Automated Core Drilling Device with Center-Mounted Catcher
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Solution Overview
Problem
Existing core drilling technologies lack the capability to safely and efficiently access hazardous waste containers by drilling a core sample without allowing it to fall into the container, posing risks of hazardous liquid splash and contamination.
Innovation Solution
An automated core drilling device with a rigid drilling tower and custom software-controlled drilling process that adjusts feed rate based on spindle motor current draw and drill bit RPM, combined with a core catching device to securely retrieve the core sample, ensuring safe and efficient drilling and sample retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated computer-controlled drilling process is used to adjust feed rate based on motor current draw and RPM, then drilling efficiency and safety are improved, but device complexity increases
Solution Approach 1:
The control system continuously monitors spindle motor current draw and RPM, using this feedback to automatically adjust feed rate in real-time. This closed-loop control optimizes drilling efficiency while preventing unsafe conditions, resolving the contradiction between productivity and complexity through intelligent automation.
Solution Approach 2:
The drilling system performs self-regulation by automatically adjusting its own operating parameters (feed rate) based on monitored conditions (current draw and RPM). This self-service capability eliminates the need for constant operator intervention, improving productivity while making the complexity manageable through automation.
2Reliability
If core catching device with center-mounted support is used to prevent core sample from falling into container, then safety is improved, but device complexity increases
Solution Approach 1:
A core catching device with a center-mounted support member acts as an intermediary between the drilling operation and the hazardous container. This support member extends through the core sample to provide balanced support, preventing the core from falling into the container. The mating capability between drilling device and core catcher creates an integrated safety system that justifies the added complexity.
Solution Approach 2:
The system is divided into separable components: the core drilling device and the core catching device. The catching device can be attached to the drilling device via a mating mechanism, allowing the safety function to be added modularly. This segmentation enables the safety improvement without permanently complicating the base drilling device.
3Manufacturing precision
If rigid drilling tower is used to maintain precise vertical alignment, then manufacturing precision is improved, but device complexity and weight increase
Solution Approach 1:
The rigid drilling tower provides concentrated structural support and alignment precision specifically at the drill bit location, while other parts of the system can be less rigid. This localized precision approach achieves the required manufacturing precision without making the entire device overly complex or heavy.
Data Source
AI summary
An automated core drilling device comprising a rigid drilling tower, a floating chuck assembly, and a drill bit. Rigid drilling tower comprising at least three vertical column members, a lower perimeter frame, and an upper perimeter frame. Floating chuck assembly comprising a drill bit axis-of-rotation vertical clearance channel, at least three horizontal support arms, at least three feed motor platforms, at least three feed motors, a hub casing, a hollow-centered bit driveshaft, a bit driveshaft sprocket, an offset spindle driveshaft sprocket, an offset spindle driveshaft, and an offset spindle motor. An automated core drilling device further comprising a computer with custom software, a monitor point for the electric current draw of said offset spindle motor or a monitor point for the revolution rate of said offset spindle driveshaft, and a control point for the electric current draw of each of said at least three feed motors.