EP0008625A1 - Procédé pour allonger, par un procédé de formage à froid, un fil d'acier obtenu par laminage à chaud, leguel fil présente un diamètre do jusqu'à 20mm par exemple, et une teneur en carbone comprise entre 0,1% et 1%, et dispositif pour la mise en oeuvre dudit procédé - Google Patents

Procédé pour allonger, par un procédé de formage à froid, un fil d'acier obtenu par laminage à chaud, leguel fil présente un diamètre do jusqu'à 20mm par exemple, et une teneur en carbone comprise entre 0,1% et 1%, et dispositif pour la mise en oeuvre dudit procédé Download PDF

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Publication number
EP0008625A1
EP0008625A1 EP79102196A EP79102196A EP0008625A1 EP 0008625 A1 EP0008625 A1 EP 0008625A1 EP 79102196 A EP79102196 A EP 79102196A EP 79102196 A EP79102196 A EP 79102196A EP 0008625 A1 EP0008625 A1 EP 0008625A1
Authority
EP
European Patent Office
Prior art keywords
wire
diameter
round wire
extension
cold forming
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Withdrawn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
EP79102196A
Other languages
German (de)
English (en)
Inventor
Stefan Dipl.-Ing. Keller
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.)
Engelbrecht Maja
Original Assignee
Engelbrecht Maja
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 Engelbrecht Maja filed Critical Engelbrecht Maja
Publication of EP0008625A1 publication Critical patent/EP0008625A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/05—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire
    • B21F9/007—Straining wire to induce a plastic deformation of the wire

