Abstract
The Selection of the welding process is one of the most significant decision-making problems, and it involves a wide range of information following the type of product. Hence, the automation of knowledge through a knowledge-based system will significantly enhance the decision-making process and simplify for identifying the most appropriate welding processes. The aims of this paper for explicates a knowledge-based system developed for recognising the most suitable welding processes for repairing shredder hammer by using data envelopment analysis (DEA) and p-robust technique. The proposed approach is used for ranking six welding processes which are commonly used, namely shielded metal arc welding (SMAW), flux cored arc welding (FCAW), submerged arc welding (SAW), oxyacetylene gas welding (OAW), gas tungsten arc welding (GTAW), and gas metal arc welding (GMAW). In order to determine the best welding process among competitive welding processes for repairing of shredder hammer, ten parameters are used, namely the availability of consumable, welding process type (manual and automatic), flexibility of welding position, weld-ability on base metal, initial preparation required, welding procedures, post-weld cleaning, capital cost, operating factor, and deposition rate. Furthermore, the sensitivity analysis of regret value (p) is investigated in three cases proposed.
Highlights
Thailand is the fourth-largest sugar producer and the second largest sugar exporter in the world [1]
The shredder machine is essential for the sugar industry, but the cost that involved in the operation of shredder machine is expensive because the service life of shredder hammer is relatively short
The shredder hammer consists of carbon steel as the base metal, and hard-facing is stacked on the base metal using welding process
Summary
Thailand is the fourth-largest sugar producer and the second largest sugar exporter in the world [1]. The shredder hammer is used to shred sugarcane billets and pulverise sugarcane billet into a fibrous mat [2]. The shredder machine has 90250 of shredder hammers that rotate on a rotor at around 1000 RPM, and it can process sugarcane at 7,000-15,000 tonnes/day [3]. The shredder hammer needs to be checked for balance to prevent something that can damage the machine. The vibration monitoring system is the system for check balance of shredder hammer, if the shredder hammer broken during operation, this machine has to stop. The shredder hammer consists of carbon steel as the base metal, and hard-facing is stacked on the base metal using welding process. The hard-facing is a form surfacing that is applied to reduce wear, abrasion, impact, erosion, galling, and cavitation [4]
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