Design and development of fixture and force measuring system for friction stir welding process using strain gauges

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• 作者：Biswajit Parida (1)
  Shiv Dayal Vishwakarma (1)
  Sukhomay Pal (1)
  
• 关键词：Friction stir welding ; Fixture ; Strain gauge ; Force measuring system ; Elastic member ; Plunging force ; Amplification
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：29
• 期：2
• 页码：739-749
• 全文大小：1,320 KB
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• 作者单位：Biswajit Parida (1)
  Shiv Dayal Vishwakarma (1)
  Sukhomay Pal (1)
  
  1. Department of Mechanical Engineering, IIT, Guwahati, 781039, India
  
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824

文摘

We developed a clamping system and an instrumented setup for a vertical milling machine for friction stir welding (FSW) operations and measuring the process forces. Taking into account the gap formation (i.e., lateral movement) and transverse movement of the workpiece, a new type of adjustable fixture was designed to hold the workpiece being welded. For force measurement, a strain gauge based force dynamometer was designed, developed and fabricated. The strain gauges were fitted into the specially designed octagonal members to support the welding plates. When the welding force was applied onto the plates, the load was transferred to the octagonal members and strain was induced in the member. The strains of the strain gauges were measured in terms of voltages using a Wheatstone bridge. To acquire forces in FSW operations, a data acquisition system with the necessary hardware and software was devised and connected to the developed setup. The developed setup was tested in actual welding operations. It is found that the proposed setup can be used in milling machine to perform FSW operations.