Study on Machining of Cracking Notches for Automotive Connecting Rod Using WEDM

Abstract:

In order to resolve the problem of connecting rod notches machining, a new process of WEDM (Wire Electric Discharge Machine) has been presented, and it is greatly possible that expensive laser process can be replaced by WEDM in virtue of its unique advantages. Firstly, process parameters of notch have been analyzed, and project of machining notch using WEDM has been introduced, including measures to achieve good-quality notch. The relationship between cutting speed and power supply parameters has been investigated, and it is discovered that micro-crackle on bottom of notch are greatly effect to fracture splitting process, also new idea of active controlling micro-crackle has been presented. Finally, fracture splitting machining has been carried out. The cost and entrance standard of fracture splitting process are greatly dropped owing to new breakthrough of machining notch using WEDM.

• Periodical: Key Engineering Materials (Volumes 447-448)
• Pages: 228-232
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.447-448.228
• Online since: September 2010
• Authors: Yong Jun Tang, Yuan Bo Li, Yong Jun Zhang, Chun Qiang Zhou
• Keywords: Connecting Rod, Cracking Notch, Fracture Splitting Process, WEDM

References

[1] Q. Wang, F. He. A Review of Developments in the Forging of Connecting Rods in China[J]. Journal of Materials Processing Technology, 2004, V151: 192-195.

DOI: 10.1016/j.jmatprotec.2004.04.038

[2] S. Fukuda, H. Eto. Development of Fracture Splitting Connecting Rod[J]. JSAE Review, 2002, 23(1): 101-104.

DOI: 10.1016/s0389-4304(01)00154-0

[3] Yang S H, Kou S Q, Gu Z W, et al. Fracture splitting processing of engine connecting rod [J]. Journal of Harbin Institute of Technology, 2000, 32(3): 129-132.

[4] Park H, Ko Y S, Jung S C, et al. Development of fracture split steel connecting rods[C]. SAE Technical Paper, 2003011309, (2003).

DOI: 10.4271/2003-01-1309

[5] KOGANEMARU Satoshi，OUMI Ryuji．Development of fracture sphtting connecting rod with high yield ratio [J]．JSAE Annual Congress，2006, 20(6): 7-10.

[6] Zhang Zhi-qiang, Zheng Qi-feng, Zhao Yong, et al. Influence of Starting Notch Processing Methods on Fracture Splitting Quality of Connecting Rod [J]. Chinese Internal Combustion Engine Engineering, 2008, 29(5): 81-84 a)notches machined b)splitting process c)complete splitting rod Fig. 10 Experiment of fracture splitting process.