Asymmetrical Drill Bit Cutting Head for Wear and Speed
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Solution Overview
Problem
Conventional drill bits used for hard materials like concrete and metal have limited lifespan and drilling efficiency due to symmetrical cutting edges, which lead to premature wear and slower drilling speeds.
Innovation Solution
A drill bit design featuring a cutting head with asymmetrical cutting edges, where the second cutting edge extends at a different angle than the first, improving engagement with the workpiece and reducing wear, and a method of manufacturing that forms the body, shank, and cutting head with these angled edges to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If symmetrical cutting edges are used in conventional drill bits, then the manufacturing process is simple and consistent, but the drill bit lifespan is limited and drilling efficiency is reduced
Solution Approach 1:
The patent applies asymmetry by configuring cutting edges at different angles relative to the drill bit axis. Specifically, at least one cutting edge is positioned at a first angle while another cutting edge is positioned at a second angle that differs from the first angle. This asymmetric configuration optimizes engagement with the workpiece, distributing wear more evenly across the cutting edges and significantly extending drill bit lifespan while maintaining manufacturing feasibility through standardized forming processes.
2Productivity
If symmetrical cutting edges are used in conventional drill bits, then the design is straightforward, but the drilling speed is slower
Solution Approach 1:
The asymmetric cutting edge configuration optimizes drilling speed by creating more effective engagement with the workpiece material. The varied angles allow different cutting edges to engage at optimal orientations during rotation, reducing resistance and enabling faster material removal. This design maintains compatibility with standard drill bit manufacturing processes while achieving approximately 15% reduction in drilling time compared to symmetrical designs.
3Reliability
If asymmetrical cutting edges are implemented, then engagement with workpiece is improved and wear is reduced, but the cutting head design becomes more complex
Solution Approach 1:
The patent applies local quality by varying the angular position of specific cutting edges while maintaining the overall structural integrity and symmetry of the drill bit body. Each cutting edge is positioned at an optimized angle for its specific functional role, with at least one cutting edge at a first angle and another at a second angle. This localized variation in cutting edge geometry improves wear distribution and engagement without requiring complex changes to the entire cutting head structure, maintaining manufacturability while enhancing performance.
Data Source
AI summary
A drill bit including a body, a shank, and a cutting head. The body has a first end and a second end. The shank is located at the first end. The cutting head is located at the second end. The cutting head includes a tip, a first cutting edge, and a second cutting edge. The first cutting edge extends from the tip at a first angle. The second cutting edge extends from the tip at a second angle. The second angle is different from the first angle.