EP0650780A1 - Mécanisme d'entraînement pour un appareil de transfert, notamment pour une presse de transfert - Google Patents

Mécanisme d'entraînement pour un appareil de transfert, notamment pour une presse de transfert Download PDF

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Publication number
EP0650780A1
EP0650780A1 EP94115058A EP94115058A EP0650780A1 EP 0650780 A1 EP0650780 A1 EP 0650780A1 EP 94115058 A EP94115058 A EP 94115058A EP 94115058 A EP94115058 A EP 94115058A EP 0650780 A1 EP0650780 A1 EP 0650780A1
Authority
EP
European Patent Office
Prior art keywords
drive
press
advancing mechanism
housing
movement
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.)
Granted
Application number
EP94115058A
Other languages
German (de)
English (en)
Other versions
EP0650780B1 (fr
Inventor
Erich Harsch
Rainer Reichenbach
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.)
Mueller Weingarten AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten 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
Application filed by Maschinenfabrik Mueller Weingarten AG, Mueller Weingarten AG filed Critical Maschinenfabrik Mueller Weingarten AG
Publication of EP0650780A1 publication Critical patent/EP0650780A1/fr
Application granted granted Critical
Publication of EP0650780B1 publication Critical patent/EP0650780B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to a transfer drive, in particular for a transfer press according to the preamble of claim 1.
  • the transport device for transporting parts in a transfer press consists of gripper rails which, in addition to the longitudinal and lifting movement, carry out an additional transverse movement, gripper elements being provided on the gripper rails themselves.
  • the basic idea of such systems is that the workpieces or parts have to be transported from stage to stage of the press without the transport elements being in the tool room during the actual machining process. With the three-dimensional transfer system, the gripper rails must be moved laterally out of the tool room.
  • each gripper rail is articulated by means of a push rod on a slide which can be displaced transversely, the slide being able to be displaced transversely into a fixed starting position in order to adapt to the respective workpiece size.
  • the respective closing movement of the gripper rail then takes place as a lateral pivoting movement or transverse movement on a carriage which is fixed in the transverse direction by means of corresponding ball joints.
  • the cross-slidable slides themselves are attached to a cross-beam, which are connected to the gear housing of a press drive via conventional drive levers.
  • the gearboxes are stationary in the front area or input area of the step press and contain the usual cam disks that are driven by rollers to carry out the advancing, tensioning and lifting movement of the mounting rails, the gearbox being driven from the press head.
  • a basic illustration of such a drive for a pair of gripper rails is given in EP 0 210 745 A2 (FIG. 4).
  • the invention has for its object to reduce the amount of moving masses as much as possible in order to obtain a simplification of the construction and thus savings in manufacturing costs and operating costs. A significant reduction in transfer drive power is also contemplated.
  • the main idea of the drive device according to the invention is that the individual movements of the gripper rail are analyzed and corresponding movement sequences are optimized with regard to movable masses. For example, if one starts from the subject of DE 38 42 182 C1, the sequence of movements of the transverse movement or closing movement of the gripper rails is divided into the usual transverse pendulum movement of the gripper rail between a fixed slide and the gripper rail via a push rod that can be pivoted back and forth.
  • the further movement of each gripper rail relates to an adjustability (width adjustment) of the starting position of the slide on a crossbar, to a basic setting of the slide depending on the workpiece size or type adjust.
  • the slide for mounting a push rod for each gripper rail can therefore be adjusted on a crossbar in a position that is at the maximum outside or at the inside from where the respective closing movement of the respective gripper rail is carried out.
  • this adjustability of the set-up axes requires the structural effort of the crossbar with the associated drive for the slides assigned to the gripper rails.
  • the mass of the crossbar must also be moved with each working stroke.
  • the invention provides for decoupling these motion sequences in order to save masses that are unnecessarily moved.
  • the invention is based on the main idea that the adjustability of the gripper rail in its respective workpiece-dependent starting position is achieved by technical means that are not involved in the current work cycle. This is done according to the invention by shifting the required lateral adjustment movement into the drive housing of the drive gear. If the entire gear is consequently moved into the required, workpiece-dependent middle position, the drive lever protruding from the drive gear and pivotable in the longitudinal direction can be connected directly to the respective gripper rail via an associated push rod. The push rod articulated between the drive lever and the gripper rail then enables the usual gripping or closing movement of the gripper rail. As a result, all intermediate elements contained in known devices, such as. B. the driver crossbar to carry out the adjustment of the set-up axis.
