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US20100199737A1 - Method for producing elongated, peripherally contoured shaped blanks from a metal strip - Google Patents

Method for producing elongated, peripherally contoured shaped blanks from a metal strip Download PDF

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Publication number
US20100199737A1
US20100199737A1 US12/699,527 US69952710A US2010199737A1 US 20100199737 A1 US20100199737 A1 US 20100199737A1 US 69952710 A US69952710 A US 69952710A US 2010199737 A1 US2010199737 A1 US 2010199737A1
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US
United States
Prior art keywords
blanks
starting
metal strip
shaped
rolling mill
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.)
Abandoned
Application number
US12/699,527
Inventor
Markus Pellmann
Stefan Adelbert
Otto Buschsieweke
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
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 Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Assigned to BENTELER AUTOMOBILTECHNIK GMBH reassignment BENTELER AUTOMOBILTECHNIK GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ADELBERT, STEFAN, BUSCHSIEWEKE, OTTO, PELLMANN, MARKUS
Publication of US20100199737A1 publication Critical patent/US20100199737A1/en
Abandoned 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49764—Method of mechanical manufacture with testing or indicating
    • Y10T29/49771—Quantitative measuring or gauging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece

Definitions

  • the invention relates to a method for producing elongated, peripherally contoured shaped blanks from a metal strip according to the features of the preamble of claim 1 .
  • chassis parts Peripherally contoured, elongated shaped blanks as a starting material for chassis parts of automobiles are known. Such chassis parts are used to produce, for example, A, B or C columns. Such components are subject to different stress in different longitudinal sections. For this reason, the wall thickness is changed in certain regions to optimally adapt to stress present at different heights while also minimizing material consumption.
  • interleaved starting blanks with a constant thickness are initially stamped from a metal strip.
  • the position of the initial blanks is then selected depending on their desired peripheral contours so as to optimize utilization of the metal strip.
  • waste can be reduced between 10% and 30% by suitable interleaving. The economy of the process and the yield are significantly improved.
  • the starting blanks are stamped and subsequently guided separately through a rolling mill in their longitudinal direction and rolled into shaped blanks with regions of thickness that vary over the length of the shaped blanks.
  • the fact that the material is elongated when the starting blanks are rolled into the shaped blanks has to be taken into account when planning the interleaved positions of the starting blanks on the metal strip.
  • the invention has proven to be particularly advantageous when the shaped blanks have a substantially T-shaped periphery.
  • starting blanks with a periphery having a substantially T-shaped contour are arranged with interleaved transverse or longitudinal positions in relation to the longitudinal direction of the metal strip and stamped out.
  • the stamped-out starting blanks are then separately rolled into shaped blanks, before they are shaped in an additional contouring step into shaped bodies, such as for example A, B or C columns of an automobile chassis.
  • the starting blanks are according to claim 3 guided through the rolling mill with an effective pretension along their longitudinal direction. This can be accomplished with suitable devices.
  • the thickness of the stamped starting blanks is measured according to claim 4 before insertion into a rolling mill.
  • the starting blanks are then rolled in the rolling mill into shaped blanks by taking into account the measured thickness tolerances.
  • starting blanks can be stamped from individual metal strips, such as sheet metal, or the stamping process can be integrated into a continuous production sequence.
  • the features of claim 5 provide that the starting blanks are stamped from a steel tape unwound from a coil. The starting blanks are then guided through a rolling mill separately and along their longitudinal orientation, where they are rolled into shaped blanks having different thickness regions.
  • FIG. 1 shows in a top view a longitudinal section of a steel tape
  • FIG. 2 shows in a top view a starting blank stamped from the steel tape
  • FIG. 3 shows schematically in a side view a starting blank before, during and after passage to a rolling mill
  • FIG. 4 shows a top view on the illustration of FIG. 3 ;
  • FIG. 5 shows in a top view a shaped blanks rolled from the starting blank.
  • the reference symbol 1 indicates a metal strip as component of a steel tape 2 of unspecified length and constant thickness D over its entire length.
  • the steel tape 2 can be drawn from an unillustrated coil.
  • the steel tape 2 is moved through an unillustrated stamping tool, where contoured starting blanks 3 having an essentially T-shaped periphery are stamped from the steel tape 2 , as illustrated in FIG. 2 .
  • the stamping operation is performed in that the starting blanks 3 are stamped out from the steel tape 2 , wherein the starting blanks 3 are arranged on the steel tape 2 in an interleaved pattern oriented transverse to the longitudinal direction of the steel tape 2 .
  • the amount of residual material 4 left behind, i.e. waste material is significantly reduced compared to a stamping operation in which the starting blanks are cut out parallel to the longitudinal direction of the steel tape 2 .
  • the planned interleaved position of the starting blanks 3 before stamping is indicated in FIG. 1 by hatching.
  • the starting blanks 3 can also be arranged on the steel tape 2 so as to be interleaved in the longitudinal direction of the steel tape 2 , whereafter they are stamped out.
  • the starting blanks 3 are stamped out, they are guided through the roiling mill 5 with a longitudinal orientation, as shown in FIGS. 3 and 4 , where they are rolled into shaped blanks 6 commensurate with the respective predefined dimensions with regions A, B, C of different thickness that vary over the length L (see also FIG. 5 ).
  • the starting blanks 3 When the starting blanks 3 are rolled, they are guided through the rolling mill 5 with an effective pretension that varies in the longitudinal direction of the starting blanks 3 . This is done using conventional equipment which are not illustrated in detail in the Figures.
  • the thickness D 1 of the starting blanks 3 is measured before their insertion in the rolling mill 5 , whereafter they are rolled in the rolling mill 5 into shaped blanks 6 , taking into consideration the measured thickness tolerances, as indicated in FIGS. 3 to 5 .
  • the shaped blank 6 of FIGS. 3 to 5 is different from a starting blank according to FIGS. 2 to 4 in that the starting blank 3 has a length L that is shorter than the length L 1 of the shaped blank 6 , because the starting blank 3 is elongated as a result of the rolling operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Metal Rolling (AREA)
  • Punching Or Piercing (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

