The present invention provides an electromagnetically driven fast tool servo system based on a flexible hinge combination mechanism, including a base, a voice coil motor arranged in the base, a tool mounting base connected to a coil of the voice coil motor by a first connecting portion, and a grating measurement device connected to the first connecting portion by a guide shaft arranged at a center of the voice coil motor, where the first connecting portion includes a first flexible hinge, a second flexible hinge, a first connecting member located between the first flexible hinge and the second flexible hinge, and a second connecting member located between the second flexible hinge and the coil of the voice coil motor; the tool mounting base, the first flexible hinge, the first connecting member, the second flexible hinge, the second connecting member, and an end of the guide shaft are coaxially connected in series by a first horizontal screw; the first flexible hinge and the second flexible hinge have sheet-like cross structures with the same shape, with end portions of cross arms fixedly connected to the base. In the present invention, axial and lateral precision of the system in a machining process is improved.

A spindle device is mountable with a tool holder, and includes a rotating spindle rotatably mounted to a spindle main body and extending axially to have an axial end surface. A contactless power transmission module is disposed on a flange end surface of the spindle main body and an outer peripheral wall of the rotating spindle for supplying power. An electrically connecting module includes two conductive units each disposed in the rotating spindle and electrically connected with the power transmission module. Each conductive unit has an electrically conductive post extending axially and exposed from the axial end surface for conducting the power to the tool holder.

A machine tool of high-frequency vibration is provided. A main shaft structure of the machine tool comprises a rotating shaft, the end of which is provided with a tool holder chuck for fixing a tool holder; the upper portion of which is provided with a rotating coil portion; the main shaft structure is correspondingly provided with a stationary coil portion; and the tool holder is provided with a high-frequency vibration module. By non-contact coils, an external electric power/signal can be transmitted into the high-frequency vibration module to avoid a wear phenomenon in a contact-rotating electrode. Because the inductive coil is arranged outside of the tool holder, the manufacturing cost of the tool holder is reduced, and the convenience of changing the tool holder is increased. Moreover, the machining stability and efficiency of the tool holder are improved by a control method of sensing/feedback signals with wireless transmission.

A spindle arrangement for a machine tool, comprising a spindle for driving a tool and at least one actuator for exciting vibration of the tool, characterized in that the spindle arrangement is provided with a compensation device for at least partly compensating the inertia forces produced by the vibration excitation in the spindle region.

A spindle device is mountable with a tool holder, and includes a rotating spindle rotatably mounted to a spindle main body and extending axially to have an axial end surface. A contactless power transmission module is disposed on a flange end surface of the spindle main body and an outer peripheral wall of the rotating spindle for supplying power. An electrically connecting module includes two conductive units each disposed in the rotating spindle and electrically connected with the power transmission module. Each conductive unit has an electrically conductive post extending axially and exposed from the axial end surface for conducting the power to the tool holder.

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 high frequency vibration spindle system which includes a spindle having a spindle housing and a spindle shaft disposed in the spindle housing; a toolholder, engaged with the spindle and adapted to be engaged with a tool; an electric power transmission device disposed at the front end or a rear end of the spindle, including a first coil and a second coil; the first coil is disposed on the spindle housing, and the second coil is disposed on the spindle shaft to be rotated with the spindle shaft coaxially; the first coil and the second coil are spaced with a gap; the second coil is adapted to receive an electric power from the first coil with a non-contact induction method; and a transducer, adapted to be controlled to vibrate the tool and disposed in the toolholder and electrically connected with the second coil to receive the electric power.

The present disclosure involves occasions where precise two-dimensional motion takes place, and is applicable to XY motion stages for precise displacement compensation. The present disclosure particularly involves a stiffness-frequency adjustable XY micromotion stage based on stress stiffening, which includes X-direction and Y-direction motion sub-stages and corresponding drivers and a micromotion working table. The micromotion stage uses membrane sets that have tension levels thereof adjusted by bolts as a flexible hinge, so as to achieve independent adjustment of the vibration frequency of the XY micromotion stage. The present disclosure implements the foregoing configuration based on prestressed membrane, so the frequency is adjustable. The inherent frequency of the micromotion stage can be adjusted before or during operation according to various working conditions and driving frequency. The two feed motion direction are perpendicular so as to prevent the micromotion working table from coupling during two-dimensional motion.

A high frequency vibration spindle system which includes a spindle having a spindle housing and a spindle shaft disposed in the spindle housing; a toolholder, engaged with the spindle and adapted to be engaged with a tool; an electric power transmission device disposed at the front end or a rear end of the spindle, including a first coil and a second coil; the first coil is disposed on the spindle housing, and the second coil is disposed on the spindle shaft to be rotated with the spindle shaft coaxially; the first coil and the second coil are spaced with a gap; the second coil is adapted to receive an electric power from the first coil with a non-contact induction method; and a transducer, adapted to be controlled to vibrate the tool and disposed in the toolholder and electrically connected with the second coil to receive the electric power.

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.