The Copying Rotary Tillage Blade Optimization Design And Experimental Research

Rotary tillage is one of the key technologies in the development of agricultural mechanization.The effect,efficiency and energy consumption of rotary tillage directly determine the application and popularization of agricultural machinery and technology in china.In the vast northern areas of China,especially in the plain area,a large number of rotary tillage machine tools or combined working machines with rotary tillage operation are needed.Aiming at the problems of high energy consumption and poor operating efficiency of the commonly used rotary tiller in our country,the paper further develops a tool with less energy consumption and better working effect.This has important significance for popularization of agricultural economy and the significance for the development of the rotary tillage machine,this paper mainly from the angle of bionics using modern bionic technology for ordinary rotary scimitar structure modification,design and optimization.The excellent performance of the soil excavation and the cutting characteristics of the crab foot become the model of the structural design of the copying rotary blade.Through the observation,it is found that the foot of the river crab is mainly through the action of the sawtooth on the action and the sawtooth interaction on the static clamp to meet the needs of the soil excavation and cutting.Operation mechanism of the rotary blade profile is different with the traditional rotary cutting tool,mainly through the soil cutting,grinding to achieve the effect of plowing and rotary cutting tools can reduce the compaction of the soil,reduce the tool wear,prolong the service life of the cutter,creating a good environment to the seeds for growth and development.In this paper,through the extraction of the contour curve of the main tooth profile of the crab claw foot operating forceps and the optimization of its structure,the curve which is most suitable for the processing of the rotary blade is processed.Tooth profile equation y=(0.03766/(0.11282*sqrt)(PI/2))*exp(-2*((x+0.07006)/0.11282)^2).Based on the SolidWorks platform,the simulation model of Profile rotary cutter is established,and the assembly of rotary cutter and cutter roller is realized in the virtual environment.With the help of the powerful static analysis function of ANSYS,the stress and deformation of the three different working surfaces of the blade and the blade of the rotary cutter are compared.In the process of analysis,we found that: no matter what kind of mechanical state of the tool shank is the most concentrated stress,the maximum deformation of the tool always occurs at the end of the tool.When the cutting tool is in the cutting condition of the side cutting edge,the maximum stress ratio of the rotary cutter is reduced by 30.6% and the deformation is reduced by about 11.8%.When the cutter is in the cutting state,the maximum stress ratio of the rotary cutter is reduced by 19% and the deformation is reduced by about 28.3%.When the cutter is in the tangential cutting state,the maximum stress ratio of the rotary cutter is reduced by 15.9% and the deformation is reduced by about 34.8%.The design of the profile rotary cutter makes the stress and deformation in the process of the work well improved,thus improving the structural stability and service life of the cutter.Based on the definition of the material of the soil model,the paper analyzes the operation situation of the copying rotary cutter and the prototype rotary cutter in the deepest place.The results showed that the maximum stress of soil was reduced by 98% and the soil deformation was almost 0.The contrast experiment of the field effect of the rotary cutter and the prototype rotary cutter.The results show that compared with the original profile rotary blade rotary blade operating in soil increased by 2.6% in soil breaking rate increased by 2.3%,in after tillage vegetation coverage increased by 2.4% in the soil after tillage roughness increased by 26.7%,from the work on indicators for industry effect of rotary blade profile the better.In this paper,the comparison of the performance of the rotary cutter and the prototype rotary cutter is carried out.The experimental results show that the wear quality of the cutter is reduced by 29.8% compared with that of the original rotary cutter.In conclusion,the design and development of the profiling rotary cutter has a good research and practical value for reducing energy consumption and improving the operation effect.