Clamped Coring Unit for Accurate Stud Hole Cutting
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Solution Overview
Problem
Existing methods for drilling holes in wood frame construction are inefficient, inaccurate, and unsafe, often resulting in improper hole placement, airborne debris, and physical hazards due to the use of hand-held drill bits and open drill bits.
Innovation Solution
A coring unit with a clamping arrangement and a drive system that includes a rotatable tubular bit with a cutting surface, powered by an inverted torque motor and linear actuator, allowing for precise hole placement and minimization of slippage and debris, with a receptacle to capture the core for a clean work site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand-held drill+bit combinations are used to form holes in studs, then the operator has flexibility in drilling, but the hole placement accuracy deteriorates and the risk of breaching wiring or piping increases
Solution Approach 1:
The drilling system is segmented into a guide assembly that remains stationary and a drilling assembly that moves within the guide. This segmentation allows the guide to ensure accurate hole placement while the drilling assembly provides operational flexibility and power.
Solution Approach 2:
The guide assembly acts as an intermediary between the operator and the stud, providing predetermined hole locations through guide openings. This intermediary ensures accurate hole placement while allowing the operator to use various drilling tools.
2Ease of operation
If open drill bits are used for cutting holes, then the operator can see the drilling process, but airborne detritus enters the lungs or skin causing health hazards
Solution Approach 1:
A dust collection hood acts as an intermediary between the drilling bit and the operator's respiratory system. The hood captures airborne detritus at the source while allowing the operator to observe the drilling process through the guide assembly.
Solution Approach 2:
The dust collection system converts the harmful airborne detritus into captured waste material. The hood and collection mechanism transform the harmful airborne particles into contained debris that can be easily removed and disposed of.
3Device complexity
If hand-held drill units are used, then the equipment is simple and portable, but sudden slipping causes physical damage to the operator and work site
Solution Approach 1:
The system is divided into a stationary guide assembly anchored to the structure and a separate drilling assembly. This segmentation eliminates the slipping hazard by removing the handheld component while maintaining the ability to perform drilling operations.
Solution Approach 2:
The guide assembly provides predetermined hole locations and constraints before drilling begins. This beforehand positioning prevents sudden slipping by establishing fixed guidance paths that constrain the drilling assembly's movement.
4Manufacturing precision
If drum type bits are used for large diameter coring, then large holes can be drilled, but the operator must remove cut slugs from the drum bit between cuts reducing productivity
Solution Approach 1:
The cut core material is extracted from the drilling process and collected in a container attached to the drilling assembly. This extraction eliminates the need to manually remove slugs from the bit between cuts, significantly improving productivity.
Solution Approach 2:
The drilling assembly automatically collects and contains the cut core material during the drilling operation. This self-service feature eliminates the need for operator intervention to remove slugs, allowing continuous drilling operations.
5Productivity
If bits that reduce cut to sawn debris are used, then large diameter holes can be drilled continuously, but significant fine fibres are released into the air requiring later cleanup
Solution Approach 1:
The dust collection hood serves as an intermediary that captures fine fibres at the source before they can disperse into the air. This intermediary allows continuous drilling operations while preventing airborne contamination.
Solution Approach 2:
The dust collection system converts the harmful fine fibre release into contained debris. The hood captures and directs the fine fibres into a collection container, transforming an environmental hazard into manageable waste material.
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
The coring unit ensures safe, reliable, and efficient core formation with accurate placement, minimizing slippage and airborne debris, and maintaining a clean work environment by retaining the core for easy disposal.
Implementation Method 1
a bit comprising an elongated tubular body having a cutting surface at a first circular end of the elongated tubular body for cutting the core
Implementation Method 2
a clamping arrangement for releasably attaching the coring unit to a structure into which a core is to be cut
Data Source
AI summary
A coring unit comprises a clamping arrangement for releasably attaching the coring unit to a structure into which a core is to be cut. A bit is provided comprising an elongated tubular body having a cutting surface at a first circular end of the elongated tubular body for cutting the core. The unit includes a drive system adapted to rotate and linearly translate the bit so that the drive system rotates the bit and moves the bit with respect to the clamping arrangement to advance and retreat the bit through the structure to cut the core from the structure. A method of using the coring unit is also described. The unit and method permit an accurate, reliable, safe, and reproducible cutting of a hole in a structure. The unit and method find particular application in cutting holes in studs of wood frame structures to accommodate services such as wires and piping.