Variable-Curvature Chamfer Cutter for Tip Machining and Smooth Running
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Solution Overview
Problem
Existing chamfer cutters face challenges in machining cutting edges all the way to the tip due to limited space, leading to damage or destruction of the cutting edge, and require a compromise between curvature for smooth running and cutting capability.
Innovation Solution
A chamfer cutter design with a cutting head featuring a rotating body as a right circular cone, allowing for variable curvature along the cutting edge, especially near the tip, enabling machining to the tip without damaging the edge, and optimizing curvature for both smooth running and cutting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cutting edge has a constant strong curvature to improve smooth running, then the tool runs smoothly, but the cutting edge cannot be machined right up to the tip and cutting capability is compromised
Solution Approach 1:
The cutting edge is designed with different curvature characteristics in different sections: the first section (near the tip) has low curvature to enable machining to the tip, while the second section (outer peripheral) has higher curvature for smooth running. This local differentiation resolves the contradiction between smooth running and cutting capability at the tip.
Solution Approach 2:
The cutting edge is divided into multiple sections with different curvature properties. The first cutting edge section extends from the tip to an intermediate point with low curvature, while the second section from the intermediate point to the outer edge has higher curvature. This segmentation allows each section to optimize for its specific function.
2Ease of operation
If the cutting edge curvature is increased to improve smooth running, then the tool runs smoother, but the grinding tool space becomes insufficient and the cutting edge is damaged or destroyed
Solution Approach 1:
The cutting edge has different curvature characteristics in different sections: the first section near the tip has low curvature (enabling machining to tip without damage), while the second section has higher curvature for smooth running. This local differentiation resolves the contradiction between smooth running and cutting edge integrity.
3Manufacturing precision
If the cutting edge is machined right up to the tip with constant curvature, then cutting capability is improved, but the curvature cannot be strong enough for smooth running
Solution Approach 1:
The cutting edge is designed with different curvature characteristics in different sections: the first section (near the tip) has low curvature to enable machining to the tip, while the second section (outer peripheral) has higher curvature for smooth running. This local differentiation resolves the contradiction between cutting capability and smooth running.
Solution Approach 2:
The cutting edge is divided into multiple sections with different curvature properties. The first cutting edge section extends from the tip to an intermediate point with low curvature, while the second section from the intermediate point to the outer edge has higher curvature. This segmentation allows each section to optimize for its specific function.
4Manufacturing precision
If a tip is added to the cutting head, then cutting precision is improved, but the space for grinding the cutting edge becomes even more limited
Solution Approach 1:
The cutting edge has different curvature characteristics in different sections: the first section near the tip has low curvature to enable machining to the tip, while the second section has higher curvature for smooth running. This local differentiation resolves the contradiction between cutting precision and grinding space availability.
Data Source
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AI summary
Device for chamfering, deburring and countersinking with a shaft (200) and with a cutting head (100) whose body of revolution represents a cone, with a number of cutting edges (11) of the cutting head (100), and with a curved profile of the cutting edge (11) viewed in the axial direction, which has at least one change in curvature.