EP0178376B1 - Appareil d'avance pour introduire et pousser en avant des plaques dans une machine-outil - Google Patents

Appareil d'avance pour introduire et pousser en avant des plaques dans une machine-outil Download PDF

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Publication number
EP0178376B1
EP0178376B1 EP85105305A EP85105305A EP0178376B1 EP 0178376 B1 EP0178376 B1 EP 0178376B1 EP 85105305 A EP85105305 A EP 85105305A EP 85105305 A EP85105305 A EP 85105305A EP 0178376 B1 EP0178376 B1 EP 0178376B1
Authority
EP
European Patent Office
Prior art keywords
feeding
machine tool
guide
positioning station
feed
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.)
Expired
Application number
EP85105305A
Other languages
German (de)
English (en)
Other versions
EP0178376A3 (en
EP0178376A2 (fr
Inventor
Thomas Dipl.-Ing. Haar
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.)
Alfons Haar Maschinenbau GmbH and Co KG
Original Assignee
Alfons Haar Maschinenbau GmbH and Co KG
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 Alfons Haar Maschinenbau GmbH and Co KG filed Critical Alfons Haar Maschinenbau GmbH and Co KG
Priority to AT85105305T priority Critical patent/ATE36128T1/de
Publication of EP0178376A2 publication Critical patent/EP0178376A2/fr
Publication of EP0178376A3 publication Critical patent/EP0178376A3/de
Application granted granted Critical
Publication of EP0178376B1 publication Critical patent/EP0178376B1/fr
Expired 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
    • B21D43/10—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
    • B21D43/003—Positioning devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/445—With work-moving clamp jaw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/463—Work-feed element contacts and moves with work
    • Y10T83/4632—Comprises a work-moving gripper

