A lathe system capable of manufacturing a long product from a bar by performing a grip change by a spindle during a machining cycle, the long product being of a length exceeding a movable range of the spindle, the spindle releasably gripping the bar and moving in a Z1-axis direction of the bar. The lathe system includes a pusher capable of moving in the Z1-axis direction together with the bar. The lathe system further includes a bar length shortage prior determination unit that determines whether the pusher is in a position permitting the grip change to be performed during the machining cycle. The determination is made prior to the start of the machining cycle.

A lathe system capable of manufacturing a long product from a bar by performing a grip change by a spindle during a machining cycle, the long product being of a length exceeding a movable range of the spindle, the spindle releasably gripping the bar and moving in a Z1-axis direction of the bar. The lathe system includes a pusher capable of moving in the Z1-axis direction together with the bar. The lathe system further includes a bar length shortage prior determination unit that determines whether the pusher is in a position permitting the grip change to be performed during the machining cycle. The determination is made prior to the start of the machining cycle.

A selecting device causes a machine tool, which machines a workpiece from a bar material, to select another workpiece that the machine tool can machine from a leftover material, which is a remaining part of the bar material being machined, when a workpiece to be machined is not machinable from the leftover material. The selecting device includes: a selecting unit that refers to mountable tool data indicating a tool that can be mounted on a mount position of the machine tool, and causes the machine tool to select another workpiece that is machinable by the tool that can be mounted on the machine tool, in selecting another workpiece to be machined by the machine tool from the leftover material.

Disclosed are a wheel lightweight machining fixture and method. The fixture comprises a rotating chuck, an electric cylinder, a guide rail, a slide block, a first linear motor, radial positioning blocks and the like. When the electric cylinder drives the slide block to move along the guide rail, the position where an first ultrasonic thickness measuring sensor is in contact with a wheel spoke can be adjusted, so that the spoke thicknesses at different positions can be detected. Through motion of the turrets, an second ultrasonic thickness measuring sensor can contact the outer rim of the wheel and detect the rim wall thickness. By integrating a measurement feedback system into the manufacturing process, the disclosure provides a fixture and a method for minimum entity machining of the rim wall thickness and the spoke thickness of a wheel during the first stage turning process, thereby realizing lightweight manufacturing of the wheel.

A machine tool includes a spindle capable of holding a workpiece and rotatable on a spindle axis and a tool post on which a tool is attachable to machine the workpiece held by the spindle. The tool post includes a first turnable holder turnable on a first turning axis perpendicular to the spindle axis. The first turnable holder has a first tool unit mounting part where a rotary tool is attachable. The tool post further includes a second turnable holder turnable on a second turning axis perpendicular to the spindle axis and different from the first turning axis. The second turnable holder has a second whirling tool mounting part where a thread whirling tool is attachable.

A machine tool includes a spindle capable of holding a workpiece and rotatable on a spindle axis and a tool post on which a tool is attachable to machine the workpiece held by the spindle. The tool post includes a first turnable holder turnable on a first turning axis perpendicular to the spindle axis. The first turnable holder has a first tool unit mounting part where a rotary tool is attachable. The tool post further includes a second turnable holder turnable on a second turning axis perpendicular to the spindle axis and different from the first turning axis. The second turnable holder has a second whirling tool mounting part where a thread whirling tool is attachable.

A control part of a control device includes a learning controller and a learning determination part. The learning controller performs learning control in which a correction amount of a resultant command is obtained, based on an oscillation phase obtained from an oscillation command and the resultant command, and the correction amount is added to the resultant command. The learning determination part determines whether or not the oscillation amplitude of the oscillation command is smaller than a predetermined threshold, and when the oscillation amplitude is smaller than the predetermined threshold value, the learning determination part both sets the oscillation command generated by an oscillation command generation part to zero and turns off the learning control or only turns off the learning control.

A lathe including a moving headstock designed to rotate and move forward a workpiece to be turned in relation to an axis of translation and rotation. A guide bush is designed to be attached to a frame of the lathe and includes a bush spindle and a clamping mechanism. The guide bush is designed to operate either in bush mode or in grip mode and is designed to be moveable axially in relation to the frame along the axis of translation and rotation. The lathe is arranged to operate in a first mode in which the guide bush is driven axially by the moving headstock, and a second mode in which the axial position of the guide bush is static in relation to the frame.

Disclosed is a multiple machining apparatus for, upon receiving a plastic cylindrical work piece therewithin, performing multiple machining operations thereon. The apparatus includes a rotary fixture capable of rotation; the rotary fixture includes a proximal means for snugly holding a proximal portion of the work piece, and a distal means for holding substantially the rest of the portion of the work piece. The apparatus further consists of a movable table with a blade holder for holding a plurality of blades, each of which corresponding to a machining operation, the movable table and thereby the blade holder is capable of movement along X, Y and Z axes. The apparatus performs multiple machining operations on the work piece by virtue of the rotation of the rotary fixture, rotation of the blades, and the movement of the movable table, working against the rotating work piece.

A numerical controller according to the present invention includes: a turning condition designation unit that designates a machining condition of turning; a nicking condition designation unit that designates a machining condition of nicking; a fixed cycle instruction analysis unit that generates an instruction sequence of a turning cycle operation based on the turning machining condition; and a nicking operation instruction generation unit that generates an instruction sequence of a nicking cycle operation based on the turning machining condition and the nicking machining condition. The numerical controller executes the instruction sequence of the nicking cycle operation before executing the instruction sequence of the turning cycle operation.