• 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 production plant (1) for bending sheet metal, comprising a bending press (3) with pressing bars (13, 16), a bending tool (4), a tool manipulation unit (30) for the bending tool (4) and a protective unit (29 ) with a protective element (32) and an adjusting device (33, 44). The protective element (32) of the protective unit (29) can be displaced from a protective position covering the bending tool (4) into a release position which releases the bending tool (4). The adjusting device (33) comprises at least two linear guide arrangements (45) each having a plurality of guide rails (46, 47, 48), by means of which the protective element (32) is displaceable between the two positions.
    公开号:AT520038A1
    申请号:T50072/2018
    申请日:2017-03-06
    公开日:2018-12-15
    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 manufacturing plant, in particular for the free bending of sheet metal to be produced workpieces, with a protective unit, which comprises at least one protective element and this particular needs for Abde bridges of its bending tool during tool change.
    US 3,186,256 A describes a bending machine for the production of workpieces or workpieces between at least one relatively adjustable bending tool. The bending tool comprises a bending punch and a bending die, which are respectively held on a pressing beam. One of the press beams is performed to perform the bending operation on a machine frame in the vertical direction adjustable. On the operator side and thus on that side from which the sheet to be bent is fed, the bending tool is preceded by a plate-shaped protective element. For attachment of the protective element, a holding rod is provided, which is attached to the side of the press beam located side cheeks of the machine frame. The support rod is disposed above the protective element and carries a plurality of adjusting elements, which are connected for vertical displacement of the protective element with this. The Verstellhub the adjusting elements between the protective position and the release position is limited by the relatively short travel of the trained as Elektomagneten control elements. The vertical adjustment of the protective element is used for the
    Bending process hochschwenkenden portion of the workpiece to be produced no interference contour. Furthermore, it can not be created in all operating cases sufficient clearance before the bending tool.
    Another embodiment of a protective element for a bending machine for the manufacture of workpieces or workpieces between at least one relatively adjustable bending tool has become known from US 3,969,955 A. The bending tool comprises a bending punch and a bending die, which are respectively held on a pressing beam. One of the press bars is for
    Implementation of the bending process on a machine frame in the vertical direction rich adjustable. The plate-shaped protective element is held on the upper adjustable pressing beam via at least two mutually distanced arranged hinge assembly each on a flat profile with a slot arranged therein. The flat profiles can be adjusted relative to the upper press beam by the provision of each disposed therein slots in the vertical direction. In addition, if necessary, the protective element can be swiveled forward or also folded up by means of the hinge arrangement in the direction of the operator side. Here only a small vertical adjustment stroke could be achieved. Even when the protective element was folded up, sufficient free space could not be created without the formation of a disturbing contour.
    A further embodiment of a protective element for a bending machine is described in US Pat. No. 4,030,364 A. The upper pressing beam is adjustable relative to the stationary machine frame in the vertical direction. The plate-shaped protective element is held in its lowermost position by means of tethers at a fixed above the upper press beam support member of the machine frame. In this lowermost position of the protective element, a low in his height formed supply gap for the sheet to be bent is present. By means of a multiply deflected cable, the protective element can be raised during the downward movement of the upper press beam in the course of the bending process. One end of the rope of the cable is firmly connected to the protective element and the other end to the pressing beam. A twofold deflection of the rope of the cable takes place on the support element, wherein further takes place between the two provided deflection on the rear side of the upper press beam. As the upper beam moves toward the lower beam, the cable pull causes the guard to move relative to the lower beam
    Press bar raised, which increases the previously low feed gap in height. It is disadvantageous that an adjustment of the protective element is only possible with an adjustment of the upper press beam and the adjustment of the protective element is dependent on the Verstellhub the upper press beam. In addition, the cable arrangement is complex and not always reliable in operation.
    JPH 11-300421 describes a further embodiment of a protective device with a plate-shaped protective element for a bending machine. In the area of fixed side cheeks of the machine frame a cable for height adjustment of the protective element is provided in each case. Each of the cables extends from the protective element in the vertical direction to a first guide roller, from this to a located in the rear side of the side cheeks second guide roller and from this to a voltage formed by a cylinder Kolbenanord actuator. The possible adjustment path of the protective element is determined by the adjustment stroke of the adjusting elements. The disadvantage here is the labile arrangement of the protective element in all its positions.
    Another, adjustable in the vertical direction of a system protection device is known from JPH 06-34736 U. In the region of both longitudinal ends of the protective device, a driven roller is arranged above each one. To each of the rollers a pull rope is wound, wherein in each case a first end of the pull rope is connected to the protective device and a respective second end with a counterweight. By applied to the two rollers drive torque and by means of support of the counterweight, the protection device can be easily adjusted in the vertical direction from its protective position to the release position. For this purpose, several system components are provided for the adjusting mechanism, wherein due to the cable a labile Anord tion of the support element is present and further Störconturen be created.
