WO2001034319A1 - Deep drawing press and method for deep-drawing sheet-metal workpieces - Google Patents
Deep drawing press and method for deep-drawing sheet-metal workpieces Download PDFInfo
- Publication number
- WO2001034319A1 WO2001034319A1 PCT/EP2000/008047 EP0008047W WO0134319A1 WO 2001034319 A1 WO2001034319 A1 WO 2001034319A1 EP 0008047 W EP0008047 W EP 0008047W WO 0134319 A1 WO0134319 A1 WO 0134319A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cushion
- deep
- press
- cylinders
- tool
- Prior art date
Links
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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/02—Die-cushions
Definitions
- the invention relates to a deep-drawing press with a table-drawing cushion and a tool arrangement with at least one upper tool attached to a press ram, at least one sheet metal holder supported by cushion bolts and at least one lower tool in connection with a press table.
- a multi-point drawing cushion can be used in connection with a large tool, whereby the piston rods of the cushion cylinders, analogous to the cushion bolts, act directly on the sheet metal holder of the tool. If, on the other hand, several tools are attached over an undivided cushion, compensation boizen must be used for load compensation in the case of an off-center load, for which there is often no space available. Usually, the required sheet metal holder force is lower when using several smaller tools than with a large tool.
- the invention is therefore based on the object of improving a deep-drawing press of the type mentioned at the outset so that both large and small tools can be used in conjunction with an undivided cushion plate without undue stress on the cushion guide, and in all cases an improved method for deep-drawing sheet metal workpieces is achieved through improved sheet metal holder function.
- This object is achieved according to the invention in a deep-drawing press of the type mentioned at the outset in that a plurality of outer cushion cylinders can be engaged with an undivided cushion plate and these outer cushion cylinders are arranged at least in corner regions of the cushion plate.
- these outer cushion cylinders When forming sheet metal workpieces using large tools, these outer cushion cylinders only make up a small proportion of the total sheet holding force and are mainly used to compensate for tilting movements in the active system and to control the position of the top dead center of the cushion. They also take over the cushion pre-acceleration before the forming process, as well as the ejection of the workpiece after the forming process.
- the undivided cushion plate is preferably designed such that at least one cushion cylinder is arranged in the central region below the cushion plate in such a way that it presses against the cushion plate with a slight prestressing pressure. If the deep-drawing press is equipped with a large tool, these inner cylinders bear the major part of the forming force required. When using small tools, however, the inner cylinders can be excluded from power transmission by reducing the preload pressure.
- a control device which, depending on the displacement and pressure signals of the tool arrangement, brings about a pressurization of the inner and outer cushion cylinders.
- the pressure signals from all cylinder chambers of the cushion cylinders as well as the measured values of cushion and ram travel are compared with the target values for position and tilt detection.
- the valves of the cushion cylinders are then activated.
- smaller tools can also be used in the edge region of the deep-drawing press, for example in the case of a tool arrangement as a transfer tool
- a tool arrangement as a transfer tool
- only the outer cushion cylinders are pressurized to generate an eccentric cushion force
- both the outer cushion cylinders as well as the outer and the inner cushion cylinders can be pressurized in combination with one another. This enables the processing of the sheet metal workpieces with different throughput directions can be processed with an off-center cushion force
- 2-6 smaller tools can be machined in a rectangular arrangement in the transverse direction of the deep-drawing press
- the outer and inner cushion cylinders are pressurized in accordance with the inventive method in such a way that a total force is generated parallel to the press table or to the press ram
- FIG. 5 shows a spatial representation of a press table with an integrated pulling device
- FIG. 6 shows an exploded view of a press table acc. Figure 5;
- FIG. 8 shows a cushion plate with sensors for pressure p, cushion path ski and ram path sst
- Figure 1 shows an overview of the various tool assignments above the press table 6, which are explained in more detail below.
- Figure 1a) to 1c) show the assignment with a large tool 5, in Figure 1a) a central cushion force K, in Figure 1b) an eccentric cushion force K which can be changed via the cushion stroke and in Figure 1c) an influenceable load distribution K on the Drawing pens is generated.
