Back to results
US 5,833,411 AGranted
Vertical broaching machine
AssigneeOswald Forst Maschinenfabrik u. Apparatebauanstalt GmbH & Co. Kommanditgesellschaft
InventorsHerbert Holstein, Rudolf Dotsch, Andreas Berktold
Life of this patent
Estimating the term…
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.
Claims7
A vertical broaching machine, comprising
- a machine stand (3),
- an upper rail (4) mounted on the machine stand (3),
- a lifting carriage (7) vertically displaceably guided on the machine stand (3),
- a feeder carriage (8) disposed underneath the lifting carriage (7),
- two lifting spindles (19) having central longitudinal axes (20) in a common plane and connecting the rail (4) and the lifting carriage (7),
- spindle drives (22) being in rotationally driving connection with the lifting spindles (19),
- at least one upper broach holder (23) mounted on the rail (4),
- at least one workpiece feed (15) disposed on the lifting carriage (7) and adapted to receive a workpiece (16) to be broached,
- at least one lower broach holder (14) mounted on the feeder carriage (8),
- wherein one upper broach holder (23) and one lower broach holder (14) define a central longitudinal axis (18) of a broach (17),
- wherein one workpiece feed (15) is disposed coaxially to said central longitudinal axis (18) of a broach (17), and
- wherein said central longitudinal axis (18) of a broach (17) is disposed in said common plane and symmetric to said central longitudinal axes (20) of said lifting spindles (19).
9 more elements
Dependencies are inferred from the claim text.