基于响应面法的不同锯料角锯齿的木材切削力模型  

Modeling the cutting force in wood sawing with different radial clearance angles based on a response surface methodology

作　　者：李伟光[1] 张占宽[1] LI Weiguang;ZHANG Zhankuan(Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China)

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091

出　　处：《浙江农林大学学报》2018年第3期524-528,共5页Journal of Zhejiang A&F University

基　　金：国家自然科学基金资助项目(31270605)

摘　　要：木材锯切为闭式切削,其中侧刃的作用不可忽视。为探寻锯切过程中侧刃对切削力的影响并将其量化,采用不同锯料角锯齿对樟子松Pinus sylvestris和水曲柳Fraxinus mandshurica做单齿切削力试验,利用响应面分析法中的四因素三水平的Box-Behnken Design(BBD)试验设计和建模方法,研究了锯料角、切削厚度、含水率和刀具前角等参数对切削力的影响,并建立切削力模型。结果发现:采用响应面法建立的木材切削力多元回归数学模型,可较为有效地反映切削力与各因素之间的关系(R^2=0.92和R^2=0.94);在闭式切削过程中,锯齿的锯料角对切削力有一定影响,且随着锯料角的增加,切削力缓慢降低;切削厚度对切削力影响显著,其次是刀具前角,木材含水率、锯料角对切削力的影响最小。Wood sawing is a closed cutting process. The side edges are involved in wood sawing and the influ- ence of the radial clearance angle becomes particularly important. To explore the influences of the side edges on the cutting force in the wood sawing and quantify it, this study with Pinus sylvestris （pinus） and Fraxinus mandshurica （ash） as samples, used the four factors three levels of BBD test Design in the modeling response surface methodology for a cutting force experiment that was carried out with a single sawtooth having different radial clearance angles. The multiple response surface regression model of a cutting force was established by considering the effects of radial clearance angles, cutting thickness, moisture content, and rake angle. Results using the response surface methodology showed that the multiple regression mathematical model of the cutting force had a high accuracy and reliability （R^2 = 0.92 and R^2 = 0.94）. The radial clearance angle had a certain impact on the cutting force in wood closed cutting. Also with an increase in radial clearance angle, the cutting force decreased slowly. Overall for both kinds of wood, cutting thickness had an extremely important impact on cutting force, followed by the rake angle, then wood moisture content, and finally the radial clearance angle.

关 键 词：木材科学与技术 木材锯切 切削力 锯料角 响应面法 模型 

分 类 号：S781.61[农业科学—木材科学与技术] TS65[农业科学—林学]