Abstract: A chuck device for holding a plate material workpiece supplied to a machine tool without deforming the workpiece is provided. A housing has a workpiece contact surface arranged to face workpiece holding claws, and when holding of a workpiece is released, a plurality of rods integrally swings so that the workpiece holding claws are moved away from the workpiece contact surface of the housing and moved away from each other, and when holding the workpiece, after the plurality of rods integrally swing so that the workpiece holding claws are brought close to the workpiece contact surface of the housing and brought close to each other, the plurality of rods moves integrally in parallel with the forward/backward moving direction of a drive body to bring the workpiece holding claws into contact with the workpiece.

Abstract: In an embodiment, a machine tool includes two fixed modules and two movable modules each of which having a main spindle, a headstock, and a tool post being integrally formed, and a bed on which these are installed. The movable modules are provided on the bed to be movable in the Y-axis direction, the fixed modules are fixed on the bed on the opposite sides of the these movable modules, and a recess is provided next to the fixed module, the recess being formed by cutting out the bed. The movable modules are movable such that the axis lines of the main spindles of the movable modules are aligned with the axis line of the main spindle of the fixed module or the fixed module. The movable module is movable to the opposite position of the recess.

Abstract: In an embodiment, a machine tool includes two fixed modules and two movable modules each of which having a main spindle, a headstock, and a tool post being integrally formed, and a bed on which these are installed. The movable modules are provided on the bed to be movable in the Y-axis direction, the fixed modules are fixed on the bed on the opposite sides of the these movable modules, and a recess is provided next to the fixed module, the recess being formed by cutting out the bed. The movable modules are movable such that the axis lines of the main spindles of the movable modules are aligned with the axis line of the main spindle of the fixed module or the fixed module. The movable module is movable to the opposite position of the recess.

Abstract: A set means for setting a workpiece (11) is provided behind a main shaft (4), the front end of which is provided with a chuck (8) that opens and closes freely, and is disposed so as to support the workpiece (11) with the chuck central axis line (C1) of the chuck (8) and the workpiece central axis line (C2) of the workpiece (11) positioned on a single line. The orientation of a workpiece (11)-holding means (53) of a conveyance means (56) for conveying the workpiece (11) between the set means (41) and the main shaft (4) is configured to be maintained when transferring the workpiece (11) between the holding means and the set means (41) and when transferring between the holding means and the chuck (8).

Abstract: A set means for setting a workpiece (11) is provided behind a main shaft (4), the front end of which is provided with a chuck (8) that opens and closes freely, and is disposed so as to support the workpiece (11) with the chuck central axis line (C1) of the chuck (8) and the workpiece central axis line (C2) of the workpiece (11) positioned on a single line. The orientation of a workpiece (11)-holding means (53) of a conveyance means (56) for conveying the workpiece (11) between the set means (41) and the main shaft (4) is configured to be maintained when transferring the workpiece (11) between the holding means and the set means (41) and when transferring between the holding means and the chuck (8).

Abstract: A machine tool assembly having a base assembly movable relative to a support selectively a) oppositely parallel to a first line, and b) oppositely parallel to a second line that is orthogonal to the first line, and a first spindle headstock movable with the base assembly and having a central axis extending parallel to the first line and a working end. The machine tool assembly further includes a first turret assembly movable with the base assembly and having a first turret headstock and a first turret head that is movable around a first axis relative to the first turret headstock. The first turret head is movable selectively into first and second different angular positions around the first axis relative to the first turret headstock.

Abstract: A machine tool assembly having a base assembly movable relative to a support selectively a) oppositely parallel to a first line, and b) oppositely parallel to a second line that is orthogonal to the first line, and a first spindle headstock movable with the base assembly and having a central axis extending parallel to the first line and a working end. The machine tool assembly further includes a first turret assembly movable with the base assembly and having a first turret headstock and a first turret head that is movable around a first axis relative to the first turret headstock. The first turret head is movable selectively into first and second different angular positions around the first axis relative to the first turret headstock.