EP1718425A1 - Presse hybride pour le formage de pieces de fortes dimensions - Google Patents
Presse hybride pour le formage de pieces de fortes dimensionsInfo
- Publication number
- EP1718425A1 EP1718425A1 EP05726416A EP05726416A EP1718425A1 EP 1718425 A1 EP1718425 A1 EP 1718425A1 EP 05726416 A EP05726416 A EP 05726416A EP 05726416 A EP05726416 A EP 05726416A EP 1718425 A1 EP1718425 A1 EP 1718425A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser
- press
- dies
- impacts
- localized
- 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.)
- Granted
Links
- 238000007493 shaping process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 8
- 230000035939 shock Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000011089 mechanical engineering Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/06—Swaging presses; Upsetting presses
- B21J9/08—Swaging presses; Upsetting presses equipped with devices for heating the work-piece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
Definitions
- the invention relates to the forming or forging of large parts, in particular very thick. More particularly, it relates to a press for forming very thick pieces comprising a frame supporting two dies and actuation means for clamping the piece to be formed between these two dies so that they conform to their shape. It also relates to a process for forming a part of large dimensions, in particular of large thickness, by means of such a press.
- a currently known technique for shaping a part consists of inserting it between two matrices and then deforming it so that the part follows the shape of this matrix to obtain a desired geometry. This proven technique has the effect of generating stresses in the part, or even micro-cracks, which can cause accelerated aging.
- Another currently known technique consists in sending shocks generated by a laser to the surface of the room. Very short pulses of strong energy strike the surface of the room. The laser energy is absorbed by the material over a very small thickness. The affected area is then transformed into a plasma whose expansion generates a shock wave in the material. This wave can be used to harden the surface of the material or to deform it if the energy is sufficient.
- the brevity of the pulse means that there is no heat transfer.
- the invention relates to a press and a method which overcomes the drawbacks of the prior art. This result is achieved by the fact that the frame supports at least one pulse laser to generate localized high energy impacts on the surface of the part.
- the forming process is characterized by the following stages: - the part to be formed is inserted between the two dies; - The two dies are brought closer to one another so that the part follows the shapes of the dies; - the surface of the part is shaped by localized high-energy laser impacts.
- press forming allows the desired shape to be approached very quickly, while the laser allows it to be finished very precisely.
- the laser operates in impulse shock regime without thermal transfer, therefore without adding residual stresses.
- the impulse shocks alone allow to modify the shape of the part according to a pre-established and repeatable geometry.
- the press and the laser can be used consecutively or, preferably, simultaneously.
- the press must have at least one passage formed in one of the dies to allow the passage of high energy pulses from the laser through the die.
- the simultaneous use of the laser and the press makes it possible to use a press of reduced size, with equal capacity or, even, with equal size, increases the capacities of the press without having to move the part.
- the tools used can be simplified.
- the dies can be replaced by simple shaping tools placed at the end of jacks which press on the part to be shaped.
- FIG. 1 illustrates a conventional press forming process
- - Figure 2 illustrates a laser forming process according to one prior art
- - Figure 3 illustrates a hybrid press according to the invention.
- a very thick workpiece 2 is placed between a lower die 4 and an upper die 6.
- the dies 4 and 6 are brought closer to each other by actuation means such as jacks hydraulic diagrammed by the arrows 8.
- the part 2 is deformed so as to follow the shape of the dies 4 and 6.
- this technique has the effect of generating stresses in the part, which can be translate by the appearance of micro-cracks.
- a part to be formed designated in its initial state by the reference 2a, comprises an upper surface 10 and a lower surface 12 (according to FIG. 2) whose surface 10 receives impacts, shown diagrammatically by the arrows 14, emitted by a laser 16.
- These pulses are localized, very brief and of high energy. Typically their duration is a few tens of nanoseconds, and their energy of some GW / cm2.
- the energy of the laser 16 is absorbed by the material over a very small thickness. The area involved is transformed into a plasma, the trigger of which generates a shock wave in the material.
- This wave can be used to harden the surface of the material or to deform it if the energy is sufficient.
- the brevity of the pulse means that there is no heat transfer.
- the part in its final state has been designated by the reference "index b”.
- the surface 10, directed towards the laser beam 14, has a concave shape while the surface 12, located opposite the laser beam has a convex shape.
- complex shapes can also be obtained.
- This laser forming process is described, in particular, in the articles "Convex laser forming ith high certainty” (Wenchuan I and Y. Lawrence Yao, Department of Mechanical Engineering, Columbia University, New-York, NY 10 027) and "Optimal and robust design of laser forming process "(Chao Liu and Y.
- the technique of the invention shown in Figure 3 uses both the class ⁇ pressing process described in reference to Figure 1 and the laser forming process described in reference to Figure 2. For this purpose, it comprises a frame 3, a lower matrix 4 and an upper matrix 6 and a laser 16 emitting a beam 14 mounted on the frame 3.
