Laser-Clad Auger Flighting for Erosion Resistance Without Distortion
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Solution Overview
Problem
Agricultural augers experience erosion and reduced efficiency due to abrasive materials like dried corn, leading to performance degradation and potential damage to the equipment and the material being moved, with existing solutions like hard face coatings and ultrahigh molecular weight flighting being costly and labor-intensive with limited effectiveness.
Innovation Solution
A fabricated agricultural auger with a laser-hardened layer on the outer surface and laser cladding on the outer circumference edge, using materials like tungsten carbide or chrome carbide to enhance hardness and reduce wear, while minimizing heat input to prevent distortion and maintain metallurgical integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional weld face techniques are applied to address auger flight erosion, then erosion resistance is improved, but the flighting material is distorted and undesired metallurgical properties are imparted due to high heat input
Solution Approach 1:
The patent changes the thermal parameters of the hardfacing process by using laser cladding with controlled heat input instead of traditional welding. This allows the deposition of hardfacing material (such as metal ceramics or carbides) while maintaining precise temperature control to prevent flighting distortion and unwanted metallurgical changes in the thin-walled auger structure
Solution Approach 2:
The patent replaces the mechanical welding process with a laser-based cladding process. The laser provides localized, controlled heating that melts and fuses the hardfacing material to the auger flight surface without the excessive heat input of traditional welding, thereby achieving erosion resistance while preserving the structural integrity of the flighting
2Reliability
If hard face coatings including thermal spray, plating and heat treatments are applied to the flighting, then erosion resistance is improved, but the process becomes costly and labor intensive
Solution Approach 1:
The patent replaces multiple traditional hardfacing processes (thermal spray, plating, induction hardening) with a single laser cladding process. This consolidation reduces manufacturing steps, labor requirements, and overall cost while achieving superior erosion resistance through precise material deposition and controlled thermal processing
Solution Approach 2:
The laser cladding process serves multiple functions simultaneously: it deposits hardfacing material, controls heat input to prevent distortion, achieves precise material fusion, and creates a durable erosion-resistant surface. This multi-functionality eliminates the need for separate operations and reduces overall manufacturing complexity
3Adaptability or versatility
If the cross section of the flighting is thin, then the auger can be designed for specific applications, but high heat applied in traditional methods distorts the flighting material
Solution Approach 1:
The patent changes the thermal parameters by using laser cladding with precisely controlled heat input that is suitable for thin-walled structures. The laser process allows for adjustable power, speed, and focal point to match the specific thickness and material properties of the auger flighting, preventing distortion while maintaining design flexibility for various applications
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 significantly extends the lifespan of auger flighting by reducing wear and maintaining efficiency, as the laser-hardened and clad regions provide enhanced hardness without distorting the thin flight material, thus reducing the need for frequent replacements and associated costs.
Implementation Method 1
a laser hardened layer formed integrally with an outer surface of the base material
Implementation Method 2
The laser hardened layer may be at least .5 millimeter in depth thickness along the base material
Implementation Method 3
A clad material is deposited on the base material and forming at least one blunt edge along the body
Implementation Method 4
The clad material comprises a second hardness greater than the first hardness
Data Source
Figure 1
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Figure 4~4C
AI summary
A machine part for agricultural, turf, mining or construction equipment for processing material is provided. The machine part comprises a base material. A clad material is deposited on the base material to form at least one blunt edge along the body. The clad material comprises a second hardness greater than the first hardness.