In the method for producing from a metal strip peripherally contoured, elongated shaped blanks (6) having regions of different thickness along their length (L1), starting blanks (3) are first stamped from a metal strip having a constant thickness wherein the starting blanks are arranged at interleaved positions in the longitudinal direction of the metal strip. The starting blanks are subsequently guided separately through a rolling mill (5) with a longitudinal orientation and rolled in the rolling mill (5) into shaped blanks (6) having regions of different thickness.

Description

  • The invention relates to a method for producing elongated, peripherally contoured shaped blanks from a metal strip according to the features of the preamble of claim 1.
  • Peripherally contoured, elongated shaped blanks as a starting material for chassis parts of automobiles are known. Such chassis parts are used to produce, for example, A, B or C columns. Such components are subject to different stress in different longitudinal sections. For this reason, the wall thickness is changed in certain regions to optimally adapt to stress present at different heights while also minimizing material consumption.
  • In this context, it is known to unwind steel tapes from coils and guide them through rolling mills. The distance between the rollers of the rolling mills is hereby controlled so that the steel tapes passing through are provided with different thicknesses in different regions. The deformed steel tapes are subsequently guided through presses where peripherally contoured, elongated shaped blanks are stamped out and subsequently moved for additional processing.
  • By taking into consideration that the shaped blanks are stamped out after the steel tapes were rolled and the sectional thickness regions of the steel tapes extend over the entire width, material utilization is unsatisfactory, in particular when the shaped blanks have pronounced peripheral contours. Material waste is high.
  • Based on this conventional approach, it is an object of the invention to provide a method for producing peripherally contoured, elongated shaped blanks with regions of different thickness along their length, wherein material utilization of the starting material is significantly improved.
  • The object is solved with the invention by the features of claim 1.
  • According to this proposal, interleaved starting blanks with a constant thickness are initially stamped from a metal strip. The position of the initial blanks is then selected depending on their desired peripheral contours so as to optimize utilization of the metal strip. Depending on the desired contour, waste can be reduced between 10% and 30% by suitable interleaving. The economy of the process and the yield are significantly improved.
  • The starting blanks are stamped and subsequently guided separately through a rolling mill in their longitudinal direction and rolled into shaped blanks with regions of thickness that vary over the length of the shaped blanks. The fact that the material is elongated when the starting blanks are rolled into the shaped blanks has to be taken into account when planning the interleaved positions of the starting blanks on the metal strip.
  • The invention has proven to be particularly advantageous when the shaped blanks have a substantially T-shaped periphery. According to claim 2, starting blanks with a periphery having a substantially T-shaped contour are arranged with interleaved transverse or longitudinal positions in relation to the longitudinal direction of the metal strip and stamped out. The stamped-out starting blanks are then separately rolled into shaped blanks, before they are shaped in an additional contouring step into shaped bodies, such as for example A, B or C columns of an automobile chassis.
  • To prevent undesirable contour deviations of the finished rolled shaped blanks, the starting blanks are according to claim 3 guided through the rolling mill with an effective pretension along their longitudinal direction. This can be accomplished with suitable devices.
  • To take into account potential thickness tolerances in a provided metal strip, the thickness of the stamped starting blanks is measured according to claim 4 before insertion into a rolling mill. The starting blanks are then rolled in the rolling mill into shaped blanks by taking into account the measured thickness tolerances.
  • With the invention, starting blanks can be stamped from individual metal strips, such as sheet metal, or the stamping process can be integrated into a continuous production sequence. In this context, the features of claim 5 provide that the starting blanks are stamped from a steel tape unwound from a coil. The starting blanks are then guided through a rolling mill separately and along their longitudinal orientation, where they are rolled into shaped blanks having different thickness regions.
  • The invention will now be described based on an exemplary embodiment illustrated in the drawings.
