EP1311358A1 - Dispositif pour le formage d'une zone d'extremite d'une piece a usiner - Google Patents

Dispositif pour le formage d'une zone d'extremite d'une piece a usiner

Info

Publication number
EP1311358A1
EP1311358A1 EP01971612A EP01971612A EP1311358A1 EP 1311358 A1 EP1311358 A1 EP 1311358A1 EP 01971612 A EP01971612 A EP 01971612A EP 01971612 A EP01971612 A EP 01971612A EP 1311358 A1 EP1311358 A1 EP 1311358A1
Authority
EP
European Patent Office
Prior art keywords
transmission element
workpiece
force transmission
pressure chamber
pressure
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
Application number
EP01971612A
Other languages
German (de)
English (en)
Other versions
EP1311358B1 (fr
Inventor
Dieter Ehrke
Udo Hunkenschroeder
Frank-Stefan Runte
Martin Ziehl
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.)
Parker Hannifin GmbH and Co KG
Original Assignee
Parker Hannifin GmbH and Co KG
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
Priority claimed from DE2000140596 external-priority patent/DE10040596C1/de
Priority claimed from DE2000140595 external-priority patent/DE10040595C2/de
Application filed by Parker Hannifin GmbH and Co KG filed Critical Parker Hannifin GmbH and Co KG
Publication of EP1311358A1 publication Critical patent/EP1311358A1/fr
Application granted granted Critical
Publication of EP1311358B1 publication Critical patent/EP1311358B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • 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