    Object of the present invention was to overcome the disadvantages of the prior Tech technology and to provide a device by means of which it is possible to allow a safe and easy coverage of the danger zone when changing tools and in the release position of the protective element no interference contour form the implementation of the bending process.
    This object is achieved by a manufacturing plant, in particular with the protective unit provided for this purpose, according to the claims.
    The production plant according to the invention can serve in particular for the free bending or embossing bending of a workpiece to be produced from a sheet metal, and comprise the following plant components: a bending press, in particular a press brake, with a machine frame, a lower pressing beam, an upper pressing beam and arranged on the pressing beam or trained tool holders, at least one bending tool with at least one bending punch and at least one bending die, a tool manipulation unit for moving the bending tool between the tool holders and a tool storage or for changing the position of the bending tool relative to the tool holders, a protection unit with at least one protective element and one Adjusting device, by means of which adjusting the at least one protective element relative to the bending press of a bending tool at least be richly covering protective position in a d at least partially releasing release position is displaceable, and the at least one protective element is plate-shaped and has a first longitudinal edge and a second longitudinal edge and of the two longitudinal edges a width of the protective element is defined, and wherein the protection unit is arranged in a supply region in front of the bending press in which - either the adjusting device comprises at least two brackets and at least two retaining arms each having a first end portion and a second Endbe rich, and the retaining arms each with their first end portions of the
    Brackets are articulated and the support arms are each connected at its second end portions with the at least one protective element at its first longitudinally facing away from the first beam first edge, and the at least two consoles in the direction of the longitudinal extension of the at least one protective element are arranged spaced apart, - or Adjustment comprises at least two linear guide assemblies, and each of the linear guide assemblies comprises a first guide rail and a second guide rail and at least one further guide rail, and the first guide rails are each fixedly arranged on the bending press, and in each case at least one further guide rail is attached to at least one protective element, and the at least two linear guide assemblies are spaced from each other in the direction of the longitudinal extent of the at least one Schutzele management.
    The advantage achieved thereby lies in the fact that, depending on the choice of the adjusting device, a sufficiently long adjustment for the at least one protective element between its protective position and its release position is provided. This can be achieved convincing for the protective position a secure cover in the front area between the open press beams with the bending work arranged thereon. If the at least one protective element adjusted in its release position, this is due to the sufficiently long selected adjustment path adjusted so far from the bending tool held on the pressing beam that the protective element no interference contour is formed for the implementation of bending operations.
    By providing the brackets as a bearing base and the retaining arms or lever arms held pivotally thereon, an adjustment path defined by the longitudinal extent of the retaining arms can thus be provided when the protective element is pivoted up from the protective position into the release position, with which the at least one protective element can be moved away from the working area , Furthermore, a still preferably in all operating positions hanging arrangement of the at least one protective element can be achieved on the respective support arms.
    Also in the further possible embodiment of the adjustment device in the form of
    Linear guide assemblies comprising a plurality of guide rails, so a space-saving adjustment can be created in which a rectilinear adjustment, in particular by means of a telescopic guide, made light. By providing a plurality of guide rails so starting from the release position in the protective position and back also a sufficiently long adjustment can be created, so in turn on the one hand si chere coverage of the bending tool when changing tools and on the other hand no interference contour in the release position located protection element during the bending process.
    Another possible embodiment provides that the protection unit, in particular its consoles or their first guide rails, is held on the upper pressing beam. As a result of the fact that the entire protection unit is held along on the upper pressing beam, the entire protection unit is always moved and the relative distance in the release position between the upper pressing beam and the protection unit, in particular the protective element, is kept the same. Once the relative position has been determined in the release position, no further interfering contour is created during subsequent bending processes.
    Furthermore, it may be advantageous if the width of the at least one Schutzele management between its two longitudinal edges of an opening width between the
    Tool holders corresponds with completely open bending tool. This allows a safe coverage of the danger area can be achieved during the tool change. Furthermore, but also the height or width of the protective element can be kept as low as possible.
    Another embodiment is characterized in that the at least two retaining arms between the protective position and the release position of the at least one protective element in each case by a pivot angle with a value selected from an angular range with a lower limit of 150 ° and an upper limit of 200 °, in particular 180 °, are pivotable. By providing a sufficiently large pivoting angle of the retaining arms, on the one hand, a space-saving arrangement of the adjusting device can be created both in the protective position and in the release position and, on the other hand, the distancing of the protective element from the bending region in the release position can be achieved as far as possible.
    Another possible embodiment has the features that a longitudinal extension of the holding arms respectively corresponds approximately to the width of the at least one protective element between its two longitudinal edges. Thus, even with minimal widths of the protective element, a sufficient adjustment can be achieved while still creating a compact unit.
