EP1689540B1 - Convoyeur destine a transporter des pieces a travailler dans une presse - Google Patents

Convoyeur destine a transporter des pieces a travailler dans une presse Download PDF

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Publication number
EP1689540B1
EP1689540B1 EP04797267A EP04797267A EP1689540B1 EP 1689540 B1 EP1689540 B1 EP 1689540B1 EP 04797267 A EP04797267 A EP 04797267A EP 04797267 A EP04797267 A EP 04797267A EP 1689540 B1 EP1689540 B1 EP 1689540B1
Authority
EP
European Patent Office
Prior art keywords
lateral beam
press
bar
conveyor
work piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04797267A
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German (de)
English (en)
Other versions
EP1689540A1 (fr
Inventor
Rudolf Heid
Hans-Ulrich Kurt
Ulrich Lehmann
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.)
Guedel Group AG
Original Assignee
Guedel Group AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP1689540A1 publication Critical patent/EP1689540A1/fr
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Publication of EP1689540B1 publication Critical patent/EP1689540B1/fr
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Classifications

    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/105—Manipulators, i.e. mechanical arms carrying a gripper element having several degrees of freedom

Definitions

  • the invention relates to a conveyor for transporting work pieces in a press, in particular a press line or multiple-die press, from a first station to a second station adjacent to the first station, comprising at least one lateral beam arranged on a side of the press, essentially extending parallel to a transport direction of the conveyor, at least one bar having grippers for gripping the work piece to be transported, whereby the bar is attached to the lateral beam in such a way that it is movable along a longitudinal extension of the beam, and for each lateral beam an assembly for supporting the lateral beam.
  • Sheet metal parts are formed in a press, such as a hydraulic, hydroforming, mechanical, electrical or pneumatic press, typically including an upper die and a corresponding lower die.
  • the dies are moved against each other, and thereby the work piece arranged in the work space between the dies is formed.
  • the form of the dies determines the impact on the work piece and therefore the resulting form.
  • a succession of forming steps using differently shaped dies is necessary until the desired form of the sheet metal part is obtained.
  • a plurality of presses is arranged successively to form a press line, or a press is employed that includes multiple dies.
  • the capacity of the press line or multiple-die press is determined by the capacity of the press, i.e. the time required for carrying out one forming operation.
  • the capacity is significantly depending on the efficiency of the transport of the work pieces from one press station to the next one. It is therefore important to employ a fast transfer system for automatically transporting work pieces from one press station to the next one.
  • the German patent application DE 100 10 079 A1 refers to a conveyor attached to a vertical support of a press.
  • the conveyor comprises a vertical drive having two cogwheels independently acting on two vertical cograils. Both the cograils act on a third cogwheel arranged in between them, to which a pivotable arm is directly connected.
  • a work piece may be transported from a press station to the next one.
  • the European patent EP 0 850 709 B1 discloses a conveyor where a cross bar is attached on both its sides to guide-rod mechanisms.
  • the rods of the mechanism are independently attached to vertically movable slides mounted to a vertical press support. By displacing the slides the cross bar is movable in a vertical as well as in a horizontal direction.
  • EP 0 309 430 A1 (Volvo ) relates to a conveyor for a press line that is designed in such a way that the floor space in between the presses is left completely free.
  • One of the disclosed embodiments comprises a central stand having two vertical guides. Height adjustment slides are arranged for movements along the guides. The slides have the form of arms which project from the guides and which carry at their respective ends lateral adjustment slides. These slides carry a longitudinal rail that may be tilted about its longitudinal axis as well as about a vertical axis. Furthermore, the rail may be rotated about its longitudinal axis.
  • a trolley carrying a gripping device that is rotatable about several axes.
  • a work piece is removed from the press with the aid of a feeder and gripped by the gripping device of the conveyor. Firstly, the gripping device is rotated 90° around a vertical axis, subsequently the work piece is transported along the rail whereas the gripping device is simultaneously rotated 180° about a horizontal axis oriented perpendicular to the transport direction. Finally, the gripping device is again rotated around 90° in such a way that the work piece may be transferred to another feeder moving the work piece into the next press.
  • This device allows for repositioning and reorienting the work pieces during the transport process. However, it is not suitable for heavy and/or extensive work pieces and does not allow for fast transport speeds.
  • the assembly for supporting the lateral beam comprises a pivoting mechanism for pivoting the lateral beam around a horizontal pivotal axis perpendicular to the transport direction, the pivoting mechanism comprising two spindles, the spindles being independently operable in order to pivot and preferably vertically displace the lateral beam.
  • the grippers are rotatably movable for at least compensating a change of orientation of the work piece due to the pivoting of the lateral beam.
  • the lateral beam comprises two couplings arranged along the longitudinal extension of the lateral beam, whereby each of the couplings cooperates with one of the spindles.
  • the vertical displacement of the bar attached to the lateral beam is achieved by the pivoting motion of the entire lateral beam.
  • This motion allows for rapidly lowering and lifting the bar, the lateral beam acting as a lever.
  • the mass of the components to be moved during the transport process is reduced.
  • the transport range of the inventive conveyor is not limited; it is generally determined by the length of the lateral beam.
  • the construction of the conveyor according to the invention is simple and therefore the conveyor may be produced inexpensively.
  • the lateral beam always essentially extends parallel to the transport direction of the conveyor.
  • the pivoting angle relative to a horizontal plane is at most 3 - 15°. This is sufficient for gripping a work piece, lifting it and transporting it out of the first station.
  • the horizontal movement of the work piece is substantially achieved by the movement of the bar along the lateral beam.
  • the stations between which the work pieces are transported may be press stations comprising two cooperating dies as well as other stations of a transfer press such as an initial feed station, an intermediate deposit station arranged in between press stations or a final delivery stack or a conveyor, carrying away the formed work pieces.
  • the conveyor may e. g. be constituted by a usual conveyor belt, by a robot stacking the formed work pieces or by a shuttle transporting the work pieces to an unloading station.
  • the grippers may be freely chosen from existing solutions, depending on the work pieces to be transported.
  • the grippers may grip the work pieces in particular by suction, magnetic forces, form fit or traction as do suction tools, magnetic tools or tools that engage with recesses, openings or protrusions of the work pieces.
  • the bar for gripping the work pieces extends horizontally and perpendicular to the transport direction.
  • any direction of the bar is possible, which allows for gripping and disengaging the work pieces in the stations of the press.
  • the rotary motion of the grippers is preferentially achieved by rotating the bar around its longitudinal axis.
  • the longitudinal axis of the bar In the usual case of a horizontal bar, extending perpendicular to the transport direction, the longitudinal axis of the bar is parallel to the pivotal axis of the lateral beam. Therefore, by rotating the bar around its longitudinal axis the grippers are rotated such that the change of orientation of the work piece resulting from the pivoting of the lateral beam may be exactly compensated.
