Webbed Notch Cutting Insert for Roof Drill Bit Debris Evacuation
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Solution Overview
Problem
Existing roof drill bits face inefficiencies in debris evacuation during drilling operations, leading to increased wear on hard cutting inserts and reduced drilling efficiency.
Innovation Solution
A hard cutting insert with inclined upper surfaces and webbed notches is designed to effectively evacuate drilling debris, featuring a slot in the roof drill bit body to house the insert, which is attached via brazing, and includes central cutting surfaces for efficient debris removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hard cutting inserts are used in roof drill bits, then the drilling operation can proceed, but drilling debris accumulates on the upper surface of the insert leading to increased wear and reduced drilling efficiency
Solution Approach 1:
The upper surface of the hard cutting insert is segmented by introducing webbed notches that divide the surface into multiple sections. These notches create channels for debris evacuation, preventing accumulation and improving drilling efficiency by allowing continuous removal of drilling debris from the cutting zone.
2Reliability
If conventional hard cutting inserts without debris evacuation features are used, then the insert structure remains simple, but wear on the insert increases due to debris accumulation
Solution Approach 1:
The insert structure is segmented with webbed notches on the upper surface, creating a multi-section design that facilitates debris removal. This segmentation reduces wear by preventing debris accumulation while maintaining reasonable structural complexity through the use of webbed (thin bridging) features rather than bulky removals.
Solution Approach 2:
The debris evacuation features are applied locally to specific areas of the insert - the webbed notches are positioned on the upper surface where debris accumulates during drilling. This local application of the evacuation feature addresses the wear problem at the critical location without unnecessarily complicating the entire insert structure.
Data Source
AI summary
A hard cutting insert for use with a roof drill bit includes a first webbed notch and a second webbed notch structured and arranged on the hard insert for removing or evacuating drilling debris from an upper surface of the hard insert during a drilling operation. A roof drill bit including a hard cutting insert having a first webbed notch and a second webbed notch structured and arranged on the hard insert.