Abstract

A spindle for a machine tool, including a housing, a shaft for driving a cutting tool, rotatably mounted inside the housing with a possibility of axial movement relative to the housing, a single ball, axially interposed between a bearing ring fixed relative to the housing and a bearing ring movable with the shaft, one of these rolling rings defining an inclined bearing surface that is not perpendicular to the axis of rotation of the shaft, so that the rotation of the ball generates an axial oscillation of the shaft.

IPC Classes  ?

• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool

Abstract

Spindle for carrying out machining assisted by non-ultrasonic axial oscillations, including a tool-bearing shaft, and an exciting portion, for subjecting the shaft to non-ultrasonic axial oscillations, especially during its rotation. The exciting portion including a first exciting stage, having at least one piezoelectric actuator, and a second exciting stage, having at least one piezoelectric actuator, having a non-zero axial overlap with the first exciting stage, the actuators of the two stages being arranged so that their effects add.

IPC Classes  ?

• B23Q 1/34 - Relative movement obtained by use of deformable elements, e.g. piezoelectric, magnetostrictive, elastic or thermally-dilatable elements
• B23Q 11/12 - Arrangements for cooling or lubricating parts of the machine
• B23Q 1/64 - Movable or adjustable work or tool supports characterised by the purpose of the movement

Abstract

Disclosed is a spindle (1) for a machine tool, comprising - a housing (10), - a shaft (20) for driving a cutting tool, rotatably mounted inside the housing with a possibility of axial movement relative to the housing, - a single ball (200), axially interposed between a bearing ring (202) fixed relative to the housing and a bearing ring (201) movable with the shaft, one of these rolling rings defining an inclined bearing surface (231) that is not perpendicular to the axis of rotation of the shaft, so that the rotation of the ball generates an axial oscillation of the shaft.

IPC Classes  ?

• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool

Abstract

Disclosed is a spindle (1) for a machine tool, comprising - a housing (10), - a shaft (20) for driving a cutting tool, rotatably mounted inside the housing with a possibility of axial movement relative to the housing, - a single ball (200), axially interposed between a bearing ring (202) fixed relative to the housing and a bearing ring (201) movable with the shaft, one of these rolling rings defining an inclined bearing surface (231) that is not perpendicular to the axis of rotation of the shaft, so that the rotation of the ball generates an axial oscillation of the shaft.

IPC Classes  ?

• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool

Abstract

Spindle (10) for carrying out machining assisted by non-ultrasonic axial oscillations, comprising: - a tool-bearing shaft (12), and - an exciting portion, for subjecting the shaft to non-ultrasonic axial oscillations, especially during its rotation, this exciting portion comprising: o a first exciting stage, comprising at least one piezoelectric actuator (24), and o a second exciting stage, comprising at least one piezoelectric actuator (22), having a non-zero axial overlap with the first exciting stage, the actuators of the two stages being arranged so that their effects add.

IPC Classes  ?

• B23Q 1/70 - Stationary or movable members for carrying working-spindles for attachment of tools or work
• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool
• B23Q 1/34 - Relative movement obtained by use of deformable elements, e.g. piezoelectric, magnetostrictive, elastic or thermally-dilatable elements
• B23Q 5/28 - Electric drives
• B23Q 5/32 - Feeding working-spindles

Abstract

Spindle (10) for carrying out machining assisted by non-ultrasonic axial oscillations, comprising: - a tool-bearing shaft (12), and - an exciting portion, for subjecting the shaft to non-ultrasonic axial oscillations, especially during its rotation, this exciting portion comprising: o a first exciting stage, comprising at least one piezoelectric actuator (24), and o a second exciting stage, comprising at least one piezoelectric actuator (22), having a non-zero axial overlap with the first exciting stage, the actuators of the two stages being arranged so that their effects add.

IPC Classes  ?

• B23Q 1/70 - Stationary or movable members for carrying working-spindles for attachment of tools or work
• B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
• B23B 37/00 - Boring by making use of vibrations of ultrasonic frequency
• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool
• B23Q 1/34 - Relative movement obtained by use of deformable elements, e.g. piezoelectric, magnetostrictive, elastic or thermally-dilatable elements
• B23Q 5/28 - Electric drives
• B23Q 5/32 - Feeding working-spindles

Abstract

max for Do in the interval [1; 3] in mm and 0.5≦Do/Djmax for Do in the interval [3; 20] in mm, where Do is the diameter of the tool facing this other seal and Djmax is the internal diameter of this seal.

IPC Classes  ?

• B23Q 11/10 - Arrangements for cooling or lubricating tools or work
• B23B 31/02 - Chucks
• B23B 31/20 - Longitudinally-split sleeves, e.g. collet chucks

Abstract

A machining method for at least one shaping machining operation can include carrying out a machining operation over a first distance using a cutting tool which is subjected to axial oscillations as it moves forward, then reducing the amplitude of the axial oscillations while continuing to drive the cutting tool in terms of rotation.

IPC Classes  ?

