A numerical controller controls a machine tool that performs a turning on a workpiece on the basis of a cycle instruction indicated by an NC program. The machine tool includes first and second cutter holders that are mutually coupled by a coupling member, and first and second tools are mounted on the cutter holders in mutually opposing fashion. The machine tool performs a turning according to a complex fixed cycle, in a reciprocal fashion rather than unidirectionally, using the first and second tools, and when the turning by the first tool has been completed and the first tool that has performed a turning is withdrawn, it is possible to perform a turning in the opposite direction by the second tool on the opposite side.

An equipment for a machining lathe with digital control comprising a movable carriage, a tool support system with integrated drive which is mounted so as to pivot on this movable carriage so as to be able to pivot about a pivot axis, as well as a device for actuating the tool support system with integrated drive with respect to the movable carriage. The tool support system with integrated drive comprises at least one mounting location to detachably receive a detachable accessory to support and drive a tool.

In accordance with one aspect, a vertical machine tool is provided having an upper headstock with an upper spindle and a lower tailstock with a lower spindle. A workpiece is secured to the lower tailstock and the headstock drives the upper spindle and a milling tool connected thereto at high speeds for milling the workpiece. The vertical machine tool is also operable to perform turning operations on the workpiece using a turning tool connected to the headstock spindle. The headstock has a mechanical spindle lock that may be configured to rigidly fix the headstock spindle to the headstock housing so that, during the turning operation, the headstock spindle is secured against rotation from loading applied to the turning tool held in the headstock spindle. The lower tailstock drives the lower spindle to rotate the workpiece at speeds up to 2,500 RPM while the non-rotating turning tool held in the upper headstock machines the workpiece.

A headstock assembly for a machine tool includes a mount having a female threaded bore, a headstock mounted slidably relative to the machine base, a drive member mounted on the headstock, a spindle, and a spindle extension. The spindle has an intermediate segment disposed in a chamber of the headstock and coupled to be driven by the drive member so as to permit the spindle to rotate about a spindle axis. The spindle extension is coupled to be rotatable with the spindle, and has a male threaded segment configured to be in threaded engagement with the female threaded bore so as to permit the headstock to be linearly moved relative to the mount.

A turning and thread-rolling machine with a pre-compression device includes a fixing base on which the pre-compression device, a fixing mechanism, a guiding base, a processing mechanism assembly, and a control unit are provided, wherein the pre-compression device includes a carrier and at least two cold-rolling heads in order to form by compression a pre-compressed annular groove in a portion of an unprocessed rebar that is adjacent to one end thereof, and, under the control of the control unit, the fixing mechanism clamps the rebar, and the guiding base displaces the processing mechanism assembly to the end of the rebar to perform turning and thread rolling sequentially, thereby processing the end of the rebar into a coupling end. The pre-compressed annular groove facilitates on-site inspection of thread quality and prevents the thread-rolling dies in the processing mechanism assembly from contact with, and hence damage by, the ribs on the rebar.

The invention relates to a machine assembly 100 for use in a manufacturing machine 1000, in particular in a horizontal orientation of an axis of rotation D in a horizontal manufacturing machine, comprising a workpiece fixture 30 which is mounted on a fixture carrier 4 and has a first side 31 and a second side 32, and a first and a second tool holding fixture 10, 20, wherein the first tool holding fixture 10 is arranged on the first side 31 of the workpiece fixture 30 and the second tool holding fixture 20 is arranged on the second side 32 of the workpiece fixture 30. According to the invention it is provided that the workpiece fixture 30 has a main spindle 33 with an axis of rotation D running from the first to the second side 31, 32, and the main spindle 33 is designed for holding a workpiece along the axis of rotation D.

The invention relates to a machine assembly 100 for use in a manufacturing machine 1000, in particular in a horizontal orientation of an axis of rotation D in a horizontal manufacturing machine, comprising a workpiece fixture 30 which is mounted on a fixture carrier 4 and has a first side 31 and a second side 32, and a first and a second tool holding fixture 10, 20, wherein the first tool holding fixture 10 is arranged on the first side 31 of the workpiece fixture 30 and the second tool holding fixture 20 is arranged on the second side 32 of the workpiece fixture 30. According to the invention it is provided that the workpiece fixture 30 has a main spindle 33 with an axis of rotation D running from the first to the second side 31, 32, and the main spindle 33 is designed for holding a workpiece along the axis of rotation D.

A machine tool includes a main spindle that rotates while holding a workpiece, a mover that moves a cutting tool including a linear cutting blade that cuts the workpiece, with respect to the workpiece in a moving direction including at least a Z-direction parallel or substantially parallel with the axis of the main spindle and a Y-direction perpendicular or substantially perpendicular to both the Z-direction and an X-direction determining the amount of cutting of the workpiece, a holder that holds the cutting tool in a state in which the direction of the linear cutting blade is inclined with respect to the Z-direction by a predetermined angle when seen from the X-direction, and an angle adjuster that changes the edge angle.

A machine tool cuts a workpiece having an inclined or curved surface and includes a main spindle that holds and rotates the workpiece, a moving device that moves a cutting tool relative to the workpiece in a direction obtained by combining a Z direction parallel or substantially parallel with the axis of the main spindle, an X direction that is perpendicular or substantially perpendicular to the Z direction and determines the amount of cutting of the workpiece, and a Y direction perpendicular or substantially perpendicular to the Z direction and the X direction, and an angle setting mechanism that causes the direction of an edge of the cutting tool to match the inclined surface of the workpiece by inclining the direction of the edge with respect to the Z direction when seen from the Y direction in a state in which the direction of the edge is inclined with respect to the Z direction when seen from the X direction.

A machine tool can perform a turning process using a fixed tool and a milling process using a rotating tool. The machine tool includes: a tool spindle having an air supply portion, for rotating the rotating tool; a lower tool rest for mounting a plurality of fixed tools thereon; a tool holder having a tapered surface restraining a tool, and attached to the lower tool rest, for detachably holding the tool; an automatic tool changer; and a special tool mounted on the tool spindle, into which the air is introduced from the air supply portion. When the tool is automatically changed by the automatic tool changer, the special tool mounted on the tool spindle is coupled to the tool holder, and the air from the air supply portion is supplied to the tapered surface through the special tool.