- the laser 16 can be of the solid type (based on Neodymium, Yttrium, Itherbium, etc.) or dyes with a frequency of the order of 1Khz. Both techniques can be used consecutively. In this case, the mechanical deformation forming method is used first to quickly obtain a rough shape of the part. Then the finishing to obtain precise dimensions is carried out by the laser forming process. This second means is used to obtain an extremely precise shape. It does not induce heat transfer in the room. In a preferred variant of the process, the two techniques are used simultaneously. In this case, at least one of the dies 4 and 6 has a passage opening 18 for the laser beam 14. This passage has been symbolized in FIG. 3 by an opening 18 in the upper matrix 4.
- the passage of the laser beam can be obtained by any process, for example by optical fibers or by miro ⁇ zrs making it possible to direct the pulses towards precisely selected zones of the part to be formed 2.
- the part 2 can be heated so as to reduce the stresses induced by the shaping. The part thus formed can then gain in service life. This heating can be induced by conventional means or by laser if a very localized heating is desired.
- the laser which works in thermal regime, designated by the reference 20, is not the same as that which generates the shocks. The characteristics of these lasers are different.
- the combination of the two techniques makes it possible, thanks to the laser 16, to reduce the capacity of the press to use.
- the tools used can be simplified.
- the dies 4 and 6 can be replaced by simple shaping tools placed at the end of jacks which come to press on the part 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0450242A FR2865949B1 (fr) | 2004-02-11 | 2004-02-11 | Presse hybride pour le formage de pieces de fortes dimensions |
| PCT/FR2005/050079 WO2005077567A1 (fr) | 2004-02-11 | 2005-02-09 | Presse hybride pour le formage de pieces de fortes dimensions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1718425A1 true EP1718425A1 (fr) | 2006-11-08 |
| EP1718425B1 EP1718425B1 (fr) | 2007-12-12 |
Family
ID=34778718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05726416A Expired - Lifetime EP1718425B1 (fr) | 2004-02-11 | 2005-02-09 | Presse hybride pour le formage de pieces de fortes dimensions |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1718425B1 (fr) |
| DE (1) | DE602005003794T2 (fr) |
| FR (1) | FR2865949B1 (fr) |
| WO (1) | WO2005077567A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2332631B1 (es) * | 2008-02-07 | 2011-01-31 | Mondragon Goi Eskola Politeknikoa Jose Maria Arizmendiarrieta, S.Coop | Aparato para conformado asistido por laser. |
| DE102010042778B4 (de) * | 2010-10-21 | 2012-06-21 | Schuler Automation Gmbh & Co. Kg | Vorrichtung und Verfahren zur Herstellung eines Durchbrüche aufweisenden Blechformteils sowie Laserschneidanordnung |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3604710C2 (de) * | 1985-02-15 | 1986-11-27 | Bündgens Maschinen Verwaltungen GmbH, 5100 Aachen | Verwendung einer Erwärmungseinrichtung mittels Laserstrahlen |
| GB8809666D0 (en) * | 1988-04-23 | 1988-05-25 | Amchem Co Ltd | Machining method & apparatus |
| DE19514285C1 (de) * | 1995-04-24 | 1996-06-20 | Fraunhofer Ges Forschung | Vorrichtung zum Umformen von Werkstücken mit Laserdiodenstrahlung |
| AT407615B (de) * | 1997-07-02 | 2001-05-25 | Inst Spanlose Fertigung Und Ho | Verfahren zum biegen mit laserunterstützung |
| EP1046440A1 (fr) * | 1999-04-16 | 2000-10-25 | SM Schweizerische Munitionsunternehmung AG | Procédé de forgeage de pièces métalliques à symétrie axiale |
| CA2371199A1 (fr) * | 1999-04-23 | 2000-11-02 | Carsten Dusterhoft | Procede automatise et dispositif pour former un corps sans enlevement de copeaux |
| AT410908B (de) * | 2001-12-21 | 2003-08-25 | Inst Spanlose Fertigung Und Ho | Laserunterstütztes innenhochdruckumformen |
-
2004
- 2004-02-11 FR FR0450242A patent/FR2865949B1/fr not_active Expired - Fee Related
-
2005
- 2005-02-09 EP EP05726416A patent/EP1718425B1/fr not_active Expired - Lifetime
- 2005-02-09 DE DE602005003794T patent/DE602005003794T2/de not_active Expired - Lifetime
- 2005-02-09 WO PCT/FR2005/050079 patent/WO2005077567A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005077567A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005077567A1 (fr) | 2005-08-25 |
| EP1718425B1 (fr) | 2007-12-12 |
| FR2865949B1 (fr) | 2006-05-19 |
| FR2865949A1 (fr) | 2005-08-12 |
| DE602005003794T2 (de) | 2008-12-24 |
| DE602005003794D1 (de) | 2008-01-24 |
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