EP1409170B1 - Procede et dispositif destines a exercer des forces de compression et/ou de traction sur des pieces se presentant essentiellement sous la forme de tiges en materiau electroconducteur et/ou magnetisable - Google Patents

Procede et dispositif destines a exercer des forces de compression et/ou de traction sur des pieces se presentant essentiellement sous la forme de tiges en materiau electroconducteur et/ou magnetisable Download PDF

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Publication number
EP1409170B1
EP1409170B1 EP02743169A EP02743169A EP1409170B1 EP 1409170 B1 EP1409170 B1 EP 1409170B1 EP 02743169 A EP02743169 A EP 02743169A EP 02743169 A EP02743169 A EP 02743169A EP 1409170 B1 EP1409170 B1 EP 1409170B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
bar
coils
coil arrangement
magnetic field
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
EP02743169A
Other languages
German (de)
English (en)
Other versions
EP1409170A1 (fr
Inventor
Peter Bilstein
Lothar Illgen
Werner Witte
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.)
Bueltmann GmbH
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Bueltmann GmbH
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Filing date
Publication date
Application filed by Bueltmann GmbH filed Critical Bueltmann GmbH
Publication of EP1409170A1 publication Critical patent/EP1409170A1/fr
Application granted granted Critical
Publication of EP1409170B1 publication Critical patent/EP1409170B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/005—Continuous extrusion starting from solid state material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/27—Carriages; Drives
    • B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive
    • B21C1/305—Linear motor pulling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/32—Feeding or discharging the material or mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus

Definitions

  • the invention relates to a method for applying pressure and / or tensile forces on a substantially rod-shaped workpiece made of electrically conductive and / or magnetizable material.
  • the invention further relates to an apparatus for carrying out the method.
  • rod-shaped workpieces in the sense of this invention are those workpieces whose extent in the axial direction significantly exceed the dimensions in the lateral directions. These can be, for example, tubes, rods, rods, profile struts or flat strips.
  • a magnetic field which is provided with a gradient pointing in the direction of the applied force
  • a magnetic field is generated in the electrically conductive and / or magnetizable material via a current flow induced by induction or via an orientation of magnetic poles. Due to this induced magnetic field and the gradient of the external magnetic field, the rod-shaped workpiece acts in the direction of the gradient of the outer Magnetic force.
  • a compressive force acting in one direction or a tensile force acting in the opposite direction can thus be applied to the workpiece.
  • the application of the forces is not mechanical, but purely on the interaction of the external magnetic field with the induced due to this field in the material of the workpiece magnetic field.
  • the invention is therefore based on the object to further develop the device known from the cited patent so that smaller machines are possible.
  • the magnetic field having a gradient is generated by at least two coils arranged around the rod-shaped workpiece, wherein the coils are in each case current-flowed for generating different magnetic fields.
  • individual conductor loops are to be understood.
  • two identically constructed coils can be axially spaced from each other around the workpiece are arranged, wherein for generating different fields currents of different strength and / or phase are passed through the coils.
  • the current flowing through the coil or coil arrangement can be changed as a function of time. This is done according to the invention periodically, wherein the selected frequency is selected according to a formed depending on the material properties and the dimensions of the rod-shaped workpiece resonant frequency. As such a resonant frequency, the frequency is designated at which the most efficient conversion of electrical energy into compressive or tensile forces takes place with the chosen coil arrangement with the interposition of the magnetic fields.
  • the magnetic field having a gradient can be generated by a current-carrying coil arrangement which has an inhomogeneous structure.
  • An inhomogeneous design of a coil arrangement should, however, also be understood as meaning a coil arrangement comprising a plurality of coils and comprising a plurality of coils differing in their properties from one another.
  • a magnetic field provided with a gradient can be generated in a simple manner, wherein the Coil assembly is fixed even in space and the magnetic field is generated by passing a current flow through the coil assembly.
  • Such a coil arrangement does not require any mechanically moving parts; the application of compressive and / or tensile forces to the workpiece takes place exclusively on the basis of the magnetic fields generated by the coil arrangement.
  • the coils may be cooled according to a proposal of the invention, if necessary.
  • the rod-shaped workpiece if it is electrically conductive, can be flowed through to support the application of compressive and / or tensile forces.
  • a further magnetic field is generated around the workpiece in addition to the magnetic field induced by the external magnetic field.
  • an amplification of the force applied to the workpiece can thus be achieved.
  • the workpiece can be cooled.
  • rod-shaped workpieces can be transported or pulled or pressed for forming by appropriate forming tools.
  • the rod-shaped workpieces need only be formed from an electrically conductive and / or magnetizable material. Come here all electrically conductive metals into consideration, but also magnetically polarizable or magnetizable plastics or similar materials.
  • a device for applying pressure and / or tensile forces to a substantially rod-shaped workpiece made of electrically conductive and / or magnetizable material is proposed by the invention with a current acted upon coil arrangement for forming a in the direction of applied force pointing gradient magnetic field on the workpiece.
  • the coil arrangement has at least two coils, which can be acted upon by a current which can be individually adjusted by means of a control for each of the coils.
  • the current is adjusted by the controller to vary periodically as a function of time, the frequency corresponding to the resonant frequency.
  • coils are understood to mean not only coils with a plurality of windings, but also individual conductor loops.
  • the individual coils are arranged according to an advantageous embodiment of the invention concentrically and axially spaced from each other around a workpiece path, along which the workpiece is to be subjected to a compressive and / or tensile force.
  • FIG. 1 schematically shown is a section of a tube 1.
  • the tube 1 is shown as it is pulled in the direction of arrow 8 to reduce the pipe diameter by a die 4.
  • a pipe section 2 with the starting diameter of the pipe is located on the left side of the die 4 in the figure.
  • the figure to the right of the die 4 shows a pipe section 3 which has a reduced diameter compared to the diameter of the pipe section 2.
  • a coil assembly 5 can be recognized, which is composed of a total of four similar coils 5a to 5d, which are spaced apart in the axial direction of the tube 1 and are arranged concentrically to the pipe section 3 around this.
  • the coils 5a to 5d of the coil arrangement 5 are connected to the power supply in each case via electrical lines 6a to 6d with a controllable current source 7.
  • individually different currents can be given via the electrical leads 6a to 6d to the coils 5a to 5d of the coil arrangement 5 in order to form a magnetic field with a gradient running in the direction of the arrow 8 in the region of the coil arrangement 5.
  • a gradient magnetic field induces in the tube section 3 of the tube of an electrically conductive and / or magnetizable material, a secondary magnetic field. Due to the interaction between the graded magnetic field generated by the coils 5a to 5d and the secondary magnetic field, a force is generated which, in the embodiment shown, acts in the direction of the arrow 8 on the pipe section 3 and thus on the pipe 1. With the help of this force, the tube 1 is pulled through the die 4 and deformed.
  • the controlled current source 7 can be operated in such a way that the currents flowing through the coils 5a to 5d are each variable in time, wherein the currents conducted in the lines 6a to 6d can each be different in size and / or phase-shifted.
  • a pulling force can also be applied to the pipe for pulling a pipe without mechanical aids. Only because of the primary magnetic field generated by means of the coil arrangement and the secondary magnetic field induced in the electrically conductive and / or magnetizable material of the tube is the tensile force required to pull the tube formed.
  • a coil arrangement corresponding coil arrangement 5 could be arranged on the pipe section 2 shown on the left in the figure, wherein the coils 5a to 5d would be wired so that a likewise acting in the direction of arrow 8 compressive force the pipe end 2 is exerted.
  • the illustrated embodiment is merely illustrative and not limiting.
  • the coil assembly 5 may have a different number than the four illustrated coils 5a to 5d.
  • a tube made of conductive material connected to the power source and so flowed through.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electromagnets (AREA)

