鼓式削片机切削参数模拟研究

Numerical Simulation Study on Cutting Parameters of Drum Chipper

为解决实际生产过程中削片机切削能量损耗大、功率不匹配和生产效率较低等问题,基于断裂力学理论和Ⅰ、Ⅱ、Ⅲ型混合模态断裂准则,以及年轮对木材断裂的影响,将刀具旋转切削的动力学问题转为对木料的断裂分析。通过对木料在切削过程中的受力分析,确定裂纹扩展模型,构建了力学模型,推导并研究了切削力与各切削参数之间的关系;借助MATLAB软件建模分析切削角、木料半径和切削厚度与切削力的关系,得到切削角θ=π/4,裂纹极角φ=2π/5时,切削能耗较优。

In order to further solve the problems of much cutting energy loss, power mismatch and low production efficiency in the production process of drum chipper. Based on the theory of fracture mechanics, combined mode Ⅰ,Ⅱ and Ⅲ fracture criteria. Considering the impact of annual ring on the fracture of wood. The dynamic problem of rotating cutter was transformed into fracture analysis of wood. The cutting process of cylindrical crack wood was analyzed, the crack extension model was determined and the mechanical model was constructed, the relation between cutting force and cutting parameters was derived and studied. By making full use of the MATLAB software, the relationship between cutting angle, wood radius, cutting thickness and cutting force was analyzed, to build models for in-depth research. The cutting energy was optimal when the cutting angle θ=π/4 and the crack polar angle φ=2π/5.