Track Bushing Carburizing Time Reduction
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Solution Overview
Problem
The production of track bushings is a time-consuming and costly process due to the lengthy carburizing times required, typically taking between 10 and 24 hours, which affects the efficiency and labor involved in manufacturing endless tracks for undercarriage systems.
Innovation Solution
A method for producing track bushings that carburizes a medium carbon steel base material to a depth of less than 1000 microns in under 100 minutes, followed by hardening and tempering, utilizing techniques such as pit furnace carburizing and oil quenching to reduce processing time and improve surface hardness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional carburizing processes are used to achieve sufficient surface hardness and toughness, then the track bushing can endure operational loads, but the production time increases significantly (10-24 hours) and manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by modifying the carburizing process parameters: increasing temperature to 950-1050°C and adjusting carbon potential to 0.8-1.2% C, which accelerates carbon diffusion and reduces carburizing time while achieving the required surface hardness and case depth
Solution Approach 2:
The patent employs periodic action through the heat treatment sequence: carburizing followed by quenching and tempering. This periodic thermal processing achieves both surface hardening and core toughness in a controlled manner, reducing total processing time compared to traditional single-step carburizing
2Reliability
If deep carburizing to 3000 microns is performed to ensure adequate case depth for wear resistance, then the track bushing achieves sufficient abrasion resistance, but the processing time extends to 10-24 hours
Solution Approach 1:
The patent changes the carburizing parameters by increasing temperature to 950-1050°C and controlling carbon potential at 0.8-1.2% C, which dramatically increases the carbon diffusion rate. This allows achieving the required case depth with significantly reduced time compared to traditional lower-temperature carburizing processes
3Strength
If multiple heat treatment steps (carburizing, air cooling, re-heat hardening, tempering) are applied to achieve desired hardness, then the track bushing attains the necessary mechanical properties, but the manufacturing process becomes time-consuming and laborious
Solution Approach 1:
The patent merges multiple heat treatment operations into an integrated process: carburizing is combined with quenching in a single continuous operation, followed by tempering. This consolidation eliminates intermediate cooling and reheating cycles, reducing total processing time and improving production efficiency while maintaining the required hardness and mechanical properties
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
This approach significantly reduces the carburizing time by 80% compared to traditional methods, enhancing production efficiency and enabling potential automation in manufacturing, while maintaining the necessary hardness and toughness for the track bushings.
Implementation Method 1
carburizing a base material of the track bushing in less than 100 minutes and to a depth of less than 1000 microns
Implementation Method 2
deep carburized, forming carbon layers to depths of approximately 3000 microns on surfaces of the track bushing
Implementation Method 3
The method includes hardening the base material
Implementation Method 4
The method includes tempering the base material
Data Source
AI summary
A method for production of a track bushing for an undercarriage assembly is provided. The method includes carburizing a base material of the track bushing in less than 100 minutes and to a depth of less than 1000 microns. The base material is medium carbon steel. The method includes hardening the base material. The method includes tempering the base material.