DE1076064B - Metal extrusion press with device for separating the extrusion from the extrusion residue - Google Patents

Description

GERMAN

When operating pipe and extrusion presses, it is necessary to remove the press residue at the end of each pressing process to remove, so that the next pressing process is initiated by feeding and loading the new block can be.

When pressing light and heavy metals, as well as pressing steel, it is common practice to with a shear knife whose carrier, which is guided transversely to the press axis, is hydraulically or mechanically driven is to shear off the protruding press residue along the press die. To this end, will by withdrawing the transducer while the ram is at a standstill, the press residue is removed from the interior of the transducer ejected and thus remains in its position directly on the press die. Well can the residue can be separated by lifting the shearing device along the die.

However, it is not always possible in the course of such pressing processes in the manner described Shear off the pressed residue; because it sometimes happens that the block "freezes"; H. that its temperature drops so far below the normal pressing temperature, that further pressing is no longer possible. A block that is "frozen" in this way can become closed as a result of it low temperature no longer squeezed out and consequently not sheared off, and there is only the Possibility of sawing off the free strand as close as possible to the remainder of the block. For this purpose the transducer, in which the remainder of the block sticks to the press disk, is retracted and thus reached at the same time, that the pressed strand is withdrawn from the press die by a piece corresponding to the pick-up stroke will.

For sawing through the pressed strand in such cases, it is known to provide a sawing device, their carrier, which is guided transversely to the press axis, by means of a special hydraulic or mechanical Drive can be advanced in the direction of the press axis. The extruded strand is here Sawed off close to the press residue in order to keep waste as low as possible.

An older, not previously known suggestion is to jointly tackle a metal extrusion press with one to equip a supporting piece arranged feeding and separating device. In addition, after this Suggestion that the support piece also be equipped with a saw, which is then on the sensor facing side is arranged, while the shear knife on the facing the counter bar Side lies.

In this way, a carrier and its drive, including the control elements, are saved. The advantage lies in correspondingly lower construction costs and space requirements, and easier maintenance

Metal extrusion press with device

for separating the pressed strand

from the press residue

Applicant:

Hydraulics GmbH,
Duisburg, Mülheimer Str. 72

Fritz Priebe, Duisburg,
has been named as the inventor

and maintenance as well as simplified control and a better overview.

In contrast to this older proposal, the invention consists in the exclusive association of the Saw and the shear blade on the support piece, which therefore does not contain the block insertion device.

This design of the separating device is useful when the block from the front into the transducer is introduced. As a result of the narrow design of the device according to the invention is retractable in the direction of the press axis there is only a small gap between the pick-up and the die required so that only a short stroke has to be carried out by the transducer.

An embodiment of the invention is shown in the drawing, namely shows

Fig. 1 is a side view of the device transversely to the press axis when shearing off the residue along the die,

Fig. 2 is the same side view of the device when sawing through the free pressed strand,

Fig. 3 is a side view of this device in the direction of the press axis.

The combined device for shearing and sawing off is on the one above a piston back and forth movable cylinder 11 arranged. It consists essentially of the cutter 10, which is in a correspondingly strong embedding in the cylinder bottom surface 9 is held. This cylinder bottom surface 9 serves at the same time to shear off the pressed residue and push it off of the press disk 3. Performing the shearing and pushing off from the same carrier is known per se.

If, during a pressing process, the block is pressed down to a short piece, the so-called press residue 2j is, the pickup 5 is withdrawn while-

909 757/183

rend the ram initially stops in the end position. Then the ram is also withdrawn. The now exposed residue 2 is by the shear blade 10 when advancing the cutting device sheared along the die 6 from the pressed strand 1, the pressing disk through the bottom surface 9 3. and the residue 2 are repelled.

The cylinder housing 11 also serves to support the circular saw and the associated drive 8. ίο

In cases in which the residue cannot be sheared off, the unit's sawing device occurs in action. Here, the transducer 5 together with the press disk 3 and the inside of the transducer adhering press residue withdrawn, so that the pressed strand 1 from the die 6 is pulled out in the length of the transducer stroke (Fig. 2). The combined sawing and shearing device towards the presses

axis driven and through the circular saw 7 the exposed extrusion strand near the extrusion 2 sawn through.

Claims (1)

Claim: Metal extrusion press with a common support piece for a saw and a shear knife for Separating the strand from the press residue, which is powered between the counter spar and the retracted pick-up is retractable transversely to the press axis and the saw on the pick-up adjacent, which carries the cutting knife on the side adjacent to the counter bar, characterized in that, that the support piece is used exclusively for the combination of saw and cutter. Considered publications:
German Patent Nos. 528 671, 882836;
French patent specification No. 1 035 190. 1 sheet of drawings © 909757/183 2.60