US3811309A - Method and apparatus for cold drawing or rolling of metal wire rod - Google Patents

Method and apparatus for cold drawing or rolling of metal wire rod Download PDF

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Publication number
US3811309A
US3811309A US00287227A US28722772A US3811309A US 3811309 A US3811309 A US 3811309A US 00287227 A US00287227 A US 00287227A US 28722772 A US28722772 A US 28722772A US 3811309 A US3811309 A US 3811309A
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United States
Prior art keywords
rolls
wire rod
oval
round groove
round
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Expired - Lifetime
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US00287227A
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English (en)
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K Nordstrom
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • 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
    • 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
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/08—Dies; Selection of material therefor; Cleaning thereof with section defined by rollers, balls, or the like

Definitions

  • ABSTRACT A method and apparatus for wire drawing using the [30] Forelgn Appllc ahon Pnomy Data oval-round series in which wire rod is fed through the Sept. 10, 1971 SWltZel'lZlfld round groove rolls in a manner Such rected forces having the same direction are imposed on both round groove rolls thereby preventing dis- 58] i 72/234 5 366 231 placement of the rolls in opposite directions and stabilizing the wire rod in the round groove. 6 Claims; 12 Drawing Figures PATENTEDmm m4 3.811.309
  • a reduction series very often used in wire drawing is the oval-round series in which the wire rod is first formed in a pair of rolls to oval cross section and, immediately thereafter, in subsequent roll pairs is formed to a given round cross section.
  • the round groove rolls normally are positioned in a plane which is at an angle of 90 relative to the plane of the oval groove rolls, the reason for this being that it eliminates the necessity of turning the oval shaped wire through 90, as is sometimes done in hot rolling and which requires substantial guide equipment.
  • roller die unit refers to a set of nondriven rolls of which the first roll pair, in the drawing direction, has oval grooves and the second roll pair has round grooves.
  • the two roll pairs are set at an angle of 90 relative to each other but the center line of the roll path defined by the two roll pairs are aligned and coaxial.
  • FIG. 1 is a schematic illustration of a conventional prior art cold wire drawing process
  • FIG. la is a view taken along line la-la of FIG. I;
  • FIG. 1b is a view taken along line lb--Ib of FIG. 1;
  • FIGS. 2A-D are schematic graphic presentations of the problem solved by the instant invention.
  • FIG. 3 is a diagrammatic illustration of the displacement of the rolls relative to each other which takes place with the prior art arrangement
  • FIG. 4 is a schematic illustration of one embodiment of the invention.
  • FIG. 4a is a view along line 4a4a of FIG. 4;
  • FIG. 4b is a view along line 4h4b of FIG. 4;
  • FIG. 5 is a schematic presentation of the cold wire drawing process and-the forces created using the solution of FIG. 4.
  • FIG. 1 illustrates a conventional roller die" unit used in an oval-round series and comprises one roll pair I, 2 defining an oval groove 6 and a second roll pair 3, 4 defining a round groove 7 Roll pair 3, 4 lie in a plane that is rotated by 90 from the plane of the roll pair 1, 2 (see FIG. 1B).
  • the wire rod to be drawn is designated by the numeral 5. Subsequentto its forming to oval section,
  • FIG. 1B the wire rod is designated at 5' and subsequent to its forming to a round shape is designated at 5".
  • FIGS. 2A-D illustrate the problem solved by this invention.
  • FIG. 2A presents the desired theoretical relationship between the round groove 7 and the oval wire rod 5 as it enters the round groove.
  • the major axis of the oval cross section lies in a plane which is perpendicular to the axis of each of the rolls 3 and 4.
  • FIGS. 28 and 2C illustrate the problem which occurs when the oval wire rod 5' enters the round groove 7 in I an unstable condition.
  • FIG. 2B shows the rolls 3, 4 as being axially displaced in opposite directions which results from the oval wire rod being slightly inclined to the right as viewed in FIG. 28.
  • FIG. 2C illustrates how the two rolls 3, 4 are axially offset in the opposite 7 direction when the oval wire rod. enters the groove 7 inclined to the left, as viewed in that Figure.
  • FIG. 2D schematically presents the forces that act on I.
  • the rolls 3, 4 to cause axial displacement of the rolls in the manner shown in FIG. 2B.
  • the oval wire rod is subjected to a rolling pressure P,. due to the height of the rod exceeding the depth of the groove 7.
  • the wire rod is inclined such that its major axis is no longer perpendicular to the axis of the rolls, the wire rod is subjected to a torsional movement M,..
  • the moment of reaction of the wire rod consists of a torsional resistance in the wire rod and axial forces P acting on the rolls 3, 4.
  • the rolls 3, 4 will move axially in opposite directions until the play has been eliminated and the wire rod will then achieve a state of balance in which the moment of the axial forces P,, r and the torsional moment neutralize the moment caused by the rolling force P...
  • the magnitude of the axial displacement of each roll depends on the play that is present in the bearings and mountings and. further; on the elasticity of the material.
  • FIG. 3 is a graphical presentation of these factors wherein the portion above the abscissa represents the upper roll and the portion below the abscissa represents the lower roll.
  • the movement in axial direction which any pointfof any of the rolls can be displaced has been plotted along the abscissa.
  • the points a and h indicate the total play in each direction as a function of the construction of the bearings and mountings.
  • the elasticity ofthe material, as a function of the forces P has been superposed on points a and b with the total displacement, for a given force P appearing from the points c and d.
  • This invention proposes to solve the foregoing problem in themanner illustrated in FlG. 4.
  • the roll pairs 1, 2 and 3, 4 are arranged such that the rolls 3, 4 are offset from the roll path through rolls 1, 2 by a distance A.
  • Oval wire rod 5 fed through rolls 3, 4 creates forces 8 which act on the two rolls in the direction indicated in H0. 4.
  • the magnitude of the axial forces 8 is a function of the tensile stress P prevailing in the wirerod 5' between the roll pairs 1, 2 and 3, 4 and the incli nation a of the wire rod to the normal rolling path between the roll pairs.
  • the magnitude of this force will be substantially smaller than the axial component of P,.. See FIGS. 2D and 4.
  • FIG. 4A shows a section along the line A-A in FIG. 4 and illustrates how-the oval wire rod 5 enters the round groove 7.
  • FIG. 4B shows a section along the line BB in FIG. 4 and illustrates the displacement of the oval groove rolls in relation tothe round groove rolls.
  • either roll pair may be offset from the other to achieve the relationship shown in FIG. 4.
  • the same end result may be obtained by maintaining the normal coaxial roll path and instead of shifting roll pairs, forcing the wire rod in a lateral direction by means of guide rollers.
  • Such rollers may be placed between the roll pairs as well as after the round groove rolls, the essential point being that the wire rod acts on the round groove rolls to subject them to forces having the same direction.
  • a method of establishing and maintaining a stable and correct position of metal wire rod having an oval cross section in a round groove during cold rolling or drawing with a roller die unit which includes a pair of oval groove rolls and a pair of round groove rolls comprising the step of feeding the wire rod through the round groove rolls at an angle to the centerline of the roll path through the rolls to cause the wire rod to impose axial forces on each of the rolls with the axial forces acting in the same direction.
  • Apparatus for cold rolling or drawing of metal wire rod including a roller die unit comprising a pair of oval groove rolls for shaping the wire rod to an oval cross section and a pair of round groove rolls for shaping the oval wire rod to a round cross section, the improvement comprising one of said pair of rolls being offset in the axial direction of said round groove rolls relative to the other pair of rolls whereby the oval wire rodenters said round groove rolls at an angle to the roll path and imposes axial forces acting in the same direction on said round groove rolls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Metal Rolling (AREA)
US00287227A 1971-09-10 1972-09-08 Method and apparatus for cold drawing or rolling of metal wire rod Expired - Lifetime US3811309A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE11495/71A SE369152B (xx) 1971-09-10 1971-09-10

