The Study Of Fiber Fracture Simulation Of Cutting Process And Drilling Quality Prediction Of Spruce

Wood products are widely used in construction,furniture and other industries;The wood processing technic is affected by the structural and mechanical properties of wood.In order to improve the wood machining quality,reduce the machining cost,and make the wood machining process more efficient and energy saving,it is of great significance to study the wood machining quality evaluation.Taking spruce as the example,this paper analyzed the forms of fiber fracture and corresponding energy consumption in the process of spruce cutting fracture.the calculation formula of the energy consumption required by wood cutting was deduced.The fiber structure geometric model of spruce tracheid was established.The macroscopic and microscopic material parameters of spruce were obtained by mechanical test and theoretical calculation and the validity of them were verified by simulating the mechanical test process with finite element simulation.The micro-compression deformation and tensile fracture process of spruce were analyzed by finite element simulation,and the energy consumption formula of fiber fracture in spruce drilling process was derived based on the simulation results.Drilling has complex cutting process and fracture form,the quality evaluation system of spruce drilling is established based on the energy index.Spruce intelligent drilling machining parameters prediction optimization model,which used multiple physical domain information fusion technology,was trained by the drilling cylindricity and the invalid thickness data of Norway spruce under different machining parameters,and the drilling quality of Norway spruce under a certain condition of revolving speed and feed speed was predicted,the accuracy of prediction is more than 90%,it indicated the optimization model was verified.