Hardened Soil Tool Cutting Edge for Carrier Erosion Protection
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Solution Overview
Problem
Existing soil working tools, such as plowshares and cultivator tips, face premature failure due to erosion behind hard-material cutting elements, leading to breakage under abrasive wear, as the carrier material lacks sufficient support.
Innovation Solution
The hard-material cutting element is designed to form part of the cutting edge with a specific geometry that extends and protects the carrier, including a mounting piece and deflection surface, reducing erosion and optimizing material usage, while being securely fastened in a receptacle on the carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If hard-material elements are applied in the cutting region to increase service life, then wear resistance is improved, but the carrier material becomes eroded behind the hard-material element leading to breakage
Solution Approach 1:
The cutting element is extended in the depth direction to form an extension that covers the region behind the cutting edge. This dimensional extension allows the hard material to protect not only the cutting edge but also the carrier region behind it, preventing erosion-induced breakage while maintaining wear resistance.
Solution Approach 2:
The extension of the cutting element protrudes backward to cover and protect the carrier region before erosion can occur. This preliminary protective action prevents the harmful erosion effect from reaching the carrier material, thereby preventing breakage before it happens.
2Duration of action of moving object
If the cutting element forms part of the cutting edge to extend service life, then wear resistance is improved, but the material outlay of expensive hard material increases
Solution Approach 1:
The hard-material cutting element is strategically positioned to form the cutting edge and extend backward to cover only the critical regions requiring protection. This localized application ensures that expensive hard material is used only where necessary for wear resistance and erosion protection, optimizing material outlay while extending service life.
3Ease of operation
If the cutting element geometry is optimized for cutting performance, then tool engagement into soil is improved, but the risk of edge breakage increases
Solution Approach 1:
The cutting element is extended in the depth direction to create a longer, more robust structure. This dimensional extension provides additional support to the cutting edge, reducing the risk of breakage while maintaining effective cutting geometry for soil engagement.
Solution Approach 2:
The tool employs a composite structure combining hard-material cutting elements with the carrier material. This composite design allows the hard material to provide wear resistance and edge strength while the carrier provides structural support, achieving both good tool engagement and resistance to edge breakage.
Data Source
AI summary
A soil working tool for an agricultural machine includes a carrier that comprises a cutting region having a cutting edge, and one or more hard-material elements being arranged in the cutting region. The hard-material element is a cutting element that forms at least a part of the cutting edge.