  • FIG. 1 shows in a top view a longitudinal section of a steel tape;
  • FIG. 2 shows in a top view a starting blank stamped from the steel tape;
  • FIG. 3 shows schematically in a side view a starting blank before, during and after passage to a rolling mill;
  • FIG. 4 shows a top view on the illustration of FIG. 3; and
  • FIG. 5 shows in a top view a shaped blanks rolled from the starting blank.
    •
  • In FIG. 1, the reference symbol 1 indicates a metal strip as component of a steel tape 2 of unspecified length and constant thickness D over its entire length. The steel tape 2 can be drawn from an unillustrated coil. The steel tape 2 is moved through an unillustrated stamping tool, where contoured starting blanks 3 having an essentially T-shaped periphery are stamped from the steel tape 2, as illustrated in FIG. 2. As shown in FIG. 1, the stamping operation is performed in that the starting blanks 3 are stamped out from the steel tape 2, wherein the starting blanks 3 are arranged on the steel tape 2 in an interleaved pattern oriented transverse to the longitudinal direction of the steel tape 2. The amount of residual material 4 left behind, i.e. waste material, is significantly reduced compared to a stamping operation in which the starting blanks are cut out parallel to the longitudinal direction of the steel tape 2. The planned interleaved position of the starting blanks 3 before stamping is indicated in FIG. 1 by hatching.
  • According to an unillustrated embodiment, the starting blanks 3 can also be arranged on the steel tape 2 so as to be interleaved in the longitudinal direction of the steel tape 2, whereafter they are stamped out.
  • After the starting blanks 3 are stamped out, they are guided through the roiling mill 5 with a longitudinal orientation, as shown in FIGS. 3 and 4, where they are rolled into shaped blanks 6 commensurate with the respective predefined dimensions with regions A, B, C of different thickness that vary over the length L (see also FIG. 5).
  • When the starting blanks 3 are rolled, they are guided through the rolling mill 5 with an effective pretension that varies in the longitudinal direction of the starting blanks 3. This is done using conventional equipment which are not illustrated in detail in the Figures.
  • In addition, the thickness D1 of the starting blanks 3 is measured before their insertion in the rolling mill 5, whereafter they are rolled in the rolling mill 5 into shaped blanks 6, taking into consideration the measured thickness tolerances, as indicated in FIGS. 3 to 5.
  • The shaped blank 6 of FIGS. 3 to 5 is different from a starting blank according to FIGS. 2 to 4 in that the starting blank 3 has a length L that is shorter than the length L1 of the shaped blank 6, because the starting blank 3 is elongated as a result of the rolling operation.
    • REFERENCE SYMBOLS
  • 1 Metal strip
    2 Steel tape
    3 Starting blank
    4 Residual material
    5 Rolling mill
    6 Shaped blank
    A Thickness region of 6
    B Thickness region of 6
    C Thickness region of 6
    D Thickness of 2
    D1 Thickness of 3
    L Length of 3
    L1 Length of 6
    V Pretension of 3

Claims (6)

1.-5. (canceled)
6. A method for producing peripherally contoured, elongated shaped blanks with longitudinal regions of different thickness from a metal strip, comprising the steps of:
defining on the metal strip positions of starting blanks with an interleaved arrangement, said starting blanks having a longitudinal direction and a thickness;
stamping the starting blanks out of the metal strip;
rolling the stamped-out starting blanks separately along their longitudinal direction in a rolling mill to form shaped blanks having regions of different thickness along the longitudinal direction of the shaped blanks.
7. The method of claim 6, wherein the stamped-out starting blanks have a periphery with an essentially T-shaped contour and the interleaved arrangement of the starting blanks forms one of a transverse or longitudinal pattern with respect to a lengthwise direction of the metal strip.
8. The method of claim 6, wherein the starting blanks pass through the rolling mill with a pretension applied in the longitudinal direction of the starting blanks.
9. The method of claim 6, and further comprising the step of:
measuring the thickness of the starting blanks before insertion into the rolling mill and
rolling the starting blanks in the rolling mill to form the shaped blanks by taking into consideration measured thickness tolerances.
10. The method of claim 6, wherein the starting blanks are stamped from a metal tape unwound from a coil.
US12/699,527 2009-02-06 2010-02-03 Method for producing elongated, peripherally contoured shaped blanks from a metal strip Abandoned US20100199737A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009007926A DE102009007926A1 (en) 2009-02-06 2009-02-06 Process for the production of circumferentially contoured elongated shaping blanks from a metal strip
DE102009007926.2 2009-02-06

