A method and apparatus for machining an internal surface of a differential case. A lathe having a turret and a pair of spindles are in electrical communication with a programmable computer. Integrally connected to the turret is a cutter gripper assembly that is selectively grippingly engageable with a cutter. A differential case is mounted horizontally within a mount assembly on a tabletop of the lathe. Once the cutter gripping assembly engages the cutter, the turret moves toward the differential case until the cutter is in a start position within the hollow portion of the case aligned with openings in a first and second tubular portion of the case and the pair of spindles. The pair of spindles then drivingly engage the cutter and the cutter machines a first and second internal machining surface as the cutter moves from a first cutting position to a second cutting position.

A method and apparatus for machining an internal surface of a differential case. A lathe having a turret and a pair of spindles are in electrical communication with a programmable computer. Integrally connected to the turret is a cutter gripper assembly that is selectively grippingly engageable with a cutter. A differential case is mounted horizontally within a mount assembly on a tabletop of the lathe. Once the cutter gripping assembly engages the cutter, the turret moves toward the differential case until the cutter is in a start position within the hollow portion of the case aligned with openings in a first and second tubular portion of the case and the pair of spindles. The pair of spindles then drivingly engage the cutter and the cutter machines a first and second internal machining surface as the cutter moves from a first cutting position to a second cutting position.

A miniaturized turbogenerator (200) to directly provide electrical propulsion (307 308, 309) to small land, air, and maritime vehicles without an intervening electricity storage battery (315). The invention comprises of a process of miniaturization (500) of a turbine engine core (100), in particular its compressors and turbines (400), by means of hyper-feed machining by linear force alone, i.e. without rotation of either the workpiece or the cutting tool (505), and a resulting apparatus of a miniaturized turbogenerator (200) that has sufficient power density to provide high-performance electrical propulsion (310) for commercially feasible automobiles, urban air mobility vehicles, and other small vehicles and vessels with greater performance than battery-electric vehicles (300).

A miniaturized turbogenerator (200) to directly provide electrical propulsion (307 308, 309) to small land, air, and maritime vehicles without an intervening electricity storage battery (315). The invention comprises of a process of miniaturization (500) of a turbine engine core (100), in particular its compressors and turbines (400), by means of hyper-feed machining by linear force alone, i.e. without rotation of either the workpiece or the cutting tool (505), and a resulting apparatus of a miniaturized turbogenerator (200) that has sufficient power density to provide high-performance electrical propulsion (310) for commercially feasible automobiles, urban air mobility vehicles, and other small vehicles and vessels with greater performance than battery-electric vehicles (300).

Provided is a lathe capable of facilitating replacement of a ball screw. A machine tool comprises a base, a moving unit, a ball screw, a cap, and a supporting unit provided on the base to support the cap. The cap has a body and a flange expanded larger than the body on the outer side thereof with respect to the axis direction. The supporting unit comprises a recess part which receives the body. The recess part is provided with an opening allowing the threaded shaft to pass in a direction perpendicular to the axis direction in the state that the supporting unit is provided on the base. The supporting unit further comprises a positioning part on which an inner surface of the flange abuts in the axis direction in the state that the body is received in the recess part.

Provided is a lathe capable of facilitating replacement of a ball screw. A machine tool comprises a base, a moving unit, a ball screw, a cap, and a supporting unit provided on the base to support the cap. The cap has a body and a flange expanded larger than the body on the outer side thereof with respect to the axis direction. The supporting unit comprises a recess part which receives the body. The recess part is provided with an opening allowing the threaded shaft to pass in a direction perpendicular to the axis direction in the state that the supporting unit is provided on the base. The supporting unit further comprises a positioning part on which an inner surface of the flange abuts in the axis direction in the state that the body is received in the recess part.

The drilling machine includes a spindle, a spindle motor, a frame including, a linear motion guide support plate, a motor support portion, and a ram support plate disposed at a front end of the linear motion guide support plate, and having a height lower than the motor support portion, a linear motion guide disposed on the reference surface, a slider having a nut mounting hole to reciprocate along the linear motion guide, and having a height substantially the same as the motor support portion, a ram penetrating the first ram guide hole, a feed screw including a screw shaft having a rear end supported by the motor support portion and a front end that is a free end, and a nut fastened to the nut mounting hole; and a feed motor connected to the screw shaft.

The drilling machine includes a spindle, a spindle motor, a frame including, a linear motion guide support plate, a motor support portion, and a ram support plate disposed at a front end of the linear motion guide support plate, and having a height lower than the motor support portion, a linear motion guide disposed on the reference surface, a slider having a nut mounting hole to reciprocate along the linear motion guide, and having a height substantially the same as the motor support portion, a ram penetrating the first ram guide hole, a feed screw including a screw shaft having a rear end supported by the motor support portion and a front end that is a free end, and a nut fastened to the nut mounting hole; and a feed motor connected to the screw shaft.

A method and apparatus for producing a hole in any material by means of controlled fracturing using non-spindle CNC machining includes the steps of: fixturing a workpiece to the table of a non-spindle CNC holemaking machine tool. The cutting tool is then secured to the column of the machine tool and the face of the cutting tool is positioned perpendicular to the centerline of the proposed hole. The surface of the workpiece is approached with the cutting tool to a predetermined clearance level. Thereafter, the cutting tool is driven with sufficient linear force to induce instantaneous strain in the material of the workpiece to a depth necessary to create a hole of a desired size and shape using a drive mechanism. The cutting tool is then repositioned so that the face of cutting tool is perpendicular to centerline of a subsequent hole to be produced.

A method and apparatus for producing a hole in any material by means of controlled fracturing using non-spindle CNC machining includes the steps of: fixturing a workpiece to the table of a non-spindle CNC holemaking machine tool. The cutting tool is then secured to the column of the machine tool and the face of the cutting tool is positioned perpendicular to the centerline of the proposed hole. The surface of the workpiece is approached with the cutting tool to a predetermined clearance level. Thereafter, the cutting tool is driven with sufficient linear force to induce instantaneous strain in the material of the workpiece to a depth necessary to create a hole of a desired size and shape using a drive mechanism. The cutting tool is then repositioned so that the face of cutting tool is perpendicular to centerline of a subsequent hole to be produced.