Machine tool, in particular for drilling
AssigneesAmvalor, Advanced Engineering & Innovation
InventorsGeorges Moraru, Didier Frangeard
Life of this patent
Estimating the term…
Abstract
Machining tool comprising a frame in which a drive shaft for a tool is mounted so as to pivot about a rotation axis and to move axially along the rotation axis. The shaft is connected to two rotary motors, namely a first motor connected to a member for meshing with a fluted portion of the shaft in order to drive the shaft in rotation and a second motor connected to a nut engaged with a threaded portion of the shaft in order to move the shaft axially. The motors are connected to at least one control unit designed to control the motors independently of one another, and the first motor and the second motor are coaxial with one another.
Claims13
A machining tool comprising a drive shaft of a tool extending along an axis, a first motor connected to a coupling member which is in sliding connection with a first section of the shaft in order to drive the shaft in rotation about the axis and a second motor connected to a nut which is in helicoidal connection with a second section of the shaft in order to move axially the shaft along the axis, the first motor and the second motor being coaxial with one another and connected to a control unit connected to position sensors of rotors of the first motor and second motor, the control unit controlling the first motor and second motor so as to produce an axial displacement at constant speed of the drive shaft and to superpose onto this axial displacement axial oscillations having an amplitude and a frequency adapted for chip fragmentation, the control unit permitting a modification in real time of the amplitude and the frequency of the axial oscillations independently of the drive shaft rotation about the axis.
A machining tool comprising a drive shaft of a tool extending along an axis, a first motor connected to a coupling member which is in sliding connection with a first section of the shaft in order to drive the shaft in rotation about the axis and a second motor connected to a nut which is in helicoidal connection with a second section of the shaft in order to move axially the shaft along the axis, the first motor and the second motor being
- coaxial with one another and connected to a control unit connected to position sensors of rotors of the first motor and second motor, the control unit being programmed to control the first motor and second motor so as to produce an axial displacement at constant speed of the drive shaft and to superpose onto this axial displacement axial oscillations having an amplitude and a frequency adapted for chip fragmentation, the control unit permitting a modification in real time of the amplitude and the frequency of the axial oscillations independently of the drive shaft rotation about the axis.
A machining tool comprising a drive shaft of a tool extending along an axis, a first motor connected to a coupling member which is in sliding connection with a first section of the shaft in order to drive the shaft in rotation about the axis and a second motor connected to a nut which is in helicoidal connection with a second section of the shaft in order to move axially the shaft along the axis, the first motor and the second motor being coaxial with one another and connected to a control unit connected to position sensors of rotors of the first motor and second motor, the control unit determining in real time and a synchronized manner an angular position and electrical parameters enabling the control unit to control the first motor and second motor so as to produce an axial displacement at constant speed of the drive shaft and to superpose onto this axial displacement axial oscillations having an amplitude and a frequency adapted for chip fragmentation, the control unit permitting a modification in real time of the amplitude and the frequency of the axial oscillations independently of the drive shaft rotation about the axis.
Dependencies are inferred from the claim text.