An Examination Of Fracture Splitting Parameters Of Crackable Connecting Rods

Year 2012, Volume: 16 Issue: 2, 113 - 122, 01.08.2012

Zafer Özdemir Ziya Aksoy Tekin Özdemir

Abstract

-

Keywords

connecting rod, fracture splitting parameters, metallographic examination, crackable C70 steel, brittle fracture

Kırılarak İki Parçaya Ayrılabilen Biyel Kollarının Ayrılma Parametreleri Üzerine Bir İnceleme

Abstract

Fracture splitting method is an innovative processing technique in the field of automobile engine connecting rod (con/rod) manufacturing. Compared with traditional method, this technique has remarkable advantages. Manufacturing procedures, equipment and tools investment can be decreased and energy consumption reduced remarkably. Furthermore, product quality and bearing capability can also be improved. It provides a high quality, high accuracy and low cost route for producing connecting rods (con/rods). With the many advantages mentioned above, this method has attracted manufacturers attention and has been utilized in many types of con/rod manufacturing. In this article, the method and the advantages it provides, such as materials, notches for fracture splitting, fracture splitting conditions and fracture splitting equipment are discussed in detail. The paper describes an analysis of examination of fracture splitting parameters and optik-SEM fractography of C70S6 crackable connectıng rod. Force and velocity parameters are investigated. That uniform impact force distrubition starting from the starting notch causes brittle and cleavage failure mode is obtained as a result. This induces to decrease the toughness.

Keywords

Biyel kolu, kırarak ayırma parametreleri, metalografik inceleme, kırılabilir C70 çeliği, gevrek kırılma

References

• Roman. Celin., Boris. Arzensek., Dimitrij. Kmetiç., A metallographic examination of a fractured connecting rod, Materials and Technology 42 2, 93–95, (2008)
• Z.Gu., S.Yang., S. Ku., Y. Zhao., X. Dai., Fracture splitting technology of automobile engine connecting rod, Int J Adv Manuf. Springer-Verlag London Limited, 25: 883–887, (2005)
• Yu.R., The fracture splitting process of connecting rods, Process Mater Autoob 9:9 – 11, (1998)
• Shi. X., Detach connecting rod by cracks expanding process method 7:3–4, (1995)
• Gu. Z., Connecting rod fracture splitting New Technol New Process 7:12–15, (2003)
• Fukuda. S., Eto. H., Development of fracture splitting connecting rod, JSAE Rev 23(1):101–104, (2002)
• Whittaker. D., The competitions for automotive connecting rod markets. Metal Powder Report 5:32– 36, (2001)
• Weber. M., Comparison of advanced procedures and economics for production of connecting rods, Powder Metall Int 26(3):125–128, (1993)
• Liming. Zheng., Shuqing. Kou., Shenhua. Yang., Lili. Li., Fei. Li., A study of process parameters during pulsed Nd:YAG laser notching of C70S6 fracture splitting connecting rods, Roll Forging Institute, College of Materials Science and Engineering, Jilin University, Renmin Street No. 5988, Changchun 130025, PR China (2009)
• Kou. S., Yang. S., Deng. C., et al. Fracture splitting process –the advanced method in manufacturing engine connecting rod, Chin Mech. Eng. 12(7):839– 841, (2001)
• Corus Engineering Steel 2003, FRACTIM, An improved machinable air cooled fracture splittable carbon steel for connecting rods
• Tsuyoshi. Kubota., Shinya. Ivrasaki., Tsuneo. Isobe., Toshikatsu., Koike., Development of fracture splitting method for case hardened connecting rods, Advanced Technology Research Div. Research & Development, Yamaha technical paper, (2007)
• Momose. Y., Ota. S., Yamamoto T., Method of and apparatus for cracking connecting rod, USA, (2005)
• Orrin. P.B., Connecting Rod Cracking Apparatus, USA, (2004)