US20200061691A1 - Production plant having a protective unit - Google Patents

Production plant having a protective unit Download PDF

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Publication number
US20200061691A1
US20200061691A1 US16/487,624 US201816487624A US2020061691A1 US 20200061691 A1 US20200061691 A1 US 20200061691A1 US 201816487624 A US201816487624 A US 201816487624A US 2020061691 A1 US2020061691 A1 US 2020061691A1
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United States
Prior art keywords
bending
protective element
protective
tool
press beam
Prior art date
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Abandoned
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US16/487,624
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English (en)
Inventor
Thomas Denkmeier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Maschinen Austria GmbH and Co KG
Original Assignee
Trumpf Maschinen Austria GmbH and Co KG
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Filing date
Publication date
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Assigned to TRUMPF MASCHINEN AUSTRIA GMBH & CO. KG. reassignment TRUMPF MASCHINEN AUSTRIA GMBH & CO. KG. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DENKMEIER, THOMAS
Publication of US20200061691A1 publication Critical patent/US20200061691A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0254—Tool exchanging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/001—Safety devices for guarding the human operator of punch presses or like machine tools performing an opening and closing travel
    • F16P3/005—Safety devices for guarding the human operator of punch presses or like machine tools performing an opening and closing travel having a movable screen or a sensor influencing the switching system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/001—Safety devices for guarding the human operator of punch presses or like machine tools performing an opening and closing travel
    • F16P3/006—Safety devices for guarding the human operator of punch presses or like machine tools performing an opening and closing travel having a screen moving with the machine and moving the operator out of danger, or restraining the operator, without influencing the switching system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/02—Screens or other safety members moving in synchronism with members which move to and fro
    • F16P3/04—Screens or other safety members moving in synchronism with members which move to and fro for machines with parts which approach one another during operation, e.g. for stamping presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/14—Particular arrangements for handling and holding in place complete dies
    • B21D37/145—Die storage magazines

Definitions

  • the invention relates to a production installation, in particular for air bending of workpieces to be manufactured from sheet metal, with a protective unit comprising at least one protective element, which serves in particular for covering of its bending tool during tool change as needed.
  • U.S. Pat. No. 3,186,256 A describes a bending machine for manufacturing workpieces or parts between at least one bending tool adjustable relative to one another.
  • the bending tool comprises a bending punch and a bending die, which are each held on a press beam.
  • one of the press beams is guided adjustably in the vertical direction on a machine frame.
  • a plate-shaped protective element is arranged upstream of the bending tool.
  • a support rod is provided, which is mounted on side walls of the machine frame located laterally of the press beams.
  • the support rod is arranged above the protective element and carries several actuator elements, which are connected thereto for vertical displacement of the protective element.
  • the adjusting stroke of the actuator elements between the protective position and the release position is limited by the relatively short adjusting track of the actuator elements formed as electro magnets.
  • the vertical adjustment of the protective element serves for not forming an interference contour for the portion of the workpieces to be manufactured which is pivoted upwards during the bending operation. Furthermore, with this, it is not possible to create sufficient free space in front of the bending tool in all cases of operation.
  • the bending tool comprises a bending punch and a bending die, which are each held on a press beam.
  • the plate-shaped protective element is held on the upper adjustable press beam by at least two hinge arrangements arranged at a distance from one another on a flat profile with an elongated hole arranged therein.
  • the flat profiles can be adjusted relative to the upper press beam in the vertical direction by provision of the elongated holes respectively arranged therein.
  • the protective element can be pivoted forward towards the operating side or folded up by means of the hinge arrangement.
  • a small vertical adjustment stroke could be achieved.
  • no sufficient free space without the formation of an interfering contour could be created.
  • U.S. Pat. No. 4,030,364 A A further design of a protective element for a bending machine is described in U.S. Pat. No. 4,030,364 A.
  • the upper press beam is adjustable in the vertical direction relative to the fixed machine frame.
