Serration Tooth Root Contour for Higher Load Capacity
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Solution Overview
Problem
Existing serration technologies face challenges in achieving high mechanical load-bearing capacity and reliability while being simple and economical to produce.
Innovation Solution
A method for producing serrations that involves selecting a starting contour and an adjacent partial contour, modifying the root-side starting contour using a correction function with adjustable parameters, and machining the serration based on the modified contours to enhance tooth root load capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional serration designs are used, then manufacturing is simple and economical, but tooth root load capacity is insufficient
Solution Approach 1:
The tooth profile is divided into distinct functional segments: an involute-shaped segment for the tooth edge and an ellipse-shaped segment for the tooth root region. This segmentation allows each part to be optimized independently for its specific function, improving overall tooth root load capacity while maintaining manufacturability through standardized geometric forms.
Solution Approach 2:
Different geometric forms are applied to different regions of the tooth: the involute shape provides optimal contact characteristics for the tooth edge during operation, while the ellipse shape with its specific semi-axis configuration optimizes the tooth root region for load-bearing capacity. This local optimization of geometry matches the functional requirements of each region.
2Strength
If complex optimization methods are applied to improve tooth root load capacity, then strength increases, but manufacturing complexity and cost increase
Solution Approach 1:
The optimal serration geometry is predetermined through theoretical analysis and optimization, with the ellipse-shaped tooth root region configured with specific semi-axis ratios. This pre-optimized design can be directly implemented in manufacturing without requiring complex real-time optimization processes, thereby improving tooth root load capacity while maintaining manufacturing simplicity.
Solution Approach 2:
The invention specifies particular geometric parameters for the tooth root region, including the ellipse shape with a long semi-axis inclined at a specific angle (30°-60°) with respect to the radial direction. By optimizing these parameters in advance and specifying them in the design, the tooth root load capacity is enhanced while the manufacturing process remains straightforward using conventional machining methods.
Data Source
AI summary
A method for producing a tooth geometry includes selecting a root-side starting contour configured as an ellipse segment and a head-side partial contour of a tooth; selecting an adaptation region for at least a part of the root-side starting contour; determining for the adaptation region a correction specification determined using a correction function configured as an at least third-order polynomial having at least one adjustable function parameter comprising adjustable coefficients; modifying the root-side starting contour using the correction specification to form a root-side final contour, and producing the tooth geometry by chip-removing machining based on the head-side partial contour and the root-side final contour. Also disclosed are a computer program product for carrying out the method, a tool for manufacturing the tooth geometry based on the method, and a machine component having the tooth geometry.