  • the rotary motion of the grippers is not limited to compensating the change of orientation however, but the orientation of the work piece may be changed as desired during the transport from a first to a second station, e. g. in order to adapt the orientation to the form and configuration of the lower die of the second station.
  • the assembly supporting the lateral beam is arranged sideways of the press, preferably centrally in between the first and the second station.
  • the assembly may be freestanding or attached to a neighboring station, in particular to a vertical support of a press, or attached to a bed of the press or of the press line.
  • the pivoting mechanism is formed such that the pivotal axis crosses a vertical plane comprising the lateral beam either above, below or through the lateral beam, in particular close to a middle portion of the lateral beam.
  • the lateral beam constitutes a rocker and during its motion along the beam the bar crosses the stationary point of its path, i.e. the point that does not move vertically if the lateral beam is pivoted. Therefore, the bar may be lifted and lowered at both the endpoints of its path, allowing for picking up or depositing the work piece near both ends of the lateral beam.
  • the arrangement allows for a simple construction having minimized torques and therefore minimized forces acting on components holding the lateral beam. This is especially true if the pivotal axis crosses the vertical plane close to the middle portion of the lateral beam, such that the mass compensation is optimized and the distribution of forces onto the components holding the lateral beam is most symmetric. Additionally, the end points of the beam perform a substantially vertical movement if the lateral beam is pivoted around a pivotal axis arranged close to the center of the lateral beam.
  • the conveyor comprises two lateral beams arranged across the press and the bar is a cross-bar extending across the press, attached to the two lateral beams.
  • the invention is not restricted to conveyors having cross bars but extends to conveyors with cantilever arms attached to the lateral beam, where the grippers for gripping the work piece are attached to these arms.
  • lateral beams with attached cantilever arms may be arranged on both sides of the press or the conveyor is single-sided, i.e. all the cantilever arms for transporting the work pieces engage into the press from the same side.
  • At least one of the assemblies for supporting one of the two lateral beams is supported such that is relocatable in a direction transverse to the transport direction, in order to adjust a distance between the two lateral beams.
  • This allows for easily adapting the length of the cross bar to the width of the press, which in turn is depending on the size of the dies used.
  • Either one of the assemblies is movable relative to the other, e. g. on rails, or both the assemblies holding the same cross-bar, arranged across the press are symmetrically movable.
  • the assemblies are mounted at fixed positions and the employed cross-bars are of a predetermined length allowing for transporting work pieces that have a maximum width processable by the press.
  • the assembly further comprises a lift mechanism for displacing the lateral beam in a vertical direction.
  • a lift mechanism for displacing the lateral beam in a vertical direction.
  • This allows for lifting or lowering the lateral beam into a position where maintenance work may be carried out unhindered by the lateral beams, e. g. such that the dies of the press may be changed.
  • the conveyor may be quickly adapted to differently formed presses and/or dies.
  • the vertical movement of the gripper bar during operation of the press is substantially (preferably entirely) achieved by the pivoting motion of the lateral beam
  • the vertical displacement by the lift mechanism may be subsidiary employed during the transporting process if this allows for faster operation, e. g. in the case of exceptionally formed dies.
  • the conveyor may be formed such that the lateral beam is removable in another way for doing the maintenance work, e. g. by folding it away or by rotating the beam by about 90° into an upright position, such that the dies may be removed and inserted in between the beams.
  • At least one of the couplings between the spindle and the lateral beam comprises a compensating mechanism for compensating a varying distance between the support points due to the independent operation of the spindles.
  • the two spindles are arranged parallel to each other and extend in a vertical direction.
  • the support points are generally arranged side by side on the lateral beam.
  • the lateral beam is vertically displaced if both the spindles are operated synchronously in the same sense of rotation such that both support points are concurrently lifted or lowered.
  • the compensating mechanism advantageously comprises a horizontal guidance for one of the couplings between the spindle and the lateral beam.
  • the spindles and couplings form ball screw assemblies.
  • the lateral beam comprises two couplings arranged along the longitudinal extension of the lateral beam, preferably symmetrically and close to a center of the lateral beam. Each of the couplings cooperates with one of the spindles. Arranging the couplings along the longitudinal extension of the lateral beam allows for directly coupling the spindles to the support points of the beams, where the lateral beam crosses the spindles; without the need for some kind of arm or similar intermediate piece. Thereby, the construction of the pivoting mechanism (especially of the couplings between the spindles and the support points of the lateral beam) is simplified and the space required (especially in a direction across the press) is reduced.
  • the arrangement of the couplings close to the center of the lateral beam allows for rapidly pivoting the lateral beam by moderate displacements of one of the support points or both support points of the lateral beam.
  • the symmetric arrangement with respect to the center of the lateral beam provides for an optimum weight compensation of the two outer parts of the beam.
  • the spindles are coupled to terminal portions of the beam, e. g. by means of arms connecting the spindles to the support points of the beam.
  • the lateral beam comprises a telescopic drive mechanism for the sliding movement of the bar.
  • a telescopic drive mechanism for the sliding movement of the bar. This allows for faster movement of the bar along the longitudinal extension of the beam without having to increase the relative acceleration between neighboring moved components. Therefore, the resulting acceleration of the bar may be increased, leading to improved performance of the conveyor.
  • the range of the conveyor may be increased without having to lengthen the entire lateral beam. This avoids conflicts between neighboring beams and reduces the weight of the beam assembly.
  • the telescopic drive mechanism is constituted by a support beam attached to the pivoting mechanism, a first carriage slidably mounted to the support beam and a second carriage slidably mounted to the first carriage.
  • telescopic drive mechanisms may be implemented to the lateral beam.
  • an intermediate linear guideway is arranged between the support beam and the first carriage, whereby the guideway is slidable with respect to the support beam as well as with respect to the first carriage.
  • the linear guideway is designed and arranged in such a way that its position with respect to the support beam and the first carriage is uniquely defined by the relative position of the first carriage with respect to the support beam. This may be achieved by providing for positive traction between the linear guideway and the support beam and the first carriage. Thereby, an additional drive for the additional stage of the telescopic drive mechanism is not required.
  • the linear guideway By employing the linear guideway, the relative velocities of the linearly moving parts may be reduced, i.e.
  • the relative velocity of the first carriage with respect to the support beam may be apportioned to a first velocity of the linear guideway with respect to the support beam and to a second velocity of the first carriage with respect to the linear guideway.
  • a linearly displaceable linear guideway allows for reliably supporting the first carriage on the support beam even in cases where the length of the support beam is reduced. By reducing the length and therefore the weight of the support beam, the forces and moments acting on the pivoting mechanism decrease.
  • due to the smaller extension of the (linearly fixed) support beam conflicts between the beam and the neighboring press stations may be avoided.
