EP2931451A1 - Freies biegeverfahren und verwendung eines stempels zum abkanten eines blechs - Google Patents
Freies biegeverfahren und verwendung eines stempels zum abkanten eines blechsInfo
- Publication number
- EP2931451A1 EP2931451A1 EP13820727.9A EP13820727A EP2931451A1 EP 2931451 A1 EP2931451 A1 EP 2931451A1 EP 13820727 A EP13820727 A EP 13820727A EP 2931451 A1 EP2931451 A1 EP 2931451A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- bending
- sheet
- free
- stamp
- 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- Withdrawn
Links
- 238000005452 bending Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000002184 metal Substances 0.000 title abstract description 15
- 229910052751 metal Inorganic materials 0.000 title abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 description 3
- 241000282465 Canis Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
-
- 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
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
- B21D5/0209—Tools therefor
Definitions
- the invention relates to a free bending method for folding a sheet, in particular steel sheet, with a yield strength> 500 MPa, in which the bearing on two supports sheet is loaded via a, having a stamp base punch with a bending moment.
- Free bending methods are known from the prior art, with which a sheet is bent over a tapered or rounded punch and waiving a die or a counter-holder. Although a free bending process can be carried out with such a comparatively inexpensive bending tool, undesirable bending results often occur without a die or anvil, as evidenced inter alia by higher-strength, high-strength and ultra high-strength sheets (steel sheets or light metal sheets) in a roof-shaped course of the bending zone ,
- the object of the invention is to improve a free bending process such that even sheets with a yield strength> 500 MPa can be folded inexpensively and without roofing.
- the invention solves the stated problem with respect to the method in that the sheet is stretched during bending by the punch bottom of the punch with an at least partially constant bending moment to avoid roofing on the folded sheet.
- the free bending method according to the invention can also lead to a more uniform curvature in the region of the bending point, whereby a possible formation of external cracks or internal crushing folds can also be avoided.
- the thus folded sheet metal can therefore leave the process with a uniformly increased in the bending area mechanical strength.
- waiving a counter-holder and / or a die for the inventive method a comparatively inexpensive bending tool sufficient.
- higher-strength, high-strength and ultra-high-strength metal sheets can be understood as those sheets which have been high-alloyed, tempered and / or thermomechanically treated.
- sheets with a minimum yield strength Re over 500 MPa, preferably over 700 MPa are conceivable.
- roofing occurs at certain geometric ratios of the stamps or edging tools. This means that canine radii can be smaller than the punch or tool radii. The roofing results from high local strains below the punch or tool apex.
- stamps are inexpensive to manufacture or to wait, which can facilitate the handling of the process.
- the sheet As an alternative to a flat stamp base, it is also conceivable for the sheet to be stretched over a punch bottom which has a recess.
- the free bending process can be adapted handling-friendly with respect to the requirements of the bending radius, when the punch holder of the punch a replaceable bending head or Druckfinne is attached, which forms the bottom of the stamp.
- the inventive method allows a variety of bending inserts handling easy to replace according to the different sheet thicknesses.
- a free bending process can be improved by using a die with a die base designed to generate a line load that has at least a constant bending moment, to cut a sheet with a yield strength> 500 MPa, because this can prevent roofing on the bent sheet metal.
- a high-strength Th steel which has a high minimum yield strength, can prove such a punch to even out the deformations occurring in the main deformation zone on the plate and thus to avoid roofing in the sheet metal course.
- Simple construction conditions on the stamp can result if the stamp base is at least partially flat.
- the stamp base can have a recess in order to reduce the contact area between the stamp and the sheet at the beginning of free bending.
- the edge radius can be set with a constant bending moment corresponding to the stamp geometry.
- the stamp according to the invention can be used in a variety of ways when the stamp has a punch holder and a bending head replaceably mounted on the stamp holder, which forms the stamp base.
