DE8138589U1 - PRESS FOR FORGING LARGE AREA THIN WORKPIECES - Google Patents

Description

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Press to. Forging large, thin workpieces

The innovation relates to a press for forging large areas thin workpieces, for example for the finish forging of pre-forged turbine blades from screw presses.

More and more recently there has been a move towards large areas thin workpieces, such as turbine blades ^ manufacture in the drop forging process. For this purpose, screw presses with a high pressing force are used, on which provided; edet « Workpieces can be forged in one or a few strokes. This requires that the workpieces be strong be heated. Since there are now irciaer larger turbine blades is required, difficulties arise in terms of finish forging. The screw presses cannot do this can be enlarged as required.

Since experience has shown that with the previously known methods this type of heat lost after the workpieces were placed in the engraving, the present one has become The task of the innovation is to solve the problem at hand by using as little heat as possible before the actual problem Forging process is lost.

For this purpose it is proposed according to the innovation in a press of the design described at the beginning that the The lower part of the die holder can be lifted off the press table by means of a lifting device. It is also advantageous that the The upper part of the die holder is fastened to the press ram using screws so that in the unloaded state between the two Dividing a gap is left.

This special press design is particularly noticeable where it is forged with a preheated die

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is used, for example in the manufacture of turbine blades. This known preheating of the dies could only take place within certain limits, since too much heat was transferred on the machines led to expansions on machine parts, which had a negative impact. By that now If gaps are provided between the die holders and the machine parts, it is possible to use the dies to preheat higher temperatures without damaging the actual press. In addition, there is also the heat gradient between the actual workpiece and the lower die is reduced.

The innovation is explained in more detail with reference to a drawing which shows any exemplary embodiment, with a section through a press tool room is dargesi slit.

From the drawing it can be seen that the Gesenkhal-cer upper part 4 is fastened to the press ram 5 by means of screws 20 and 21 in such a way that in the unloaded state between the press ram 5 and a spacer 10 remains in the upper part 4 of the die holder.

The die holder lower part 6 can thereby by means of lifting devices 18 and 19 are lifted from the press table 7 so far that they also here between the press table 7 and the lower part of the die holder 6 sets a spacer part 11. With 3 the upper die is designated.

Claims (1)

^; MASCHINENFABRIK WEINGARTEN AG Weingarten, August 13, 1982 Weingarten / Württ. M 195 A2 Elimination from G 81 17 551.5 Protection claims Press for forging large, thin workpieces, for example for the finish forging of pre-forged turbine blades from screw presses, characterized in that that the lower part of the die holder (6) can be lifted off the press table (7) by means of lifting devices (18, 19). Press according to claim 1, characterized in that the die holder upper part (4) so by means of screws (20, 21) is attached to the press ram (5) so that in the unloaded state there is a gap between the two parts (4, 5) (10) remains. • ·