A machine tool includes a motor configured to rotate a spindle, a tool magazine holding a plurality of tools, and a controller. The controller has a storage unit storing motor information indicating that the motor is a synchronous motor. When the machine tool stops, while a tool exchange process is carried out, due to electric power outage, operation of a stop button, a value of a drive current of the motor, or a value output from the sensor, the controller uses a command for the synchronous motor, based on the motor information, as a part of a series of commands for recovery of the machine tool, where the tool exchange process is a process in which a tool attached to the spindle is changed with one of the plurality of tools of the tool magazine.

A gripping device, rock drilling unit and method of gripping drilling tools is disclosed. The gripping device includes a frame and at least one elastic gripping element connected in a fluid-tight manner to the frame. The gripping element may be expanded by conveying pressurized fluid between surfaces of the frame and the gripping element, whereby the gripping element moves against surfaces of the drilling tool and generates friction forces and support.

A machine tool includes: a turret configured to hold a tool through a clamp mechanism; a workpiece main spindle device configured to rotatably hold a workpiece; a switching unit configured to change a clamp state of the clamp mechanism by using rotation torque of the workpiece main spindle device; and an in-machine robot configured to move the switching unit. The clamp mechanism includes a torque input hole to which rotation torque is applied to change the clamp state. The switching unit includes an input shaft coupled with the workpiece main spindle device, an output shaft coupled with the torque input hole of the clamp mechanism and configured to output torque to the torque input hole, and a transmission mechanism configured to transfer, to the output shaft, the rotation torque of the workpiece main spindle device input through the input shaft.

A machine tool includes a lower tool post for holding a cutting tool, a tool main spindle for holding a cutting tool, a storage unit capable of storing the cutting tool, an exchange mechanism for exchanging the cutting tools between the tool main spindle and the storage unit, an inside robot for exchanging the cutting tools between the lower tool post and the tool main spindle, and a controller. The controller performs control such that the cutting tools are exchanged between the lower tool post and the storage unit via the inside robot, the tool main spindle, and the exchange mechanism.

In a machine tool having a tool carrier (1) that comprises at least one receptacle (4) for a tool holder (3) for driven or stationary tools a tool change device is provided that comprises gripping means (370) for gripping the tool holder (3) at the housing (7) or at part (71) connected with the housing (7). In addition to the gripping means the tool change device comprises a device for actuating the fastening means that are configured for attachment of the tool holder at the tool carrier.

The invention relates to a processing plant (1) comprising: at least one first working spindle (2); a tool magazine (6) for storing different processing tools (4), wherein at least one storage plane (10) having several tool receiving spaces (11) arranged next to one another is provided in the tool magazine (6); a tool change device (5) comprising at least one first gripper device (13) for exchanging the processing tool (4) held in the working spindle (2), wherein the gripper device (13) comprises at least one first gripper unit (15) and one second gripper unit (16) which are positioned at a gripper-unit distance (17) from one another.

The gripper units (15, 16) can be displaced between the working spindle (2) and the tool magazine (6).

A gripper device includes at least one gripper unit which is at least designed to, in at least one work step, grip and/or move a tool and/or a tool holder with at least one tool, and at least one protective unit, which is designed to at least substantially encompass at least a work region of the tool at least in part during the work step. The protective unit is fastened, at least in part during the work step, at least to the gripper unit.

A fast tool changing method with pre-unclamping step for controlling operations of the spindle, tool unclamping cylinder, and tool changing arm. The spindle has one end clamping the tool at the clamping position. The method includes following steps. In a tool pre-unclamping step, the clamp end of the spindle moves the used tool to a pre-unclamping position; the tool unclamping cylinder pushes the used tool to leave a taper of the spindle. In a tool changing step, the tool changing arm rotates to clamp the used tool and pulls the used tool away from the clamp end, and further aligns a target tool with the clamp end. In a tool inserting step, the tool changing arm inserts the target tool into the clamp end, to be clamped therein. Therefore, the tool unclamping and tool clamping operations are accelerated.

The invention relates to a machine tool (10) comprising a machine controller (19), a machine frame (11), a work table (13), a tool holder (14), preferably of a standardized design, multiple translational and/or rotational axes (12a, 12b) for adjusting the relative position of the work table (13) and the work holder (14), a tool magazine (16) for one or more material-removing, in particular machining tools (15), a tool-change mechanism for automatically transporting tools between the tool holder (14) and the tool magazine (16), a deposit-welding head (20) that can be inserted into the tool holder (14) and a storage device (25) for storing the deposit-welding head outside the tool holder (14).

Provided is a machine tool (1) capable of effectively removing machining chips adhering to a portion excluding a held portion and including a machining working portion of a tool (T). The machine tool (1) includes a tool holding unit (6) holding the tool (T), a feed mechanism (10, 11, 12) moving the tool holding unit (6) in at least one axis direction, an enclosure (22) provided within an operating area of the tool (T), having an opening, and having an interior area into which a portion of the tool (T) exposed outside from the tool holding unit (6) can be partially or entirely enclosed through the opening, a fluid injecting nozzle (23, 24) provided on at least one of the tool holding unit (6) and the enclosure (22) and injecting a fluid toward the tool (T) enclosed in the enclosure (22), and a controller (15) controlling the feed mechanism (10, 11, 12) such that the tool (T) is enclosed into the enclosure (22) by moving the tool holding unit (6), and controlling an injecting operation of the fluid injecting nozzle (23, 24) such that the fluid is injected in a state where the tool (T) is enclosed in the enclosure (22).