Claims (10)

  1. Procédé d'application de forces de compression et/ou de traction sur une pièce (1) essentiellement en forme de barreau en matériau électriquement conducteur et/ou magnétisable, pour déformer la pièce (1) par des matrices de façonnage en vue de former un profil ou de modifier son diamètre,
    un champ magnétique qui présente un gradient dans la direction de la force à appliquer étant appliqué sur la pièce (1),
    le courant qui s'écoule dans le système de bobines (5) étant modifié périodiquement en fonction du temps à une fréquence qui correspond à une fréquence de résonance, de manière à exercer une force maximale sur la pièce (1) en forme de barreau.
  2. Procédé selon la revendication 1, caractérisé en ce que le champ magnétique est formé par un système de bobines (5) constitué d'au moins deux bobines (5a - 5d) disposées autour de la pièce (1) en forme de barreau et à distance l'une de l'autre dans la direction axiale, chacune des bobines étant traversée par un courant de manière à produire des champs magnétiques différents.
  3. Procédé selon la revendication 2, caractérisé en ce que les bobines (5a - 5d) sont chacune traversées par un courant, les courants qui s'écoulent dans les différentes bobines (5a - 5d) étant déphasés et/ou présentant des intensités différentes.
  4. Procédé selon l'une quelconque des revendications 2 à 3, caractérisé en ce que le courant qui s'écoule dans le système (5) de bobines varie en fonction du temps.
  5. Procédé selon l'une quelconque des revendications 2 à 4, caractérisé en ce que le système (5) de bobines est refroidi.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce (1) en forme de barreau est électriquement conductrice et est traversée par un courant.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce (1) en forme de barreau est refroidie.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les forces de compression et/ou de traction sont exercées sur la pièce (1) en forme de barreau pour la transporter et/ou la déformer.
  9. Dispositif d'application de forces de compression et/ou de traction sur une pièce (1) essentiellement en forme de barreau et en matériau électriquement conducteur et/ou magnétisable en vue de l'exécution du procédé selon l'une des revendications 1 à 8, pour déformer la pièce (1) par des matrices de façonnage en vue de lui donner un profil et/ou de modifier son diamètre, le dispositif présentant
    - un système (5) de bobines apte à être alimenté en courant de manière à produire un champ magnétique qui présente un gradient dans la direction de la force qui doit être appliquée sur la pièce (1) en forme de barreau,
    - une source de courant (7) qui peut être commandée par des conducteurs électriques, avec au moins deux bobines (5a, 5b) du système (5) de bobines et
    - une commande qui permet de régler séparément les courants dans les bobines,
    caractérisé en ce que
    la commande convient et est conçue pour modifier périodiquement en fonction du temps le courant qui s'écoule dans le système (5) de bobines à une fréquence qui correspond à la fréquence de résonance, de manière à exercer une force maximale sur la pièce (1) en forme de barreau.
  10. Dispositif selon la revendication 9, caractérisé en ce que les bobines (5a à 5d) sont disposées concentriquement et à distance l'une de l'autre dans la direction axiale de la pièce (1) en forme de barreau, autour d'une piste à pièces le long de laquelle une force de compression et/ou de traction peut être appliquée sur la pièce (1).
EP02743169A 2001-07-24 2002-06-10 Procede et dispositif destines a exercer des forces de compression et/ou de traction sur des pieces se presentant essentiellement sous la forme de tiges en materiau electroconducteur et/ou magnetisable Expired - Lifetime EP1409170B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10135876 2001-07-24
DE10135876A DE10135876C2 (de) 2001-07-24 2001-07-24 Verfahren und Vorrichtung zum Aufbringen von Druck- und/oder Zugkräften auf im wesentlichen stabförmige Werkstücke aus elektrisch leitfähigem und/oder magnetisierbarem Material
PCT/EP2002/006297 WO2003009949A1 (fr) 2001-07-24 2002-06-10 Procede et dispositif destines a exercer des forces de compression et/ou de traction sur des pieces se presentant essentiellement sous la forme de tiges en materiau electroconducteur et/ou magnetisable

