Masonry Drill Bit Continuous Flute for Better Chip Evacuation
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Solution Overview
Problem
Masonry drill bits face inefficiencies in cutting through hard materials due to discontinuities between the body flute and cutting head flute, leading to reduced performance and wear.
Innovation Solution
A drill bit design featuring a body with a helically wrapped flute and a cutting head with lands and flutes that extend at a helix angle, forming a continuous flute, which enhances cutting efficiency and chip removal, and can be manufactured using additive processes like 3D printing for improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional masonry drill bit design with separate body flute and cutting head flute is used, then the manufacturing process is simpler, but the cutting efficiency and chip removal are reduced due to discontinuities between flutes
Solution Approach 1:
The patent merges the body flute and cutting head flute into a single continuous flute structure that extends from the distal end of the body through the cutting head. This integration eliminates discontinuities between separate flute sections, improving chip removal efficiency and cutting performance while maintaining manufacturability through unified flute geometry.
Solution Approach 2:
The continuous flute design ensures uninterrupted chip evacuation paths from the cutting edges through the entire length of the drill bit. The flute maintains consistent helical geometry and open structure throughout, enabling continuous removal of cutting debris without interruption at transition zones between body and cutting head.
2Reliability
If a continuous flute design is implemented, then chip removal and cutting efficiency improve, but the manufacturing complexity increases
Solution Approach 1:
The drill bit is divided into distinct functional segments: the body portion with its flute, the cutting head with integrated flute continuation, and the cutting edges. This segmentation allows each portion to be manufactured separately using optimized processes (such as forming the body flute traditionally and adding the cutting head with continuous flute geometry through additive manufacturing or specialized forming), then joining them while maintaining flute continuity.
Solution Approach 2:
The patent employs variable helix angles along the length of the continuous flute, transitioning from steeper angles at the cutting head to shallower angles in the body. This parameter variation optimizes chip removal at different locations while accommodating manufacturing constraints and material flow characteristics throughout the flute's length.
Data Source
AI summary
A drill bit includes a body having a first end, a second end, an axis of rotation defined through the first and second end, and a body flute that extends along the axis of rotation at a helix angle. The drilling tool also includes a cutting head attached to the second end of the body. The cutting head includes a first land, a second land, and a cutting head flute. The cutting head flute is defined between the first land and the second land. The cutting head flute extends along the axis of rotation at the helix angle such that the body flute and the cutting head flute form a continuous flute.