Gear Machining Tool Segmentation for Vibration Control
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Solution Overview
Problem
Conventional gear machining methods experience high cutting resistance and self-excited vibration during high-speed cutting processes, leading to reduced tooth trace accuracy due to simultaneous contact of multiple cutting teeth with the workpiece, which complicates feed control and accuracy.
Innovation Solution
A gear machining device with a machining tool having multiple sets of cutting teeth that cut different parts of the gear, including roughing and finishing teeth, is used to reduce cutting resistance and suppress self-excited vibration by varying the contact position and depth of cut, improving tooth trace accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple cutting teeth contact the workpiece simultaneously during high-speed cutting, then the cutting process is efficient, but cutting resistance increases and self-excited vibration occurs reducing tooth trace accuracy
Solution Approach 1:
The invention divides the gear tooth surface into multiple zones (side faces and bottom land) and assigns different cutting teeth to machine different zones. This segmentation reduces the number of cutting teeth contacting the workpiece simultaneously, lowering cutting resistance and suppressing self-excited vibration while maintaining high-speed cutting efficiency
Solution Approach 2:
Different cutting teeth are designed with different geometries optimized for specific cutting zones. Roughing cutting teeth are configured for removing large amounts of material from side faces, while finishing cutting teeth are designed for precise machining of bottom land and final surface finishing. This local optimization improves tooth trace accuracy by matching tool geometry to specific machining requirements
2Force
If the diameter of the machining tool is reduced to decrease the number of cutting teeth contacting the workpiece, then cutting resistance is reduced, but the rigidity of the machining tool decreases
Solution Approach 1:
Instead of reducing tool diameter to decrease contact teeth, the invention segments the cutting function across different teeth types. This allows maintaining a larger tool diameter for rigidity while still reducing simultaneous contact through functional segmentation of roughing and finishing teeth
Solution Approach 2:
The invention uses only the necessary number of cutting teeth for each specific cutting zone rather than engaging all teeth. Roughing teeth perform aggressive material removal, then finishing teeth perform precise finishing, avoiding excessive tooth engagement that would increase cutting resistance
Data Source
AI summary
A gear machining device is provided which can machine an accurate gear by a cutting process by synchronously rotating a machining tool and a workpiece at a high speed. A machining tool includes roughing cutting teeth for roughing bottom lands and right and left side faces of teeth of a gear, right side face finishing cutting teeth for finishing the right side faces of the teeth, and left side face finishing cutting teeth for finishing the left side faces of the teeth. The cutting teeth thus cut different parts of the teeth of the gear. This can reduce cutting resistance and suppress self-vibration during the cutting process, thereby improving tooth trace accuracy of the gear.