  • all the drives for moving the bar along the beam as well as for pivoting the beam are stationary in respect of the motion of the bar along the longitudinal extension of the beam.
  • the mass of the components that have to be rapidly moved is minimized.
  • the power supply of stationary drives is much simpler than in the case of moving drives, requiring drag chains etc.
  • the drive for pivoting the longitudinal beam and thereby achieving the vertical displacement of the bar is arranged independently of the movement of the bar along the lateral beam.
  • the drive is completely stationary as e. g. are two spindles attached to the assembly and coupled to the lateral beam.
  • the drive for moving the bar along the beam is again stationary in respect of the motion of the bar along the beam.
  • it may be attached to the central portion of the lateral beam and comprise a transmission such as a drive shaft, coupled to a carriage moved relative to the beam.
  • a transmission such as a drive shaft
  • the drive for moving the bar along the beam may e. g. comprise a linear induction motor arranged between the longitudinal beam and a carriage holding the bar.
  • a first stage of the telescopic drive mechanism may be actuated by a stationary electric motor by means of a rack-and-pinion gear, whereas further stages are actuated by linear motors.
  • a conveyor system for transporting work pieces in a press line or multiple die press comprises a plurality of conveyors, arranged consecutively.
  • N+1 conveyors are required: N-1 conveyors in between the press stations, one conveyor for feeding the work pieces to the first press station and one conveyor for removing the work pieces from the last press station.
  • two consecutive conveyors are preferably arranged such that the work piece may be handed over from a first of the conveyors to the second of the conveyors, whereby the work piece is flipped, i.e. rotated by about 180°.
  • a dedicated intermediate station for flipping the work piece is not required.
  • a method for transporting work pieces in a press, in particular a press line or multiple-die press, from a first station to a second station adjacent to the first station, employing a bar attached to a lateral beam arranged on a side of the press, extending parallel to a transport direction comprises the following steps:
  • the hand-over position is reached by depositing the work piece in the second station, i.e. a press, an intermediate deposit station, a final delivery stack or a conveyor.
  • the second station i.e. a press, an intermediate deposit station, a final delivery stack or a conveyor.
  • Some of the steps may be performed simultaneously, namely the lifting and/or lowering and transportation steps a) and b), d) and e) and/or e) and f), i.e. moving the bar along the longitudinal extension of the beam and pivoting, at least partially take place simultaneously.
  • the transporting process may be expedited.
  • the press operation i.e. lowering of the upper die
  • the path of the empty or loaded bar may be customized by accordingly controlling the pivoting and the lateral motion of the bar.
  • the motions of bars assigned to different stations are independently controllable allowing for further optimization, above all in press lines where the press stations itself may be operated asynchronously.
  • the method comprises the further step of rotatably moving the grippers for at least compensating a change of orientation of the work piece due to the pivoting of the lateral beam.
  • the rotary motion of the grippers is not limited to compensating the change of orientation but the orientation of the work piece may be changed as desired during the transport from a first to a second station, e. g. in order to adapt the orientation to the configuration of the lower die of the second station.
  • the method may include the further step of rotatably moving the grippers of both conveyors such that the work piece held by the grippers of the first conveyor is positioned in a hand-over position, where it may be directly transferred to the second grippers of the other conveyor. Thereby, the work piece is flipped. Flipping the work piece before transporting it to the next press station is frequently required, namely in the case of double-action presses. Employing the inventive method a dedicated intermediate station is spared.
  • the Figure 1 shows a press line provided with a conveyor system according to the invention.
  • the press line 1 includes four press stations 10, 20, 30, 40 that are consecutively arranged in a row. The distance between the centers of adjacent press stations amounts to about 5-6 m.
  • Each of the press stations 10...40 features an upper die 11, 21, 31, 41 and a corresponding lower die 13, 23, 33, 43.
  • the upper dies 11...41 are individually vertically movable by respective drives and gears arranged in housings 12, 22, 32, 42 arranged on top of the press stations 10...40. These mechanisms for moving the upper dies 11...41 are as such known in the field of press technology and are not shown in detail.
  • the work pieces are formed in between the upper dies 11...41 and the lower dies 13...43.
  • the upper dies 11...41 are mounted on press stands 14, 24, 34, 44, each of them comprising four posts arranged around the work spaces 15, 25, 35, 45 in between the dies 11...41, 13...43.
  • the posts of the press stands 14...44 as well as the lower dies 13...43 may be individually supported, on individual press beds for each press or on a common press bed for the entire press line 1.
  • conveyors 52, 53, 54 are arranged. Further conveyors 51, 55 are arranged before the first press station 10 and after the last press station 40.
  • the first conveyor 51 is arranged in front of the first press station 10 for feeding the press line 1 by raw work pieces from a feeding station (not displayed).
  • the second conveyor 52 is arranged in between the press stands 14, 24 of the first press station 10 and the second press station 20, the second conveyor 53 is arranged in between the press stands 24, 34 of the second press station 20 and the third press station 30, and the third conveyor 54 is arranged in between the press stands 34, 44 of the third press station 30 and the fourth press station 40.
  • the last conveyor 55 is arranged after the last press station 40 for removing the formed work piece from the press line 1 and feeding it to a final station, such as a final delivery stack or a conveyor, carrying away the formed work pieces.
  • a final station such as a final delivery stack or a conveyor
  • Each of the conveyors 51...55 is individually supported. In the displayed situation, all of the conveyors 51...55 are in the leftmost position, ready for accepting a work piece from the feeding station, respectively the press stations 10, 20, 30, 40 on their left sides.
  • the Figure 2 is a perspective view of a conveyor according to the invention.
  • the conveyor 52 is built up by a first support assembly 100 arranged on one side of the press line, a second support assembly 200 arranged on the other side, across the press line, a first lateral beam 300 supported by the first support assembly 100 and a second lateral beam 400 supported by the second support assembly 200.
  • a cross-bar 500 is attached to both the lateral beams 200, 400 and extends across the press line, perpendicular to the transport direction that coincides with the axis of the press line.
  • the conveyor 60 is dimensioned such that only its cross-bar 500 penetrates the work spaces 15, 25 of the presses.
  • the support assemblies 100, 200 as well as the lateral beams 300, 400 are arranged laterally of the work spaces 15, 25.
  • the range of the conveyor 52 i.e. the area where work pieces may be picked up or deposited, extends from the center of the first work space 15 to the center of the second work space 25. Accordingly, the range of the adjacent conveyor extends from the center of the second work space 25 to the center of the work space of the adjacent station. That way, each work piece arranged in one of the stations may be reached by the two adjacent conveyors.
  • the Figures 3-6 are different further views of the conveyor:
  • the Figures 3-5 are stand-up views from the exterior and the interior side of a press and along the axis of the press, respectively;
  • the Figure 6 is a top-view of the conveyor.
