A tool holding part holds two boring bars in a manner in which axes of the boring bars are parallel to a spindle axis. A tool change mechanism has a circular arc movement mechanism in which the boring bar moves from a tool holding position to a tool change position by at least a circular arc movement on a plane surface including an axis of the spindle in the tool change position and an axis of the boring bar positioned in the tool holding part.

A machine tool has a clamping device for clamping in workpieces to be machined, a work spindle which is movable relative to the clamping device, a tool magazine wherein tools for machining the workpieces are held available, the tools being selectively clamped into the work spindle, and a spindle gripper to be selectively clamped into the work spindle and being self-holding in its gripping position, said spindle gripper being held available in the tool magazine and being movable between a transfer position to the work spindle and an unloading station in which the spindle gripper releases a work piece remnant received from the clamping device.

Even with a simple structure, tool exchange can be efficiently performed. Provided is a tool switching/holding device including: a base; a Y-axis slide base; a Y-axis actuator that moves the Y-axis slide base in a Y-axis direction; X-axis slide bases that are provided on the Y-axis slide base; tool mounting members that are provided on the X-axis slide bases and on which a tool is mounted; an X-axis actuator that selectively holds one of the tool mounting members and that moves the held tool mounting member in the X-axis direction; and a retreating/locking sections that cause the tool mounting member other than the tool mounting member that is selectively held by the X-axis actuator to retreat to a position away from the X-axis actuator in the Y-axis direction or the X-axis direction and that lock the retreating tool mounting member.

A blocking device of tool-holders on lathes, especially for the rapid and precise blocking of tool-holders on CNC (Computer Numerical Control), single spindle or multi-spindle lathes as well as on transfer machines, milling centres of any kind and, in general, on machine tools which perform machining by chip removal, is paired with a tool-holder, motorized or non-motorized, connected to the existing support on said lathes and comprises an anchoring pawl provided with a female truncated-cone shaped recess. Said pawl is moved vertically with respect to the longitudinal axis of said tool-holder by mechanical or hydraulic means driven to engage said female, truncated-cone shaped recess with an inclined, male truncated-cone appendage made on said tool-holder.

A moving mechanism brings the rotational axis of each driven rotator into alignment with the rotational axis of a drive rotator, which has an engaging face extending along its rotational axis. Each driven rotator has an engageable face extending along the rotational axis of the drive rotator. Rotating the drive rotator while moving the driven rotator, of which the rotational axis is aligned with the rotational axis, toward the drive rotator will bring the engaging face into engagement with the engageable face.

A blocking device of tool-holders on lathes, especially for the rapid and precise blocking of tool-holders on CNC (Computer Numerical Control), single spindle or multi-spindle lathes as well as on transfer machines, milling centres of any kind and, in general, on machine tools which perform machining by chip removal, is paired with a tool-holder, motorized or non-motorized, connected to the existing support on said lathes and comprises an anchoring pawl provided with a female truncated-cone shaped recess. Said pawl is moved vertically with respect to the longitudinal axis of said tool-holder by mechanical or hydraulic means driven to engage said female, truncated-cone shaped recess with an inclined, male truncated-cone appendage made on said tool-holder.

The invention relates to a bending tool storage device (1) for storing bending tools (2), comprising at least one storage unit (3), which comprises an outer tool storage (4) which is ring-shaped or partial-ring-shaped and has a plurality of guide rails (14) for holding and guiding bending tools (2), characterized in that the storage unit (3) comprises at least one inner tool storage (5, 6) which is arranged inside the outer tool storage (4) and has a plurality of guide rails (15, 16) for holding and guiding bending tools (2), and in that the outer tool storage (4) and the inner tool storage (5, 6) are rotatable relative to one another, wherein, in different positions of relative rotation between outer tool storage (4) and inner tool storage (5), at least one guide rail (14) of the outer tool storage (4) is in each case in aligned orientation with another guide rail (15, 16) of the inner tool storage (5, 6).

A protection tool for an electronic drill provides various functions when drilling is carried out. The electronic drill has a front end with a through hole located at the front end and a drill head extending through out the through hole. The protection tool is moveably mounted at the front end of the electronic drill along an operation direction. A guard plate includes a pore aligning with the through hole and provides pass way for the drill head. A supporting frame is assembled with the guard plate and is moveably mounted at the front end of the electronic drill along the operation direction, so that the guard plate is positioned at a variable distance from the front end according to the movement of the supporting frame with respect to the front end.

A controller of a cutting device includes a first reference point detection processor detecting an actual position of a first reference point on a top surface of a first protrusion of a magazine, a second reference point detection processor detecting an actual position of a second reference point on a top surface of the second protrusion of the magazine, a sensor offset calculation processor calculating an offset of an actual position of a tool sensor of the magazine with respect to a designed position of the tool sensor based on the first reference point and the second reference point, a stocker offset calculation processor calculating an offset of an actual position of the stocker of the magazine with respect to a designed position of the stocker based on the first reference point and the second reference point, and a movement control processor controlling a movement mechanism based on the offset of the tool sensor and the offset of the stocker.

A manufacturing machine is capable of subtractive manufacturing and additive manufacturing for a workpiece. The manufacturing machine includes: a first headstock and a second headstock disposed in a machining area and configured to hold a workpiece; a tool spindle and a lower tool rest disposed in the machining area and configured to hold a tool to be used for subtractive manufacturing for the workpiece: an additive manufacturing head configured to discharge a material during additive manufacturing for the workpiece a workpiece gripper configured to grip the workpiece during transportation of the workpiece into and out of the machining area; and a robot arm on which the additive manufacturing head and the workpiece gripper are mountable. Accordingly, the manufacturing machine improving the productivity in the simple and easy manner is provided.