WO2002094488A1 - Procede et appareil de decoupe de profils creux a grande vitesse - Google Patents

Procede et appareil de decoupe de profils creux a grande vitesse Download PDF

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Publication number
WO2002094488A1
WO2002094488A1 PCT/SE2002/000961 SE0200961W WO02094488A1 WO 2002094488 A1 WO2002094488 A1 WO 2002094488A1 SE 0200961 W SE0200961 W SE 0200961W WO 02094488 A1 WO02094488 A1 WO 02094488A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
mandrel
ejection
movable
effected
Prior art date
Application number
PCT/SE2002/000961
Other languages
English (en)
Inventor
Ulf ÅHS
Original Assignee
Aahs Ulf
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 Aahs Ulf filed Critical Aahs Ulf
Priority to EP02733717A priority Critical patent/EP1401606A1/fr
Publication of WO2002094488A1 publication Critical patent/WO2002094488A1/fr

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
    • B23D21/00—Machines or devices for shearing or cutting tubes
    • 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
    • B23D21/00—Machines or devices for shearing or cutting tubes
    • B23D21/14—Machines or devices for shearing or cutting tubes cutting inside the tube
    • 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
    • B23D23/00—Machines or devices for shearing or cutting profiled stock

Definitions

  • the present invention relates to a method and apparatus for high-velocity cutting of hollow profiles by means of a cutting technique based on what is called adiabatic plasticizing.
  • Adiabatic plasticizing of material implies that, when a metal is subjected to rapid deformation processes the plastic deformation is localized to thin strips, known as adiabatic shear strips. Very large shearing extensions occur locally in the strips and as a result considerable local increases in temperature are obtained. The material is thus plasticized by means of heat in the thin layer where the mechanical tool cuts the material . Since the process is so quick ( ⁇ 1/100 sec) practically no thermal transport occurs out from the plasticized layer.
  • the adiabatic plasticizing process and how it is utilized for cutting are described in more detail in a publication by Professor Yngve Bergstrom and Doctor Lars Troive entitled
  • ADIABATIC FORMING AND POWDER COMPACTION A NEW REVOLUTION IN THE ENGINEERING INDUSTRY and the TAF society's publication "TESTING CENTER FOR ADIABATIC FORMING” .
  • Cutting with the aid of adiabatic plasticizing is thus a very competitive cutting method thanks to high production rate, high utilizing of material (no shavings) and low tool wear. Additional savings in costs can be achieved since no cutting fluids are needed and subsequent deburring operations can generally be eliminated.
  • the method is used with good results for cutting homogenous rod material such as steel rounds, for instance. Thanks to the above-mentioned production advantages with the method there is a considerable interest for cutting hollow profiles such as circular pipes. However, acceptable quality is not achieved if the technology currently available is used for cutting hollow profiles.
  • the impulse force from the stroke movement of the tool deforms the profile to a certain extent. Cutting a circular pipe, for instance, causes the cutting point to assume a more or less, undesired, oval shape.
  • the present invention aims at entirely or partially solving the problem of deformation in adiabatic cutting of hollow profiles.
  • These hollow profiles preferably consist of circular pipes but may also consist of other, non-homogenous profiles with different cross-sectional shapes, e.g. square, rectangular, triangular, etc.
  • the method in accordance with the invention is characterized in that the hollow profile blank is supported internally during the cutting operation by mandrels on both sides of the cutting point.
  • the apparatus in accordance with the invention is characterized in that it includes mandrels arranged on both sides of the cutting point in order to internally support the hollow profile blank during the cutting operation.
  • the apparatus also includes necessary components to enable a rapid cyclic cutting process. Besides the actual cutting step the process also includes positioning of the blank, setting the length to be cut and ejection of the cut product.
  • the apparatus does not include the mechanism that performs the rapid stroke movement that provides the adiabatic plasticizing. It is solely a tool that can be used in the same type of impact unit used for cutting homogenous blanks according to the current technique.
  • Figures la-c illustrate the principle of cutting with adiabatic plasticizing of homogenous rod material.
  • the figures illustrate the process in three steps : supply of energy, adiabatic plasticizing and separation.
  • Figure 2 shows the tool in accordance with the invention for cutting pipes in a position with partially withdrawn mandrels and the pipe blank in a position prior to being fed to the cutting position.
  • the main components of the tool are specified in this figure.
  • Figure 3 shows the tool in accordance with the invention in a position where the pipe blank and the movable mandrels are positioned for cutting.
  • Figure 4 shows the tool in accordance with the invention in a position where the movable cutting tool has reached its maximum stroke.
  • Figure 5 shows the tool in accordance with the invention in a position where the movable tool has returned to its original position and the cut component has been ejected.