Definitions

  • the invention is a method and a device in the sense of the preamble of claims 1 and 4.
  • the wire is precisely calibrated there as long as the nozzles have their desired dimensions. Adjustment of the nozzles to certain nominal dimensions or readjustment to compensate for decalibrations is generally not possible. Roller calibers also have only a small adjustment option.
  • DIN 59110 provides large tolerance ranges for the delivery of wire rod - for example, for wire with 12 0, a tolerance range of +0.4 to -0.4, i.e. from 11.6 to 12.4 0, is seen by the wire processors Economical adjustment of the diameter of the wires supplied by the rolling mills to the diameters permitted in the own processing frame (target diameter) for prior extension of the wires by cold forming. Often, strength-related considerations force the wires to be lengthened beforehand, in particular the wire types addressed by the preamble of claim 1, by cold forming. The wire processor therefore requires a simple process and simple, inexpensive facilities, with which such wires can be brought to any desired, ie adjustable, diameter by cold forming in the frame up to 70% and more.
  • the wire is formed on a curve, which in terms of device technology is most easily formed by rollers with an adjustable wrap angle of the wire around the rollers, in mostly only a single plane containing the wire without being constricted by bending and stretching. formed a predetermined diameter. High degrees of ironing with a high angle of wrap of the wire around the rollers and small degrees of ironing through small angles of wrap can be achieved.
  • the roller tool can be opened for wire insertion and can also be adjusted during the machining process to adjust the degree of deformation.
  • the wire can be processed not only in a single plane, but naturally also in several planes containing the wire, ie it can also act in different directions.
  • the scale of the wire rod can be broken during the forming process.
  • the known device can also be supplied with scaled wire rod.
  • the forming process is also largely independent of speed.
  • the known device can therefore also be operated in a tow train, ie without its own drive for pulling the wire, by connecting it upstream of a wire processing machine which pulls the wire through the forming zone at any speed, including intermittently, with its already necessary feed and pull-in device .
  • the object of the invention is to return the yield strength ratio, which has dropped too much in the course of the lengthening of wire by cold forming in the sense of US Pat. No. 3,256,725, to and above the target value of 1.05 and likewise of the residual elongation value to and above the setpoint of 8% while avoiding an intermediate annealing process.
  • the invention is based on the solution based on the surprising finding that, in the course of the generic extension of the types of wire mentioned by cold forming, the yield strength and residual elongation values have dropped too much purely mechanically, even directly in the course of the cold forming process or even subsequently, without significant loss of strength and beyond the specified target values of 1.05 or 8% can be raised permanently.
  • the solution according to claim 1 consists in a slight, even compression of the cross section of the elongated wire by 1% o to 3%.
  • the elongated round wire for upsetting in a continuous pass at the speed V 5 can be fed into a free zone in which it is prevented from buckling and can be led out of it at a speed V 6 , the value of which is 0.999 to 0.9? Times of V is 5 .
  • the elongated round wire can be subjected to a slight back and forth bending process for upsetting, when an inhibiting force is applied at its outlet end, during continuous passage through a roller straightening system.
  • Claim 4 states that a device suitable for solving the task within the generic scope is seen in the fact that, following the extension area of the device, an upsetting device acting on the elongated round wire reduced in diameter d 1 with two spaced apart (free zone) drive roller sets is provided, the first of which has the conveying speed V 5 and the second of which has the conveying speed Y 6 , which is (0.99 to 0.97) times V 5 , the round wire being guided in the free zone against buckling.
  • Claim 5 states that a roller straightening system with fine adjustable deflection of the elongated round wire is optionally provided in conjunction with drive roller sets, of which the one arranged in the outlet exerts an inhibiting force on the elongated round wire as the upsetting device.
  • Claim 6 states that this roller straightening system can be put into circulation around the wire.
  • the curve of the forming zone consisting of wave crests and wave valleys with tangent-like transitions as shown in Fig. 1, 1a and 2, through which the wire is pulled by a pulling drum or a pulling slide with the force Z (see Fig. 1) or to which the wire is drawn is formed in the simplest case from a nozzle pull provided with a side insertion slot or, as shown in Fig. 1, 1a, 2, from free-running rollers that give the wire a firm guide.
  • the freely rotatable rollers 1 to 5, 11 to 14 shown in FIGS. 1 and 1a represent a forming zone.
  • the rollers embody a curve consisting of wave crests and troughs, through which the wire W passes through the action of the driving force Z, on the latter Surface of the wire is molded under guidance in a prismatic roller profile.
  • Rolls 1 to 5 - the forming zone can consist of any number of rolls - can be fixed or can be adjusted horizontally and vertically. In the simplest case, they are fixed.
  • the rollers 11 to 14 are adjustable for inserting the wire and for adjusting the degree of deformation, at least vertically, optionally also horizontally.
  • the shaft amplitude 22 according to FIG. 2 and thus the roller wrap through the wire can be adjusted.
  • the wavelength 21 can also be adjusted.
  • the diameter d1 denotes the diameter of the elongated wire and the diameter 1 0 the diameter of the incoming wire to be elongated.
  • the curvature of the wave crests and troughs can be influenced by rollers with different values (exchange of rollers) or sometimes by increasing the retraction force R (see Fig. 1), which ensures that the wire adheres to the surface of the roller forms and assumes the pre-calculated radius of curvature.
  • the elongation of the wire takes place to a geometrically metered extent in the run-up area or in the transition 23.0 and 23.2 (see Fig. 2); Because of the uniform elongation so forced, there is no local constriction of the wire. A further elongation occurs in the drainage area 23.1 and 23.3.
  • the elongation The process is such that the wire in the transition areas from the concave to the convex curvature of the curve and vice versa in the plastic or in the partially plastic state is alternately elongated on one side by bending (23.0; 23.2), then in the tangent-like area due to the longitudinal tension straightened (23.1; 23.3), ie stretched or stretched between wave crest and valley and vice versa by pure longitudinal tension.
  • this compression of the elongated wire 44 can be carried out in a straightening set which can expediently be circulated about its longitudinal axis, for example by means of conveying the wire, e.g.
  • finely adjustable roller straightening set 55 by means of drive roller sets 56, 57, of which the rear 57 - compared to the set 56 only with (0.999 to 0.97) times the speed of the set 56 running - acting on the wire 44 in the direction of the arrow 45 in an inhibiting manner.
  • the elongated wire is passed in a free zone 43, which it is secured against buckling by means of guide 54 under the action of drive roller sets 52, 53, of which the set 53 runs 1% o to 3% slower than the set 52 and thus has a flow-restricting effect in the direction of the arrow 45.
  • the straightening set designed as a roller straightening set, can alternatively also be arranged in a rotationally stationary manner.
  • the drive rollers 57 which are only provided if necessary, can also be driven at the speed V 5 , since an inhibiting force 45 also builds up when the straightening rollers 55 are provided in sufficient numbers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
EP79102196A 1978-07-13 1979-06-29 Procédé pour allonger, par un procédé de formage à froid, un fil d'acier obtenu par laminage à chaud, leguel fil présente un diamètre do jusqu'à 20mm par exemple, et une teneur en carbone comprise entre 0,1% et 1%, et dispositif pour la mise en oeuvre dudit procédé Withdrawn EP0008625A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782830890 DE2830890C2 (de) 1978-07-13 1978-07-13 Verfahren zum mit einer Durchmesserabnahme einhergehendem Verlängern von warmgewalztem, einen Ausgangsdurchmesser d" bis bspw. 20 mm aufweisenden Runddraht von 0,1 bis 1 % Kohlenstoffgehalt durch Hochgrad-Kaltumformen und Einrichtung zur Durchführung des Verfahrens
DE2830890 1978-07-13

