US2146223A - Production of profiled sections from sheet metal by rolling - Google Patents

Production of profiled sections from sheet metal by rolling Download PDF

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Publication number
US2146223A
US2146223A US149217A US14921737A US2146223A US 2146223 A US2146223 A US 2146223A US 149217 A US149217 A US 149217A US 14921737 A US14921737 A US 14921737A US 2146223 A US2146223 A US 2146223A
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United States
Prior art keywords
pressure
rolling
section
rollers
metal
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Expired - Lifetime
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US149217A
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English (en)
Inventor
Penkala Emil
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Metal Trim Ltd
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Metal Trim Ltd
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Publication date
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Publication of US2146223A publication Critical patent/US2146223A/en
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    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers

Definitions

  • This invention relates to the production of profiled sections and-tubes by rolling from sheet metal, andhas among its objects to obviate or to reduce to a minimum stretching of the ma- 5 terial in the longitudinal. direction, for instance at theedges or marginal partsof .the section, whichstretchingis liable to result in theformation of waves or corrugations which are difficult to eliminate in subsequent operations, to reduce to aminimumllateral. stretching of thematerial and. consequent further thinningof the same atthe corners or bent parts of the section, and generally to enableprofiled sections to be produced .with a comparatively low rolling pressure 5 wherebylthe size of the rollers, diameter of the spindles: carrying the :same, and the power employedmay be very substantially reduced.
  • therollers of each pass are profiled so as to correspond exactlyto the profile of the section at .theparticular position. It has, however, been proposed to profile the rollers so that the materialis gripped by the, rollers at or adjacenttheedges or marginal parts of the section andcis: left substantially free at the corner or bend. :In this. prior proposal the application of thepressure at the edges or marginal parts would tend to increase the usual longitudinal stretching action. It has also been proposed to profile the rollers in such maner that the pressure is confined .to the corner or bent portion of the section. In such an arrangement pressure onthe longitudinally stretched parts is avoided, but inasmuch as the pressure is concentrated on ,the laterally stretched parts at the bend or corner, such lateral stretching, with.its accompanying thinning of the metal, would be increased.
  • the profiled sections are produced by rolling from sheet metal by passing the metal between rollers which ,are profiled so that the pressure of the rollers onthe material is confined to intermediate parts of the section which are not stretched. or subject to stretching during the profiling operations. More specifically, the invention embraces a method wherein the rolling. pressure is applied :at and confined to parts of thesection at which there is no, or substantially no, tendency. to 1on- I gitudinal or lateral stretching, the pressure preferablynbeing confined to positions adjacentthe bend orbends in the section, but not at such bend or bends.
  • the pressure preferablynbeing confined to positions adjacentthe bend orbends in the section, but not at such bend or bends.
  • the regions of pressure in successive passes are arranged at different positions in the walls or flanks of the section so as to overlap.
  • any grooves or lines resulting from the .10 localized pressure in one pass will be eliminated in a succeeding pass.
  • each;pasS is duplicated or multiplied so that while the material is in any one forma 15 tion or stage of formation it is subject to at least two rolling pressures localized at different overlapping parts of the section wall .or walls.
  • Figures 2 to 4 are similar views illustrating stages in the formation of .a U or tubularsection; and I Figures 5 to 8 are similar views illustrating successive stages in the formation of a U or channel section according to a modification of the aforesaid method.
  • the metal strip 1 is passed between the profiled rollers 2, 3 by which it is upper roller 2 is shaped sothat the roller profiles at the-parts between which the walls orfianlgs of the sectioncare. disposed; are non-parallel :and 5-55 diverge as indicated by the angle a: degrees in a direction away from the bend in the strip.
  • the lower roller 3 is formed with a circumferential groove or recess 3a so as to avoid any application of pressure at or immediately adjacent the bend in the strip.
  • the rolling pressure is localized substantially at the parts a of the metal strip.
  • This localized pressure not only avoids any intensification of longitudinal stretching at the edges of the strip during the profiling operation, but tends to compensate for any such stretching that may occur, inasmuch as the localized pressure acting near the bend in the section tends to cause a certain amount of elongation of the metal strip at the bend and by suitable design of the rollers any stretching at the edges may be neutralized entirely by the said elongation at the bend.
  • the inclined faces of the upper roll 2 act in a downward direction on the strip, the localized pressure tends to upset the metal towards the bend and thus neutralizes any tendency to thinning of the metal at this point.
  • a U or tubular section is produced by passing between successive pairs of rollers 4, 5, 6, 1 and 8, 9, the upper roller in each case being shaped similarly to the roller 2 in Figure 1 so that the pressure on the section is localized at the parts a.
  • the localized pressure in the manner described renders it possible to produce profiled sections with a very much lower rolling pressure than was heretofore possible, but such localized pressure sometimes results in the formation of slight grooving Or line-marking of the section.
  • the localized pressure is in successive passes exerted or laterally displaced and overlapping portions of the metal stri A shown in Figure 5, which illustrates a first stage in the formation, for example, of a U or channelled section, the upper roller I0 is shaped on the inclined sides so that the pressure on the walls or fianks of the section la is localized at the parts a as before described.
  • the roller I0 is formed with a centrally disposed circumferential groove or recess Illa so that the pressure on the central portion of the section is localized at the parts a
  • the same result may be secured by providing a centrally disposed circumferential groove or recess Ila in the lower roller H or, if desired, both rollers may be provided with the grooves.
  • the upper roller I2 is formed with two circumferential grooves or recesses
  • the lower roller l3 likewise may be provided with circumferential grooves or recesses Hot, in which case the grooves I2a may be dispensed with.
  • the upper roller I4 is formed with a centrally disposed circumferential groove or recess la the width of which is less than the width of the pressure region a. in Figure 6, whereby the rolling pressure on the central portion of the section is localized at the parts a which overlap the part a in the preceding pass.
  • the lower roller ii in this pass also may be formed with a centrally disposed groove or recess corresponding to the groove or recess l4a.
  • rollers [6, ll may be profiled to correspond to the final profile of the section la.
  • all the upper rollers are relieved in the manner described with reference to Figure 1 so that the pressure on the section walls or flanks is applied at the parts a adjacent the bend or corner. If desired, however, the upper rollers may be relieved in any other suitable manner for the same purpose.
  • the metal may be upset towards the bend or corner with a comparatively low pressure on the rollers, and such upsetting may serve to increase the thickness of the section at the bend or corner.
  • rollers suitably relieved or recessed to avoid the application of pressure at any parts subject to stretching or which have been stretched longitudinally or laterally, or rollers in accordance with my copending application Serial Number 149,219, filed June 19, 1937, advantageously are employed, it being understood that although a slight relieving of the rollers is sufificient for the purpose, recesses of substantial depth are permissible.
  • the invention while being of general application in the rolling of profiled sections from sheet metal, is particularly applicable for use in connection with the rolling method and apparatus according to my prior application Serial Number 149,216, filed June 19, 1937, and according to my further co-pending applications Serial Numbers 149,218 and 149,220, both filed June 19, 1937.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US149217A 1936-06-29 1937-06-19 Production of profiled sections from sheet metal by rolling Expired - Lifetime US2146223A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2146223X 1936-06-29