- Figure 1d) the assignment with 2-3 smaller tools 5 for long, narrow parts and a pass in the longitudinal direction is shown with an eccentric cushion force K to be generated for 1 tool.
- Figure 1e) shows a tool arrangement with 2-6 smaller tools 5 in the rectangular arrangement for processing in the transverse direction of the deep-drawing press with a cushion force K for 1-2 tools. In all of these cases are preferably in the corner areas of the cushion plate 8 (which is not visible here, since it is under the press table 6) outer cushion cylinder 9 is provided for receiving the predominantly eccentric cushion force K, as will be explained in more detail below.
- FIG. 2 An embodiment of a transfer tool, in which only a relatively low forming force is necessary, is shown in FIG. 2.
- the outer cushion cylinders 9 not only take over the position control of the cushion plate 8, but also the entire sheet metal holder force required.
- additional inner cushion cylinders 10 can be pressurized.
- the inner cushion cylinders 10 bear the main part of the sheet metal holder force, the position control and the pre-acceleration of the cushion are again taken over by the outer cushion cylinders 9.
- FIG. 5 shows the lower area of a deep-drawing press for processing sheet metal workpieces, consisting of a press table 6 and an arrangement of outer and inner cushion cylinders 9, 10. Both the outer and the inner cushion cylinders 9, 10 are pressurized in a highly dynamic manner via adjacent compressed gas containers 12.
- the cushion plate assembly 8 is guided through the outer and the inner cushion cylinders 9, 10 in the press table.
- the outer cushion cylinders 9 are connected to the cushion plate 8 by means of bolts 13 through openings in the carrier 11.
- FIG. 7 shows schematically the arrangement for force and position control in the form of a sequence control by measuring the path on the plunger 1 by means of position transducers 13, and the path and pressure on all cushion cylinders 9, 10 by means of position sensors 14 and pressure sensors 15. The pressure signals p determined, the measured values of the cushion plate path ski and the measured values of the ram path sst serve, as shown in the control device 16 according to FIG.
- the tilt regulator in the x direction and the tilt regulator in y direction as well as a synchronization.
- the values of the cushion cylinders 9, 10 are in turn actuated with the determined values in order to achieve the required position of the cushion plate 8 and the required sheet metal holder force. Due to the individual control options of the stroke controller as well as the tilt controller in x- and y-projection, a total force of the cushion plate can be generated parallel to the press table and / or press ram even when the press table or press ram is inclined in the z direction. Likewise, due to the individual control of stroke and tilt regulators, the retraction of the sheet metal workpieces can be regulated by generating a total force of the cushion plate parallel to the table or ram.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Printing Methods (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001536306A JP2003513801A (en) | 1999-11-09 | 2000-08-17 | Deep drawing press and method for deep drawing of sheet metal workpiece |
EP00953175A EP1227904B1 (en) | 1999-11-09 | 2000-08-17 | Deep drawing press and method for deep-drawing sheet-metal workpieces |
DE50002932T DE50002932D1 (en) | 1999-11-09 | 2000-08-17 | THERMOFORMING PRESS AND METHOD FOR DEEP DRAWING OF SHEET METAL PIECES |
AT00953175T ATE245060T1 (en) | 1999-11-09 | 2000-08-17 | THERMAL DRAWING PRESS AND METHOD FOR THERMAL DRAWING OF SHEET METAL WORKPIECES |
US10/142,522 US20020184935A1 (en) | 1999-11-09 | 2002-05-09 | Deep-drawing press and method for deep-drawing sheet-metal workpieces |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19953860.3 | 1999-11-09 | ||