- FIG. 1 is a sectional view of a provided with a sheet to be formed sheet bending tool according to the invention
- Fig. 2 is a sectional view of a beveled according to the prior art
- Fig. 3 is a sectional view of a beveled sheet according to the invention and Fig. 4 shows an alternative embodiment of the stamp shown in FIG. 1. Way to carry out the invention
- a bending tool 1 is shown according to a first embodiment, with which a sheet 2 is formed and that after a free bending process.
- the bending tool 1 comprises two supports 3, 4, on which the sheet metal 2 loads, and a provided between the supports 3 and 4 punch 5, whose die bottom 6 mechanically loads the sheet 2 to bending.
- the stamp base 6 is made flat, as can be seen from FIG.
- the bending radii known from the prior art in high-strength steel sheets with roof-shaped profile 7 are to be avoided, as shown in FIG. 2.
- FIG. 3 shows that such bending radii with a roof-shaped profile 7 can be avoided according to the invention due to increased material stress.
- a uniform curvature results. Contrary to the known from the prior art free bending process - with a result according to Fig. 2 - the sheet 2 is stretched in the free bending process according to the invention from the beginning and during its plasticization with a constant bending moment, at least over the distance 9 of the sheet. 2
- the stamp flanks 10, 11 of the stamp 5 each run over the stamped base 6 via a curved cross-sectional contour 12. As a result, surface damage and premature wear of the punch are improved avoided.
- the sword-shaped punch 5 has a punch holder 13 and a bending head 14.
- the plugged onto the punch holder 13 bending head 14 can be replaced and also forms the stamp base 6 from.
- the punch 15 shown in FIG. 4 has a punch bottom 6 with a recess 16 in the form of a recessed bottom region.
- the stamp base 6 can not only be formed by a bending head 14 or a pressure fin, but also by two bending heads 14 or pressure fins, in order thereby to apply the 4-point bend of the stretch-stressed sheet 2 to two supports 3, 4 train.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT505962012A AT513266B1 (de) | 2012-12-17 | 2012-12-17 | Freies Biegeverfahren zum Abkanten eines Blechs |
| PCT/AT2013/050256 WO2014094025A1 (de) | 2012-12-17 | 2013-12-17 | Freies biegeverfahren und verwendung eines stempels zum abkanten eines blechs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2931451A1 true EP2931451A1 (de) | 2015-10-21 |
Family
ID=49955114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13820727.9A Withdrawn EP2931451A1 (de) | 2012-12-17 | 2013-12-17 | Freies biegeverfahren und verwendung eines stempels zum abkanten eines blechs |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2931451A1 (de) |
| AT (1) | AT513266B1 (de) |
| WO (1) | WO2014094025A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047400A (zh) * | 2018-09-13 | 2018-12-21 | 上海胜迪实业有限公司 | 内嵌式金属加热器成型装置 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2893459A (en) * | 1954-10-21 | 1959-07-07 | Lockheed Aircraft Corp | Power brake having work supporting platen with heating means for work |
| DE3017758C2 (de) * | 1980-05-09 | 1984-12-06 | G. Siempelkamp Gmbh & Co, 4150 Krefeld | Vorrichtung zum approximativen Rundbiegen eines Blechzuschnittes |
| DE3544056A1 (de) * | 1985-12-13 | 1987-06-25 | Helmut Dischler | Biegemaschine |
| JP2747224B2 (ja) * | 1994-06-30 | 1998-05-06 | 株式会社アマダメトレックス | プレスブレーキの上型ホルダ |
| DE4310773C2 (de) * | 1993-04-02 | 2002-10-17 | Martin Reigl | Vorrichtung zum freien plastischen Biegen eines Werkstücks |
| JP2859548B2 (ja) * | 1994-12-28 | 1999-02-17 | 日本鋼管株式会社 | 鋼板の成形方法 |
