EP0142498A1 - Dispositif de coupe en diagonale pour decouper une tole destinee a un tube soude en spirale - Google Patents

Dispositif de coupe en diagonale pour decouper une tole destinee a un tube soude en spirale

Info

Publication number
EP0142498A1
EP0142498A1 EP19830903541 EP83903541A EP0142498A1 EP 0142498 A1 EP0142498 A1 EP 0142498A1 EP 19830903541 EP19830903541 EP 19830903541 EP 83903541 A EP83903541 A EP 83903541A EP 0142498 A1 EP0142498 A1 EP 0142498A1
Authority
EP
European Patent Office
Prior art keywords
blade
chopping
blades
shearing
sheet band
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Withdrawn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
EP19830903541
Other languages
German (de)
English (en)
Inventor
Pentti Sandholm
Pekka Pulkkinen
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.)
Nokia Oyj
Original Assignee
Nokia Oyj
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 Nokia Oyj filed Critical Nokia Oyj
Publication of EP0142498A1 publication Critical patent/EP0142498A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D19/00—Shearing machines or shearing devices cutting by rotary discs
    • B23D19/08—Shearing machines or shearing devices cutting by rotary discs for special use, e.g. for cutting curves, for chamfering edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/126—Supply, or operations combined with supply, of strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D19/00—Shearing machines or shearing devices cutting by rotary discs
    • B23D19/04—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs

Definitions

  • the present invention is concerned with a diagonal cutter for cutting-off a metal-sheet band intended for a spiral-seamed pipe, the said cutter comprising a frame and two disc-shaped shear blades supported on separate, parallel shafts of rotation, the circumferential edges of the said blades forming a shearing gap between them, as well as actuating members for displacing the shear blades transversely to the path of movement of the metal-sheet band to be cut.
  • Spiral-seamed pipes have been manufactured in the factory by turning a metal-sheet band in the spiral shape into a seamed continuous pipe, out of which pipe portions of desired length have been cut off by cutting off the pipe at desired positions by means of a cut-off disc.
  • a mode of cutting off causes an abundance of disturbing noise.
  • a diagonal cutter is known by means of which the metal-sheet band can be cut off to such a length that a spiral-seamed pipe of desired diameter and length can be turned out of the sheet band in this way cut off. It is an advan- tage of such a mode of manufacture that the cutting off of the metal-sheet band can be performed in advance as a relatively noise-free working step by means of the suggested diagonal cutter.
  • the shear line cut off is turned to a pipe with a certain pitch, the shear line must pass diagonally from one longitudinal edge of the sheet band to the other, whereat the magnitude of the shear angle is 1 to 40°, depending- on the diameter of the pipe and on the pitch of the spiral.
  • a projecting thorn is formed at both ends of the complete pipe, because of which it is necessary to cut off a triangular tip piece out of both ends of the diagonally cut metal-sheet band.
  • the diagonal cutter in accordance with the said Swedish patent is provided with two disc-shaped shear blades, which are mounted on shafts of rotation perpendicular to each other.
  • Such a construction makes the initial cutting of the shear blades into the sheet band difficult, and in order that it should be possible to make the shearing start exactly at the correct point, a notch or a similar starting point must be prepared at the longitudinal edge of the metal-sheet band.
  • a separate punching device is required in the Swedish diagonal cutter. True enough, this punching device can be utilized for cutting-off of the said triangular tip piece of the sheet band, but when the angle of the shearing line is very small, the side of the tip piece becomes so long that it cannot be cut off by means of the punching device.
  • the chopping blade which is provided with several projecting chopping edges, revolves con ⁇ stantly along with the shear blade, so that the strip cut-off from the longitudinal edge of the sheet band becomes chopped into little pieces as the cutting of the sheet band makes progress.
  • the object of the present invention is to provide a diagonal cutter which avoids the above draw ⁇ backs and permits cutting-off of the tip pieces of the metal-sheet band from both ends of the pipe in connection with the diagonal shearing of the sheet band by making use of existing shear blades with relatively little accessories. This objective is achieved by means of a diagonal cutter in accordance with the present inven ⁇ tion, which is characterized in
  • each of the shafts of rotation is pro- vided with a chopping blade, which is placed, in a way in itself known, opposite the shearing blade placed on the other shaft of rotation so that the shearing blade forms a counterpiec ⁇ for the chopping blade,
  • each chopping blade can be rotated in relation to the shearing blade placed on,the same shaft of rotation
  • the chopping blades are connected to actuating members in view of rotating the chopping edges against the shearing blades at different longitudinal edges of the metal-sheet band.
  • the invention is based on the idea that, by providing each shearing blade with a chopping blade of its own, whereat the shearing blades act as counter- pieces for the said chopping blades, it is possible to direct the chopping effect at the sheet band at opposite sides of the shear line produced by the shearing blades.
  • the chopping blades are installed rotable relative the shearing blades, it is possible to make, the chopping blades operate at the desired stages of the diagonal shearing. Owing to this, the sharp tip piece remaining at the rear part of the band portion to be cut-off from the metal-sheet band can be chopped off from the band
  • the sharp tip piece remaining at the front edge of the cut-off sheet band can be chopped off at the initial end of the diagonal shear line.
  • the said tip pieces of the sheet band can be cut off irrespective of the length of the side of the tip piece.
  • the chopping takes place automatically during the shearing of the sheet band. Under these circumstances, a tip piece of correct shape can be chopped off the sheet band even in the case of small angles of the shear line.
  • Figures 1 and 2 are schematical views of a spiral-seaming machine provided with a diagonal cutter in accordance with the invention
  • Figure 3 is an enlarged vertical view of the construction of a preferred embodiment of the diagonal cutter
  • Figure 4 is a perspective view of the principle of operation of the diagonal cutter
  • Figures 5 and 6 are top views of two different modes of cutting of a metal-sheet band.
  • the spiral-seaming machine shown in Figures 1 and 2 of the drawings comprises a- starting frame 1 for the sheet-band roll 2 to be processed, a diagonal cutter 3 for cutting the sheet band into pieces of desired length, folding rolls 4 for preliminary shaping of the longitudinal edges of the sheet band to the shape required by the seaming, and seaming rolls 5 for bending the sheet band into a spiral-shaped pipe and for performing the seaming.' The result is a spiral- seamed metal-sheet pipe 6.
  • the diagonal cutter comprises a support 7, on which two blade groups 8 and 9 are installed.
  • the shaft of rotation 10 belonging to the upper blade group is journalled on the support by means of bearings 11.
  • a disc-shaped chopping blade 12 is rigidly mounted on the shaft of rotation.
  • a disc-shaped diagonal-shearing blade 13 is placed coaxially, the said blade 13 being journalled to the support by means of bearings 14 and being mounted freely rotatingly to the end of the shaft of rotation, as is indicated by means of broken lines.
  • the shaft of rotation is connected to a rotation motor 15.
  • the lower blade group 9 is mounted on the base 16, which is mounted pivotably on the support 7 by means of a pivot shaft 17. '
  • the shaft of rotation 20 belonging to the lower blade group is mounted to the base by means of a bearing 18, and a disc-shaped chopping blade 22 is attached rigidly to the end of the shaft of rotation.
  • a disc ⁇ shaped diagonal-shearing blade 23 which is rigidly attached to a sleeve 19 freely revolving on the shaft of rotation, the said sleeve 19 being supported on the support by means of bearings 21.
  • the shaft of rotation 20 is connected to a rotation motor 15 of its own.
  • the shafts of rotation 10 and 20 are posi ⁇ tioned substantially parallel to each other, and between them there is a slot 24 in the support.
  • the diagonal-shearing blades of the two blade groups are placed as axially displaced relative each other so that their circumferential edges facing each other are located so that they overlap each other and form a shearing gap 25 between them.
  • the chopping blade of the upper blade group is placed straight above the diagonal-shearing blade of the lower blade group and, correspondingly, the chopping blade of the lower blade group is placed straight underneath the diagonal-shearing blade of the upper blade group.
  • Each chopping blade is provided with a chopping edge 26 placed on the circum ⁇ ference.
  • a positioning device 27 which comprises an actuating cylinder 28, which is mounted on the support and to whose piston rod a wedge-shaped slide 29 is attached, which is placed against a station ⁇ ary counterpiece 30 provided on the support, on one hand, and against a counterpiece 31 with diagonal face provided on the base 16, on the other hand.
  • the arrangement is such that the slide can be pressed by means of the actuating cylinder more or less between the counter- pieces 30 and 31 , whereat the lower blade group moves substantially vertically relative the upper blade group.
  • the support 7 is placed in support on a sledge 33 placed underneath, by means of a vertical pivot shaft 32, which sledge 33 is supported by horizontal guides 34, which are installed glidingly on a stationary support 35 carried by the frame of the diagonal cutter.
  • the sledge is connected to an actuating device 39, illustrated only schematically, for the purpose of displacing the sledge relative the support 35.
  • the sledge is, moreover, provided with a locking device, not shown, by means of which the angular position of the support 7 relative the direction of movement of the sledge can be locked.
  • the diagonal cutter is installed in the path A of movement of the metal-sheet band 2 to be cut so that the guides 34 are placed perpendicularly to the path of movement of the sheet band, as is shown in Fig. 4, and that the path of movement of the sheet band passes
  • Both of the blade groups are, thus, placed at opposite sides of the sheet band.
  • the positioning device 27 it is possible to adjust the shearing gap between the two blade groups, i.e. the degree of overlapping of the diagonal- shearing blades, so that it corresponds to the thickness . of the metal-sheet band to be cut.
  • the angle B of the shear line of the sheet band, Fig. 5, relative the longitudinal edge of the band depends on the diameter of the spiral-seamed pipe to be manufactured and on the pitch of the spiral.
  • the support 7 is locked onto the sledge at such an angular position that the shafts of rotation of the blade groups are placed in a plane perpendicular to the shear line.
  • the diagonal-shearing 'blades are first cut into the sheet band at the initial end of the shear line, and thereupon they roll along opposite faces of the band and cut through the sheet band along the shear line.
  • the chopping blade is rotated by means of a motor in order that the slight bond that remains on chopping by compression could be torn apart and the tip piece 37A be cut off.
  • the chopping blade 22 of the lower blade group is rotated in a corresponding way so that the other tip piece 37B is cut off.
  • uncut bonds 38 are allowed to remain on the shear line at regular distances.
  • the bonds are produced by providing the outer circumference of one of the diagonal-shearing blades, acting as the shearing edge, with corresponding notches. In order that bonds should not remain on the shear line at the tip pieces to be cut apart, a higher overlapping depth of the blades is used when running at the starting and finishing portions of the shear line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

