EP0472551A1 - Procede et dispositif pour pratiquer des rainures dans des corps tubulaires - Google Patents

Procede et dispositif pour pratiquer des rainures dans des corps tubulaires

Info

Publication number
EP0472551A1
EP0472551A1 EP19900906927 EP90906927A EP0472551A1 EP 0472551 A1 EP0472551 A1 EP 0472551A1 EP 19900906927 EP19900906927 EP 19900906927 EP 90906927 A EP90906927 A EP 90906927A EP 0472551 A1 EP0472551 A1 EP 0472551A1
Authority
EP
European Patent Office
Prior art keywords
cutting
shafts
knife
tube
straight
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.)
Withdrawn
Application number
EP19900906927
Other languages
German (de)
English (en)
Inventor
Hubert M. Drossbach
Karl Dietrich
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.)
Drossbach GmbH and Co KG
Original Assignee
Drossbach GmbH and Co KG
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 Drossbach GmbH and Co KG filed Critical Drossbach GmbH and Co KG
Publication of EP0472551A1 publication Critical patent/EP0472551A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/0015—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes
    • B26F1/0023—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes by rotary tools, e.g. saws

Definitions

  • the invention relates to a method and a device for cutting slots in tubular bodies.
  • Double-walled corrugated pipes with a smooth inner hose, which is connected on the inside to the troughs by welding, are particularly critical. Slanted or laterally offset slots in the wave troughs can damage the weld and make the pipe unusable.
  • the invention solves this problem with the features in the characterizing part of the main method and device claim.
  • the invention proposes to intermittently transport the tubular body, in particular a single-wall or multi-wall corrugated tube, and to introduce the slots at the times when the tube is at a standstill. This has the great advantage that geometric errors in the insertion of the slots are practically excluded. There can also be no more damage to the welds on multi-wall corrugated pipes.
  • the method according to the invention enables axially fixed knife shafts and thus also reliable detection of the pipe contour and exact guidance of the cutting knife.
  • corrugated tubes can be slotted with any wave heights and spacings, with no kinematics constraints with regard to the number and distribution of the slots over the circumference and in the longitudinal direction. Every wave trough can be provided with slits, as well as every second, every third, etc.
  • the method can be used for any types and materials of tubular bodies. It is particularly suitable for plastic corrugated pipes, preferably double-walled.
  • the corrugated tube can alternatively also be single-walled or have any other design.
  • the cutting device according to the invention has the advantage of simple kinematics of the knife shafts, which only rotate but do not have to move in the longitudinal direction.
  • the knife shafts can therefore be constructed in a structurally simple manner and be sufficiently stable to absorb the cutting reaction forces. This also enables a reduction in cross-sections and a denser arrangement and distribution of the knife shafts around the tube.
  • the knife shafts and the conveyor device are coordinated with each other in terms of drive and alignment.
  • the knife shafts can rotate continuously.
  • the conveyor can be designed differently, for example as an intermittent gripper.
  • screw conveyors with straight and inclined passage sections are provided for corrugated pipes, which can also rotate continuously. With the sloping aisle sections, the pipe is transported while it is at The straight passage sections are engaged.
  • This version has the advantage of a simple, compact and robust construction. It can be easily adapted and varied to different pipe shapes by varying the parameters of the knife shafts and screw conveyors.
  • the cutting device can also be easily converted.
  • the knife shafts and the screw conveyors have a common drive, into which a gear ratio may be switched on.
  • the transport screws can also sit directly on the knife shafts, which minimizes the construction effort and size.
  • multi-flight screw conveyors are used accordingly.
  • the screw conveyors can also be catchy and quickly translated in relation to the knife shafts.
  • the worm threads can have two or more straight sections.
  • the angular positions and directions of rotation of the knife shafts are coordinated to optimize the cutting forces and cutting reactions.
  • the straight aisle sections are preferably shorter than the oblique and just as long as is necessary for the engagement and the guidance of the cutting knives.
  • the dimensions also depend on the pipe shape and the cutting specifications.
  • the straight sections cover a circumferential angle between 70 ° and 100 ° depending on their number per gear. So that the protruding knife tips of adjacent shafts do not interfere with one another, they are axially offset from one another. The offset is based on the cutting specifications and also serves to make the slots in the troughs two or more times.
  • Fig. 3 an end view of the knife shaft distribution
  • Fig.4 a knife shaft in side view
  • Fig. 5 u. 6 Cross sections through the knife shaft.
  • the cutting device (1) shown in FIGS. 1 and 2 is used to cut slots (13) into the valleys of a corrugated pipe (2) with closed valleys and heights.
  • the tube is designed as a double-walled corrugated tube (2) made of thermoplastic material with a smooth inner skin and a corrugated outer skin.
  • Such a corrugated tube (2) is known for example from DE-OS 36 05 329.
  • Corrugated pipes serve e.g. as a drain pipe for drainage or irrigation pipes.
  • Fig. 1 and 2 illustrate the corrugated tube (2) on the input side for transport and arranged to be distributed outside the housing (12) has four screw conveyors (3) with longitudinal axes uniformly around the corrugated tube axis'.
  • the tube (2) also engages in the form of conical friction rollers on the input side, which rotate about transverse axes and prevent the tube (2) from being undesirably twisted about its longitudinal axis.
  • On the output side there are also two mutually opposing identical screw conveyors (3).
