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A Study on Development of One-Piece Manufacturing Process for Automotive Cowl Cross Bar

자동차용 카울크로스바의 일체화 성형 공정 개발에 관한 연구

  • 김홍석 (대구대학교 기계공학부) ;
  • 윤재웅 (대구대학교 기계공학부)
  • Received : 2017.10.11
  • Accepted : 2017.12.20
  • Published : 2017.12.28

Abstract

The automobile cowl cross bar which is a backbone frame part inside the cockpit module has been designed with more complex geometries recently due to demands of its enhanced functions and reduced weight of car. The traditional manufacturing process using welding between tubes with different diameters shows several problems such as poor mechanical characteristics and appearance, etc. Therefore, in this study, manufacturing processes which can eliminate the welding process were developed by applying one-piece metal forming processes such as tube drawing and radial swaging. As results, it was found that the one-piece manufacturing processes give better bending strength than the traditional welding process and the swaging process shows the lowest manufacturing cost.

Keywords

Cowl cross bar;One-piece manufacturing technique;Welding;Combined drawing;Swaging;Bending strength;Manufacturing cost

Acknowledgement

Supported by : 대구대학교

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