DE19953860A DE19953860A1 (en) | 1999-11-09 | 1999-11-09 | Thermoforming press and method for thermoforming sheet metal workpieces |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/142,522 Continuation US20020184935A1 (en) | 1999-11-09 | 2002-05-09 | Deep-drawing press and method for deep-drawing sheet-metal workpieces |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001034319A1 true WO2001034319A1 (en) | 2001-05-17 |
Family
ID=7928416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/008047 WO2001034319A1 (en) | 1999-11-09 | 2000-08-17 | Deep drawing press and method for deep-drawing sheet-metal workpieces |
Country Status (8)
Country | Link |
---|---|
US (1) | US20020184935A1 (en) |
EP (1) | EP1227904B1 (en) |
JP (1) | JP2003513801A (en) |
AT (1) | ATE245060T1 (en) |
DE (2) | DE19953860A1 (en) |
ES (1) | ES2202158T3 (en) |
PT (1) | PT1227904E (en) |
WO (1) | WO2001034319A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002090875A2 (en) | 2001-05-07 | 2002-11-14 | Northwestern University | Real-time draw-in sensors and methods of fabrication |
DE10334878A1 (en) * | 2003-07-29 | 2005-03-10 | Behr Gmbh & Co Kg | Stamping tool for plastic deformation of sheet metal workpiece has top cylindrical tool descending into bottom tool with socket to make circular depression in workpiece |
JP5680121B2 (en) * | 2013-01-24 | 2015-03-04 | アイダエンジニアリング株式会社 | Die cushion device and die cushion control method for press machine |
DE102017222629B4 (en) * | 2017-12-13 | 2020-02-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Substructure of a device designed for forming plate-shaped components |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1483204A (en) * | 1918-04-11 | 1924-02-12 | Marquette Tool & Mfg Co | Die cushion |
US3522939A (en) * | 1967-10-02 | 1970-08-04 | Dro Systems Inc Di | Metal working press cushion structure |
DE3242705A1 (en) * | 1982-11-19 | 1984-05-24 | Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten | Compressed-air device in a press table |
US5138857A (en) * | 1990-04-23 | 1992-08-18 | Maschinenfabrik Mueller-Weingarten Ag | Drawing device in a press for drawing shaped sheet-metal parts |
-
1999
- 1999-11-09 DE DE19953860A patent/DE19953860A1/en not_active Withdrawn
-
2000
- 2000-08-17 EP EP00953175A patent/EP1227904B1/en not_active Expired - Lifetime
- 2000-08-17 ES ES00953175T patent/ES2202158T3/en not_active Expired - Lifetime
- 2000-08-17 WO PCT/EP2000/008047 patent/WO2001034319A1/en active IP Right Grant
- 2000-08-17 JP JP2001536306A patent/JP2003513801A/en active Pending
- 2000-08-17 PT PT00953175T patent/PT1227904E/en unknown
- 2000-08-17 DE DE50002932T patent/DE50002932D1/en not_active Expired - Lifetime
- 2000-08-17 AT AT00953175T patent/ATE245060T1/en not_active IP Right Cessation
-
2002
- 2002-05-09 US US10/142,522 patent/US20020184935A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1483204A (en) * | 1918-04-11 | 1924-02-12 | Marquette Tool & Mfg Co | Die cushion |
US3522939A (en) * | 1967-10-02 | 1970-08-04 | Dro Systems Inc Di | Metal working press cushion structure |
DE3242705A1 (en) * | 1982-11-19 | 1984-05-24 | Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten | Compressed-air device in a press table |
US5138857A (en) * | 1990-04-23 | 1992-08-18 | Maschinenfabrik Mueller-Weingarten Ag | Drawing device in a press for drawing shaped sheet-metal parts |
Also Published As
Publication number | Publication date |
---|---|
JP2003513801A (en) | 2003-04-15 |
EP1227904A1 (en) | 2002-08-07 |
DE50002932D1 (en) | 2003-08-21 |
ATE245060T1 (en) | 2003-08-15 |
EP1227904B1 (en) | 2003-07-16 |
ES2202158T3 (en) | 2004-04-01 |
US20020184935A1 (en) | 2002-12-12 |
PT1227904E (en) | 2003-10-31 |
DE19953860A1 (en) | 2001-05-17 |
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