EP0988906A2 - Joint de sertissage entre une tôle extérieure et une tôle intérieure - Google Patents

Joint de sertissage entre une tôle extérieure et une tôle intérieure Download PDF

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Publication number
EP0988906A2
EP0988906A2 EP99116335A EP99116335A EP0988906A2 EP 0988906 A2 EP0988906 A2 EP 0988906A2 EP 99116335 A EP99116335 A EP 99116335A EP 99116335 A EP99116335 A EP 99116335A EP 0988906 A2 EP0988906 A2 EP 0988906A2
Authority
EP
European Patent Office
Prior art keywords
section
sheet
bending
outer sheet
unbent
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Withdrawn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
EP99116335A
Other languages
German (de)
English (en)
Other versions
EP0988906A3 (fr
Inventor
Martin Dr. Klamser
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0988906A2 publication Critical patent/EP0988906A2/fr
Publication of EP0988906A3 publication Critical patent/EP0988906A3/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Withdrawn legal-status Critical Current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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
    • B21D39/021—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors

Definitions

  • the present invention relates to a seam connection between an outer panel and an inner panel, especially for motor vehicles.
  • Steel sheets have a much higher elongation at break than, for example Sheets made of aluminum alloys. AlMg0.4Si1.2 skin alloys for motor vehicles e.g. Elongations at break from about 22%. Steel sheets can therefore be compared with aluminum alloy sheets, with much smaller ones Fold outer radius to be folded. Typically achievable Folding outer radii for steel sheets are of the order of magnitude 1.45 times the sheet thickness.
  • a method of making a seam connection between a Outer sheet, which in particular be an aluminum sheet can, and an inner panel of a motor vehicle door is from the DE 44 45 579 C1 known. There will be a later to be folded Edge area of the outer sheet first stretched and onto one reduced wall thickness before the folding process is initiated becomes. This process is considered very complex, because before the actual folding, a very precise tool guide required stretching of the sheet can be carried out got to.
  • the object of the invention is to create a seam connection, with the even when using aluminum alloy sheets or alloys of comparable elongation at break Folding outer radii without the risk of material roughening and Cracks can be achieved.
  • a fold connection is provided, which also when using aluminum alloys or alloys comparable elongation at break making the formation more supple Component edges or folded edges guaranteed without roughening and cracks.
  • the fold connection according to the invention enables Formation of a narrow light edge, i.e. of a little optical Gap, between two with the fold connection according to the invention trained components.
  • By the producible according to the invention smaller bend radius is greater clamping force available for fixing an outer sheet to an inner sheet.
  • the seam connection according to the invention is for example for aluminum sheets without the need for post-treatment producible.
  • the second section of the bending section is expedient designed to be essentially rectilinear.
  • a such design is relatively simple shaped, and therefore tools that can be produced inexpensively.
  • the outer sheet is made of an aluminum alloy, in particular AlMg0.4Si1.2 or another naturally hard aluminum alloy.
  • AlMg0.4Si1.2 aluminum alloy
  • Such Alloys are light in weight and find preferred application in automotive engineering.
  • the inner sheet is expediently a drawn sheet metal part, in particular from a steel, magnesium or aluminum alloy, or as a casting, in particular as a magnesium or aluminum die casting, executed.
  • the outer sheet have a thickness of 1 to 1.5 mm, in particular 1.25 mm, and the inner sheet a thickness of 1.8 mm or larger, in particular of 2 mm or larger.
  • Such sheet thicknesses are widely used in automobile construction, because they are sufficiently mechanical at a relatively low weight Have strength.
  • Folded joint for which protection is sought independently is, the inner sheet in an edge portion, which in essentially lies opposite the bending section of the outer sheet, a smaller thickness than outside this range.
  • the edge section is expediently by means of a Inner sheet trained level limited. Such a stage can be inserted into a sheet in a simple manner.
  • the bending radius advantageously corresponds to the reduction the fold radius about 1.3 to 1.7 times, in particular 1.5 times the thickness of the outer sheet.
  • the method steps are expediently folding the outer sheet and reduction of the folding radius of the outer sheet by means of performed an essentially angular folding tool, whose the section 4b of the bending section 4 of the Outer sheet loading area with respect to the unbent Area of the outer sheet extends at the angle ⁇ .
  • an essentially angular folding tool whose the section 4b of the bending section 4 of the Outer sheet loading area with respect to the unbent Area of the outer sheet extends at the angle ⁇ .
  • 1 to 2d are the successive ones according to the invention Steps to make a seam connection, for example for the door of a motor vehicle shown.
  • the outer sheet 1 can be folded, for example, using a stamp (not shown).
  • the outer bending radius or bending radius r a corresponds approximately to 2.8 to 3.4 times the thickness t of the outer sheet 1. With a sheet thickness t of 1.25 mm, this condition leads to a bending radius of 3.5 to 4.25 mm .
  • This reduction in radius represents a compression load on the bending section 4, in the course of which the radius r a decreases and the inner edge of the bending section 4 bears against the inner sheet 2 (FIG. 2 c). If the deformation continues due to tangential compressive stresses, there is an excess of material in the radius area or bending section 4, which leads to an extension of the bending section 4. At the same time, however, material is also displaced into the bending area 4 and abuts against a lateral stop of the finished folding plate 5. This also induces radial compressive stresses.
  • the finished folding plate 5 has one with respect to the unbent Section of the outer sheet 1 sloping section 5a on.
  • This section 5a acts during the in Fig. 2b to 2d the finished folding process shown the bending area 4 of the outer sheet 1, so that between the end portion 4c and Bending radius section 4a gives a section 4b, which corresponds accordingly the section 5a of the finished folding plate 5 runs obliquely.
  • the overall result is a wedge-shaped geometry of the invention Folded connection, as shown in Fig. 2d is.
  • the finished folding plate 5 with or be formed without a stop shoulder 10 which is shown in Fig. 2a is outlined in dashed lines.
  • the component dimension by Stop shoulder set By means of the stop shoulder 10 are in addition to occurring tangential compressive stresses radial compressive stresses are also introduced into the outer sheet 1, whereby the stress on the outer sheet on the rebate or Bending area reduced. This is an improvement in Surface quality of the folded outer sheet can be achieved.
  • Stop shoulder 10 results in a free shaping of the outer contour of the fold and an increase in the fold length of about 0.2 mm.
  • FIG. 3 shows a further embodiment of an inventive one Folded connection shown with a downsizing of the fold radius compared to conventional fold connections is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP99116335A 1998-09-05 1999-08-19 Joint de sertissage entre une tôle extérieure et une tôle intérieure Withdrawn EP0988906A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19840617A DE19840617B4 (de) 1998-09-05 1998-09-05 Falzverbindung zwischen einem Außenblech und einen Innenblech und Verfahren zur Herstellung einer Falzverbindung
DE19840617 1998-09-05

