Design And Experiment Of Key Components For Corn Paper-pot Seedling Transplanter

Maize seedling transplanting can greatly increase the multiple crop indexes and extend thegrowing season which could bring notable economic benefit by higher yields. The agronomictechnology of corn pot seedling transplanting is in pilot extension phase in Heilongjiang Province.The agronomic technology of corn pot seedling was usually carried out by manual transplanting.The uniformity of transplanting is worse,the survival rate is low and labor is intensive which areits shortcomings. To achieve the scale of the maize transplanting, corn pot seedling transplantingmust be away from onerous physical labor, then it can be widely used in the production. Accordingto the relatively mature agronomic technology of the corn paper-pot seedling transplanting fromNehe City of Heilongjiang Province, as spring drought is serious in the northern regions, corn potseedling transplanting is needed match with waterwheels. Learning from the working principle offlexible disc transplanter and combining agricultural machinery and agronomy, one kind of cornpaper-pot seedling transplanting machine has been developed.Aiming at the existing problems about seedling feeding mechanism in traditional flexible disctransplanter, such as conveyer belt is easy to skid, corn pot seedling placement is highly requiredwhich makes the operators fatigue easily and so on, the seedling feeding mechanism working inchain drive transmission way has been designed.The type of flexible planting disk mechanism was designed. The movement state of potseedling in disc was simulated and analysed by ADAMS software. It concluded that when pointtrajectory on the edge of the disc forming a smaller trochoidal, near the lowest location to releasepot seedling was the best choice. The material of high density polyethylene plate were adopted inplace of the rubber for flexible disc by bench test. The structure of the flexible disc was optimizedby the ANSYS finite element analysis software to elongate the working life of flexible disc.In order to ensure qualification rate of upright degree, through theoretical analysis and fieldexperiment, covering blade and covering soil wheel were developed. Aiming at soil congestion,one water carriage hiller which works by water jets hitting the soil directly to fixed pot seedlingwas developed. The field experiments results indicated that the way of working was viable. Withthe virtual prototype technology, a three-dimensional model of the key components of transplanterwas established by the CATIA software raising the work efficiency.The main working parameters of transplanting monomer were studied by means of singlefactor and multiple factors test in soil tank test-bed. A center composite rotatable orthogonal experimental design of response surface methodology was employed to find optimal combinationof working parameters of transplanting monomer. Coefficient of variation of row spacing andqualification rate of upright degree were selected as response. Three factors included location offurrow opener, the depth into the soil of furrow opener and covering blade included angle wereselected as input variables with five levels respectively. The results indicated that under conditionof an optimum combination that the rotated speed of planting disk being4.8r/min, the bottom ofcovering blade away from the center of planting disk being30cm, the clamping angle of corn potseedling being87~90, the location of furrow opener being50mm, covering blade included anglebeing36~40°, the depth into the soil of furrow opener beeing102~118mm. It provided thereliability and reference for the design of key components of transplanting monomer and theadjustment of main working parameters in the field.Experiments in the field were carried out at several fields in heilongjiang province. Theresults showed that the structure of the corn paper-pot seedling transplanter was well-designed andthe transmission system of the corn paper-pot seedling transplanter was stable and reliable. It issuitable to work in good soil conditions. The results can provide reference for the following studyto further improvement of the design.