    A further embodiment provides that the support arms in the release position depending Weil starting from the consoles on the abgewen from the lower press beam dete page protrude and the at least one protective element on the top
    Press beam averted side of the support arms and in the direction of the Unte ren clamping bar is arranged hanging. As a result of the swung-up holding arms and the arrangement of the at least one protective element suspended therefrom, a space-saving arrangement of the protective unit in the swung-up release position can be achieved.
    Another embodiment is characterized in that in the protection Stel development both the support arms starting from the consoles and the at least one hinged to the support arms protective element have a hanging in the direction of the lower pressing beam arrangement Thus, a change in position of the protective element between its release position and his
    Protective position can be achieved by twice the longitudinal extension of the support arms.
    A further preferred embodiment is characterized in that the
    Consoles are arranged on the upper press beam, that in the protective position and fully open bending tool, the second longitudinal edge of the at least one protective element is the lower pressing beam facing, and extending at least one protective element with its second longitudinal edge at least up to the lower tool holder. This can be achieved on the one hand in the protective position a secure cover even when the bending tool is open and on the other hand, a sufficiently wide distancing in the release position.
    Furthermore, it may be advantageous if the at least two brackets are arranged in an upper end portion of the upper press beam. Upper end section or end section of the press beam is understood to mean that the brackets are arranged in the region which is further distanced from the lower press beam. This creates the possibility of arranging the at least one protective element in its release position at a rather large distance from the bending tool. Thus, the interference contour formed by the protective element can be arranged very far away from the bending region of the sheet. Furthermore, sufficient free space is thus also formed on the operating side or supply side without restriction by the protective element.
    Another alternative embodiment is characterized in that at least one adjusting and / or damping device is provided, which at least one actuating and / or damping device is operatively connected to one of the retaining arms. By providing at least one adjusting and / or damping device so a controlled pivoting movement of the or the support arms can be achieved. In addition, but also a relief of the return movement of the protective position can be achieved in the release position in a manual adjustment by the operator. By means of the adjusting device but also a weight balance and an associated weight compensation can be achieved. By the damping device, the downward movement of the or the support arms can be delayed from the upwardly projecting to the downwardly projecting position. This allows a controlled downward movement of the
    Retaining arms are achieved together with the protective element held thereon.
    A further embodiment provides that a maximum adjustment of the at least two linear guide assemblies is selected such that in the protective position and fully open bending tool, the second longitudinal edge of at least one protective element is the lower pressing beam facing, and the at least one protective element with its second Longitudinal edge extends at least up to the lower tool holder. By selecting the maximum adjustment travel, a precisely predefined operating state of the protection unit can be achieved in each of its positions. Furthermore, but also in the protective position, a secure cover can be ensured, in the release position by the multiple provision of the guide rails, the protective element can be moved far enough away from the bending area of the bending tool and so no interference contour is formed from this.
    Another possible and optionally alternative embodiment has the
    Characteristics that the at least two linear guide assemblies are held in vertical alignment on the upper pressing beam. As a result, an exact rectilinear adjusting movement between the protective position and the release position can be achieved. Due to the constant Mitbewegen the entire protection unit with the upper beam, the relative distance in the release position between tween the upper beam and the protection unit, in particular the Schut zelement, always be kept the same. Once the relative position has been determined in the release position, no further interfering contour is created during subsequent bending processes.
    Another embodiment is characterized in that at least egg ner of the linear guide assemblies at least one drive element is provided. By providing at least one drive element, a controlled adjusting movement can be achieved during the adjustment process from the release position to the protective position and / or from the protective position to the release position.
    A further preferred embodiment is characterized in that one of the drive elements is provided between the first guide rail and the second guide rail. As a result, an exactly predetermined adjusting movement between the first two guide rails can be achieved.
    Furthermore, it may be advantageous if one of the drive elements is provided between the second guide rail and the at least one further guide rail. Thus, a uniform adjustment between the guide rails can be ensured.
    Finally, another embodiment is characterized in that at least one adjusting and / or damping device is provided, which is at least one actuating and / or damping device with the at least one Schutzele element operatively connected. By providing at least one adjusting and / or damping device so a controlled pivoting movement of the or the support arms can be achieved. In addition, but also a relief of the return movement of the protective position can be achieved in the release position in a manual adjustment by the operator. By means of the adjusting device but also a weight balance and an associated weight compensation can be achieved. By the damping device, the downward movement of the or the support arms can be delayed from the upwardly projecting to the downwardly projecting position. Thus, a controlled downward movement of the holding arms can be achieved together with the protective element held thereon.
    For a better understanding of the invention, this is based on the following
    Figures explained in more detail.