Definitions

  • the invention relates to a feed device for inserting and feeding sheets into a machine tool, with a feed slide, which has a gripping device for gripping an edge of the sheets and which is adjustable along a first guide by means of a first feed drive, a second guide, the axis of which runs orthogonal to the axis of the first guide and along which the first guide can be adjusted by means of a second feed drive, a positioning station in which the panels are successively positioned with respect to the orthogonal axes, a transfer path between the machine tool and the positioning station and an automatic control device which controls the working strokes Machine tool detected and the feed drives controlled synchronously with the working strokes.
  • Such a device is known (US-A-4382394 or DE-U-8318201). It is used to position sheets, for example made of aluminum, in a positioned position in a press that punches out a predetermined number of blanks from the sheet. For this purpose, the board is clamped in a feed device and moved between the punching tools. The movement normally takes place along two orthogonal axes, since an offset division is selected for the purpose of favorable material utilization.
  • the feed carriage can be moved along the first guide with the aid of a spindle drive.
  • the first guide can be moved along the second guide with the aid of a further spindle drive.
  • the feed carriage has two gripping tongs that grasp the sheet at the rear edge and advance it step by step in the machine tool.
  • This feed is coupled with the movement of the machine tool, for example a punch, in such a way that the adjustment takes place in a time in which the tool is outside the working plane during the return stroke and the working stroke.
  • the loading carriage After a work cycle for a sheet has ended, the loading carriage returns to a starting position in which it grips the next sheet of metal. This sheet of metal was pushed in the correct position into the loading position by a loading carriage from a positioning station.
  • the loading device contains a loading carriage which has gripping means for gripping the sheet metal plate, the loading carriage moving under the feed device in order to bring the sheet metal plate into the loading position.
  • the loading device is designed in such a way that the loading carriage always reaches the loading position at the same point, regardless of the size of the metal sheet and the die-cut pattern, so that the metal sheet also has a predetermined starting position.
  • the invention is therefore based on the object of providing a feed device for inputting and advancing sheets into a machine tool, in which the sheets can be processed without the machine tool being idle.
  • first guides extend between the positioning station and the machine tool and each guide a feed slide with gripping device and each have a first feed drive in that both first guides are guided by the second guide and by a separate second each Feed drive are adjustable, and that the control device controls the feed drives belonging to the feed carriages in such a way that the board is advanced into the first machining position in the machine tool before the machine tool carries out a further work stroke for the previous board after the last working stroke.
  • a charging device is not required in the device according to the invention. While a first feed slide feeds a sheet in the machine tool, the second loading slide can fetch the next sheet from the positioning station in order to feed it into the machine tool as soon as the previous sheet is finished, for example, all blanks have been punched out. Since the feed drives for each slide naturally have to be synchronized with the movement of the machine tool, it is also easily possible, for example with the aid of suitable numerical controls, to bring the subsequent sheet metal into the first machining position after the last working stroke has been carried out on the previous sheet has been. Since the stroke frequency is constant and known, the loading carriage can be controlled in such a way that it correctly feeds the sheet from the positioning station into the first processing position after the last working stroke has ended and before the new working stroke is carried out.
  • control device is designed in such a way that the feed carriage follows the board in the transfer section in synchronism with the feed movement of the preceding board in the other feed carriage. This can be done in such a way that the waiting table is moved very close to the processed table, for example at a distance of 1 mm, and the waiting table tracks all movements of the table in the machine tool, so that the alignment and the distance between the panels is always maintained.
  • the invention has four axes.
  • a special their transfer device for example in the form of a loading carriage or the like, is omitted.
  • the novel construction of the device according to the invention makes it possible to eliminate any change times, ie each stroke of the machine tool is a working stroke.
  • an increase in production of up to 30% is achieved.
  • the parallel first guides run in a direction that coincides with the direction in which the plates are moved out of the positioning station in the direction of the machine tool.
  • the associated first guide of the tool slide can move it out of the collision area with the sheet brought up by the other loading slide when it is moved to the positioning station.
  • a relative height adjustment as is required in the known device with regard to the feed and loading carriage, is not required.
  • the single figure shows a plan view of the highly schematic feed device according to a preferred embodiment of the invention.
  • a punch 10 the upper part of which has been left out for reasons of illustration, has three punching tools, which are indicated by thick solid lines 11. They are used for punching out circular blanks 12 from a metal sheet 13 shown in dot-dash lines.
  • the punch 10 is of a known type and is not to be explained in detail. The necessary ejection device is also not shown.
  • a slide-in device 14 there is a stack of sheets which is raised step by step with the aid of a lifting device, not shown.
  • the topmost sheet of metal is inserted into the gap between the insertion rollers of a coating device 15 with the aid of a plurality of vertically adjustable suction heads.
  • the sheet of metal falls from above onto a machine table, not shown.
  • Two first stops 16, 17 and a second stop 18 are assigned to the machine table.
  • a positioning drive not shown, places the board in the positioning station against the stops 16 to 18 in order to bring it into a predetermined position with respect to predetermined X and Y coordinates.
  • Such a device is known for example from US-A-4382395.
  • the guides support feed carriages 23 and 24, which each have two gripping tongs 25, 26.
  • the guides extend from the positioning station to the punch 10 and somewhat beyond, as can be seen from the drawing.
  • a second guide 27 is arranged in a stationary manner and carries feed drives 28, 29 at the opposite ends.
  • the second guide 27 supports the guides 19, 20 approximately centrally for adjustment in the X direction.
  • Various drives are conceivable for adjusting the feed slides 23, 24, for example via spindles, cable pulls, belts and the like.
  • a preferably numerical control controls the individual drives and operating sequences in a completely automatic manner.
  • a sheet of metal is conveyed from the insertion device onto the work table, and the sheet of metal is brought into a predetermined starting position with the aid of the positioning drive and the stops 16 to 18.
  • the gripping tongs 25, 26 of the loading carriage 24 have gripped a metal sheet 13 on the left edge (seen in the Y direction) and move the sheet in individual steps along the X and Y axes through the punch 10, which successively remove blanks 12 from the Cut out plate 13.
  • the carriage 23 had already moved into the positioning station in order to grip a positioned panel with its pliers 25, 26 on the right edge.
  • the position or the position of the slide 23 must be defined by the tongs 25, 26.
  • the carriage 23 brings the picked-up sheet close to the processed sheet (middle of the three dash-dotted sheets in the drawing).
  • the feed drives are controlled in such a way that the board in the ready position synchronously tracks the movements of the foremost board 13 in the punch 10.
  • the feed carriage 23 moves the picked sheet into the first processing position.
  • the drive 29 moves the feed slide 24 together with the finished sheet out of the tool area.
  • the feed carriage 24 then moves back with the second guide withdrawn so that its tongs 25, 26 do not hit the new board in the positioning station; the recording of the new board is indicated by dash-dotted lines.
  • a transmitter must be provided in order to determine their movement sequence. This can be done, for example, by detecting the crankshaft rotation of the punch 10 (Z axis).
  • the feed stroke of the table 13 in the punch 10 is derived from the crankshaft rotation. It also determines the time at which the new sheet must be in the first processing position so that the new sheet can be punched out without an idle stroke. Since the metal sheets are precisely positioned in the positioning station and received in a predetermined position by the feed slides 23 or 24 the distances traveled from the positioning station to the first processing position in the punch are also fixed.
  • the numerical control can therefore control every feed movement from the positioning station to the punch.
  • the new plate can initially remain in the positioning station, and the assigned feed slide can be controlled so that the correct starting time is calculated from the positioning station and the plate is moved directly to the first processing position.