Publications (2)

Publication Number Publication Date
EP0988906A2 true EP0988906A2 (fr) 2000-03-29
EP0988906A3 EP0988906A3 (fr) 2000-09-20

Family

ID=7879967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99116335A Withdrawn EP0988906A3 (fr) 1998-09-05 1999-08-19 Joint de sertissage entre une tôle extérieure et une tôle intérieure

Country Status (2)

Country Link
EP (1) EP0988906A3 (fr)
DE (1) DE19840617B4 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6810707B2 (en) 2002-05-10 2004-11-02 Ford Motor Company Compressed-radius hem-forming process and tool
CN103624117A (zh) * 2012-08-20 2014-03-12 福特环球技术公司 突然弯曲高强度面板的方法和装置

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257043B1 (en) * 1999-12-30 2001-07-10 Unova Ip Corp. Modified flat hem apparatus and method
DE20116187U1 (de) * 2001-10-02 2003-01-16 KUKA Schweissanlagen GmbH, 86165 Augsburg Falzwerkzeug
EP1666171B1 (fr) * 2003-09-08 2008-11-12 Sumitomo Light Metal Industries, Ltd. Element de plaque en alliage d'aluminium presentant une partie d'ourlet
CZ2011396A3 (cs) * 2011-06-30 2013-01-09 Skoda Auto A. S. Lemovaný spoj
DE102012022332A1 (de) 2012-11-14 2013-05-16 Daimler Ag Verfahren und Vorrichtung zur Detektion von Materialversagen an Falzkanten
DE102014213063A1 (de) 2014-07-04 2016-01-07 Volkswagen Aktiengesellschaft Verfahren und Werkzeugvorrichtung zum Herstellen einer Falzverbindung
DE102014213008A1 (de) 2014-07-04 2016-01-07 Volkswagen Aktiengesellschaft Falzverbindung mit kleinem Falzradius, Bauteilverbund mit einer solchen Falzverbindung und Verfahren zur Herstellung
CN105328035A (zh) * 2015-11-17 2016-02-17 江苏强盛汽配制造有限公司 一种发动机隔热罩包边模具及包边工艺
CN107931456B (zh) * 2017-11-24 2023-10-20 安徽鲲鹏装备模具制造有限公司 一种冷柜内胆双侧边角线分步铆接机构
CN107931457B (zh) * 2017-11-24 2023-10-17 安徽鲲鹏装备模具制造有限公司 一种冷柜内胆侧边端边同步铆设备
CN107900236B (zh) * 2017-11-24 2023-10-20 安徽鲲鹏装备模具制造有限公司 一种冷柜内胆的底板四圆角铆接设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49113079U (fr) * 1973-01-31 1974-09-26
DE4116834A1 (de) * 1991-05-23 1992-11-26 Bayerische Motoren Werke Ag Schwenkbares karosserieteil, insbesondere kraftfahrzeugtuer
JPH0790299B2 (ja) * 1991-08-01 1995-10-04 トライエンジニアリング株式会社 ローラー式ヘミング加工方法
DE4445579C1 (de) * 1994-12-20 1996-02-22 Daimler Benz Ag Verfahren zum Herstellen einer Falzverbindung
DE19620196A1 (de) * 1996-05-20 1997-11-27 Audi Ag Verfahren zum Umformen eines flächigen Metallwerkstückes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6810707B2 (en) 2002-05-10 2004-11-02 Ford Motor Company Compressed-radius hem-forming process and tool
CN103624117A (zh) * 2012-08-20 2014-03-12 福特环球技术公司 突然弯曲高强度面板的方法和装置
CN103624117B (zh) * 2012-08-20 2016-08-10 福特环球技术公司 突然弯曲高强度面板的方法和装置

Also Published As

Publication number Publication date
EP0988906A3 (fr) 2000-09-20
DE19840617A1 (de) 2000-03-09
DE19840617B4 (de) 2006-08-31

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