EP0616860B1 - Presse mit einem Tafelanlage- und Vorschubsystem - Google Patents

Presse mit einem Tafelanlage- und Vorschubsystem Download PDF

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Publication number
EP0616860B1
EP0616860B1 EP94103284A EP94103284A EP0616860B1 EP 0616860 B1 EP0616860 B1 EP 0616860B1 EP 94103284 A EP94103284 A EP 94103284A EP 94103284 A EP94103284 A EP 94103284A EP 0616860 B1 EP0616860 B1 EP 0616860B1
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EP
European Patent Office
Prior art keywords
plate
punch
feed
feed device
punching
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 - Lifetime
Application number
EP94103284A
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German (de)
English (en)
French (fr)
Other versions
EP0616860A1 (de
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
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Filing date
Publication date
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Priority claimed from DE19934309949 external-priority patent/DE4309949C2/de
Application filed by Alfons Haar Maschinenbau GmbH and Co KG filed Critical Alfons Haar Maschinenbau GmbH and Co KG
Publication of EP0616860A1 publication Critical patent/EP0616860A1/de
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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working
    • 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
    • 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
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
    • B26D5/32—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier with the record carrier formed by the work itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • 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
    • Y10T83/4463—Work-sensing means to initiate tool feed
    • 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
    • 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
    • Y10T83/4637—With means to guide, position, or present work to work-feed means
    • Y10T83/464—Means to transport work to work-feed means
    • 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
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y10T83/531—With plural work-sensing means
    • 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
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y10T83/536—Movement of work controlled