Claims (2)

1. Appareil d'avance pour introduire et pousser des plaques (13) en avant dans une machine-outil (10), comprenant un chariot d'avance (23, 24), qui comporte un dispositif de saisie (25; 26) pour saisir un bord des plaques (13) et qui est déplaçable, le long d'un premier guide (19, 20), au moyen d'un premier moyen d'avancement, un deuxième guide (27) dont l'axe est orthogonal à celui du premier guide (19, 20) et le long duquel le premier guide (19, 20) peut être déplacé au moyen d'un deuxième moyen d'avancement (28, 29), un poste de positionnement, où les plaques (13) sont successivement mises en place relativement aux axes orthogonaux, une voie de transfert entre la machine-outil et le poste de positionnement, et un dispositif de commande automatique qui détecte les déplacements de travail de la machine-outil (10) et qui commande les moyens d'avancement en synchronisme avec le mouvement de la machine-outil, caractérisé en ce que deux premiers guides parallèles (19, 20) s'étendent entre le poste de positionnement et la machine-outil (10), chacun porte un chariot d'avance (23, 24) comportant un dispositif de saisie (25, 26), et inclut un premier moyen d'avancement, en ce que les deux premiers guides (19, 20) sont guidés par le deuxième guide (27) et peuvent chacun être déplacés par un deuxième moyen d'avancement propre (28, 29), et en ce que le dispositif de commande commande les moyens d'avancement appartenant à un chariot d'avance (23, 24), de façon que les plaques soient poussées en avant dans la première position de travail de la machine-outil (10), avant que la machine-outil (10) n'ait exécuté, après la dernière course de travail sur la plaque précédente, une nouvelle course de travail.
2. Appareil selon la revendication 1, caractérisé en ce que le dispositif de commande est établi de telle façon que l'un des chariots d'avance (23, 24) fait suivre les plaques (13) dans la voie de transfert en synchronisme avec l'avancement de la plaque précédente (13) dans l'autre chariot d'avance (24, 23).
EP85105305A 1984-10-13 1985-05-02 Appareil d'avance pour introduire et pousser en avant des plaques dans une machine-outil Expired EP0178376B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85105305T ATE36128T1 (de) 1984-10-13 1985-05-02 Vorschubvorrichtung zum eingeben und vorschieben von tafeln in eine werkzeugmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3437642A DE3437642C2 (de) 1984-10-13 1984-10-13 Vorschubvorrichtung zum Eingeben und Vorschieben von Tafeln in eine Stanze
DE3437642 1984-10-13

Publications (3)

Publication Number Publication Date
EP0178376A2 EP0178376A2 (fr) 1986-04-23
EP0178376A3 EP0178376A3 (en) 1987-01-14
EP0178376B1 true EP0178376B1 (fr) 1988-08-03

Family

ID=6247859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85105305A Expired EP0178376B1 (fr) 1984-10-13 1985-05-02 Appareil d'avance pour introduire et pousser en avant des plaques dans une machine-outil

Country Status (9)

Country Link
US (1) US4691817A (fr)
EP (1) EP0178376B1 (fr)
JP (1) JPS6195728A (fr)
AT (1) ATE36128T1 (fr)
AU (1) AU574502B2 (fr)
CA (1) CA1242068A (fr)
DE (2) DE3437642C2 (fr)
DK (1) DK159532C (fr)
ES (1) ES8607074A1 (fr)

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Also Published As

Publication number Publication date
US4691817A (en) 1987-09-08
DK159532B (da) 1990-10-29
DK466785D0 (da) 1985-10-11
DK159532C (da) 1991-04-02
ATE36128T1 (de) 1988-08-15
DK466785A (da) 1986-04-14
DE3437642C2 (de) 1994-03-31
DE3564084D1 (en) 1988-09-08
DE3437642A1 (de) 1986-04-17
AU4710485A (en) 1986-04-17
EP0178376A3 (en) 1987-01-14
ES8607074A1 (es) 1986-06-01
ES545082A0 (es) 1986-06-01
EP0178376A2 (fr) 1986-04-23
AU574502B2 (en) 1988-07-07
CA1242068A (fr) 1988-09-20
JPS6195728A (ja) 1986-05-14

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