    In each case, in a highly simplified, schematic representation:
    Fig. 1 shows a manufacturing plant with a bending press and schematically indicated protection unit, in front view;
    Fig. 2 shows the manufacturing plant of Figure 1, in side view.
    Fig. 3 shows a first possible training of the protection unit in the protection Stel ment, with indicated bending press, in front view and schematic representation;
    FIG. 4 shows the protective unit according to FIG. 3 in its protective position, in side view; FIG.
    Fig. 5, the protection unit of Figure 3, but in its release position, in th tenansicht.
    Fig. 6 shows another possible embodiment of the protection unit in its protective position, with indicated bending press, in front view and schematic representation;
    Fig. 7, the protection unit of FIG. 6 in plan view of the adjusting device.
    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, wherein 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.
    The term "in particular" is understood below to mean that it may be a more specific training or specification of an object or a method step, but not necessarily a mandatory, preferred embodiment thereof or a procedure must be.
    In Figs. 1 and 2, a manufacturing plant 1 is shown in a highly schematically simplified representation, which is formed in the present case, in particular for the free bending of sheet metal to be produced workpieces 2 by means of bending.
    The manufacturing plant 1 used for bending in the present case comprises a bending machine, in the present embodiment, a bending press 3, in particular a press brake or press brake, for producing the workpieces 2 or workpieces between at least one relatively adjustable bending tool 4. The bending tool 4 comprises in the present embodiment at least one bending punch 5, but usually a plurality of bending punch 5, and at least one bending die 6, but usually more cooperating bending dies 6. The at least one bending punch 5 is arranged above the workpiece to be manufactured 2 on the bending press 3 and held there, in particular clamped. Also, at least one bending die 6 is held on the bending press 3, in particular held clamped thereto.
    As a coordinate system in such bending presses 3 is basically referred to as "X" direction that runs in a horizontal plane and in a vertical orientation with respect to the longitudinal extension of the bending tool 4, in particular its punch 5 and bending die 6. Thus, this is the direction which also corresponds to the feed direction or the withdrawal direction. As "Y" direction, the vertical direction is understood, which thus extends in the height direction of the bending tool 4 and further in the vertical direction with respect to the horizontal plane. Finally, the "Z" direction is understood to be that direction which extends in the longitudinal direction or in the longitudinal extent of the bending tool 4, in particular its bending punch 5 and bending die 6. As a result, the longitudinal extent of the bending edge defined by the bending tool 4 in the "Z" direction is also aligned.
    A machine frame 7 of the bending press 3 comprises, for example, a base plate 8, on which are vertically upstanding, spaced apart in the transverse direction and parallel to each other side cheeks 9, 10 are arranged. These are preferably connected to each other by a solid, formed for example from a sheet metal part cross member 11 at their distance from the bottom plate 8 end portions.
    The side cheeks 9, 10 may be formed approximately C-shaped to form a free space for forming the workpiece 2, wherein on front end faces 12 of bottom flanges of the side cheeks 9, 10 a fixed, in particular on the bottom plate 8 aufstehender, first pressing bar 13 or lower Press bar 13 is attached. This fixedly arranged and fixed pressing beam 13 can also be referred to as a press table, on which parts of the bending tool 4 are arranged and also held. At front end faces 14 of the legs removed from the bottom plate 8 is in linear guides 15 to the table beam forming the pressing beam 13 relatively adjustable further
    Press beam 16, in particular a pressure bar, guided guided. The pressing beam 16 can also be referred to as a second pressing beam or upper pressing beam but also as a pressure beam.
    On opposite, mutually parallel end faces 17, 18 of the two pressing bars 13, 16 can be arranged 19 tool holders 19, 20 for assembly with the bending tools or. The bending tool or tools 4 may also be held with the interposition of an adapter, not shown, to the tool holders 19, 20, which is considered not favorable for a change process of individual components or the entire bending tool 4, but may also represent a possibility.
    The bending press 3 shown has as a drive assembly 21 for the adjustable
    Pressing bar 16, namely the pressure bar, e.g. two with electrical energy exaggerated drive means 22, which are line connected to a fed from a power grid 23 control device 24. By way of an input terminal 25 communicatively connected to the control device 24, for example, the operation of the bending press 3, in particular also the changing operation of the bending tool 4, can be controlled.
    The drive means 22 may be e.g. to act electromotive spindle drives 26, as they are well known, of which adjusting means 27 kens for a re versible adjusting movement of the pressure bar formed by the upper Pressbal 16 with this, for example, drivingly connected. Regardless of this, it would also be possible to form the drive means 22 by means of hydraulically and / or pneumatically actuatable actuating means. Cylinder piston arrangements can be used here. But it would also be other drive means, such as. Eccentric drives, toggle drives, rack drives, etc. conceivable.
