Research On Assembly Precision Of Gearbox Shafting Assembly Based On Dynamic Dimensional Chain

This paper presents a research on key technique for gearbox assembly by using dynamic dimensional chain (DDC). Classical theory of assembly dimensional chain (DC) researches assembly method only from the view of static dimension chain. In this paper the view of DDC is put forward and makes a development for existed principle on assembly DC.Firstly, the paper introduces the principles of classical DC and indicates the importance of studying DC to improve assembly accuracy and optimize assembly process. It's the usual methods of calculating the assembly DC.Secondly, in this paper the method DDC of analyzing the assembly DC is puts forward. It elaborates principles of DDC then provides a formula of the DDC. By studying the common formula it analyzed some factors affecting dynamic assembly DC and it is guidance for optimizing assembly process. The emphasis in this paper is the application of dynamic assembly DC in process of gearbox assembly. Shafting assembly is the core of main reducer assembly and its assembly accuracy affects the performance of the quality of gearbox assembly . The paper states main factors affecting the accuracy of gearbox assembly by analyzing DDC in process of driving pinion assembly. Through analyzing and calculating it concludes the relations between assembly close loop and the main affecting factors.Lastly, the paper introduces key equipments designed to ensure the quality of gearbox Shafting assembly. Concluding the analysis of dynamic DC, it also puts forward a design's method about the fuzzy control of driving pinion assembly and a research direction of improving the accuracy of the gearbox assembly.