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 machine tool includes a tool rest including first holders each configured to hold a tool for an inner-diameter side and second holders each configured to hold a tool for an outer-diameter side, a machining control unit configured to control the tool rest to machine the workpiece, a tool changing unit, and a tool management unit configured to identify an unused tool. In a case where a plurality of tools of the same type are held by both the first and second holders, when the number of the first holders is larger than the number of the second holders, and one of the tools held by the second holders is identified as the unused tool, the tool changing unit changes the unused tool in the second holder with the tool in the first holder.

Provided is a method and a device for the computer-aided optimization of tool transportation operations for at least one tool magazine that has a number of magazine spaces and is used or is able to be used for a machine tool that is used to produce one or more workpieces with the aid of the tools provided at a provision space by a magazine device. The input comprises the set of tools and the space requirement of each tool and a permissible starting magazine occupancy. In step 1, a set of available time intervals is determined. In step 2, one or more tool transportation operations are assigned to a respective time interval under the condition that the movement period for the tool transportation operation is less than or equal to the length of the time interval. In step 3, one or more tool transportation operations are performed.

There is provided a blade replacing apparatus for replacing a cutting blade. The blade replacing apparatus includes a blade storage unit including a movable storage section configured to store the cutting blade, a transporting unit including a holding unit configured to hold the cutting blade and a moving mechanism configured to move the holding unit, a camera configured to photograph the holding unit, and a control unit including an operation control section configured to control operation of the blade storage unit and the transporting unit and a position registration section in which positions of the storage section and the holding unit. The storage section includes a first mark portion photographable by the camera, and the holding unit includes a second mark portion photographable by the camera.

A method of priming a minimum quantity lubrication (MQL) tool includes determining a category of the tool, supplying a short-prime MQL dosage if the tool is a first category or if both a second category and lubricated within a first predetermined timeframe, and supplying a long-prime MQL dosage if the tool is the second category and has not been lubricated within the predetermined timeframe. The category is based on internal passage complexity of the tool.

A method for the computer-aided optimization of tool transports for at least one tool magazine having a number of magazine locations, which is used for a machine tool for the production of one or more workpieces with the aid of the tools provided by a magazine device at a provision location, the method including: a) detecting a quantity of tools, b) determining the space required for each tool, c) detecting a quantity of occupiable magazine locations for each tool, d) detecting a permissible output magazine occupancy e) detecting the permissible target magazine occupancy, f) detecting a quantity of transport durations required for a journey of the magazine device, g) determining a partial quantity of tool transports for which a transport sequence is specifiable so that the tools are movable in the transport sequence, h) optimizing the transport sequence for the partial quantity of tool transports.

A machine tool for the shaping production of an article, including a tool receptacle, a tool feed, a stock of tools, and a controller, wherein the machine tool is configured to select one of the tools from the stock in dependence on the article to be produced and to fasten the article to the tool receptacle.

When the number of machining operations using a tool attached to a machining head of a machine tool has reached a predetermined number of machining operations for replacement, without a determination unit determining that an abnormality has occurred in the tool, then the tool is replaced with a replacement tool that is held in a tool magazine. Further, the tool removed from the machining head is returned to the tool magazine and stored as an auxiliary replacement tool. Then, if the determination unit determines that an abnormality has occurred in the replacement tool, the replacement tool is replaced with the auxiliary replacement tool.

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.

A removable die of a joining tool comprising a die head having an upper side, a bottom side and a die shaft extending from the bottom side and receivable and lockable in a die dome without rotation. The die shaft comprises: at least one first radial web forming an axial undercut on two sides by which the die shaft is lockable in the die dome by a linear inserting movement, at least one second exposed radial web, the radial length of which is adaptable to a diameter of the die dome to ensure a lateral guiding of the die shaft in the die dome and which is arranged between the die head and the first radial web, and an ejection surface by which the removable die can be moved out of the die dome and which is arranged at the free end of the die shaft opposite to the die head.