A tool change unit includes a base and two tool arms rotatably mounted on the base and respectively located on two sides of the base. Each arm body includes a position-returning element, a gripping element, and an actuation element. The position-returning element enables the tool arm to rotate for upward and downward moving between a first position and a second position. The gripping element functions to grip a main-axle tool or a magazine tool. The tool change unit is combinable with a power unit to form a tool change device. The power unit drives the tool change unit to do rotation or rotation and upward and downward movement.

A robotic tool changer for machining center includes a drive mechanism, a first motor, and a rotary seat which are mounted on a body. The drive mechanism includes a first rotating shaft, a second rotating shaft, a first swing arm, a second swing arm, and a linkage member. The first rotating shaft and the second rotating shaft are arranged in parallel. The first swing arm is connected to the first rotating shaft while the second swing arm is connected to the second rotating shaft. Two ends of the linkage member are pivotally connected to the first swing arm and the second swing arm respectively. An end of the second rotating shaft is fixed to the rotary seat. Thereby, when the first motor drives the first rotating shaft to rotate, the rotary seat is driven to turn over. Thereby, with the configuration of the first motor and the drive mechanism, the hydraulic oil leakage and the environmentally unfriendly subsequent treatment of the hydraulic oil when the hydraulic cylinder is used as a power source can be improved.

A robotic tool changer for machining center includes a drive mechanism, a first motor, and a rotary seat which are mounted on a body. The drive mechanism includes a first rotating shaft, a second rotating shaft, a first swing arm, a second swing arm, and a linkage member. The first rotating shaft and the second rotating shaft are arranged in parallel. The first swing arm is connected to the first rotating shaft while the second swing arm is connected to the second rotating shaft. Two ends of the linkage member are pivotally connected to the first swing arm and the second swing arm respectively. An end of the second rotating shaft is fixed to the rotary seat. Thereby, when the first motor drives the first rotating shaft to rotate, the rotary seat is driven to turn over. Thereby, with the configuration of the first motor and the drive mechanism, the hydraulic oil leakage and the environmentally unfriendly subsequent treatment of the hydraulic oil when the hydraulic cylinder is used as a power source can be improved.

A tool change unit includes a base and two tool arms rotatably mounted on the base and respectively located on two sides of the base. Each arm body includes a position-returning element, a gripping element, and an actuation element. The position-returning element enables the tool arm to rotate for upward and downward moving between a first position and a second position. The gripping element functions to grip a main-axle tool or a magazine tool. The tool change unit is combinable with a power unit to form a tool change device. The power unit drives the tool change unit to do rotation or rotation and upward and downward movement.

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.

A tool gripping arrangement for loading an elongate tool having a lengthwise axis into a collet. The tool gripping arrangement includes a tool clamp comprising a pair of tool clamp grippers for clamping the tool along a clamping axis. The tool gripping arrangement further includes a mounting arrangement for mounting the gripping arrangement to a robot arm, the tool clamp being mounted for free rotation relative to the mounting arrangement.