Dispositif de coupe en diagonale permettant de découper une tôle destinée à un tube soudé en spirale, et comprenant un bâti et deux lames de coupe en forme de disques (13, 23) supportées par des arbres de rotation séparés, parallèles (10, 20), les bords circonférentiels des lames formant un espace de cisaillement entre elles, ainsi que des organes d'actionnement (32 à 34) pour déplacer les lames de cisaillement transversalement au chemin (A) de déplacement de la bande de tôle (2) à découper. Chacun des arbres de rotation est pourvu d'une lame hacheuse (12, 22) placée de manière connue à l'opposé de la lame de cisaillement placée sur l'autre arbre de rotation de sorte que la lame de cisaillement forme une contre-pièce pour la lame hacheuse. Chaque lame hacheuse peut tourner par rapport à la lame de cisaillement placée sur le même arbre de rotation. Les lames hacheuses sont reliées aux organes d'actionnement dans le but de faire tourner les bords hacheurs (26) des lames hacheuses (12, 22) contre les lames de cisaillement (13, 23) à différents bords longitudinaux de la bande de tôle pour découper les parties en pointe (37A) de la bande de tôle, lesquelles parties en pointe sont produites sur le cisaillement diagonal (36).
EP19830903541 1982-10-29 1983-10-27 Dispositif de coupe en diagonale pour decouper une tole destinee a un tube soude en spirale Withdrawn EP0142498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI823704 1982-10-29
FI823704A FI68538C (fi) 1982-10-29 1982-10-29 Snedskaerare foer kapning av plotband avsett foer spiralfogat roer

Publications (1)

Publication Number Publication Date
EP0142498A1 true EP0142498A1 (fr) 1985-05-29

Family

ID=8516229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830903541 Withdrawn EP0142498A1 (fr) 1982-10-29 1983-10-27 Dispositif de coupe en diagonale pour decouper une tole destinee a un tube soude en spirale

Country Status (3)

Country Link
EP (1) EP0142498A1 (fr)
FI (1) FI68538C (fr)
WO (1) WO1984001728A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138424A1 (fr) * 2000-03-31 2001-10-04 Corus Bausysteme GmbH Dispositif et methode pour couper des pièces métalliques en forme conique
CN114619091A (zh) * 2022-03-28 2022-06-14 共享装备股份有限公司 一种裁剪装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110208A (en) * 1960-11-07 1963-11-12 Reynolds Metals Co Apparatus for trimming marginal edges of metal strip and for chopping marginal trimmings
SE407524B (sv) * 1978-01-17 1979-04-02 Prov & Verktyg Ab Maskin for tillverkning av spiralslagna ror av platband
SE427904B (sv) * 1980-05-05 1983-05-24 Prov & Verktyg Ab Maskin for kontinuerlig framstellning av skruvlindade ror av platband

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8401728A1 *

Also Published As

Publication number Publication date
FI68538B (fi) 1985-06-28
FI68538C (fi) 1985-10-10
WO1984001728A1 (fr) 1984-05-10
FI823704L (fi) 1984-04-30
FI823704A0 (fi) 1982-10-29

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19841123

AK Designated contracting states

Designated state(s): AT DE FR GB SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19850731

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SANDHOLM, PENTTI

Inventor name: PULKKINEN, PEKKA