A whirling tool (21), in particular for cutting a thread, comprises a body with cutting teeth integrally machined thereon (23; 47, 51). Inaccuracies caused by mounting cutting teeth on the tool are avoided thereby.

A whirling tool for machining a workpiece, having: three or a multiple of three cutting plates, wherein each of the cutting plates comprises at least one cutting edge; a cutting plate holder having a plurality of cutting plate receptacles, wherein each of the cutting plate receptacles is configured to receive one of the cutting plates, wherein the cutting plate receptacles are disposed so as to be distributed in a circumferential direction across the cutting plate holder; and a plurality of fastening elements for releasably fastening the cutting plates in the cutting plate receptacles of the cutting plate holder; wherein the cutting plates comprise at least two different kinds of cutting plates, wherein at least one cutting plate of a first kind, and one cutting plate of a second kind are provided for each group of three cutting plates that are disposed beside one another on the cutting plate holder, wherein the cutting plate of the first kind differs from the cutting plate of the second kind by an overall geometry, by a dimension of the at least one cutting edge, and by a shape of the at least one cutting edge.

A whirling tool configured to machine a workpiece. The whirling tool includes a plurality of cutting inserts, a cutting insert carrier, and a coolant channel which is arranged in the cutting insert carrier. The cutting insert carrier includes a plurality of cutting insert receptacles for receiving and releasably fastening respectively one of the cutting inserts. The cutting insert receptacles are arranged distributed in the circumferential direction over the cutting insert carrier. The cutting insert carrier further includes a through-opening which extends along a central axis of the cutting insert carrier, and through which the workpiece can be passed during the machining. The cutting inserts protrude into the through-opening, and the coolant channel extends between an inlet opening and an outlet opening, wherein the outlet opening leads into the through-opening and/or is oriented towards the through-opening.

The whirling device comprises a retaining ring extending around a ring axis and a central opening and having at least one receiving area for a machining element for machining rod-shaped material in the area of the central opening. A coolant supply comprises a supply sleeve which is arranged on the retaining ring via a rotary bearing and comprises a coolant connection and a supply area adjoining a connection area of the retaining ring. Starting from at least one inlet opening in the connection area of the retaining ring, at least one passage leads through the retaining ring to at least one outlet opening which faces the central opening of the retaining ring and is designed for a machining element in a receiving area. No space is required for the coolant supply between the retaining ring and an assigned lathe.

A thread milling system includes a thread milling machine having a spindle; and a combination tool having a body and a reaming insert, the body having a first end and a second end, the body defining a securing pocket, the reaming insert secured proximate to the second end of the body and within the securing pocket, the second end of the body attached to the spindle.

A numerical control apparatus includes: a thread-whirling motor controller controlling, based on a thread lead representing a movement amount of a thread whirling tool per rotation of a workpiece, a reference differential speed representing a difference between a predetermined reference rotational speed of the thread whirling tool and a rotational speed of the workpiece, the number of tool blades of the thread whirling tool, and a workpiece spindle speed representing the rotational speed of the workpiece, a first motor moving the thread whirling tool, a second motor rotating the thread whirling tool, and a third motor rotating the workpiece. The thread-whirling motor controller controls: the first motor based on the thread lead and the reference differential speed; the second motor based on the thread lead, the reference differential speed, the number of tool blades, and the workpiece spindle speed; and the third motor based on the workpiece spindle speed.

A method of operating a thread milling machine includes securing a product in a securing mount proximate to the thread milling machine, the thread milling machine having a spindle; securing a combination tool to the spindle, the combination tool having a body and an insert, the body having a first end and a second end, the body defining a securing pocket, the insert secured proximate to the second end at a first side of the securing pocket, the second end attached to the spindle; and rotating the spindle.

A numerical control apparatus includes: a thread-whirling motor controller controlling, based on a thread lead representing a movement amount of a thread whirling tool per rotation of a workpiece, a reference differential speed representing a difference between a predetermined reference rotational speed of the thread whirling tool and a rotational speed of the workpiece, the number of tool blades of the thread whirling tool, and a workpiece spindle speed representing the rotational speed of the workpiece, a first motor moving the thread whirling tool, a second motor rotating the thread whirling tool, and a third motor rotating the workpiece. The thread-whirling motor controller controls: the first motor based on the thread lead and the reference differential speed; the second motor based on the thread lead, the reference differential speed, the number of tool blades, and the workpiece spindle speed; and the third motor based on the workpiece spindle speed.

Whirling tool for machining a workpiece. The whirling tool comprises a plurality of cutting inserts, a cutting insert carrier, and a coolant channel which is arranged in the cutting insert carrier. The cutting insert carrier comprises a plurality of cutting insert receptacles for receiving and releasably fastening respectively one of the cutting inserts. The cutting insert receptacles are arranged so as to be distributed in the circumferential direction over the cutting insert carrier. The cutting insert carrier further comprises a through-opening which extends along a central axis of the cutting insert carrier, and through which the workpiece can be passed during the machining. The cutting inserts protrude into the through-opening, and the coolant channel extends between an inlet opening and an outlet opening, wherein the outlet opening leads into the through-opening and/or is oriented towards the through-opening.

A whirling tool for machining a workpiece, having: three or a multiple of three cutting plates, wherein each of the cutting plates comprises at least one cutting edge; a cutting plate holder having a plurality of cutting plate receptacles, wherein each of the cutting plate receptacles is configured to receive one of the cutting plates, wherein the cutting plate receptacles are disposed so as to be distributed in a circumferential direction across the cutting plate holder; and a plurality of fastening elements for releasably fastening the cutting plates in the cutting plate receptacles of the cutting plate holder; wherein the cutting plates comprise at least two different kinds of cutting plates, wherein at least one cutting plate of a first kind, and one cutting plate of a second kind are provided for each group of three cutting plates that are disposed beside one another on the cutting plate holder, wherein the cutting plate of the first kind differs from the cutting plate of the second kind by an overall geometry, by a dimension of the at least one cutting edge, and by a shape of the at least one cutting edge.