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US 12,311,453 B2Granted
Internal helical broaching tool
AssigneeForst Technologie GmbH & Co. KG
InventorAndreas Berktold
Life of this patent
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Abstract
An internal helical broaching tool has a pre-broaching tool portion ex-tending in one broaching direction and a subsequent precise sizing tool portion. The latter, as a whole, is made of a hard metal with a density of greater than 10 g/cm3. This results in an internal helical broaching tool with increased service life at a defined machining performance.
Claims10
An internal helical broaching tool (1) for broaching internal round profiles of gears with helical toothing, comprising:
- a pre-broaching tool portion (4) extending in a broaching direction (2), and
- a precise sizing tool portion (5),
- wherein broaching teeth of the pre-broaching tool portion (4) are arranged one behind the other in the broaching direction (2) such that the broaching teeth are arranged obliquely one behind the other along helical broaching paths (12),
- wherein broaching teeth (13) of the precise sizing tool portion (5) are arranged one behind the other,
- wherein the precise sizing tool portion (5) consists of a hard metal having density that is greater than 10 g/cm3, and
- wherein the broaching teeth of the pre-broaching tool portion (4) and the broaching teeth (13) of the precise sizing tool portion (5) are circumferentially spaced apart,
- wherein the pre-broaching tool portion (4) is made of high-speed steel,
- wherein the internal helical broaching tool is designed so that a torsional load occurs during helical broaching, and
- wherein an oblique course of the helical broaching paths corresponds to an oblique course of the helical toothing.
6 more elements
Dependencies are inferred from the claim text.