• 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 bending beam (1) for a folding machine, wherein the elongated bending beam (1) has an approximately C-shaped beam cross-section (2) and two longitudinally opposite (3) with respect to a, preferably horizontal center plane (8). 24) of the bending beam (1) has extending bending tools (6, 7), between which a workpiece section (11) to be bent of a workpiece (9) can be inserted and wherein in the interior (10) of the C-shaped beam cross-section (2 ) an angle measuring system (17) for non-contact measurement of a bending angle (13) is arranged, with a on one of the bending tools (6, 7) bent workpiece portion (11) on a reference plane (12) related bending angle (13) measurable is. In this case, the angle measuring system (17) comprises a first angle measuring unit (18), which is arranged below the median plane (8) and has a first measuring area (20) lying predominantly above the median plane (8), and furthermore a second Angular measuring unit (19), which is arranged above the center plane (8) and has a second measuring range (21), which lies predominantly below the median plane (8).
    公开号:AT518560A1
    申请号:T50347/2016
    申请日:2016-04-18
    公开日:2017-11-15
    发明作者:
    申请人:Trumpf Maschinen Austria Gmbh & Co Kg；
    IPC主号:
    专利说明:

    The invention relates to a bending beam for a folding machine according to the preamble of claim 1 and to a method for measuring a bending angle on a workpiece in a folding machine according to the preamble of claim 11.
    The subject of the invention is referred to below as a bending beam, wherein also alternatively referred to as a cantilever or bending beam items are included.
    In order to meet the ever-increasing accuracy requirements for the bending angle achieved in bent workpieces in bending machines, there are already versions with angle measuring systems, with which the forming behavior of workpieces, in particular the springback, can be quantitatively recorded and taken into account in subsequent bending operations. For example, from JP H 07275952 A1 a folding machine is known, in which a tactile angle measuring system is integrated in the bending beam.
    Furthermore, WO 2004/108318 A1 discloses a folding machine with a non-contact angle measuring system which is integrated in a bending beam with a C-shaped beam cross-section.
    However, the existing solutions are limited to simple workpiece geometries and the applicability to the general increase in bending accuracy is very limited.
    The object of the present invention was to overcome the disadvantages of the prior art and to provide a device and a method are available by means of which a user is able to perform accurate bending angle measurements on folding machines in a variety of applications.
    This object is achieved by an apparatus and a method according to the claims.
    The inventive device consists in a bending beam for a folding machine, wherein the elongate bending beam has an approximately C-shaped beam cross-section and two with respect to a, preferably horizontal center plane opposite and facing each other extending in the longitudinal direction of the bending beam bending tools, between which a workpiece to be bent portion of a workpiece insertable is. In this case, an angle measuring system for non-contact measurement of a bending angle is arranged in the enclosed by the C-shaped beam cross-section interior of the bending beam, with a bent on a reference plane bending angle can be measured at one of the bending tools workpiece portion. It is characteristic that the angle measuring system comprises a first angle measuring unit, which is arranged below the median plane and has a first measuring range, which lies predominantly above the median plane, and a second angle measuring unit, which is arranged above the median plane and has a second measuring range which lies predominantly below the median plane.
    By this division of the possible measuring range of the angle measuring system in at least two measuring ranges, the applicability of the bending angle measurement can be extended to a variety of workpiece geometries and based on improved accuracy of the bending angle produced can be achieved. The free space within the bending beam is thus better usable or there is greater flexibility in the positioning of the workpiece section to be measured with respect to the angle measuring units.
    In order to simplify the positioning of the bending beam with the angle measuring units relative to the workpiece section to be measured or the necessary
    It is advantageous if both the first measuring range and the second measuring range include the center plane between the bending tools. This results in a continuous total measuring range, wherein there is an overlap of the measuring ranges in the region of the center plane and, depending on the present workpiece geometry, the angle measuring unit which is more suitable for a bending angle measurement can be used.
    Reliable angle measurements at a simultaneously comparatively large detectable measuring range are possible if the angle measuring units each comprise a light section sensor with a line laser and an image acquisition unit which is spaced therefrom. The use of light section sensors in bending machines has already proven itself, in particular by a lower positioning effort than in tactile systems.
