Research On Innovative Design And Application Of Mulberry Branch Cutting And Baling Machinery

Mulberry cutting is an important part of mulberry garden management.However,due to the lack of corresponding technology and equipment,for many years the domestic has almost always been cutting with mulberry scissors by hand.The cutting of mulberry branches is not only related to the yield of mulberry leaves and the disease resistance and insect resistance of mulberry trees,but also to the comprehensive utilization of mulberry branches.The lack of machinery and equipment severely limits the development of the silkworm industry in China and the extension of the silkworm industry chain.Based on the above situation,there is an urgent need to develop a mulberry branch cutting machine that combines cutting and bundling.The mulberry branch cutting machine uses reciprocating cutters to cut the mulberry branch.Use toggle wheel mechanisms to collect mulberry branches,and finally uses a knotter to bundle the mulberry branches.This paper mainly focuses on the key technologies of mulberry branch shearing and mulberry branch bundling machines.The specific contents are as follows.In order to obtain the best working parameters to prolong the service life of the cutting tools of the cutting and baling machine,the UG software and ANSYS/LS-DYNA software were used to perform explicit dynamic numerical simulation analysis on the process of cutting mulberry branches by reciprocating tools.First,by studying the mechanical properties of mulberry branches,the finite element models of the cutters and mulberry branches were established,and the rationality of the model is verified.Then,using the stress generated by the cutter during the cutting of mulberry branches as the test index,the cutting edge angle of the moving bladeβ,the cutting surface angle of the fixed bladeγ,the cutting speed V_J and feed speed V_G were used as experimental research factors,and a virtual orthogonal experiment is designed and carried out.It is found that the influence degree of the above factors on the experimental results is:β>V_J>γ>V_G.The optimal parameters are:β=28°,γ=50°,V_J=1400 mm/s,V_G=602.78 mm/s.It can ensure the stress generated by the tool during the working process can be minimized,so as to extend the service life of the tool.Finally,a test bed was built for cutting mulberry branches,and a real shear test was carried out under the best matching parameters,so as to verify the simulation results.In order to solve the problems of difficulty and high cost in designing and manufacturing traditional C-type knotter and D-type knotter,a new type of knotter is designed——K-type knotter.A new method of knotting the rope is proposed.According to the knotting method,the motion cycle diagram of the knotter is matched,and the mechanical structure of the knotter is designed.Based on virtual prototype technology and finite element simulation analysis technology,using ADAMS software and ANSYS/Workbench software,the kinematics analysis of each key mechanism of the knotter was performed,the static analysis of the movable clamp of the knotting nozzle was performed,and modal analysis was performed on the rope feeding rod.It was found that each mechanism and part can meet the requirements for use.Then,a physical prototype of the knotter was made and 500 knotting experiments were performed,of which 482 were successful,and the success rate was 98%.In the design process of K-type knotter,in order to solve the problem that the locking arc on the driven wheel in the traditional incomplete gear mechanism is too short,the driven wheel will swing at a large angle and the mechanism will be stuck.A new type of incomplete gear mechanism with a locking flange was proposed.The general design method is introduced,and with the help of ADAMS,Hyper Mesh and ANSYS/LS-DYNA software,the new incomplete gear mechanism is compared with the traditional incomplete gear mechanism in terms of kinematics,dynamics and contact stress.It is found that the new incomplete gear mechanism not only effectively solved the above problems,but also the new incomplete gear mechanism transitions smoothly from the non-meshing period to the meshing period,so the impact force is small.The increase of flanges does not affect the contact stress of incomplete gear mechanism.Finally,on the basis of 4GK100 all-in-one maize harvesting and bundling machine,the cutting tools and knotting machine were replaced with the research results in this paper.After designing the take-off and landing system and hydraulic power system for the cutting and baling machine,the mulberry branch cutting and baling test was carried out.Experimental results show that the above research can meet the requirements of use.