Journal of Engineering Research

As the motorcycle industry advances, the precision and efficiency of engine crankshaft machining directly impact the overall performance of the vehicle. This paper discusses the challenges in machining motorcycle engine crankshafts, particularly those arising from material properties and complex structures. It outlines the optimization of machining processes, which include forging, rough machining, semi-finishing, and finishing. Additionally, it details the development process of special jigs, including the selection of positioning references, the design of clamping schemes, and structural optimization. By improving both the machining process and jigs in tandem, the paper aims to effectively enhance the precision and production efficiency of crankshaft machining, meeting the demands for high precision, high efficiency, and low cost. This provides a technical reference for the manufacturing of motorcycle engine crankshafts.

Motorcycle engine; Crankshaft machining; Process optimization; Special jigs; Jig design