Drill Hoist Speed Control for Angled Mast Stability
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Solution Overview
Problem
Existing drilling machines face challenges in maintaining stability and preventing 'fallback' during angled drilling operations, where material falls back into the hole, affecting the effectiveness of explosives and consistency in ground material removal.
Innovation Solution
The implementation of a machine with a control unit that monitors and automatically adjusts the hoisting speed and drill rotation speed based on the mast angle, determining a desired speed that is less than the maximum when the mast is angled, to prevent excessive fallback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If standard default automatic drill hoist speed and drill rotation speed are used during angled drilling, then drilling efficiency is maintained, but excessive fallback occurs when the mast angle is greater than zero
Solution Approach 1:
The patent applies dynamics by making the hoist speed and drill rotation speed adjustable based on mast angle. The system dynamically changes operating parameters according to the drilling condition (vertical vs. angled drilling), allowing optimal performance across different scenarios rather than using fixed standard speeds
Solution Approach 2:
The patent changes operational parameters (hoist speed and rotation speed) based on the mast angle parameter. When the mast angle exceeds a threshold, the system automatically reduces these parameters to prevent excessive fallback, directly addressing the technical contradiction through parameter adjustment
2Productivity
If higher hoist speed is used during retraction, then drilling productivity increases, but material falls back into the hole creating harmful effects
Solution Approach 1:
The patent implements feedback control by monitoring the mast angle and automatically adjusting hoist speed based on the detected angle. The system receives feedback about the drilling condition and modifies operational parameters accordingly, reducing speed when angled drilling is detected to prevent fallback
3Object-generated harmful factors
If automatic speed adjustment based on mast angle is implemented, then fallback is reduced, but device complexity increases due to additional monitoring and control mechanisms
Solution Approach 1:
The patent applies universality by integrating the mast angle monitoring function into the existing control system. The same control unit that manages drilling operations also monitors mast angle and automatically adjusts parameters, making the system multi-functional without adding separate dedicated hardware for each function
Data Source
AI summary
A method automatically for adjusting the hoist speed of a drill is disclosed. The method includes determining the mast angle of the drilling implement relative to a work surface, and changing the hoisting speed of the drill implement depending on the mast angle.