Design And Simulation Analysis On Copying Header Of Sugarcane Harvester Cutter In Ridge-forrow Planting

Sugar cane is one of the main raw materials for the sugar industry in China.According to relevant statistics,in 2015,the planting area of sugar cane in China reached 24 million mu,and the planting area in Yunnan Province was 5.3 million mu.Until now,the planting area and output of sugarcane of Yunnan is preceded only by Guangxi,and the province of Yunnan is the second largest place of sugar production in China.The sugarcane planting area of Yunnan has complex terrain.In Yunnan,sugarcane is mostly planted in mountainous and hilly areas,and it is prone to drought.In order to achieve the water saving and drought resistance in the planting of sugarcane,sugarcane mostly adopts a planting pattern based on “Groove planting”.The sugarcane planted on the soil of the ridge and furrow groove can effectively achieve water and fertilizer conservation,especially in mountainous areas and slopes.Groove planting is a kind of technology for water-saving and drought-reducing sugarcane in dry land,but it brings great difficulties to mechanized harvesting of sugarcane.At present,the existing harvester has poor profiling performance,and the blade cannot cut into the root of the sugar cane.These defects result in a loss of production and a high breakage rate,force the manpower to perform “removal” again and restrict the mechanization of the sugarcane harvest.Therefore,it is of great practical significance to design a sugarcane harvesting profiling harvester for adapting to a furrow plantation to increase the degree of sugarcane mechanical harvest,reduce the harvest loss of sugarcane,and reduce the labor intensity of sugarcane farmers.Based on the analysis of the domestic and foreign research status of sugarcane harvesters,this paper took the physical characteristics test of sugarcane.Under the basis of agronomic requirements for the cultivation of sugarcane in ridge and furrow,I designed a contoured harvester adapting to the cultivation of sugarcane furrows,and used ADAMS software to profile the organization optimized the design and used the ANSYS/LS_Dyna finite element software to simulate and analyzed the cutter of the header.According to the results of the simulation analysis,the optimal working parameters of the cutter were determined.The specific research content is as follows:(1)After the text of physical properties of sugarcane root,the average quality,density,water content,sugarcane model calibration parameters,axial and radial shear modulus,axial and radial maximum shear strength,axial strength.,radial elastic modulus,axial and radial maximum tensile/compressive strength and other basic physical property parameters of sugarcane were obtained.All of these provide a theoretical basis for the overall design of a sugarcane cutting machine suitable for furrow planting.(2)According to the agronomic requirements of sugarcane furrow planting and physical parameters of sugarcane,the overall structure of the sugarcane cutlery was designed.Focusing on the theoretical calculation of the rotary speed of the cutting head cutter,the number of blades,and the working width of the disc cutter,the motion equation of the disc cutter was established.The missing cutting conditions of the cutter were analyzed,and the overall transmission of the header and power unit was designed.(3)According to the length range of the profiling rod theoretically calculated by the four-bar profiling mechanism,the ADAMS software was used to simplify the model,the four articulation point coordinates of the four-bar linkage were set,and the design variables were established for the coordinates.The optimization module was used in ADAMS.The four-bar linkage optimized the optimal length of the profile bar.(4)In order to analyze the influence of cutter head rotation speed,cutter head tilt angle,and the forward speed of the machine on the cutting performance of the header,a finite element simulation analysis was performed on the cutter.Using ANSYS/LS_Dyna software,a single factor test of the operating parameters determined the range of three operating parameters.Using ANSYS/LS_Dyna and DesignExpert.V8.0.6.1 software,a central combinatorial test was conducted on the cutting performance of the cutter.The three factors performed variance analysis and regression analysis on the maximum cutting force and energy consumption of the cutting index.Response curve analysis method was used to analyze the influence of two factors on the test index.The parameters of the test were optimized.When the forward speed of the machine was 0.45m/s,the cutter inclination angle of the cutterhead was 14°~23°,and the maximum cutter speed was 630r/min~670r/min.The force was lower than 686.15 N and the maximum cutting energy consumption was lower than 0.76 J.