Definitions

  • the invention relates to a device for forming an end region of a workpiece, in particular for cold press forming a pipe end region. It is known to clamp the workpiece using a first hydrodynamically actuatable force transmission element and to reshape the end region by the direct or indirect action of a second hydrodynamically actuated force transmission element.
  • a hydrodynamically actuated force transmission element is understood to mean a body which can be actuated hydraulically and / or pneumatically. With the mostly high forces that are required for forming a workpiece, hydraulic actuation is expediently selected.
  • DE 195 11 447 AI discloses a device suitable for forming a pipe end region.
  • This device has a receptacle for interchangeable jaws for clamping the tube.
  • the clamping jaws are pressurized by a first hydraulically actuated piston in order to clamp the pipe.
  • the first piston has a central one Through opening in which a piston rod of a second hydraulically actuated piston is guided.
  • the two pistons are thus arranged one behind the other in the same housing and are guided coaxially to one another.
  • the piston rod of the second piston which is provided with a shaping tool, can act on the pipe end region through the central, continuous opening in the first piston by compressing the pipe end region in the axial direction.
  • the end area deforms in accordance with the shape of the U-shaped tool and the clamping jaws.
  • the known device has a three-part housing.
  • a first housing part has a first bore in which the first annular piston is guided with its jacket and has a second bore in which the second piston is guided with its piston rod.
  • the second hole has a smaller diameter than the first hole.
  • a stop is formed for the jacket of the first, annular piston, which defines the maximum retracted position of the first piston.
  • a hydraulic fluid for actuating the first piston can be introduced between the stop and the piston skirt.
  • Another part of the three-part housing is a housing end piece that can be screwed to the first part and has a cylindrical bore for guiding the end piece of the second piston. The first housing part forms a stop in the direction of actuation of the second piston.
  • a hydraulic medium can in turn be introduced between the stop and the second piston in order to retrieve the second piston after the tube has been formed.
  • the corresponding hydraulic chamber for receiving the hydraulic fluid is against the first Sealed hydraulic space between the jacket of the first piston and its rear stop.
  • the third part of the three-part housing forms the receptacle for the clamping jaws and for the front parts of the first and second pistons or for the U-shaped tool.
  • the forming tool is designed and connected to the front end region of the piston rod of the second piston so that when the second piston is retrieved, the first piston is carried along and the clamping jaws are relieved of pressure.
  • the central through opening of the first piston has a rear stop.
  • the forming process to be carried out with the device known from DE 195 11 447 AI is disadvantageous insofar as both controlling the process sequence at the beginning and end of the forming process and checking the tool and the pipe to be formed before starting the forming process are neither provided nor due to the Coupling of the two pistons are possible during their return movement.
  • the invention is therefore based on the object of providing a device for shaping a workpiece end region which enables better control of the shaping process.
  • the invention provides in a first embodiment that between the first power transmission element and the second
  • Power transmission element is arranged a first pressure chamber connected to a first pressure connection, and that the second power transmission element is connected to a second Pressure connection connected second pressure space is assigned such that the introduction of a pressure medium acts on the second force transmission element in the clamping and forming direction.
  • the pressure of the pressure medium enclosed in the first pressure chamber is maintained by blocking the first pressure connection, the pressure medium being released from the first pressure chamber when a preset excess pressure is reached, so that when the first force transmission element is in the clamping position the second force transmission element for reshaping the workpiece is displaceable relative to the first force transmission element and, after reshaping the end region of the workpiece by re-introducing pressure medium into the first pressure space, the second force transmission element and then the first force transmission element are moved back to their starting positions by means of a separate drive.
  • the clamping pressure is maintained at the required level.
  • the required pressure therefore only has to be present for as long as it is needed.
  • the second force transmission element can also be actively returned to its starting position.
  • a third pressure chamber with a connection to a third pressure connection is provided as the drive for the return movement of the first force transmission element.
  • the drive for the return movement of the first force transmission element can also be designed as a return spring.
  • the starting position of the first force transmission element is defined by a stop formed between the housing and the first force transmission element.
  • sensors are provided in order to recognize the inserted tool and to check the respective position of the first force transmission element as to whether it has returned to its basic position.
  • sensors before starting the clamping and / or forming process, it can be automatically determined whether a suitable clamping and / or forming tool is present and / or correctly positioned, the presence and / or the correct position of the tool being indicated by a non-contact distance measurement can be determined by means of a sensor.
