Degradation Pick Hammer Element Impact Distribution
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Solution Overview
Problem
Degradation picks used in road milling, mining, and construction experience premature wear due to steel body degradation, leading to frequent replacements, despite advancements in wear resistance technologies.
Innovation Solution
A degradation pick design featuring a substantially conical frustum body with an integrally formed hammer element and shank, where the hammer element and shank are made of the same material, and a super hard cutting element is disposed on the narrow end, with options for hardfacing or hard surface coating to enhance wear resistance, and a specific geometry that includes a tapered sidewall, constant sidewall, and offset shank for improved impact distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a steel body is used for the degradation pick, then the pick can be manufactured with reasonable ease and cost, but the steel body wears down quickly leading to premature failure
Solution Approach 1:
The degradation pick combines a steel body with a super hard material tip (such as carbide or ceramic). The steel body provides toughness and ease of manufacture, while the super hard tip provides wear resistance. This composite structure resolves the contradiction by integrating two materials with complementary properties.
Solution Approach 2:
The pick applies different material properties to different regions: the steel body maintains uniform properties for structural integrity, while the tip region uses super hard material specifically where wear resistance is needed. This localized application of material properties addresses the wear issue without compromising the overall manufacturability.
2Productivity
If the degradation pick operates in high-impact applications, then productivity is improved, but the steel body experiences accelerated wear and fails prematurely
Solution Approach 1:
The combination of steel body with super hard tip allows the pick to withstand high-impact forces while resisting wear. The steel provides shock absorption capability for high productivity applications, while the hard tip maintains edge integrity over extended service life.
Solution Approach 2:
The pick is divided into functional segments: the steel body handles impact and structural requirements, while the separate super hard tip handles the cutting and wear-resistant functions. This segmentation allows each part to optimize its performance for its specific function.
3Reliability
If hard surface coatings or hardfacing materials are applied to the steel body, then wear resistance is improved, but the manufacturing process becomes more complex
Solution Approach 1:
Rather than applying complex coatings to the entire steel body, the invention uses a discrete super hard material tip that is mechanically or chemically bonded to the steel. This approach provides wear resistance while keeping the manufacturing process simpler than full-surface coating applications.
Data Source
AI summary
A body of a degradation pick may comprise a substantially conical frustum. A hammer element may be integrally formed with the substantially conical frustum and extend there from in one radial direction. A shank may protrude from the body opposite a narrow end of the substantially conical frustum.