  • the support assembly 100 comprises two parallel vertical posts 101, 102 fixed in a distance by three horizontal plates: a base plate 103, an intermediate plate 104 and a top plate 105.
  • the vertical posts 101, 102 have an I-shaped profile (see Fig. 2 ), its main extension being perpendicular to the axis of the press.
  • the base plate 103 serves as a platform, thereby improving the stability of the support assembly 100.
  • the top plate 105 carries two drives 106, 107, each of them coupled to one end of a vertical spindle 108, 109, arranged on the inner side of the support assembly 100.
  • the other ends of the spindles 108, 109 are borne by bearings fixed to the intermediate plate 104.
  • one of the vertical posts 102 carries a vertical guidance 110, extending parallel to the respective spindle 109, on the same inner side of the vertical post 102.
  • the lateral beam 300 Attached to the inner side of the support assembly 100 is the lateral beam 300.
  • the lateral beam 300 comprises two couplings 301, 302 arranged along the longitudinal extension of the lateral beam 300, symmetrically and close to its center.
  • Each of the couplings 301, 302 cooperates with one of the spindles 108, 109, constituting a ball screw assembly.
  • the couplings 301 comprise a vertical inner thread, interacting with the outer thread of the vertical spindles 108, 109 by means of a ball bearing formed in between the threads.
  • the vertical inner thread is rotatably fixed with respect to its main (vertical) axis but rotatable around a horizontal axis with respect to the lateral beam 300.
  • the couplings 301, 302 are lifted or lowered, respectively. Therefore, by independently operating the spindles 108, 109 the incline of the lateral beam 300 may be set; by simultaneously operating both spindles 108, 109 to have the same rotational speed and the same sense of rotation the lateral beam 300 is lifted or lowered without changing its incline. Both kinds of movements, i.e. pivoting and lifting or lowering, may be superposed by accordingly choosing the rotational movement of the spindles 108, 109.
  • one of the couplings 301 comprises a compensating mechanism 303, which is constituted by two rails parallel to the longitudinal extension of the lateral beam 300 on which the coupling 301 is slidably movable.
  • the other coupling 302 is fixed to the lateral beam 300.
  • the lateral beam 300 comprises a base part 310, a telescopic drive mechanism 320 and a carriage 330 to which one end of the cross-bar 500 is attached (cf. Fig. 2 ).
  • the base part 310 is constituted by a hollow section 311 attached to the couplings 301, 302.
  • Two parallel rails 312, 313 are arranged on the inner face of the hollow section 311, extending along the longitudinal extension of the base part 310.
  • the telescopic drive mechanism 320 is arranged on the inside of the base part 310 and guided on these rails 312, 313.
  • the drive mechanism 320 comprises an intermediate carriage 321 having rollers at both ends over which two belts 322, 323 are guided around the intermediate carriage 321, along its longitudinal extension.
  • the main extension of the intermediate carriage 321 is slightly longer than half the length of the base part 310 of the lateral beam 300.
  • the intermediate carriage 321 comprises a pair of parallel rails 324, 325 for slidably guiding the carriage 330.
  • the belts 322, 323 are fixed to the carriage 330, on the other hand, the belts are fixed to the central portion of the base part 310.
  • the carriage 330 is moved in the same direction, having the same velocity relative to the intermediate carriage 321, because of the relative movement of the belts 322, 323 with respect to the intermediate carriage 321. Due to the superposition of the movements the resulting velocity of the carriage 330 with respect to the base portion 310 is about twice that of the intermediate carriage 321.
  • the Figures 2-6 show the carriage 330 in its leftmost position.
  • the intermediate carriage 321 together with the carriage 330 are salient with respect to the base part 310 of the longitudinal beam 300.
  • the length of the lateral beam 300 corresponds to the distance of adjacent press stations, i.e. 5-6 m, reduced by the excess length of the telescopic drive mechanism 320.
  • This allows for positioning adjacent conveyors in a press line or multiple-die press such that both conveyors may reach the same intermediate position where the work piece is to be deposited or to be picked up, without interference between the lateral beams of the conveyors.
  • the protruding portion of the intermediate carriage 321 penetrates the interspace between two adjacent lateral beams exclusively during the pickup or deposition of a work piece. Otherwise, the base part 310 leaves enough room for pivoting the lateral beams and for positioning the cross-bar of the adjacent conveyor in the interspace between the beams.
  • a drive 304 is attached to the back side of the central portion of the lateral beam 300. It penetrates the interspace between the vertical posts 101, 102 which leaves ample clearance such that the drive 304 does neither interfere with the pivoting of the lateral beam 300 nor with its lifting or lowering.
  • the drive cooperates with a rack attached to the intermediate carriage 321, such that the intermediate carriage 321 may be moved relative to the base part 310 of the lateral beam 300.
  • the cross-bar 500 On the carriage 330 a drive 331 for rotating the cross-bar 500 is arranged. This drive 331 may be small if it is coupled to the cross-bar 500 by a gear reduction.
  • the cross-bar 500 is constituted by a lattice-like frame 501 carrying a plurality of suction tools 502 for gripping the work pieces to be transported.
  • rotating the cross-bar 500 serves to compensate the change of orientation of the cross-bar 500 due to the pivoting of the lateral beam 300.
  • the orientation of the cross-bar 500 may be optimized for picking up a work piece, and the orientation of the transported work piece may be adapted to the destination of the work piece, e. g. to the configuration of the die of the destination press or of a delivery stack.
  • the cross-bar 500 may be automatically decoupled from the carriage 330 for replacement by another cross-bar, that has e. g. another kind of grippers. The replacement of grippers preferably takes place on a moving bolster or on a separate carriage.
  • the power for the drive 331 for rotating the cross-bar 500 as well as compressed air needed for the suction tools 502 are delivered by means of a drag chain comprising electric cables and an air line, arranged on top of the base part 310 of the lateral beam 300.
  • a drag chain comprising electric cables and an air line, arranged on top of the base part 310 of the lateral beam 300.
  • the drag chain is not displayed in the figures.
  • the Figure 7 shows a detailed view of the telescopic drive mechanism of the conveyor.
  • the telescopic drive mechanism 320 is a part of the lateral beam 300 which is attached by means of a coupling 301 to the spindle 108 borne at its lower end on the intermediate plate 104 of the support assembly 100.
  • the coupling 301 comprises a rotary plate with a pivot bearing for adjusting the orientation of the coupling 301 attached to the lateral beam 300 relative to the vertical thread coupled to the spindle 108.
  • the coupling 301 further comprises a compensating mechanism 303 constituted by a horizontal rail attached to the base part 310 of the lateral beam 300 and a corresponding guidance attached to the coupling 301.
  • the compensating mechanism 303 allows for compensating the varying distance between the support points of the couplings on the spindles.