    A particularly large clearance for bent workpieces on which a bending angle is to be measured is achieved if the clear width between the angle measuring units corresponds to at least 75% of a tool spacing existing between the bending tools. For practical application, it is further advantageous if the angle measuring system is adjustable by means of a guide arrangement in the longitudinal direction of the bending beam, in particular beyond one end of the bending tools is adjustable. As a result, in the case of long workpieces, it is possible to carry out a plurality of measurements at different positions along the workpiece, which makes it possible to determine the re-bending process in an optimum manner in order to achieve a precise bending angle. Furthermore, the bending clearance can be further increased by the lateral extension of the angle measuring system, with workpieces that protrude into this additional space can no longer be measured.
    A common drive and a common power and data line for both measuring units is possible if the angle measuring units are mounted on a common carriage. The structural complexity can be kept low.
    In order to ensure a more stable guidance of the carriage with higher measurement accuracy, this can be performed on two spaced apart guide rails on a distance from the bending tools base of the C-shaped beam cross-section.
    An advantageous embodiment may consist in that on the carriage on fleas of the lower bending tool a perpendicular to the median plane oriented stop surface is formed. This can be used as a reference stop for a workpiece, whereby e.g. the possibility of correcting gripping errors of a workpiece manipulator exists.
    One possibility for further increasing the bending angle accuracy based on the measured bending angles is to provide the bending beam with a crowning device for influencing the curvature along the longitudinal direction of a bending tool. A possible deformation of the Werkstückhaltevorrich-device and the bending beam itself can be at least partially corrected, as is already used in press brakes.
    The invention also relates to a known from the prior art folding machine, comprising a machine frame, connected to the machine frame workpiece holding unit with a first clamping tool and cooperating with this, adjustable second clamping tool for fixing a workpiece in a particular horizontal working plane, so that a projecting to be bent workpiece portion relative to the workpiece holding unit, and an adjustable frame mounted on the machine frame and connected to an adjustment bending beam for bending the workpiece portion, wherein the bending beam is formed according to one of claims 1 to 9.
    The invention further relates to a method for measuring a bending angle of a workpiece in a folding machine with an elongated bending beam, which has an approximately C-shaped beam cross-section and two with respect to a, preferably horizontal center plane opposite and facing each other in the longitudinal direction of the bending beam extending bending tools between where a workpiece portion to be bent portion of a workpiece is introduced and is measured by means of an arranged in the interior of the bending beam angle measuring system to be measured on a workpiece portion of the bending angle with respect to a reference plane. It is characteristic that, in particular after automatic determination by a programmable control device of the angle measuring system, the bending angle is measured at a workpiece section to be measured by means of a first arranged below the center plane angle measuring unit or by means of a second above the center plane arranged angle measuring unit or by means of first angle measuring unit and second angle measuring unit , The thus achievable advantageous effects have already been explained in the bending beam according to the invention.
    To further increase the angular measurement accuracy, the method can additionally be supplemented to the effect that the measurement of the bending angle takes place after removal of the bending tool from the workpiece and subsequent deactivation or reduction of the workpiece clamping by the workpiece holding device. As a result, the workpiece in the angle measurement is substantially free of forming forces and clamping forces and the state of a full springback can be assumed.
    The size of the measuring ranges of the angle measuring units makes it possible that the measurement of the bending angle optionally takes place on a workpiece section which has been formed by two or more preceding bending operations on the workpiece. The angle measurement is therefore not limited to an immediately previously bent workpiece section, but the evaluation of the angle measurement can be specifically directed to a workpiece section, in which the highest accuracy requirements exist. In a radius bend, which is composed of a plurality of successively performed partial bends, the measurement of the bending angle can be done on the straight section at the beginning of the workpiece.
    For larger workpieces with long bending edges, it is advantageous if, after a bending operation, the bending angle on the workpiece section is measured at a plurality of positions distanced from one another in the longitudinal direction of the bending beam. As a result, any fluctuations in the bending angle in the longitudinal direction of the bending beam can be detected and corrected if necessary.
