The Design And Research Of The Cutter System Of Corn Stubble-smashing Machine

The technology of the corn stubble-smahing and the return makes sense in the "protectable farming". The cutters are important part in return machine. And cutter system is consists of not only parts but also the way they assemble. In this paper, a kind of the cutter system of corn stubble-smashing is designed, dynamicly simulated, equilibriumly similited, and analysed in free modal and in structure static.With the situation of the cutter in domestic is poor in cutting, high power consumption and short life span, The Archimedes spiral type cutter is desined. The cutter edge curve is composed by the "Archimedes spiral" and "L type curve", which enables the cutter to get into the soil gradually and the sliding cutting angle to change stablely, which meet the different stubble-smashing requrinetment of different depth and extends the life span.The cutter shaft and disk are designed and modals are built in Pro/E. T. The paper proposes three assembling schemes as "spiral type","reverse Ⅴ type" and "reverse W type". The cutter, shaft and disk are assembled respectively in Pro/E in three types above.Import each scheme as format "x-t" into dynamic simulation software ADAMS2010and offer reasonable restrain and drive. With the markers, the each scheme is simulated and the results are gotten. With the analysis between the results of each scheme, the "reverse W type" is determined as the best scheme.Eight orders free modal analysis of "reverse W type" in finite element analysis software ANSYS14.0Workbench and eight orders natural frequencies and vibration types are gotten, which departures the work frequency without the destroy of machine. The structural static analysis of the cutter shows the total deformation, von stress and shear flexible strain, which is tiny enough to satisfy working requirement. The design and research of the cutter system provide certain technical reference and theoretical support for the design of corn stubble-smashing machine.