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http://dx.doi.org/10.5762/KAIS.2021.22.6.188

A Study on Quality Improvement through Analysis of Hub-reduction Failure Occurrence Mechanism for Military Vehicles  

Kim, Sung-Gon (Land-system Center, Defense Agency for Technology and Quality(DTaQ))
Kim, Seon-Jin (Land-system Center, Defense Agency for Technology and Quality(DTaQ))
Yun, Seong-Ho (Land-system Center, Defense Agency for Technology and Quality(DTaQ))
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.6, 2021 , pp. 188-196 More about this Journal
Abstract
For the tactical vehicles operated by the Korean army, the hub-reduction portal axle was applied considering Korea's topographical characteristics. Hub-reduction was applied to a Korean military vehicle to increase the vehicle body to secure ground clearance and improve the driving capability on rough roads, such as unpaved and field land by increasing the torque. The Korean military is operating tactical vehicles after various performance tests, including durability driving, but wheel damage occurred in one of the vehicles operating in the front units. Failure analysis revealed many damaged parts, including the hub, making it difficult to determine the cause. Therefore, an analysis of the failure occurrence mechanism for each damaged part was conducted, which confirmed that the cause of wheel breakage was a hub. Furthermore, the root cause of the hub breakage was a crack due to internal pores and foreign matters. In addition, a realistic improvement plan that can be applied throughout the design, manufacture, and shipping stages was presented using the fishbone diagram analysis. The derived improvement plan was verified through unit performance tests, including CAE and actual vehicle tests, and by reflecting this, the driving safety of Korean tactical vehicles was improved. Finally, it is expected that the proposed method for analyzing the failure occurrence mechanism will be used as reference material when analyzing the quality problems of similar military vehicles in the future.
Keywords
Quality Improvement; Hub-Reduction; Failure Occurrence Mechanism Analysis; Fish-Bone Diagram; Military Vehicle;
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