A divergent segment includes a stationary divergent portion and a movable divergent portion suitable for occupying a retracted position and a deployed position. The threaded rod has a head supported by a support secured to the stationary divergent portion in cooperation with a rotary drive for driving the threaded rod in rotation, and a tip suitable for being inserted in a holder sleeve secured to the stationary divergent portion. The threaded rod cooperates with a nut secured to the movable divergent portion so that rotation of the rod causes the movable divergent portion to move. The tip presents an enlargement having at least one groove passing axially therethrough.

A CNC dual-spindle transmission device is installable on a CNC dual-spindle machining center to receive first and second spindles of the CNC dual-spindle machining center to mount thereto. The CNC dual-spindle machining center includes a base, a machining table movably mounted on the base, and a vertical column erected upright at a rear portion of the base. The CNC dual-spindle transmission device includes a linear rail assembly mounted to the vertical column, a first slide seat slidably mounted to the linear rail assembly and receiving the first spindle to mount thereto, a second slide seat extending across the first slide seat and slidably mounted to the linear rail assembly in a manner of being spaced from the first slide seat to receive the second spindle to mount thereto, and first and second power units mounted to the vertical column to respectively driven the first and second slide seats to move.

A table device includes a ball screw including a male screw member extending in an axial direction and a female screw member meshing with the male screw member and movable in the axial direction according to rotation of the male screw member, a slide device that movably supports the female screw member, and a fixing member to which the slide device is fixed. The fixing member includes a first wall section extending in a first direction and a second wall section extending in a second direction crossing the first direction in a cross section including an axis of the male screw member.

A high-speed nut rotation feed ball screw device includes a ball screw, a ball screw nut, a bearing unit, and a driving unit. The ball screw is fixed on a machine tool via a ball screw seat. The bearing unit includes an inner bearing fixing sleeve, an outer bearing fixing sleeve, and a bearing assembly. One end of the inner bearing fixing sleeve is fixedly connected to one end of the ball screw nut, and another end is fixedly connected to the driving unit. The ball screw nut is arranged on the ball screw. The driving unit includes a first pulley, a second pulley, a synchronous belt, and a driving motor. The first pulley is connected to the driving motor. The second pulley is sleeved on the ball screw and is connected to the inner bearing fixing sleeve. The first and second pulleys are connected via the synchronous belt.

The invention relates to a multiaxial machining center (30) for machining a part (35), comprising: a support plate for supporting a part (35) to be machined, a positioning carriage (36) that can be moved with respect to the support plate along at least one first axis of movement, a machining carriage (32) that can be moved with respect to the positioning carriage (36) along a second axis of movement perpendicular to said at least one first axis of movement, a connection mechanism between the machining carriage and the positioning carriage, which connection mechanism is configured to guide and move in translation the machining carriage,
the connection mechanism furthermore comprising: a system for applying a predetermined force to the machining carriage (32) along the second axis of movement, a unit for controlling the force applied to the machining carriage (32) by the application system.

The invention relates to a multiaxial machining center (30) for machining a part (35), comprising: a support plate for supporting a part (35) to be machined, a positioning carriage (36) that can be moved with respect to the support plate along at least one first axis of movement, a machining carriage (32) that can be moved with respect to the positioning carriage (36) along a second axis of movement perpendicular to said at least one first axis of movement, a connection mechanism between the machining carriage and the positioning carriage, which connection mechanism is configured to guide and move in translation the machining carriage,
the connection mechanism furthermore comprising: a system for applying a predetermined force to the machining carriage (32) along the second axis of movement, a unit for controlling the force applied to the machining carriage (32) by the application system.

An apparatus for active contact force control can have an upper flange on which to mount a production tool. The apparatus can be mounted, via a lower flange, on a multi-axis machine to obtain spatial motion together with the corresponding production tool. The apparatus can comprise a housing inside which can be a linear actuator connected to guides. Mechanical connection between a ball screw and the upper flange can contain a force sensor and at least one spherical joint. The connection between the spherical joint and the upper flange can be formed using a mechanical dissipative element made of elastic dissipative elements and a disc plate positioned between the elastic dissipative elements.

An apparatus for active contact force control can have an upper flange on which to mount a production tool. The apparatus can be mounted, via a lower flange, on a multi-axis machine to obtain spatial motion together with the corresponding production tool. The apparatus can comprise a housing inside which can be a linear actuator connected to guides. Mechanical connection between a ball screw and the upper flange can contain a force sensor and at least one spherical joint. The connection between the spherical joint and the upper flange can be formed using a mechanical dissipative element made of elastic dissipative elements and a disc plate positioned between the elastic dissipative elements.

A ball screw assembly and methods for controlling the same in which the degradation of preload and/or development of backlash is monitored by calculating the axial natural frequency of the ball screw assembly are disclosed. The ball screw assembly includes a ball screw operatively coupled with a motor, and a ball screw nut mounted to the ball screw, such that rotation of the ball screw about an axis of rotation causes the ball screw nut to translate along the axis of rotation. Vibration of the ball screw nut during operation and coincident motor operational parameters are measured using corresponding vibration and motor sensors, and the resulting data is processed to determine an instantaneous natural frequency of the ball screw assembly. This instantaneous natural frequency value may then be compared against thresholds to trigger actions and/or correlated with a backlash value to influence operation of the ball screw assembly.