Milling Pick Elliptical Concave Tip for Wear Distribution
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Solution Overview
Problem
Existing milling picks face challenges in balancing material usage with the need for sufficient stability and cutting efficiency, particularly in road milling applications, where high material costs and centrifugal forces are concerns.
Innovation Solution
The milling pick features an elliptical contour in its concave area with a semimajor axis forming an acute angle with the central longitudinal axis, providing material reinforcement in the wear-bearing foot segment while maintaining a narrow front for high cutting efficiency, along with recesses and a frustoconical connection segment for optimized material usage and wear distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the pick tip is made with a larger amount of hard material to increase strength and stability, then the strength and stability are improved, but the material cost increases and weight increases leading to higher centrifugal forces
Solution Approach 1:
The patent applies local quality by creating a concave area with elliptical contour that concentrates material specifically in the foot segment where wear occurs most, while keeping the front part narrow for cutting efficiency. This non-uniform material distribution optimizes strength where needed while reducing overall material usage and cost.
2Stability of the object's composition
If the pick tip is made with a larger amount of hard material to increase stability, then the stability is improved, but the weight increases leading to higher centrifugal forces
Solution Approach 1:
The concave area with elliptical contour provides localized material reinforcement in the foot segment to enhance stability and wear resistance, while the overall reduced material volume decreases weight and centrifugal forces. This resolves the contradiction by achieving stability through strategic material placement rather than uniform material distribution.
3Productivity
If the front part of the pick tip is made narrow to increase cutting efficiency, then cutting efficiency is improved, but the strength and stability are reduced
Solution Approach 1:
The patent implements local quality by designing the pick tip with a narrow front part for efficient cutting while incorporating a concave area with elliptical contour that concentrates material in the foot segment. This creates a gradient structure where the front remains slim for productivity while the rear provides strength through localized material reinforcement.
4Quantity of substance
If the pick tip is designed to reduce material usage to save cost, then material cost is reduced, but the strength and stability are insufficient
Solution Approach 1:
The concave area with elliptical contour enables reduced overall material usage while maintaining strength through localized reinforcement in the foot segment. This resolves the contradiction by optimizing material distribution - using less material overall to reduce cost, but concentrating it strategically where strength is most needed.
Data Source
AI summary
The invention relates to a milling pick, in particular a round pick having a pick head and a pick tip, consisting of a hard material, wherein the pick tip has an attachment area, which is used to connect it to the pick head, wherein the pick tip has a concave area, which extends in the direction of the central longitudinal axis of the pick tip, and wherein the concave area has an elliptical contour. To achieve an improved resilience for such a milling pick, provision in made in accordance with the invention that the ellipse generating the elliptical contour is arranged in such a way that the semimajor of the ellipse and the central longitudinal axis of the pick tip form an acute angle.