DE1962104A1 - Cutting tools in the form of rotating rolling tools - Google Patents

Description

It ßchnittwerkzeuge in the form of rotating rolling tools The invention refers to cutting tools in the form of rotating rolling tools, which from rollers or rolls with stamps and corresponding dies for punching of recesses in material that can be stiffened during the passage, esp. for the production of roller shutter slats.

Such cutting tools for so-called. Roll cuts are known. For this are two rollers or rollers of the same size, their axes when the material passes through horizontally perpendicular; are arranged one above the other and which on the circumference with the Rollschnltt; interlocking punches or dies occupied; are used. Here finds; a large number of such pairs of elements (punches and dies) with relative large diameters of the rollers or rollers over the Scope distributed Use. So far, large rollers or. Rolling (eg knife chosen to be a Alignment of the proportions to achieve the vertical punching and with the To keep engagement and cutting conditions manageable. This results in however, a great deal of cutting tools, which are set up very precisely to one another must be in order to avoid contact between the cut edges. Even When regrinding, the known designs are accordingly complex and expensive.

These disadvantages are now, inter alia, with the cutting tools according to the invention fixed in the form of rotating rolling tools that the stamp of one Punching rolls are shortened at least at their front and rear cutting edges so that that this when rolling over the continuous between the two roles, punchable Do not immerse the material in the associated dies of the other punching roll.

Here, the end faces of the stamps are expediently bulged, esp. in the form of a circular cylindrical surface with opposite the radius of the front and rear cutting edges v * »smaller radius. This can also be used for shortened Cut edges the punched-out material is removed from the dies; in the other case ejecting devices known per se can be installed for this purpose.

That which occurs easily with roll cuts and is caused by friction The punchable material goes up at the incision when the The stamp is made by the shortening of the cutting edges according to the invention largely eliminated. According to the invention, this can be improved by a Acceleration of the rolling tools during the roll punching process, especially with the respective Extending the punch from the punchable material, with the increased speed of the rollers with the immersion of the follower punch in the punchable material again is reduced. Also, only the stamp roller can accelerate the roll punching process Finally, the bending of the material to be punched through can be used be avoided at the beginning of the roll punching process that the die roll is offset with respect to the stamp roller, such that in the punchable material immersing punch, the material is already in contact with the die roll.

Further details of the invention are then given with reference to the drawing and specifically show: FIG. 1 to 7 schematic views of the invention Embodiments.

In the first embodiment of FIG. 1 is a male barrel 1 shown with stamps 2, which is a sodium roller 3 with Schltzausnehmungen 4 is assigned. The material pin 5 runs between the two punching rollers 1, 3, for example for the production of roller shutter slats, through which punched slots 6 are generated. In FIG. 1 a, for example, a strip piece 5 with a punched slot 6 is shown.

According to the invention, when you roll over the dive between the two Punch rolls 1 and 3 continuous material strip 5 the punch 2 of the die roll 1 during the roll punching process not into the slot recesses 4 of the die roll 3 a.

This is a time-consuming adjustment of the stamp 2 in the Manufacturing and regrinding of such patrix rollers are avoided and it can also there is no longer any mutual damage to the cut edges when the synchronism both punching rolls 1 and 3 varied by little things.

In the second exemplary embodiment according to FIG. 2, the stamps 2 are on their end faces bulged at 7, esp.

in the form of a circular cylindrical surface with opposite the radius of the front and rear cutting edges with reduced radius.

Here, too, the front and rear cutting edges are the stamps 2 so shortened that this when rolling over the between the two punching rollers 1 and 3 passing material 5 do not intervene in the associated slot recesses 4, while the recesses 7 intervene and thereby act as an ejector for the punched material can serve.

In the third exemplary embodiment according to FIG. 3, there is such a ratio selected from the distance a of the punch 2 to the diameter d of the rolling tools 1 and 3, that only one punch 2 in engagement with the punchable material 5, i.e. for Attachment of the punched slot 6 is available. Otherwise possible deadlocks Displacements or indentations on the material 5 avoided during the roll punching process.