  • the plate-shaped protective element is held on a carrier element of the machine frame arranged fixedly above the upper press beam in its lowermost position by means of retaining cables. In this lowermost position of the protective element, there is a feed gap for the sheet metal to be bent formed small as regards its height.
  • the protective element can be elevated during the downward movement of the upper press beam in the course of the bending operation.
  • One end of the cable of the pulley is fixedly connected to the protective element and the other end is fixedly connected to the press beam.
  • a double deflection of the cable of the pulley is carried out on the carrier element, wherein further, a deflection provided for between these two is carried out on the backside of the upper press beam.
  • the protective element is elevated relative to the lower press beam, whereby the previously small feed gap increases in height.
  • the disadvantage of this is that an adjusting movement of the protective element is only possible when the upper press beam is adjusted and the adjusting movement of the protective element depends on the adjusting stroke of the upper press beam.
  • the pulley arranged is complex and not always reliable in operation.
  • JPH 11-300421 describes a further design of a protective device with a plate-shaped protective element for a bending machine.
  • a pulley for adjusting the height of the protective element is provided respectively.
  • each of the pulleys extends in the vertical direction to a first deflection roller, from the latter to a second deflection roller located in the region of the backside of the side walls and from the latter to an actuator element formed by a cylinder piston arrangement.
  • the possible adjustment track of the protective element is determined by the adjusting stroke of the actuator elements.
  • the disadvantage of this is the unstable arrangement of the protective element in all of its positions.
  • Another protective device adjustable in the vertical direction on an installation has become known from JPH 06-34736 U.
  • a driven roller In the region of both longitudinal ends of the protective device, above each of these a driven roller is arranged.
  • a pull rope is wound around each of the rollers, wherein a first end of the pull rope is connected to the protective device and a second end is connected to a counterweight, respectively.
  • the protective device can be easily adjusted in the vertical direction from its protective position into the release position.
  • several installation components are to be provided for the adjusting mechanism, an unstable arrangement of the protective element due to the pulley and further, the possibility of creating interfering contours being given.
  • the production installation according to the invention can in particular serve for air bending or bottom bending of a workpiece to be manufactured from sheet metal, and comprise the following installation components:
  • the advantage achieved by this consists in that depending on the selection of the adjusting device, a sufficiently long adjustment track for the at least one protective element between its protective position and its release position is provided. Hence, a secure covering in the front region between the opened press beams with the bending tool arranged thereon can be achieved for the protective position.
  • the at least one protective element is adjusted into its release position, it is adjusted to be so far from the bending tool held on the press beam, owing to the adjustment track selected to be sufficiently long, that no interfering contour for the performance of bending operations is formed by the protective element.
  • brackets as the bearing basis and the holding arms or lever arms held thereon in an articulated manner, when the protective element is pivoted up from the protective position into the release position an adjustment track defined by the longitudinal extension of the holding arms can be provided for, with which the at least one protective element can be moved out of the working area. Moreover, hence, an arrangement of the at least one protective element preferably suspended in all operating positions on the respective holding arms can be achieved.
  • a space-saving adjusting device which allows for a straight adjusting movement, in particular by means of a telescopic guide, can hence be created.
  • the protective unit in particular its brackets or its first guide rails, is held on the upper press beam. Due to the fact that the entire protective unit is held on the upper press beam such that it moves therewith, the entire protective unit is always moved with it and the relative distance between the upper press beam and the protective unit, in particular the protective element, in the release position is kept equal. If hence, the relative position has once been determined in the release position, no interfering contour located closer is created in subsequent bending operations.
  • the width of the at least one protective element between its two longitudinal edges corresponds to an opening width between the tool holders of the completely open bending tool.
  • secure covering of the hazard area during the tool change can be achieved.
  • the headroom and/or width of the protective element can also be kept as low as possible.
