Integral Tapered Countersink Drill Bit for Continuous Chip Removal
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Solution Overview
Problem
Existing tapered countersink drill bits require multiple steps and a fixing stud, leading to reduced tool longevity, inefficiency, and incomplete dreg removal, affecting drilling speed and production rate.
Innovation Solution
A tapered countersink drill bit with an integral structure, featuring screwing knives and trenches with identical angles and designs, forming a continuous drilling head from front to rear, ensuring efficient dreg removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two drills of different outer diameters are serially connected by a fixing stud to form a combined drill, then the process for forming trenches in the screw head is simplified, but the lifetime of the structure is shorter and the structure is weaker
Solution Approach 1:
The patent merges the front drilling head, tapered portion, and rear drilling head into a single integral structure formed from one solid piece of material. This eliminates the fixing stud connection between separate drills, thereby simplifying the structure while simultaneously improving strength and lifetime by removing the weak connection point.
2Ease of manufacture
If two drills of different outer diameters are serially connected by a fixing stud, then the process for forming trenches is simplified, but the dregs are not removed smoothly and resistance increases
Solution Approach 1:
The patent combines the front drilling head and rear drilling head into a single continuous structure with integrated dreg removing trenches. This ensures uninterrupted dreg removal pathways from the front to the rear of the drilling head, eliminating resistance buildup and maintaining smooth drilling operation.
Solution Approach 2:
The patent creates continuous dreg removing trenches that extend uninterrupted from the front drilling head through the tapered portion to the rear drilling head. This continuity ensures that dregs are constantly and smoothly removed throughout the entire drilling process, preventing resistance accumulation and maintaining optimal drilling speed.
3Adaptability or versatility
If two separate drills are used to form screw head, then the outer diameter can be adjusted, but two steps are needed and quality is greatly affected by the worker
Solution Approach 1:
The patent integrates multiple drilling functions into a single drilling head structure that can perform both front drilling and rear drilling operations simultaneously. The integral design with varying outer diameters at different sections allows the tool to handle different workpiece requirements while maintaining consistent quality and high production rate through one-step operation.
Data Source
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AI summary
A tapered countersink drill bit includes at least two screwing knifes and at least one two screwing trenches and a rod body; a length of an edge of the left lateral side of each screwing knife being shorten than that of an edge of the right lateral side thereof; each screwing knife including a front drilling head; a tapered portion formed at a backside of the front drilling head; a rear drilling head formed at a backside of the tapered portion; the screwing angle of each screwing knife being identical from the front drilling head to the rear drilling head; and a screwing angle of each screwing trench being identical from the front drilling head to the rear drilling head; a width between two adjacent knifes at a front end of the rear drilling head being longer than a width between two knifes at rear ends of two rear drilling head.