Design And Study On Embedded Film Machine Furrowing Cutter

As an important management technique in modern agriculture,plastic film mulching cultivation technique plays an important role in cultivation and production of crops because holds soil moisture and temperature,improves soil physical and chemical properties,and improves soil nutrient content.However,in the hilly and mountainous areas in southwest China,a considerable part of plastic mulching is extended into furrows and covered with numerous soil to ensure the impermeability of plastic mulching,which increases the difficulty of picking up and recycling plastic mulching in the later badly.This paper studied the portable film embedding machine furrow opener,meeting the requirements of film embedding operation after ridging in tobacco field in the hilly and mountainous areas of southwest China and solving the above problem.The main contents are as follows:Based on the investigation results of current ridging and mulching operations in hilly and mountainous areas,and adhering to the principle of combining agricultural machinery and agronomy,this paper puts forward that the furrowing and mulching machine adopts horizontal furrowing mode to complete furrowing,embedding and filling at one time in the furrows on both sides close to the ridge body.It puts forward the embedded trenching depth of the film machine for 50 mm,furrow width at 15 mm and other related design parameters by preliminary field trials in Guizhou tobacco zone,and the portable machine carries on the preliminary design of an embedded film machine.This furrower divides into three kinds of furrowing cutter according to different cutter angles,and are driven by a motor.In order to reduce power consumption and improve the machine efficiency,both kinematics and dynamics models of soil particles with the action of cutting tools of the machine were established by mathematical calculation and theoretical analysis.The numerical simulation and analysis of soil cutting process were carried out using both ANSYS LS-DYNA and LS-PrePost software.The tool I cutter is determined to be the groove cutter of this film embedding machine by comprehensive comparison,and the results show that cutter I cutting soil average power consumption is 20.0 W with the condition of tool rotation speed is 150 r/min,forward speed is 1.25 km/h,and trenching depth is 50 mm.Soil cutting experiment was carried out with motor driving cutter I.When the environment of soil moisture content is 21.8%,the average power consumption of cutter cutting soil is 20.8 W,and the results of numerical simulation of the relative error is 4%.Single factor test and response surface experiment were carried out with tool speed,forward speed and trenching depth selected as test factors,which impact power consumption of cutting soil.The virtual experiment study on the response surface test was carried out,and the regression equation between power consumption of the cutter cutting soil and test factors,such as tool rotation speed,forward speed and the depth,was established with ANSYS LS-DYNA.The Optimum mathematical model of the regression equation was optimized by using the Optimum software in Design-Expert software.The result shows that when the tool speed is 130 r/min,forward speed is 1.5 km/h,and depth is 50 mm,the Optimum operating condition of the furrowing is optimal,with an average power of 22.9 W.The virtual verification on the optimized operation condition parameters of the cutting tool was conducted by ANSYS LS-DYNA software.The result shows that the average power of the optimized cutting tool is 23.9w,and the relative error with the optimized result is 4.37%,respectively.The power consumption measurement platform of the trencher was used to test the operation parameters of the optimized cutter.The result shows that the average power of the optimized cutter in cutting soil is 24.6w,and the relative error with the optimized results is 7.35%,respectively.