  • Another embodiment is characterized in that the at least two holding arms are pivotable between the protective position and the release position of the at least one protective element, each by a pivot angle with a value selected from an angle range with a lower limit of 150° and an upper limit of 200°, in particular 180°.
  • a further possible embodiment has the characteristics of a longitudinal extension of the holding arms each approximately corresponding to the width of the at least one protective element between its two longitudinal edges. Hence, also in case of minimum widths of the protective element, a sufficient adjustment track can be achieved and a compact constructional unit can, nevertheless, be created.
  • the holding arms each starting out from the brackets project towards the side facing away from the lower press beam and the at least one protective element is arranged so as to be suspended on the side of the holding arms facing away from the upper press beam as well as in the direction towards the lower press beam.
  • both the holding arms starting out from the brackets and the at least one protective element connected to the holding arms in an articulated manner comprise a suspended arrangement in the direction towards the lower press beam.
  • a further preferred embodiment is characterized in that the brackets are arranged on the upper press beam such that in the protective position and with the bending tool being completely open, the second longitudinal edge of the at least one protective element faces the lower press beam and the at least one protective element with its second longitudinal edge extends at least to the lower tool holder.
  • the at least two brackets are arranged in an upper end section of the upper press beam.
  • Upper end section or end region of the press beam is understood such that the brackets are arranged in the region which is distanced farther from the lower press beam.
  • Another alternative embodiment variant is characterized in that at least one actuator and/or damping device is provided, said at least one actuator and/or damping device being operatively connected to one of the holding arms. Hence, by providing at least one actuator and/or damping device, a controlled pivoting movement of the holding arm(s) can be achieved.
  • a maximum adjustment track of the at least two linear guide arrangements is selected such that in the protective position and with the bending tool being completely open, the second longitudinal edge of the at least one protective element faces the lower press beam and the at least one protective element with its second longitudinal edge extends at least to the lower tool holder.
  • a further possible and optionally alternative embodiment has the characteristics that the at least two linear guide arrangements are held on the upper press beam in vertical orientation. Hence, a precise straight adjusting movement between the protective position and the release position can be achieved. By means of constant movement of the entire protective unit with the upper press beam, the relative distance in the release position between the upper press beam and the protective unit, in particular the protective element, can always be kept equal. If hence, the relative position has once been determined in the release position, no interfering contour located closer is created in subsequent bending operations.
  • Another embodiment is characterized in that at least one drive element is provided on at least one of the linear guide arrangements.
  • 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. Hence, a precisely predetermined adjusting movement between the first two guide rails can be achieved.
  • one of the drive elements is provided between the second guide rail and the at least one further guide rail. Hence, a consistent adjusting movement between the individual guide rails can be ensured.
  • another embodiment is characterized in that at least one actuator and/or damping device is provided, said at least one actuator and/or damping device being operatively connected to the at least one protective element.
  • at least one actuator and/or damping device By providing at least one actuator and/or damping device, a controlled pivoting movement of the holding arm(s) can be achieved. Moreover, hence, a facilitation of the return movement from the protective position into the release position in case of manual adjustment by the operator can be achieved.
  • the actuator device a counterbalance adjustment and a corresponding weight compensation can also be achieved.
  • the damping device the downward movement of the holding arm(s) from the upwardly projection position into the downwardly projecting position can be decelerated. Hence, a controlled downward movement of the holding arms along with the protective element held thereon can be achieved.
  • FIG. 1 a front view of a production installation with a bending press and schematically adumbrated protective unit
  • FIG. 2 a side view of the production installation according to FIG. 1 ;
  • FIG. 3 a front view and schematic representation of a first possible design of the protective unit in its protective position with adumbrated bending press
  • FIG. 4 a side view of the protective unit according to FIG. 3 in its protective position
  • FIG. 5 a side view of the protective unit according to FIG. 3 , however, in its release position;
  • FIG. 6 a front view and schematic representation of a further possible design of the protective unit in its protective position with adumbrated bending press
  • FIG. 7 the protective unit according to FIG. 6 in a top view onto the adjusting device.
