Design And Expperimental Study On Key Components Of Corn Detasseling Machine

The largest influence on the quality of seed corn is the corn detasseling process.At the same time,for commercial grain cultivation,corn detasselingl can increase yield effectively.At present,corn detasseling depends on manual in China.There are some problems,such as low efficiency,high labor cost and poor working environment.Therefore,the study of mechanization technology suitable for corn detasseling in China can effectively improve the efficiency of mechanical detasseling,reduce labor costs and improve the mechanization level of corn detasseling.Corn Xianyu 335 planted in Northeast China is the research object in this paper.The design of key components for corn detasseling is carried out,and the following aspects are studied.1?Based on the research on the characteristics of ear pulling force of corn plant in the detasseling stage,combined with experimental and theoretical analysis,it was concluded that the ear length of Xianyu 335 corn plant ranged from 5 cm to 10 cm,and that the maximum pulling force at the non-pollination stage was 56.5N,which was proportional to the maximum cross-sectional area of 31.2mm2,and the pulling force was proportional to the cross-sectional area.2?Designing the key components of corn detasseling.Four-bar profiling mechanism was designed and kinematics analysis was carried out to determine the height range of the four-bar profiling mechanism.Through the establishment of three-dimensional model of male-pumping device,the frame,hydraulic motor,male-pumping disc and hydraulic oil circuit of male-pumping device were designed and analyzed,and the driving axle of male-pumping device was checked and designed.Through LS-PREPOST and LS-DYNA,the joint simulation of corn tassel entering into tassel-pumping disc was carried out.The three-dimensional model of the tassel cutting device is established,the hydraulic motor is selected,the divider,the rotating axis and the rotary cutter disc are designed,and the static analysis of the rotating axis of the male-cutting device is carried out by SolidWorks Simulation.3?A prototype is manufactured,and the tassel-pulling device is tested by orthogonal test to verify the effect of tassel-pulling operation.Orthogonal experiments were carried out on the tassel-pulling device by choosing the form of tapered rubber hanging on the tassel-pulling disc,the rotational speed of the tassel-pulling disc,the working speed and the relative position of the male-pulling disc as the influencing factors,and taking the tassel-pulling rate and the loss rate of the blade as the evaluation indexes.Through orthogonal test and single factor test,it is concluded that the best combination is the conical surface of male extracting disc with block shape gum,the rotational speed of male extracting disc with 800 r/min,the operating speed with 3 km/h and the relative position with 35 cm.At this time,the corn detasseling rate is the highest and the leaf loss rate is the smallest.Field experiments on the tassel-cutting device showed that the male-cutting rate of the device was 91%,which met the agricultural requirements of mechanized detassel-cutting effect.