Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Study on CNC plasma-cutting worktable with improved lifetime

CNC 플라즈마 절단 작업테이블의 수명 향상에 관한 연구

  • Na, Yeong-min (Dep. of Mechanical Engineering, Changwon National UNIV.) ;
  • Lee, Hyun-seok (Dep. of Mechanical Engineering, Changwon National UNIV.) ;
  • Kang, Tae-hun (Dep. of Mechanical Engineering, Changwon National UNIV.) ;
  • Park, Jong-kyu (Dep. of Mechanical Engineering, Changwon National UNIV.)
  • Received : 2015.04.28
  • Accepted : 2015.05.29
  • Published : 2015.06.30
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Abstract

There are many systems for cutting plates or pipes into a desired shape. A typical system is a plasma cutter. It uses plasma, which means that an effective design of the table supporting the workpiece is an important issue in order to ensure a long operational career. Conventional roller-support worktables have a short lifespan due to scratches from the plasma, and it is also difficult to maintain the roller balance. By using a bolt-fastening method, deformation and failure of the final product can occur due to the stress concentration at bolting points. To escape these issues, a polygon support and bracket fastening method was designed. Due to polygons having a number of support surfaces, when one surface has been damaged, it is possible to reuse the support by utilizing a different surface. The bracket-fastening method can extend the worktable lifetime and increase productivity by reducing stress concentration. In this paper, the polygon support/bracket-fastening method is compared with existing technologies. Consequently, performance benchmarks are verified through a structure analysis and experimentation.

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