Development On The Device Of Seeding Tray For Vertical And Automatic Fetching And Placing

Facility Horticulture Technology is a modern and efficient agricultural production method, the factorial plant is an advanced form of cultivation of horticulture. With the development of industrialization breeding techniques, automatic grafting machine, nursery boxes, automatic seeding system, and environment control system were widely used in automated machinery factory cultivation. However, among these agricultural machinery, seedling tray transportation was mainly relied on manual work.it is not only characterized with insufficient mechanization, but also with low efficiency and high cost. Achieving automatic handling seedling tray become an urgent problem and automatic picking and placing seedling tray equipments turn out to be a key technology.This paper presents a vertical unit that can pick and place seedling tray automatically. The processes mainly contained identifying research programs, designing component parameters, using Pro / E software for its 3D modeling, virtual assembling and motion simulation analysis. And then compiled control procedures, trial-manufactured device prototype and developed experimental study. The main contents and conclusions are as follows:(1)According to the requirements, automatic picking and placing seedling tray device program were established. Comparing various programs and considering the increasing layers of seedling nursery box, the device was designed of three parts: picking and placing equipment, lifting equipment and placing agencies. Picking and placing device uses a chain driving crawl finger to load and unload seedling tray. Lifting device uses a chain drive to transport picking and placing unit to each layer.(2)According to the overall program, the parameters of key components were calculated. Using three-dimensional design software Pro / E to establish three-dimensional modeling of seedling tray handling system. The whole virtual assembling and motion simulation analysis are completed so as to verify the reasonableness of device design.(3)Designing the control system of the device. According to the process of automatic loading and unloading seedling tray, design the system structure of the device control system. Using the SCM as the control unit, select proper stepper motor drive systems and sensor and then connect each part able to work. the control system use C language program and achieve site commissioning.(4)Completing assembly and testing equipment. Purchased the standard parts of the program and manufactured non-standard parts. The size of the device is 1597mm×1330mm×472mm, and the distance between frames that in placement mechanism is 300 mm. The automatic picking and placing devices were assembled and the testing of automatic picking and placing seedling tray was fulfilled, testing the function of the equipment unit to transport seedling tray automatically. While handling a seedling tray, the optimal level distance of seedling tray between the devices was 25 mm and 38 seconds were used to complete loading and unloading process a time utilizing picking and placing mechanism. It is required 207 seconds to filled with three layers of seedling using this device.