• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for bending metal sheets (3) with a die (1), with a punch (2) pushing a metal sheet (3) into the die (1) under a bending process, and with an optical measuring device (5) for detecting the respective bending angle of the sheet (3) described by triangulation. In order to provide advantageous measuring conditions, it is proposed that the die (1) and / or the punch (2) have at least one measuring slot (9), which is perpendicular to the bending line and open towards the plate (3), with a receptacle (12) for the measuring device (12). 5), which has a row of transmitters (6) aligned in the slot plane extending at least over the region of the measuring slot (9) for laser beams (7) running parallel in the bending direction and at least one line camera (8) for triangulation detection on the sheet metal (3 ) comprises reflected laser beams.
    公开号:AT511358A4
    申请号:T15752011
    申请日:2011-10-27
    公开日:2012-11-15
    发明作者:
    申请人:Sensortechnik Gmbh H；
    IPC主号:
    专利说明:

    (38223) II
    The invention relates to a device for bending sheets with a die, with a stamping a sheet under a bending operation in the die punch and with an optical measuring device for detecting the respective bending angle of the sheet by triangulation.
    In devices for bending metal sheets, it is advantageous to continuously detect the bending angle during the bending process, so that material-dependent springbacks in the course of the bending process can be taken into account and workpieces can be obtained which have a bend corresponding to the desired angle without further processing. In bending devices with a die to be machined receiving die and a punching the plate in the die stamping it is known to detect the respective bending angle to use optical measuring devices that detect the bending angle by triangulation in the light section method. For this purpose, a straight line of light is projected onto the outer side of the sheet to be bent with the aid of a laser beam, and this light section is continuously measured by triangulation using a line scan camera, so that the respective bending angle of the reference beam is measured over the measured distance of the light section curved sheet leg can be determined. In order that the measuring device for the bending angle can be aligned with respect to the length of the sheet to be bent measured in the direction of the bending line, the measuring device is accommodated on a slide movable along the die. The disadvantage of this known measuring device is, above all, that the bending angle can only be measured at over the die protruding sheet metal legs, which can lead to shading of the measured sheet leg by already bent sheet metal sections especially in multiple bends. 2: · · ·
    The invention is therefore based on the object, a device of the type described for bending of sheets in such a way that advantageous conditions for accurate and simple detection of the respective bending angle of a sheet metal workpiece can be guaranteed.
    The invention achieves this object by the fact that the die and / or die have at least one measuring slot which is perpendicular to the bending line and open towards the metal sheet, with a receptacle for the measuring device which has a row of slots aligned in the slot plane, at least over the region of the measuring slot Transmitters for parallel in the direction of bending laser beams and at least one line scan camera for Triangulationserfassung the laser beam reflected at the sheet comprises.
    By providing measuring slits perpendicular to the bending line in the die and / or in the punch, the bending angles can also be detected in the region of the die and / or the punch, because parallel laser beams extending in the bending direction through these measuring slits can be directed onto the sheet to be bent in order to be able to detect the respective bending angle of the sheet-metal limb marked in this way on the basis of the light points of the laser beams reflected on the sheet surface in a section line of the sheet metal surface with a measuring plane perpendicular to the bending line. This means that the bending wedge! Small Blechschenkelabschnitte can be determined continuously within the die, not only from the side of the die ago, but also from the stamp side, which allows a largely independent of already made bends, non-contact bending angle detection.
    So that an adaptation of the measuring position to the position of the workpieces and their size in a relatively simple manner is possible, without having to do without a good measurement accuracy, the die and / or the punch on their extending in the direction of the bending line length measuring slots with recordings for selectively inserting the summarized in a housing measuring device. The measurement slots prepared in the die or in the stamp can thus be selected, if necessary, for the use of a measuring device of the type described, wherein only the housing of the measuring device, which can hermetically record all functionally essential components, including the power supply, the evaluation units and the data transmission, in which the respective, the individual measuring slots associated recording needs to be used to make measurements of the bending angle can.