  • Figure 6 shows clearance recesses beneath the cavity of the rigid cutting tool, to prevent molten metal from being deposited on the cutting tools.
  • Figure lb shows how the impact unit 4 has encountered the movable part 3 of the tool and compressed the damper 5. Adiabatic plasticizing of the cutting point 6 occurs at the instant the impact unit 4 encounters the movable part of the tool.
  • Figure lc shows that cutting has occurred, that the impact unit 4 has reversed its direction of movement and that separation of the cut component 7 is in progress.
  • Figure 2 shows the tool in accordance with the invention in a position with the mandrels withdrawn and the pipe blank in a position prior to being fed forward.
  • the tool comprises the following main components: Stand 8, fixed cutting tool 9, support mandrel 10 for the fixed part 9 of the cutting tool, attachment rod 11 for mandrel 10, feeding device 12 for pipe blank, movable cutting tool 13, damper and return feeder 14 of movable cutting tool 13 , support mandrel 15 for the movable part 13 of the cutting tool, length-setting ring 16, axial feeding device 22 for mandrel, length-setting unit and ejection unit, control and spring device 18 for mandrel, length-setting unit and ejection unit, positioning unit 20, feeding unit 21, ejection device 17 and length-setting unit 23.
  • Figure 2 thus shows that the forward mandrel 10 has been withdrawn to allow a new pipe blank 19 to be inserted.
  • the pipe blank is located in the positioning unit 20 in front of the feeding mechanism 12 integrated with the stand 8.
  • the function of the outer feeding mechanism 21 is, upon charging with a new pipe blank 19, to feed the pipe blank into the feeding mechanism 12 integrated with the stand 8.
  • FIG 3 shows how the pipe blank 19 with the outer feeding mechanism 21 and the feeding mechanism 12 integrated with the stand 8 have been fed forward to the cutting position.
  • Positioning of the pipe blank 19 is effected by the mandrel 15 with its pre-set length-setting ring 16 being fed to the cutting position in a time interval before the pipe blank 19 has been fed forward.
  • This position is programmed by means of the feeding unit 22 so that the forward tip of the mandrel 15 takes a position in line with the cutting point, i.e. between the fixed cutting tool 9 and the movable cutting tool 13.
  • the position of the length-setting ring 16 determines the length of the cut component.
  • the pipe blank 19 is thus fed forward until the feeding is stopped by the length-setting ring 16.
  • the mandrel 10 placed in the fixed cutting tool 9 is fed forward to its working position immediately the new pipe blank 19 has been fed in.
  • the mandrel 10 then remains in this position until a new pipe blank 19 is to be fed in.
  • this mandrel 10 it may be advantageous for this mandrel 10 to be resilient in order to achieve contact with the mandrel 15 placed in the movable cutting tool 13. The location of the latter mandrel will thus determine the position of both mandrels during the cutting process.
  • Figure 4 shows how an impact unit, not shown, has encountered the movable cutting tool with a force symbolized by the force arrow 24. Due to the speed of the stroke, cutting of the pipe blank 19 has occurred through adiabatic plasticizing. The two mandrels 10, 15 prevent deformation of the pipe blank 19 and the cut component 25, respectively.
  • the movable cutting tool 13 has reached its end position and the damping and springing-back unit 14 is compressed. Since the mandrel 15 is located inside the cut component 25 the entire mandrel unit with length-setting ring 16, length-setting device 23, mandrel 15, ejection device 17 and positioning unit 22 must accompany the stroke movement. This is achieved by means of a control and spring unit 18 placed between the stand 8 and the mandrel unit .
  • Figure 5 shows that the mandrel 15 in the movable cutting tool 13 has been fed out with the positioning device 22.
  • the mandrel 15 has been axially displaced so that the length-setting ring 16 ejects the cut component 25.
  • the movable cutting tool 13 has been returned to its initial position by the damping and springing-back device 14.
  • the control and spring unit 18 has also returned the mandrel unit to its initial position.
  • a new cycle is commenced when the cut component 25 has been ejected.
  • the mandrel 15 may in certain cases be expanding during the withdrawal cycle.
  • Figure 6 shows a method of reducing the problem of molten material being deposited on the cutting tools 9, 13.
  • the problem can be reduced by arranging clearance recesses 26 on the cutting and lower sides of the cavity of the cutting tools 9, 13.
  • the depth of the clearance recesses may vary depending on the dimensions of the pipe blank, but in most cases would be in the range of 0.5-5 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Punching Or Piercing (AREA)

Abstract

L'invention concerne un procédé et un appareil permettant de découper des profils creux par plastification adiabatique dans un outil (9, 13) qui empêche la déformation du composant découpé (25) à l'aide d'un support interne de profil creux.
PCT/SE2002/000961 2001-05-22 2002-05-21 Procede et appareil de decoupe de profils creux a grande vitesse WO2002094488A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02733717A EP1401606A1 (fr) 2001-05-22 2002-05-21 Procede et appareil de decoupe de profils creux a grande vitesse

