Device and method for shaping sheet metal

Abstract

A device and a method are provided for shaping sheet metal. The device is provided with a plurality of support and clamping elements which are designed to cooperate with one another so as to clamp the sheet metal for a shaping process by mechanically contacting the sheet metal and by holding, orienting, and/or positioning processes. A plurality of actuators are designed to orient and/or position the plurality of support and clamping elements. A controller for the actuators is designed to control the plurality of actuators for adjusting the orientation and/or position of the support and clamping elements.

Claims

1. A device for shaping a metal sheet, comprising: a plurality of clamps which are configured to assume various positions and orientations by being configured to move at least linearly, cooperate with one another so as to support and clamp the metal sheet for a shaping operation by mechanically contacting the metal sheet, and orient and position the metal sheet, a plurality of actuators which are configured to orientate and position the plurality of clamps; a controller for the plurality of actuators, wherein the controller is configured to: detect a respective actual orientation and actual position of the clamps, control the plurality of actuators so as to effect an adjustment correction of the orientation and position of the plurality of clamps, generate the adjustment correction while simultaneously storing adjustment correction measures, generate and receive a correction signal which is representative of the adjustment correction of the orientation and position of the plurality of clamps, and based on the correction signal, by bringing about a corresponding actuation of the actuators, bring about the adjustment correction of the orientation and position of the plurality of clamps; and at least one sensor element configured as an additional and separate means to detect the position and orientation of the clamps, wherein only actuators that are upstream and downstream of a region to be shaped are actuated prior to the shaping of the metal sheet.

2. The device as claimed in claim 1, wherein the controller is further configured to: compare the respective actual orientation and the actual position of the plurality of clamps with a respective desired orientation and desired position of the plurality of clamps, and based on a result of the comparison, generate the correction signal which is representative of the adjustment correction of the orientation and position of the plurality of clamps.

3. A method for shaping a metal sheet, the method comprising the acts of: shaping the metal sheet by clamping the metal sheet with a plurality of clamps configured to assume various positions and orientations by being configured to move at least linearly, cooperate with one another so as to clamp the metal sheet by mechanically contacting the metal sheet, and support, orient, and position the metal sheet; detecting an actual orientation and actual position of the clamps using a controller and separately using at least one sensor element, generating adjustment correction measures while simultaneously storing the adjustment correction measures; generating and receiving a correction signal which is representative of the adjustment correction measures of an orientation and position of the plurality of clamps and based on the correction signal, by bringing about a corresponding actuation of actuators, bring about an adjustment correction of the orientation and position of the plurality of clamps, wherein only actuators that are upstream and downstream of a region to be shaped are actuated prior to the shaping of the metal sheet.

4. The method as claimed in claim 3, further comprising: comparing the respective actual orientation and the actual position of the plurality of clamps with a respective desired orientation and desired position of the plurality of clamps, and generating, based on a result of the comparison, the correction signal, which is representative of the adjustment correction measures of the orientation and position of the plurality of clamps.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGS. 1 to 4 are schematic side views of an embodiment of the device according to the invention for shaping a metal sheet in different operating states, which correspond to different phases of an embodiment of the method according to the invention for shaping a metal sheet.

DETAILED DESCRIPTION OF THE DRAWINGS

(2) With reference to FIGS. 1 to 4, embodiments of the invention will be described in detail below. Elements and components which are identical and equivalent and which have an identical or equivalent action are provided with the same reference numerals. The detailed description of the elements and components described is not reproduced each time they occur.

(3) The features and additional properties set out may be separated from each other in any form and freely combined with each other without departing from the central notion of the invention.

(4) FIG. 1 shows an embodiment of the device 100 for shaping a metal sheet 1 as a schematic side view in a first operating state.

(5) The device 100 for shaping a metal sheet according to FIG. 1 includes a plurality of support and clamping elements 11, 12 and 13 which can be adjusted and adapted by way of actuators 21, 22 and 23 in terms of the position and/or orientation thereof with respect to a metal sheet 1 which is intended to be shaped.

