An elliptical ultrasonic machining device powered by non-contact induction mainly includes an induction power supply device and an elliptical ultrasonic spindle shank, wherein: induction power supply secondary units of the induction power supply device encircle a spindle shank shell of the elliptical ultrasonic spindle shank; induction power supply primary units are arranged at a primary magnetic core seat outside the elliptical ultrasonic spindle shank; the primary magnetic core seat and the elliptical ultrasonic spindle shank have a same circle center, and a small gap exists between the primary magnetic core seat and the elliptical ultrasonic spindle shank; the primary magnetic core seat is fastened on a machine tool spindle seat of a machine tool through a support and keeps still; the elliptical ultrasonic spindle shank is mounted on a machine tool spindle through a taper shank and rotates with the spindle in a high speed.

A replaceable tool holder includes a connector adapted to be engaged with and driven to rotate by a spindle, a tool chuck, of which an end is detachably engaged with the connector and another end is adapted to engage a tool, and an electronic component provided in a chamber inside the tool chuck. The connector is provided with a non-contact power transmission device. A passage is provided in the connector and the tool chuck, wherein a wire is disposed in the passage, transmitting electric power to serve the need of the electronic component. With such design, one connector can be used to connect tool chucks of different types or models. Therefore, a user could, as required, replace the connecting interface between the tool holder and the spindle or the connecting interface between the tool holder and the tool. Furthermore, the electronic component could be steadily supplied with electric power.

Provided is an ultrasonic vibration processing device which can suppress vibration of components due to an ultrasonic vibrator and can perform processing using ultrasonic vibration in a preferable manner.

The ultrasonic vibration processing device includes: a housing (10); an ultrasonic vibrator (20) including a horn portion (21A) to which a tool holder (70) is detachably attached and a piezoelectric element (23), the ultrasonic vibrator having a rear end located at a node of ultrasonic vibration and being supported inside the housing (10) so as to be rotatable; a connecting portion (30) stored in the housing (10) so as to be rotatable together with the ultrasonic vibrator (20); a motor (40) connected to the connecting portion (30); and a non-contact power supply unit (50) including a primary transformer (51) and a secondary transformer (52), the primary transformer (51) being fixed to the housing (10) and including a primary coil (51B) that receives high frequency power from an external power supply, the secondary transformer (52) being connected to the rear end of the ultrasonic vibrator (20) with a clearance maintained between the secondary transformer (52) and the primary transformer (51) and including a secondary coil (52B) that supplies an induced electromotive force to the piezoelectric element (23).

A method for processing a workpiece on a numerically controlled machine tool by a tool includes the steps of: controlling a relative movement of the tool relative to the workpiece for processing the workpiece, producing an ultrasonic vibration of the tool by an ultrasonic generator, detecting at least one sensor signal outputted from the ultrasonic generator and identifying a change in the material at the workpiece while controlling the relative movement of the tool relative to the workpiece on the basis of the at least one sensor signal outputted from the ultrasonic generator.

A high frequency vibration spindle system with non-contact power transmission and a method for manufacturing a restraining part used therein are disclosed. The high frequency vibration spindle system comprises: a spindle; a toolholder; an electric power transmission device including a first induction module and a second induction module, wherein the second induction module is disposed at the spindle or the toolholder, and the second induction module is adapted to receive an electric power from the first induction module in a non-contact electromagnetic induction manner; a transducer adapted to be controlled to vibrate the tool and being disposed at the toolholder and electrically connected with the second induction module to receive the electric power; and a restraining part located between the first induction module and the second induction module. By the design of the restraining part, the structural strength and stability of the second induction module can be improved, and the maximum rotational speed of the high frequency vibration spindle system can be increased.

Disclosed techniques include creating a pressure differential within an interior of a dual-wall component relative to pressure at an exterior of the dual-wall component, fabricating a hole in a first wall of the dual-wall component, while fabricating the hole in the first wall of the dual-wall component, acoustically monitoring the hole fabrication, while acoustically monitoring the hole fabrication, detecting breakthrough of the first wall of the dual-wall component based on an acoustic signal due to gas passing through the fabricated hole, and based on the acoustic signal, ceasing the fabrication of the hole.

A micromachining method, a die manufacturing method, and a micromachining apparatus performing accurate micromachining on a surface of a workpiece at high speed. A micromachining apparatus having a cutting tool and a vibration unit for vibrating the cutting tool in a first direction is used. The angle formed between an average cutting direction of the cutting tool and the first direction is set to fall within a range of 20 to 120. Recesses and protrusions are formed on a surface of a workpiece as a result of machining by the cutting tool which is vibrating in the first direction.

A vibration cutting insert includes a top surface having a rake face and a breaker face, a first side surface, a second side surface, and a bottom surface. In a cross section which includes a bisector of an angle formed between a first ridgeline and a second ridgeline when viewed in a direction from the top surface toward the bottom surface, and which is parallel to the direction from the top surface toward the bottom surface, a rake angle formed between the rake face and a plane parallel to the bottom surface has a positive angle. The angle formed between the first ridgeline and the second ridgeline is an acute angle. The rake face constitutes a cylindrical surface. The breaker face constitutes a flat surface.

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.

The present invention provides a method for locating a machining position in a repair material that is arranged on a member including a machined portion formed by predetermined machining, the method including: a step of arranging a marker including a portion having a different propagation characteristic of an ultrasonic wave from that of a peripheral portion in the machined portion existing in the member before the repair material is arranged on the member; and a step of applying the ultrasonic wave to the member covered with the repair material and locating the machining position at a position of the marker captured by the ultrasonic wave after the repair material is arranged on the member.