Design of Plasma Cutting Torch by Tolerance Propagation Analysis

공차누적해석을 이용한 플라즈마 절단토치의 설계에 관한 연구

  • 방용우 (명지대학교 기계공학과 대학원) ;
  • 장희석 (경기공업대학 치공구과) ;
  • 장희석 (명지대학교 기계공학과) ;
  • 양진승 (명지대학교 기계공학과)
  • Published : 2000.06.01

Abstract

Due to the inherent dimensional uncertainty, the tolerances accumulate in the assembly of plasma cutting torch. Tolerance accumulation has serious effect on the performance of the plasma torch. This study proposes a statistical tolerance propagation model, which is based on matrix transform. This model can predict the final tolerance distributions of the completed plasma torch assembly with the prescribed statistical tolerance distribution of each part to be assembled. Verification of the proposed model was performed by making use of Monte Carlo simulation. Monte Carlo simulation generates a large number of discrete plasma torch assembly instances and randomly selects a point within the tolerance region with the prescribed statistical distribution. Monte Carlo simulation results show good agreement with that of the proposed model. This results are promising in that we can predict the final tolerance distributions in advance before assembly process of plasma torch thus provide great benefit at the assembly design stage of plasma torch.

Keywords

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