  • the basic position of the forming tool and the can be detected by this path taken during the forming process.
  • the relative displacement path required for the forming process between the first force transmission element and the second force transmission element i.e. the so-called compression length L
  • the first force transmission element by introducing pressure medium into the first pressure chamber can be moved away from the stationary second force transmission element, after which the tensioning and forming process follows as described, by introducing pressure medium into the second pressure chamber.
  • a pressure medium can be introduced into the first pressure chamber both for actuating the first force transmission element and for releasing the second force transmission element, which is associated with the advantage of an even better control option for the forming process.
  • the length of the first pressure space between the first actuating surface and the second actuating surface can be adjusted before the workpiece is deformed in order to specify the desired defined working path.
  • the two force transmission elements can then be moved at a constant relative position to one another until the workpiece is clamped. Then again is the second
  • Power transmission element can be moved exactly by the preset length of the pressure chamber against the first power transmission element, so that the clamped workpiece is compressed by a distance corresponding to this length.
  • the first actuating surface and the second actuating surface of the first pressure chamber ends the forming process.
  • the length of the pressure chamber can be measured directly or indirectly in order to set the length.
  • the length can be measured indirectly by means of a distance sensor which is directed onto a surface whose distance from the distance sensor changes depending on the length of the pressure space.
  • a surface is, for example, a conically widening outer surface of the first force transmission element. It is advantageous if a non-contact measuring distance sensor is used.
  • a contactless measuring sensor which outputs a signal depending on whether the workpiece to be formed is in a starting position in which the clamping and / or forming can be started.
  • the sensor is in particular a distance sensor that eats the distance to the closest object in one measuring direction.
  • Such sensors for example using laser radiation, are known from the prior art.
  • the workpiece only needs to be brought into the start position to generate the signal.
  • a control is provided for controlling the clamping and / or forming process, which is connected to the sensor via a signal connection. In response to the signal, clamping and / or forming can then, in particular automatically, begin.
  • a dimension of the workpiece to be formed is measured, or a Measured value measured, which is a clear measure of the dimension of the workpiece to be formed. If, for example, a pipe is formed, it makes sense to measure the pipe diameter. Before starting the clamping and / or the shaping, this allows a check to be made as to whether a workpiece with the desired dimensions is ready for shaping. If the correct workpiece is not brought into a starting position or if no workpiece is brought into the starting position at all, the start signal is not generated either. An unintentional actuation of the forming device or the machining of a workpiece with incorrect dimensions can thus be avoided.
  • a major advantage of this is that safety regulations for the protection of operating personnel can be adhered to in a simple manner and at the same time damage to the device, for example due to workpieces that are too large, can be prevented.
  • a contactless measuring sensor is provided which, depending on whether a suitable clamping and / or forming tool is present and / or correctly positioned, outputs a signal.
  • a contactless measuring sensor is provided which, depending on whether a suitable clamping and / or forming tool is present and / or correctly positioned, outputs a signal.
  • the same sensor can be used to measure the starting position and to measure the presence and / or the positioning of the tool.
  • the presence and / or the correct position of the tool is preferably first measured or determined.
  • a controller can also be provided which receives a signal from the sensor and, after the forming has progressed sufficiently far, ends the forming process.
  • Fig.l A longitudinal section through a
  • FIG. 2 shows the forming device according to FIG. 1 with the workpiece inserted in the starting position
  • FIG. 10 shows the shaping device according to FIG. 9 after completion of the shaping process.
  • Figure 1 shows a longitudinal section through a forming device 1.
  • the forming device 1 has a base housing 3 with a central cylindrical bore, so that a cylindrical surface 4 is formed.
  • a receiving housing 5 for receiving clamping jaws 31 is arranged as a clamping tool.
  • the cylinder surface 4 is designed as a guide surface for guiding the movement of a first force transmission element designed as an outer annular piston 7 and for guiding the movement of a second force transmission element designed as an inner piston 9.
  • the inner piston 9 almost completely fills the cross section of the cylinder bore at the closed end of the cylinder bore.
  • a piston rod 11 of the inner piston 9 extends in the direction of the open end of the cylinder bore.
  • the piston rod 11 is received in a central, cylindrical bore of the outer piston 7 and is fixedly coupled to an extension piece 11a connected to a compression tool 13.