    Further details required for the operation of such a bending press 3, such as, for example, feed devices and / or control devices, are omitted from the description in order to avoid an unnecessary length of the description.
    To support and support the sheet to be bent, a support table 28 can be provided or arranged in the front region -also the supply region-of the bending press. The support table 28 is only partially shown and forms a support plane for the sheet to be bent.
    Furthermore, the manufacturing plant 1 may also include a manipulator not shown here, which at least a piece of it takes from a supply stack of sheets to be deformed or abzukantenden and spends in the work area or the operating side of the bending press 3.
    The manipulator can in turn comprise a gripping tongs, which in turn has gripping fingers. The gripping fingers have clamping surfaces on the side facing the workpiece 2 to be produced. By a corresponding pivoting of the two gripping fingers against each other and the application of sufficient clamping force, the sheet metal or the workpiece 2 to be produced is held by the manipulator and moved accordingly positioned and positioned on the interaction of the clamping surfaces. With the gripper fingers of the gripping pliers, a corresponding gripping and, in a subsequent consequence due to the clamping movement, a sufficient hold for the workpiece 2 to be produced from the sheet metal is ensured.
    It is further indicated that in the area of the operating side or the feed side of the bending press 3 and thus, if necessary, before or the bending tools 4, a protective unit 29 may be arranged or provided. The protection unit 29 serves to cover the opening width between the tool holders 19, 20 with the bending tool 4 fully open in the area of the operating side or the feed side so that the operator is prevented from unintentionally accessing the tool holders and the bending tool 4 located there during the tool change. In this embodiment, the upper press beam 16 is adjustable relative to the lower press beam 13 for performing the bending operation. For tool change, the upper pressing bar 16 is further arranged at a distance from the lower pressing bar 13, as is well known.
    In most cases, the tool change takes place on the rear side of the pressing bars 13, 16 by means of a tool manipulation unit 30 indicated in a simplified manner.
    As a result, the operator can come very close to the front area of the bending press 3 and thus into the area of the bending tool 4, which may cause injury due to moving tool components or the tool manipulation unit 30 inadvertently. The Werkzeug-Manipulationsein unit 30 serves to bring the bending tool 4 between the Werkzeugauf 19, 20 and a tool memory 31 or the position change of the bending tool 4 relative to their position on the tool holders 19, 20th
    The protective unit 29 comprises at least one plate-shaped protective element 32. In most cases, this is made of a translucent or transparent material, in particular of a plastic. The protective element 32 is in the two Figs. 1 and 2 respectively directly upstream of the second or upper clamping bar 16, wherein this is shown in a so-called release position in both figures in dash-dotted lines. Furthermore, the protective element 32 is also shown in FIG. 1 in a so-called protective position in full lines. The detailed illustration of the holder, the storage and a possible adjustment mechanism of the same on the bending press 3, in particular on the second or upper pressing bar 16, is omitted here, wherein in the following FIGS. 3 to 5 and 6 and 7, some possible embodiments shown and be explained in more detail. The release position is understood here to mean that the protective element 32 allows free access to the bending tool 4 held on the pressing bars 13, 16.
    The protective position is given when the at least one protective element 32 at at least partially or even completely distanced from each other arranged bending punch 5 and Biegegesenk 6 an access starting from the
    As far as covering or safeguarding operating side or supply side, an operator can not reach between the open and spaced-apart pressing bars 13, 16 during a tool change of the bending tool 4. The tool change can preferably take place automatically, with this usually taking place in that region of the machine frame 7 located behind the operating side. The implementation of the tool change can e.g. by means of the tool manipulation unit 30, in particular a separate manipulator and / or a Hinteranschlageinheit, take place, as is well known.
    If the at least one protective element 32 is in its release position, in which the bending process or processes are usually carried out, then at least in the area of the bending tool 4 a sufficient manipulation space must be kept free of interference contours. An interference contour can be formed by a plant part or a machine component, which protrudes into the working space required for carrying out the bending process and thus reduces it and thus restricts it.
    The adjustment or displacement of the at least one protective element 32 can take place by means of an adjusting device 33 (not shown in detail in FIGS. 1 and 2). With this adjusting device 33, the at least one protective element 32 relative to the bending press 3 of the bending tool 4 at least partially, preferably completely covering the protective position in a bending tool 4 at least partially, preferably fully releasing release position to be shifted. The displacement can only be done manually or by means of a separate drive means.