  • equal parts are provided with equal reference numbers and/or equal component designations, where the disclosures contained in the entire description may be analogously transferred to equal parts with equal reference numbers and/or equal component designations.
  • specifications of location such as at the top, at the bottom, at the side, chosen in the description refer to the directly described and depicted figure and in case of a change of position, these specifications of location are to be analogously transferred to the new position.
  • FIGS. 1 and 2 show a very simplified schematic representation of a production installation 1 , which is in particular designed for air bending of workpieces 2 to be manufactured from sheet metal by means of die bending in the present case.
  • the production installation 1 used for bending in the present case comprises a bending machine, in the present exemplary embodiment a bending press 3 , in particular a press brake oder die bending press, for manufacturing the workpieces 2 or parts between at least one bending tool 4 adjustable relative to one another.
  • the bending tool 4 comprises at least one bending punch 5 , however, most commonly several bending punches 5 , and at least one bending die 6 , however, most commonly several bending dies 6 cooperating therewith.
  • the at least one bending punch 5 is arranged above the workpiece 2 to be manufactured on the bending press 3 and is held, in particular clamped, there correspondingly.
  • the at least one bending die 6 is also held, in particular held clamped, on the bending press 3 .
  • the “x” direction is generally referred to as the direction extending in perpendicular orientation in a horizontal plane with respect to the longitudinal extension of the bending tool 4 , in particular its bending punch 5 and bending die 6 .
  • the “y” direction is understood as the vertical direction which thus extends in the height direction of the bending tool 4 , and further in perpendicular direction with respect to the horizontal plane.
  • the “z” direction is understood as the direction which extends in the longitudinal direction and/or the longitudinal extension of the bending tool 4 , in particular its bending punch 5 and bending die 6 .
  • the longitudinal extension of the bending edge defined by the bending tool 4 is also oriented extending in the “z” direction.
  • a machine frame 7 of the bending press 3 for example comprises a base plate 8 on which side walls 9 , 10 are arranged, which rise vertically, are transversely spaced from one another and are oriented in parallel to one another. These are preferably connected to one another by a massive cross connection 11 for example formed from a sheet metal preform on their end regions distanced from the base plate 8 .
  • the side walls 9 , 10 can be formed approximately in a C-shape for the formation of a free space for forming the workpiece 2 , wherein a fixed first press beam 13 or lower press beam 13 , particularly standing on the base plate 8 , is mounted to front end faces 12 of near-base limbs of the side walls 9 , 10 .
  • This stationarily arranged and fixed press beam 13 may also be referred to as press table, which parts of the bending tool 4 are arranged on and also held on.
  • a further press beam 16 in particular a pressure beam, adjustable relative to the press beam 13 forming the table beam, is mounted in a guided manner in linear guides 15 .
  • the press beam 16 can also be referred to as second press beam or upper press beam or as pressure beam.
  • tool mounts 19 , 20 for equipping with the bending tool(s) 4 may be arranged on end faces 17 , 18 opposing one another and extending in parallel to one another of the two press beams 13 , 16 .
  • the bending tool(s) 4 can also be held on the tool holders 19 , 20 with interposition of an adapter which is not represented in more detail herein; while this is rather considered not favorable for a change operation of individual components or the entire bending tool 4 , it can still represent a possibility.
  • the shown bending press 3 for example comprises two driving means 22 operated with electric energy, which are line-connected with a controller 24 supplied from an energy grid 23 , as driving arrangement 21 for the adjustable press beam 16 , namely the pressure beam.
  • the operation of the bending press 3 in particular also the change operation of the bending tool 4 , can be controlled via an input terminal 25 with a communication connection to the controller 24 .
  • the driving means 22 can for example be electromotive spindle drives 26 , as are generally known, by means of which adjusting means 27 for a reversible adjusting movement of the upper press beam 16 formed by the pressure beam are for example drive-connected to it.