  • the lateral beam 300 comprises a support 305 that cooperates with the vertical guidance 110 fixed to one of the vertical posts 101.
  • the support 305 carries part of the tilting torque and support forces arising between the lateral beam 300 and the support assembly 100 and thereby releases the spindles.
  • the drive 304 is attached to the back side of the hollow section 311 of the base part 310 of the lateral beam 300.
  • a drive shaft 306 protrudes from the front face of the drive 304, its axis being horizontal and perpendicular to the main extension of the lateral beam 300.
  • the drive shaft 306 penetrates the hollow section 311 through an opening in the rear surface.
  • a pinion 307 arranged in front of the hollow section 311 is attached to the front end of the drive shaft 306, through another opening in the front surface of the hollow section 311.
  • the pinion 307 cooperates with a rack 308 attached to and extending along the intermediate carriage 321. Therefore, by operating the drive 304 the intermediate carriage 321 is driven along the main extension of the base part 310 of the lateral beam 300.
  • the intermediate carriage 321 is slidably mounted to the base part 310 by guidances 326, 327 attached to the intermediate carriage 321 cooperating with the rails 312, 313 of the base part 310.
  • the carriage 330 holding the cross-bar 500 is slidably mounted to the intermediate carriage 321 by guidances 332, 333 attached to the carriage 330 cooperating with the rails 324, 325 of the intermediate carriage 321.
  • the belts 322, 323 guided around the intermediate carriage 321 are fixed to the central portion of the base part 310, near to where the drive 304 is arranged. As well, the belts 322, 323 are fixed to the carriage 330. The belts 322, 323 are freely movable with respect to the intermediate carriage 321, guided by the rollers arranged at both its ends.
  • the Figures 8A-F are a schematic illustration of the inventive process.
  • the Figure 8A shows the cross-bar 500 in its rightmost position; the lateral beam 300 is inclined such that the cross-bar 500 is lowered relative to the center of the lateral beam 300.
  • the maximum lift range needed is about 30 cm or less, which means that the maximum inclination angle relative to a horizontal plane is about 6° or less.
  • picking up of a work piece 2 positioned in the first station 10 is accomplished by providing a negative pressure to the suction tools of the cross-bar 500.
  • the right spindle 107 of the support assembly 100 is operated to pivot the lateral beam 300, such that it reaches its horizontal position.
  • the work piece 2 is lifted up from the first station 10.
  • the horizontal movement of the carriage 330 holding the cross-bar 500 starts. This allows for rapidly removing the cross-bar 500 from the work space in between the upper and the lower die and therefore for maximizing the efficiency of the process performed by the press line.
  • the cross-bar 500 is rotated in order to compensate the relative orientation of the cross-bar 500 with respect to the carriage 330. Therefore, the orientation of the work piece 2 remains constant.
  • Figure 8D shows the situation immediately before the pivoting movement of the lateral beam 300 starts.
  • the carriage 330 with the cross-bar 500 has not yet reached its leftmost position and continues to be moved to the left during the pivoting motion of the lateral beam 300, effected by rotating the left spindle 106.
  • Figure 8E shows the situation in which the leftmost position is reached and in which the lateral beam 300 is inclined such that the work piece 2 may be disengaged from the cross-bar 500 and deposited in the second station 20.
  • the cross-bar 500 is rotated in order to compensate the change of relative orientation of the cross-bar 500 with respect to the carriage 330, such that the orientation of the work piece 2 remains constant.
  • the empty cross-bar 500 will be lifted by pivoting the lateral beam 300 and as soon as it is possible the horizontal movement of the cross-bar 500 back towards the center of the lateral beam 300 will start, such that the situation displayed in Figure 8F is reached.
  • the following cycle of the process for again transporting a work piece 2 from the first station 10 to the second station 20 will follow as soon as the work piece 2 is ready for transportation.
  • the lateral beam 300 itself was neither lowered nor lifted as a whole during the described process.
  • the lowering and lifting of the cross-bar 500 has been exclusively effected by the pivoting motion of the lateral beam 300.
  • the lift range may be further increased without having to lift the entire lateral beam 300: This is achieved by pivoting the lateral beam 300 beyond its horizontal position during the lifting process and - as soon as the work piece has been removed from the first station - by pivoting the lateral beam 300 back into its horizontal position.
  • each conveyor in the displayed embodiment comprising two support assemblies, two lateral beams and the cross bar
  • each conveyor in the displayed embodiment comprising two support assemblies, two lateral beams and the cross bar
  • the Figure 9 is a schematic illustration of the hand-over of a work piece among two adjacent conveyors 52, 52', in order to flip the work piece.
  • the cross-bar 500 holding the work piece is rotated about 90°, such that the work piece 2 is held upright.
  • the carriages 330, 330' of the two adjacent conveyors 52, 52' are moved near to its neighboring outermost positions, depending on the width of the work piece 2.
  • the cross-bar 500' of the second conveyor 52' is rotated such that its grippers face the grippers of the other cross-bar 500 of the first conveyor 52.
  • the hand-over is enabled: For a short moment, the work piece 2 is held from both sides, until the first conveyor 52 disengages from the work piece 2 and removes the cross-bar 500. By rotating the cross bar 500' of the second conveyor 52', the work piece 2 is again oriented such that it may be introduced into e. g. a press station. However, due to the hand-over as displayed in Figure 9 , the orientation of the work piece 2 has been flipped.
  • the Figure 10 is a perspective view of a conveyor according to the invention, having relocatable support assemblies.
  • the conveyor 52a essentially corresponds to the conveyor 52 displayed in Figures 2-7 .
  • the support assemblies 100a, 200a of the conveyor 52a for supporting the lateral beams 300, 400 are modified such that they are relocatable in a direction transverse to the transport direction.
  • the support assemblies 100a, 200a are supported on two parallel rails 601, 602 extending across the press, running underneath the lower die of the press.
  • the rails 601, 602 extend end-to-end from one support assembly 100a to the other support assembly 200a, constituting a track 600 along which the support assemblies 100a, 200a may be relocated.
  • Both support assemblies 100a, 200a comprise reels or runners on the bottom side of their base plates 103a cooperating with the rails 601, 602. Furthermore, they comprise fixing means for fixing the location of the support assemblies 100a, 200a on the rails 601, 602. If the conveyor 52a is used for transporting work pieces in a press having a pair of dies of a smaller width than the maximum length of the cross-bar 500, the long cross-bar 500 is removed, the fixing means of the support assemblies 100a, 200a are disengaged and the support assemblies 100a, 200a are relocated such that a shorter cross-bar may be used whose length is adapted to the width of the dies. Finally, the relocated support assemblies 100a, 200a are again fixed to the rails 601, 602 at their new positions.
