Toothed tool having cutting edges on the tooth surfaces

US3943822A · kind A · utility

Assignee

• Carl Hurth Maschinen- und Zahnradfabrik GmbH & Co. · DE

Inventor

• Herbert Loos · Dorfen, DE

Key dates

• Filing date: Jan 27, 1975
• Grant date: Mar 16, 1976
• Expiry date: Jan 27, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T409/10477
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Gear cutting tool. There is provided a toothed tool for the plunge cut shaving of a gear workpiece having in the tooth surfaces a plurality of grooves whose edges constitute cutting edges, which grooves are spaced apart to define increments on each tool tooth equal to the number of teeth of the workpiece or one whole multiple thereof, and wherein when the tool is in a crossed axes relationship with the workpiece axis said cutting edges of those tool teeth spaced circumferentially a number of teeth equal to the number of teeth on the workpiece, or an integral multiple thereof, define a helix whose portion diametrically opposite the common perpendicular between said axes when viewed along said axis toward said workpiece forms an angle with the workpiece axis which is smaller than the complement of the angle between the tool axis and the workpiece axis. Thus, when said tool axis is rotated with respect to said workpiece axis in a clockwise direction, said cutting edges form a lefthand helix and when said tool axis is rotated with respect to said workpiece axis in a counterclockwise direction, said cutting edges define a righthand helix.