    The detection of the light spots of the reflected laser beams for triangulation can advantageously be carried out by two line scan cameras arranged on both sides of the row of transmitters for the laser beams, which brings about good detection conditions for the light spots, in particular in the area of the die. But it is also possible that the measuring device has only one line camera in the middle of the row of transmitters for the laser beams. Such a camera arrangement is especially advantageous for detecting the bending angle on the inside of the bend from the stamp.
    So that the measuring slots in the punch or in the die can not leave corresponding markings in the workpieces to be formed, the measuring slots in the punch and in the die can be closed in the contact area of the sheet on the punch or on the die, so that in these areas over the Matrizen- or punch length continuous bearing surface for the sheets results, whereby the risk that the edges of the measuring slots are impressed into the workpiece during the bending process, is avoided.
    In the drawing, the subject invention is shown, for example. Show it
    1 shows a device according to the invention for bending sheets in a cross section perpendicular to the bending line in the region of a measuring slot of the die and the punch,
    Fig. 2 is a section along the line II-H of Fig. 1 and
    Fig. 3 shows an embodiment of a measuring device in one of the Fig. 1 corresponding, based only on the stamp representation.
    The schematically indicated device for bending of sheets has, according to FIGS. 1 and 2, a stationary die 1 and a die 1, which can be acted upon by a pressure force, on a die 3 inserted between die 1 and die 2 with the aid of the Stamp 2 to press under a corresponding bending operation in the die 1. The die 1 facing the longitudinal edge of the punch 2 forms the bending line for the sheet 3, the respective bending angle to be detected. This bending angle results between the sheet metal legs 4 on both sides of the bending line.
    In order to detect the bending angle, at least one measuring device 5 is provided, which is equipped with transmitters 6 indicated by dashed laser beams 7, which are parallel to each other in the bending direction and lie in a plane perpendicular to the bending line and on the measuring device 5 facing surface of the sheet leg. 4 Imaged light points that are detected by means of line scan cameras 8, in particular on CCD basis for triangulation. From the distance of the points of light of the reflected laser beams 7 determined by means of triangulation, a straight line perpendicular to the bending line can be determined on the sheet metal legs 4, which represents an angle leg of the bending angle to be measured, so that the inclination of this straight line relative to a reference line given by the measuring device 5 the respective bending angle between the two metal legs 4 can be calculated.
    In order that the light points required for detecting the bending angle can also be projected onto the sheet metal surface in the area of the die 1 and the punch 2, the die 1 and the punch 2 are provided with measuring slots 9 distributed over their length extending in the direction of the bending line run perpendicular to the bending line and against the sheet metal legs 4 with the exception of a narrow edge portion 10 are open. The closure of these edge regions 10 of the measuring slots 9 in the contact region of the sheet 3 is necessary because
    Otherwise, when the sheet 3 is subjected to the required bending forces, the slot edges are impressed on the sheet surface, which should generally be avoided.
    As is apparent from FIGS. 1 and 2, the measuring devices 5 are housed in a substantially closed housing 11, so that the measuring device 5 can be used as a unit either in a provided in the die 1 and the stamp 2 shots 12, the associated with each measuring slot 9. By selectively inserting a measuring device 5 in the prepared receptacles 12 of the die 1 and the stamp 2, the measuring position of the measuring device 5 can be easily adapted to the respective requirements, depending on the case of need the bending angle on the inside and or outside of the bent sheet 3 can be determined, even within the die 1 or in the immediate connection area to the stamp. 2
    Although the arrangement of the line scan cameras 8 on both sides of the row of transmitters 6 for the laser beams 7 allows in most cases an advantageous detection of the respective bending angle, such a camera arrangement is not mandatory. As is apparent from Fig. 3, it is also possible to arrange the line camera 8 in the middle of the row of transmitters 6 for the laser beams 7, which is particularly in the detection of the bending angle on the inside of the bend, ie on the stamp second facing surface of the sheet 3, may be advantageous.