    Very accurate bending angles, in which also possible deformations of the pivoting bending machine can be taken into account, are based on the measurements after a preceding bending operation, a subsequent bending operation is adapted, in particular a curvature along the longitudinal direction of a bending tool before or during the subsequent bending process actively influenced is, for example by means of a crowning device.
    For a better understanding of the invention, this will be explained in more detail with reference to the following figures.
    In each case, in a highly simplified, schematic representation:
    1 shows a section through a bending beam of a folding machine with a non-contact bending angle measuring system.
    Fig. 2 is a view of a bending beam in the direction II in Fig. 1;
    3 shows a section through a further embodiment of a bending beam according to the invention;
    4 shows a section through a bending beam along line IV-IV in Fig. 3.
    Fig. 5 is an illustration of the application of a bending beam kens invention and
    Fig. 6 further applications of a bending beam according to the invention.
    By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.
    Fig. 1 shows a section through a bending beam 1, a non-illustrated pivoting bending machine, as is known from the prior art. The bending beam 1 is elongated at right angles to the plane of the drawing and in this case has an approximately C-shaped beam cross-section 2, which is composed essentially of an approximately vertical direction extending base 3 and two other ends in the horizontal direction subsequent legs 4 and 5. At the free ends of the two legs 4 and 5, a lower first bending tool 6 and an upper second bending tool 7 are fixed, which are opposite to each other with respect to a median plane 8 of the bending beam 1 and facing each other. The bending tools 6, 7 may have an identical cross section or else have a different cross section as shown in FIG. To carry out a bending operation, a workpiece 9 can be inserted into the inside 10 of the bending beam 1 enclosed by the C-shaped beam cross section 2, and a part of the workpiece 9 remaining outside the C-shaped beam cross section is fixed by means of a workpiece holding device (see FIG. 3).
    A workpiece section 11 to be bent, which protrudes from the workpiece holding device, is bent downwards either by means of the first bending tool 6 or by means of the second bending tool 7, whereby a specific bending angle 13 on the workpiece 9 is effected with reference to a reference plane 12. If a workpiece section 11 is bent upward by means of a first working edge 14 formed on the first bending tool 6, this is also referred to as a positive bending, while in the case of downward bending by means of a second working edge 15 on the second bending tool 7, this is referred to as negative bending.
    The movements of the bending beam 1 required for carrying out bending operations relative to a fixed machine frame of the folding machine are effected by means of an adjusting drive 16, whereby both
    Stellbewegungen in the vertical Y-direction, as well as in the horizontal X-direction and combined movements are executable.
    The adjustment movements are advantageously controlled by means of a programmable control device of the folding machine, whereby a high repetition accuracy of the bending operations can be achieved. Since the achievable bending angle 13 on a curved workpiece portion 11, however, not only depends on the adjustment movement of the bending beam 1, but also of workpiece properties, such. B. workpiece thickness and workpiece strength, the achievable by a bending bending angle 13 is always subject to certain fluctuations. With high accuracy requirements on the achieved bending angle, it is therefore state of the art to apply a two-stage bending process, which is composed of pre-bending and post-bending or final bending. During pre-bending of the workpiece section 11 is bent to a pre-bending angle which is smaller than the desired Endbiegewinkel and after performing the Vorbiegens the forming behavior of the workpiece 9 is judged and bent during final bending of the bending section, taking into account the Umformverhaltens to the final bending angle.
    The most important factor for the bending angle accuracy is the individual springback of the workpiece section 11 during the relief after the bending process. If, for example, during a pre-bending to an angle of 80 ° with the unloaded workpiece 9, a springback to a bending angle of 77 ° is determined, this springback of 3 ° is taken into account in a subsequent post-bending or finish bending process in that, with a desired final bending angle of 90 ° ° In the unloaded state during the bend, an angle of 93 ° is used to compensate for the expected springback of 3 °.
