Arrangement for indirect extrusion and method for making a hole in a rod and for extrusion of the rod

摘要

An indirect extrusion press and method of operating the press. The press includes a container with opposite axial ends and an axial cavity for receiving a billet. The container is mounted for aligning the axial cavity with the extrusion axis. A bolster is disposed adjacent one axial end of the container for blocking movement of a billet out of the cavity when a force is applied against the billet from the other axial end of the container. A ram is mounted on the side of the container adjacent the other axial end of the container for movement in the axial direction of the container. The ram has an axial passage therethrough aligned with the extrusion axis. A rotatable turret is mounted on the ram, and a hollow pressing stem is mounted on the turret. The turret is rotatable for placing the hollow pressing stem in a first position aligned with the extrusion axis, and in a second position off of the extrusion axis. When the hollow pressing stem is in the first position it communicates with the axial passage through the ram and can be moved axially, via the ram, to press a die through the cavity to extrude a billet to form an extrusion product which exits the container via the hollow pressing stem and the axial passage in the ram. When the hollow pressing stem is in the second position it permits other tooling to perform operations on the extrusion axis of the press.