    The plate-shaped protective element 32 has, arranged extending in the direction of its longitudinal extent, a first longitudinal edge 34 and a second longitudinal edge 35. The two longitudinal edges 34, 35 define a width 36 of the protective element 32. The width 36 may also be referred to as the transverse spacing, which is determined in the vertical direction with respect to the longitudinal edges 34, 35, which run mostly parallel to one another. The longitudinal extent of the protective element 32 is preferably selected such that it corresponds approximately to a longitudinal extension of the pressing bars 13, 16 or the tool holders 19, 20 arranged thereon. The protective unit 29, in particular the at least one protective element 32 and the adjusting device 33, is or are arranged in a supply region in front of the bending press 3. Thus, the arrangement is front side with respect to the bending press 3. In the possible embodiments described in more detail below, the protection unit 29 is held on the upper beam 16. Thus, the guard unit 29 is moved along with an adjustment of the upper press bar 16.
    FIGS. 3 to 5 show a first possible and optionally independent embodiment of the protective unit 29, wherein the same reference numerals or component designations are used for the same parts as in the preceding FIGS. 1 and 2. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 and 2 or reference.
    For better clarity, the two pressing bars 13, 16 are only partially indicated. The adjusting device 33 is further shown only simplified and stylized.
    The adjusting device 33 comprises at least two brackets 37 and preferably the same number of retaining arms 38 - in the present example also at least two retaining arms 38. The retaining arm 38 may also be referred to as a lever arm or swivel arm. Each of the holding arms 38 has a first end region 39 and a second end region 40 arranged at a distance from it in its longitudinal extent. Each of the consoles 37 is e.g. arranged on the machine frame 7 of the bending press 3, but in particular on the upper pressing beam 16 of the bending press 3, in particular fixedly connected to this, and arranged spaced apart in the direction of the longitudinal extension of the at least one protective element 32.
    Each of the support arms 38 is articulated with its first end portion 39 on one of the brackets 37, whereby a first bearing point is formed in each case. Furthermore, each of the retaining arms 38 with its second end portion 40 is pivotally connected to the at least one protective element 32 at the first longitudinal edge 34 facing away from the first pressing beam 13, whereby a second bearing point is formed in each case. By means of these articulated connections, on the one hand, the holding arms 38 can be pivoted about the respective bracket 37 and, on the other hand, the at least one protective element 32 can preferably be adjusted in an always hanging arrangement.
    The above-described width 36 of the at least one protective element 32 between its two longitudinal edges 34, 35 corresponds approximately to an opening width between the tool holders 19, 20 at fully open bending tool 4. Thus, at a maximum superscript position of the upper beam 16 always a secure cover of Space between the two
    Tool holders 19, 20 can be achieved.
    Due to the respective articulated mounting of the support arms 38 on the brackets 37, the retaining arms 38 together with the at least one protective element 32 can be displaced from the protective position of the protective element 32 into the release position of the protective element 32, in particular pivoted. The brackets 37 form parallel with respect to the longitudinal extent of the upper press beam 16 and aligned with each other aligned first pivot axes 41. The pivoting of each support arm 38 takes place in a vertically aligned with respect to the pivot axes 41 pivot plane. Thus, the at least two retaining arms 38 between the protective position and the release position of the at least one protective element 32 in each case by a pivot angle with a value selected from an angular range with a lower limit of 150 ° and an upper limit of 200 °, in particular 180 ° pivoted ,
    When located in the protective position protective element 32, the support arms 38 are preferably suspended and thus held perpendicular to the brackets 37 and protrude in the direction of the lower pressing beam 13. In the release position of the protective element 32, these protrude to the side facing away from the lower pressing bar 13 side up. The at least one protective element 32 is in the release position on the side facing away from the upper press beam 16 side of the support arms 38 and in
    Direction to the lower pressing beam 13 arranged hanging on the support arms 38.
    In the protective position, both the retaining arms 38 starting from the brackets 37 and the at least one protective element 32 hingedly connected to the retaining arms 38 have an arrangement hanging in the direction of the lower pressing beam 13. Under hanging is understood the gravitational situation.
    As described above, between each second end portion 39 of the holding arms 38 and the first longitudinal edge 34 of the protective element 32, a second bearing point with second pivot axes 42 is formed.
    Preferably, a longitudinal extension of the holding arms 38 between the two end regions 39, 40, in particular the respectively formed there pivot axes 41, 42, each approximately the width 36 of the at least one protective element 32 between its two longitudinal edges 34, 35. It could also be the longitudinal extent the retaining arms 38 are selected to be larger or smaller than the width 36.
    In order to create sufficient free space in the region of the bending tool without Störkontor, the brackets 37 are arranged on the upper pressing bar 16, that in the protective position and fully open bending tool 4, the second longitudinal edge 35 of the at least one protective element 32 is the lower pressing beam 13 is turned , The at least one protective element 32 with its second longitudinal edge 35 preferably extends at least as far as the lower tool holder 19. It has proven favorable if the at least two brackets 37 are arranged in an upper end section of the upper press beam 16.
