Drill Drag Measurement for Material and Wear Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current drilling techniques face challenges in accurately identifying materials being drilled, detecting wear, and managing parasitic phenomena like friction and chip jamming, which affect drilling quality and tool longevity.
Innovation Solution
A method and device that determine overall drag during drilling by stopping the operation, retracting the drill, and measuring load values to differentiate between internal friction and friction against the drilled material, allowing for real-time adjustments and alerts for abnormal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drilling operation continues without interruption to maintain productivity, then productivity is improved, but measurement precision of load values deteriorates due to unstable drilling conditions
Solution Approach 1:
The patent implements periodic interruption of the drilling operation at predetermined intervals to perform load value measurements. This periodic action allows the system to maintain overall productivity while obtaining accurate measurements during stable, interrupted states. The measurement phase alternates with drilling phases, creating a rhythmic cycle that satisfies both productivity and measurement precision requirements.
2Reliability
If drill is retracted over long distance to ensure cutting edges clear material, then measurement reliability is improved, but loss of time increases due to longer retraction and re-engagement cycles
Solution Approach 1:
The patent applies partial action by retracting the drill only over a predetermined distance sufficient to clear the cutting edges from the material, rather than fully withdrawing the drill. This partial retraction achieves the necessary measurement conditions while minimizing time loss. The distance is optimized to be just enough to ensure cutting edges clear the material without excessive movement.
3Manufacturing precision
If drilling parameters are continuously adjusted to adapt to different materials, then manufacturing precision is improved, but device complexity increases due to multiple sensors and control systems
Solution Approach 1:
The patent implements feedback by measuring load values during interrupted drilling operations and using these measurements to identify material types and adjust drilling parameters accordingly. The measured load values provide feedback about the material being drilled, which triggers automatic parameter adjustments. This feedback loop enables adaptive drilling with improved precision while keeping the control system relatively simple, as it relies on straightforward load measurement and pre-programmed material identification logic.
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
This approach enhances the reliability of material identification, wear detection, and chip evacuation, leading to improved drilling quality and reduced tool wear by addressing parasitic phenomena.
Implementation Method 1
due to the friction of the strips against the walls of the element to be drilled
Data Source
Figure 1a~1b
Figure 2~3
Figure 4~9
AI summary
The invention relates to a method for drilling a drilling element using a drilling device and a cutting tool comprising cutting edges and margins, said method comprising a step of determining at least one load value representative of the overall drag due to the internal friction of said drilling device and the friction of said cutting edges in said drilling element, this step comprising the following sub-steps: - stopping the drilling operation in progress; - partially retracting said cutting tool over a predetermined distance, said predetermined distance being chosen such that said cutting edges are no longer in contact with said drilling element; - driving said cutting tool with predetermined cutting parameters;- measurement of at least one load value during the training of said cutting tool with said cutting parameters before its cutting edges come into contact again with said element to be drilled, and after stabilization of said load values, said at least one measured load value being representative of said overall drag.