Drilling Apparatus Control for Penetration Rate and Hole Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current drilling apparatuses fail to maintain a continuous maximum penetration rate of rock throughout the length of a hole while ensuring hole accuracy, as no apparatus has successfully controlled the drill to optimize both rotation torque and feed force for varying rock types.
Innovation Solution
A method and system for controlling a drilling apparatus by applying a rotation torque and a feed force with a predetermined modulating frequency signal, where the optimum feed force is determined periodically from sensed data, using pressure and flow control valves to adjust rotation and feed pressures, ensuring optimal penetration rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a drilling apparatus applies rotation torque and feed force to drill rock, then penetration rate increases, but hole accuracy deteriorates
Solution Approach 1:
The patent applies dynamic control by continuously adjusting feed force and rotation torque based on real-time sensed data from the drilling operation. The system modifies operating parameters dynamically rather than using fixed settings, allowing the drill to adapt to varying rock conditions while maintaining both high penetration rate and hole accuracy throughout the drilling process
Solution Approach 2:
The patent implements a feedback control system that continuously senses drilling parameters (such as rotation torque, feed force, and penetration rate) and uses this information to automatically adjust operating conditions. This closed-loop control ensures the drill maintains optimal performance by correcting deviations in real-time, simultaneously achieving maximum penetration rate and precise hole accuracy
2Productivity
If feed force is increased to maximize penetration rate, then productivity improves, but control precision deteriorates
Solution Approach 1:
The patent uses feedback control to continuously monitor feed force and rotation torque applied during drilling. By sensing actual operating conditions and comparing them with target values, the system automatically adjusts parameters to maintain precise control even when operating at high penetration rates, preventing loss of control precision despite increased productivity demands
Solution Approach 2:
The patent applies periodic modulation to feed force and rotation torque parameters during drilling operations. This periodic variation allows the system to explore optimal parameter ranges and maintain precise control by cycling through different operating conditions, ensuring both high penetration rate and accurate parameter control are achieved
Data Source
AI summary
A method for controlling a drilling apparatus comprising the steps of applying a rotation force to a drilling part of the drilling apparatus, applying a feed force to the drilling part with the feed force comprising a predetermined modulating frequency signal and predetermined feed force, wherein optimum predetermined feed force is determined periodically from sensed data relating to at least one of the rotation force and feed force to optimise the penetration rate of the drilling apparatus.