Publications (1)

Publication Number Publication Date
US3811309A true US3811309A (en) 1974-05-21

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Application Number Title Priority Date Filing Date
US00287227A Expired - Lifetime US3811309A (en) 1971-09-10 1972-09-08 Method and apparatus for cold drawing or rolling of metal wire rod

Country Status (10)

Country Link
US (1) US3811309A (xx)
JP (1) JPS4856559A (xx)
DD (1) DD104439A5 (xx)
DE (1) DE2243894A1 (xx)
ES (1) ES406507A1 (xx)
FR (1) FR2152712B3 (xx)
GB (1) GB1366015A (xx)
IT (1) IT967306B (xx)
NL (1) NL7212231A (xx)
SE (1) SE369152B (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4949567A (en) * 1988-11-04 1990-08-21 Corbin Edward W Apparatus and method for control of wire cast and helix
US5516408A (en) * 1993-04-19 1996-05-14 Magma Copper Company Process for making copper wire
US5679232A (en) * 1993-04-19 1997-10-21 Electrocopper Products Limited Process for making wire
US5830583A (en) * 1993-04-19 1998-11-03 Clouser; Sidney J. Copper wire
US6123788A (en) * 1993-04-19 2000-09-26 Electrocopper Products Limited Copper wire and process for making copper wire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102513392A (zh) * 2011-12-30 2012-06-27 江阴市威尔巨拉科技有限公司 拉丝机辊模装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105258A (en) * 1933-11-27 1938-01-11 Morgan Construction Co Method of and apparatus for rolling rounds
US2140414A (en) * 1936-09-05 1938-12-13 Brownstein Benjamin Continuous tube or bar rolling mill
US2369730A (en) * 1942-06-12 1945-02-20 Gustaf L Fisk Method of rolling metal bars
US3564891A (en) * 1967-06-22 1971-02-23 Morgaardshammar Ab Continuous rolling mills and/or repeater rolling mills

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105258A (en) * 1933-11-27 1938-01-11 Morgan Construction Co Method of and apparatus for rolling rounds
US2140414A (en) * 1936-09-05 1938-12-13 Brownstein Benjamin Continuous tube or bar rolling mill
US2369730A (en) * 1942-06-12 1945-02-20 Gustaf L Fisk Method of rolling metal bars
US3564891A (en) * 1967-06-22 1971-02-23 Morgaardshammar Ab Continuous rolling mills and/or repeater rolling mills

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4949567A (en) * 1988-11-04 1990-08-21 Corbin Edward W Apparatus and method for control of wire cast and helix
US5516408A (en) * 1993-04-19 1996-05-14 Magma Copper Company Process for making copper wire
US5679232A (en) * 1993-04-19 1997-10-21 Electrocopper Products Limited Process for making wire
US5830583A (en) * 1993-04-19 1998-11-03 Clouser; Sidney J. Copper wire
US6123788A (en) * 1993-04-19 2000-09-26 Electrocopper Products Limited Copper wire and process for making copper wire

Also Published As

Publication number Publication date
IT967306B (it) 1974-02-28
FR2152712B3 (xx) 1975-10-03
DD104439A5 (xx) 1974-03-12
JPS4856559A (xx) 1973-08-08
DE2243894A1 (de) 1973-03-15
NL7212231A (xx) 1973-03-13
FR2152712A1 (xx) 1973-04-27
GB1366015A (en) 1974-09-04
SE369152B (xx) 1974-08-12
ES406507A1 (es) 1975-08-16

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