With the improvement of the performance of the car engine, the requirement of connecting rod precision is higher and higher, which will directly affect the quality of the connecting rod, and affect the overall performance of the connecting rod. Connecting rod cracking process is one of the latest research and development in the world. It is a typical lean manufacturing process in the development of high efficiency and low cost. At present, the United States, Germany and other countries have more than 60 kinds of engines using the cracked connecting rod, the use of cracked connecting rod has become the international advanced automotive engine manufacturers of the preferred process.
In recent years, the country has begun to connecting rod fracture splitting technology experiment research, car even roll forging Xuan company and the Jilin University research, No.2 process of jointly developed application of connecting rod fracture splitting technology Guangzhou Dragon releaser and achieved remarkable results. Application of cracking technology will greatly improve the technological content of connecting rod manufacturing, optimize connecting rod machining process, achieve the purpose to improve the quality and reduce production cost. The application of cracking technology is as follows: 1. To simplify the design requirements of connecting rod, cover and connecting rod bolts, and reduce machining order of 30% machines. Improving the deformation of connecting rod hole. To improve the axial position of connecting rod. The reduction of connecting rod production equipment investment decreased 25%, the plant covers an area of 30%. The wide range of indications, the size of the engine connecting rod can be used this method of processing. Without the need for conventional heat treatment after forging the cracking connecting rod can reduce, electricity, energy saving. August 5, 2006, Guangzhou long song car company, the company completed the cracking technology in the 10BF5 engine connecting rod manufacturing in Guangzhou, China, the company's technology and Technology Department of the office of the technical office of the company's technical achievements appraisal, expert agreement that the application technology to fill the gaps, to reach the international advanced level.