  • the driving means 22 is/are formed by adjusting means that can be hydraulically and/or pneumatically actuated.
  • cylinder-piston arrangements may be applied.
  • other driving means such as eccentric drives, toggle lever drives, rack and pinion drives etc., are also conceivable. Further details required for the operation of such a bending press 3 , such as feed devices and/or control devices, are not addressed in the present description so as to avoid an unnecessary length of the description.
  • a support table 28 can be provided or arranged in the front region—i.e. the feed region—of the bending press.
  • the support table 28 is merely shown partially and forms a support plane for the sheet metal to be bent.
  • the production installation 1 can also comprise a manipulator not represented in further detail here, said manipulator removing at least one piece from a storage stack of sheet metal to be formed and/or folded and transports it into the working area and/or the operating side of the bending press 3 .
  • the manipulator can itself comprise gripping pliers, which in turn comprises gripping fingers.
  • the gripping fingers each comprise clamping surfaces on the side facing the workpiece 2 to be manufactured.
  • a protective unit 29 can be arranged or provided in the region of the operating side or the feed side of the bending press 3 and thus as required in front of the bending tool(s) 4 .
  • the protective unit 29 serves the purpose of covering the opening width between the tool holders 19 , 20 with the bending tool 4 being completely closed in the region of the operating side or the feed side so far that during the tool change, the operator is prevented from an unintended access to the tool holders and the bending tool 4 located there.
  • the upper press beam 16 is adjustable relative to the lower press beam 13 for performing the bending operation. For tool change, the upper press beam 16 is arranged distanced farther from the lower press beam 13 , as is well-known.
  • the tool change is carried out on the back side of the press beams 13 , 16 by means of a tool manipulation unit 30 adumbrated in a simplified manner
  • the tool manipulation unit 30 serves for transporting the bending tool 4 between the tool holders 19 , 20 and a tool storage 31 or for changing the position of the bending tool 4 relative to its position on the tool holders 19 , 20 .
  • the protective unit 29 comprises at least one plate-shaped protective element 32 .
  • Said element is usually formed from a translucent or transparent material, in particular a plastic material.
  • the protective element 32 is arranged immediately upstream of the second or upper press beam 16 in both FIGS. 1 and 2 , wherein it is in a so-called release position represented in dotted lines in both figures. Moreover, the protective element 32 is also represented in a so-called protective position in full lines in FIG. 1 .
  • a detailed representation of the mount, the bearing and a possible adjusting mechanism thereof on the bending press 3 , in particular on the second or upper press beam 16 is refrained from, while a possible embodiment in this regard is represented and elucidated in further detail below in FIGS. 3 to 5 as well as 6 and 7 .
  • the release position is understood such that the protective element 32 allows for free access to the bending tool 4 held on the press beams 13 , 16 .
  • the protective position is given when the at least one protective element 32 , in case of bending punch 5 and bending die 6 being arranged distanced from one another at least sectionally or entirely, covers or secures an access starting out from the operating side or feed side so far that an operator cannot reach between the open press beams 13 , 16 arranged at a distance from one another during a tool change of the bending tool 4 .
  • the tool change can preferably be carried out automatically, with this usually being carried out in the region of the machine frame 7 located behind the operating side.
  • the performance of the tool change can for example be carried out by means of the tool manipulation unit 30 , in particular by means of a separate manipulator and/or a back gauge unit, as is well-known.
  • An interfering contour can be formed by an installation component or a machine component, which projects into the working space required for performing the bending operation and thus prevents or limits it.
  • the adjustment or displacement of the at least one protective element 32 can be carried out by means of an adjusting device 33 not represented in further detail in FIGS. 1 and 2 .
  • the at least one protective element 32 can be displaced relative to the bending press 3 from a protective position, which at least sectionally, preferably completely, covers the bending tool 4 into a release position which at least sectionally, preferably completely, releases the bending tool 4 .
