Method and punching apparatus for producing cutting lines with apertures

(42) Date of commencement of the patent: 15. 6.1995 (45) Date of issue: 25. 1. 1996 (56) Documentation:

(73)

Patentee:

DE 3125770A AT 392749B US 4336007A DE 3500520A US 4994975A ​​GB 2174635A

US 5033342A

BÖHLER YBBSTALWERKE GES.MBH

A-3333 BÖHLERWERK, LOWER AUSTRIA (AT).

(5 4) METHOD AND PUNCHING DEVICE FOR PRODUCING CUTTING LINES WITH REMOVAL

CD

AT 400 545 (57) The invention relates to a method and a punching device for the economic production of cutting lines (1) with recesses or gaps (11). It is intended in that the starting material (1) is held at at least one point before and after the processing region (32) and at each of these at least at one point before and after the punching tool (31) a force in the feed direction (x) is acted on for a short time in succession and thereby the starting material is moved step by step, wherein in dependence on the punch movement (z) in the tool, the feed parameters of the cutting line starting material from a computer (4) according to a stored or available program and input data (41) is controlled, wherein a controlled feed (x) of the starting material (1) with or ^{in front} Introduction dess Elben in the punching or processing area (32) performed and maintained until the recesses (11) having band or rod-shaped cutting line has been completely discharged from the punch. A punching device according to the invention is characterized in that the feed device (2) and the punching unit (3) for the cutting line (1) with an electronic computing, storage and control unit (4) in connection (42,43,44) are.

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I® 0073315

AT 400 545 Β

The invention relates to a method for producing cutting lines, which in the cutting area and / or in the cutting opposite support area recesses or Have gaps, for example, perforating lines, rotation lines and the like., Where a band or rod-shaped cutting line pre-material in the longitudinal direction thereof gradually in a punching or Processing area is advanced and in the starting material, i m substantially transversely to the longitudinal extent on one side or both sides, recesses or Gaps are punched. Furthermore, the invention relates to a punching device for producing cutting lines, which in the cutting area and / or in the opposite support area recesses or Have gaps for a processing of sheet material, such as paper, cardboard, films and the like., Preferably perforating lines, in particular rotation lines, consisting essentially of a feed device and a punching unit, in particular for carrying out the method.

Cutting lines are thin, sharpened and thereby a cutting edge having steel bands which are bent according to a desired cutting line or a cutting pattern used in a die or connected to a carrier and thus form a cutting tool for sheet material. The sheet material can paper, sealing material, leather, plastic film and the like in a single od he be multi-layered execution.

If, for example, in the production of box blanks with impressible openings, separating tabs and the like, if necessary, additional perforated areas as well as up, tear or tear zones are to be introduced into the sheet material, then interrupted cuts must be made or be provided in the cutting tool interruptions of the cutting line cutting edge. Such cutting lines are referred to in a conventional manner by the expert as perforating lines, Riil cutting lines, corrugated or tear lines and have in the cutting area recesses or Gaps or interruptions with cutting curvatures.

For a processing of eg Continuous materials, such as continuous paper in roll or lay form, for example, computer paper and the like, are also rotating, so circular in cross-section, tools used. For the creation of such a shaped tool, however, they must use Both cutting lines usually bent upright, be installed in a rotatable die or the like. An edgewise bending of a so-called rotation line is made possible by the fact that recesses or gaps in the region opposite the cutting edge, ie the support region of the cutting line, in the die or in the carrier, are incorporated.

According to the broader field of application cutting lines are required with a variety of Ausnehmungsformen and dimensions, wherein the recesses or gaps may be introduced by punching or grinding. If an example from US-PS 4336007, US-PS 5033342 and GB-PS 2174535 known punching provided for a production of special cutting lines, so a large number of punching tools with different Stempeiformen be in stock to create a respective desired gap shape can. This means a large stock of tools, associated with high Ze expenses for their installation and removal in or from the punching device, which are associated with low Einzelherstellmengen of special cutting high cost and low cost. However, if the recesses or gaps are made by grinding, inventory and the cost of the required grinding tools are lower, but the time spent on machining and the labor and equipment costs are much higher. Nevertheless, when a small quantity of special cutting lines is required, machining by grinding can be more economical than punching. Both manufacturing methods, however, the disadvantage of a large end waste and associated additional end processing together, because each unprocessed clamping lengths or Supply areas are required on starting material and allow this no secure insertion of recesses.

The invention sets itself the goal of eliminating the disadvantages of the known types of processing and to provide an improved method for the production of special cutting lines, with which, especially in an application of a punching, high efficiency can be achieved even with small production quantities. Furthermore, the invention has for its object to provide a punching device with low tooling costs for a largely waste-free processing of cutting lines.

The goal is achieved in a method of the type mentioned in that the starting material at each at least one point before and after the punching or Held processing area and this act at least at one point before and after the punching tool synchronously a force in the feed direction for a short time consecutively act and thereby progressively advanced the starting material or is moved, depending on the Stempeibewegung or the respective punching stems in the tool, a period of time for an interruption and a degree of gradual movement or the feed parameters of the cutting line starting material from a computer according to a Speichicher2

AT 400 545 B or the available program and data is controlled and a controlled feed of the

Starting material with or before the introduction of the same carried out in the punching or processing area and is maintained until the recesses having band or rod-shaped cutting line has been completely discharged from the punch.

In a generic device, the object of the invention is achieved in that the feed device by at least one in the feed direction before and after the punching tools arranged, the cutting line holding and / or moving transport is formed and the transport means are formed of paired Förderwaizen, wobe i at least one roller in front of and behind the Stanswerkzeugen by one or more drives synchronously movable or is rotatable and the feed device and the punching unit for the cutting line with a programmable electronic computing, storage and control unit in connection.