    In order to be able to use such a two-stage bending process, the bending beam 1 has an angle measuring system 17 in the interior 10. When bending beam 1 according to the invention, the non-contact angle measuring system 17 comprises a first angle measuring unit 18 which is disposed below the median plane 8 and oriented upward and further comprises a second angle measuring unit 19, which is arranged above the median plane 8 and oriented downwards. The first measuring range 20 detectable by the first angle measuring unit 18 is shown in dashed lines in FIG. 1 and lies predominantly above the center plane 8. The second measuring range 21 detectable by the second angle measuring unit 19 is shown in FIG. 1 with dash-dotted lines and lies for the most part below the median plane. 8
    In this arrangement, the angle measuring units 18, 19 are bent in positive bends upwardly bent workpiece sections 11 mainly from the upwardly oriented first, arranged below the central plane 8 angle measuring unit 18 and are bent in negative bending downwardly bent workpiece sections 11 mainly with the downwardly oriented second, measured above the center plane 8 arranged angle measuring unit 19.
    The entire measuring range that can be detected by the angle measuring system 17 is composed of the first measuring range 20 and the second measuring range 21 and can thereby be detected by measuring a total of a comparatively large proportion of the interior 10 of the bending beam 1.
    It is advantageous if the first measuring range 20 and the second measuring range 21 overlap in the region of the median plane 8 between the bending tools 6 and 7, ie both measuring ranges 20, 21 also include the median plane 8 between the bending tools 6, 7. The inventive arrangement of the angle measuring units 18, 19 there is a great deal of flexibility with respect to the position of a workpiece section 11 to be measured, whereby an exact measurement of bending angles 13 can be made even with complicated workpiece geometries with multiple bending edges.
    The angle measuring units 18, 19 can advantageously each be designed as a light section sensor, which comprises a line laser 22 or another light source, which can emit a flat light fan, and furthermore a picture reading unit 23, e.g. a camera with suitable optics and an image sensor with sufficient resolution. Alternatively, however, other non-contact angle measuring systems can also be used, such as, for example, laser scanners or time-of-flight cameras.
    When using a light section sensor, the line laser 22 preferably emits laser light in a plane which is arranged at right angles to the bending edges to be produced, as a result of which clearly visible laser light segments are formed on the workpiece 11 to be measured. The image acquisition unit 23, which is distant from the line laser 22, looks at these laser light segments from the side and can triangulate from the acquired images of the laser light segments the respective bending angle of the considered laser light segment relative to a reference plane. The measuring range of such a light section sensor results from the sectional area between the plane of the line laser and the detection area determined by the imaging optics and the image sensor of the image acquisition unit 23. The measuring regions 20, 21 represented in a simplified rectangular manner in FIG. 1 can therefore also have different shapes.
    FIG. 2 shows a view in the direction II according to FIG. 1 of another possible embodiment of a bending beam 1. In this embodiment, the base 3 of the beam cross-section 2 in the Z-direction, ie the longitudinal direction 24 of the bending beam 1, has a greater length than the bending tools 6, 7, and the angle measuring units 18 and 19 by means of a guide assembly 25 in the longitudinal direction 24 of the bending beam 1 be adjustable. As a result, in the case of long workpieces 9, in which bending angle fluctuations can occur along the bending edge length, measurements of the bending angle 13 can also be carried out at a plurality of positions. In Fig. 2, the angle measuring units 18 and 19 are mounted on guide rails 26 and can be positioned by means of an adjusting drive, not shown, along the Z-direction of the bending beam 1 of the programmable control device of the angle measuring system 17 at different locations.
    In Fig. 2 is shown with dashed lines a center position of the second angle measuring unit 19 during a bending angle measurement of a downwardly bent workpiece portion 11, wherein the measuring plane of the line laser 22 and the
    Detection area of the laterally arranged image detection unit 23 are also indicated by dashed lines.
    Since the angle measuring units 18, 19 in the interior 10 of the bending beam 1 represent a disturbing contour that can hinder the machining of certain workpiece geometries, it may be advantageous if the angle measuring units 18, 19 by means of the guide assembly 25 beyond the front ends of the bending tools 6, 7 to Side can be adjusted, since a greater bending space in the interior 10 of the bending beam 1 is provided. The first angle measuring unit 18 and the second angle measuring unit 19 may be independently adjustable as indicated in solid lines in FIG. 2, but it is also possible for the angle measuring units 18, 19 to be indicated by dashed lines in FIG. are mounted on a common carriage 27. In this case, a common adjustment for the common carriage 27 for adjusting the two angle measuring units 18, 19 sufficient. Such a carriage 27 may be guided on a single guide rail 26, but advantageously on two guide rails 26, whereby a high mechanical stability of the carriage 27 and thus also the angle measuring units 18, 19 is achieved.
