Tool for chipless production or finishing of a thread, method for producing the tool and method for producing a thread

US11571760B2 · kind B2 · utility

Assignee

• EMUGE-WERK RICHARD GLIMPEL GMBH & CO. KG FABRIK FUR PRAZISIONSWERKZEUGE · DE

Inventors

• Dietmar Hechtle · Pegnitz, DE
• Marko Übler · Lautenbächle, DE
• Jurgen Fenzel · Simmelsdorf, DE

Key dates

• Filing date: Nov 4, 2020
• Grant date: Feb 7, 2023
• Expiry date: Jan 8, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23G5/06
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A tool for the chipless production of a thread in a workpiece comprises at least one shaping region which can be rotated about a tool axis (A) for the chipless production or finishing of the thread. The shaping region comprises a plurality of pressing lobes projecting radially outwardly from the tool axis (A) for producing the thread by pressing the pressing lobes into the workpiece surface. The pressing lobes are successively arranged along a forming curve which substantially spirals around the tool axis (A), and the pitch of the forming curve essentially corresponds to the pitch of the thread to be produced or reworked. The forming curve has a helix angle (a), and a profile of at least one pressing lobe is designed in such a way that a thread produced in an axial section containing the tool axis is at least in sections round-arched or ogival.