EP1135222B1 - Pressure pad device for a bending machine - Google Patents

Abstract

The invention relates to a pressure pad for a bending machine (10), notably a pipe bending machine, in the form of a sliding rail (12) which undergoes a linear displacement during the bending process and comprises several mountings (20, 22, 23, 24) for different bending radii which can be mounted on the sliding rail (12) by lockable and unlockable adapters (21).

Description

The invention relates to a counter holding device for a Bending machine, in particular for a tube bending machine, in Form of a linearly during the bending process mitbewegten slide with several slide rail attachments for different bending radii (see, for example, GB-A-2 187 666).

Since in bending machines with a counter holding device of the beginning mentioned type all slide rail essays simultaneously procedure, these bending machines have the disadvantage that when Bending large radii of the slide rail attachment for a smaller one Radius with tool parts, z. B. a jaw for can collide the small radius, provided the radii accordingly differ from each other. So far, this problem is solved that, instead of slide rails counter-holding rollers be used. For demanding bending tasks, such as Bending very thin-walled pipes, very soft pipes or Bending very small radii, however, are counterhold rolls no longer suitable. Here is the use of slide rails absolutely necessary.

The invention has the object to provide a counter holding device for a bending machine of the type mentioned in addition to improve the risk of collision between slide rail attachments and tool parts is avoided.

The invention solves the problem with a counter holding device of the type mentioned above in that the Slide rail attachments via lockable and unlockable adapters the slide rail are mounted. In this way, preferably when bending large radii the slide rail attachments, especially those for the small radii, from the common Drive the sliding rail attachments are decoupled, causing a collision of the slide rail attachments, in particular those for the small radii, with jaws or others Tool parts is avoided.

With regard to a comfortable machine operation, the Adapter via an NC control be programmable or automatically be locked and unlocked.

To include bending machines without adapter according to the invention to be able to retrofit an adapter, the slide rail attachments and adapter form a retrofit unit.

So that the multiple slide rail attachments to the height of the several bending tools can be aligned, the several slide rail attachments and adapters separately in height be adjustable.

The invention also relates to a bending machine, in particular a pipe bending machine with a jig for a to bending workpiece, in particular a pipe, one with several, different radius bending tools provided bending head and a multiple, horizontal and / or vertically movable to the longitudinal axis of the workpiece and with the Bending tools cooperating jaws having Swivel arm, which is a counter holding device according to the invention having.

Hereinafter, an embodiment of an invention trained bending machine with reference to the accompanying drawings explained in more detail.

Fig. 1

eine schematische Ansicht einer Biegemaschine mit einer Gegenhaltevorrichtung nach der Erfindung;

Fig. 2

eine Seitenansicht auf die Gegenhaltevorrichtung der Biegemaschine aus Fig. 1.

In detail show:

Fig. 1

a schematic view of a bending machine with a counter holding device according to the invention;

Fig. 2

a side view of the counter holding device of the bending machine of FIG. 1.

Fig. 1 shows a bending machine 10 with a machine body 16 and a bending head 17. In a tensioning device 11 can be a not shown here to be bent tube be clamped. A slide rail 12 has the task, the To support and guide the pipe during the bending process. At the front end of the slide rail 12 are slide rail attachments 20, 22, 23, 24 (Figure 2). The movement of the Slide rail 12 must during the bending process in sync with the Bending movement of a clamping block 13 with clamping jaws 18, the on a swivel arm 14 is mounted done. During the bending process the tube is bent over a corresponding bending tool 15.

Fig. 2 shows the slide rail 12 of FIG. 1 in an enlarged View, on the adapter 21, the four slide rail attachments 20, 22, 23, 24 are locked and unlocked mounted. The Locking and unlocking may be for convenience via the NC control of the machine or automatically.

By locking and unlocking can be mainly when bending large radii of the slide rail attachment 20 for smaller bending radii be decoupled from the slide rail. To this In this way, a collision between the slide rail attachment 20 and the clamping jaws 18 shown in Fig. 1 are avoided.

It could of course also for each slide rail attachment 20, 22, 23, 24 a separately movable slide rail 12 is provided become. However, this solution would require a considerable amount of extra work mean at control, drive and measuring devices.

Claims (5)

1. A supporting device or steady for a bending machine, in particular for a pipe-bending machine, in the form of a slide rail (12) moved along linearly during the bending process, said slide rail (12) having a plurality of slide-rail attachments (20, 22, 23, 24) for different bending radii, characterized in that the slide-rail attachments (20, 22, 23, 24) are mounted on the slide rail (12) by way of adapters (21) which can be locked and unlocked
2. A device according to Claim 1, characterized in that the locking and unlocking of the adapters (21) is programmable or takes place automatically by way of an NC control.
3. A device according to Claim 1 or 2, characterized in that the slide-rail attachments (20, 22, 23, 24) and adapters (21) form a retrofit unit.
4. A device according to one of Claims 1 to 3, characterized in that the plurality of slide-rail attachments (20, 22, 23, 24) and adapters (21) can separately be adjusted as to height.
5. A bending machine, in particular a pipe-bending machine (10), comprising a clamping device (11) for a workpiece to be bent, said workpiece particularly being in the form of a pipe, a bending head (17) provided with a plurality of bending tools (15) having different radii, and a swivel arm (14) having a plurality of clamping jaws (18) which can move horizontally and/or vertically in relation to the longitudinal axis of the workpiece and which cooperate with the bending tools (15), characterized in that said bending machine includes a supporting device according to one of Claims 1 to 4.

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