Agricultural Cutting Tool Wear Resistance via Full-Surface Coating
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Solution Overview
Problem
Cutting and mixing tools in soil tillage equipment experience reduced service life and increased labor and fuel costs due to wear and erosion, particularly when solid carbide plates are used, and previous solutions like rib-like weld seams offer limited protection and increase traction resistance.
Innovation Solution
A cutting and mixing tool with a base body made of steel, featuring a solid hard metal plate at the tip and a full-surface, highly wear-resistant coating that eliminates edges and minimizes friction resistance, reducing wear and traction requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid carbide plates are used at the tip of cutting tools, then wear resistance is improved, but the base body steel experiences severe erosion at adjacent areas reducing service life
Solution Approach 1:
The patent combines the solid carbide plate with a coating applied directly on the base body steel in a continuous, integrated structure. The coating merges with the carbide plate at the transition zone, eliminating the vulnerable area between them and creating a unified protective system that prevents erosion at the interface.
Solution Approach 2:
The patent applies different materials with specific properties to different zones of the cutting tool: the solid carbide plate provides extreme wear resistance at the tip, the coating provides erosion protection at the transition zone, and the base body provides structural strength. Each zone has optimized local properties matching its functional requirements.
2Reliability
If rib-like weld seams are used to protect against abrasion, then wear resistance is improved, but traction resistance increases leading to higher fuel consumption
Solution Approach 1:
Instead of applying protective material in rib-like structures across the entire surface, the patent applies coating only in the specific transition zone between the carbide plate and base body. This localized application provides necessary protection without creating surface irregularities that would increase traction resistance and fuel consumption.
Solution Approach 2:
The patent uses a relatively thin coating layer that provides adequate protection without excessive material buildup. This minimalistic approach protects the vulnerable zone while maintaining a smooth surface that minimizes energy consumption during operation.
3Reliability
If a full-surface coating is applied, then wear resistance is improved and traction resistance is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent applies coating selectively only in the transition zone between the carbide plate and base body, rather than on the entire surface. This localized application reduces the amount of coating material needed and simplifies the manufacturing process while still providing protection where it is most needed.
Solution Approach 2:
The patent applies coating with slight excess beyond the precise transition zone boundaries, ensuring complete coverage of the vulnerable area. This partial excess action provides a buffer against manufacturing tolerances and ensures adequate protection without requiring perfectly precise application.
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 solution extends the service life of cutting tools, reduces labor and fuel costs, and enhances productivity by minimizing wear and traction resistance, while maintaining a smooth surface for optimal soil engagement.
Implementation Method 1
the front side of the base body, which engages in the ground, adjacent to the at least one solid hard metal platelet and/or the at least one solid hard metal plate does not have rib-like weld seams or partial applications, but has a full-surface coating, preferably with a highly wear-resistant coating
Implementation Method 2
The area adjacent to the solid hard metal plate is therefore subject to severe erosion during tillage
Implementation Method 3
The height level between the hard metal surface and the coating surface has essentially no or hardly any differences, with at least one full hard metal platelet and/or at least one full hard metal plate having no reinforcing coating
Data Source
Figure 1a~2b
Figure 3a~3b
AI summary
The tool has a base body (1) made from flat or profile steel and provided with full-hard metal plates (4) on a front side that is engaged into a ground. The front side of the base body is completely reinforced with a highly wear-resistant coating (3), where a surface of the coating is designed as a relatively smooth surface. A joint between the coating and the metal plates is filled with material e.g. soldering material. A hole (2) engages a fastening part, where hardness degree of the metal plates is larger than hardness degree of the coating.