A dental milling machine comprising a workpiece holder (2) and a changer arm (10) is characterized in that the changer arm (10) has a substantially U-shaped gripping attachment (12) and in that a tool (14) of the dental milling machine (1) has a tool fixation element (16). The tool fixation element has grooves (18) or holding projections at two mutually opposed positions which face away from each other, over which grooves or holding projections the U-shaped gripping attachment (12) of the changer arm (10) can engage, wherein parts of the U-shaped gripping attachment (12), more particularly the side flanks (12a, 12b) of the U-shaped gripping attachment (12), make contact with the grooves (18) or holding projections of the tool fixation element (16) under preload.

Provided is a three-dimensional measurement device applicable to a machining machine. A sensor head contains a body and a collet chuck. A light emitting window and a light receiving window are provided on the front end of the body. A non-contact sensor is incorporated in the body. Laser light emitted by the non-contact sensor is radiated onto a workpiece through the light emitting window. Laser light reflected from the surface of the workpiece is received by the light receiving window. A collet chuck is attached to the rear end of the body. The collet chuck has the same shape as a collet chuck provided by each tool housed in a tool magazine of a machining center.

The invention relates to a machining device for the machine-assisted production and machining of dental workpieces (16), particularly of artificial teeth and/or other dental replacement parts, the at least one workpiece (16) being clamped in at least one workpiece retainer (11) which can be raised, lowered and rotatably driven, is positioned on a rotational axis (9), and, for the purpose of machining, feeds said workpiece (16) to at least one tool spindle (4, 5, 6) that is rotationally driven and has a tool (7) secured thereto, an additional tool retainer (2, 2a, 2b) with a plurality of tools (7) arranged thereupon being associated with said workpiece retainer (11, 11a, 11b) and lying opposite on one side thereof, and a workpiece changer (22, 22a, 22b) which receives the workpieces (16, 16a, 16b, 16c) to be machined, such that they can be exchanged, being arranged on the other side of said workpiece retainer (11, 11a, 11b).

A combined machining apparatus includes a tool holder, a first automatic exchanger capable of containing at least one laser machining head and mounting the at least one laser machining head on the tool holder, and a second automatic exchanger capable of containing at least one mechanical machining tool and mounting the at least one mechanical machining tool on the tool holder.

The invention relates to a system for a method for controlling a machine tool with at least one replaceable tool and a workpiece, especially a mill blank, and for a method for machining the workpiece, which machine tool comprises a robot arm movable along at least 2, especially at least 3 space axes in an area of motion, which carries and moves at least one workpiece, eventually via a workpiece holder, with a control unit for controlling the machine tool. The machine tool (52) includes a sensor (46), especially a space-fixed optical sensor located thereon or associated thereto, and the detection range (42) of which overlaps the area of motion at least partially for detection of a code on the machine tool.

An automatic tool changer includes a cover that partitions a machining area and a non-machining area, and an opening/closing member that opens/closes an opening of the cover by turning in synchronization with rotation of a tool changer magazine. The opening/closing member includes a plate section partitions the machining area and the non-machining area at a position of the opening of the cover. In a case where the tool changer magazine performs tool replacement with respect to a tool storage magazine, the plate section closes the opening of the cover by taking a horizontal posture. In a case where the tool changer magazine performs tool replacement with respect to a main spindle, the plate section opens the opening of the cover by changing its posture from the horizontal posture to an inclined posture or a vertical posture.

A machine tool includes a bed, a column, a rotary main spindle, a tool magazine, a tool changer, and a controller. The tool changer includes a body provided on the bed so as to be movable in a direction orthogonal to a movement direction of the column, a changing arm rotatably provided on the body, and a door provided on the body to open or close an opening formed in the body, and configured to partition an area on the column side from an area on the tool magazine side by closing the opening. The controller is configured to move the body in parallel with at least one of an operation of opening the door and an operation of closing the door.

A tool changer includes a holding member having a tool change arm disposed thereon, a rotation mechanism rotating the holding member at a first rotation speed in normal and reverse directions, a forward/backward movement mechanism moving the holding member forward and backward at a first forward/backward movement speed, and a controller comparing a first difference as a difference between a command value for the rotation and an output value of an encoder with a first threshold. When the first difference is equal to or greater than the first threshold, a rotational speed of the holding member is chained to a second rotation speed slower than the first rotation speed. Alternatively, when the first difference is less than the first threshold, the rotational speed of the holding member is maintained at the first rotation speed.

A cutting apparatus includes a blade changing apparatus. The blade changing apparatus includes a blade mounting and removal portion, which in turn includes: a holding portion that removably holds a circular base of a cutting blade; a moving support portion that supports the holding portion and moves the holding portion to a removal and mounting position at which an insertion hole in the blade faces a boss of a blade mount; and a coupling mechanism that couples the holding portion with the moving support portion such that the holding portion is freely tiltable with respect to the moving support portion. The coupling mechanism includes a plurality of elastic member pairs, each pair, while tensioning the holding portion in opposite directions, fixing the holding portion to the moving support portion. Forces acting from the elastic member pairs balance each other to thereby support the holding portion tiltably and aerially.

A universal machining system capable of accommodating multiple small-batch or one-off machining jobs, involving workpieces of different diameter and composition, comprises a rotating chuck having multiple jaws that may be adjusted positionally inward or outward towards the longitudinal centerline of the workpiece or removed entirely, and a tool turret capable of holding a variety of socketed tools. System also comprises a measurement sensor, which may be separate or comprise one of the socketed tools. A control program collects machining instructions for a series of workpieces, and directs the chuck, the tool turret, the measurement sensor, and at least one robot to load/unload workpieces and tools from the chuck and turret, respectively, measure workpieces and tools for quality control, and track available storage, overriding or skipping individual machining instructions as dictated by safety parameters and the availability of raw materials and tools.