Failure Analysis of Spline Shaft in Beco Lathe

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• 作者：V. Praveen Kumar (1)
  G. Kempulraj (1)
  Shaju K. Albert (2)
  
• 关键词：Microcrack ; Microhardness ; Effective torque ; Fatigue ; Micrograph ; Angular deceleration
• 刊名：Journal of Failure Analysis and Prevention
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：13
• 期：6
• 页码：722-730
• 全文大小：
• 作者单位：V. Praveen Kumar (1)
  G. Kempulraj (1)
  Shaju K. Albert (2)
  
  1. Central Workshop Division, Indira Gandhi Centre for atomic Research, Kalpakkam, 603102, India
  2. Material Technology Division, Indira Gandhi Centre for atomic Research, Kalpakkam, 603102, India
  
• ISSN：1864-1245

文摘

The failure of Heavy Duty Facing Lathe has been systematically investigated using fractographic, metallographic, and analytical stress analysis methods. Failure occurred during machining of a large flange, the tool post had a collision with jaw of the rotating chuck and the spline shaft inside headstock was broken into two pieces. A detailed analysis of the fracture surfaces revealed partial damage of the surfaces due to their rubbing in operation and cleavage fracture in the remaining part of the surfaces. The stress analysis indicates that sudden reversing of the spindle had resulted in the stresses exceeding the fatigue limit of the shaft material. These stresses led to the formation of microcracks at the circlip groove. The collision accelerated the sudden failure of shaft. This failure analysis has led to identification of root cause and its elimination with corrective measures undertaken.