Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study on Development of Pre-heat Treated Steel Head Bolt for Swashplate Type Compressor of Car Air-conditioner

차량용 에어컨 압축기의 선조질강 헤드 볼트 개발에 대한 연구

  • 김영신 (한온시스템 선행원가혁신팀) ;
  • 김호겸 (성원산업 영업개발부) ;
  • 황승용 (한온시스템 기계식COMP팀) ;
  • 김영만 (성원산업 영업개발부)
  • Received : 2016.05.09
  • Accepted : 2016.07.19
  • Published : 2016.09.01
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Abstract

This paper is a study on head bolts that are used in A/C compressors to reduce production cost and solve leak problems on the head bolt seat area that causes massive intermittent malfunctioning during production. In this study, the pre-heat treated steel, which was used as a material in the head bolt, eliminated the heat treatment process after forging. The pre-heat treated steel head bolts, which have 10 % lower tensile strength than the conventional SCM 435 head bolts, were selected after considering the results of creeping rupture properties, axial force, and stress concentration per tensile strength variation. Then, the performance test and the durability test with the A/C compressor that was assembled with the pre-heat treated steel head bolts were performed and verified. Based on the results, the pre-heat treated steel head bolts developed in this study saved 7.3 % in production cost by eliminating the heat treatment process and the logistics process. Furthermore, the leak problem on the head bolt seat area in the A/C compressor was addressed significantly on the mass production assembly line.

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References

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