지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2013.5
- 수록면
- 819 - 824 (6page)
이용수
초록· 키워드
오류제보하기
The study presents how the characteristic of brake tube nut surface treatment can be affected brake oil leak at pipe connection area. Brake oil leak issue is one of the most chronic problems in Automobile manufacturing and as the issue is normally approached by torque increase for containment or improving part quality and assembly quality, the problem is fluctuated due to the quality control.
According to vehicle corrosion requirement is gradually severe and workers require easier finger-start for brake pipe installation, brake tube nut surface treatment is selecting ZnNi rather than Zn. If we control the same coefficient of friction spec for both, there is no difference for sealing performance in theoretical.
Even though Zn surface treatment is regarded better sealing performance than ZnNi empirically by sealing mark test result, there was no objective evidence of relationship between sealing mark and brake oil leak and it is very difficult to define with CAE analysis
So, we approached this issue as below
- Comparison brake pipe flare and tube nut
- Comparison leak test with brake pipe and tube nut each supplier
- Comparison leak test with different machining method to increase thread length
- Comparison leak test with pipe misalignment condition
- Comparison seal mark test according to tube nut friction of surface treatment
- Comparison seal mark test for tube nut surface treatment (ZnNi vs Zn)
From the experimental study, we verified what dominant factor is for brake pipe sealing. We checked the ZnNi surface treatment has lighter seal mark than Zn cause by increasing friction and found the friction increase because ZnNi layer of tube nut at thread area can easily be damaged at aluminum port without anodized surface.
As a result of the experimental study, tube nut surface treatment shouldn’t be selected ZnNi because most of modulator material are aluminum without anodized surface. If ZnNi should be applied for corrosion improvement and easier finger-start, it should be considered the torque increasing.
According to vehicle corrosion requirement is gradually severe and workers require easier finger-start for brake pipe installation, brake tube nut surface treatment is selecting ZnNi rather than Zn. If we control the same coefficient of friction spec for both, there is no difference for sealing performance in theoretical.
Even though Zn surface treatment is regarded better sealing performance than ZnNi empirically by sealing mark test result, there was no objective evidence of relationship between sealing mark and brake oil leak and it is very difficult to define with CAE analysis
So, we approached this issue as below
- Comparison brake pipe flare and tube nut
- Comparison leak test with brake pipe and tube nut each supplier
- Comparison leak test with different machining method to increase thread length
- Comparison leak test with pipe misalignment condition
- Comparison seal mark test according to tube nut friction of surface treatment
- Comparison seal mark test for tube nut surface treatment (ZnNi vs Zn)
From the experimental study, we verified what dominant factor is for brake pipe sealing. We checked the ZnNi surface treatment has lighter seal mark than Zn cause by increasing friction and found the friction increase because ZnNi layer of tube nut at thread area can easily be damaged at aluminum port without anodized surface.
As a result of the experimental study, tube nut surface treatment shouldn’t be selected ZnNi because most of modulator material are aluminum without anodized surface. If ZnNi should be applied for corrosion improvement and easier finger-start, it should be considered the torque increasing.
목차
Abstract
1. INTRODUCTION
2. BRAKE PIPE STRUCTURE
3. EXPERIMENTAL STUDY
4. CONCLUSION
References
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UCI(KEPA) : I410-ECN-0101-2014-550-002587302