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0101842-3 2001-05-22
SE0101842A SE522184C2 (sv) 2001-05-22 2001-05-22 Anordning och förfarande för höghastighetskapning av rörämne genom adiabatisk mjukgörning

Publications (1)

Publication Number Publication Date
WO2002094488A1 true WO2002094488A1 (fr) 2002-11-28

Family

ID=20284237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/000961 WO2002094488A1 (fr) 2001-05-22 2002-05-21 Procede et appareil de decoupe de profils creux a grande vitesse

Country Status (3)

Country Link
EP (1) EP1401606A1 (fr)
SE (1) SE522184C2 (fr)
WO (1) WO2002094488A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866823A1 (fr) * 2004-02-27 2005-09-02 Arcelor Negoce Distrib Dispositif d'amortissement pour machine-outil, machine et procede de decoupe adiabatique a tres haute cadence
WO2006036095A1 (fr) * 2004-09-28 2006-04-06 Morphic Technologies Aktiebolag (Publ) Outil de coupe transversale destine a la coupe transversale a haute vitesse
FR2929870A1 (fr) * 2008-04-10 2009-10-16 Adiapress Sarl Outillage pour la decoupe et cisaillage de tubes pour machine utilisant la transformation de l'energie adiabatique et machine l'incorporant
CN104043869A (zh) * 2014-05-05 2014-09-17 江苏金奕达铜业股份有限公司 多功能铜棒剪切装置
DE102015009139B4 (de) 2015-07-15 2020-01-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum spanlosen Trennen von Rohren

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1932122A1 (de) * 1969-06-25 1971-01-07 Volkswagenwerk Ag Vorrichtung zum Abtrennen von Rohrstuecken
DE2222236A1 (de) * 1971-05-06 1972-12-28 Henrik Jespersen Schleusvorrichtung fuer Rohrschermaschinen
US4470330A (en) * 1983-02-22 1984-09-11 Lindell Lennart J Tooling assembly for an impact press
JPH08267310A (ja) * 1995-03-30 1996-10-15 Nisshinbo Ind Inc パイプ切断装置
JPH10309618A (ja) * 1997-05-08 1998-11-24 Nisshinbo Ind Inc パイプ切断装置
WO2001028723A1 (fr) * 1999-10-19 2001-04-26 Hydropulsor Ab Agencement de presse a estamper et procede

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1932122A1 (de) * 1969-06-25 1971-01-07 Volkswagenwerk Ag Vorrichtung zum Abtrennen von Rohrstuecken
DE2222236A1 (de) * 1971-05-06 1972-12-28 Henrik Jespersen Schleusvorrichtung fuer Rohrschermaschinen
US4470330A (en) * 1983-02-22 1984-09-11 Lindell Lennart J Tooling assembly for an impact press
JPH08267310A (ja) * 1995-03-30 1996-10-15 Nisshinbo Ind Inc パイプ切断装置
JPH10309618A (ja) * 1997-05-08 1998-11-24 Nisshinbo Ind Inc パイプ切断装置
WO2001028723A1 (fr) * 1999-10-19 2001-04-26 Hydropulsor Ab Agencement de presse a estamper et procede

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866823A1 (fr) * 2004-02-27 2005-09-02 Arcelor Negoce Distrib Dispositif d'amortissement pour machine-outil, machine et procede de decoupe adiabatique a tres haute cadence
WO2005092549A1 (fr) * 2004-02-27 2005-10-06 Arcelor Negoce Distribution Dispositif d’amortissement pour machine-outil, machine et procede de decoupe adiabatique a tres haute cadence
WO2006036095A1 (fr) * 2004-09-28 2006-04-06 Morphic Technologies Aktiebolag (Publ) Outil de coupe transversale destine a la coupe transversale a haute vitesse
CN100467177C (zh) * 2004-09-28 2009-03-11 莫菲克科技股份公司 用于高速横切的横切工具和用于高速横切的横切颚
FR2929870A1 (fr) * 2008-04-10 2009-10-16 Adiapress Sarl Outillage pour la decoupe et cisaillage de tubes pour machine utilisant la transformation de l'energie adiabatique et machine l'incorporant
CN104043869A (zh) * 2014-05-05 2014-09-17 江苏金奕达铜业股份有限公司 多功能铜棒剪切装置
DE102015009139B4 (de) 2015-07-15 2020-01-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum spanlosen Trennen von Rohren

Also Published As

Publication number Publication date
SE522184C2 (sv) 2004-01-20
SE0101842D0 (sv) 2001-05-22
EP1401606A1 (fr) 2004-03-31
SE0101842L (sv) 2002-11-23

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