  • the outer piston 7 thus forms a guide for the movement of the piston rod 11 and a compression tool 13 which acts as a forming tool and which is connected to the piston rod 11 or its extension piece 11a via a rotary lock 15.
  • the rotary lock 15 can be actuated like a bayonet lock.
  • a locking projection 16 of the upsetting tool 13 is inserted by a linear movement in the axial direction of the extension piece 11a of the piston rod 11 into the corresponding recess in the extension piece 11a and then rotated about the longitudinal axis of the piston rod 11 in order to lock the connection.
  • the base housing 3 has a first pressure connection 25, through which a hydraulic medium can be introduced into the interior of the base housing 3 or can be derived therefrom.
  • the first pressure connection 25 opens into a first pressure chamber 26 which, in addition to the cylinder surface 4, is also delimited by a first actuating surface 10 of the outer piston 7 and by a second actuating surface 12 of the inner piston 9.
  • the first pressure chamber 26 is larger or smaller and can be in different positions relative to the first pressure connection 25 (see FIGS. 1 to 5). In every operating state, however, the first pressure connection 25 opens into the first pressure chamber 26.
  • the first pressure chamber 26 widens outward in the radial direction, since the first actuating surface 10 and the second actuating surface 12 are partially designed as conical section surfaces. It can be seen from FIG. 3 and FIG. 4 that the first actuating surface 10 and the second actuating surface 12 each have a further region which is designed in the form of a ring and represents a stop for the other pistons 7, 9.
  • a second pressure chamber 28 is also provided in the base housing 3, which is connected via a second pressure connection 27.
  • the second pressure chamber 28 has a volume that can be changed to almost zero.
  • a third pressure chamber 51 which is connected to a third pressure connection 50, is formed in the clamping and forming device in front of the outer piston 7 between the latter and a housing insert 52.
  • This third pressure chamber 51 serves as a drive for the return movement of the outer piston 7 in its starting position.
  • the receiving housing 5 forms a receiving space for clamping jaws 31, which can be actuated by actuating the pistons 7, 9, that is to say by moving them in the axial direction, for clamping a workpiece.
  • the jaws 31 are designed and actuated, for example, like the jaws described in DE 195 11 447 AI.
  • the clamping jaws 31 have a forming recess 33 at their front end on the right in FIG. 1 to FIG. 5, which forms a closed, groove-like recess when a workpiece with the corresponding dimensions is clamped.
  • the Forming recess 33 is used for forming the workpiece, as will be explained in more detail.
  • the shaping can also be determined by the shape of an alternative upsetting tool which is provided instead of the upsetting tool 13 shown and which can be connected to the piston rod 11.
  • the upsetting tool 13 has a measuring collar 8 at its free end, on which the upsetting tool 13 has a smaller outside diameter than in the axial direction behind it.
  • the inner piston 9 has a cone-like section in the region of its free end of its piston rod 11 facing the clamping jaws 31 or of its extension piece 11a, with a cone surface 6 which forms the outer circumference of the extension piece 11a.
  • two bores running in the radial direction and directed towards the central longitudinal axis of the shaping device 1 are provided in the overall housing formed by the base housing 3 and the receiving housing 5, two bores running in the radial direction and directed towards the central longitudinal axis of the shaping device 1 are provided.
  • a sensor S1 or S2 is arranged in each of these bores.
  • the sensor S1 is used to identify the upsetting tool 13, in that the sensor S1 is directed at the measuring collar 8 of the upsetting tool 13 and can identify the used upsetting tool 13 via the distance between the sensor S1 and the measuring collar 8.
  • the sensor S2 serves to determine the basic position of the inner piston 9 in that the sensor S2 is directed towards the conical surface 6 of the part 11a connected to the inner piston 9, so that the position of the conical surface 6 or the process of the extension 11a can be determined With the cylindrical circumferential surface relative to the sensor S2 detects the progress of the movement of the inner piston 8.
  • a workpiece in particular the end of a tube 2 is first introduced into the forming device until the tube end abuts the upsetting tool 13 on the inside, this starting position of the forming device being shown in FIG. 2.
  • the pressure chamber 28 is acted upon by a pressure medium, which leads to a displacement of the inner piston 9 in the illustration of Figure 3 to the left.
  • the second pressure connection 27 of the second pressure chamber 28 is relieved, and pressure medium is introduced into the first pressure chamber 26 via the first pressure connection 25; as a result, the inner piston 9 is moved to the right into its starting position, as can be seen in FIG. 5. Subsequently, pressure medium is introduced into the third pressure chamber 51 via the third pressure connection 50 and the outer piston 7 is thus also moved to the right into its starting position, as is shown in FIG. 1 or FIG. 2.
  • the end position of the outer piston 7 is predetermined by a stop (not shown) between the outer piston 7 and the housing.
  • the function is realized that the working path required for the forming work, the compression length L, can be variably adjusted in a first functional step. Otherwise, the same parts are denoted by the same reference numerals, even if there are slight design differences between the exemplary embodiments in individual positions.