Publications (1)

Publication Number Publication Date
EP0008625A1 true EP0008625A1 (fr) 1980-03-19

Family

ID=6044327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102196A Withdrawn EP0008625A1 (fr) 1978-07-13 1979-06-29 Procédé pour allonger, par un procédé de formage à froid, un fil d'acier obtenu par laminage à chaud, leguel fil présente un diamètre do jusqu'à 20mm par exemple, et une teneur en carbone comprise entre 0,1% et 1%, et dispositif pour la mise en oeuvre dudit procédé

Country Status (2)

Country Link
EP (1) EP0008625A1 (fr)
DE (1) DE2830890C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423592A1 (fr) * 1989-10-17 1991-04-24 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Dispositif pour cintrer et redresser des profilés
CN111633101A (zh) * 2020-06-10 2020-09-08 燕山大学 一种板材反复变薄弯曲强变形工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2921445A1 (de) * 1979-05-26 1981-04-16 Hubert Ing.(grad.) 5779 Eslohe Mathweis Maschine fuer das richten von langgestreckten metallischem gut
EP0054605A3 (fr) * 1980-12-20 1982-08-18 Th. Kieserling & Albrecht GmbH & Co. Machine à dresser à six rouleaux à dresser, ou davantage, disposés obliquement
AU6999594A (en) * 1993-06-04 1995-01-03 Maschinenfabrik Niehoff Gmbh & Co. Kg Process and device for modifying the cross-section of elongate goods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182277B (de) * 1956-08-06 1964-11-26 Stefan Keller Dipl Ing Verfahren zur Erhoehung der Streckgrenze und der Festigkeit von Walzstahlerzeugnissen, insbesondere von Betonbewehrungsstaehlen und Vorrichtung zur Durchfuehrung des Verfahrens
DE1452981A1 (de) * 1964-06-11 1969-03-13 Ferrotest Gmbh Verfahren zum Richten von Stab- bzw. Drahtmaterial aus Stahl
DE2214768A1 (de) * 1972-03-25 1973-10-31 Fuenter Schuh Verfahren zur herstellung von blankstahl
DE2651812A1 (de) * 1975-11-14 1977-05-26 Reinforcing & Allied Ind Propr Verfahren und vorrichtung zum kaltformen von langgestreckten stahlwerkstuecken

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182277B (de) * 1956-08-06 1964-11-26 Stefan Keller Dipl Ing Verfahren zur Erhoehung der Streckgrenze und der Festigkeit von Walzstahlerzeugnissen, insbesondere von Betonbewehrungsstaehlen und Vorrichtung zur Durchfuehrung des Verfahrens
US3256725A (en) * 1956-08-06 1966-06-21 Keller Julius Stefan Stretching method and apparatus
DE1452981A1 (de) * 1964-06-11 1969-03-13 Ferrotest Gmbh Verfahren zum Richten von Stab- bzw. Drahtmaterial aus Stahl
DE2214768A1 (de) * 1972-03-25 1973-10-31 Fuenter Schuh Verfahren zur herstellung von blankstahl
DE2651812A1 (de) * 1975-11-14 1977-05-26 Reinforcing & Allied Ind Propr Verfahren und vorrichtung zum kaltformen von langgestreckten stahlwerkstuecken

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423592A1 (fr) * 1989-10-17 1991-04-24 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Dispositif pour cintrer et redresser des profilés
US5115657A (en) * 1989-10-17 1992-05-26 M.E.P. Macchine Elettroniche Piegatrici Combined assembly to straighten and linearize sections
CN111633101A (zh) * 2020-06-10 2020-09-08 燕山大学 一种板材反复变薄弯曲强变形工艺

Also Published As

Publication number Publication date
DE2830890C2 (de) 1980-06-04
DE2830890B1 (de) 1979-09-27

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

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Effective date: 19820217

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Inventor name: KELLER, STEFAN, DIPL.-ING.