Multi-Start Grinding Worm Dressing via Segmented Radial Infeeds
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Solution Overview
Problem
The existing methods for dressing multi-flight grinding worms are time-consuming and inefficient, as they require precise and repetitive radial infeeds to achieve uniform flank contours, leading to prolonged dressing times and high resource expenditure.
Innovation Solution
The method involves producing flank contours that differ geometrically and/or in surface structure across worm threads, using a dressing tool with a partial radial cutting area, and performing multiple radial sections offset from each other, allowing for targeted variations in geometry and surface structure through axial movement and varying center distances and swivel angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If topological dressing is used to build up the flank contour point by point or line by line, then the contour accuracy is improved, but the dressing time increases significantly
Solution Approach 1:
The flank contour is divided into multiple radial sections that are dressed in separate partial dressing operations. Each section is dressed with a specific radial increment, allowing the complete contour to be built up efficiently through segmented processing rather than continuous fine increments.
Solution Approach 2:
Different radial sections of the flank contour are dressed with different radial increments tailored to local requirements. This allows larger increments in less critical areas and smaller increments only where higher precision is needed, optimizing the overall dressing time while maintaining necessary accuracy.
2Manufacturing precision
If small radial increments are chosen to ensure exact contour, then the manufacturing precision is improved, but the number of dressing strokes increases leading to longer processing time
Solution Approach 1:
The dressing process is segmented into partial operations, each producing a specific radial section of the flank contour. This segmentation allows the use of larger radial increments in each partial operation while still achieving the complete precise contour through the combination of sections.
Solution Approach 2:
Each partial dressing operation produces a radial section that may extend beyond the final required contour in some areas, allowing the use of larger radial increments. The excess material is removed in subsequent operations, enabling faster processing while maintaining final precision.
3Manufacturing precision
If uniform flank contours are produced in all worm threads, then the consistency of grinding quality is improved, but the dressing process becomes time-consuming and resource-intensive
Solution Approach 1:
Different radial sections of the flank contour in different worm threads are dressed with different radial increments and offsets tailored to local requirements. This allows optimization of each section's dressing parameters, reducing overall dressing time while maintaining sufficient grinding quality through the combined effect of all sections.
Solution Approach 2:
The dressing parameters (radial increments, offsets) are dynamically adjusted for different radial sections and worm threads based on local requirements. This dynamic approach allows the process to adapt to local conditions, achieving necessary grinding quality with reduced total dressing time compared to uniform parameters applied throughout.
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
This approach reduces dressing time and enhances machining quality by increasing the degree of coverage and allowing for specific profile modifications, improving the surface structure and noise behavior of ground workpieces.
Implementation Method 1
a diamond dressing wheel can be used for this, which follows the flank contour under NC control and thus produces the required profile
Data Source
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AI summary
The invention relates to a method for dressing a multi-start grinding screw (1), in which the flank contour (3', 3", 4', 4", 5', 5") of the helically parallel screw flights (6, 7, 8) is produced by means of a dressing tool (2). In order to achieve an improved grinding result, particularly with a shorter dressing time, the invention provides that flank contours (3', 3", 4', 4", 5', 5") are produced in at least two screw flights (6, 7, 8) which differ from each other geometrically and/or in their surface structure. The invention further relates to a method for grinding a workpiece and a grinding screw.