  • the two support assemblies and/or the fixing means may be coupled to each other, e. g. by a chain drive, such that relocating of one of the assemblies leads to an according symmetric relocation of the other assembly and/or fixing of both assemblies happens simultaneously.
  • the adjustment of the distance between the support assemblies may be performed manually or automatically, by correspondingly controlling a drive for moving the support assemblies along the transverse track.
  • FIGS. 11A , B show top views of two positions of a further embodiment of a conveyor according to the invention, having a telescopic drive mechanism featuring an additional linear guideway.
  • the construction of the conveyor corresponds to that of the conveyor discussed in connection with Figs. 1-7 .
  • this further embodiment of the conveyor 52b features a lateral beam 300b having a base part 310b of a reduced length, compared to the embodiment discussed above.
  • the length of the base part 310b just about corresponds to the length of the intermediate carriage 321b.
  • a linear guideway 340b is provided in between the base part 310b and the intermediate carriage 321b.
  • the linear guideway 340b is slidably movable with respect to both its neighboring parts. Its length corresponds to about half the length of the intermediate carriage 321 b.
  • the telescopic drive mechanism 320b which is essentially constructed as described in connection with Figures 5-7 , constitutes a three-stage telescopic drive, i.e. the relative velocity of the carriage 330b, to which a cross-bar may be coupled, with respect to the base part 310b (which does not move horizontally along the press), is apportioned to a first velocity of the linear guideway 340b with respect to the base part 310b, a second velocity of the intermediate carriage 321b with respect to the linear guideway 340b and a third velocity of the carriage 330b with respect to the intermediate carriage 321b.
  • the telescopic drive mechanism 320b is actuated in the same way as in the embodiment discussed above, i.e. employing a rack-and-pinion drive, with the exception that two drives 304.1b and 304.2b are provided for offering better dynamics.
  • the Figure 11A depicts the situation where the carriage 330b is in its central position. In that state, the intermediate carriage 321 b and the linear guideway 340b are as well in their central positions, i.e. symmetrical with respect to the center of the lateral beam 300b.
  • the Figure 11B depicts the outermost position of the carriage 330b with respect to the lateral beam 300b. Almost half of the intermediate carriage 321 b longitudinally protrudes over the base part 310b of the lateral beam 300b.
  • the linear guideway 340b has moved towards the respective end of the base part 310b and is still supporting the intermediate carriage 321 b along its entire length, partially including the portion where the two drives 304.1 b, 304.2b cooperate with the intermediate carriage 321b. Thereby, a stable support of the intermediate carriage 321 b is ensured, especially in the region where the drives 304.1 b, 304.2b exert moments and forces on the intermediate carriage 321b.
  • the path of the carriage 330b is apportioned to relative paths of the linear guideway 340b, the intermediate carriage 321 b and the carriage 330b with respect to their neighboring outer element at a ratio of 1 : 1 : 2, i.e. the absolute paths of the these elements are at a ratio of 1:2:4.
  • the Figure 12 shows a detailed view of a first implementation of the additional linear guideway.
  • the rotary movement of the drive 304.1 b attached to the back side of the base part 310b is transmitted to the intermediate carriage 321 b by means of a pinion 307b attached to a drive shaft 306b of the drive 304.1b cooperating with a rack 308b fixed to and extending along the intermediate carriage 321 b.
  • Two linear guideways 340.1 b, 340.2b are disposed one above the other, in between the base part 310b and the intermediate carriage 321b.
  • Each of the guideways 340.1 b, 340.2b cooperates with two parallel rails 312b, 326b; 313b, 327b attached to the base part 310b and the intermediate carriage 321 b, respectively.
  • the guideways 340.1 b, 340.2b feature monorail bearings 341.1 b, 342.1 b; 341.2b, 342.2b that are known as such in the state of the art.
  • the guideways 340.1 b, 340.2b each comprise a cogwheel 343.1 b, 343.2b that is freely rotatable around a vertical axis, i. e. an axis that is perpendicular to the plane defined by the parallel rails 312b, 326b; 313b, 327b.
  • Each of the cogwheels 343.1b, 343.2b cooperates with two opposed parallel cograils 314b, 328b; 315b, 329b that are parallel to the rails 312b, 326b; 313b, 327b and are fixed to the base part 310b and the intermediate carriage 321b, respectively.
  • the carriage 330b for holding a cross-bar (or other kind of gripping tool) is slidably mounted on the intermediate carriage 321b by means of reels 334b, 335b rotatably mounted to the carriage 330b, running on longitudinal rails 324b, 325b attached to the intermediate carriage 321 b.
  • the carriage 330b is constructed such that its width (i.e. its extension in a direction across the press) is reduced. To achieve this, the carriage 330b extends above the intermediate carriage 321b, such that the drive 331 b for actuating rotary movement of the gripping tool may be attached above the intermediate carriage 321 b, to the back side of the carriage 330b.
  • the movement of the drive 331 b is transmitted to the front side of the carriage 330b by a corresponding transmission 336b.
  • the reduced-width carriage 321 b may as well be employed together with the first embodiment of the invention, discussed in connection with Figs. 1-7 .
  • a belt 322b guided around the intermediate carriage 321 b is fixed to the central portion of the base part 310b.
  • the belt 322b is fixed to the carriage 330b.
  • the belt 322b is freely movable with respect to the intermediate carriage 32 1 b, guided by rollers arranged at both its ends.
  • Figure 12 as well shows two trailing cable installations 350b, 351 b comprising longitudinal conduits attached to the base part 310b and the intermediate carriage 321 b, respectively.
  • a first cable running in the conduit attached to the base part 310b is connected on the intermediate carriage 321 b to a second cable running in the conduit attached to the intermediate carriage 321 b, whereby the second cable is connected to the consumers on or attached to the carriage 330b (i.e. the drive 331 b for rotating the grippers, suction tools etc.)
  • the two cables experience lower forces such that their lifetime is increased.
  • the first embodiment discussed above may be as well equipped with two trailing cable installations as described in connection with the present embodiment.
  • the Figure 13 shows a detailed view of a second implementation of the additional linear guideway.
  • its construction corresponds to those of the implementation discussed in connection with Figure 12 . That is why in the following we concentrate on the differences.
  • the linear guideways 340.1c, 340.2c are of another type, featuring positive control cages 344.1c, 344.2c.
  • Such guideways are commercially available (e. g. INA guideways MVZ of INA-Schaeffler KG or Schneeberger Formula-S guideways).
  • They comprise two parallel rails 345.1c, 346.1c; 345.2c, 346.2c having V-shaped profiles enclosing the central cage 344.1c, 344.2c, which is slidably movable with respect to both the rails 345.1c, 346.1c; 345.2c, 346.2c.
  • Positive control is effected by cogwheels that are rotatably mounted to the cage 344.1c, 344.2c and that cooperate with cograils fixed to the two rails 345.1c, 346.1c; 345.2c, 346.2c of the linear guideways 340.1c, 340.2c.
