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Drive device for a bending press

A technology for bending presses and driving devices, applied in the direction of fluid pressure actuation devices, presses, mechanical equipment, etc., can solve problems such as hose rupture, leak tightness, leakage, etc.

Active Publication Date: 2010-09-15
TRUMPF MASCHEN AUSTRIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They present a risk of leakage due to leaks, hose ruptures or when replacing hydraulic components

Method used

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  • Drive device for a bending press
  • Drive device for a bending press
  • Drive device for a bending press

Examples

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Embodiment Construction

[0035] At the outset, it should be recognized that in the differently described embodiments the same components are provided with the same reference symbols or the same component designations, wherein the disclosure content contained in the entire description can be referred to with the same reference symbols or the same component designations. on the same part of the name. Positional indications selected in the description, such as top, bottom, side, etc., refer to the directly described and illustrated figure and can also be transferred to the new position in the event of a position change. Furthermore, individual features or combinations of features from the various exemplary embodiments shown and described can also form their own independent inventive solutions or solutions according to the invention.

[0036] In the specific description, all data in the value range should be understood as that they include any and all partial ranges, for example, data 1 to 10 refers to al...

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Abstract

The invention relates to a drive device (1) for a bending press, especially a folding press (2), comprising a press frame (3), a press table (9) and a press bar (11) that can be adjusted relative to the press table (9) via a hydraulic system (18) comprising a hydraulic pump (47), controlled drive motor (45), switch and control means and pressure lines and at least one pressure cylinder (12) whichcan be supplied with at least one pressure medium. The hydraulic system (18) forms a closed system together with a ring line (44) comprising the hydraulic pump (47), control valves (39, 41, 58, 84, 86, 87, 88, 89) and an accumulator (57). The ring line comprises a first line section (51) between a pressure chamber (23) of the pressure cylinder (12) and the hydraulic pump (47) and a second line section (53) between a second pressure chamber (22) of the pressure cylinder (12) and the hydraulic pump (47). The accumulator (57) can optionally be in fluid connection with the first line section (51)or the second line section (53) to take up or release a storage volume of the pressure medium.

Description

technical field [0001] The invention relates to a drive device as described in the preamble of claim 1 . Background technique [0002] From WO 2006 / 101156 A1 a hydraulic drive for a bending press and a method for operating such a device are known, according to which a rotational speed is used for the oil supply of the working cylinders in an open hydraulic system An adjustable motor operates a hydraulic pump. The speed can be variably controlled from stop to the highest speed according to different requirements according to the movement process such as fast stroke, pressure stroke, emergency stop, and return stroke. [0003] Another document DE 21 40 183 A1 discloses a hydraulic drive in an open design, comprising an oil tank, a pump and a supply line for supplying the pressure chamber of a working cylinder with pressure medium. The discharge of pressure medium from the other pressure chamber can be selectively fed to the inlet line via a switchover valve or returned to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B30B15/16B21D5/02F15B1/02F15B7/00
CPCF15B2211/7053F15B7/006F15B2211/20515B30B15/16F15B2211/88F15B2211/625F15B2211/212F15B11/024F15B2211/20561B30B15/163
Inventor M·雷施R·沙伊德尔P·拉德纳K·拉德纳
Owner TRUMPF MASCHEN AUSTRIA
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