Grinding Worm Dressing via Superimposed Tool Movements
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Solution Overview
Problem
Current dressing methods for grinding worms are either too inflexible or too time-consuming, limiting the ability to efficiently and flexibly produce complex flank shapes required for topological grinding, which hinders the adoption of this technology in mass production despite its technical need and potential for optimizing power throughput and reducing noise in transmissions.
Innovation Solution
A method that uses a gear-like dressing tool with additional relative movements superimposed on a basic rolling movement between the grinding worm and the dressing tool, allowing for precise modification of the grinding worm flank through controlled rotary and axial movements, enabling efficient and flexible dressing of complex profiles using a standard tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If disc-shaped dressing tools with line contact are used, then dressing speed is improved, but flexibility for complex profiles deteriorates
Solution Approach 1:
The invention applies dynamics by superimposing additional relative movements (axial, radial, or rotational) on the basic rolling movement between the dressing tool and grinding worm. This dynamic approach allows a single dressing tool to generate multiple different flank profiles by varying the movement parameters, thereby achieving both high dressing speed and profile flexibility without requiring multiple specialized tools.
2Manufacturing precision
If multiple passes are used to dress the entire profile height, then complete coverage is achieved, but dressing time increases significantly
Solution Approach 1:
The invention implements continuity of useful action by enabling the dressing tool to cover the entire profile height in a single continuous pass through superimposed movements. The additional axial or radial movements allow the tool to progressively engage different heights of the grinding worm flank simultaneously, eliminating the need for multiple sequential passes and significantly reducing total dressing time while maintaining complete profile coverage.
3Adaptability or versatility
If a dressing master is used for universal application, then adaptability is improved, but device complexity and cost increase
Solution Approach 1:
The invention achieves universality by designing a dressing tool with a simple cylindrical or conical body that can dress various grinding worm profiles through controlled superimposed movements. Instead of creating complex dressing masters matched to each specific profile, the system uses movement control to provide multi-functionality, allowing the same simple tool to adapt to different profile requirements without increasing device complexity.
4Manufacturing precision
If the grinding worm rotational speed is limited during dressing, then dressing accuracy is maintained, but productivity deteriorates
Solution Approach 1:
The invention applies parameter changes by dynamically adjusting the superimposed movement parameters (amplitude, frequency, phase) in coordination with the grinding worm rotational speed. This allows the system to optimize both accuracy and productivity by varying movement parameters according to the specific dressing stage and profile requirements, rather than being constrained by fixed speed limitations.
Data Source
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AI summary
Disclosed is a method for dressing a single- or multi-thread grinding worm (34) in which a main rolling movement between the grinding worm and a gear-like dressing tool (90) is brought about. In order to create flank modifications on the grinding worm, an additional relative movement is superimposed on the main rolling movement. In addition, an auxiliary drive specifically designed for such a method, a correspondingly designed machine tool and a dressing tool for carrying out the method are disclosed.