EP2114587A1 - Presse de formage présentant une fonction de coussin pneumatique intégrée au plateau coulissant - Google Patents

Presse de formage présentant une fonction de coussin pneumatique intégrée au plateau coulissant

Info

Publication number
EP2114587A1
EP2114587A1 EP07846246A EP07846246A EP2114587A1 EP 2114587 A1 EP2114587 A1 EP 2114587A1 EP 07846246 A EP07846246 A EP 07846246A EP 07846246 A EP07846246 A EP 07846246A EP 2114587 A1 EP2114587 A1 EP 2114587A1
Authority
EP
European Patent Office
Prior art keywords
press
drives
sliding table
press according
die cushion
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
EP07846246A
Other languages
German (de)
English (en)
Other versions
EP2114587B1 (fr
Inventor
Thomas Spiesshofer
Mathias Liewald
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.)
Mueller Weingarten AG
Original Assignee
Mueller Weingarten 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 Mueller Weingarten AG filed Critical Mueller Weingarten AG
Publication of EP2114587A1 publication Critical patent/EP2114587A1/fr
Application granted granted Critical
Publication of EP2114587B1 publication Critical patent/EP2114587B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • B21D24/04—Blank holders; Mounting means therefor

Definitions

  • the invention relates to a forming press in which the die cushion functionalities or parts thereof are integrated in one or more sliding tables.
  • Cushions are used to hold down during deep drawing in presses. This prevents wrinkling or cracking and, thanks to the simultaneous ejector function, raises the parts to the transport level at the ram return.
  • the workpiece is clamped between a special plate holder and the descending upper tool.
  • the force applied by the plunger during the decline force must counteract a counter force on a controlled reproducing device.
  • the counterforce is applied to the blank holder by an underlying pressure cheek.
  • EP 0 417 754 B1 discloses a die cushion apparatus in which the impact of the impact pad
  • Characteristic of all hydraulically and pneumatically actuated die cushion is the very high control and regulatory effort to achieve the desired displacement and force functions.
  • EP 1 082 185 B1 discloses a deep-drawing press with a press ram driven by a threaded spindle and spindle nut as well as die cushions.
  • the movement of the die cushion is achieved in this embodiment exclusively by electronic drives, which are connected via spindle nut and threaded spindle with the pressure cheek.
  • Both the hydraulic and pneumatic, as well as the NC-controlled electrically driven die cushion as described in the prior art are arranged in the region of the press table. That means for the regulation of the blank holder force, that this must be readjusted for each new tool. Due to the arrangement of the die cushion in the table, it is usually not possible to retrofit existing presses without die cushion with such. As a rule, the installation spaces in an existing press table are unsuitable for the installation of a die cushion.
  • the invention has for its object to develop a die cushion for a forming press, which is compact and inexpensive in construction and which can be retrofitted for existing presses.
  • the invention is based on the idea to develop a forming press, in which the die cushion functionalities are fully or partially integrated into a sliding table.
  • the integration of the die cushion in the sliding table has the advantage that existing forming presses, which so far no
  • this sliding table cushion has, can be retrofitted.
  • this sliding table cushion has a cushioning functionality with respect to tools described in the prior art significant cost advantage.
  • This cost advantage is due to the fact that not for each tool the corresponding die cushion components must be provided, but only for one or two sliding tables.
  • two sliding tables are equipped with the drawing devices according to the invention in a forming system.
  • This embodiment variant has the advantage that preparatory measures and adjustments can already be carried out before a tool change on the sliding table remaining outside the press with the die cushion according to the invention. As a result, the tool change can be performed very quickly and the production can be resumed quickly with the new tools.
  • a further embodiment of the die cushion device according to the invention is that partial functions of the die cushion are arranged both in the sliding table and in the press table. So it is conceivable, for example, that the force functions that are effective during the drawing process in the sliding table, and the path functions that are effective outside of the drawing process are housed in the press table.
  • a further advantageous embodiment of the die cushion according to the invention is that the pressure bolts, which are moved by the above-mentioned die cushion drives, directly act on a segment elastic sheet metal holder.
  • the use of a conventional plate holder is also possible,
  • Figure 1 sliding table of a forming press with integrated die cushion
  • Figure 1 shows a mobile sliding table 1 and a press table 2 of a forming press not shown here.
  • the sliding table 1 In the illustrated position, the sliding table 1 is moved into the forming press and lowered onto the press table 2.
  • a die cushion 3 In the interior of the sliding table 1 is a die cushion 3. This die cushion 3 is completely integrated into the sliding table 1 and is also in a tool change together with the sliding table 1 out of the forming press, or driven into the forming press.
  • the connecting plate 8 is connected at its outer ends in each case with a piston rod 10 and a piston 11 of a cylinder 12.
  • the pressure pins 9 are retracted into the sliding table plate 4.
  • the pressure pins 9 were displaced during the forming process by the movement of the plunger and the sheet holder down and are now in their lowest position.
  • the force which is applied by the die cushion 3 during the forming process can be regulated via the cylinders 5, which in this case are designed as double-acting cylinders.
  • each cylinder individually, as well as several cylinders can be controlled in combination. If several cylinders are controlled together, the cylinder chambers can be interconnected.
  • the oil is supplied via 1 horizontal holes 13.
  • the die cushion 3 After the forming process, the die cushion 3 must be moved upwards again.
  • piston 11 of the cylinder 12 is pressurized, so that the piston rods 10 are moved together with the connecting plate 8 upwards.
  • the piston rods 7 of the cylinder 5 are taken from the connecting plate 8 in its upward movement. This ensures a synchronization of the piston rods 7 and causes the pressure pin 9 extend upward from the sliding table plate 4 and move the blank holder in its upper position.
  • the connecting plate 8 leads in its downward movement ahead of the lower ends of the piston rods 7, so that no contact between the piston rods 7 and the connecting plate 8 is formed and a regulation of the blank holder forces by the cylinder 5 is possible.
  • the arrangement of the cylinders 12 and 5 is variable and adaptable to the given requirements.
  • the cylinders 5 are designed as single-acting cylinders.
  • the connecting plate 8 would then penetrated in the downward movement of the piston 6 of the piston rods 7 and taken in the upward movement by a stop at the end of the piston rods 7 upwards.
  • the cylinders 12 would then build up a back pressure in the upward movement of the cylinder 5 to ensure synchronization.
  • This embodiment has the advantage that not all pressure pin 9 must be plugged because the cylinder 5 are designed to be single acting.
  • FIG. 2 shows another possibility for integrating die cushion functions into the sliding table. Not all are in this embodiment
  • the cylinder 5 with the piston 6 and the piston rods 7 are constructed in their structure and in their function the same as described in the first embodiment. They serve the controlled introduction of force into the blank holder during the forming process.
  • the connecting plate 8 is connected to a cylinder 8, which is located in the press table 2.
  • the connecting plate 8 is thus no longer part of the sliding table 1, but the press table 2 and thus remains even with a tool change and extending sliding table 1 in the forming press.
  • the cylinder 14 performs substantially the same tasks as the cylinder 12 in the first embodiment. Instead of a central cylinder 14, a plurality of cylinders can also be used to move the connecting plate 8 and thus the die cushion 3.
  • Cylinder 5 are designed so that the pressure pin 9 can not only be inserted centrally into the cylinder 5, but at different slots on the cylinder surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention concerne une presse de formage dont les fonctions de coussin pneumatique (3) ou des éléments du coussin pneumatique, tels que par ex. les entraînements (5) et les éléments de transmission de mouvement et de force, sont intégrés à un ou plusieurs plateaux coulissants (1).
EP07846246A 2006-11-30 2007-09-22 Presse de formage présentant une fonction de coussin pneumatique intégrée au plateau coulissant Not-in-force EP2114587B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610057051 DE102006057051A1 (de) 2006-11-30 2006-11-30 Umformpresse mit im Schiebetisch integrierter Ziehkissenfunktionalität
PCT/DE2007/001717 WO2008064619A1 (fr) 2006-11-30 2007-09-22 Presse de formage présentant une fonction de coussin pneumatique intégrée au plateau coulissant