Definitions

  • the invention relates to a press with a table system and feed system according to the preamble of claim 1 and claim 2.
  • Presses with such a system serve to position sheets, for example made of steel or aluminum sheet, in position to the press, which punches out a predetermined number of blanks from the sheet.
  • suitable feed means which grip a sheet by means of gripping means or other feed means, the sheet is moved step by step through the press and is subjected to a punching step during its standstill.
  • the feed is usually done along two orthogonal axes, because an offset division is selected on the board for the purpose of favorable material utilization.
  • a table system has become known in which a feed carriage has two gripping tongs which grip the table at the rear edge and advance it step by step into the machine tool.
  • the feed is coupled to the movement of the machine tool in such a way that the feed takes place at a time when the tool is not closed and is therefore outside the working plane.
  • the feed carriage returns to an exit or sheet transfer station, where it picks up the next sheet. This is pushed in the correct position by a loading carriage from a table alignment station into the table transfer position, in which the table is located directly in front of the tool.
  • the loading carriage moves under the feed device to bring the sheet metal into the transfer position.
  • the drive for the loading carriage is normally designed so that the loading carriage always brings the sheet into the same sheet transfer position, regardless of its size and the die cut pattern.
  • the gripping means of the feed device laterally gripped on the rear end of a board on opposite sides.
  • the transfer position corresponds to the position of the board in which a first punching stroke is carried out.
  • the transfer takes place from a first feed device or a loading carriage to a second feed device, with which the sheet is advanced for the remaining punching steps. If a single row of tools is used in the press, the gripping means of the second feed device move along two orthogonal ones Axes to be able to make the necessary punchings according to the division of the board.
  • the second feed device need only move the sheets through the press along one axis. It is known to arrange the tools of the two rows offset from one another, for example by arranging the tools of the rear row in the gaps of the tools of the front row.
  • Known pliers and toothed belt systems generally work with two sets of pliers that are moved by toothed belts. While one set is in operation, the other moves back. These systems have to be adapted to every tool set, do not allow precise pre-alignment of the sheet and require a clamping edge and therefore have an increased material consumption.
  • the invention is therefore based on the object of creating a press with a sheet feed and feed system which ensures precise feed and a scrap skeleton with a minimal web width enables without punching and punching on the rear and front edge.
  • the angularity of the front and back edges of a board may not always be correct, i.e. the front and rear edges are not at an exactly right angle to the side edge.
  • at least two sensors are arranged at a distance from one another on a transverse axis which is perpendicular to the feed axis. With the help of the sensors, the deviation of the front or rear edge from the transverse axis is determined. It will be used to determine the correction factor for numerical control. If the deviation from the exact transverse axis is too large, so that punching out is unavoidable, a stop signal can be generated. Alternatively, a punch stroke can also be suspended to avoid punching out faulty die cuts.
  • the front sheet edge passes both sensors.
  • the switch-on edges of both sensors are related to the current position of the feed device. This position can be determined with a resolution of 0.01 mm by the measuring system of the NC control. The further feed can thus be corrected in accordance with the measurement result.
  • the unevenness of the sheet edge can be determined, as already mentioned.
  • the leading edge can be related overall the way to the tool. So it is possible, regardless of the absolute length of the board, to adjust the first punching position while driving so that there is no punching or punching.
  • the adjustment of the first cutting position of the board in accordance with the addressing of the sensors via the path still to be covered by the board serves, given the spacing of the tool row and thus the web width of the remaining grid, to be able to set the upper limit value for the angularity as high as possible. Even with a small web width of 0.98 mm, for example, only a few panels should come to lie above the limit value. The available space between the rows of tools is thus optimally used. If the sheets were moved to a fixed, non-adaptable first control position, a higher value would have to be provided for the web width.
  • the sensors transverse to the feed direction or axis can have a predetermined distance from one another and detect the front and rear edges of a board and emit a corresponding signal.
  • the distance between the sensors is preferably only a little smaller than the width of the panels in order to obtain high measuring accuracy.
  • a setpoint for the length of the sheet is stored in the numerical control.
  • the an actual value for the panel length is calculated for both sensor signals.
  • the exact length of the board can be determined by recording the front or rear edge and the values of the numerical control.
  • very sensitive sensors are required for this. It is therefore proposed according to an embodiment of the invention that they are formed by laser light barriers.
  • the actual length of a table determined in the manner described above is compared with the target value, and a correction value for the subsequent feed steps is calculated from the difference between the target and actual values.
  • the position of the feed device in which the leading edge is detected can be related to a fixed predetermined value which is expected as a result of the previous alignment of the panel at normal panel length. Any deviation from this value indicates a deviation from the nominal board length.
  • the web widths within the board can now be used to correct the overall board length. The determination of the sheet length in the above manner presupposes that the sheet in the alignment station is exactly aligned with respect to its rear and a lateral edge with respect to reference coordinates.
  • the same sensors detect the rear edge of the board in the same way.
  • the same evaluation is carried out as for the front edge, but using the switch-off edges.
  • the angle is checked and the actual distance from the rear edge of the board to the tool is recorded and used to adapt the subsequent punching positions or feed steps.