Publications (1)

Publication Number Publication Date
US2146223A true US2146223A (en) 1939-02-07

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ID=10899742

Family Applications (1)

Application Number Title Priority Date Filing Date
US149217A Expired - Lifetime US2146223A (en) 1936-06-29 1937-06-19 Production of profiled sections from sheet metal by rolling

Country Status (4)

Country Link
US (1) US2146223A (en:Method)
BE (1) BE422323A (en:Method)
FR (1) FR823627A (en:Method)
GB (1) GB477592A (en:Method)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649890A (en) * 1952-04-02 1953-08-25 Dunlap Machine and method for producing corner beads for use in dry-built construction
US3126043A (en) * 1964-03-24 Simon
US5943892A (en) * 1997-09-01 1999-08-31 Sanyo Seiki Co., Ltd. Method of breakdown-forming electro-unite tubes
EP0988905A3 (en) * 1998-08-24 2000-05-03 Kusakabe Electric & Machinery Co., Limited Tube forming machine using three point bending
WO2009115858A1 (en) * 2008-03-20 2009-09-24 Sidel Participations Coupling device for an article handling machine
CN103286170A (zh) * 2013-06-14 2013-09-11 宜昌船舶柴油机有限公司 超长双u型导轨制作方法
RU2824790C1 (ru) * 2023-05-16 2024-08-13 Общество с ограниченной ответственностью "Уральское конструкторское бюро вагоностроения" Гнутый швеллерный профиль

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0430942A4 (en) * 1988-08-30 1991-08-07 Kpg Integrated Eng Pty Ltd Contouring of metal sheets

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126043A (en) * 1964-03-24 Simon
US2649890A (en) * 1952-04-02 1953-08-25 Dunlap Machine and method for producing corner beads for use in dry-built construction
US5943892A (en) * 1997-09-01 1999-08-31 Sanyo Seiki Co., Ltd. Method of breakdown-forming electro-unite tubes
EP0988905A3 (en) * 1998-08-24 2000-05-03 Kusakabe Electric & Machinery Co., Limited Tube forming machine using three point bending
WO2009115858A1 (en) * 2008-03-20 2009-09-24 Sidel Participations Coupling device for an article handling machine
US20110085849A1 (en) * 2008-03-20 2011-04-14 Sidel Participations Coupling device for an article handling machine
CN102026908A (zh) * 2008-03-20 2011-04-20 西德尔合作公司 用于物品处理机器的联接装置
CN103286170A (zh) * 2013-06-14 2013-09-11 宜昌船舶柴油机有限公司 超长双u型导轨制作方法
CN103286170B (zh) * 2013-06-14 2015-07-01 宜昌船舶柴油机有限公司 超长双u型导轨制作方法
RU2824790C1 (ru) * 2023-05-16 2024-08-13 Общество с ограниченной ответственностью "Уральское конструкторское бюро вагоностроения" Гнутый швеллерный профиль

Also Published As

Publication number Publication date
GB477592A (en) 1937-12-29
BE422323A (en:Method) 1937-07-31
FR823627A (fr) 1938-01-24

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