Design and Manufacture of Composite Machine Tool Structures for High Speed Milling Machines

고속 밀링 머신용 복합재료 이송부의 설계와 제작

  • 서정도 (한국과학기술원 기계공학과 대학원) ;
  • 김학성 (한국과학기술원 기계공학과 대학) ;
  • 김종민 (한국과학기술원 기계공학과 대학) ;
  • 최진경 (고등기술연구) ;
  • 이대길 (한국과학기술원 기계공학과)
  • Published : 2002.05.01

Abstract

To maximize the productivity in machining molds and dies, machine tools should operate at high speeds. However, the productivity of mold manufacturing has not increased significantly because CNC milling machines have massive slides, which do not allow rapid acceleration and deceleration during the frequent starts/stops encountered in machining molds and dies. This paper presents the use of composites for these slides to overcome this limitation. The vertical and horizontal slides of a large CNC machine were constructed by bonding high-modulus carbon-fiber epoxy composite sandwiches to welded steel structures using adhesives. These composite structures reduced the weight of the vertical and horizontal slides by 34% and 26%, respectively, and increased damping by 1.5 to 5.7 times without sacrificing the stiffness. Without much tuning, this machine had a positional accuracy of $\pm5\mu\textrm{m}$ per 300 m of the slide displacement.

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