Development of machining processes and special jigs for motorcycle engine crankshafts
摩托车发动机连杆加工工艺及专用夹具开发

摘要

随着摩托车行业的发展，发动机连杆加工精度与效率直接影响整车性能。阐述摩托车发动机连杆加工工艺难点，针对材料特性、复杂结构导致的加工难题，优化加工工艺，涵盖锻造、粗加工、半精加工及精加工等环节。同时介绍专用夹具开发过程，包括定位基准选择、夹紧方案设计、结构优化等内容。通过工艺与夹具协同改进，有效提升连杆加工精度与生产效率，满足高精度、高效率、低成本的制造需求，为摩托车发动机连杆制造提供技术参考。

Abstract

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.