  • the adjustment of the transmission housing as a whole has the advantage that considerably less moving masses have to be moved during operation of the gripper rails due to the lack of components. This gives a high saving of Manufacturing and operating costs. Since the transfer systems also require considerable acceleration and deceleration values, a significant reduction in the transfer drive power is also possible by reducing the moving masses.
  • the drive gear with corresponding cams, eccentrics and / or gear wheels or direct coupling can be driven by the central drive of the press itself or by its own drive motor.
  • the latter decouples the ram drive of the press from the drive system of the gripper rail.
  • a powerful electrical or electronic control for electrical coupling or for synchronizing the press with the transfer drive is then required.
  • the first exemplary embodiment shown in FIGS. 1 to 3 comprises a large-part step press with a plurality of processing stations 2 arranged one behind the other, each of which is assigned a lower tool 4 arranged on a table 3 and an upper tool 5 fastened to a press ram 6.
  • the press rams 6 are connected to associated head pieces 7 of the press, which are supported by lateral press stands 8.
  • each gripper rail 9, 10 serves to transport the workpieces to be deposited in the processing stations, pass through the press stages.
  • each gripper rail 9, 10 performs a horizontal longitudinal movement (arrow 15) forwards and backwards by means of an associated advancing mechanism 11, 12.
  • a lifting mechanism 13 for carrying out a vertical or lifting movement (arrow 16) of each gripper rail and a tensioning or closing mechanism 14 for carrying out a transverse movement or closing movement of each gripper rail (arrow 17) are provided.
  • the gripper rail can thus carry out a three-dimensional transport movement, that is to say the two gripper rails 9, 10 move synchronously into the tool space after the machining process has been completed with the tool space open (clamping or closing movement), grasp the workpiece and lift it off the lower tool by means of the lifting movement.
  • a subsequent longitudinal movement of the Gripper rails transports the lifted workpiece to the subsequent processing station or an intermediate stage, where it is placed on a lower tool, for example.
  • the subsequent transverse movement of the two gripper rails outwards leads out of the press chamber so that the ram with the upper tool can move down onto the lower tool without being disturbed.
  • the stroke movement of the press ram 6 must be precisely coordinated with the workpiece transport via the gripper rails 9, 10. Accordingly, in the exemplary embodiment according to FIGS. 1 to 3, the advancement, lifting and tensioning mechanisms 11 to 14 are driven via the drive of the press, in particular an eccentric wheel 18, which at the same time serves to drive the press rams 6.
  • the drive arranged in the head piece 7 of the press thus represents a forced synchronization with the advance, the lifting and the tensioning mechanisms 11 to 14 together.
  • the countershaft transmission 20 which can be seen in particular in FIGS. 1 and 2, consists of a first gearwheel 21 driven by the additional transmission 19, from which two horizontally extending countershafts 22, 22 'laterally lead into the drive housing 23, 23' of the two advancement mechanisms 11, 12 and there with a second gear 24, 24 'are connected.
  • the two advancement mechanisms 11, 12 within the respective drive housings 23, 23 ' are constructed in mirror image, however, so that the advancement mechanism 11 is described below.
  • the second gearwheel 24 connected to the countershaft 22 is connected within the transmission of the advancement mechanism to a third gearwheel 25 which is connected to a central one Shaft 26 is mounted.
  • Various cam disks 27, 28 are located on the shaft 26 and are picked up by associated rollers 29, 30.
  • a shaft 31, which is also mounted in the drive housing, serves to mount a drive lever 32, the pivoting movement of which in a vertical plane 33 is controlled by the cams 27, 28 by an angle ⁇ .
  • the structure of the advance mechanism 11, 12, i.e. H. the gear arrangement within the drive housing 23, 23 'with drive gears or complementary curves corresponds to the usual state of the art.
  • the lifting mechanism 13 arranged on the side of the drive housing 23 ' is driven by the countershaft 22' which is guided through and extended through the drive housing 13, the gear arrangement 34 being designed within the gear housing 35 of the lifting mechanism in a manner known per se.
  • a mechanical lever connection 36 leads from the gear housing 35 to the lifting and closing box 37, which carries out the combined lifting and closing movement of the gripper rails 9, 10.
  • the tensioning and closing mechanism 14 arranged on the right of the drive housing 23 in FIG. 1 is likewise driven via the countershaft 22 extended by the drive housing 23.
  • the gear arrangement 39 arranged within the gear housing 38 is in turn connected to the combined lifting and closing box 37 via a lever connection 40.
  • the peculiarity of the arrangement is, in particular, as shown in Fig. 1, that the entire housing 23, 23 'of the respective advancement mechanism 11, 12 can be moved laterally by an amount l1, so that the vertical plane 33 of the drive lever 32, 32' is displaceable in the position 33 'shown in FIG. 1.
