Gear Honing Tool Tooth Profile for Higher Material Removal
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Solution Overview
Problem
Existing precision machining methods for gearing struggle to achieve enhanced material removal performance while maintaining long-term durability of the gear-cutting tool.
Innovation Solution
A method where the gear-cutting tool with teeth of varying thickness is used, positioned such that the thickness maximum is outside the workpiece's tooth gaps initially, allowing the teeth to penetrate and remove material uniformly as they increase in thickness, minimizing contact area and load variability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gear-cutting tool uses teeth with constant thickness, then the tool structure is simple and easy to manufacture, but the material removal performance is limited and load varies significantly during machining
Solution Approach 1:
The patent applies local quality by varying the thickness of tool teeth along their length. The teeth have different thicknesses at different positions (thinner at the entry end, thicker at the exit end), allowing each section of the tooth to be optimized for its specific function during the machining process. This resolves the contradiction by enabling improved material removal performance through localized thickness variation while maintaining a relatively simple overall tool structure.
2Productivity
If the gear-cutting tool engages deeply with the workpiece teeth, then more material can be removed per pass, but the process forces increase and tool durability decreases
Solution Approach 1:
The patent applies parameter changes by systematically varying the thickness parameter of the tool teeth along their length. By changing the thickness parameter from the entry end to the exit end, the tool achieves better load distribution during engagement. This allows deeper engagement with the workpiece teeth for increased material removal while maintaining tool durability through optimized load distribution across the varying tooth thickness.
3Loss of time
If the gear-cutting tool is moved quickly through the tooth gaps, then machining time is reduced, but the precision of the final geometry is compromised
Solution Approach 1:
The patent applies preliminary action by designing the tool teeth with varying thicknesses that are optimized for their specific positions in the engagement sequence. The thickness variation is predetermined and built into the tool geometry, allowing the tool to perform its material removal function effectively at each position without requiring slow, careful movement. This enables faster machining cycle times while maintaining precision through the pre-optimized tooth geometry.
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 enhances material removal performance and extends the tool's durability, reducing process forces and allowing for precise machining with fewer passes, while maintaining the geometry of the workpiece's teeth.
Implementation Method 1
teeth of a gear-shaped gear-cutting tool, which rotates about a rotation axis, are brought into rolling engagement with teeth of the gearing of the workpiece rotating about a rotation axis
Implementation Method 2
The rolling rotation and the axis intersection angle give rise to a sliding relative movement between the tooth flanks of the honing tool and the tooth flanks of the gear to be machined in the rolling contact, which movement effects the material removal on the gear
Data Source
AI summary
A method for precision machining a workpiece with gearing, wherein teeth of a gear-cutting tool rotating about a rotation axis are brought into engagement with teeth of the workpiece rotating about a workpiece rotation axis, and the gear-cutting tool and the workpiece are moved relative to each other in an axial direction parallel to the workpiece rotation axis. The thickness of the teeth of the gear-cutting tool, starting from an end face, increases in the axial direction until a thickness maximum is reached. The ratio (Bw/Bz) of the width (Bw) of the teeth of the workpiece to the width (Bz) of the teeth of the gear-cutting tool is 2-20. Before and after each pass of the teeth of the gear-cutting tool through the tooth gaps of the workpiece, the thickness maximum of each tooth of the gear-cutting tool is positioned outside the gearing of the workpiece.