10 for limiting rotation for a period initial of the cutting operation can then be constituted, either by the means drive itself, in the form of a stepper motor or a control of impulse rotation, either by an auxiliary means of braking or setting stopping, such as a clutch-brake or the like.
  • the cutting mandrel 5 is preferably constituted by a bar fixed return 13 comprising at its distal end a fixed cutting ring 14 integral with said bar 13, this cutting ring 14 being surrounded, on the one hand, at the free end of the bar 13, of a rotating sleeve 15 mounted on a bearing ball 16 or a plain bearing and, on the other hand, on the side opposite the rotating sleeve 15, a rotating ring 17 mounted on a ball bearing 18 or a bearing.
  • the cutting ring 14 is fixed with the fixed bar 13 and does not rotate opposite of the knife (s) 1 throughout the duration of the cutting operation, that is to say both while the knives 1 are rotating and during the final cutting of the thickness d, during which said knives 1 are blocked.
  • the device according to the invention operates in the manner next :
  • Knife blocking 1 at the end of the cut, for cutting the remaining thickness d allows smoothing of the ends of the tube 6 and to prevent said knives from becoming dull by turning against the cutting mandrel 5. It follows that the cut made is straight, the rotary knives 1 not chasing not.
  • the knives 1 return to the position of departure, according to a known command sequence, and the means 10 are unlocked, again allowing the blades to rotate 1.
  • the invention it is possible to produce a cutting device or cutting tubes with one or more knives, generally two knives placed in opposition, making it possible to cut perfectly flat and smooth ends of pipe sections, without internal burrs and with knife wear reduced to a minimum.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Sawing (AREA)

Claims (8)

  1. Verfahren zum Schneiden oder Trennen von Rohren mit einem oder mehreren rotierenden Messern
    dadurch gekennzeichnet, dass ein Anfangsschnitt über einem größeren Teil der Wandstärke eines Rohres (6) mittels eines oder mehrerer rotierender Messer (1) durchgeführt wird und der endgültige Schnitt der verbleibenden Wandstärke (d) bei Blockierung der Rotation des oder der besagten Messer (1) erfolgt, und zwar mittels des oder der Messer, die den Anfangsschnitt durchgeführt haben.
  2. Vorrichtung zum Schneiden oder Trennen von Rohren zur Durchführung des Verfahrens nach Anspruch 1 im Wesentlichen bestehend aus zumindest einem rotierenden Schneidmesser (1), das an einem schwenkbaren Messerhalter-Hebel (2) montiert ist und mittels eines Stellantriebs (3) betätigt wird, wobei sie gemeinsam auf einem Messerträger-Fahrgestell (4) angeordnet sind, das quer verschiebbar zu einem Schneiddorn (5) ist, der das zu schneidende Rohr (6) trägt,
    dadurch gekennzeichnet, dass das oder die rotierenden Schneidmesser (1) während einer Anfangsphase des Schneidvorgangs zumindest mit einem Mittel (10) zur Beschränkung der Rotation zusammenwirken und dass das besagte Mittel (10) während der Endphase des Schneidens das oder die besagten Messer (1) blockiert.
  3. Vorrichtung nach Anspruch 2,
    dadurch gekennzeichnet, dass das Mittel (10) zur Beschränkung der Rotation des Messers (1) während einer Anfangsphase des Schneidvorgangs für jedes Messer (1) in Form einer auf eine Trommel (11) wirkende Bremsbacke gebildet wird, wobei die Trommel (11) drehfest mit dem Messer (1) verbunden ist und mittels eines Stellglieds (12), der auf dem Messerhalter-Hebel (2) montiert ist, betätigt wird.
  4. Vorrichtung nach einem der Ansprüche 2 und 3,
    dadurch gekennzeichnet, dass der Stellantrieb (3) die Schwenkbetätigung des Messerhalter-Hebels (2) ausführt oder der Messerhalter-Hebel (2) einerseits einen Anschlag für die Betätigung des Stellglieds (12) des Mittels (10) zur Beschränkung der Rotation des Messers (1) aufweist und andererseits einen Anschlag für das Ende des Rückhubes des Stellantriebes (3) oder für das Ende der Schwenkbewegung des Messerhalter-Hebels (2) in Ruheposition aufweist, wodurch das Auslösen des Stellgliedes (12) des Mittels (10) gestattet wird.
  5. Vorrichtung nach Anspruch 4,
    dadurch gekennzeichnet, dass die Befestigungs- und End-Anschläge verstellbar sind und einen Schalter oder dergleichen aufweisen zum Ein- oder Ausschalten der Betätigung des Stellgliedes (12) des Mittels (10) nach einer Bewegung des Stellantriebes (3), wobei der Messerhalter-Hebel (2) verschwenkt oder ein Schwenken des Messerhalter-Hebels (2) entsprechend der Anfangsphase des Schneidvorgangs bei Rotation der Messer (1) oder nach Rückkehr in die Ruheposition stattfindet.
  6. Vorrichtung nach einem der Ansprüche 2 bis 4,
    dadurch gekennzeichnet, dass das oder die Messer (1) frei verdrehbar auf dem Messerhalter-Hebel (2) gelagert sind.
  7. Vorrichtung nach einem der Ansprüche 2 bis 4,
    dadurch gekennzeichnet, dass das oder die Messer (1) jeweils auf einer Welle montiert sind, die mittels eines motorisierten Anbaus in Rotation versetzt wird, wobei das Mittel (10) zur Beschränkung der Rotation während einer Anfangsphase des Schneidvorgangs entweder durch den Antrieb selbst, in Form eines Schrittmotors oder einer Impuls-Rotationssteuerung oder eines Bremsmittel-Anbaus oder durch eine Anhaltevorrichtung einer Bremskupplung oder ähnlichem gebildet wird.
  8. Vorrichtung nach Anspruch 2,
    dadurch gekennzeichnet, dass der Schneiddorn (5) aus einer festen Rückholstange (13) besteht und an seinem distalen Ende einen festen Schneidring (14) aufweist, der mit der besagten festen Rückholstange (13) verbunden ist, wobei der Schneidring (14) eingefasst ist, zum einen, an dem freien Ende der festen Rückholstange (13), von einer drehbaren Manschette (15), die auf einen Kugellager (16) oder einem Gleitlager gelagert ist und zum anderen, an der zur Manschette entgegengesetzten Seite, von einem drehbaren Ring (17), der auf einem Kugellager (18) oder einem Gleitlager montiert ist.
EP99440268A 1998-10-27 1999-10-01 Verfahren sowie Vorrichtung zum Schneiden von Rohren Expired - Lifetime EP0997242B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9813555 1998-10-27
FR9813555A FR2784927B1 (fr) 1998-10-27 1998-10-27 Procede de coupe ou de recoupe de tubes et dispositif pour la mise en oeuvre de ce procede

