Wear Resistant Cutting Tool With Composite Carbide Steel Body
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Solution Overview
Problem
Cutting tools used for impinging earth strata, such as asphaltic roadway material and coal deposits, experience significant wear due to severe operating forces, leading to frequent replacements and reduced tool life.
Innovation Solution
A cutting tool design featuring a partial frusto-conical head portion with specific lateral and terminal edges, combined with a hard cutting tip made of cemented tungsten carbide and coated with superhard materials like polycrystalline diamond or cubic boron nitride, enhances strength, durability, and wear resistance, and creates a wedge effect for efficient substrate separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cutting tools are used for impinging earth strata, then cutting operation can be performed, but the tools experience severe wear and have reduced tool life
Solution Approach 1:
The cutting tool body is constructed from composite materials including a cemented carbide cutting portion and a steel support portion, combining the high hardness and wear resistance of cemented carbide with the toughness and strength of steel. This composite structure allows the tool to withstand severe operating forces while resisting wear from impinging earth strata, directly resolving the contradiction between reliability and wear resistance.
Solution Approach 2:
The cutting tool employs local quality by applying different materials to different portions of the tool. The cutting portion at the impingement point is made of hard, wear-resistant cemented carbide, while the support portion is made of tougher steel to absorb impact forces. This localized material differentiation optimizes each region for its specific function, enhancing overall tool life while managing wear at the critical cutting interface.
2Object-affected harmful factors
If harder cutting members are used to increase wear resistance, then wear resistance improves, but the tool body may lack strength to withstand severe operating forces
Solution Approach 1:
The tool combines cemented carbide for wear resistance at the cutting portion with steel for strength and toughness in the support portion. This composite material strategy allows each material to perform optimally in its designated region, resolving the contradiction between wear resistance and overall structural strength.
Solution Approach 2:
The cutting tool is segmented into distinct functional portions: a hard, wear-resistant cemented carbide cutting portion and a tougher steel support portion. This segmentation allows the hard material to be concentrated only where wear resistance is critical, while the support structure uses materials optimized for withstanding severe operating forces, thus balancing wear resistance and strength.
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 enhanced cutting tool exhibits improved strength, durability, and wear resistance, resulting in extended tool life and reduced production of small particles during cutting operations.
Implementation Method 1
The hard cutting tip may include a superhard coating of, for example, polycrystalline diamond or cubic boron nitride
Data Source
AI summary
A cutting tool includes a cutting tool body having an axial forward end, an axial rearward end, a head portion adjacent the axial forward end and a shank portion adjacent the axial rearward end. The head portion includes a partial frusto-conical portion having a first lateral edge and a second lateral edge; a first side surface having a first lateral transition edge and a first terminal edge, wherein the first lateral transition edge is adjoined to the first lateral edge of the partial frusto-conical portion; and a second side surface having a second lateral transition edge and a second terminal edge, wherein the second lateral transition edge is adjoined to the second lateral edge of the partial frusto-conical portion, and wherein the first terminal edge is adjoined to the second terminal edge to form a cutting edge. The cutting tool also includes a hard cutting tip.