These undesirable phenomena can also be largely eliminated are due to an acceleration of the scrollwork eye during the roll punching process, inßbes. each time the stamp is extended from the punchable material, with only the stamp roll can experience an acceleration. This increased Circulation speed the roles is expediently reduced again with the immersion of the following punch into the punchable material, i.e. the braking effect is advantageously the same implemented in cutting power.

In the fourth exemplary embodiment according to FIG. 4, the die roll is 3 opposite the stamp roller 1 offset by the piece b, so that in the punchable Material 5 dipping punch 2, the material 5 is already in contact with the die roll 3, as is clear from the drawing. Thus, the material is next to the punch slots not pressed down, as is usually the case, causing undesirable material deformations brings with it.

In the fifth embodiment of Figure 5 is finally one Male roller 1 shown with punches 8, the punch axes in the direction of passage are inclined by the angle g, so that there is preferably one on the inlet side Undercutting of the cut surface results in a pushing away of the material 5 prevented at the beginning of the roll punching process, ie this is illustrated in the drawing will.

In Figure 6 it is then shown how punch 2 and dies 4 by means of Carrier 9,10 on the bearing rollers 11 or 12, e.g. through Screw are mounted interchangeably at c, the gears 13, 14 for synchronism care for. This makes it easy to change the rolling tools for different ones Punch cuts or even for regrinding achieved without using the machine for long periods Time would have to be stopped.

Finally, in Fig. 7 it is shown how the punchable material is in shape a belt 15 runs around the sodium roller 16, with two male rollers 1?, 18 with Stamp 19.20 are provided. As can be seen in the overlapping Achieve dense cutting sequences 21 cut. However, such a design is suitable only for flexible or pliable strip material 15. This results in material stiffening during the cut as well as a shortening of the punch engagement during the punching process, what on both is desirable.

Claims (9)

Patent claims: Cutting tools in the form of rotating rolling tools, which are made from Rollers or rolls with punches and corresponding dies for punching There are recesses in punchable material during the run, especially for Manufacture of roller shutter slats, characterized in that the stamp of the one Punching rolls are shortened at least at their front and rear cutting edges so that that this does not occur when rolling over the material passing through between the two rollers dip into the associated dies of the other punching roll. 2. Cutting tools according to claim 1, characterized in that in each case the end faces of the punches are bulged, in particular in the form of a circular cylinder surface with a smaller radius than the radius of the front and rear cutting edges. 3. Cutting tools, in particular. According to claim 1, characterized in that that such a ratio of the punch distance to the diameter of the rolling tools it is chosen that only one punch is in engagement with the punchable material. 4. Cutting tools, in particular. According to claim 1, characterized by an acceleration of the rolling tools in the roll punching process, especially in the respective Moving the punch out of the punchable material, 5. Cutting tools according to claim 4, characterized in that only the stamp roller accelerates the Roli * ang process learns. 6. Cutting tools according to claim 4 or 5, characterized in that that the increased speed of the roll (s) with the immersion of the following punch is reduced again in the punchable material. 7. Cutting tools, in particular. According to claim 1, characterized in that that the die roller is offset from the stamp roller, such that in in the punchable material is dipped into the punch, the material already from the natrize roll is present. 8. Cutting tools, in particular. According to claim 1, characterized by Inclination of the ßempelachaen in the direction of passage, such that preferably on the inlet side results in an internal cut of the cut surface. 9. Cutting tools, in particular, according to one of the preceding claims, characterized in that the punches and / or dies are interchangeable on one sit on the rollers attachable carrier. lOo cutting tools, in particular according to one of the preceding claims, characterized in that the punchable material is in the form of a tape around the die roll runs and if necessary a die roll cooperates with several punch rolls. Blank page