DE1777184C3 - Sheet metal cutting device - Google Patents

Description

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The invention relates to a sheet metal cutting device which is mounted on a sheet metal feed table fixed lower cutter and an upper cutter mounted on a pivoting bar as well as a having transverse knife arranged perpendicular thereto.

With most of the sheet metal cutting devices of the above construction, sheets can only be cut along one edge get cut. For example, if a rectangular sheet is cut to a certain size is to be, the raw sheet is fed into the device and the first edge is cut.

Then the sheet is rotated 90 °, cut again and so on, until all four edges are tailored.

These devices have the following disadvantages: It takes a lot of time to turn the sheet, Furthermore, there is a risk of damage when turning several times, e.g. B. by scratching, and Finally, there is the possibility that the cutting angle if the sheet metal is improperly inserted into the Machine is no longer exactly 90 °.

From US-PS 14 16 800 is a further sheet metal cutting device became known, by means of which square sections from a sheet metal along the Edges can be cut off. This device has a fixed bottom knife with a cross knife and a movably mounted upper knife also available with a transverse knife, the upper knife with the Cross knife is accommodated in a frame, which is opposite to the lower knife in a vertical position Direction and is movable against the action of a spring. This facility is only suitable for the production of small sections from a sheet of metal.

In contrast, the invention is a generally applicable and for cutting large Sheet metal pieces suitable sheet metal cutting device proposed, which is extremely fast and accurate Cutting of rectangular sheets permitted

The device is characterized in that the transverse knife around the axis of the pivotable beam in a vertical plane perpendicular to the cutting plane of the upper knife and arranged to be pivotable adjustable guide elements is guided laterally

Such a sheet metal cutting device is very simple in construction, takes up little space and has the additional advantage that the cross knife remains free and is accessible from the side where the cut piece falls down The two Knives, the transverse and the longitudinal knife, can be used either separately or together as a unit be operated.

The transverse knife acting as an upper knife can preferably be positioned on a lateral extension of the The axis of rotation of the swivel beam can be pivoted.

Furthermore, the two upper knives can be pivoted independently of one another and individually and each through a separate actuator can be operated.

In the drawings, an embodiment of the subject invention is shown, namely shows

F i g. 1 a schematic view of the proposed device from above,

Fig. 2 shows a section along the line AA in Fig. 1 and

Fig. 3 shows a section along the line Ä-ßinFig. 1.

The proposed sheet metal cutting device has a sheet metal feed table 1 into which a first Lower knife 2 and a second lower knife 3 is arranged at right angles thereto. Furthermore, there is a two axes 5 and 6 pivotable bar 4 is provided, which has a first upper cutter 7. on an extension 8 of the axis 6, a second upper cutter 9 is pivotably mounted. The upper knife 7 cooperates with the lower knife 2 and the upper knife 9 with the lower knife 3.

The two pairs of knives are standing there. one mechanical, electrical or hydraulic each, not shown Drive member in connection.

The upper knife 9 is laterally guided with guide members 10, 10 'and 10 "and 11 and 1Γ, which Management bodies are adjustable.

In order to cut a sheet metal in the form of a rectangle, the following operations are now necessary: The Raw sheet is fed into the sheet metal cutter and both pairs of knives are made at the same time actuated. Two adjacent sheet metal edges are thus cut at right angles at the same time. Then it will be the sheet metal pulled out, rotated around a diagonal and again with both pairs of knives at the same time cut. The sheet metal can therefore be cut square with two cuts by turning it once. Furthermore, z. B. a long sheet metal can be pushed through the device, with the a pair of knives is cut one longitudinal edge while the resulting sheet metal strip is cut with the other Pair of knives can be cut into pieces without the need to remove the sheet metal from the facility take out and reinsert in a different direction. In this case, the two will Knife pairs operated independently of each other.

For this purpose 3 sheets of drawings

Claims (3)

Patent claims: 1. Sheet metal cutting device, which has a bottom knife fixed on a sheet metal feed table with a transverse knife and an upper knife mounted in a pivoting bar as well as a vertical one has arranged transverse knife, characterized in that the transverse knife (9) around the axis (5,6) of the pivotable bar (4) in a plane to the cutting plane of the upper knife (7) vertical vertical plane pivotable and adjustable by means of adjustable guide elements (10, 10 ', 10 ") is guided laterally 2. Sheet metal cutting device according to claim 1, characterized in that that as Oberme-jser acting transverse knife (9) on a lateral extension (8) of the axis of rotation (5,6) of the swivel beam (4) is pivoted. 3. Sheet metal _{cutting device} according to claims J0 I and 2, characterized in that the two upper knives (7, 9) are independently and individually pivotable and can each be actuated by a separate actuator. 25th