Drill Bit Indicator Area for Accurate Borehole Depth
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Solution Overview
Problem
Existing drilling tools lack a reliable and easy-to-use borehole length indicator, making it difficult to accurately determine the required hole length for different diameters, leading to excessive wear and adjustment challenges when drilling through masonry materials like brick, concrete, and stone.
Innovation Solution
A drilling tool with a shank, working area, and head featuring an indicator area with varying groove depth and cross-section, designed to be optically detectable during rotation, allowing for precise visualization of the ideal borehole length, while maintaining effective dust removal without clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rod is positioned between the chuck and handle to indicate borehole length, then the hole length can be defined by contact with the wall, but it is cumbersome to adjust rod length for different diameters and forces/moments cause shifts and wear
Solution Approach 1:
The patent extracts the length indication function from a mechanical rod system and integrates it directly into the drill bit structure through grooves of varying depth. This eliminates the need for separate rod adjustment mechanisms while maintaining accurate depth indication for different bore diameters.
Solution Approach 2:
The groove structure serves multiple functions simultaneously: it maintains structural integrity of the drill bit, removes drilling dust, and provides visual length indication. The varying groove depth encodes multiple length information for different bore sizes without requiring separate indication systems.
2Measurement precision
If the indicator area is created by removing material to increase core thickness, then the indicator area stands out visually, but dust removal capability may be affected
Solution Approach 1:
The patent applies local quality by creating an indicator area with modified groove characteristics (reduced depth or different cross-section) at a specific location. This localized modification provides visual indication while the surrounding grooves maintain their full depth and effectiveness for dust removal.
Solution Approach 2:
The groove structure is segmented into different sections: indicator areas with modified characteristics for visibility, and regular groove sections for dust removal. This segmentation allows each section to optimize its specific function without compromising the other.
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 solution provides a reliable and easy-to-use borehole length indicator that reduces wear and improves drilling efficiency by ensuring accurate hole lengths, enhancing user experience and tool longevity.
Implementation Method 1
The indicator area is visually detectable by the user during rapid rotation of the drill bit, such as occurs during drilling with a power drill
Implementation Method 2
The working area has one or more spiral flutes that serve to remove drilling dust
Implementation Method 3
The head is used to cut the hole. It is common practice to equip the head with a carbide insert. This reduces wear on the head.
Implementation Method 4
Drilling tools for drilling, in particular, masonry made of brick, concrete, reinforced concrete, and stone
Data Source
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AI summary
The invention relates to a drilling tool comprising a shank (1), a working area (3), and a head (5) with a tip (5a). The working area has at least two grooves (7) circumferentially around the tool axis. An indicator area (11) is provided at a predetermined position in the working area, which is located a predetermined distance (I) from the tip of the head along a longitudinal axis of the drilling tool. The depth of the grooves (7) in the indicator area differs from the depth of the grooves between the head and the indicator area (11) and from the depth of the grooves between the indicator area (11) and the shank.