Masonry Drill Bit Chisel-Edge Structure for Reinforced Drilling
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Solution Overview
Problem
Existing masonry drill bits face challenges in achieving improved drilling progress, especially when drilling through reinforced materials, due to limitations in centering and wear resistance.
Innovation Solution
The design incorporates additional cutting edges and channels with leading and trailing webs that form point-thinned chisel edges, along with auxiliary cutting edges with axial ramps to enhance centering and reduce the risk of catching during drilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional transverse cutting edge is used, then the drilling progress is limited, but the structure is simpler
Solution Approach 1:
The transverse cutting edge is segmented into multiple discrete cutting tips arranged along the edge, allowing each tip to engage the material independently and progressively, thereby increasing drilling progress while maintaining a manageable structural complexity through modular arrangement
Solution Approach 2:
The cutting tips are arranged in a three-dimensional configuration along the transverse edge rather than a single point, extending the cutting action across multiple positions and depths, which enhances drilling progress by engaging material at various stages of the drilling cycle
2Reliability
If additional cutting edges and webs are added, then wear resistance is improved, but the device complexity increases
Solution Approach 1:
Different regions of the drill bit are assigned different functions: the leading webs are designed with cutting edges for material removal and wear resistance, while the trailing webs provide structural support and centering, allowing each component to be optimized for its specific role rather than requiring uniform complexity throughout
Solution Approach 2:
The webs serve multiple functions simultaneously: they provide structural support for the cutting tips, act as additional cutting edges when engaged, contribute to centering through their geometric arrangement, and distribute mechanical loads across the drill bit structure, thereby improving wear resistance without proportionally increasing complexity
3Manufacturing precision
If the trailing web is set back, then centering action is improved, but cutting action is reduced
Solution Approach 1:
The trailing web is positioned to perform centering and guidance functions before the main cutting action occurs, ensuring the drill bit is properly positioned and stabilized prior to engagement of the primary cutting edges, thereby improving centering precision without significantly impacting overall cutting productivity
Data Source
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AI summary
The invention is directed to a masonry drill bit having a shank (1) having an insertion end (2) and a drill head (3), wherein the main cutting edges (4, 5) each converge toward a transverse cutting edge (8) arranged in the central region of the drill head (3), wherein the transverse cutting edge (8) is formed in a substantially concave manner with two transverse cutting tips (11, 12) at its ends. It is essential that the transverse cutting edge (8) is formed by two adjacent channels (13, 14) and in that each transverse cutting tip (11, 12) is adjoined by two webs (15-18) which provide the lateral boundaries of the channels (13, 14) by forming additional edges, such that each channel (13, 14) has a leading web (16, 17) and a trailing web (15, 18).