    To facilitate the adjustment movement and / or the implementation of at least one schematically indicated adjusting and / or damping device 43 may be provided. In this case, the at least one adjusting and / or damping device 43 is preferably operatively connected to one of the holding arms 38. For attenuation and / or weight compensation, e.g. a torsion spring, a tension spring connected to a holding arm 38 and extending toward the upper press beam 16, or the like. Furthermore, at least one of the retaining arms 38 could be connected to a rotary drive for angular displacement. The adjusting device can be used in particular to balance the weight for the actuating movements to be performed between the protective position and the release position and vice versa. Thus, the actuator movements can be facilitated by force for the operator.
    FIGS. 6 and 7 show a further possible and possibly independent embodiment of the protective unit 29 for the bending machine or bending press 3, with the same reference numerals or component designations being used again for the same parts as in the preceding FIGS. 1 to 5 , To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 5 or reference. Again, a possible long adjustment path between the protective position and the release position for the at least one protective element 32 is to be achieved here again. Thus, on the one hand the risk for the operator can be greatly minimized that he can inadvertently access the tool to be changed or converted during bending tool 4 and on the other hand no interference contour in the bending tool and a large part of the upper press beam 16 is formed in the bending operation of the protective element 32 ,
    In this embodiment shown here, another possible embodiment of an adjustment device 44 for the protection unit 29 is shown, which is why a different reference to the previously described 33 is used to reference numerals. The basic adjustment path and the at least one protective element 32 can be designed analogously, as has been described above.
    Here, instead of the lever arrangements with the brackets 37 and the holding arms 38 for extending the adjustment path between the protective position and the release position of the protective element 32, a plurality of linear guide arrangements 45 are provided. The linear guide assemblies 45 may also be referred to as telescopic guides or telescopic guide assemblies. Each of the Linearfüh approximately 45 arrangements comprises a first guide rail 46, a second Füh guide rail 47 and at least one further guide rail 48. Depending on the length of the press beams 13, 16 and the at least one protective element 32 are at least two of the linear guide assemblies 45 per protection element 32 provided. Furthermore, the at least two linear guide arrangements 45 are arranged at a distance from one another in the direction of the longitudinal extent of the at least one protective element 32.
    But instead of the guide rails and telescopic cylinders could be used, which provide a sufficient stroke available.
    The first guide rails 46 are e.g. on the bending press 3, in particular the machine frame 7, but preferably in each case on the upper pressing bar 16, fixedly arranged, in particular attached thereto. The at least two linear guide assemblies 45 are further held in vertical alignment on the upper pressing bar 16. The at least one further guide rail 48 is in each case fixedly arranged on the at least one protective element 32, in particular attached thereto. The second guide rail 47 is provided immediately following the first guide rail 46, respectively. The guide rails are each guided to each other so as to perform a defined adjustment.
    In order to achieve a secure cover and protective position in the open position of the pressing bars 13, 16, a maximum adjustment path of the at least two linear guide arrangements 45 should be selected such that in the protective position and with completely open bending tool 4, the second longitudinal edge 35 of the at least one protective element 32 the lower pressing beam 13 is facing and extends the at least one protective element 32 with its second longitudinal edge 35 at least up to the lower tool holder 19.
    Furthermore, it may be advantageous if at least one of the Linearführungsan orders 45 at least one drive element 49 is provided. By the see before of at least one drive element 49, a controlled adjustment between at least one of the guide rails 46 and / or 47 and / or 48 can be achieved. Thus, one of the drive elements 49 could be provided between the first guide rail 46 and the second guide rail 47. Furthermore or additionally, one of the drive elements 49 could also be provided between the second guide rail 47 and the at least one further guide rail 48.
    The drive element (s) 49 may or may be e.g. serve to carry out a positive guidance of the adjusting movement between the individual guide rails. For example, a belt drive or racks conceivable with at least one arranged between them and in driving connection intermediate crevices or gear. If the intermediate scoring or the gear is driven by a drive means, a drive assist or an automatic adjustment can be achieved.
    It would also be possible, as has already been described above, to provide an adjusting and / or damping device 43. Thus, a weight compensation, e.g. be achieved by means of a scroll spring or acted upon by continuous pressure cylinder-piston assembly. The at least one adjusting and / or damping device 43 is operatively connected to the at least one protective element 32.
    The embodiments show possible embodiments, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments are possible with each other 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.