    权利要求:
    Claims (5)
    [1]
    Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. Karl Winfried Hellmich Spittelwiese 7, A 4020 Linz (38223) II Claims: 1. Apparatus for bending metal sheets (3) with a die (1), with a die pressing a metal sheet (3) into the die (1) during a bending operation (2) and with an optical measuring device (5) for detecting the respective bending angle of the sheet (3) by triangulation, characterized in that the die (1) and / or the punch (2) at least one perpendicular to the bending line, the sheet ( 3) towards an open measuring slot (9) with a receptacle (12) for the measuring device (5) which extends at least over the region of the measuring slot (9) extending series of aligned in the slot plane transmitters (6) parallel in the bending direction Laser beams (7) and at least one line scan camera (8) for Triangulationserfassung of the sheet metal (3) reflected laser beams.
    [2]
    2. Apparatus according to claim 1, characterized in that the die (1) and / or the punch (2) distributed over its extending in the direction of the bending line length measuring slots (9) with receptacles (12) for selectively inserting the in a housing (11) summarized measuring device (5).
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that the measuring device (5) has two on both sides of the row of transmitters (6) for the laser beams (7) arranged line scan cameras (8).
    [4]
    4. Apparatus according to claim 1 or 2, characterized in that the measuring device (5) has a line camera (8) in the middle of the row of transmitters (6) for the laser beams (7). fl fl «fl fl fl fl fl fl fl fl fl fl fl fl I I I I I I I I I I I I I......... t I * I »* * *« * · »flfl fl ·
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the measuring slots (9) in the punch (2) and in the die (1) in the contact region of the sheet (3) on the punch (2) or, on the die ( 1) are closed. Linz, on October 24, 2011 H-Sensortechnik GmbH by:

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    同族专利:
    公开号 | 公开日
    EP2771135B1|2015-08-05|
    EP2771135A2|2014-09-03|
    WO2013059851A2|2013-05-02|
    AT511358B1|2012-11-15|
    WO2013059851A3|2013-07-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH03259705A|1990-03-09|1991-11-19|Amada Co Ltd|Angle measuring instrument for bending machine|
    JPH03268818A|1990-03-15|1991-11-29|Amada Co Ltd|Angle measuring instrument for bender|
    JP2001018011A|1999-07-06|2001-01-23|Amada Eng Center Co Ltd|Method, device and die for detecting bending angle of work in press brake|
    DE19939837A1|1999-08-21|2001-03-29|Eht Werkzeugmaschinen Gmbh|Method and device for detecting a bending angle on a workpiece|
    DE69927597T2|1999-11-19|2006-06-01|Lvd-Company Nv|Method and device for folding angle measurement of a sheet in a folding machine|
    NL1013378C2|1999-10-22|2001-04-24|Best Quality B V|Apparatus and method for determining a bending angle of a plate and its use for setting plates.|AT515521B1|2014-07-23|2015-10-15|Trumpf Maschinen Austria Gmbh|Bending angle measuring device and method for measuring a bending angle by means of the bending angle measuring device|
    AT516465B1|2014-11-04|2016-08-15|Trumpf Maschinen Austria Gmbh & Co Kg|Bending tool with bending geometry measuring device|
    CN105057409A|2015-08-03|2015-11-18|湖北鸿路钢结构有限公司|Method capable of eliminating fringe effect and oxidation of titanium alloy sheet in laser forming|
    AT518560B1|2016-04-18|2018-01-15|Trumpf Maschinen Austria Gmbh & Co Kg|Bending beam for a folding machine|
    CN111112458B|2019-12-31|2021-08-27|东莞盛翔精密金属有限公司|Mold adjustment system and mold adjustment method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    AT15752011A|AT511358B1|2011-10-27|2011-10-27|DEVICE FOR BENDING TINS|AT15752011A| AT511358B1|2011-10-27|2011-10-27|DEVICE FOR BENDING TINS|
    PCT/AT2012/050169| WO2013059851A2|2011-10-27|2012-10-25|Device for bending metal sheets|
    EP12805557.1A| EP2771135B1|2011-10-27|2012-10-25|Device for bending metal sheets|
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