Publications (2)

Publication Number Publication Date
EP1409170A1 EP1409170A1 (fr) 2004-04-21
EP1409170B1 true EP1409170B1 (fr) 2009-10-14

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EP02743169A Expired - Lifetime EP1409170B1 (fr) 2001-07-24 2002-06-10 Procede et dispositif destines a exercer des forces de compression et/ou de traction sur des pieces se presentant essentiellement sous la forme de tiges en materiau electroconducteur et/ou magnetisable

Country Status (6)

Country Link
US (1) US20050022571A1 (fr)
EP (1) EP1409170B1 (fr)
CN (1) CN1535189A (fr)
AT (1) ATE445468T1 (fr)
DE (2) DE10135876C2 (fr)
WO (1) WO2003009949A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102328006B (zh) * 2010-07-14 2013-11-20 上海工程技术大学 定长送丝装置及其送丝方法
DE102011088673A1 (de) * 2011-12-15 2013-06-20 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Werkzeugmaschine und Verfahren zur Bearbeitung von plattenförmigen Werkstücken
CN103885019B (zh) * 2014-02-28 2016-05-04 中国船舶重工集团公司第七一〇研究所 用于磁强计校准的双均匀区型磁场产生装置及校准方法
CN110216160B (zh) * 2019-05-24 2020-07-21 北京航空航天大学 一种薄壁毛细管电辅助拉拔加电装置及方法
CN116407368A (zh) * 2021-12-31 2023-07-11 元心科技(深圳)有限公司 一种保持长管状的植入式医疗器械平直的方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951407C (de) * 1952-11-08 1956-10-25 Metallspritz Und Schweisstechn Verfahren und Vorrichtung zum Vorwaertsbewegen von Draehten, Stangen oder Rohren beliebigen Materials, insbesondere in Metallspritzpistolen
US3874207A (en) * 1957-10-22 1975-04-01 Jerome H Lemelson Extrusion apparatus
US3203211A (en) * 1961-05-22 1965-08-31 George E Mallinckrodt Tubing fabrication
US3212311A (en) * 1962-04-17 1965-10-19 Inoue Kiyoshi Method and apparatus for electromagnetic shaping of metallic bodies
US3232087A (en) * 1964-01-23 1966-02-01 Reynolds Metals Co Extrusion system
FR1543492A (fr) * 1967-09-15 1968-10-25 Somenor Soc Metallurg Du Nord Dispositif électromagnétique de tension, de freinage ou d'entraînement de produits métallurgiques
DE1959873A1 (de) * 1968-11-28 1970-06-04 Linnman Sven Nils Johannes Vorrichtung zum Transportieren von Draht oder Pulver
US3557598A (en) * 1969-03-04 1971-01-26 Kaiser Aluminium Chem Corp Electromagnetic feeding device
US3911706A (en) * 1973-04-09 1975-10-14 Murray W Davis Method and apparatus for forming metal

Also Published As

Publication number Publication date
US20050022571A1 (en) 2005-02-03
ATE445468T1 (de) 2009-10-15
EP1409170A1 (fr) 2004-04-21
CN1535189A (zh) 2004-10-06
DE10135876C2 (de) 2003-11-13
DE50213925D1 (de) 2009-11-26
WO2003009949A1 (fr) 2003-02-06
DE10135876A1 (de) 2003-02-20

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