Hob Peeling Device Radial Motion for Blind End Gears
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Solution Overview
Problem
Existing gear cutting devices using hob peeling struggle to produce gearings with end-side undercuts and blind ends without material weakening, as they require additional machining steps and can't efficiently terminate tooth grooves radially and axially.
Innovation Solution
The method involves superimposing a radial emerging or submerging motion on the axial feed during tooth cutting, allowing the production of gearings with blind ends and eliminating the need for end-side undercuts, using a peeling wheel with a conical lateral surface and a single swivel axis to set the axis intersection angle, enabling stepwise deepening of tooth grooves and producing crowned gearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional hob peeling is used to cut gear teeth, then the gear blank can be processed, but end-side undercuts are required and material weakening occurs
Solution Approach 1:
The invention introduces a radial motion component in addition to the traditional axial feed motion. This dimensional change allows the tool to terminate tooth grooves radially at the blank surface, eliminating the need for end-side undercuts and avoiding material weakening while achieving precise groove termination.
2Manufacturing precision
If additional machining steps are used to produce gearings with blind ends, then complete tooth groove closure is achieved, but manufacturing complexity increases
Solution Approach 1:
The invention merges the radial emerging motion with the axial feed motion into a single integrated cutting process. This combination allows tooth grooves to be closed at both ends (producing blind ends) in one continuous operation, eliminating the need for separate machining steps and reducing manufacturing complexity.
3Adaptability or versatility
If radial emerging motion is superimposed on axial feed, then blind ends and crowned gearings can be produced, but motion control complexity increases
Solution Approach 1:
The invention implements dynamic motion control where the radial position of the tool is continuously adjusted during the cutting process. The radial emerging or submerging motion is superimposed on the axial feed in a controlled manner, enabling flexible production of various gearing types (blind ends, crowned gearings) through programmable motion sequences.
4Ease of manufacture
If conventional hob peeling is used, then simple axial feed is maintained, but tooth grooves cannot be terminated radially and axially at the surface
Solution Approach 1:
The invention adds radial motion control to the conventional axial feed mechanism. This dimensional enhancement enables precise termination of tooth grooves at the blank surface in both radial and axial directions, achieving accurate groove closure while maintaining manufacturability through integrated motion control.
Data Source
AI summary
A device for cutting teeth in gear blanks by hob peeling, the device having a workpiece spindle for holding the gear blank, the workpiece spindle being rotationally drivable about a workpiece rotational axis, the device having a tool spindle which carries a peeling wheel having cutting edges and which is rotationally drivable about a tool rotational axis, wherein the tool spindle and the workpiece spindle may be positioned relative to one another at a fixed or variable axis intersection angle, and for the purpose of forward feed and infeed, the tool spindle is movable relative to the workpiece spindle in the radial direction and in the axial direction with reference to the workpiece rotational axis by means of positioning drives, and the device having an electronic control device for controlling the positioning drives and rotationally driving the tool spindle and the workpiece spindle at a specified rotational speed ratio, optionally with a changing phase position. In order to expand the production spectrum, it is proposed that the control device is set up or may be set up in such a way that during cutting of teeth in a coarsely precut or uncut blank, a radial emerging motion out of the gear blank is superimposed on the axial feed at the end of the feed, and/or a radial submerging motion into the gear blank is superimposed on the axial feed at the start of the feed.