Development And Experiment Of Automatic Binding Machine For Grapevine

Grape is an important part of fruit industry in China.In recent years,with the increasingly obvious aging trend of China’s population,insufficient labor population has become a key factor restricting the development of China’s grape industry.Shandong province,a large province of grape production in the north,as a case study,the level of mechanization of grape orchard management in the province is low.And the binding operation of grapevine is mainly manual binding,which is difficult to meet the needs of grapevine binding due to its high labor intensity,low efficiency and high labor cost.Therefore,the research and application of grapevine binding mechanical equipment is of great significance to improve the mechanization level and economic benefit of orchard.At present,there are many problems in grapevine binding technology in China,such as single binding method,high labor cost and low efficiency.To solve these problems,based on the agronomic requirements of grapevine binding,this paper takes grapevine as the research object,through mechanical properties test and virtual prototype technology,combined with computer numerical simulation and automatic control principle,according to the overall scheme of grapevine automatic binding machine,the rope winding device,rope twisting device,multi-functional mechanical switch and circuit control system of automatic vine twig binding machine were designed.The main research contents and conclusions of this paper are as follows:（1）Vineyard binding operations as an example,the mechanical properties of grapevine were studied by radial compression and bending tests.When the grapevine met the requirements of binding agronomy,its overall water content was 71.45%,the bending strength was 0.14 MPa minimum and 0.35 MPa maximum.The minimum compressive strength is 0.14 mpa and the maximum is 0.42 mpa.（2）Based on the agronomic requirements of grapevine binding operation,determine the overall program of grapevine automatic binding machine,using Solid Works THREEDIMENSIONAL design software to optimize the different structures of grapevine automatic binding machine,mainly including rope winding device,rope twisting device and multifunctional mechanical switch.The size of the machine is 380 mm×260 mm×80 mm（length ×width × height）,and the maximum binding diameter is 40 mm.At the same time,ADAMS software is used to carry out kinematics and dynamics simulation analysis of the rope winding mechanism,the simulation results show that the gear meshing and running continuity of the rope winding mechanism is good.The kinematics and dynamics analysis of the virtual prototype of the rope winding mechanism are reliable.（3）The circuit control system of the vine automatic binding machine is mainly controlled by MITSUBISHI FX1N-6MR PLC,and the control system of the vine automatic binding machine is designed.By manually pressing the multi-functional mechanical switch,the rope winding action is completed.By changing the positive and negative polarity of the power supply line,the switch of the positive and negative rotation of the motor is realized,and the motor is triggered by the limit sensor to reverse,and the rope twisting action is carried out by the ratchet wheel to drive the rope twisting mechanism.GX Works2 software was used to simulate and analyze the circuit control system,and the feasibility of the circuit control system was verified.（4）Vineyard field test results show that the binding efficiency of the binding machine is about 4-6 times that of manual binding.The binding quality can ensure that the binding sticks are tight and not easy to slide without damaging the vines.In the work of binding,the failure rate of the machine is only 1.4%.Binding machine can reduce labor cost,improve the mechanization and automation level of grape production management.