US 5,421,181 AGranted

Horizontal metal extrusion press

AssigneeSMS Hasenclever GmbH

InventorsJosef Ahrweiler, Horst Groos

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Abstract

In a horizontal metal extrusion press to enable direct measurement of the alignment of the tools, the moving crosshead (9) and the receiver holder (12) in relation to the press axis, the tie rods (4) of the press frame (3) of high dimensional stability are provided with at least three clearance-measuring probes (25), which are directed at central angles of 120.degree. or less radially towards the press axis (X--X) and are centrally adjustable to a reference clearance from the press axis. The probes are disposed in radial planes (R2, R3, e.g.) in which they detect measuring surfaces (27, 28) provided on and centered at least on the receiver or receiver holder (12) and on the tools, in the working position and/or selected positions of the receiver holder and the tools. To enable the measurements to be effected without stoppages, it is advantageous to provide non-contact clearance-measuring probes, for example measuring on the basis of eddy current, laser or ultrasound.

Claims18

Dependent claims

A horizontal metal extrusion press comprising in combination:

a press frame which defines a horizontal press axis and comprises, disposed along said axis, an extrusion ram crosshead, a counter-crosshead, and tie rods interconnecting said crossheads, so that said press frame is of high dimensional stability;
a moving crosshead and a billet receiver movable along and guided by said tie rods for movement in the longitudinal direction of said press axis;
an extrusion ram for effecting said movement for extruding a billet contained in said receiver;
extrusion tools mountable along said press axis;
and means for monitoring alignment with said press axis of at least one of said receiver and tools, comprising, at a common axial position, at least three distance-measuring devices mounted on said tie rods and distributed about and directed towards said press axis, and a co-operating measurement surface provided on said at least one of said receiver and tools, said measuring devices being arranged and adapted to measure distances between said devices and said co-operating measurement surface so that said distances measured by said measuring devices provide an indication of the centering with respect to said press axis of said at least one of said receiver and tools.

2 more elements

Dependencies are inferred from the claim text.