Wear-Resistant Attack Tool Carbide Segment Design
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Solution Overview
Problem
Attack tools used in formation degradation processes, such as asphalt milling and mining, experience significant wear, leading to costly and time-consuming tool replacement, as existing solutions have limitations in extending tool life effectively.
Innovation Solution
A wear-resistant attack tool design featuring a base with a first cemented metal carbide segment bonded to a driving mechanism and a second metal carbide segment, optimized with specific geometries and superhard materials to absorb impact stresses and reduce wear, including the use of brazing techniques and superhard materials like polycrystalline diamond for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If traditional attack tools are used in formation degradation processes, then cutting ability is maintained, but tool life is short due to significant wear
Solution Approach 1:
The attack tool employs a composite structure combining a metal base material with cemented carbide segments. The cemented carbide segments are bonded to the metal base, creating a composite tool that leverages the toughness of metal and the wear resistance of carbide. This composite material approach directly addresses the wear problem while maintaining cutting efficiency.
Solution Approach 2:
The invention applies hard, wear-resistant cemented carbide segments only at the attack surface where wear occurs most severely, while the bulk of the tool remains as tougher metal material. This local application of hard material optimizes wear resistance at the critical interface without compromising overall tool toughness or requiring excessive carbide content throughout the entire tool.
2Duration of action of moving object
If tool life is extended through wear-resistant materials, then replacement frequency decreases, but cutting efficiency may be compromised
Solution Approach 1:
The composite structure of metal base with carbide segments provides both extended tool life through wear resistance and maintained cutting efficiency through the sharp, geometrically precise carbide segments. The carbide segments retain their cutting edges longer while still performing effectively at the cutting interface.
Solution Approach 2:
By concentrating the hard, wear-resistant carbide material at the cutting surface while maintaining a tougher metal base, the tool achieves local optimization for both wear resistance and cutting performance. The carbide segments provide the necessary hardness for extended life while their precise geometry ensures cutting efficiency is not compromised.
3Duration of action of moving object
If multiple carbide segments are bonded to extend tool life, then wear resistance improves, but manufacturing complexity increases
Solution Approach 1:
The attack tool is divided into distinct segments: a metal base and multiple carbide segments that can be independently manufactured and then bonded together. This segmentation allows each component to be optimized and manufactured separately using appropriate processes, then assembled through bonding operations. The modular segmented design facilitates wear-resistant performance while managing manufacturing complexity through standardized components and assembly procedures.
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 design significantly extends the life of attack tools by reducing wear and improving degradation rates, minimizing downtime and costs associated with frequent replacements, while maintaining cutting efficiency and distributing impact stresses effectively.
Implementation Method 1
The first end has a cross sectional thickness of about 0.250 to 0.750 inches and the second end has a cross sectional thickness of about 1 to 1.50 inches
Implementation Method 2
A braze material may be disposed in a second interface between the first carbide segment and the second carbide segment
Data Source
AI summary
In one aspect of the invention, an attack tool has a wear-resistant base suitable for attachment to a driving mechanism. A first end of a generally frustoconical first cemented metal carbide segment bonded to the base. A second metal carbide segment is bonded to a second end of the first carbide segment at an interface opposite the base. The first end has a cross sectional thickness of about 0.250 to 0.750 inches and the second end has a cross sectional thickness of about 1 to 1.50 inches. The first cemented metal carbide segment also has a volume of 0.250 cubic inches to 0.600 cubic inches.