Publications (1)

Publication Number Publication Date
US20100199737A1 true US20100199737A1 (en) 2010-08-12

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US12/699,527 Abandoned US20100199737A1 (en) 2009-02-06 2010-02-03 Method for producing elongated, peripherally contoured shaped blanks from a metal strip

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US (1) US20100199737A1 (en)
EP (1) EP2216109B1 (en)
JP (1) JP5235919B2 (en)
AT (1) ATE510638T1 (en)
DE (1) DE102009007926A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130283881A1 (en) * 2011-06-27 2013-10-31 Muhr Und Bender Kg Process of and Device For Producing Metal Blanks With Different Thicknesses
US20150336617A1 (en) * 2013-09-30 2015-11-26 Hyundai Motor Company Outer panel for pillar of vehicle, and method and rolling apparatus for manufacturing the same
US9234369B2 (en) 2012-03-21 2016-01-12 Carrier Corporation Furnace door latch assembly
US9340233B2 (en) 2010-10-15 2016-05-17 Benteler Automobiltechnik Gmbh Method for producing a hot-formed and press-hardened metal component
US9616488B2 (en) 2011-09-16 2017-04-11 Benteler Automobiltechnik Gmbh Method for producing structural components and chassis components by hot forming, and heating station
US9694408B2 (en) 2012-11-07 2017-07-04 Benteler Automobiltechnik Gmbh Hot forming line and method for producing a hot formed and press hardened motor vehicle part
US20170225208A1 (en) * 2016-02-04 2017-08-10 C.R.F. Societa Consortile Per Azioni Method for rolling metal sheets with variable thickness

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
DE102011001320A1 (en) * 2011-03-16 2012-10-04 Muhr Und Bender Kg Method for manufacturing sheet metal plates, particularly for use in vehicle body or chassis, involves processing strip material in thickness reducing manner, where thickness of strip material is reduced in partial areas
RU2483860C2 (en) * 2011-06-10 2013-06-10 Артем Борисович Петров Method of chamfering
DE102016200520B4 (en) 2015-03-19 2019-10-31 Ford Global Technologies, Llc Method for producing a structural component and rolling device
EP3213834A1 (en) * 2016-03-04 2017-09-06 Benteler Automobiltechnik GmbH Blank cutting device for cutting out a blank elements from a metal strip

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US1576304A (en) * 1921-01-10 1926-03-09 American Fork & Hoe Co Method of and apparatus for making implement sockets
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Publication number Priority date Publication date Assignee Title
US9340233B2 (en) 2010-10-15 2016-05-17 Benteler Automobiltechnik Gmbh Method for producing a hot-formed and press-hardened metal component
US20130283881A1 (en) * 2011-06-27 2013-10-31 Muhr Und Bender Kg Process of and Device For Producing Metal Blanks With Different Thicknesses
US9616488B2 (en) 2011-09-16 2017-04-11 Benteler Automobiltechnik Gmbh Method for producing structural components and chassis components by hot forming, and heating station
US9234369B2 (en) 2012-03-21 2016-01-12 Carrier Corporation Furnace door latch assembly
US9694408B2 (en) 2012-11-07 2017-07-04 Benteler Automobiltechnik Gmbh Hot forming line and method for producing a hot formed and press hardened motor vehicle part
US20150336617A1 (en) * 2013-09-30 2015-11-26 Hyundai Motor Company Outer panel for pillar of vehicle, and method and rolling apparatus for manufacturing the same
US20170225208A1 (en) * 2016-02-04 2017-08-10 C.R.F. Societa Consortile Per Azioni Method for rolling metal sheets with variable thickness
US10758956B2 (en) * 2016-02-04 2020-09-01 C.R.F. Società Consortile Per Azioni Method for rolling metal sheets with variable thickness

Also Published As

Publication number Publication date
EP2216109B1 (en) 2011-05-25
JP5235919B2 (en) 2013-07-10
EP2216109A1 (en) 2010-08-11
JP2010179368A (en) 2010-08-19
DE102009007926A1 (en) 2010-08-19
ATE510638T1 (en) 2011-06-15

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