Drill Bit Collar Structure for Vibration and Stress Damping
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Solution Overview
Problem
Existing drill bits experience significant vibrations and stress during operation, particularly when drilling hard materials, leading to reduced lifespan and potential fracture.
Innovation Solution
A drilling tool design featuring a shank portion, drill portion, and a collar that dampens vibrations by absorbing energy and reducing stress through a collar with a large cross-section and gradual transitions, enhancing the connection between the shank and drill portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drill bit is used to drill hard materials, then drilling capability is achieved, but vibrations and stress increase leading to reduced lifespan
Solution Approach 1:
A collar is introduced as an intermediary component between the shank and the drill portion. This collar serves as a mediator that absorbs and dampens vibrations and stress, protecting the drill bit from harmful forces while maintaining drilling capability.
Solution Approach 2:
The collar is designed with vibration-dampening properties and is positioned beforehand between the shank and drill portion to cushion against vibrations and stress before they can cause damage to the drill bit, extending its lifespan.
2Object-affected harmful factors
If the collar cross-section is increased to dampen vibrations, then vibration damping improves, but device complexity increases
Solution Approach 1:
The collar is designed with a non-uniform cross-section where the diameter varies along its length. The larger cross-section is positioned at specific locations where vibration damping is most needed, while other portions have smaller diameters to reduce overall complexity and material usage.
Solution Approach 2:
Instead of uniformly increasing the collar's cross-section throughout, the design varies the diameter along the length of the collar, adding dimensional variation to optimize vibration damping only where necessary while maintaining simplicity elsewhere.
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
The collar effectively reduces vibrations and stress, improving the drilling tool's lifespan and performance, especially for smaller diameter bits, by disrupting energy flow and providing additional mass and gradual diameter transitions.
Implementation Method 1
The collar is configured to dampen vibrations transferred between the shank portion and the drill portion during operation of the drilling tool
Data Source
AI summary
A drilling tool including a shank portion, a drill portion, and a collar. The shank portion includes a shank first end that is configured to be coupled to a power tool and a shank second end opposite the shank first end. The drill portion includes a drill first end, a drill second end, and a cutting head positioned at the drill second end. The collar is configured to dampen vibrations transferred between the shank portion and the drill portion during operation of the drilling tool. The collar includes a collar first end, a collar second end, and an apex. The collar first end is attached to the shank second end. The collar second end is attached to the drill first end. The apex defines a maximum outer dimension of the collar. The apex is positioned between the collar first end and the collar second end.