초록

The purpose of this study is to improve the durability by solving the crack problem of the steering gearbox bracket welded to the frame assembly. For the exact and effective analysis, we use charac- teristic(fishbone) diagram from the viewpoint of 4M1E. Through this analysis it was identified two kinds of problems, and develop improvement plan for it. Verification tests must be performed to confirm the improvement. So, the test method for steering gearbox bracket improvement was newly established by referring to similar case. As a result of the tests for verification, the stresses at crack point are decreased and the durability was improved about 2.6 times compared with product before improvement.

키워드

Steering gearbox bracket(조향기어박스 브래킷), Crack(균열), Durability(내구도), Military Light Truck(군용 소형트럭), Welding Defect(용접결함), Stress Concentration(응력집중), Characteristic Diagram(특성요인도)

참고문헌(9)open

  1. [기타] Ministry of Land, Infrastructure and Transport / 2017 / Rules for the performance and standards of automobiles and auto parts

  2. [기타] / 2014 / TOP 02-2-506, Wheeled and Tracked vehicle endurance testing

  3. [학술지] 백승엽 / 2010 / 용접이음부의 용접 피로수명 자동화 설계에 관한 연구 / 한국기계기술학회지 12 (3) : 11 ~ 18

  4. [학술대회] Taehong Yun / 2008 / A study on implementing the QC tools for systematic problem solving / Journal of the Korean Institute of Industrial Engineers spring conference 20 : 470 ~ 478

  5. [학술지] Y. Kim / 2012 / Method for Fatigue Strength Improvement of the Weld Structure(I) - Design of Welded Joints - / The Korean Welding and Joining Society 30 (1) : 5 ~ 7

  6. [학술지] 김광석 / 2009 / 차량동역학 시뮬레이션을 위한 가상노면 설계에 관한 연구 / 한국기계기술학회지 11 (4) : 7 ~ 13

  7. [학술지] 서권희 / 2013 / 한국형 소형전술 시제차량의 내구성능 평가 / 한국자동차공학회 논문집 21 (3) : 148 ~ 156

  8. [학술지] 서권희 / 2008 / 실 주행조건을 고려한 군용 소형트럭의 가상 내구해석 / 한국자동차공학회 논문집 16 (4) : 120 ~ 127

  9. [학술지] N. Obuli Karthikeyan / 2017 / Accelerated Lab Test Methodology for Steering Gearbox Bracket Using Fatigue Damage and Reliability Correlation / SAE Int. J. Commer. Veh. 10 (1) : 18 ~ 25