Core Drill Bit Stop With Through-Hole for Mandrel Integration
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Solution Overview
Problem
Existing drilling technologies are limited by the requirement for internal threads on drive shafts to accommodate core stoppers or spacers, restricting the use of centering mandrels and core stoppers simultaneously, leading to cumbersome and time-consuming assembly processes with potential contamination issues.
Innovation Solution
A drill bit and stop arrangement where the stop serves as both a core stopper and centering mandrel, featuring a fluid opening transverse to the drill bit's axis of rotation, allowing for a single assembly step and maintaining fluid connection during drilling, even if a drill core breaks off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drive shaft with an internal thread is used to attach a core stopper, then the core stopper can be securely attached, but the drive shaft cannot accommodate both a centering mandrel and a core stopper simultaneously
Solution Approach 1:
The stop is designed with a central through-opening that allows the centering mandrel to pass through it. The stop itself is attached to the drive shaft via an internal thread. This nesting arrangement enables the centering mandrel to be positioned through the stop during pre-drilling, and then the stop can remain in place to function as a core stopper during subsequent drilling operations, allowing both components to be used simultaneously without requiring separate attachment steps.
2Measurement precision
If a centering mandrel and core bit are separately attached to the drive shaft, then precise positioning can be achieved, but multiple assembly and disassembly steps are required which are time-consuming and prone to contamination
Solution Approach 1:
The invention combines the centering mandrel and core bit into a single integrated arrangement where the stop with the central through-opening serves as the common attachment interface to the drive shaft. This merging eliminates the need to separately attach and detach the centering mandrel and core bit, reducing the number of assembly steps while maintaining precise positioning capability through the through-opening design.
3Adaptability or versatility
If multiple separate components are attached to the drive shaft, then various functions can be achieved, but the risk of contamination during assembly increases
Solution Approach 1:
By merging the centering mandrel and core bit into a single integrated arrangement that attaches to the drive shaft through one common stop component, the number of separate attachment operations is reduced. This minimizes the exposure of threads and connection points to the environment, thereby reducing the risk of contamination from dust and other particulates during the assembly process.
Data Source
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AI summary
Arrangement (1) comprising at least one drill bit (2) and at least one stop (3) for a drill core (22) or parts of a drill core 22 produced in the course of a drilling operation, wherein the at least one stop (3) has at least one fluid opening (4) transverse to an axis of rotation (5) of the at least one drill bit (2), wherein the at least one stop (3) has a central through-opening (6) for receiving a centering mandrel (7).