Multi-Start Grinding Worm Dressing to Break Periodic Flank Patterns
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Solution Overview
Problem
Existing methods for dressing multi-start grinding worms result in periodic topography on gear flanks, leading to unsteady running and noise during operation due to uniform dressing parameters across all gears.
Innovation Solution
Dressing parameters are varied between gears, with differences in speed ratios and radial distances of dressing strokes, allowing each gear to have unique abrasive surface profiles, thereby eliminating periodic patterns and enhancing smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uniform dressing parameters are used for all gears of the grinding worm, then the dressing process is simple and efficient, but periodic topography is created on gear flanks causing unsteady running and noise
Solution Approach 1:
The patent applies local quality by assigning different dressing parameters to different gears of the grinding worm. Specifically, at least one gear is dressed with different parameters (such as different radial offsets, speed ratios, or path speeds) compared to other gears, creating locally varied topography that eliminates harmful periodic patterns while maintaining overall process efficiency.
Solution Approach 2:
The patent implements parameter changes by varying dressing parameters between different gears. This includes changing radial offset distances, speed ratios between dressing roller and grinding worm, or path speeds for different gears, thereby transforming the uniform dressing approach into a variable parameter approach that prevents periodic topography formation.
2Object-generated harmful factors
If different dressing parameters are used for different gears, then periodic topography is eliminated and smooth operation is achieved, but the dressing process complexity increases
Solution Approach 1:
The patent applies local quality by assigning different dressing parameters to different gears of the grinding worm. Specifically, at least one gear is dressed with different parameters (such as different radial offsets, speed ratios, or path speeds) compared to other gears, creating locally varied topography that eliminates harmful periodic patterns while maintaining overall process efficiency.
Solution Approach 2:
The patent implements dynamics by making the dressing parameters variable rather than static. The system dynamically adjusts parameters such as radial offset, speed ratio, or path speed depending on which gear is being dressed, allowing the dressing process to adapt to different gears and eliminate periodic patterns without requiring complete process redesign.
3Ease of operation
If the same speed ratio between dressing roller and grinding worm is used for all gears, then the dressing process is consistent and simple to control, but periodic patterns are created on the abrasive surfaces
Solution Approach 1:
The patent implements parameter changes by varying the speed ratio between the dressing roller and grinding worm for different gears. At least one gear is dressed with a different speed ratio compared to other gears, which prevents the formation of periodic patterns on the abrasive surfaces while maintaining manageable process control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves smoother running of gears by reducing periodicity in the topography of the abrasive surfaces and tooth flanks, improving operational performance without compromising economic efficiency.
Implementation Method 1
the abrasive surfaces of the individual flights of the grinding worm are profiled one after the other with the dressing tool
Data Source
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AI summary
The invention relates to a method for dressing a multi-start grinding screw (1) using a dressing tool (2), in which the abrasive surfaces (3) of the individual turns (4, 5, 6) of the grinding screw (1) are profiled successively with the dressing tool (2), wherein the dressing is carried out in at least two turns (4, 5, 6) with different dressing parameters, so that the profiling of the abrasive surfaces (3) of the turns (4, 5, 6) differs from each other.In order to achieve an improved grinding result for the workpiece without compromising efficiency, the invention provides that the dressing parameters are selected such that the abrasive surfaces (3) of at least two passes (4, 5, 6) differ from each other when viewed in the direction of the helix of the pass (4, 5, 6), and/or that the abrasive surfaces (3) of the individual passes (4, 5, 6) are profiled by topological dressing, whereby several linear dressing strokes are carried out over the height of the abrasive surface (3), in which the dressing tool (2) is guided in the radial direction (r) of the grinding screw (1) at predetermined intervals (x), wherein the intervals (x) are constant in each pass (4, 5, 6), but differ in at least two passes (4, 5, 6).