  • the control for the first feed device must undergo a correction if a changed length has been determined by the sensors and a correction factor has been calculated. If a second feed device is used, which takes over the sheet from a first feed device while it is already in the press, the feed cut lengths are changed similarly if a sheet length deviating from the nominal value has been determined, so that punched-out areas on the front edge of a sheet are avoided will.
  • a stop signal can also be generated if the setpoint / actual value comparison of the sheet length results in an excessively large deviation which would certainly lead to faulty diecuts.
  • the press according to the invention can use two feed devices, the first of which conveys a sheet out of an alignment station, in which the sheet is precisely oriented or aligned with reference coordinates.
  • the board only takes over the second feed device after the press has already carried out two or more punching strokes. In this way you can drive without empty strokes. This means, however, that the sheets are fed to the press without gaps such that the last punching step of a sheet coincides with the first punching step of the next sheet.
  • the board can be guided - precisely aligned - in pliers on the solid, not yet punched-out side of the board during the entire punching process.
  • the last feed path must be carried out by a roller feed. However, since this is only the last step, all necessary corrections can be made beforehand. This means that the last sheet position can be defined by mechanical aids in the tool instead of by the unsafe roller feed.
  • the pliers can be mounted on rigid mounts and moved by spindles so that a high number of cycles is obtained. A clamping edge is not necessary because the feed tongs that hold the board at the end of processing are arranged on the outside.
  • the first feed device can return to the starting position in order to capture a next sheet in the alignment station.
  • the gripping means are sunk during the return stroke in order to avoid a collision with the panel subsequently entering the alignment station.
  • the path that the gripping means of the first feed device have to travel on the return stroke need hardly be more than the length of a table. With the help of conventional drive means, this can be carried out in a sufficiently short time.
  • the return stroke of the second gripping means is relatively short. This also ensures seamless punching operations without idle strokes.
  • the second gripping means of the second feed device cover a particularly short distance if, according to one embodiment of the invention, they laterally grip the panel in the transfer position at the rear end of the panel on opposite sides.
  • the sheet Before the gripping means of the first feed device grips a sheet, the sheet must be arranged exactly with respect to reference coordinates. This is done in the alignment station. Naturally, the board must be brought into the alignment station by means of a suitable funding.
  • a third feed device is used for this purpose, which transports the sheet from a loading station to the alignment station.
  • the third feed device has two parallel conveyor belts driven by separate numerically controlled third adjustment drives, each with a driver.
  • the drivers are arranged so that one is behind a board and the other in front of a board.
  • the front driver which is a plate to the alignment station has first brought into engagement with the front edge of the next table, for which it may even have to be moved back again.
  • the rear driver which engages on the rear edge of the next panel, it then conveys the panel into the alignment station. Only when this process has been completed does the front driver return with the circulation of the conveyor belt and now becomes the rear driver for transporting a further panel in the direction of the alignment station.
  • the separately driven conveyors therefore allow the panel to be fed quickly and precisely to the alignment station, with the leading driver acting as a stop in the braking phase.
  • a press 10 is indicated in FIGS. 1 and 2, the tools of which are arranged in two rows 12 and 14.
  • the front row 12 seen in the feed direction 16 has five tools, while the rear row 14 has four tools which are arranged in the gaps of the front tools 12.
  • the tools are actuated simultaneously with a single punching stroke in order to punch out the front panel 18 shown in FIG. 1, which results in circular diecuts and a so-called residual grid 20.
  • a first feed device 22 has two gripping tongs 24, 26 with which the scrolled panel 18 is grasped at the rear edge.
  • the tongs 24, 26 are arranged on an arm of a slide 30 which can be adjusted in the feed direction 16 along guides 32 with the aid of a first adjustment drive 34.
  • the gripping tongs 24, 26 can also be adjusted in height so that they do not interfere with a subsequent panel, such as panel 36, on the return stroke.
  • a second feed device 38 has a carriage 40, which can also be adjusted in the feed direction 16 along guides 42.
  • the feed drive 44 is used for this purpose.
  • the carriage 40 supports two arms 46, 48 (only the arm 46 is shown in FIG. 1 for reasons of clarity.
  • the first feed device is not shown in FIG. 2 with the exception of the gripping tongs 24, 26).
  • second gripping tongs 50, 52 are attached, which grip the panels laterally at the rear end.
  • the plates are placed on two parallel sliding surfaces 56, 58 by a template device, not shown, which extend to the press 10.
  • Figs. 1 and 2 there is a table 60 in a feed station 70.
  • Two parallel narrow conveyor belts 62, 64 extend between the sliding surfaces 56, 58 and can be driven independently of one another by a third drive (not shown).
  • Each conveyor belt 62, 64 has a driver 66, 68. It can be seen that a driver or cam 66 engages the rear edge of a panel 60, while a front driver or cam 68 is located on or in front of the front edge of the panel 60.
  • the board 60 is conveyed from the feed station 70 to an alignment station 72, in which the board 36 is located.
  • Alignment station 72 is shown separately in FIG. 3 to indicate that alignment means (not shown) are panel 36 against two place side stops 74, 76 and a rear stop 78. Such alignment means are generally known.
  • laser light barriers 80, 82 are indicated in the front area of the positioning station 72 and 84, 86 in the rear area.
  • the light barrier pairs 80, 82 and 84, 86 have a predetermined distance from one another.
  • the light barriers of a pair 80, 82 and 84, 86 lie on a transverse axis extending perpendicular to the feed axis 16.
  • a pair of light barriers alone, e.g. 80, 82 fulfilled all necessary functions.
  • the feed device places a board 60 on the surfaces 56, 58 in the delivery station, and the driver 66 of the conveyor belt 64 conveys the board 60 to the alignment station 72, possibly progressively with the advancement of the board 36 from the alignment station in the direction of the press 10.
