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Defining the effect of sweep tillage tool cutting edge geometry on tillage forces using 3D discrete element modelling

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Information Processing in Agriculture 2015年第2期2卷 130-141页

作者： Mustafa Ucgul John M.Fielke Chris Saunders Barbara Hardy Institute School of EngineeringUniversity of South AustraliaMawson LakesSA 5095Australia

The energy required for tillage processes accounts for a significant proportion of total energy used in crop *** many tillage processes decreasing the draft and upward vertical forces is often desired for reduced fuel use and improved penetration,*** studies have proved that the discrete element modelling(DEM)can effectively be used to model the soil–tool *** his study,Fielke(1994)[1]examined the effect of the various tool cutting edge geometries,namely;cutting edge height,length of underside rub,angle of underside clearance,on draft and vertical *** this paper the experimental parameters of Fielke(1994)[1]were simulated using 3D discrete element modelling *** the simulations a hysteretic spring contact model integrated with a linear cohesion model that considers the plastic deformation behaviour of the soil hence provides better vertical force prediction was *** parameters were determined by comparing the experimental and simulation results of angle of repose and penetration *** results of the study showed that the simulation results of the soil-various tool cutting edge geometries agreed well with the experimental results of Fielke(1994)[1].The modelling was then used to simulate a further range of cutting edge geometries to better define the effect of sweep tool cutting edge geometry parameters on tillage *** extra simulations were able to show that by using a sharper cutting edge with zero vertical cutting edge height the draft and upward vertical force were further reduced indicating there is benefit from having a really sharp cutting *** extra simulations also confirmed that the interpolated trends for angle of underside clearance as suggested by Fielke(1994)[1]where correct with a linear reduction in draft and upward vertical force for angle of underside clearance between the ranges of-25 and-5°,and between-5 and 0°.The good correlations give confidence to recommend further invest

关键词： DEM cutting edge geometry

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edge preparation methods for cutting tools:a review

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Frontiers of Mechanical Engineering 2023年第4期18卷 49-77页

作者： Yu ZHOU Wei FANG Lanying SHAO Yanfei DAI Jiahuan WANG Xu WANG Julong YUAN Weigang GUO Binghai LYU College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310023China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology(Ministry of Education and Zhejiang Province) Zhejiang University of TechnologyHangzhou 310023China Special Equipment Institute Hangzhou Vocational&Technical CollegeHangzhou 310018China

edge preparation can remove cutting edge defects,such as burrs,chippings,and grinding marks,generated in the grinding process and improve the cutting performance and service life of *** edge preparation methods have been proposed for different tool matrix materials,geometries,and application *** study presents a scientific and systematic review of the development of tool edge preparation technology and provides ideas for its future ***,typical edge characterization methods,which associate the microgeometric characteristics of the cutting edge with cutting performance,are briefly ***,edge preparation methods for cutting tools,in which materials at the cutting edge area are removed to decrease defects and obtain a suitable microgeometry of the cutting edge for machining,are *** edge preparation methods are explored on the basis of existing processing technologies,and the principles,advantages,and limitations of these methods are systematically summarized and *** preparation methods are classified into two categories:mechanical processing methods and nontraditional processing *** methods are compared from the aspects of edge consistency,surface quality,efficiency,processing difficulty,machining cost,and general *** this manner,a more intuitive understanding of the characteristics can be ***,the future development direction of tool edge preparation technology is prospected.

关键词： edge preparation method preparation principle cutting edge geometry edge characterization tool performance

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