Experimental Research And Optimization Design Of Fruit Trees Seedling Strapping Machine

As the global fruit cultivation country, the planting regions of fruit tree in China is widely, and has a long history, and is rich in resources. Recent years, under the driven of rapid development of fruit tree planting industry, the training work of fruit tree seedlings has obtained the unprecedented development. Along with the growing of our country fruit plant area, orchard planting scale and management level is increasing, the normalized propagation has become the development direction of fruit tree seedlings now. In the operation process of production, the package and transport work of finished fruit tree seedling after unearthed is also extremely important procedure. During the link of nursery progress of seedlings, the seedling strapping machine to replace artificial work, not only can save a lot of labor, reduce labor intensity, improve work efficiency, reduce the cost of production but also binding quality than artificial binding work. In order to ensure quality, maintain work stability, improve work efficiency require seedling strapping machine with more stable operating performance. This experimental study and optimization design for the second generation of fruit trees seedling strapping machine which researched by our Research Group with independent research and development. Through the experimental we find out possible problems and optimized of it, in order to improve the operating performance of fruit trees seedling strapping machine.The main work of this text completed includes:1. Referring to the national standard GB/T 26960-2011 of the work quality experiment method and standard of semi-automatic strapping machine and combining the relevant horticultural requirements, developed the operating performance experimental scheme of seedling strapping machine. It includes of bundle of power and strapping tightness experiment, heat-seal strength experiment, strapping time experiment, nursery actual production experiment. Through experiments, inspect the adaptability of strapping machine in the nursery environment, the control range of bundle of power, the adjust range of heat-seal temperature, the work stability and work quality of strapping machine. It completes reasonable matching of the key strapping parameters, and finds the problems during the actual working process.2. The bundle of power and strapping tightness experiment and heat-seal strength experiment of seedling strapping machine is mainly aimed at the two main technological parameter of bundle of power and heat-seal temperature during the strapping process. Through the analysis of experimental data, it find the change rule and internal relation between bundle of power and heat-seal temperature, and ensure the best value range according to the horticultural requirements.3. Aim at the problem of hot-plate stuck strapping in the production experiment, it embarks from the movement rule and principle, and combine the characteristic of strapping object, analysis the reason of stuck strapping. And it put forward the solution aim at the itself structure of hot-plate, the problem is solved.4. It has carried out the contact simulation experimental analysis for the problem of movement losing efficacy of ejector-rob mechanical linkage in the course of production experiment by AIP 3D modeling software and ANSYS Workbench finite element simulation software. Through the observe and analysis of simulation result, the primary cause of mechanism losing efficacy is too large contact stress of the roller retaining bolt and roller pad during the circular motion of ejector-rob and cam mechanism, and it causes fatigue failure. It put forward the solution aim at this problem, and optimize the weak link of strapping machine.5. Through statistics and analysis of the experimental data of strapping time experiment, it obtains that average time of the seedling strapping machine for strapping a tape is 3.5s under the circumstance of no artificial participation. Finding the unstable factor of send tape weak and intermittent in the cause of strapping work, combine the production experiment, through in-depth theoretical analysis for the balance extension swing angle of feeding belt device, it finds the fundamental cause of the problem, and optimize the strapping parameters further.