  • the compression spring presses the compression tool 13 into a position in which there is a gap between the cutting tool 13 and an end face 14 of the piston rod 11. Accordingly, there is also a gap between the upsetting tool 13 and the piston rod 11 in the area of the rotary lock 15, which allows the upsetting tool 13 to be moved against the piston rod 11 by the gap width.
  • Guide rings 19 are provided for guiding the movements of the pistons 7, 9.
  • the sensor arrangement is designed differently.
  • the clamping jaws 31 thus have a measuring groove 35 which extends radially inwards from the outer surface of the clamping jaws 31.
  • a measuring recess can also be provided, which does not extend in the direction of the U around the clamping jaws 31 as shown in FIGS. 6 to 9, but only represents a recess at one or more points of the clamping jaws. In this case, however, it is important to ensure correct positioning relative to a distance sensor, the function of which is described in more detail below.
  • clamping jaws 31 have a measuring opening 29 which extends in the radial direction and which allows electromagnetic radiation, in particular one
  • P C ⁇ P rt s P 4 N ao ⁇ a P ⁇ - ⁇ - ⁇ ⁇ C ⁇ ⁇ > iQ N cn poi ⁇ rt ⁇ - rt rt i ⁇ - rt ⁇ ⁇ P li a ⁇ - ⁇ rt o TJ o J3 PJ rt s ⁇ - PJ ii cn PHP s: P ⁇ P ⁇ li N ⁇ SH * »H ⁇ PJ a
  • the first distance sensor 37 can now measure the distance to the outer surface of the tube 2.
  • the first distance sensor 37 outputs a corresponding measurement signal to the controller 41 via the first signal line 43.
  • the controller 41 now checks whether the tube 2 has the correct outside diameter or whether the correct measurement signal has been received. If this is the case, the controller 41 starts the clamping and forming process.
  • the outer piston 7 is first moved by a compression length L in the axial direction (to the left in the illustration of FIG. 8).
  • a hydraulic medium is passed through the first pressure connection 25 into the first pressure chamber 26.
  • the first distance sensor 37 measures the distance to the conical surface 6 of the outer piston 7 and continuously outputs a measurement signal to the controller 41. If the distance between the annular surfaces of the first actuating surface 10 and the second actuating surface 12 is equal to the compression length L, and if the first distance sensor 37 has sent a corresponding measurement signal to the controller 41, the controller 41 stops the supply of hydraulic medium into the first pressure chamber 26 , so that the movement of the outer piston 7 is stopped.
  • FIGS. 9 and 10 the actual clamping and shaping of the tube 2 begins, as is described in principle for the exemplary embodiment already shown in FIGS. 1 to 5, the controller 41 supplying the hydraulic medium starts through the second pressure connection 27 in the second pressure chamber 28. From this operating state shown in Figure 9, the clamping and Forming work as already described for the exemplary embodiment according to FIGS. 1 to 5.
  • the compression length L does not exactly correspond to the actual path by which the end of the tube 2 is compressed in the axial direction. A precise presetting of the desired compression path is still possible.
  • Another factor that can lead to an inequality of the compression length L and the actual compression path is the resilience or elasticity of the material connection between the outer piston 7 and the clamping jaws 31. In particular, elastic materials can be used there, for example to reduce noise effect or to prevent wear.
  • the second distance sensor 39 measures through the measurement opening 29 the distance to the bead 36 formed on the outer circumference of the tube 2 due to the deformation. There is a corresponding measurement signal from the second distance sensor to the controller 41 via the second signal line 45.
  • the current measured value is compared with a target value and it is determined whether the bead 36 has reached the desired outer diameter.
  • the forming can be ended by the control 41 determining that the bead 36 has reached the desired outer diameter and stopping the upsetting process.
  • the compression length L serves to ensure that a sufficiently long compression path is available.
  • the second pressure chamber 28 is relieved of pressure, that is to say the hydraulic medium located therein is allowed to flow out of the second pressure chamber 28. Furthermore, pressure medium is introduced into the first pressure chamber 26 via the first pressure connection 25. As a result, the inner piston 9 is retracted to the right in the axial direction while displacing the pressure medium in the second pressure chamber 28. The hydraulic medium in the first pressure chamber 26 is then relieved of pressure by opening the shut-off valve, so that it can flow out of the pressure chamber 26.
  • the outer piston 7 is moved back into its starting position shown in FIG. 6 by the spring force of one or more springs, not shown in detail. The jaws 31 release the formed tube 2 so that this can be removed.
  • 3rd light-emitting diode advance of the outer bulb, adjustment of compression length L completed,
  • an error occurs, it can be read on the display device 47 in which operating phase or in which operating state the error occurred.
  • a further light-emitting diode (not shown) can be provided, which indicates the termination when the forming process is terminated.
  • an error in the corresponding operating phase can be indicated by intermittent lighting up of a light-emitting diode.
  • An error can also be indicated, for example, by virtue of the fact that one of the light-emitting diodes does not light up, but a light-emitting diode arranged downstream in the sequence lights up.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Jigs For Machine Tools (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Turning (AREA)
  • Gripping On Spindles (AREA)
  • Forging (AREA)