  • This The entire housing 23, 23 ' is displaced by means of a displacement drive 41 as is shown in more detail in FIG. 1.
  • the displacement drive 41 comprises a hydraulic or preferably electric drive motor 42 which acts via a deflection gear 43 on two drive shafts 45 arranged in the vertical plane of symmetry 44.
  • a deflection gear 43 on two drive shafts 45 arranged in the vertical plane of symmetry 44.
  • At a distance l2 are at the lower end of the drive shaft 45 and at the upper end of the drive shaft 45 'each another deflection gear 46, 46' from which two drive shafts 47, 47 'in the lower area and 48, 48' in the upper area branch off to the side.
  • the shafts 47, 47 'and 48, 48' also lie in a vertical plane 49 (see FIG. 2) which is perpendicular to the symmetry vertical plane 44.
  • the drive shafts 47, 47 'and 48, 48' are formed at least over a distance l 1 corresponding adjustment range as a threaded spindle, each of which cooperate with a spindle nut 50 on the side walls 51 of the drive housing 23, 23 '. 1, the spindle nuts 50 interacting with the lower drive shafts 47, 47 'can be seen in the housing wall 51.
  • the spindle nuts interacting with the upper drive shafts 48, 48 ' are covered by the central shaft 26 of the respective gear arrangements, but are equally present.
  • the slopes of the threaded spindles 47, 47 'and 48, 48' are designed in opposite directions. Accordingly, if the drive 42 is actuated, the threaded spindles 47, 47 'and 48, 48' rotate in the same direction, so that the drive housing 23, 23 'in the direction of the closing movement (arrow 17) inwards or outwards in opposite directions Direction can be shifted. The lateral housing wall 51 then comes into the dot-dash position 51 'in the innermost or to be in the retracted position of the drive housing 23, 23 '. Likewise, the drive lever 32, 32 'moves into the position of its vertical plane indicated by 33'.
  • the upper countershafts 22, 22 'shown in Fig. 1 are formed as spline shafts on which the respective drive housing 23, 23' can move laterally by the amount l1.
  • the two outer drive housings 13, 14 remain stationary in their position for the lifting mechanism or the tensioning or closing mechanism.
  • the drive lever 32, 32 ' is connected to the gripper rails 9, 10 via a push rod 52, 52' only shown in FIG. 1 and shown in FIGS. 2 and 3.
  • each gripper rail 9, 10 can then perform the lateral closing movement shown in FIGS. 1 and 3, the respective push rod 52, 52 'being pivoted by the angle ⁇ (see FIG. 3). In the arrangement according to FIG. 3, therefore, the closing movement of the gripper rail 9 into position 9 ', the closing movement of the gripper rail 10 into position 10'.
  • the respective drive lever 32, 32 ' when the set-up axis is set, the respective drive lever 32, 32 'remains in its initial position, so that it can be connected directly to the respective gripper rail 9, 10 via the respective push rod 52, 52'.
  • FIGS. 4 to 6 differs from the first embodiment of the invention according to FIGS. 1 to 3 essentially only in that the drive for the advance mechanism 11, 12 via a separate motor drive 54, 55 for the two associated gripper rails 9, 10 takes place. Otherwise, the same parts are identified by the same reference numerals as are described in the first exemplary embodiment.
  • the drive for the advancing mechanism is also shown here as an example.
  • the separate motor drives 54, 55 result in an independent drive for the three-dimensional movements of the two gripper rails 9, 10.
  • the electrical drives 54, 55 act directly on a gear 57 via their drive pinions 56, that performs the pivoting movement of the associated drive lever 32, 32 'about the axis 31, 31' by the angle ⁇ .
  • the gear 57 can also be designed as a gear segment in order to effect the pivoting movement of the drive lever 32, 32 '.
  • the drive lever 32, 32 ' is in turn connected to the respective gripper rail 9, 10 via a push rod 52, 52'.
  • FIG. 6 Another construction variant is shown in FIG. 6, where the drive motors 54, 55 for the advancing mechanism are connected directly to the axis 31, 31 '.
  • each drive housing 23, 23 ' is fastened to a guide rail 58, 58' arranged on the end face of the press, which is perpendicular to the longitudinal axis of the press in a vertical plane.
  • Each drive housing 23, 23 ' has a guide carriage 59 which allows the drive housing 23, 23' to be displaced transversely with the drive 54, 55 flanged on. 5 shows an upper and lower slide guide 59, 59 'for the respective drive housing.
  • the lateral displaceability in the transverse direction again takes place by means of a central electric drive motor 42 'located on the vertical center plane of symmetry, which acts via a deflection gear 43' on two laterally projecting drive shafts 60, 60 ', which lead as threaded spindles to the two drive housings 23, 23' and there are engaged with associated spindle nuts 50. Due to the opposite slope of the threaded spindles 60, 60 ', the drive housing 23, 23' are laterally shifted by the amount l1 in the dashed position shown in Fig. 4, the respective drive motor 54, 55 in the position 54 'or 55' moves .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP94115058A 1993-10-28 1994-09-23 Mécanisme d'entraînement pour un appareil de transfert, notamment pour une presse de transfert Expired - Lifetime EP0650780B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4336853A DE4336853A1 (de) 1993-10-28 1993-10-28 Transferantrieb, insbesondere für eine Transferpresse
DE4336853 1993-10-28

