Abstract: A vertical broaching machine comprises a machine stand having an upper rail and a lifting carriage displaceably guided on the stand and drivable by means of lifting spindles which are supported in spindle nuts lodged in the rail for rotational driving. An upper workpiece holder is mounted on the rail, holding a broach when a compressive broaching job is carried out.
Type:
Grant
Filed:
June 3, 1997
Date of Patent:
November 10, 1998
Assignee:
Oswald Forst Maschinenfabrik u. Apparatebauanstalt GmbH & Co. Kommanditgesellschaft
Inventors:
Herbert Holstein, Rudolf Dotsch, Andreas Berktold