  • the displacement can be carried out manually; however, also by means of a separate driving means.
  • the plate-shaped protective element 32 comprises a first longitudinal edge 34 as well as a second longitudinal edge 35 arranged so as to extend in the direction of its longitudinal extension.
  • the two longitudinal edges 34 , 35 define a width 36 of the protective element 32 .
  • the width 36 can also be referred to as transverse distance, which is determined in perpendicular direction with respect to the longitudinal edges 34 , 35 most commonly extending in parallel to one another.
  • the longitudinal extension of the protective element 32 is preferably selected such that it approximately corresponds to a longitudinal extension of the press beams 13 , 16 or the tool holders 19 , 20 arranged thereon.
  • the protective unit 29 in particular the at least one protective element 32 as well as the adjusting device 33 , is or are arranged in a feed region in front of the bending press 3 .
  • the arrangement is carried out frontally with respect to the bending press 3 .
  • the protective unit 29 is held on the upper press beam 16 . Hence, when the upper press beam 16 is adjusted, the protective unit 29 is moved with it.
  • FIGS. 3 to 5 show a first possible and possibly independent embodiment of the protective unit 29 , wherein equal reference numbers and/or component designations are used for equal parts as in FIGS. 1 and 2 above. In order to avoid unnecessary repetitions, it is pointed to/reference is made to the detailed description in FIGS. 1 and 2 preceding it.
  • the two press beams 13 , 16 are merely adumbrated partially.
  • the adjusting device 33 is merely represented in a simplified and stylized manner.
  • the adjusting device 33 comprises at least two brackets 37 and preferably the same amount of holding arms 38 —in the present example also at least two holding arms 38 .
  • the holding arm 38 can also be referred to as lever arm or pivoting arm.
  • Each of the holding arms 38 comprises a first end region 39 and arranged at a distance thereof in its longitudinal extension a second end region 40 .
  • Each of the brackets 37 is arranged for example on the machine frame 7 of the bending press 3 , however, in particular on the upper press beam 16 of the bending press 3 , in particular fixedly connected thereto, and arranged at a distance from one another in the direction of the longitudinal extension of the at least one protective element 32 .
  • Each of the holding arms 38 is mounted on one of the brackets 37 in an articulated manner each with its first end region 39 , whereby a first bearing point is formed respectively. Moreover, each of the holding arms 38 is connected to the at least one protective element 32 on the first longitudinal edge 34 facing away from the first press beam 13 in an articulated manner with its second end region 40 , whereby a second bearing point is formed respectively.
  • 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 be adjusted with these preferably in a steadily suspended arrangement.
  • the previously described width 36 of the at least one protective element 32 between its two longitudinal edges 34 , 35 approximately corresponds to an opening width between the tool holders 19 , 20 with the bending tool 4 being completely open. In this way, when the upper press beam 16 is in the maximum raised position, secure covering of the space between the two tool holders 19 , 20 can be achieved at any time.
  • the holding arms 38 along with the at least one protective element 32 can be displaced, in particular pivoted, from the protective position of the protective element 32 into the release position of the protective element 32 .
  • the brackets 37 form first pivot axes 41 oriented in parallel with respect to the longitudinal extension of the upper press beam 16 and aligned with one another. Pivoting each holding arm 38 is carried out in a pivoting plane oriented perpendicularly with respect to the pivot axes 41 .
  • the at least two holding arms 38 can be pivoted between the protective position and the release position of the at least one protective element 32 , each by a pivot angle with a value selected from an angle range with a lower limit of 150° and an upper limit of 200°, in particular 180°.
  • the holding arms 38 are preferable held so as to be suspended and thus be perpendicular to the brackets 37 and project in the direction towards the lower press beam 13 .
  • these project upwards towards the side facing away from the lower press beam 13 .
  • the at least one protective element 32 is arranged on the side of the holding arms 38 facing away from the upper press beam 16 and so as to be suspended on the holding arms 38 in the direction towards the lower press beam 13 .