  • the corrugated tube (2) is additionally guided on a flange (16). For a clearer representation, the corrugated tube (2) is only shown on the output side.
  • the screw conveyors (3) have one or more gears.
  • the screw conveyors (3) have straight passage sections (4) and inclined, i.e. helically wound passage sections (5).
  • the individual worm threads each have the straight and inclined gear sections (4, 5) on the same circumferential area.
  • the straight aisle sections (4) extend over a circumferential angle between 70 ° and 100 °.
  • knife shafts (6) are evenly distributed in the housing (12) around the circumference of the tube.
  • the knife shafts (6) extend along the transport direction (14) and are axially fixed so that they can only rotate about their longitudinal axis.
  • a cutting knife (7) is arranged on each cutter shaft (6) and moves in a circular path.
  • the knife shafts (6) are coupled to each other and to the feed screws (3) in terms of drive (see Fig. 1). They are driven from the outside by a drive wheel (11), for example via a chain drive.
  • the individual cutter shafts (6) are driven by a drive shaft (15) and a transfer case arranged in the rear part of the housing (12).
  • the drive for the screw conveyors (3) is derived from the shaft (15).
  • the drive transmission is designed so that during the turning phase, in which the straight gear sections (4) are engaged and hold the tube (2), the knife shafts (6) cut the slots in the tube (2).
  • all cutter shafts (6) are out of engagement, so that the tube (2) can be transported further by means of the inclined passage sections (5).
  • the cutting knives (7) are axially offset from one another on adjacent knife shafts (6) so as not to collide with one another during one revolution.
  • the offset is preferably directed alternately forwards and backwards. Its size depends on the corrugated pipe pitch and the desired slot spacing. If only every second wave trough is to be slit, the offset is correspondingly greater than with slitting each wave trough.
  • the knife shafts (6) are also offset from one another in terms of their angle of rotation, ie the angular position of their cutting knives (7). Relative to the pipe axis (14) or the engagement position with the pipe (2), the offset is 180.
  • the cutting knives (7) thus come into engagement with the tube (2) in two groups a and b.
  • the knife shafts (6) also rotate alternately in opposite directions.
  • the mutual assignment of the knife shafts is made in such a way that the reaction forces of the cutting knives (7) in engagement cancel each other out by none Initiate moments on the pipe (2). It is also advantageous if the angular positions of the knife shafts (6) are selected so that the same number of cutting knives (7) are always in engagement. 3 shows this knife position and the division of the knife shafts into two groups of the same size (6a and 6b).
  • Fig. 4 - 6 illustrate the design of the knife shafts (6) in detail.
  • a single cutting knife (7) protruding perpendicular to the shaft axis is arranged on each knife shaft (6).
  • Guide fins (8) are arranged on both sides of the cutting knife (6) and in the angular position in the center thereof, which plunge into the adjacent troughs of the tube (2) simultaneously with the cutting knife (7) and ensure centering of the position.
  • the fins (8) are curved on the outside and extend approximately over 1/4 of the shaft circumference.
  • the fins (8) have a common, stepped foot part (9) with which they are inserted into a correspondingly recessed opening in the knife shaft (6).
  • the foot section (9) is held in place by two countersunk screws on the outside.
  • the cutting knife (7) is longitudinally displaceable with a similar foot part with an elongated hole within the foot part (9) and the knife shaft (6). Its immersion depth is set at the rear using a screw (17), while the knife body is clamped by means of a clamping screw (10).
  • the knives are arranged in two groups offset by 180 ° analogous to the embodiment shown.
  • every second wave trough is to be slit, a two-flight screw conveyor is used, in which each course, however, now has two straight sections of approx. 70 °, so that in the first stand break one knife group and in the second stand break the other knife group for engagement is coming.
  • the screw conveyors can have two straight sections in one passage without geometric problems because of the smaller pitch. This means that a screw arrangement inside the housing is also possible.
  • the transport screws have two gears, each gear having a straight section of approximately 100 over a 360 ° circumferential angle.
  • the transport screws sit directly on the knife shafts and are arranged inside or outside the housing.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Screw Conveyors (AREA)
  • Turning (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour pratiquer des rainures (13) dans des corps tubulaires. Le corps tubulaire (2) est, à cet effet, déplacé par intermittence, et les rainures (13) sont pratiquées durant les intervalles de temps d'arrêt. Le dispositif de coupe (1) présente, dans ce but, un dispositif d'avancement par intermittence pour le tube (2), se présentant de préférence sous la forme d'au moins une vis sans fin (3) à filets droits et inclinés (4, 5). Le dispositif de coupe (1) présente en outre plusieurs arbres de coupe (6) montés en rotation et répartis autour du tube (2), dont l'orientation et la mise en marche sont réglées en fonction de la cadence d'avancement. Lorsqu'il y a un plus grand nombre de couteaux (7), les arbres de coupe (6) sont subdivisés en deux groupes et pratiquent des rainures dans le tuyau (2), par groupes et successivement. A cet effet, l'inclinaison et le sens de rotation des différents arbres de coupe (6) sont choisis pour qu'il y ait constamment un nombre égal de couteaux en prise pour la coupe, et que les moments exercés par les forces de coupe sur le tube (2) soient compensés.
EP19900906927 1989-05-05 1990-05-02 Procede et dispositif pour pratiquer des rainures dans des corps tubulaires Withdrawn EP0472551A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914779 1989-05-05
DE19893914779 DE3914779A1 (de) 1989-05-05 1989-05-05 Verfahren und vorrichtung zum schneiden von schlitzen in rohrfoermige koerper

