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AssigneeMannesmann Aktiengesellschaft
InventorsWilfried Forster, Roland Stephan, Dr.-Ing. Joachim Schlegel
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A device for continuous chipless separation of single identical rings from a tubular workpiece, includes at least two cutting rollers which are placed about the tubular workpiece, and which operate in a same direction and are interconnected by a positive engagement. Each cutting roller includes a basic body having opposite axial ends defining an entry zone and an exit zone, respectively. The basic body has a slip bevel at the entry zone, a calibrating section at the exit zone, and a cutting screw disposed between the slip bevel and the calibrating section and including a helical main thread portion with a conical entry part and a substantially cylindrical primary part in succession of the entry part, whereby the cutting screw has at least one additional thread which is disposed between threads of the main thread portion of the cutting screw.
A device for continuous chipless separation of identical rings from a tubular workpiece, comprising at least two cutting rollers placed about the tubular workpiece, said at least two cutting rollers operating in a same direction, each of said cutting rollers including a basic body having opposite axial ends defining an entry zone and an exit zone, respectively, said basic body having a slip bevel at the entry zone, a calibrating section at the exit zone, and a cutting screw disposed between the slip bevel and the calibrating section and including a helical main thread portion with a conical entry part and a substantially cylindrical primary part in succession of the entry part, said cutting screw having at least one additional first thread disposed between threads of the main thread portion of the cutting screw in immediate proximity of the slip bevel for assisting the cutting screw in grabbing the tubular workpiece in the entry zone to thereby reduce wear of the cutting screw.
A cutting roller for use in a device for continuous chipless separation of identical rings from a tubular workpiece, said cutting roller comprising a basic body having opposite axial ends defining an entry zone and an exit zone, respectively, said basic body having a slip bevel at the entry zone, a calibrating section at the exit zone, and a cutting screw disposed between the slip bevel and the calibrating section and including a helical main thread portion with a conical entry part and a substantially cylindrical primary part in succession of the entry part, said cutting screw having at least one additional first thread disposed between threads of the main thread portion of the cutting screw in immediate proximity of the slip bevel for assisting the cutting screw in grabbing the tubular workpiece in the entry zone to thereby reduce wear of the cutting screw.
Dependencies are inferred from the claim text.