(6) The actuators 21, 22 and 23 are connected by a control line 20 to a control device 10 of the device 100. The control line 20 may also be understood to be a detection and control line 20 since it may also be configured to provide from the individual actuators 21, 22 and 23 and the support and clamping elements 11, 12 and 13 connected thereto a feedback to the control device 10 of the device 100 for evaluating and assessing an actual state of the metal sheet 1 and/or the arrangement comprising the actuators 21, 22 and 23 and the support and clamping elements 11, 12 and 13.

(7) The metal sheet 1 has an upper side 1-1 and a lower side 1-2 and is arranged in the schematic illustration according to FIG. 1 so as to extend in a plane perpendicular to the drawing plane.

(8) In the state according to FIG. 1, all of the actuators 21, 22 and 23 are arranged in an idle or starting position. Therefore, all the support and clamping elements 11, 12 and 13 are spatially spaced apart from the upper side 1-1 and the lower side 1-2 of the metal sheet 1 and do not touch the metal sheet 1.

(9) During transition to the state illustrated in FIG. 2, the external actuators 21 are activated so that the first support and clamping elements 11 are moved toward the upper side 1-1 or the lower side 1-2 of the metal sheet 1, touch it mechanically, and clamp and fix it between them. In this manner, the portion of the metal sheet 1 arranged between the first support and clamping elements 11 is fixed in the manner of a clamping frame, this is required for the following shaping processes.

(10) During transition to the intermediate state illustrated in the Figures, second support and clamping elements 12 are moved toward the upper side 1-1 of the metal sheet 1 in such a manner that they follow in the manner of a support point distribution approximately a shape 1-3 desired for the metal sheet 1. This desired shape 1-3 for the metal sheet 1, which is intended to be achieved by the shaping process by the device 100 using the correct method, is illustrated in FIG. 3 with broken lines.

(11) During transition to the intermediate state illustrated in FIG. 4, a third support and clamping element 13 is moved from below toward the lower side 1-2 of the metal sheet 1 in such a manner that the third support and clamping element 13 touches the lower side 1-2 of the metal sheet 1 and moves from the idle position designated 1 in FIG. 4 upward in the direction toward the second support and clamping elements 12 in order to produce an actual shape 1-3 of the metal sheet 1 which follows or corresponds to the path of the contact locations with the second and third support and clamping elements 12 and 13.

(12) If a comparison of the actual shape 1-3 of the metal sheet 1 results in a deviation being established, for example, in comparison with a desired shape 1-4 of the metal sheet 1, it is thus possible during the production process, for example, during the production of subsequent components, for the control of the third actuator 23 by the control device 10 via the control line 20 to result, by changing the actuation of the third actuator 23, in the third support and clamping element 13 being displaced into the position designated 13 in FIG. 4 so that the actual shape 1-3 approximates as well as possible the desired shape 1-4 of the metal sheet 1 in the following production process.

(13) These features and other features and properties of the present invention are further explained with reference to the following statements.

(14) Currently, the receiving and clamping situations which are found primarily in the main lines are adjusted manually by the persons responsible for dimensions and methodologists to process-optimized dimension compliance. Any changes should accordingly be documented in order to make the effects comprehensible.

(15) This is disadvantageous since, inter alia, no derivative-specific geometry adaptation is possible and a high level of complexity during the establishment and documentation of the tool adjustment is required since both the product and tool tolerances have to be detected and established in a station-specific manner.

(16) As a result of the use of flexible floor clamping technology or clamping technology in general, which can be freely programmed and/or adjusted in several directions, it is possible to adjust geometry-determining dimensions within a production system continuously by use of software, for example, by use of an adapted input mask. This is also possible in a derivative-specific or type-specific manner.

(17) The complex manual adaptation to the tools which may also lead to errors between the different derivatives is omitted.

(18) As a result of the optionally generally continuous individual adaptation which can be selected specifically, the overall modification complexity is reduced and automatically documented so as to be able to be understood. The previously conventional shim records, which are generally kept manually when shim plates are used, is consequently virtually digitized.

LIST OF REFERENCE NUMERALS

(19) 1 Metal sheet 1-1 Upper side 1-2 Lower side 1-3 Actual shape 1-3 Intended shape 1-4 Desired shape 10 Control device 11 Support and clamping element 12 Support and clamping element 13 Support and clamping element 20 Control and detection line 21 Actuator 22 Actuator 23 Actuator 100 Device

(20) The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.