DE20315726U1 - Bending press tool is fabricated of a series of layers of different profile - Google Patents

Abstract

A bending press tool has a clamped interface (1.1), a spacer or form-memory section (1.2) and a bending tip (1.3). The tool is esp. fabricated of laminated layers (1). The layers are of the same or different planform. The lamella are of different length in the direction of press action.

Description

The invention relates to a bending tool, preferably as upper and / or lower tool for press brakes, with clamping sections, distancing or shape-saving sections and forming sections, Consisting of a package of individual, flat-to-face contact Lamellae.

The invention is preferably used for Bending parts on press brakes, where a special Position fixation during the Bending process and / or a special, irregular shape can be achieved should.

From the DE 44 09 556 A1 is a bending tool, in particular for the die bending of sheet metal parts, in the form of a bending punch and / or a die, which consists of a package of separate lamellae, which are strung together in the direction of the bending axis of the tool and joined together to form a package.

The disadvantage of this bending tool is that it only for the manufacture of parts is suitable along the bending axis have a constant shape. The cross section to the bending axis along the same is therefore translation invariant, i. H. it changes not when looking along the bending axis. It is also a backup of the parts to be bent against movement along the bending axis not possible.

The invention is based on the object Specify bending tool with which to fix the position of the to be bent Parts during of the bending process and / or an irregular shape of the to be bent Parts inexpensively possible is.

According to the invention, the object is achieved with an arrangement which contains the features specified in claim 1, solved.

Advantageous configurations are in the subclaims specified.

On the bending tool according to the invention advantageous that a fixation of the parts to be bent during the Bending process and / or a special, irregular shape of the to be bent Parts possible is.

It is also advantageous that a continuous formation of shape courses possible without gradations is. Tools of any length with complicated shapes are possible.

In addition, the bending tool according to the invention can be used as an upper and / or lower tool.

It is also advantageous that through the fixation of the position and the possible manufacture of several parts one less expensive in one stroke Production can take place.

The invention is illustrated below of an embodiment explained in more detail.

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1 a single lamella of a bending tool,

2a 2 shows a schematic, side view of the forming section of a bending tool according to the invention transverse to the bending axis with stepped lamella narrow sides

2 B 2 shows a schematic, side view of the forming section of a bending tool according to the invention transverse to the bending axis with approximately continuous narrow slat sides,

3 2 shows a schematic, three-dimensional representation of an application of bending tools according to the invention with an irregular shape of a sheet,

4 is a schematic, three-dimensional representation of an application of a bending tool according to the invention for bending a tube with movement protection.

A laminated bending tool consists of packages of individual lamellae 1 in again 1 . shown The slats 1 consist of the clamping section for an upper tool 1.1 , the distancing or shape-saving section 1.2 and the forming section 1.3 ,

According to the invention, the various lamellae within a tool package can have different contours in the three sections. The contours are preferably left in the clamping section 1.1 identical for optimal power transmission and varies the contours in the forming section 1.3 as in 2a indicated or in the distancing or shape-saving section 1.2 ,

For There are similar options for sub-tools.

In 2 B are the contours of the forming section 1.3 also varies, as opposed to 2a are the narrow sides of the slats 1 however, reshaped so that there is an approximately continuous course of the surface of the reshaping section 1.3 results. This reshaping can be achieved, for example, by chamfering the narrow sides, but smooth, curvilinear gradients are also possible, for example, using the design as Bezier curves.

An example with upper and lower tools for irregular shaping of a sheet 2 is in 3 shown. There are only three slats for a better understanding 1 of the two tools. The forming sections of the slats 1 of a tool have different contours, the mutually facing sides of the upper and lower tools have mutually complementary contours, so that the workpiece 2 is flat against the tool at every point during pressing.

4 shows the case of a recessed slat 3 in a lower tool, with the workpieces 4 can be bent in the width of the depression, for example round rods or tubes, and at the same time are secured against lateral movements. Of course, several slats can also be used for this purpose 3 stand back when the dimensions of the workpiece 4 require this. The workpiece is shown in the form 4.1 before bending and 4.2 after bending.

By backwards accordingly Slats also allow the processing of wire mats.

By arranging several backwards of individual slats or groups of slats, which are not caused by backwards or the above slats or slat groups are separated, Is it possible, several workpieces to process in one stroke. This also applies to one-piece workpieces that are shaped differently in different zones and only after bending into several parts.

It is also conceivable that the slats behind 3 have different contours in their forming sections, so that special design and movement security are combined.

As an example of a special shape can also the production of teardrops serve, where the upper and lower tools mainly form a flat surface and elliptical, tapering recesses in the lower tool and corresponding protruding elements in the upper tool similar to Molds are available.

The formation can of course also vice versa from bottom to top or vice versa, in which the forming sections of the upper and lower tools are reversed be designed.

LIST OF REFERENCE NUMBERS

1

lamella

1.1

clamping section

1.2

distancing or shape-saving section

1.3

Umformsektion

2

sheet

3

receding lamella

4

workpiece

4.1

in front bending

4.2

to bending

Claims (5)

Bending tool, preferably as an upper and / or lower tool for press brakes, with clamping sections ( 1.1 ), distancing or shape-saving sections ( 1.2 ) and forming sections ( 1.3 ), consisting of a package of individual, mutually flat slats ( 1 ), Characterized in that single or several or all lamellae ( 1 ) have a different design. Bending tool according to claim 1, characterized in that the lamellae ( 3 ) have different lengths in the pressing direction, the distancing or shape-storing sections and / or the forming sections of one or more lamellae ( 3 ) compared to those of neighboring slats ( 1 ) stand back or stand out. Bending tool according to claim 1 or 2, characterized in that individual or groups of adjacent lamellae ( 1 ) different contours across the pressing direction in their distancing or shape-saving sections ( 1.2 ) exhibit. Bending tool according to one of the preceding claims, characterized in that individual or groups of adjacent lamellae ( 1 ) different contours in their forming sections across the pressing direction ( 1.3 ) exhibit. Bending tool according to one of the preceding claims, characterized in that the narrow sides of the fins ( 1 ) along the direction of the bending axis, a section-wise or completely continuous or approximately continuous surface of a distancing or shape-saving section ( 1.2 ) and / or forming section ( 1.3 ) form.