Rotary Masonry Drill Bit with Centered Axial Groove
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Solution Overview
Problem
Rotary masonry drills face limitations in drilling rate and efficiency when used in porous materials like concrete, stone, and ceramic, often requiring hammer drilling which results in vibrations, noise, and increased energy consumption.
Innovation Solution
A rotary masonry drill bit with at least one groove centered on the axis of rotation, featuring two cutting edges with a groove width between 0.6 mm and 1.8 mm, and a diameter between 2 mm and 45 mm, designed for use in rotary drilling machines without pulsating axial movements, allowing for deeper drilling with reduced thrust load and improved ergonomics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional drill bit without a centered groove is used, then the structure is simple, but the drilling rate is low and thrust load is high
Solution Approach 1:
The drill bit is segmented into multiple functional zones: a centered groove dividing the tip into two symmetric portions, each with cutting edges. This segmentation allows simultaneous cutting action on both sides of the groove, increasing material removal rate while the groove itself removes waste material, thereby resolving the contradiction between drilling rate and structural simplicity
Solution Approach 2:
The invention introduces a new dimensional element - a groove extending along the axis of rotation - to the traditional drill bit tip geometry. This axial groove creates a three-dimensional structure that enables both lateral cutting by the cutting edges and axial waste removal, improving productivity without excessive complexity
2Productivity
If hammer drilling is used to drill in porous materials, then drilling can be achieved in hard materials, but vibrations, noise, and energy consumption increase
Solution Approach 1:
The invention replaces the hammer drilling mechanical system (percussive motion) with a rotary cutting system. The centered groove drill bit with cutting edges is designed to cut through porous materials by rotational motion alone, eliminating the need for hammering action. This substitution maintains drilling capability in hard porous materials while eliminating vibrations and noise associated with hammer drilling
3Productivity
If a wider groove is used to remove more waste material, then drilling efficiency improves, but the drill bit becomes less stable and more prone to breakage
Solution Approach 1:
The invention optimizes the groove parameters (width, depth, length) within specific ranges to achieve the best balance between waste removal and structural strength. The groove width is controlled to be sufficient for waste removal but not so wide as to compromise the integrity of the remaining drill bit structure, resolving the contradiction between productivity and strength
4Productivity
If the cutting edges are positioned to maximize cutting surface, then material removal rate increases, but thrust load on the drill increases
Solution Approach 1:
The centered groove segments the cutting action into two separate cutting zones on opposite sides of the groove. This segmentation distributes the thrust load across two cutting edges rather than concentrating it on a single tip, reducing peak thrust load while maintaining high material removal rate through simultaneous dual-side cutting
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 solution enables a higher drilling rate with reduced energy consumption and vibrations, extending the drill bit's lifespan and allowing for clean-cut holes in materials previously requiring hammer drilling, such as ceramic and glass.
Implementation Method 1
a rotary masonry drill bit with at least one groove centered on the axis of rotation, featuring two cutting edges
Implementation Method 2
drilling in porous materials such as concrete, stone, brick, tile, repair mortar... the cutting edges functions as chisels
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
In a rotary drill, the drill is provided with at least one groove, which has a center lying on the axis of rotation of the drill. The two end points of the groove define a groove width, and the drill is provided with two or more cutting edges. Two cutting angles are defined. The groove has a left side and a right side. The rotary drill can be used in a rotary drilling machine. The drill can be provided with a drill bit.