Drill Cutting Element with Gradient Abrasive Distribution
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Solution Overview
Problem
Drilling reinforced concrete and similar materials poses challenges with existing tools, such as high vibrations in hammer drills and rapid temperature increases in diamond core drills, which can lead to tool failure and user discomfort.
Innovation Solution
A cutting element for drills with a gradient distribution of abrasive particles, where diamond particles are concentrated at the periphery for high-speed efficiency and carbide particles at the axis for low-speed efficiency, reducing vibrations and noise, and incorporating lubricant structures to manage heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If diamond core drills are used without impact force, then user comfort is improved, but drilling efficiency decreases due to rapid temperature increase and tool failure
Solution Approach 1:
The cutting element implements local quality by creating a gradient distribution of abrasive particles where diamond particles (high-speed efficient) are concentrated at the periphery and carbide particles (low-speed efficient) are concentrated at the axis. This spatial differentiation allows each region to operate optimally at its respective speed, resolving the contradiction between user comfort and drilling efficiency
Solution Approach 2:
The cutting element uses composite materials by combining two types of abrasive particles (diamond and carbide) with different performance characteristics in a single cutting element. This composite structure enables the tool to simultaneously achieve high-speed cutting efficiency at the periphery and low-speed efficiency at the axis, eliminating the need for water cooling while maintaining high productivity
2Strength
If rotary hammers or impact drills are used with carbide tips, then drilling capability is improved, but user comfort deteriorates due to strong vibrations and impact force
Solution Approach 1:
The invention changes the parameter of abrasive particle distribution from uniform to gradient-based. By varying the concentration of diamond and carbide particles across the cutting element, the system achieves effective cutting without impact force, thereby maintaining drilling capability while significantly improving user comfort by eliminating vibrations
3Productivity
If diamond core drills operate at high speed, then productivity is improved, but temperature increases rapidly causing tool failure
Solution Approach 1:
The cutting element applies local quality by assigning different abrasive particle types to different radial positions. Diamond particles at the periphery handle high-speed cutting where path speed is higher, while carbide particles at the axis handle lower speed regions. This localized optimization allows high productivity without excessive temperature increase that would cause tool failure
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
Enhances drilling efficiency and tool longevity while reducing user discomfort by optimizing abrasive particle distribution and incorporating lubricant structures to manage heat and friction.
Implementation Method 1
the cutting element comprises at least one first type of abrasive particles, the content of abrasive particles of the first type increasing continuously or continuously and stepwise from the axis of rotation of the cutting element to the periphery of the cutting element
Data Source
Figure 1a~2b
Figure 3a~5b
Figure 6a~7b
AI summary
The invention relates to a cutting element for a drill, designed for rotating about a rotary axis (R) when drilling and comprising at least one first grinding particle type (1). In order to increase the effectiveness and service life of the cutting element, in particular when drilling reinforced concrete and similar materials, as well as user comfort, in particular by reducing vibration and noise, the content of grinding particles of the first type (1) increases continuously and/or incrementally from the rotary axis (R) of the cutting element to the periphery (P) of the cutting element.