Lathe
AssigneeTornos-Bechler SA
InventorJean C. Simonin
Life of this patent
Estimating the term…
Abstract
A slide (4) made up of a table (8) and a base (11) is actuated radially relative to a workpiece (M) to be machined via a stud (17) adjustable in a slot (16). The position of the stud can be regulated by means of a screw and a motor. A roller (24) borne by the stud then moves along another slot (25) in an arm (26) integral with a shaft (7f). The oscillations of the shaft are controlled by a control cam. Displacement of the stud relative to the pivot point of the arm permits the transmission ratio, hence the course of travel of the slide, to be varied. The angle .alpha. between the directions of the slots is other than zero at the end of the travel, so that the final position of a tool (29) can be adjusted by means of the control motor.
Claims9
A lathe of the type having at least one support, at least one spindle, at least one slide movable on said support relative to a longitudinal axis of said spindle, control means for determining the travel of said slide, and at least one transmission mechanism actuated by said control means, comprising:
- a programmable motor having a rotor and a stator,
- a first transmission element forming part of said transmission mechanism and having an adjustable transmission ratio controlled by said motor;
- and
- a shaft oscillated by said control means about a longitudinal axis of said shaft, wherein said first transmission element is a radial arm integral at one end thereof with said shaft, the active length of said arm being variable and controlled by said motor.
Dependencies are inferred from the claim text.