Research On Equipment Of Removing Internodal Culm Wall And Inner Layer Of Whole Bamboo

Since China's forest resources are increasingly in short supply,bamboo's characteristics of renewability,fast growth,and wide distribution has received growing attention.Therefore,comprehensive and effective bamboo processing methods have considerable significance on making up for the shortage of timber resources.China is leading bamboo producing country,and its bamboo forest area and bamboo production rank the top few around the world.However,traditional bamboo processing methods of labor intensity,low production efficiency and bamboo utilization seriously restrict the healthy development of bamboo processing industry.This paper analyses current whole bamboo flattening without cracks for low bamboo utilization ratio in actual production.Morever,for the feeding process in the method of removing internodal culm walls(ICW)and inner layer(IL)of whole bamboo simultaneously,this paper provides a processing equipment of simple structure,easy operation,high efficiency based on the specific characteristics of bamboo.Subsequently,overall structure is designed.Force & motion of the combined cutting tool based on the cutting principle are analysed.It is followed by static simulations for key components using ANSYS Workbench,and blade-rotor system dynamics simulation with ADAMS is carried out.Through these research work,the main work and conclusions of the paper are as follows:1.For technical difficulties of removing ICW and IL,this paper puts forward a processing method of removing ICW and IL simultaneously.This method not only adapts to the round and straight bamboo,but also to the change of ovality in radial direction and bending in axial direction of bamboo.2.The equipment of removing ICW and IL is designed in detail based on bamboo specific characteristics,including the combined cutting tool,driving parts,V-shaped floating clamping device.It applies to bamboo with a bending degree less than 30 mm,inner diameter between 80 and 130mm,wall thickness between 8 and 13 mm,length of 2500 mm.It has the advanteges of compact structure,easy operation,excellent performance and high processing accuracy,which provides the reliable guarantee for bamboo flattening without cracks.3.For verifying the feasibility of the combined cutting tool,the forces on the blade of the tool under the maximum operating condition are obtained based on force and motion analysis during stable cutting processes.4.Static simulation for the blade and pin under the maximum operating condition using ANSYS Workbench verifies the strength of key compenonts and give the positions where are easy to fail,which provides the basis for structural optimization of the blade.The natural frequency of the combined cutting tool by modal analysis is obtained,which checks the speed range of the equipment.5.Blade-rotor system dynamics simulation by ADAMS is carried out and the minimumspeed of bamboo processing is determined.And when the inner diameter of the bamboo tube is constant,the displacement,velocity,acceleration and force characteristic curve of blade centroid are obtained,which verifies the rationality of equipment design.