Abstract

L'invention concerne un dispositif pour le formage d'une zone d'extrémité d'une pièce à usiner (2), notamment pour le formage par pression à froid d'une extrémité de tuyau, qui comprend deux éléments de transmission (7, 9) conduits dans un carter commun (3). Le dispositif selon l'invention est caractérisé en ce qu'une première chambre de pression (26) est logée entre les deux éléments de transmission (7, 9) et en ce qu'une deuxième chambre de pression (28) est affectée au deuxième élément de transmission (9). Lorsque le premier élément de transmission (7) est en position de serrage, le deuxième élément de transmission (9) peut être déplacé par rapport au premier élément de transmission (7) pour le formage de la pièce.
EP01971612A 2000-08-16 2001-08-11 Dispositif pour le formage d'une zone d'extremite d'une piece a usiner Expired - Lifetime EP1311358B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2000140596 DE10040596C1 (de) 2000-08-16 2000-08-16 Vorrichtung zum Umformen eines Werkstück-Endbereichs
DE10040596 2000-08-16
DE10040595 2000-08-16
DE2000140595 DE10040595C2 (de) 2000-08-16 2000-08-16 Vorrichtung zum Umformen eines Werkstück-Endbereichs
PCT/DE2001/003117 WO2002013992A1 (fr) 2000-08-16 2001-08-11 Dispositif pour le formage d'une zone d'extremite d'une piece a usiner

Publications (2)

Publication Number Publication Date
EP1311358A1 true EP1311358A1 (fr) 2003-05-21
EP1311358B1 EP1311358B1 (fr) 2005-04-20

Family

ID=26006747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01971612A Expired - Lifetime EP1311358B1 (fr) 2000-08-16 2001-08-11 Dispositif pour le formage d'une zone d'extremite d'une piece a usiner

Country Status (12)

Country Link
US (1) US6708548B2 (fr)
EP (1) EP1311358B1 (fr)
JP (1) JP2004505781A (fr)
KR (1) KR20030004362A (fr)
CN (1) CN1447724A (fr)
AT (1) ATE293502T1 (fr)
AU (1) AU2001291601A1 (fr)
CZ (1) CZ20022818A3 (fr)
DE (1) DE50105967D1 (fr)
ES (1) ES2240518T3 (fr)
NO (1) NO321883B1 (fr)
WO (1) WO2002013992A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2015140280A1 (fr) * 2014-03-20 2015-09-24 Voss Fluid Gmbh Outil de formage d'une pièce et dispositif de déformation d'une pièce avec un tel outil
US10449588B2 (en) 2014-03-20 2019-10-22 Voss Fluid Gmbh Shaping tool for a workpiece, and device for deforming a workpiece using such a tool

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CZ20022818A3 (cs) 2003-06-18
JP2004505781A (ja) 2004-02-26
WO2002013992A1 (fr) 2002-02-21
ATE293502T1 (de) 2005-05-15
NO20025877D0 (no) 2002-12-06
NO321883B1 (no) 2006-07-17
DE50105967D1 (de) 2005-05-25
US6708548B2 (en) 2004-03-23
EP1311358B1 (fr) 2005-04-20
KR20030004362A (ko) 2003-01-14
NO20025877L (no) 2002-12-06
CN1447724A (zh) 2003-10-08
AU2001291601A1 (en) 2002-02-25
US20030046969A1 (en) 2003-03-13
ES2240518T3 (es) 2005-10-16

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