Core Drill Feed Control Using Motor Signals for Material-Adaptive Drilling
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Solution Overview
Problem
Current automatic feed units for core drilling systems lack autonomy and efficiency, leading to increased wear on drill bits and requiring more operator input, especially for inexperienced users.
Innovation Solution
A feed unit with a motor and control unit that uses machine learning or classic signal processing to classify materials and drilling stages based on motor control interface data, allowing for autonomous adjustment of drill bit force and velocity to optimize the drilling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If current automatic feed units are used, then drilling operation can be performed, but the level of autonomy is limited and operator input is required
Solution Approach 1:
The feed unit automatically determines material currently engaged by the core drill bit and autonomously adjusts drilling parameters without requiring operator intervention. The system classifies materials based on motor control interface data and independently controls feed force and velocity, making the operation self-sufficient and eliminating the need for continuous operator input.
Solution Approach 2:
The system continuously monitors motor control interface data (current and voltage) and uses this feedback to dynamically adjust drilling parameters. The control unit processes real-time data to determine material engagement and automatically modifies feed force and velocity, creating a closed-loop control system that enhances autonomy while simplifying operation.
2Productivity
If manual or semi-automated feed mechanisms are used, then drilling can be performed, but the process complexity increases for inexperienced operators
Solution Approach 1:
The system replaces complex mechanical control mechanisms with an intelligent control system that uses machine learning or classic signal processing. Instead of requiring operators to manually adjust multiple mechanical parameters, the control unit automatically determines material engagement from motor data and adjusts drilling parameters, simplifying the operational process while maintaining high productivity.
Solution Approach 2:
The system dynamically changes drilling parameters (feed force, velocity) based on real-time material classification. By automatically adjusting these parameters according to the determined material type, the system optimizes drilling efficiency without requiring operators to understand or manage the complexity of parameter adjustments.
3Duration of action of moving object
If standard feed units are used, then drilling operation proceeds, but wear on the core drill bit increases
Solution Approach 1:
The system dynamically adjusts feed force and velocity based on real-time material classification. By continuously adapting drilling parameters to the specific material being engaged, the system optimizes the balance between drilling efficiency and drill bit wear, extending drill bit service life while maintaining high productivity throughout the drilling operation.
Data Source
AI summary
A feed unit (100) for feeding a core drill bit of a core drill system (190) into a work object, the feed unit comprising a feed motor (130) and a control unit (110), wherein the feed motor (130) is arranged to be mechanically connected to a device (194, 196) for feeding the core drill bit into the work object, and to be controlled by the control unit (110) via a motor control interface (120), wherein the control unit (110) is arranged to obtain a computer implemented classification model configured to classify a material engaged by the core drill bit into a pre-determined set of materials based on obtained data associated with the motor control interface, wherein the obtained data is indicative of a current and/or a voltage of the control interface, wherein the control unit is arranged to determine a material currently engaged by the core drill bit based on the classification model and the obtained data, and to control the feed motor based on the determined material.