DE29508767U1 - Pipe bending device - Google Patents

Description

PATENT ATTORNEY

DIpL-In ₈ -WK RAUH * ; ;” · · J.. J &khgr; »..

Mittelstr. 55 ·- * ♦«· · · * ··♦>

D-52072 AACHEN ,!.-V *..*...' ..'...'

Tel. 0241 / 17 41 46 Fax 17 51 46

Note: Peter THOMA, file 4-855

Mühlenstr.25
52457 ALDENHOVEN-SIERSDORF

PIPE BENDING DEVICE

The innovation concerns a pipe bending device according to the preamble of claim 1.

Pipes are usually bent using pipe bending devices, which consist of bending rollers arranged one behind the other on a base plate and an axially movable bending punch arranged perpendicular to the bending rollers in the plane of symmetry. The bending punch can be moved manually or by motor.

Such bending equipment cannot be used to produce precise bent parts. In particular, it is not possible to produce round tube frames for railings in one or two parts with precise dimensions. Instead, prefabricated pipe bends must always be welded to straight pipe parts cut to the exact length, which makes such products relatively expensive.

The innovation is based on the task of designing a pipe bending device of the type mentioned above in such a way that it enables pipes to be bent to a precise dimension without the need to weld pipe bends.

The solution to the problem consists in the characterizing features of claim 1.

Since the measured pipe section pivots due to the action of the bending punch, the rotating bearing of the pipe bending device on the one hand and the rotating bearing of the arm for the stop on the other hand create a balance without causing jamming or dimensional deviations.

Advantageous further developments of the innovation are specified in the subclaims.

The innovation is explained in more detail below using an example shown in the drawing. It shows:

Fig.l is a partially sectioned view of a pipe bending device according to the innovation and
Fig.2 is a top view of Fig.l.

The drawing shows a pipe bending device according to the innovation. It consists of a bench-like machine frame 1 with a bending device arranged on it, which is known per se.

The machine frame essentially consists of a U-profile 3 and a slightly lower H-profile 4 welded to it with a bearing 5 for the rotatable mounting of the pipe bending device 2, which is thus at the working height of the U-profile 3. Foldable legs 6 are also attached to the machine frame 1.

At the end of the machine frame facing away from the pipe bending device 2, a rotation axis 7 is provided for an arm 8 which lies in the U-profile 3. It can consist of a square tube and carries a length measuring scale 9 as well as a movable and

• φ · ·

stop 11, which can be set using the locking screw 10 for the pipe 12 to be bent.

The pipe bending device 2 consists of two bending rollers 13 arranged one behind the other in the longitudinal direction of the pipe to be bent and an axially movable bending punch 14 arranged in the plane of symmetry therewith, which can be moved manually or by motor.

During operation, the pipe 12 to be bent is placed in the bending device and pushed forward to the stop 11. The pipe length is determined by reading the measuring scale 9 and adjusting the stop 11 accordingly. When the bending punch 14 moves forward, the entire pipe bending device 2 rotates slightly about its rotating bearing 5. At the same time, the arm 8 for the stop 11 rotates slightly about its axis of rotation 7, so that the pipe 12 does not shift or become jammed and the measured pipe length is bent precisely.

In this way, pipe sections can be bent with millimeter precision. In particular, it is possible to produce pipe frames, i.e. workpieces with several bending points, in one piece without having to weld pipe elbows to straight pieces. This significantly reduces production times and largely avoids welding work.

Claims (3)

1. Pipe bending device, consisting of a machine frame with a pipe bending device, which in turn is made up of two bending rollers arranged at a distance from one another and an axially movable bending punch arranged perpendicular to this in the symmetry plane of the bending rollers, characterized, that the machine frame (1) is designed as an elongated bench, at one end of which there is a rotatable bearing (5) for the pipe bending device (2) and at the other end there is an axis (7) for the rotatable mounting of an arm (8) for a stop (11) for the pipe to be bent (12). 2. Pipe bending device according to claim 1, characterized in that the stop (11) is adjustably arranged along its arm (8). 3. Pipe bending device according to claim 1 or 2, characterized in that the arm (8) for the stop (11) carries a measuring scale (9). For Peter TH0MA SPONSOR K. RAUH LAWYER