Further advantageous embodiments or embodiments of the invention are characterized in the subclaims.

The advantages achieved by the invention are in particular that with the new method and small lots or small Schneidiinienmengen in a special version extremely economically produced, because the movement of the cutting line pre-material is controlled in a Kleinstanzeinrichtung by means of an electronic computer with stored programs. For secure feed movement, to increase the reliability of the device and the improved accuracy of the formation of the gaps in the cutting line, it is inventive It is important to hold them on both sides of the punching tool and / or to move them with precisely defined steps. It has also proved to be particularly advantageous in terms of avoiding end waste and compliance with a required cutting edge region arrangement in the tool, when doing a controlled feed of Vormaterials with or before introducing the same in the punching or Machining performed and maintained until the recesses having band or rod-shaped cutting line has been completely discharged from the punch.

If, as further provided in a favorable manner, the production of a recess or gap of a cutting line by two or more than two working or punching strokes, wherein the required width of the recess at intersecting punching surfaces by the extent of each feed step and the number of Die cuts controlled electronically can, with one or a few tool mold (s) any recess or Gap width at the Schneidkanten- and / or Rückenbzw. Support side of the cutting line are created.

In order to achieve a favorable bendability in Hochkantrichtung the cutting line and a good dimensional stability, especially for rotational lines, it may also be advantageous if the formation of special shapes of the recesses or gaps and for a cutting in addition or superimposed or only a movement of the holder with the cutting line relative, substantially perpendicular to the feed direction, is electronically controlled. In a simple manner are thereby formed to the longitudinal extent inclined formed boundaries of the gaps or cutting line ends.

A particularly favorable embodiment of a punching device according to the invention of the type mentioned is achieved in particular with regard to a high reliability of the device, w hen the feed device is formed by at least one each in the feed direction before and after the punching tools arranged, the cutting line holding and / or moving transport. It has also proven to be important that the transport means are formed of paired conveyor rollers, wherein at least one roller before and behind the punching tools by one or more drives synchronously movable or is rotatable. In a stamping device designed in this way, it is possible to insert the primary material, if necessary until it stops, exactly and to move through the processing zone with the feed parameter unchanged without end-of-fall. Thereby, and by the measure that the feed device and the punching unit for the cutting line with a programmable electronic rake, storage and control unit are in communication, it is possible even with small batches or short cutting lines, high efficiency of the ore to reach an opium.

If, as advantageously provided according to a further variant of the device, the cutting line in the punching or processing area, in particular the feed device with retracted or retracted punching or cutting punch in the tool, perpendicular to the feed direction in a direction preferably perpendicular thereto transverse direction relative to the punching tools controlled sliding, virtually all Ausnehmungs- or gap shapes can be made.

Preferably, the width of the recesses or the gap width and its basic shape and a cutting of the cutting line by controlling the relative movements feed and / or transverse offset to the tool during punching, optionally taking into account the generation length by an input to a keyboard of the electronic arithmetic, memory and control unit, adjustable. This is

AT 400 545 Β set the punching device quickly and easily lbar, resulting in an advantageous, cost and time-saving applicability for the production of various and short special cutting lines results.

In the following the invention will be explained in more detail with reference to schematic drawings showing only one embodiment. It shows

1 shows a punching device in side view

2 shows the punching device in plan view

3 shows a production of recesses in the cutting area

4 a cutting and

5 shows a preparation of special forms of gaps in a cutting line

1 shows a punching device for producing special cutting lines 1, wherein this is moved by a feed device 2 by means of two pairs of driving rollers 21, 21 'and 22, 22' in the feed direction x through a region with punching tools 31, 32. A cutting line advance is effected by a synchronous, rectified, stepwise rotation 211, 221 of FIG Roll pairs 21,21 'and 22,22' accomplished, with a stable guidance of a primary material 1 in the processing area is achieved by a pre-and Nachordnung of at least one driven roller per pair of rotors. An electronic computing memory and control unit 4 is connected to a punching stamp moving device 33 by, for example, signal lines 43 and determines a pitch and movement of a punch 31 in the tool 32nd A movement 211,221 of the pairs of drive rollers 21,21 'and 22,22' is controlled by the arithmetic unit 4, wherein suitable transmission means 42, 44 for control can also return control signals. The arithmetic unit is in a simple manner, for example by a keyboard 41, programmable, whereby, as illustrated in Figure 2, a distance between recesses 11 in a cutting line 1 and a recess width and recess shape can be produced or are controllable. In the plan view (Fig.2) of a punching device is a to the feed direction x vertical further movement direction y for a cutting line pre-material 1 relative to the processing area 32 shown. Such, optionally additional, controllable movement y of a starting material 1 in the processing area can be carried out in the most favorable way by shifting an entire cutting line feed device 2 with a drive 23 of conveying rollers 21, 22.

From Figure 3 is a production of recesses 11 with a larger width in the cutting area of ​​a

Cutting line 1 schematically represented by a so-called nibbling. In this case, after a first punching a stepwise feed x of a cutting line pre-material 1 corresponds to a smaller extent than the width of a cutting punch 31, each punching 31 'controlled.

In Figure 4 is a cutting to length of a cutting line 1 by creating a recess 11 with a

Successive punching represented by a controlled displacement ung or line 1 in y direction from the punch 31 accomplished a continuous separation. 7 shows a cutting line 1 with a V-shaped recess 11, which is produced by a so-called nibbling at a movement controlled relative to the punch simultaneously in the feed direction x and in the transverse direction y.