文献类型：期刊文献

英文题名：Simulation analysis of the circular sawing process of medium density fiberboard (MDF) based on the Johnson-Cook model

作者：Yu, Mingyang[1] Wang, Bin[1] Ji, Pengliang[1] Li, Bo[2] Zhang, Luo[3] Zhang, Qingdong[1]

第一作者：Yu, Mingyang

通信作者：Li, B[1]

机构：[1]Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[3]AVIC Changhe Aircraft Ind Grp Corp Ltd, Jingdezhen 333002, Jiangxi, Peoples R China

年份：2023

外文期刊名：EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS

收录：;EI(收录号：20234515030855);Scopus(收录号：2-s2.0-85175840222);WOS:【SCI-EXPANDED(收录号:WOS:001098098700001)】；

基金：We gratefully acknowledge the financial support of Fundamental Research Funds for the Central Nonprofit Research Institution of CAF No. CAFYBB2019QB006, and National Natural Science Foundation of China (No. 32171710), and Beijing Natural Science Foundation (No. 3232022).

语种：英文

外文关键词：Building materials - Sawing - Urea - Urea formaldehyde resins - Wood products

摘要：Medium density fiberboard (MDF) is a commonly used engineered wood product. Sawing is a key process in MDF usage. In this study, a Johnson-Cook constitutive model for two types of MDF under high-speed impact was developed, and a simulation model for the circular sawing process that calculates cutting forces under different process parameters was created. The accuracy of the simulation model was verified through sawing experiments and the effects of cutting speed, feed per tooth, and saw blade position on cutting force and surface roughness were analyzed. The results indicate that MDF prepared with poly 4,4 '-diphenylmethane diisocyanate (pMDI) has better mechanical properties than MDF made with urea-formaldehyde (UF) resin, leading to greater cutting force and surface roughness during processing. The cutting surface roughness and cutting force are positively correlated with the cutting speed and feed per tooth, and the excessive cutting speed leads to the cutting system's vibration, which makes them increase more obviously. Increase the distance between the rotation axis of the saw blade and the workpiece results in more sawteeth participating in the cutting process, which increases the cutting force but also reduces the axial force fluctuation and the surface roughness.