A drilling device having a motor for driving a tool received in a tool holder, wherein the motor is coupled to a power source providing electrical operating power, and having a first switch for switching on the motor. A temperature switching element is provided, which is reversibly transferred from a first switching position to a second switching position, which shuts off the motor when the limit temperature of the switched-on motor is exceeded. For cooling the motor, the first switch and the temperature switching element are connected such that in the second switching position of the temperature switching element, it is possible to switch on the motor by pressing and holding the first switch. Moreover, the invention relates to a method for operating a drilling device.

A drilling device having a motor for driving a tool received in a tool holder, wherein the motor is coupled to a power source providing electrical operating power, and having a first switch for switching on the motor. A temperature switching element is provided, which is reversibly transferred from a first switching position to a second switching position, which shuts off the motor when the limit temperature of the switched-on motor is exceeded. For cooling the motor, the first switch and the temperature switching element are connected such that in the second switching position of the temperature switching element, it is possible to switch on the motor by pressing and holding the first switch. Moreover, the invention relates to a method for operating a drilling device.

A controller for a tool drive that collects force data and displacement data from the tool drive. The controller generates a stiffness model representing a workpiece using the force data and the displacement data. The controller further collects a force signal from the tool drive. The controller determines deflection of the workpiece using the force signal and stiffness model. The controller determines a resonant frequency of the workpiece using the stiffness model. The controller modifies an oscillation frequency and/or a rotational frequency of a spindle of the tool drive based on the resonant frequency. The controller also determines a location of a tip of the tool drive using the force signal.

A controller for a tool drive that collects force data and displacement data from the tool drive. The controller generates a stiffness model representing a workpiece using the force data and the displacement data. The controller further collects a force signal from the tool drive. The controller determines deflection of the workpiece using the force signal and stiffness model. The controller determines a resonant frequency of the workpiece using the stiffness model. The controller modifies an oscillation frequency and/or a rotational frequency of a spindle of the tool drive based on the resonant frequency. The controller also determines a location of a tip of the tool drive using the force signal.

In one aspect, a swiss-type machine tool is provided that includes a workpiece holding shaft, a workpiece supporting shaft, and a tool holder associated with the workpiece supporting shaft for holding at least one tool. The machine tool includes a drive operable to rotate the workpiece holding shaft and the workpiece supporting shaft around an axis. The workpiece holding shaft has a work holder configured to secure a workpiece to the workpiece holding shaft. The workpiece holding shaft is axially shiftable relative to the workpiece supporting shaft to adjust a position of the workpiece relative to the workpiece supporting shaft. The machine tool further includes a removable workpiece support, such as a guide bushing, configured to be releasably connected to the workpiece supporting shaft and rotate therewith. The workpiece support slidably contacts the workpiece and permits axial movement of the workpiece relative to the workpiece support.

In one aspect, a swiss-type machine tool is provided that includes a workpiece holding shaft, a workpiece supporting shaft, and a tool holder associated with the workpiece supporting shaft for holding at least one tool. The machine tool includes a drive operable to rotate the workpiece holding shaft and the workpiece supporting shaft around an axis. The workpiece holding shaft has a work holder configured to secure a workpiece to the workpiece holding shaft. The workpiece holding shaft is axially shiftable relative to the workpiece supporting shaft to adjust a position of the workpiece relative to the workpiece supporting shaft. The machine tool further includes a removable workpiece support, such as a guide bushing, configured to be releasably connected to the workpiece supporting shaft and rotate therewith. The workpiece support slidably contacts the workpiece and permits axial movement of the workpiece relative to the workpiece support.

A lateral processing machine includes an upper beam and a lower beam extending in an X direction; upper and lower X guides extending in the X direction; a first moving column including a first connection block on the upper X guide to move in the X direction, a second connection block on the lower X guide to move in the X direction, and a first column portion connecting the first connection block and the second connection block; a pair of first Y guides extending in the Y direction; a first Y table movable in the Y direction; and a first processing unit detachably attached to the first Y table and including a first ram movable in a Z direction and a first spindle supported by the first ram.

A lateral processing machine includes an upper beam and a lower beam extending in an X direction; upper and lower X guides extending in the X direction; a first moving column including a first connection block on the upper X guide to move in the X direction, a second connection block on the lower X guide to move in the X direction, and a first column portion connecting the first connection block and the second connection block; a pair of first Y guides extending in the Y direction; a first Y table movable in the Y direction; and a first processing unit detachably attached to the first Y table and including a first ram movable in a Z direction and a first spindle supported by the first ram.

An example method includes performing a machining operation by providing linear movement of a tool along a feed axis relative to a workpiece while superimposing oscillation of the tool onto the feed axis and providing rotation of the tool relative to the workpiece. During an optimization mode, the machining operation is performed on a first workpiece portion while providing the linear movement at an initial feed velocity, and sequentially superimposing the oscillating at a plurality of different frequencies. An optimal oscillation frequency is determined from the plurality of different frequencies which causes the tool to apply less force to the first workpiece portion at the initial feed velocity than others of the frequencies. During a run mode, the machining operation is performed on a second workpiece portion having a same composition as the first workpiece portion while superimposing the oscillation at the optimal oscillation frequency.

A machine tool provided with a tool spindle and a work table for supporting a workpiece for plastic forming on a workpiece with a tool attached to the tool spindle. The partially curved tool is has a moving mechanism to move the tool spindle relative to the workpiece, a spindle rotating motor to turn the tool spindle relative to the workpiece, a movement control unit to control the moving mechanism to move the tool along the workpiece while pressing a curved portion on the surface to be machined, and a turn control unit to control the spindle rotating motor to orient a normal line of the curved portion toward the surface of the workpiece at a reference position taken as a reference.