Publications (1)

Publication Number Publication Date
EP0472551A1 true EP0472551A1 (fr) 1992-03-04

Family

ID=6380113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900906927 Withdrawn EP0472551A1 (fr) 1989-05-05 1990-05-02 Procede et dispositif pour pratiquer des rainures dans des corps tubulaires

Country Status (5)

Country Link
EP (1) EP0472551A1 (fr)
JP (1) JPH0710518B2 (fr)
CA (1) CA2054685C (fr)
DE (1) DE3914779A1 (fr)
WO (1) WO1990013400A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316146A1 (de) * 1993-05-14 1994-11-17 Wolfgang Gottbehuet Arbeitsverfahren zum Einbringen eines Schlitzes, einer Nut o. dgl. in einen Körper aus Plaste und Schneidwerkzeug zu dessen Durchführung
DE4332123A1 (de) * 1993-09-22 1995-03-23 Wilhelm Hegler Vorrichtung zum Sägen von Schlitzen in Well- und Verbundrohre
DE19609693A1 (de) * 1996-03-13 1997-09-18 Ralph Peter Dr Ing Hegler Verfahren und Vorrichtung zum Schneiden von Schlitzen in Rohre aus Kunststoff
DE102006032861A1 (de) * 2006-07-14 2008-01-17 Emitec Gesellschaft Für Emissionstechnologie Mbh Erzeugung von Öffnungen in einer Metallfolie sowie damit hergestellte Wabenkörper zur Abgasbehandlung
CN103241506A (zh) * 2013-05-28 2013-08-14 赵剑毅 一种送料装置
JP6931422B2 (ja) 2017-07-07 2021-09-01 イノ−スピン エルエルシー 半径方向壁のスルー作動式穿刺

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2051087A1 (de) * 1970-10-17 1972-06-22 Th. Kieserling & Albrecht, 5650 Solingen Verfahren zum Zuführen runder, sich während der Bearbeitung um ihre Längsachse drehender Werkstücke zu Bearbeitungsmaschinen, insbesondere Richtmaschinen
FR2250621B1 (fr) * 1973-11-12 1977-06-03 Valsemey Pierre
US3957386A (en) * 1975-02-18 1976-05-18 Lupke Manfred Arno Alfred Corrugated tubing perforating machine
US4000672A (en) * 1976-02-26 1977-01-04 Altair National Corporation Slitting machine for corrugated pipe
FR2356492A1 (fr) * 1976-07-03 1978-01-27 Hegler Wilhelm Dispositif pour decouper des ouvertures espacees d'une maniere quelconque dans des tubes lisses a l'interieur et/ou a l'exterieur ou munis d'ondulations transversales a l'interieur et/ou a l'exterieur et tube d'irrigation pourvu d'ouvertures ainsi decoupees
US4052880A (en) * 1976-08-10 1977-10-11 Noah E. Foulks Pipe perforating machine
CA1060775A (fr) * 1977-03-18 1979-08-21 Manfred A.A. Lupke Perforatrice de tubes
CA1119090A (fr) * 1979-01-11 1982-03-02 Manfred A. A. Lupke Methode et appareil pour la perforation de conduits tubulaires
CA1187399A (fr) * 1981-12-28 1985-05-21 Manfred A.A. Lupke Outil sectionneur rotatif
DE3200081A1 (de) * 1982-01-05 1983-07-14 Hegler, Wilhelm, 8730 Bad Kissingen Vorrichtung zum einschneiden von oeffnungen in rohre
DE3243625C2 (de) * 1982-11-25 1986-10-23 Metallwarenfabrik König GmbH, 7560 Gaggenau Stanzvorrichtung zum Herstellen von Lochreihen auf dem Umfang eines Rohres

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9013400A1 *

Also Published As

Publication number Publication date
JPH0710518B2 (ja) 1995-02-08
DE3914779A1 (de) 1990-11-08
JPH04504984A (ja) 1992-09-03
WO1990013400A1 (fr) 1990-11-15
CA2054685C (fr) 1998-02-17
CA2054685A1 (fr) 1990-11-10

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