A rotary table device includes a table provided on one end-side of a main shaft rotatably supported in a frame; and a drive transmission mechanism transmit rotation of an output shaft of a drive motor to the main shaft and including a drive transmission member and accommodated in an accommodation space formed in the frame. The table is supported with respect to the frame by a bearing provided between a lower surface of the table and an upper surface of the frame, and a space is provided between the lower surface of the table and the upper surface of the frame. The frame is provided with a communication passage configured so that the space and the accommodation space communicate with each other.

A rotary table device includes a table provided on one end-side of a main shaft rotatably supported in a frame; and a drive transmission mechanism transmit rotation of an output shaft of a drive motor to the main shaft and including a drive transmission member and accommodated in an accommodation space formed in the frame. The table is supported with respect to the frame by a bearing provided between a lower surface of the table and an upper surface of the frame, and a space is provided between the lower surface of the table and the upper surface of the frame. The frame is provided with a communication passage configured so that the space and the accommodation space communicate with each other.

A tool for machining an object including a first part including a rotatable member that is rotatable to cause rotation of a machine tool, a second part, a joint coupling the first part and the second part to enable relative movement between the first part and the second part, and a sensor to sense an object to be machined.

A tool for machining an object including a first part including a rotatable member that is rotatable to cause rotation of a machine tool, a second part, a joint coupling the first part and the second part to enable relative movement between the first part and the second part, and a sensor to sense an object to be machined.

The invention provides a nested numerical control rotary table, which comprises a large numerical control rotary table, a small rotary table, a large rotary table board and a small rotary table board nested in the large rotary table board, wherein the small rotary table board may be driven by the large numerical control rotary table as a part of the large rotary table board to run together with the large rotary table board, or be driven by the small rotary table to run independently. When the small rotary table board runs independently, the small rotary table is driven to ascend by a lifting oil cylinder, and a pull pin under the small rotary table board and a positioning pin on the small rotary table fixedly connect the small rotary table board with the small rotary table, which are locked by a clamp. The nested numerical control rotary table may complete the tasks of numerical control rotary tables with both large and small dimensions, which saves the production cost and improves the working efficiency. Moreover, switch between the large rotary table and the small rotary table is convenient, so time is saved.

A receiving device for receiving an object of any shape includes a horizontally extending base plate with a plurality of threaded bores being defined in the base plate, where the plurality of threaded bores are spaced apart across the base plate. The receiving device further includes a plurality of supports, where each of the plurality of supports extends between a first end and a second end. Each of the plurality of supports is screwed proximate the first end into the plurality of threaded bores such that the second ends of the plurality of supports project vertically upward at a specific height from the base plate such that an object of any shape is placeable in a desired position on the second ends of the plurality of supports.

A receiving device for receiving an object of any shape includes a horizontally extending base plate with a plurality of threaded bores being defined in the base plate, where the plurality of threaded bores are spaced apart across the base plate. The receiving device further includes a plurality of supports, where each of the plurality of supports extends between a first end and a second end. Each of the plurality of supports is screwed proximate the first end into the plurality of threaded bores such that the second ends of the plurality of supports project vertically upward at a specific height from the base plate such that an object of any shape is placeable in a desired position on the second ends of the plurality of supports.

The invention provides a nested numerical control rotary table, which comprises a large numerical control rotary table, a small rotary table, a large rotary table board and a small rotary table board nested in the large rotary table board, wherein the small rotary table board may be driven by the large numerical control rotary table as a part of the large rotary table board to run together with the large rotary table board, or be driven by the small rotary table to run independently. When the small rotary table board runs independently, the small rotary table is driven to ascend by a lifting oil cylinder, and a pull pin under the small rotary table board and a positioning pin on the small rotary table fixedly connect the small rotary table board with the small rotary table, which are locked by a clamp. The nested numerical control rotary table may complete the tasks of numerical control rotary tables with both large and small dimensions, which saves the production cost and improves the working efficiency. Moreover, switch between the large rotary table and the small rotary table is convenient, so time is saved.

A machine tool with active damping is provided, having a ram with longitudinal walls wherein vibrations are produced during machining according to at least a main bending direction (D1, D2) of the ram, a head that is arranged at one free end of the ram, actuation means for actuating the head which are arranged on one of the longitudinal walls of the ram, and damping means configured to generate at least a force (F1, F2) in the main bending direction (D1, D2) of the ram, wherein the damping means are arranged in a partial cross section of the longitudinal wall of the ram wherein the actuation means are arranged, the partial cross section being located between the actuation means and the free end of the ram on which the head is arranged.

A machine tool with active damping is provided, having a ram with longitudinal walls wherein vibrations are produced during machining according to at least a main bending direction (D1, D2) of the ram, a head that is arranged at one free end of the ram, actuation means for actuating the head which are arranged on one of the longitudinal walls of the ram, and damping means configured to generate at least a force (F1, F2) in the main bending direction (D1, D2) of the ram, wherein the damping means are arranged in a partial cross section of the longitudinal wall of the ram wherein the actuation means are arranged, the partial cross section being located between the actuation means and the free end of the ram on which the head is arranged.