    Since the space requirement of the angle measuring system 17 also limits the maximum dimensions of the workpieces suitable for measuring the bending angle, it is advantageous if, as shown in FIG. 1, the inside width 28 between the two angle measuring units 18 and 19 is approximately equal to the tool distance 29. but at least 75% of the tool spacing 29, corresponds, and thereby also workpiece portions 11 before the bending process can protrude between the angle measuring units 18 and 19.
    Fig. 3 shows a section through a further embodiment of a bending beam 1 and the implementation of a bending angle measurement. To the left of the bending beam 1, the workpiece holding device 30 is simplified, with which a workpiece 9 for performing a bending operation is fixed so that a relation to the Werkstückhaiteeinrichtung 30 projecting workpiece portion 11 by means of the first bending tool 6 upwards or by means of the second bending tool 7 are bent downwards can. The workpiece holding device 30 of the
    For this purpose, a folding machine comprises a first clamping tool 31 and an adjustable second clamping tool 32 cooperating therewith, between which a workpiece 9 can be clamped. In general, the lower first clamping tool 31 is designed to be fixed and forms its upper-side clamping surface a fixed working plane, which can serve for the measurement of the bending angle 13 as a reference surface 12.
    The workpiece section 11 shown in FIG. 3 and bent upward in a preceding bending operation is now measured by the angle measuring system 17 in the following manner. The bending beam 1 is moved by means of its adjusting drive 16 (see FIG. 1) into a position in which the workpiece section 11 to be measured lies within the first measuring range 20 of the first angle measuring unit 18. Subsequently, the angle measuring unit 18 in the longitudinal direction of the bending beam 1, ie in the direction of the Z-axis in the desired measuring position, which is defined by the plane of the line laser 22, driven. The objects illuminated by the line laser 22 result in a juxtaposition of laser light segments which are detected by the image acquisition unit 23 which is spaced apart in the Z direction. By means of an image evaluation method known from the prior art, the laser light segment formed on the workpiece section 11 to be measured is now identified and is determined by triangulation from its angular orientation in the captured image to the actual angular orientation in space and thereby also to the achieved bending angle 13 recalculated. In FIG. 3, the evaluation range 33 relevant for the bending angle measurement is shown hatched.
    The respective determined bending angle 13 can now be used to subsequent bending operations on the same workpiece 9 are performed such that the forming behavior of the workpiece 9, in particular the springback is taken into account and thus more accurate bending angle 13 can be achieved. Furthermore, the measured bending angle can be used in the course of the previously described two-stage bending process for final bending of the same bending edge, or the deformation behavior determined on a first workpiece 9 can be transferred to other equivalent workpieces 9 without having to perform a separate bending angle measurement for them.
    The angle measuring units 18 and 19 are, as already described with reference to FIG. 2, attached to a common carriage 27, which is guided in the longitudinal direction 24 of the bending beam 1 adjustable on two rails 26.
    At this carriage 27 may optionally be formed a stop element which forms a perpendicular to the median plane 8 oriented stop surface 34. This stop surface 34 can be brought by adjustment of the bending beam 1 at the level of the bearing surface of the first clamping element 31 and thereby produced during insertion of a workpiece 9, a defined starting position of the workpiece 9 for subsequent positioning movements, e.g. be executed by means of a programmable manipulator.
    4 shows a simplified plan view of a bending beam 1 cut along a line IV-IV in FIG. 3.
