A Study On Rice Seedling Transplanter By Virtual Prototype Technology

The row orderly transplanting technology can plant rice seedlings lowly without re-green period, which can increase the output of rice greatly. This technology can avoid many disadvantages brought by rice seedling cast technology. Rice seedling cast technology transplants rice seedlings disorderly and unevenly which makes the later work difficult to do, and is unfit for working in small fields. So, it has a bright future for the row orderly transplanting technology to spread and apply 2ZB-8 mini-type rice seedling transplanter is a mini-type seedling row -transplanted machine fitting for the hill area. But in practical application, the quantities of transplanted seedlings of each row are different and the seedlings are uneven in the same row, also there are some other problems with this machine. So, it is necessary to make a virtual study on it's core component-ordinal casting mechanism, to improve the working performance of the whole machine.In this dissertation, rice seedlings of three different kinds of soils were measured for their main characteristic parameters. Main parameters that affect the working performance of the ordinal casting mechanism were analyzed. A parameterized virtual prototype model of the ordinal casting mechanism was built and validated by comparing physical experiments results and virtual experiments ones. Through interacted virtual experiments, the structure ofordinal casting mechanism was optimized. Optimizing results indicate that:1) When the row separating board's horizontal inclination is 45 degree and the contained angle is 90 degree, the working performance of the row separating board is much better.2) The rice seedling feeding bim can meet the feeding need of the rice seedling better, when the entrance width of the rice seedling feeding bim is 80mm and the horizontal inclination of the inclined board is 45 degree.3) Adjusting the installation site of the front springs on the vibratory seedling feeding plate of the existing machine from 35mm to 85mm, and the thickness of the V form slots from 0.5mm to 0.65mm, can make the horizontal and vertical variation coefficient of the vibration consistency of the vibratory seedling feeding plate reduced by 61.04% and 39.85% respectively, thus can improve the seedlings consistency and homogeneity of the rice seedling transplanter.