Reversible Plow Point Geometry and Carburized Surface for Low Resistance
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Solution Overview
Problem
Existing reversible plows face issues with high operating resistance, wear, and failure due to mismatched surface parameters and soil interaction, leading to increased energy consumption and component breakdowns.
Innovation Solution
A modeling and manufacturing method that combines 3D software modeling, discrete element simulation, and optimized material composition (with Nb, V, and Ni elements) for the plow point, along with a carburizing process, to enhance strength, toughness, and wear resistance while reducing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional optimization methods and local hard alloy welding are used, then manufacturing complexity is reduced, but wear resistance and service life are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the steel (adding Nb, V, Ti, B elements) and heat treatment parameters (carburizing temperature, time, quenching temperature) to achieve enhanced wear resistance and mechanical properties without complex manufacturing processes
Solution Approach 2:
The patent creates a composite structure through carburizing treatment, forming a high-carbon surface layer (0.7-1.0% C) with high hardness and wear resistance, while the core maintains lower carbon content (0.3-0.5% C) for toughness, achieving a composite material effect within the same component
2Force
If plow body surface parameters are optimized using traditional methods, then manufacturing simplicity is maintained, but operating resistance remains high
Solution Approach 1:
The patent uses discrete element simulation to optimize geometric parameters including plowshare surface curvature radius (R1=50-150mm, R2=20-50mm), plowshare angle (40-50°), and side wall angle (60-80°), achieving reduced operating resistance through scientifically determined parameter values
3Strength
If high carbon content is increased to improve surface hardness, then wear resistance improves, but toughness and impact resistance deteriorate
Solution Approach 1:
The patent applies local quality by creating a gradient carbon distribution where the surface layer has high carbon content (0.7-1.0% C) for hardness and wear resistance, while the core maintains lower carbon content (0.3-0.5% C) for toughness, with a transition zone in between
Solution Approach 2:
The carburizing process creates a composite structure with a high-carbon martensitic surface layer and a lower-carbon韧性 core, combining the advantages of both high hardness and high toughness in different regions of the same component
4Productivity
If operating speed is increased to improve productivity, then energy consumption increases and wear accelerates
Solution Approach 1:
The patent optimizes surface geometric parameters including curvature radii (R1=50-150mm, R2=20-50mm), angles (plowshare angle 40-50°, side wall angle 60-80°), and surface finish through carburizing to reduce friction and drag, enabling high-speed operation with lower energy consumption
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 method results in a plow point with improved strength, toughness, and wear resistance, reducing energy consumption and preventing failure under high-speed conditions, with cost-effective industrial applicability.
Implementation Method 1
a carburizing process, to enhance strength, toughness, and wear resistance
Implementation Method 2
The variation of carbon content along the thickness direction in the carburized layer was tested
Implementation Method 3
carburizing-quenching-tempering treatment
Implementation Method 4
carburizing-quenching-tempering treatment
Implementation Method 5
carburizing-quenching-tempering-shot peening-spraying plastics
Data Source
AI summary
The present invention provides a modeling and manufacturing method for a reversible plow point with the characteristics of a low resistance and being strong inside and hard outside. By means of performing parameter optimization, three-dimensional modeling and numerical simulation analysis on a curved surface of a plough point, parameters, i.e. a plowshare angle λ0, a plowshare surface angle ε, an included angle η between a soil trace and a plowshare edge, and a soil lifting angle θ, at which the lowest working resistance is achieved, are determined, and composition optimization design and die forging-machining-carburization-quenching-tempering treatment are performed on a base material of the plough point, such that a new reversible plow point with the characteristics of a low operation resistance, high strength toughness of a core portion, and high wear resistance of a surface layer is obtained. The present invention can effectively solve the problems of wear, failure and resistance increase which easily occur due to a plough point being subjected to high-speed impact and wear from soil, sand, stones and root blocks for a long period of time during a service process, and the present invention is expected to be widely applied to the field of manufacturing of soil contact components of agricultural machinery.