    The first angle measuring unit 18 is located approximately in a middle position with respect to the longitudinal direction 34 of the bending beam 1 and is represented by a dashed line of the measuring range 20 or 21 emanating from the line laser 22, in which a measurement of a bending angle 13 takes place. On the left and right of the workpiece 9 further possible measuring positions are indicated by dashed lines, whereby fluctuations in the bending angle 13 along a bending edge can be determined. This can arise, in particular, in that deviations from the straight ideal shape occur on the retaining device 30 or also on the bending beam 1 as a result of the forming forces that occur. In Fig. 4, such a curvature 35 of the workpiece holding device 30 is indicated by a dotted line. Since with such a curvature of the Werkstückhaiteeinrichtung 30 along the bending edge different bending angles 13 arise, it is advantageous if a bowing device on the bending beam 1 at the respective bending tool 6 and 7, a same direction curvature 36 can be effected, as they also in an exaggerated view a dashed line on the bending tool 6 is shown. Such an optional crowning device 37 is shown in FIG. 3 at the lower first bending tool 6. Such a crowning device 37 can for example cause an active deformation of the bending tool 6 in the central region to the outside or alternatively or additionally increase the compliance at the ends of the bending tool 6, whereby also a convex shape of the bending tool 6 can be effected. Such crowning 37 are based z. B. on the use of sliding wedge surfaces and are known in particular from the field of press brakes and reference is made in this respect known from the prior art embodiments of such crowning 37. Alternatively or additionally, such a crowning device 37 may also be provided for the upper second bending tool 7. In FIG. 4, curvatures are shown in the X-Z plane, however, alternatively or additionally, curvatures in the Y-Z plane can be correctable.
    4 further shows that optionally a second carriage 38 can be provided, on which an additional stop surface 34 for a workpiece 9 can be formed by means of a suitable stop element. Such an additional carriage 38 can also be designed as a basis for later additions with additional angle measuring units.
    In Fig. 5, the flexibility of the angle measuring system 17 of a bending beam 1 according to the invention is shown in a further application example. An upwardly bent workpiece portion 11 is generally measured with the first angle measuring unit 18 oriented upwardly, and a downwardly bent workpiece portion 11 shown by dashed lines is measured with the upper second angle measuring unit 19. However, it is also possible by appropriate adjustment of the bending beam 1 in the Y direction upwards to shift the measuring range 21 of the second angle measuring unit 19 upwards, whereby the upwardly bent workpiece portion 11 in the raised measuring range 21 (shown with dashed lines) are spent can. This selection option, whether a bending angle measurement is carried out with the first angle measuring unit 18 oriented from bottom to top or with the second angle measuring unit 19 oriented from top to bottom, allows additional freedom in the possible measurable geometry of the workpieces 9.
    The selection of the angle measuring unit 18, 19 to be used in each case or the suitable positioning of the bending beam 1 and / or the workpiece 9 for carrying out bending angle measurements can advantageously also be carried out by a programmable control device of the folding machine.
    FIG. 6 schematically illustrates another possible use of the angle measuring system 17 of a bending beam according to the invention. In this case, dashed lines show an evaluation region 33 located within the measuring region 20 (see FIGS. 1 and 3) and selected in the image evaluation of the angle measuring system 17, which is directed onto a workpiece section 11 which originated from an immediately preceding bending process is. However, it is also possible to align the evaluation region 33 with a workpiece section 39, which has been produced by two or more preceding bending processes on the workpiece 9. Such an evaluation region 33 is indicated in FIG. 6 by dotted lines and in this case is measured by the first angle measuring unit 18 of the bending angle 13 of the vertically upwardly projecting bending element. Thus, by suitable selection of the respective evaluation region 33, the bending accuracy can be optimized especially in that workpiece section which has the highest angular accuracy requirements. If, for example, the straight end section of a bending tooth, which adjoins the remainder of a workpiece 9 with a bending radius, has an exact bending angle 13, then the previously described stepwise pre-bending and subsequent finish bending can be applied specifically to this workpiece section, by the evaluation area 33 on this workpiece section 39 is laid.
    In the course of the image evaluation it is also possible to detect a sequence of several detected laser light segments as a whole and to compare the actual profile of a workpiece calculated therefrom with a desired profile, e.g. for controlling a radius bend composed of a plurality of individual bends.