| BE1012228A3 (nl) * | 1998-10-13 | 2000-07-04 | Haco Nv | Werkwijze voor het adaptief plooien van platen en inrichting die zulke werkwijze toepast. |
| WO2012092909A1 (de) * | 2011-01-07 | 2012-07-12 | Technische Universität Dortmund | Verfahren zum inkrementellen umformen von blechstrukturen, insbesondere zum umformen von rohren oder dgl. |
-
2012
- 2012-12-17 AT AT505962012A patent/AT513266B1/de active
-
2013
- 2013-12-17 EP EP13820727.9A patent/EP2931451A1/de not_active Withdrawn
- 2013-12-17 WO PCT/AT2013/050256 patent/WO2014094025A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2014094025A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AT513266A4 (de) | 2014-03-15 |
| AT513266B1 (de) | 2014-03-15 |
| WO2014094025A1 (de) | 2014-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3656480B1 (de) | U-o-formen eines um drei raumachsen gekrümmten bauteils | |
| WO2013104650A1 (de) | Vorrichtung und verfahren zum tiefziehen von schalenteilen mit integriertem kopf- und zargenbeschnitt | |
| DE102016118419A1 (de) | Verfahren und Vorrichtung zum Herstellen von Bauteilen mit angepasstem Bodenbereich | |
| DE2461538A1 (de) | Verfahren zum genauen biegen von metallmaterial und vorrichtung zum durchfuehren des verfahrens | |
| DE102011121904B4 (de) | Verfahren zur scherenden Bearbeitung von Blechen mit einer anschließenden Umformung sowie ein hierzu bestimmtes Schneidwerkzeug | |
| DE102017106999A1 (de) | Verfahren zur Herstellung eines durch U-O-Formen hergestellten Blechumformbauteils sowie Blechumformbauteil | |
| DE112018007878T5 (de) | Streckbördelwerkzeug, Streckbördelverfahren unter Verwendung desselben und Bauteil mit Streckflansch | |
| AT513266B1 (de) | Freies Biegeverfahren zum Abkanten eines Blechs | |
| DE102018115382B4 (de) | Verbinden von Blechendabschnitten mittels Umformen | |
| EP2492028B1 (de) | Verfahren zum Aufbringen einer Rosette auf ein Rohr | |
| DE3229246A1 (de) | Verfahren und vorrichtung zum abstreifen eines randflansches waehrend des behaelternachziehens | |
| EP3253509B1 (de) | Verfahren und vorrichtung zum auskragen eines werkstücks | |
| WO2016119940A1 (de) | Verfahren und vorrichtung zur herstellung eines kragens an einem werkstück | |
| EP3519120B1 (de) | Verfahren zur herstellung eines geformten bauteils mit einem masshaltigen zargenbereich | |
| EP3928919B1 (de) | Spannvorrichtung für längsnahtverschweisste rohrschüsse | |
| DE3037590A1 (de) | Verfahren und vorrichtung zum biegen von gewellten oder profilierten blechen | |
| DE102020135048B4 (de) | Verfahren zum Herstellen eines Rohrs | |
| DE102014116192B4 (de) | Rohrbiegepresse | |
| EP1623782B1 (de) | Verfahren und Vorrichtung zum Umformen und Schneiden von hochfesten Blechen | |
| DE102018112056B4 (de) | Verfahren und Vorrichtung zum Schneiden eines Werkstücks | |
| DE102023101472B4 (de) | Verfahren zur Speichenverstärkung und eine Speichenverstärkungsstruktur | |
| DE102007049866B4 (de) | Verfahren, Werkstück und Vorrichtung zum formschlüssigen Einspannen und Fixieren von Werkstücken mittels Sperrsicke | |
| DE962156C (de) | Verfahren zum mehrstufigen Laengswalzen von Profilen, z. B. von Turbinenschaufeln | |
| DE102019130419A1 (de) | Leiterrahmen mit strukturell optimierten Löchern | |
| DE102020003671A1 (de) | Verfahren zur Herstellung eines Bauteilsystems und Bauteilsystem |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20150717 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20161121 |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: B21D 5/02 20060101ALI20181031BHEP Ipc: B21D 5/01 20060101AFI20181031BHEP |
|
| INTG | Intention to grant announced |
Effective date: 20181126 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20190409 |