  • the cage 344.1 c, 344.2c effectively constitutes the first stage of the telescopic drive mechanism 320c whereas the rails 345.1c, 346.1c; 345.2c, 346.2c of the linear guideways 340.1c, 340.2c are fixed to the neighbouring elements, i. e. the base part 310c and the intermediate carriage 321 c.
  • the flexibility of the cross-bar conveyor system is enhanced if the cross-bar is attached to the carriages running along the longitudinal bars in such a way that the two carriages may be independently displaced in horizontal and/or vertical directions.
  • the position and orientation of the cross-bar may be adapted to the form and orientation of the work piece to be picked up or to be deposited.
  • a flexible adaptation of the orientation of the work piece during the transfer process from one station to the next one is enabled.
  • couplings between the carriages and the cross-bar are employed that allow for an incline of the cross-bar in a vertical plane as well as in a horizontal plane. This may be achieved e. g.
  • a compensating mechanism e. g. a telescopic mechanism, is arranged at one of the couplings, at both couplings or along the cross-bar for adapting the effective length of the cross-bar to compensate for the varying distance.
  • a weight compensation mechanism may be provided that compensates the weight differences of the parts of the lateral beam on both sides of the actual pivoting axis, caused by the pivoting motion of the lateral beam.
  • this mechanism may comprise a substantially vertical arm that is rotatably and slidably supported on the support assembly of the conveyor, whereby the rotation axis is located straight above the center of the lateral beam (as long as the beam is in a horizontal position). Across the rotation axis, the arm features a massive element. On the opposite end, the arm is fixed to the center of the lateral beam.
  • the inventive conveyor system is as well appropriate for press lines or multiple-die presses having smaller or larger presses and/or smaller and larger distances between adjacent press stations, e. g. distances of 3-9 m.
  • the employed maximum inclination angle of the lateral beam and the lift range may be correspondingly adapted.
  • the conveyor system is applicable with any number of presses or pairs of dies in a press line or multiple-die press, respectively.
  • the conveyor system may be integrated into a variety of press configurations, e. g. independent of the arrangement of the support for the upper dies or of the press bed.
  • the inventive conveyor system is particularly suited for retrofitting of existing press lines or multiple-die presses but as well for integration into newly built appliances.
  • the telescopic drive mechanism may include other means of driving the intermediate carriage such as a belt drive or a linear induction motor.
  • the path covered by the intermediate carriage relative to the path covered by the carriage attached to the cross-bar may differ if an according gear unit is provided.
  • a telescopic drive mechanism may be omitted and the cross-bar may be directly driven relative to the lateral beam.
  • the arrangement of the lateral beam may be modified as well.
  • the intermediate carriage may rest on the base part or the intermediate carriage may hang down from the base part, i. e. the elements of the drive mechanism may be arranged on top of each other.
  • the rails and guidances between the carriages and the base part may be complemented or replaced e. g. by rolls.
  • the construction may be simplified by omitting the drive and providing a mechanical feed for directly compensating the change of orientation, depending on the incline of the lateral beam.
  • the invention creates a conveyor for transporting work pieces in a press that is of a simple construction, allows for a long transport range and for efficient and fast transport of the work pieces.

Claims (16)

  1. Procédé destiné à transporter des pièces à usiner dans une presse, en particulier une ligne de presse ou une presse à plusieurs matrices, depuis un premier poste (10) jusqu'à un deuxième poste (20) adjacent au premier poste (10), employant une barre (500) attachée à une poutre latérale (300, 400) disposée d'un côté de la presse, s'étendant parallèlement à une direction de transport, comprenant l'étape consistant à positionner la barre (500) au-dessus de la pièce à usiner (2) située dans le premier poste (10), caractérisé par les étapes suivantes consistant à :
    a) abaisser la barre (500) en faisant pivoter la poutre latérale (300, 400) autour d'un axe de pivotement horizontal perpendiculaire à la direction de transport ;
    b) saisir la pièce à usiner (2) par des dispositifs de préhension (502) attachés à la barre (500) ;
    c) soulever la barre (500) en faisant pivoter la poutre latérale (300, 400) autour de l'axe de pivotement ;
    d) transporter la pièce à usiner (2) jusqu'au deuxième poste (20) en déplaçant la barre (500) le long d'une extension longitudinale de la poutre (300) ;
    e) positionner la barre (500) dans une position de transfert en faisant pivoter la poutre latérale (300) autour de l'axe de pivotement ; et
    f) désengager la pièce à usiner (2) des dispositifs de préhension (502).
  2. Procédé selon la revendication 1, caractérisé en ce que le déplacement de la barre (500) le long de l'extension longitudinale de la poutre (300) et le pivotement, c'est-à-dire le soulèvement et/ou l'abaissement des étapes de transport, ont lieu simultanément, au moins en partie.
  3. Procédé selon la revendication 1 ou 2, caractérisé par l'étape supplémentaire de déplacer par rotation les dispositifs de préhension (502) pour au moins compenser un changement d'orientation de la pièce à usiner (2) du fait du pivotement de la poutre latérale (300).
  4. Procédé selon la revendication 3, caractérisé en ce que le deuxième poste (52') est un autre dispositif de transport pour transporter plus loin la pièce à usiner (2), comprenant des deuxièmes dispositifs de préhension, et en ce que le procédé comprend en outre l'étape consistant à déplacer par rotation les dispositifs de préhension de telle sorte que la pièce à usiner (2) maintenue par les dispositifs de préhension puisse être directement transférée aux deuxièmes dispositifs de préhension de l'autre dispositif de transport (52'), en retournant ainsi la pièce à usiner (2).
  5. Dispositif de transport de pièces à usiner dans une presse, en particulier une ligne de presse ou une presse à plusieurs matrices, depuis un premier poste (10) jusqu'à un deuxième poste (20) adjacent au premier poste (10), pour mettre en oeuvre le procédé selon la revendication 1, comprenant :
    a) une première poutre latérale (300, 300b) agencée d'un premier côté de la presse, s'étendant essentiellement parallèlement à une direction de transport du dispositif de transport (52, 52b) ;
    b) au moins une barre (500) ayant des dispositifs de préhension (502) pour saisir la pièce à usiner à transporter, la barre (500) étant attachée à la première poutre latérale (300, 300b, 400) de telle manière qu'elle puisse se déplacer le long d'une extension longitudinale de la poutre (300, 300b, 400) ; et
    c) un ensemble (100) pour supporter la première poutre latérale (300, 300b) ;
    d) l'ensemble (100) comprenant un mécanisme de pivotement (106, 107, 108, 109, 301, 302) pour faire pivoter la première poutre latérale (300) autour d'un axe de pivotement horizontal perpendiculairement à la direction de transport, le mécanisme de pivotement (106, 107, 108, 109, 301, 302) comprenant deux broches (108, 109), les broches (108, 109) étant actionnables indépendamment afin de pivoter et de déplacer de préférence verticalement la poutre latérale (300) ; et
    e) les dispositifs de préhension (502) étant déplaçables par rotation pour au moins compenser un changement d'orientation de la pièce à usiner dû au pivotement de la première poutre latérale (300, 300b, 400) ;
    caractérisé en ce que
    f) la poutre latérale (300) comprend deux accouplements (301, 302) agencés le long de l'extension longitudinale de la poutre latérale (300), chacun des accouplements (301, 302) coopérant avec l'une des broches (108, 109).