  • the alignment takes place in the alignment station 72 the panel 36 using the alignment means, not shown, along two orthogonal axes.
  • the second feed device 38 pushes the sheet 18 through the press 10 with the aid of the gripping tongs 50, 52.
  • the feed of the sheets 36, 18 and the feed devices 22 and 38 are coordinated via the numerical control so that the last punching the panel 18 coincides with the first die cut of the panel 36, as shown in FIG. 2.
  • the last punching of the sheet 18 is done by the tool row 12 and the first punching of the new sheet 36 by the tool row 14. The transition therefore takes place without an idle stroke of the press 10.
  • the gripping tongs 50, 52 are released and the carriage 40 can move back into an initial position, as shown in FIG. 1.
  • the gripping tongs 24, 26 of the first feed device 22 take over the feed of the sheet 36 through the press 10 for a number of punching steps, for example two or more. Therefore the grippers need 50, 52 to make only a relatively short return path before the takeover, as can be seen from the comparison of FIGS. 1 and 2.
  • the feed of the board 18 for the first part of the punching steps takes place with the gripping tongs 24, 26 drawn with solid lines.
  • the transition to the second feeding device 38 takes place by the gripping tongs 24, 26 opening and the gripping tongs 50, 52 close. This transition takes place during a punching stroke, ie immediately during the engagement of the tools with the board, since the board is in a fixed position and its position therefore does not change.
  • the second feed device 38 then carries out the remaining feed steps until the empty residual grid can be removed by an ejection device, not shown, for example a driven pair of rollers.
  • FIGS. 1 and 2 are a numerical control 90 for the press shown in FIGS. 1 and 2 shown. It is in operative connection with the sensors 80, 82. Motors 92, 94 drive the first feed device 22 and the second feed device 38 in a known manner.
  • a frequency converter 96 or 98 is used, which is connected to a resolver 100 or 102, which outputs a signal corresponding to the frequency of the motor 92, 94 to the frequency converter 96, 98.
  • the latter are also given signals which are generated by the numerical control 90. This is done in accordance with the program stored in the numerical control 90 taking into account signals from the sensors 80, 82, which will be discussed further below.
  • the front edge of the board 36 crosses the two laser light barriers 80, 82.
  • the deviation of the front can respectively.
  • the rear edge of a board can be determined from a transverse axis. This is done in the numerical control 90, in which a correction factor can also be calculated. If the deviation from the exact transverse axis is too large, so that punching out a leading edge, for example, would be unavoidable, a stop signal can also be generated in order to avoid punching out faulty die cuts.
  • the table 36 When driving forward, for example, the table 36 passes the front edge of both light barriers 80, 82.
  • the switch-on edges of the light barriers are brought into relation to the current position of the feed device 22. This position can be detected by the measuring system of the numerical control 90 with a minimum resolution of, for example, 0.01 mm.
  • the further feed by the motors 92, 94 can thus be corrected in accordance with the measurement result.
  • the front edge of the board can be brought into relation to the distance still to be covered up to the first tool row 14 of the press 10. So it is possible, regardless of the absolute length of the board, to adjust the first punching position while driving so that there is no punching or punching out.
  • the adjustment of the first cutting position of the panel in accordance with the addressing of the light barriers 80, 82 via the path still to be covered by the panel serves, given the spacing of the tool row 14 and thus the web width of the residual mesh, to enable the upper limit value for the angularity to be set as high as possible . Even with a small web width, only a few panels should be above the limit. The available space between the rows of tools 14, 12 is thus optimally used. If the sheets were moved to a fixed, non-adaptable first control position, a higher value would have to be provided for the web width.
  • the length of the board and thus the deviation from a desired length can be determined by detecting the front and rear edges of a board by means of the light barriers 80, 82 or by the further light barriers 84, 86.
  • the target length can be stored in the numerical control 90. It then determines a correction value for the feed.
  • the actual length of the table 36 determined in the numerical control is compared with a stored nominal length. For example, if the sheet 36 is slightly shorter than the desired length, the numerical control of the feed by the first feed device 22 must ensure that the sheet 36 is pushed far enough into the press that the first punching step, as shown in Fig. 2 , a web remains at the front edge of the board 36, otherwise faulty die cuts are produced. Therefore, the numerical control calculates a correction value from the deviation of the target and actual length of the sheet in order to correct the feed path or the length of the feed steps accordingly, so that faulty die cuts are not produced. The same applies to the advancement of the front panel 18 by the second feed device 38. If the panel is too short, an incorrect punching could occur at the rear end of the panel 18 occur.
  • Appropriately corrected feed of the feed device 38 between the punching steps ensures that a web also remains at the rear edge. This can be done, for example, in that each of the feed steps 38 carried out by the feed device 38 is a little shorter than originally programmed, as a result of which the webs between the punchings are also somewhat narrower. Overall, however, a certain length is "gained" which ensures for the last punching step that punched-out or punched-out parts do not appear on the rear edge. If only the front light barriers 80, 82 are used, the sheet length can also be determined by detecting the rear sheet edge, or the remaining sheet length still available for the remaining stamping steps, in order then to be able to carry out a feed correction in the manner described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Punching Or Piercing (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Registering Or Overturning Sheets (AREA)
EP94103284A 1993-03-26 1994-03-04 Presse mit einem Tafelanlage- und Vorschubsystem Expired - Lifetime EP0616860B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4309949 1993-03-26
DE19934309949 DE4309949C2 (de) 1993-03-26 1993-03-26 Tafelanlage- und Vorschubsystem für Pressen

