Numerical Simulation Of Cutting Of Drum Chipper Optimization Design Of Roll

The wood-based panel is a glued pressed product obtained by mechaning plant materials.It is widely used in the field of building materials and home furnishing that is closely related to people's lives.The drum chipper has a high market utilization rate,but the energy consumption in the cutting process is large and the energy utilization rate of the cutting part is less than 25%of the total energy.Therefore,the cutting force of the drum chipper is studied to optimize the structural parameters of the drum chipper.It helps to improve the cutting theory of drum chippers,improving their service life and energy efficiency.It helps to formulate the manufacturing process of the knife roll to help the drum chipper blade roll manufacturing.The structural analysis of knife and roll is performed.The effects of cutting speed,feed rate,feed depth,and tool wear on cutting energy consumption is discussed.The force of the wood during the cutting process of the drum chipper is studied.Determining that the failure form of the wood belongs to the ?-? composite crack propagation.The crack propagation in the process of wood fracture is analyzed.The mechanical model of crack propagation in wood under the action of drum chipper is established.The variation of the shear component F?,F?and total cutting force F required for wood crack propagation were analyzed by MATLAB.The shear force F increases first and then decreases as the crack polar angle ? increases,it becomes larger as the fracture angle yo increases.The shear force F is proportional to the cutting thickness b,the cutting width l,and the cutting angle ?.Based on the ADAMS software environment,the changes of the shearing force of the wood under different knife roll speeds,different diameters of wood and the number of rings of the annual rings are explored.The crack propagation process is numerically simulated by ABAQUS.The stress and strain changes during crack propagation at different cutting angles and different cutter roll speeds are analyzed.The force F and force F? increase from steady to increasing with the increase of the speed of the knife roll.They increase first and then decrease with the cutting angle,and they are proportional to the diameter of the wood.To construct a mathematical model,based on the genetic algorithm,the bottom tool installation angle and the tool position angle are used as optimization variables,and the cutting power is designed as the objective function.The energy efficiency of the optimized drum chipper is increased by about 2%.In order to produce the knife roll,the optimization result is taken as the processing parameter,the processing equipment is selected,and the processing route of the drum chipper blade is drawn up.