  6. Dispositif de transport selon la revendication 5, caractérisé en ce que :
    a) le dispositif de transport comprend une deuxième poutre latérale (400) et un ensemble (200) pour supporter la deuxième poutre latérale (400), comprenant un mécanisme de pivotement pour faire pivoter la deuxième poutre latérale (400) autour d'un axe de pivotement horizontal perpendiculairement à la direction de transport, agencé sur un deuxième côté de la presse en travers du premier côté de la presse, et en ce que
    b) la barre est une barre transversale (500) s'étendant en travers de la presse, attachée aux deux poutres latérales (300, 400).
  7. Dispositif de transport selon la revendication 6, caractérisé en ce qu'au moins l'un des ensembles (100, 200) pour supporter l'une des deux poutres latérales (300, 400) est supporté de telle sorte qu'il puisse être repositionné dans une direction transversale à la direction de transport, afin d'ajuster une distance entre les deux poutres latérales (300, 400).
  8. Dispositif de transport selon l'une quelconque des revendications 5 à 7, caractérisé en ce que le mécanisme de pivotement (106, 107, 108, 109, 301, 302) est formé de telle sorte que l'axe de pivotement coupe un plan vertical comprenant la poutre latérale (300, 400), soit au-dessus, soit en dessous ou à travers la poutre latérale (300, 400), en particulier à proximité d'une portion centrale de la poutre latérale (300, 400).
  9. Dispositif de transport selon l'une quelconque des revendications 5 à 8, caractérisé en ce que l'ensemble (100, 200) comprend en outre un mécanisme de levage (106, 107, 108, 109, 301, 302) pour déplacer la poutre latérale (300, 400) dans une direction verticale.
  10. Dispositif de transport selon l'une quelconque des revendications 5 à 9, caractérisé en ce que les deux accouplements (301, 302) sont agencés symétriquement et à proximité d'un centre de la poutre latérale (300, 400).
  11. Dispositif de transport selon l'une quelconque des revendications 5 à 10, caractérisé en ce que la poutre latérale (300 ; 300b) comprend un mécanisme d'entraînement télescopique (320 ; 320b ; 320c) pour permettre le mouvement de coulissement de la barre (500).
  12. Dispositif de transport selon la revendication 11, caractérisé en ce que le mécanisme d'entraînement télescopique (320 ; 320b ; 320c) est constitué par une poutre de support (310 ; 310b ; 310c) attachée au mécanisme de pivotement (106, 107, 108, 109, 301, 302), un premier chariot (321 ; 321b ; 321c) monté de manière à pouvoir coulisser par rapport à la poutre de support (310 ; 310b ; 310c) et un deuxième chariot (330 ; 330b) monté de manière à pouvoir coulisser par rapport au premier chariot (321 ; 321b ; 321c).
  13. Dispositif de transport selon la revendication 12, caractérisé en ce qu'un guide linéaire intermédiaire (340b ; 340.1b, 340.2b ; 340.1c, 340.2c) est agencé entre la poutre de support (310b ; 310c) et le premier chariot (321b ; 321c), le guide (340b ; 340.1b, 340.2b ; 340.1c, 340.2c) pouvant coulisser par rapport à la poutre de support (310b ; 310c) et aussi par rapport au premier chariot (321b ; 321c).
  14. Dispositif de transport selon l'une quelconque des revendications 5 à 13, caractérisé en ce que tous les entraînements (106, 107, 304) pour déplacer la barre (500) le long des poutres (300, 400) ainsi que pour faire pivoter les poutres (300, 400), sont stationnaires par rapport au déplacement de la barre (500) le long de l'extension longitudinale des poutres (300, 400).
  15. Système de transport pour transporter des pièces à usiner dans une ligne de presse ou une presse à plusieurs matrices, comprenant une pluralité de dispositifs de transport (51, 52, 53, 54, 55) selon l'une quelconque des revendications 5 à 14, agencés les uns derrière les autres.
  16. Système de transport selon la revendication 15, caractérisé en ce que deux dispositifs de transport consécutifs (52, 52') sont agencés de telle sorte que la pièce à usiner (2) puisse être transférée depuis un premier des dispositifs de transport (52) à un deuxième des dispositifs de transport (52'), la pièce à usiner (2) étant retournée.
EP04797267A 2003-11-25 2004-11-25 Convoyeur destine a transporter des pieces a travailler dans une presse Not-in-force EP1689540B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH0300780 2003-11-25
PCT/CH2004/000710 WO2005051563A1 (fr) 2003-11-25 2004-11-25 Convoyeur destine a transporter des pieces a travailler dans une presse

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EP1689540A1 EP1689540A1 (fr) 2006-08-16
EP1689540B1 true EP1689540B1 (fr) 2009-01-14

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EP (1) EP1689540B1 (fr)
JP (1) JP4799418B2 (fr)
KR (1) KR101166724B1 (fr)
CN (1) CN100548527C (fr)
AT (1) ATE420742T1 (fr)
CA (1) CA2545869C (fr)
DE (1) DE602004019139D1 (fr)
ES (1) ES2322473T3 (fr)
MX (1) MXPA06005645A (fr)
RU (1) RU2355579C2 (fr)
WO (1) WO2005051563A1 (fr)

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DE102014117026B3 (de) * 2014-11-20 2015-12-03 Strothmann Machines & Handling GmbH Transfervorrichtung

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ES2322473T3 (es) 2009-06-22
KR101166724B1 (ko) 2012-07-19
CN1898045A (zh) 2007-01-17
CA2545869A1 (fr) 2005-06-09
EP1689540A1 (fr) 2006-08-16
RU2355579C2 (ru) 2009-05-20
JP4799418B2 (ja) 2011-10-26
KR20060115881A (ko) 2006-11-10
RU2006122530A (ru) 2008-01-10
JP2007512138A (ja) 2007-05-17
WO2005051563A1 (fr) 2005-06-09
ATE420742T1 (de) 2009-01-15
DE602004019139D1 (de) 2009-03-05
CA2545869C (fr) 2012-11-13
CN100548527C (zh) 2009-10-14

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