Sms Schloemann-siemag Aktiengesellschaft

Schloemann-siemag Aktiengesellschaft

Horst H Groos

Heinz Schmoll

Gunther Wintzen

Hermann Fusser

Siegfried Hoffmeier

Urban Richardt

After extrusion in an indirect metal extrusion press a removal arm, the end of which carries a holding sleeve for a die, a discard and a closing plate, is swung into the press axis between the billet carrier and the closing ram. The sleeve is divided into two transversely to the press axis. One part is fixed to the arm and clamps the die, while the other part receives the discard and the closing plate and can be displaced axially in the direction of the closing ram from the fixed sleeve part, the discard and the closing plate attached thereto being released. An hydraulically displaceable clamping seat provided on the removal arm and comprising respective pairs of grippers moves from below up to the closing plate and the discard and embraces them. During the operation to shear the discard from the extruded billet present in the clamped die the discard and the closing plate are moved downwards in a controlled manner. After the extruded billet has been extracted, the removal arm which holds the die on the one hand and the discard with the closing plate on the other hand at different heights, swings into its starting position so as to remove the tools and prepare them again in a controlled manner.

Device for removing a die, a discard and a closing plate from an

A floor-mounted forging press has a static piston arranged on the top beam and a cylinder which slides on the piston and forms a toolholder, and a bore extending through the piston for supplying pressure medium to the cylinder. The piston is hollow and is swivelly mounted by means of ball cups at the lower end of the piston and on the top beam and a thrust bearing member between the ball cups, the piston being held in the vertical position on the top beam with the aid of retaining means. One form of retaining means is a partially resilient pressure medium pipe which holds the piston. Alternatively pins, mounted by means of spherical surfaces, suspend the piston by way of a flange on the piston and are resiliently biased to hold the piston against the top beam in a free-play, resilient and freely movable manner, a bore being provided through the ball cups and thrust bearing member.

Floor-mounted forging press having a stationary piston with a bore for

In tube extrusion presses, there are two steps in production. Firstly, a mandrel pierces a hole through the center of a billet, the tip of the mandrel ending up just within the opening of the extrusion die. Secondly, the now hollow cylindrical billet is extruded through the die and over and around the tip of the mandrel to produce a tube. To limit the movement of the mandrel, stroke-limiting rods are provided which pass through bores in a part attached to the mandrel and in a fixed part of the press. The rods can be held fast in one or both of these bores, or released to slide through them, depending on the stage reached in the extrusion process.

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Metzkausen, Germany

Horst H Groos