    REFERENCE SIGNS LIST 1 Production plant 30 Tool manipulation 2 Workpiece 3 Bending press 31 Tool store 4 Bending tool 32 Protective element 5 Bending punch 33 Adjusting device 6 Bending die 34 first longitudinal edge 7 Machine frame 35 second longitudinal edge 8 Base plate 36 Width 9 Sidewall 37 Console 10 Sidewall 38 Holding arm 11 Transverse union 39 first end region 12 front end surface 40 second end region 13 pressing beam 41 first pivot axis 14 front end face 42 second pivot axis 15 linear guide 43 adjusting and / or damping 16 pressing beam device 17 end face 44 adjusting device 18 end face 45 linear guide arrangement 19 tool holder 46 first guide rail 20 tool holder 47 second guide rail 21 drive assembly 48 more Guide rail 22 Drive means 49 Drive element 23 Power network 24 Control device 25 Input terminal 26 Spindle drive 27 Adjustment means 28 Supporting table 29 Protection unit
    权利要求:
    Claims (9)
    [1]
    claims
    1. manufacturing plant (1), in particular for the bending or Prägebie gene of a sheet metal to be produced workpiece (2), comprising - a bending press (3), in particular press brake, nengestell with a Maschi (7), a lower pressing beam (13 ), an upper pressing bar (16) and on the pressing beam (13, 16) arranged or trained tool shots (19, 20), - at least one bending tool (4) with at least one bending punch (5) and at least one bending die (6), - A tool-manipulation unit (30) for moving the bending tool (4) between the tool holders (19, 20) and a tool memory (31) or for changing the position of the bending tool (4) relative to the tool holders (19, 20), - a Protection unit (29) with at least one protective element (32) and an adjusting device (33, 44), by means of which adjusting device (33, 44) the at least one protective element (32) relative to the bending press (3) of a bending the The protection (4) at least partially covering the protective position in a bending tool (4) at least partially releasing release position is displaceable, and the at least one protective element (32) is plate-shaped and has a first longitudinal edge (34) and a second longitudinal edge (35) and of the two longitudinal edges (34, 35) is defined a width (36) of the protective element (32), and wherein the protective unit (29) is arranged in a driving region in front of the bending press (3), characterized in that the adjusting device (44 ) comprises at least two linear guide assemblies (45), and each of the linear guide assemblies (45) comprises a first guide rail (46) and a second guide rail (47) and at least one further guide rail (48), and the first guide rails (46) each fixed to the Bending press (3) are arranged, and in each case the at least one further guide rail (48) fastened on at least one protective element (32) gt is, and the at least two linear guide assemblies (45) in the direction of the longitudinal extent of the at least one protective element (32) are arranged spaced apart from each other.
    [2]
    2. Production plant (1) according to claim 1, characterized in that the protective unit (29), in particular its first guide rails (46), is held on the upper pressing beam (16).
    [3]
    3. Production plant (1) according to claim 1 or 2, characterized in that the width (36) of the at least one protective element (32) between its two longitudinal edges (34, 35) of an opening width between the tool holders (19, 20) at fully open Bending tool (4) corresponds.
    [4]
    4. Production plant (1) according to one of claims 1 to 3, characterized in that a maximum adjustment of at least two Linearfüh approximately arrangements (45) is selected such that in the protective position and fully open bending tool (4) of the second longitudinal edge ( 35) of the at least one protective element (32) is facing the lower pressing beam (13), and the at least one protective element (32) extends with its second longitudinal edge (35) at least as far as the lower tool holder (19).
    [5]
    5. manufacturing plant (1) according to one of claims 1 to 4, characterized in that the at least two linear guide assemblies (45) are held in verti cal alignment on the upper pressing bar (16).
    [6]
    6. Production plant (1) according to one of claims 1 to 5, characterized in that at least one of the linear guide assemblies (45) to at least one drive element (49) is provided.
    [7]
    7. manufacturing plant (1) according to claim 6, characterized in that one of the drive elements (49) between the first guide rail (46) and the second guide rail (47) is provided.
    [8]
    8. manufacturing plant (1) according to claim 6 or 7, characterized in that one of the drive elements (49) between the second guide rail (47) and the at least one further guide rail (48) is provided.
    [9]
    9. manufacturing plant (1) according to one of claims 1 to 8, characterized in that at least one adjusting and / or damping device (43) is provided, which at least one adjusting and / or damping device (43) with the at least one protective element (32) is operatively connected.
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    同族专利:
    公开号 | 公开日
    AT520038B1|2019-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3186256A|1963-07-22|1965-06-01|Reznick Louis|Safety guards for brakes, punch presses and similar machines|
    WO2013015272A1|2011-07-26|2013-01-31|株式会社 アマダ|Shutter device, press brake equipped with shutter device, and method for exchanging mold mounted on mounting part of press brake|WO2021094444A1|2019-11-13|2021-05-20|EVOBEND GmbH|Bending machine and method for working a workpiece by means of a bending machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50072/2018A|AT520038B1|2017-03-06|2017-03-06|Production plant with a protection unit|ATA50072/2018A| AT520038B1|2017-03-06|2017-03-06|Production plant with a protection unit|
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