• B23B 41/16 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring holes with high-quality surface
• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool
• B23B 41/06 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring conical holes
• B23B 47/00 - Constructional features of components specially designed for boring or drilling machinesAccessories therefor
• B23Q 5/32 - Feeding working-spindles
• B23Q 5/40 - Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw

Abstract

The present invention concerns a sealing system for a tool holder (10) of a fluid-assisted axial machining or milling machine, comprising: -at least first (50) and second (60) seals contributing to define a space (41) for the flow of fluid to at least one inner channel (21) of the tool, one (60) of the seals being applied to the tool (20) or an optional adapter carrying the tool and the other seal (50) a) being applied to the tool or to the adapter carrying the tool or b) being applied to a surface spaced apart from the tool and rotating with same, with 0.3 = Do/Djmax for Do in the interval [1; 3] in mm and 0.5 = Do/Djmax for Do in the interval [3; 20] in mm, where Do is the diameter of the tool facing this other seal (50) and Djmax is the internal diameter of this seal (50).

IPC Classes  ?

• B23Q 11/10 - Arrangements for cooling or lubricating tools or work
• B23B 31/02 - Chucks

Abstract

The present invention concerns a sealing system for a tool holder (10) of a fluid-assisted axial machining or milling machine, comprising: -at least first (50) and second (60) seals contributing to define a space (41) for the flow of fluid to at least one inner channel (21) of the tool, one (60) of the seals being applied to the tool (20) or an optional adapter carrying the tool and the other seal (50) a) being applied to the tool or to the adapter carrying the tool or b) being applied to a surface spaced apart from the tool and rotating with same, with 0.3 ≤ Do/Djmax for Do in the interval [1; 3] in mm and 0.5 ≤ Do/Djmax for Do in the interval [3; 20] in mm, where Do is the diameter of the tool facing this other seal (50) and Djmax is the internal diameter of this seal (50).

IPC Classes  ?

• B23Q 11/10 - Arrangements for cooling or lubricating tools or work
• B23B 31/02 - Chucks

Abstract

The present invention relates to a machining process involving at least a shape machining, comprising: c) carrying out machining over a first distance using a cutting tool subjected, as it advances, to axial oscillations, then d) the reduction, in particular cancellation, of the amplitude of the axial oscillations, while continuing to drive the cutting tool in rotation.

IPC Classes  ?

• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool
• B23B 41/06 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring conical holes
• B23B 41/16 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring holes with high-quality surface
• B23B 47/00 - Constructional features of components specially designed for boring or drilling machinesAccessories therefor
• B23B 51/00 - Tools for drilling machines

Abstract

The present invention relates to a machining process involving at least a shape machining, comprising: c) carrying out machining over a first distance using a cutting tool subjected, as it advances, to axial oscillations, then d) the reduction, in particular cancellation, of the amplitude of the axial oscillations, while continuing to drive the cutting tool in rotation.

IPC Classes  ?

• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool
• B23B 41/06 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring conical holes
• B23B 41/16 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring holes with high-quality surface
• B23B 51/00 - Tools for drilling machines
• B23B 47/00 - Constructional features of components specially designed for boring or drilling machinesAccessories therefor

Abstract

The present invention provides an axial machining device comprising a tool-carrier spindle rotatable in a housing, the housing housing a transmission system causing the spindle to advance automatically relative to the housing under the effect of the tool-carrier spindle being driven in rotation, the transmission system including an advance gearwheel screwed onto the spindle, the device including a resilient return member urging the advance gearwheel in a first axial direction opposite to the advance direction of the spindle, and also including a first rolling bearing having rolling members rolling on an undulating raceway having an axial component, thereby periodically urging the advance gearwheel to move in a second direction opposite to the first, such that rotation of the spindle is accompanied by axial vibratory motion.

IPC Classes  ?

• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool
• B23Q 5/32 - Feeding working-spindles

Abstract

The present invention relates to an axial machining device (1), which comprises a tool-holder spindle (3) rotating inside a frame (2), the latter housing a transmission system (5) causing the automatic advance of the spindle relative to the frame (2) during the rotation of the tool-holder spindle, said transmission system (5) comprising an advance pinion (15) screwed onto the spindle (3), said device being characterised in that it includes an elastic return member (40) biasing the advance pinion (15) in a first axial direction, preferably opposite the advance direction (A) of the spindle (3), and in that said device comprises a first bearing (50) comprising bearing members (51) rolling on a corrugated bearing surface having an axial component, such as to periodically bias the advance pinion (15) to move in a second direction opposite the first direction, such that the rotation of the spindle (3) is accompanied by an axial vibration movement.

IPC Classes  ?

• B23Q 5/32 - Feeding working-spindles
• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool

Abstract

The present invention relates to an axial machining device (1), which comprises a tool-holder spindle (3) rotating inside a frame (2), the latter housing a transmission system (5) causing the automatic advance of the spindle relative to the frame (2) during the rotation of the tool-holder spindle, said transmission system (5) comprising an advance pinion (15) screwed onto the spindle (3), said device being characterised in that it includes an elastic return member (40) biasing the advance pinion (15) in a first axial direction, preferably opposite the advance direction (A) of the spindle (3), and in that said device comprises a first bearing (50) comprising bearing members (51) rolling on a corrugated bearing surface having an axial component, such as to periodically bias the advance pinion (15) to move in a second direction opposite the first direction, such that the rotation of the spindle (3) is accompanied by an axial vibration movement.

IPC Classes  ?

• B23Q 5/32 - Feeding working-spindles
• B23B 47/34 - Arrangements for removing chips out of the holes madeChip-breaking arrangements attached to the tool