Publications (2)

Publication Number Publication Date
EP2114587A1 true EP2114587A1 (fr) 2009-11-11
EP2114587B1 EP2114587B1 (fr) 2012-07-11

Family

ID=39232893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07846246A Not-in-force EP2114587B1 (fr) 2006-11-30 2007-09-22 Presse de formage présentant une fonction de coussin pneumatique intégrée au plateau coulissant

Country Status (5)

Country Link
EP (1) EP2114587B1 (fr)
CN (1) CN101541447B (fr)
DE (1) DE102006057051A1 (fr)
ES (1) ES2391210T3 (fr)
WO (1) WO2008064619A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101846106B (zh) * 2010-05-28 2012-10-17 南京航海仪器二厂有限公司 液压油缸动态同步分配器
CN108869464B (zh) * 2018-08-02 2024-04-05 深圳领威科技有限公司 一种液压装置、热室压铸机及液压装置的使用方法
CN112275938A (zh) * 2020-11-25 2021-01-29 浙江旸谷科技有限公司 一种自动化钣金部件上料加工成型装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942354A (en) * 1974-11-14 1976-03-09 Dayton Progress Corporation Die unit with quick change features
DE59002628D1 (de) 1989-09-12 1993-10-14 Mueller Weingarten Maschf Mechanische oder hydraulische Presse mit Zieheinrichtung oder Ziehstufe einer Stufenpresse.
DE69201769T2 (de) * 1991-09-04 1995-08-24 Toyota Motor Co Ltd Hydraulische Polsteranordnung für eine Presse, mit einem Absperrventil zum Abschalten der Energieversorgung der Druckbolzen beim Kontakt des beweglichen Werkzeugs mit dem Werkstück.
DE19821159A1 (de) 1998-05-12 1999-11-25 Johannes Huelshorst Tiefziehpresse
CN1351911A (zh) * 2001-12-11 2002-06-05 上海交通大学 单动拉深液压实验机
JP4722558B2 (ja) * 2004-06-01 2011-07-13 株式会社小松製作所 ダイクッション装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008064619A1 *

Also Published As

Publication number Publication date
ES2391210T3 (es) 2012-11-22
EP2114587B1 (fr) 2012-07-11
CN101541447A (zh) 2009-09-23
WO2008064619A1 (fr) 2008-06-05
CN101541447B (zh) 2012-06-13
DE102006057051A1 (de) 2008-07-03

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