Abstract: The present invention provides a lathe that is provided with an eccentricity adjustment mechanism that makes it possible for electrical components that are readily affected by the environment to be eliminated from the turntable; for slip rings in particular, which exhibit problems in terms of the durability of signal transmission during high-speed rotation, to be eliminated as well, and for safe and stable adjustment of workpiece eccentricity to be easily achieved. A lathe provided with an eccentricity adjustment mechanism, in which a linear motion guide unit (6) is provided in an inclined state in an engaging part of the center part of a turntable (1) and an axial-direction-movement part (5A) of a center shaft (5); and, due to the center shaft (5) being moved, the turntable (1) moves in the radial direction by the radial pressing force generated by the linear motion guide unit (6) being inclined, and the eccentricity of the workpiece (3) is adjusted.

Abstract: The present invention provides a machine tool provided with a cover body having a simple structure, excellent operability, and low manufacturing cost. A tool post movement region one-side-closing cover part (9) for closing a tool post movement region open part (8) is configured so as to be: capable of expanding and contracting in a horizontal movement direction of a tool post (3); arranged facing the tool post (3); elongated by urging means (10) to press against the tool post (3) in a relatively slidable manner and close the tool post movement region open part (8); expanded and contracted by movement of the tool post (3) to hold the tool post movement region open part (8) in a closed state; and provided unconnected to the tool post (3) so that the tool post (3) is relatively slidable with respect to the tool post movement region open part (8) is held in a closed state.

Abstract: The present invention provides a method for accurately and simply measuring a blade width (W) of a blade tip section (1) of a grooving tool mounted on a machine tool.

Abstract: The present invention provides a lathe that is provided with an eccentricity adjustment mechanism that makes it possible for electrical components that are readily affected by the environment to be eliminated from the turntable; for slip rings in particular, which exhibit problems in terms of the durability of signal transmission during high-speed rotation, to be eliminated as well, and for safe and stable adjustment of workpiece eccentricity to be easily achieved. A lathe provided with an eccentricity adjustment mechanism, in which a linear motion guide unit (6) is provided in an inclined state in an engaging part of the center part of a turntable (1) and an axial-direction-movement part (5A) of a center shaft (5); and, due to the center shaft (5) being moved, the turntable (1) moves in the radial direction by the radial pressing force generated by the linear motion guide unit (6) being inclined, and the eccentricity of the workpiece (3) is adjusted.

Abstract: The present invention provides a machine tool provided with a cover body having a simple structure, excellent operability, and low manufacturing cost. A tool post movement region one-side-closing cover part (9) for closing a tool post movement region open part (8) is configured so as to be: capable of expanding and contracting in a horizontal movement direction of a tool post (3); arranged facing the tool post (3); elongated by urging means (10) to press against the tool post (3) in a relatively slidable manner and close the tool post movement region open part (8); expanded and contracted by movement of the tool post (3) to hold the tool post movement region open part (8) in a closed state; and provided unconnected to the tool post (3) so that the tool post (3) is relatively slidable with respect to the tool post movement region one-side-closing cover part (9), and the tool post movement region open part (8) is held in a closed state.

Abstract: The present invention provides a method for accurately and simply measuring a blade width (W) of a blade tip section (1) of a grooving tool mounted on a machine tool.

Abstract: A machine tool in which a fluid discharge port (4) for discharging a fluid (F) supplied from a fluid supply unit is provided to a rake surface (3) of a blade tip section (2) provided at a distal end section of the cutting tool (1), which cuts the workpiece (W), and the fluid (F) is discharged from the fluid discharge port (4) toward a rake-surface (2)-facing surface of chips (D) from the workpiece (W) that slide in pressure contact with the rake surface (3), the fluid (F) discharged from the fluid discharge port (4) reducing the force with which the chips (D) that slide in pressure contact with the rake surface (3) make pressure contact with the rake surface (3), and reducing the amount of frictional heat generated by the chips (D) sliding in pressure contact with the rake surface (3).

Abstract: There is provided a wheel lathe in which the wheelset center of wheels and a spindle center can be aligned in a simple structure without using a centering part for synchronous lowering from above, and the horizontal distance from the wheelset center is measured at the position of a point along the circumference of the wheel and away from the topmost point of the wheel, such as of a point on an external edge, by a displacement meter having a fixed height, whereby the appropriate required lifting amount (lifter-required displacement) is automatically computed and the wheels are raised to allow the spindle to be appropriately fixed on a consistent basis, the device to be simplified and otherwise improved, and significant reductions to be attained in assembly and adjustment man-hours.

Abstract: There is provided a wheel lathe in which the wheelset center of wheels and a spindle center can be aligned in a simple structure without using a centering part for synchronous lowering from above, and the horizontal distance from the wheelset center is measured at the position of a point along the circumference of the wheel and away from the topmost point of the wheel, such as of a point on an external edge, by a displacement meter having a fixed height, whereby the appropriate required lifting amount (lifter-required displacement) is automatically computed and the wheels are raised to allow the spindle to be appropriately fixed on a consistent basis, the device to be simplified and otherwise improved, and significant reductions to be attained in assembly and adjustment man-hours.