Publications (2)

Publication Number Publication Date
EP0616860A1 EP0616860A1 (de) 1994-09-28
EP0616860B1 true EP0616860B1 (de) 1997-10-22

Family

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EP94103285A Expired - Lifetime EP0616861B2 (de) 1993-03-26 1994-03-04 Presse mit einem Tafelanlage- und Vorschubsystem
EP94103284A Expired - Lifetime EP0616860B1 (de) 1993-03-26 1994-03-04 Presse mit einem Tafelanlage- und Vorschubsystem

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EP94103285A Expired - Lifetime EP0616861B2 (de) 1993-03-26 1994-03-04 Presse mit einem Tafelanlage- und Vorschubsystem

Country Status (5)

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US (2) US5577427A (ja)
EP (2) EP0616861B2 (ja)
JP (2) JP3650417B2 (ja)
DE (2) DE59404380D1 (ja)
ES (2) ES2111786T5 (ja)

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Publication number Priority date Publication date Assignee Title
JP3442590B2 (ja) * 1995-11-20 2003-09-02 株式会社アマダ パンチング加工機およびその加工方法
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JP3650417B2 (ja) 2005-05-18
EP0616861B1 (de) 1997-12-17
US5878640A (en) 1999-03-09
EP0616861A1 (en) 1994-09-28
EP0616861B2 (de) 2000-09-27
ES2109528T3 (es) 1998-01-16
ES2111786T3 (es) 1998-03-16
DE59404798D1 (de) 1998-01-29
DE59404380D1 (de) 1997-11-27
JP3653108B2 (ja) 2005-05-25
ES2111786T5 (es) 2000-12-16
US5577427A (en) 1996-11-26
EP0616860A1 (de) 1994-09-28
JPH06297060A (ja) 1994-10-25
JPH06297059A (ja) 1994-10-25

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