Flat Apex PCD Strike Tip for Mining Pick Tools
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Solution Overview
Problem
There is a need for a pick tool with a super-hard tip that offers high material removal efficiency and resistance to wear and fracture, particularly in applications like road milling and mining.
Innovation Solution
A strike tip comprising polycrystalline diamond (PCD) material bonded to a carbide substrate at an interface boundary, featuring a flat apex area with a frusto-conical outer surface and a thickness between the apex and interface boundary ranging from 2.5 mm to 10 mm, designed to enhance material removal while minimizing fracture risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the strike tip has a sharp apex with small radius (1.27 to 3.17 mm), then material removal efficiency is improved, but the risk of fracture increases
Solution Approach 1:
The patent applies different geometric characteristics to different regions of the strike tip: the apex area has a flat surface with specific dimensions (1.27 to 3.17 mm radius) for efficient material removal, while the outer area has a frusto-conical surface with a larger radius (3.17 to 6.35 mm) for fracture resistance. This local differentiation allows each region to optimize its function independently.
Solution Approach 2:
The patent introduces a dimensional transition from the flat apex area to the frusto-conical outer area, creating a three-dimensional geometry that combines the benefits of both flat (for cutting efficiency) and conical (for strength) shapes. The thickness parameter (2.5 to 10 mm) provides an additional dimensional control to balance strength and sharpness.
2Reliability
If the strike tip thickness is increased (2.5 to 10 mm), then fracture resistance is improved, but material removal efficiency decreases
Solution Approach 1:
The patent varies the thickness locally across the strike tip: the apex area has a specific thickness range (2.5 to 10 mm) that provides sufficient strength while maintaining sharpness for cutting. The outer area has a different thickness characteristic that optimizes for fracture resistance. This local quality differentiation resolves the contradiction between overall thickness and material removal efficiency.
3Reliability
If the apex area is made flat with specific dimensions, then wear resistance is improved, but the sharpness for cutting is reduced
Solution Approach 1:
The patent creates a flat apex area with specific dimensions (1.27 to 3.17 mm radius) that provides wear resistance through its geometric stability, while the frusto-conical outer area with larger radius (3.17 to 6.35 mm) provides the sharpness needed for effective cutting. The flat apex acts as a stable cutting edge that maintains its shape during use.
4Reliability
If the outer area has a frusto-conical surface with larger radius, then fracture resistance is improved, but material removal efficiency decreases
Solution Approach 1:
The patent segments the strike tip into two distinct functional areas: the apex area for material removal and the outer area for fracture resistance. By dividing the single strike tip structure into functional zones with different geometric characteristics, the patent allows each segment to optimize for its specific function without compromising the other.
Data Source
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AI summary
A strike tip for a pick tool, comprising a strike structure joined to a substrate at an interface boundary, the strike structure comprising or consisting or super-hard material and the substrate comprising or consisting of carbide material; the strike tip having a proximate strike end coterminous with the super-hard material and a distal end defined by the substrate, a side connecting the strike and distal ends; the strike end including a flat apex area and an outer area extending from the apex to the side. The apex area is substantially less than the outer area, and is at least 1 square millimetre and at most 25 square millimetres.