Publications (2)

Publication Number Publication Date
EP0997242A1 EP0997242A1 (de) 2000-05-03
EP0997242B1 true EP0997242B1 (de) 2002-07-31

Family

ID=9532117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99440268A Expired - Lifetime EP0997242B1 (de) 1998-10-27 1999-10-01 Verfahren sowie Vorrichtung zum Schneiden von Rohren

Country Status (5)

Country Link
EP (1) EP0997242B1 (de)
AT (1) ATE221434T1 (de)
DE (2) DE69902335T2 (de)
ES (1) ES2155426T1 (de)
FR (1) FR2784927B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2914574B1 (fr) * 2007-04-04 2009-06-05 Eberle Soc Par Actions Simplif Dispositif de coupe ou de recoupe de tubes muni d'un couteau interieur
US20110154971A1 (en) * 2009-12-28 2011-06-30 Caterpillar, Inc. Apparatus for Cutting Reinforced Hose with Reduced Interior Hose Contamination

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2109786A (en) * 1936-01-13 1938-03-01 American Plastics Corp Method of and apparatus for operating a cutting tool
FR2584970B1 (fr) * 1985-07-22 1989-08-18 Sireix Georges Dispositif de coupe pour machines de formage d'articles enroules
US5383380A (en) * 1992-01-23 1995-01-24 B. J. Mackie And Co. (Aust.)Pty. Ltd. Material cutting machine for slicing a cylinder

Also Published As

Publication number Publication date
FR2784927B1 (fr) 2000-12-08
DE69902335T2 (de) 2003-10-16
FR2784927A1 (fr) 2000-04-28
EP0997242A1 (de) 2000-05-03
DE997242T1 (de) 2001-10-11
DE69902335D1 (de) 2002-09-05
ES2155426T1 (es) 2001-05-16
ATE221434T1 (de) 2002-08-15

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