The present disclosure provides a spindle structure including a base, a spindle, a sliding member, a restoring mechanism, and a restriction member. The spindle is rotatably received in the base and forms a receiving room. An end of the receiving room is a blind end communicating exterior via a gas channel. The sliding member is slidably received in the receiving room, and two ends thereof are a piston and a driving portion respectively. A gas cavity is defined between the piston and the blind end. The sliding member tends to move toward the blind end due to the restoring mechanism. The restriction member is connected to the driving portion and radially deforms when the sliding member slides so as to fix or to release the tool-holder. The sliding member slides outward when the gas cavity is injected with gas via the gas channel.

The invention relates to a spindle (1) of a machine tool, in particular a machine tool for machining workpieces, as well as to other components of a machine tool for in particular automatedly maintaining and cleaning collet chucks. To this end, the spindle (1) has a connecting plate (100) for connecting the spindle (1) to a compressed air unit and a lubricant supply of a machine tool, a shank element (110) that can be displaced in the longitudinal direction (L) of the spindle (1) and is mounted in the connecting plate (100) of the spindle (1), as well as a spindle shank (121) that can be rotated in the circumferential direction (U) of the spindle (1), with a connecting piece (124) for connecting a connecting element (202) of a collet chuck (200) set up to receive a processing tool or a maintenance tool (300) to the spindle. The shank element (110) has a through hole (113) in the longitudinal direction (L) of the spindle (1), wherein the connecting plate (100) has a lubricant inlet (105) for connection to the lubricant supply, and at least one separate compressed air inlet (104) for connection to the compressed air unit. The connecting plate is set up to fluidically connect the through hole (113) of the shank element (110) to the at least one compressed air inlet (104) as well as the lubricant inlet (105).

A machining unit for a machine tool includes a carrier head base, which on its rear side includes a carriage. The carriage can be coupled to axis guides and is longitudinally displaceable. The machining unit further includes a spindle carrier head held pivotably on the carrier head base. The spindle carrier head has a spindle with a tool holder. The carrier head base is provided with a damping unit. The disclosed machining unit provides increased precision of a machine tool. The machining unit may be incorporated in a machine tool.

A spindle phase indexing device for a machine tool is equipped with a guide rail detachably or fixedly attached to a table, a phase indexing jig configured to travel on the guide rail and which includes a first fitting part, a cutting tool including a second fitting part configured to be fitted with the first fitting part, and a controller configured to store therein a phase of a spindle at a point in time when the first fitting part and the second fitting part are fitted together. The first fitting part and the second fitting part are formed such that rotation of the cutting tool is constrained when the first fitting part and the second fitting part are fitted together.

The invention relates to a dynamically dampened centerless grinding machine tool comprising wheels between which there is arranged a part to be ground, heads for carrying the wheels, at least one translation means for translating one of the heads to cause a movement according to a separation and approach direction of the wheels, detection means for detecting a vibration of at least one of the heads, and at least one damper configured for causing a vibration damping movement.

The present disclosure relates to a fixing device arranged to be fastened to a machining head such as a drill head. A machine tool for machining workpieces such as metal sheets at a machining point is also disclosed. The workpieces may be machined from a machining side. A fastening device is included and adapted for fastening the fixing device to the machining head. A fixing head is included and adapted for releasably, locally fixing the workpiece on its machining side and adjacent to the machining point. A controller is included and configured to control the fixing and releasing of the fixing head on a workpiece.

A tool spindle for machine tool includes a tool spindle having a front end in which a tool is mounted and installed to be rotatable, and a vibration damping device mounted in a rear end of the tool spindle to damp cutting vibration generated at the front end of the tool spindle, and including a rigid member coupled to the rear end of the tool spindle and a tuned mass member elastically supported by the rigid member.

The present disclosure provides a spindle structure including a base, a spindle, a sliding member, a restoring mechanism, and a restriction member. The spindle is rotatably received in the base and forms a receiving room. An end of the receiving room is a blind end communicating exterior via a gas channel. The sliding member is slidably received in the receiving room, and two ends thereof are a piston and a driving portion respectively. A gas cavity is defined between the piston and the blind end. The sliding member tends to move toward the blind end due to the restoring mechanism. The restriction member is connected to the driving portion and radially deforms when the sliding member slides so as to fix or to release the tool-holder. The sliding member slides outward when the gas cavity is injected with gas via the gas channel.

A machine tool includes a first machine element movable in a travel direction and having first and second side faces. The first and second side faces of the first machine element run parallel to the travel direction and are oriented at a right angle to each other. The first machine element is moved in the travel direction in a guideway of a second machine element by a drive unit in a positionally controlled manner. The machine tool further includes first and second vibration dampers which are oriented at a right angle to the travel direction and configured to dampen vibrations of the first machine element in respective vibration directions. At least one of the first and second vibration dampers is oriented to solely dampen a vibration in a vibration direction that is neither parallel to the first side face nor parallel to the second side face.

The present application relates to a machining assembly comprising an effector intended to be mounted on a robot with multiple degrees of freedom, in which invention the mounting of the motor spindle relative to the intermediate supports and frame of the effector allows a numerically controlled movement along three axes X, Y, Z of a trihedron, the effector bearing on the piece to be machined or on the surrounding tools by means of a ball joint at the foot end of the effector. Since the effector bears on the piece to be machined or on the surrounding tools it is possible to create local stiffness and to obtain the precision required to guarantee the quality of the machining process.