An earth working machine (10) encompasses a machine body (13) having a machine frame (12) and a drive configuration (46), rotationally drivable relative to the machine frame (12) around a drive axis (A) that defines an axial direction, that extends along the drive rotation axis (A) from an introduction longitudinal end (46a) at which the drive configuration (46) is embodied for introduction of a drive torque to a functional longitudinal end (46b) located axially oppositely from the introduction longitudinal end (46a), and to which configuration a working apparatus (32) embodied for earth working is releasably connected in torque-transferring fashion, in an operating position, for rotation together around the drive axis (A), such that when the connection is released, the working apparatus (32) is removable from the operating position in an axial direction relative to the drive configuration (46) for deinstallation from the drive configuration (46) and, for installation on the drive configuration (46), is conveyable into the operating position in an axial direction relative to the drive configuration (46), an actuator (65) being provided which is embodied to move the working apparatus (32) out of the operating position when the connection is released.

According to the present invention, provision is made that an actuator housing (62) of the actuator (65) is provided on the drive configuration (46) for movement together therewith, at a position that is located closer to the functional longitudinal end (46b) than to the introduction longitudinal end (46a), an actuator member (63) of the actuator (65) being movable relative to the actuator housing (63).

A numerically controlled machine tool that can accurately control a position of a machining member for machining a workpiece. The numerically controlled machine tool comprises: a first post member installed on a main body slidingly in a left/right direction; and first, second and third horizontal rails installed on the main body lengthily in the left/right direction and respectively coupled to two points of the rear surface and one point of the front surface of the first post member for guiding sliding of the first post member.

A cutting bit assembly for attachment to a tool holder of a milling-type machine includes a cutting tip, a generally cylindrical shank extending from the cutting tip and comprising a rotation-limiting surface, and a spring clip surrounding a body of the shank. The spring clip includes a protrusion configured to interact with the rotation-limiting surface of the shank to limit rotation of the shank relative to the spring clip. The spring clip includes a contracted configuration and an expanded configuration, and in both the contracted configuration and the expanded configuration the protrusion interacts with the rotation-limiting surface.

A milling machine including a frame (2) having a work surface (2.1) disposed in a vertical plane and a C-shaped moving bridge (3). In addition, the machine includes: at least three heads (7), each head including a machining spindle (15); and five movement axes (X, Y, Z, A, B), such that the moving bridge (3) is moved by the frame (2) along a horizontal axis (X). Each head (7) is moved independently on the moving bridge (3) along a vertical axis (Y) in order to be moved towards or away from the work surface (2.1) along a depth axis (Z) perpendicular to both the horizontal axis (X) and the vertical axis (Y), as well as rotating independently about a first axis of rotation (A). Each spindle (15) rotates independently about a second axis of rotation (B).

A numerical control machine-tool includes: a ground-resting base plate; a movable supporting column rising cantilevered from the base plate in a substantially vertical direction and movable horizontally on said base plate; a first electronic-controlled drive assembly for moving the supporting column along the base plate; a head-carrier slide fixed in vertically sliding manner in a straight longitudinal slit extending along the front face of the supporting column parallel to the longitudinal/vertical axis of the supporting column; a second electronic-controlled drive assembly for moving the head-carrier slide along the supporting column; a straight supporting beam inserted in an axially sliding manner into the head-carrier slide and cantilevered juts out from the front face of the supporting column while remaining substantially parallel to the ground; and a third electronic-controlled drive assembly for moving the supporting beam forwards and backwards with respect to the head-carrier slide parallel to the beam longitudinal axis.

A machining device for machining an annular workpiece, in particular a turbomachine, wherein the machining device includes an attachment system for removably attaching the machining device to the workpiece; a machining tool for machining at least one region to be machined of the workpiece; a carriage for conveying the machining tool; and a rail shaped so as to guide the conveying carriage in translation along the region to be machined of the workpiece.