摘要
为了提高欧式门窗材切削效率,改善切削性能,对欧式门窗材四面刨整体结构进行了设计,并对木材刨削进行有限元仿真分析。首先对四面刨的整体布局进行设计,并阐述四面刨的总体结构和工作原理。其次,从木材的各向异性特性出发,建立其平衡、几何和本构方程,从而推导得出相应的力学模型。选择MAT_20和MAT_143分别作为刀具和木材的材料模型,在Hypermesh中构建旋转刨刀切削木材的有限元模型,并利用LS-DYNA求解器对切削过程进行求解,分别得到切削过程中刀具和木材的应力云图和等效应力曲线图。通过分析可知刀具在切削过程中所受的最大应力位于刀身装夹处,木材所受最大应力在木材上表面切屑分离处。建立了木材切削失效力学模型,准确地模拟了木材切削过程,为优化切削运动参数提供了理论参考,对优化刀具的结构和材料参数具有重要意义。
In order to improve the cutting efficiency and performance of European door and window materials,the whole structure of four-side planers for European doors and windows was designed,followed by finite element-based simulation analysis of wood planing.First of all,the overall layout of the four-sided planer was designed,and the overall structure and working principle of the four-sided planer were explained.Secondly,based on the anisotropic properties of wood,the equilibrium,geometric and constitutive equations were established,and the corresponding mechanical models were derived.MAT_20 and MAT_143 were selected as the material models of cutting tools and wood respectively.A finite element model of cutting wood with rotary plane tool was constructed in Hypermesh,and the ls-dyna solver was used to solve the cutting process,and the stress cloud diagram and equivalent stress curve diagram of cutting tool and wood were obtained.Through the analysis,it can be known that the maximum stress on the cutting tool is at the clamping place of the cutting tool body,and the maximum stress on the wood is at the chip separation place on the upper surface of the wood.Establishment of a mechanical model for wood cutting failure,and accurate simulation of the wood cutting process.This cutting process provides a theoretical reference for optimizing the cutting motion parameters and is important for optimizing the tool's structure and material parameters.
作者
马岩
邓英健
杨春梅
缪骞
蒋婷
MA Yan;DENG Ying-jian;YANG Chun-mei;MIAO Qian;JIANG Ting(Forestry and Woodworking Machinery Engineering Technology Center,Northeast Forestry University,Harbin Heilongjiang 150040,China)
出处
《林业机械与木工设备》
2019年第11期19-24,共6页
Forestry Machinery & Woodworking Equipment
基金
黑龙江省应用技术研究与开发计划项目(GA19A402)
