| The motorcycle frame is mainly fittings by many kinds of the board and welding processing formation, it has the complex spatial structure. The frame not only supports, connects each spare part of the motorcycle, but also withstands the weight of the motorcycle and each kind of load in manned, carries things and the load of travel process impact. Therefore the frame must intensity, rigidity, toughness enough and meet the request of the safety performance in the motorcycle of load run (manned, carries thing) process. Frame's own weight must as light as possible. Therefore put forward the very high engineering factor and the request to the motorcycle frame welding processing quality.This article in view of the frame fracture accidents of ZS125-â…¡motorcycle In the motorcycle process of operation in recent years as well as the feedback information of frame fracture has carried on the analysis, according to the condition of motorcycle frame manufacture process technology and the safety requirements of motorcycle frame load run, proposed the design proposal on how to controls the frame does not rupture. To the ZS125-â…¡motorcycle frame has carried on the entity modeling and the finite strength analysis; Frame fracture surface appearance feature observation, crack germination, expansion and fracture forming process; and have tested welding stress and strain of the end weld crowded spot's of automotive frame assembly and the test result computation were analyzed; The examination of the steel chemical composition which is the frame used and the experiment of the weld ability; have analyzed processing technology of the frame produces. Deeper expounds on the main cause of automotive frame assembly dehiscence, crack extend rupture. Then puts forward some counter measures of optimization on the corresponding craft.Through the experiment test to frame welding residual stress and the welding deformation, technological measure is verified, controlling the frame welding residual stress and the welding deformation effectively, enhanced the whole intensity and rigidity of automotive frame assembly. Through motorcycle on the spot 6000 km and 16000 km kilometer strict state of roads examination indicated that, after improvements in process ,have enhancement frame's crack resistance, anti-knocking property and the unit motorcycle's security and reliability and durability in running , meet the national standards of motorcycle frame technique of manufacture. The achievements of this article and proposed the countermeasures on the production to improves the selection of the frame spare part quality, assembly, welding process measure, It has been used to Improved Design and field welding craft of the ZS125-â…¡Motorcycle frame spare part; Frame's manufacture quality had increase remarkably. In the recent a half year the feeds back of frame rupture phenomenon is greatly reduction, the frame rupture phenomenon reduces for about 25% of the original. |
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