  • both the holding arms 38 starting out from the brackets 37 and the at least one protective element 32 connected to the holding arms 38 in an articulated manner have a suspended arrangement in the direction towards the lower press beam 13 .
  • Suspended is understood to refer to the position caused by gravity.
  • a second bearing point with second pivot axes 42 is formed between each second end region 39 of the holding arms 38 and the first longitudinal edge 34 of the protective element 32 .
  • a longitudinal extension of the holding arms 38 between the two end regions 39 , 40 , in particular the pivot axes 41 , 42 , formed there in each case approximately corresponds to the width 36 of the at least one protective element 32 between its two longitudinal edges 34 , 35 in each case.
  • the longitudinal extension of the holding arms 38 could also be selected to be larger or smaller than the width 36 .
  • the brackets 37 are arranged on the upper press beam 16 in such manner that in the protective position and with the bending tool 4 being completely open, the second longitudinal edge 35 of the at least one protective element 32 faces the lower press beam 13 .
  • the at least one protective element 32 with its second longitudinal edge 35 preferably extends at least to the lower tool holder 19 . It proved to be beneficial if the at least two brackets 37 are arranged in an upper end section of the upper press beam 16 .
  • a schematically adumbrated actuator and/or damping device 43 can also be provided.
  • the at least one actuator and/or damping device 43 is preferably operatively connected to one of the holding arms 38 .
  • a tension spring that is connected to a holding arm 38 and extends towards the upper press beam 16 , or the like could be provided.
  • at least one of the holding arms 38 could be connected to a rotary drive for angular displacement.
  • the actuator device can in particular serve the purpose of counterbalance adjustment for the actuation movements between the protective position and the release position and vice versa to be carried out. Hence, the actuation movements can be facilitated for the operator as regards force.
  • FIGS. 6 and 7 show a further possible and possibly independent embodiment of the protective unit 29 for the bending machine and/or bending press 3 , wherein again equal reference numbers and/or component designations are used for equal parts as in FIGS. 1 through 5 above. In order to avoid unnecessary repetitions, it is pointed to/reference is made to the detailed description in FIGS. 1 to 5 above.
  • an adjustment track between the protective position and the release position for the at least one protective element 32 as long as possible is to be achieved.
  • linear guide arrangements 45 are provided for extending the adjustment track between the protective position and the release position of the protective element 32 .
  • the linear guide arrangements 45 can also be referred to as telescopic guides or telescope guide arrangements.
  • Each of the linear guide arrangements 45 comprises a first guide rail 46 , a second guide rail 47 and at least one further guide rail 48 .
  • at least two of the linear guide arrangements 45 are to provided per protective element 32 .
  • the at least two linear guide arrangements 45 are arranged at a distance from one another in the direction of the longitudinal extension of the at least one protective element 32 .
  • telescopic cylinders which provide sufficient stroke, can also be used.
  • the first guide rails 46 are stationarily arranged for example on the bending press 3 , in particular on its machine frame 7 , however, preferably on the respective upper press beam 16 , in particular mounted thereto.
  • the at least two linear guide arrangements 45 are further held on the upper press beam 16 in vertical orientation.
  • the at least one further guide rail 48 is in each case stationarily arranged on the at least one protective element 32 , in particular mounted thereto.
  • the second guide rail 47 is in each case provided directly immediately successive to the first guide rail 46 .
  • the guide rails are each guided on one another so as to allow for performing a defined adjustment track.
  • a maximum adjustment track of the at least two linear guide arrangements 45 is to be selected such that in the protective position and with the bending tool 4 being completely open, the second longitudinal edge 35 of the at least one protective element 32 faces the lower press beam 13 and the at least one protective element 32 with its second longitudinal edge 35 extends at least to the lower tool holder 19 .
  • At least one drive element 49 is provided on at least one of the linear guide arrangements 45 .
