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AssigneeRobert Bosch GmbH
InventorsJie Bao, Bernhard De Graaff, Daniel Cettier, Guang Qiao, Holger Thoene, Otmar Hertwig, Volker Hertweck
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The invention relates to a method for producing a gear worm (12) which is located in particular on an armature shaft (14) of an electromotive drive unit (10), wherein firstly a worm gear (20) having screw flanks (22) axially opposite one another on a longitudinal axis (18) is formed by means of a rolling tool, and subsequently a groove structure (24) which is concentric about the longitudinal axis (18) is formed on the screw flanks (22) by means of an additional process step. The invention also relates to a gear worm (12) produced according to the method according to the invention, and to a transmission drive unit (10) containing such a gear worm (12).
A method for producing a gear worm (12), the method comprising forming, with a roller burnishing tool, a worm toothing system (20) with worm flanks (22) which lie axially opposite one another on a longitudinal axis (18), and thereafter configuring on the worm flanks (22) a groove structure (24) which is concentric about the longitudinal axis (18), wherein the concentric groove structure (24) is produced by belt grinding.
Dependencies are inferred from the claim text.