    For the exact implementation of bending angle measurements, it may also be advantageous to cancel the clamping of the workpiece 9 at least partially or completely before performing the angle measurement, whereby not only the springback by canceling the forming force by removing the bending tool 6, 7 is effective, but also due the springback in the workpiece holding device can be free of existing angular changes that could distort the measured bending angle 13.
    The above-described method steps of the bending angle measurement as well as the other sequence steps in the bending operations are advantageously also carried out or triggered automatically by a programmable control device of a pivoting bending machine.
    The embodiments show possible embodiments, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are mutually possible and this variation possibility due to the teaching of technical action by representational invention in Can the expert working in this technical field.
    The scope of protection is determined by the claims. However, the description and drawings are to be considered to interpret the claims. Individual features or combinations of features from the illustrated and described different embodiments may represent for themselves inventive solutions. The task underlying the independent inventive solutions can be taken from the description. All statements of value ranges in the present description should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all sub-areas begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.
    For the sake of order, it should finally be pointed out that for a better understanding of the construction, elements have been shown partially unevenly and / or enlarged and / or reduced in size.
    LIST OF REFERENCE NUMERALS 1 bending beam 31 first clamping tool 2 beam cross section 32 second clamping tool 3 base 33 evaluation range 4 leg 34 stop surface 5 leg 35 curvature 6 first bending tool 36 curvature 7 second bending tool 37 crowning device 8 center plane 38 carriage 9 workpiece 39 workpiece section 10 interior 11 workpiece section 12 reference plane 13 bending angle 14 first working edge 15 second working edge 16 adjusting drive 17 angle measuring system 18 first angle measuring unit 19 second angle measuring unit 20 first measuring range 21 second measuring range 22 line laser 23 image acquisition unit 24 longitudinal direction 25 guide arrangement 26 guide rail 27 carriage 28 clear width 29 tool distance 30 workpiece holder device
    权利要求:
    Claims (15)
    [1]
    claims
    1. bending beam (1) for a folding machine, wherein the elongate bending beam (1) has an approximately C-shaped beam cross-section (2) and two with respect to a, preferably horizontal center plane (8) opposite and facing each other in the longitudinal direction (24) of the bending beam (1 ) extending bending tools (6, 7), between which a workpiece portion to be bent (11) of a workpiece (9) is insertable and wherein in the C-shaped beam cross section (2) enclosed inside (10) of the bending beam (1) an angle measuring system (17) for contactless measurement of a bending angle (13) is arranged, with which on one of the bending tools (6, 7) bent workpiece portion (11) on a reference plane (12) related bending angle (13) is measurable, characterized in that the angle measuring system (17) comprises a first angle measuring unit (18), which is arranged below the center plane (8) and has a first measuring area (20), which for the most part Part above the median plane (8), and a second angle measuring unit (19) comprises, which is arranged above the median plane (8) and a second measuring area (21), which lies for the most part below the median plane (8).
    [2]
    2. bending beam (1) according to claim 1, characterized in that both the first measuring range (20) and the second measuring range (21) includes the center plane (8) between the bending tools (6, 7).
    [3]
    3. bending beam (1) according to claim 1 or 2, characterized in that the angle measuring units (18, 19) each comprise a light section sensor with a line laser (22) and a distance to this image detection unit (23).
    [4]
    4. bending beam (1) according to one of claims 1 to 3, characterized in that the clear width (28) between the angle measuring units (18, 19) at least 75% of a between the bending tools (6, 7) existing tool spacing (29) ,
    [5]
    5. bending beam (1) according to one of claims 1 to 4, characterized in that the angle measuring units (18, 19) by means of a guide arrangement (25) in the longitudinal direction (24) of the bending beam (1) are adjustable, in particular over one end of the bending tools (6, 7) are adjustable out.
    [6]
    6. bending beam (1) according to claim 5, characterized in that the angle measuring units (18, 19) on a common carriage (27) are attached.
    [7]
    7. bending beam (1) according to claim 6, characterized in that the carriage (27) on two mutually distanced guide rails (26) on one of the bending tools (6, 7) distant base (3) of the bending beam (1) is guided.