  • at least one drive element 49 By providing at least one drive element 49 , a controlled adjusting movement between at least individual ones of the guide rails 46 and/or 47 and/or 48 can be achieved.
  • one of the drive elements 49 could be provided between the first guide rail 46 and the second guide rail 47 . Further or additionally to this, 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 can for example serve for carrying out a compulsory guide of the adjusting movement between the individual guide rails.
  • a belt drive or toothed racks with at least one intermediate pinion or cogwheel arranged in between and being drive-connected would be conceivable. If the intermediate pinion or cogwheel is driven by a driving means, a drive support or an independent adjustment can be achieved.
  • an actuator and/or damping device 43 it would further be possible, as was also already described above, to provide an actuator and/or damping device 43 .
  • a counterbalance adjustment can be achieved for example by means of a constant force spring or a cylinder piston arrangement charged with constant pressure.
  • the at least one actuator and/or damping device 43 is operatively connected to the at least one protective element 32 for this purpose.
  • the indication 1 to 10 is to be understood such that it comprises all partial ranges based on the lower limit 1 and the upper limit 10, i.e. all partial ranges start with a lower limit of 1 or larger and end with an upper limit of 10 or less, for example 1 through 1.7, or 3.2 through 8.1, or 5.5 through 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US16/487,624 2017-03-06 2018-03-05 Production plant having a protective unit Abandoned US20200061691A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ATA50173/2017A AT519695B1 (de) 2017-03-06 2017-03-06 Fertigungsanlage mit einer Schutzeinheit
ATA50173/2017 2017-03-06
PCT/AT2018/060057 WO2018161101A1 (de) 2017-03-06 2018-03-05 Fertigungsanlage mit einer schutzeinheit

Publications (1)

Publication Number Publication Date
US20200061691A1 true US20200061691A1 (en) 2020-02-27

Family

ID=62044430

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/487,624 Abandoned US20200061691A1 (en) 2017-03-06 2018-03-05 Production plant having a protective unit

Country Status (5)

Country Link
US (1) US20200061691A1 (de)
EP (1) EP3592482B1 (de)
JP (1) JP7094977B2 (de)
AT (1) AT519695B1 (de)
WO (1) WO2018161101A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220379366A1 (en) * 2019-11-13 2022-12-01 EVOBEND GmbH Bending Machine And Method For Processing A Workpiece By Means Of A Bending Machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378665A (en) * 1931-09-05 1932-08-18 Alfred George Osborne Strong Improvements in and relating to safety appliances for punching, blanking and embossing presses and the like
US3186256A (en) * 1963-07-22 1965-06-01 Reznick Louis Safety guards for brakes, punch presses and similar machines
US3969955A (en) * 1975-08-14 1976-07-20 H C Products Co. Press brake safety device
JPS6088200U (ja) * 1983-11-24 1985-06-17 アイダエンジニアリング株式会社 プレス機械の安全ガ−ド
JPH11300421A (ja) * 1998-04-21 1999-11-02 Nikko Co Ltd プレスブレーキ
JP5848908B2 (ja) * 2011-07-26 2016-01-27 株式会社アマダホールディングス シャッタ装置及びプレスブレーキ
JP2016097421A (ja) * 2014-11-19 2016-05-30 アイダエンジニアリング株式会社 プレス機械の昇降式のガード装置およびそれを用いたプレス装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220379366A1 (en) * 2019-11-13 2022-12-01 EVOBEND GmbH Bending Machine And Method For Processing A Workpiece By Means Of A Bending Machine

Also Published As

Publication number Publication date
JP7094977B2 (ja) 2022-07-04
WO2018161101A1 (de) 2018-09-13
EP3592482B1 (de) 2022-04-27
EP3592482A1 (de) 2020-01-15
AT519695A1 (de) 2018-09-15
AT519695B1 (de) 2019-04-15
JP2020509936A (ja) 2020-04-02

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