Publications (2)

Publication Number Publication Date
EP0650780A1 true EP0650780A1 (fr) 1995-05-03
EP0650780B1 EP0650780B1 (fr) 1997-08-06

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EP94115058A Expired - Lifetime EP0650780B1 (fr) 1993-10-28 1994-09-23 Mécanisme d'entraînement pour un appareil de transfert, notamment pour une presse de transfert

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EP (1) EP0650780B1 (fr)
DE (2) DE4336853A1 (fr)
ES (1) ES2105456T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007004720U1 (de) * 2007-03-30 2008-05-21 Settele, Wilhelm Kurvengetriebe mit zwei Abnahmerollen, sowie Stanz-Biege-Maschine mit einem solchen Kurvengetriebe
DE102007015467B4 (de) 2007-03-30 2015-02-05 Wilhelm Settele Kurvengetriebe mit zwei Abnahmerollen, Verfahren zur Herstellung eines derartigen Kurvengetriebes, Programm zur Durchführung der Schritte des Verfahrens, sowie Stanz-Biege-Maschine mit einem solchen Kurvengetriebe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3426255A1 (de) * 1984-07-17 1986-01-23 L. Schuler GmbH, 7320 Göppingen Vorrichtung zur aenderung der lage des schliess-oeffnen-hubes der greiferschienen einer transferpresse
DE3624416A1 (de) * 1985-07-19 1987-01-22 Toyota Motor Co Ltd Vorrichtung zur zufuehrung eines werkstueckes zu einer presse und zur herausfuehrung desselben aus der presse
DE3842182C1 (fr) * 1988-12-15 1989-09-28 Maschinenfabrik Mueller-Weingarten Ag, 7987 Weingarten, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3426255A1 (de) * 1984-07-17 1986-01-23 L. Schuler GmbH, 7320 Göppingen Vorrichtung zur aenderung der lage des schliess-oeffnen-hubes der greiferschienen einer transferpresse
DE3624416A1 (de) * 1985-07-19 1987-01-22 Toyota Motor Co Ltd Vorrichtung zur zufuehrung eines werkstueckes zu einer presse und zur herausfuehrung desselben aus der presse
DE3842182C1 (fr) * 1988-12-15 1989-09-28 Maschinenfabrik Mueller-Weingarten Ag, 7987 Weingarten, De

Also Published As

Publication number Publication date
DE4336853A1 (de) 1995-05-04
EP0650780B1 (fr) 1997-08-06
ES2105456T3 (es) 1997-10-16
DE59403629D1 (de) 1997-09-11

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