    [8]
    8. bending beam (1) according to claim 6 or 7, characterized in that on the carriage (27) at the level of the lower bending tool (6) perpendicular to the median plane (8) perpendicularly oriented stop surface (34) is formed.
    [9]
    9. bending beam (1) according to one of claims 1 to 8, characterized in that on the bending beam (1) a crowning device (37) for influencing the curvature (36) along the longitudinal direction (24) of a bending tool (6, 7) is formed ,
    [10]
    10. A pivoting bending machine, comprising a machine frame, a workpiece holding unit (30) connected to the machine frame with a first clamping tool (31) and an interacting, adjustable second clamping tool (32) for fixing a workpiece (9) in one, in particular horizontal, Working plane, so that a workpiece section to be bent (11) projects relative to the workpiece holding unit (30), and an adjustable mounted on the machine frame and with an adjustment (16) bending beam (1) for bending the workpiece section (11), characterized in that Bending beam (1) according to one of claims 1 to 9 is formed.
    [11]
    11. A method for measuring a bending angle (13) on a workpiece (9) in a folding machine with an elongated bending beam (1), said one approximately C-shaped beam cross-section (2) and two with respect to a, preferably horizontal center plane (8) opposite and facing each other in the longitudinal direction (24) of the bending beam (1) extending bending tools (6, 7) between which a workpiece portion to be bent (11) of a workpiece (9) is inserted and by means of a in the C-shaped beam cross section (2 ) enclosed inside (10) of the bending beam (1) arranged angle measuring system (17) on a workpiece to be measured portion (11) of the bending angle (13) with respect to a reference plane (12) is measured, characterized in that, in particular after automatic determination by a programmable control device of the angle measuring system (17), the bending angle (13) of a workpiece section (11) by means of a first below the mid-plane (8) arranged angle measuring unit (18) or by means of a second above the center plane (8) arranged angle measuring unit (19) or by means of first angle measuring unit (18) and second angle measuring unit (19) is measured.
    [12]
    12. The method according to claim 11, characterized in that the measurement of the bending angle (13) after removal of the bending tool (6, 7) from the workpiece (9) and subsequent deactivation or reduction of the workpiece clamping of a Werkstückhaiteeinrichtung (30).
    [13]
    13. The method according to claim 11 or 12, characterized in that the measurement of the bending angle (13) on a workpiece portion (39), which is caused by two or more preceding bending operations on the workpiece (9).
    [14]
    14. The method according to any one of claims 11 to 13, characterized in that after a bending operation of the bending angle (13) on the bent workpiece portion (11) at a plurality in the longitudinal direction (24) of the bending beam (1) spaced apart positions measured.
    [15]
    15. The method according to claim 14, characterized in that based on the measurements after a previous bending operation, a subsequent bending operation is adapted, in particular a curvature (36) of a bending tool (6, 7) along its longitudinal direction (24) before or during the subsequent bending process is actively influenced.
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    同族专利:
    公开号 | 公开日
    EP3445510B1|2020-08-26|
    EP3445510A1|2019-02-27|
    WO2017181208A1|2017-10-26|
    CN109153057A|2019-01-04|
    US20190126335A1|2019-05-02|
    JP2019518607A|2019-07-04|
    AT518560B1|2018-01-15|
    CN109153057B|2020-07-03|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50347/2016A|AT518560B1|2016-04-18|2016-04-18|Bending beam for a folding machine|ATA50347/2016A| AT518560B1|2016-04-18|2016-04-18|Bending beam for a folding machine|
    CN201780031325.8A| CN109153057B|2016-04-18|2017-04-18|Bending beam for a rotary bending machine|
    US16/094,242| US20190126335A1|2016-04-18|2017-04-18|Bending beam for a swivel bending machine|
    JP2018554726A| JP2019518607A|2016-04-18|2017-04-18|Bending beam for pivoting bending machines|
    PCT/AT2017/060096| WO2017181208A1|2016-04-18|2017-04-18|Bending beam for a swivel bending machine|
    EP17728039.3A| EP3445510B1|2016-04-18|2017-04-18|Bending beam for a swivel bending machine|
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