文献类型：期刊文献

中文题名：木工圆锯片锯齿侧刃参数对锯切表面粗糙度的影响

英文题名：Effect of the Side Edge Parameters of Sawteeth on the Surface Roughness in Woodworking Circular Sawing

作者：李伟光[1] 张占宽[1]

第一作者：李伟光

通信作者：Zhang, Zhankuan

机构：[1]中国林业科学研究院木材工业研究所国家林业和草原局木材科学与技术重点实验室

年份：2019

卷号：55

期号：1

起止页码：66-73

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;EI(收录号：20191806848051);Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金项目(31270605)

语种：中文

中文关键词：表面粗糙度;锯切;侧刃;径向侧后角

外文关键词：surface roughness;sawing;side edge;the radial clearance angle

分类号：TS643

摘要：【目的】分析锯齿侧刃参数对锯切表面粗糙度的影响,通过优化锯齿侧刃参数,解决圆锯锯切时进给速度提高与表面粗糙度增大之间的矛盾,为新型木工圆锯片设计提供参考和指导。【方法】提出微量零径向侧后角锯齿的概念,使用9种不同锯齿侧刃参数的圆锯片,以水曲柳和高密度纤维板为对象进行锯切试验,研究不同进给速度下径向侧后角和零径向侧后角段对锯切表面粗糙度的影响。【结果】随着进给速度增加,锯切表面粗糙度增大,径向侧后角减小,锯切表面粗糙度降低,无零径向侧后角段锯齿锯切形成的表面粗糙度均高于具有零径向侧后角段锯齿,特别是当零径向侧后角段由0 mm增加到0.5 mm时,锯切表面粗糙度下降最为明显。当零径向侧后角段大于0.5 mm时,侧刃的零径向侧后角段具有"以锯代刨"的作用,与零径向侧后角锯齿相比同样可起到改善锯切表面质量的作用。【结论】锯切表面粗糙度一定程度上取决于锯痕深度。在实际锯切过程中,仅有长度近似等于每齿进给量的锯齿侧刃部分参与切削,占侧刃总长度的很小一部分,微量零径向侧后角锯齿中零径向侧后角段长度比每齿进给量略大且越接近每齿进给量越理想。具有微量零径向侧后角段锯齿的圆锯片与零径向侧后角锯齿相比,同样可起到改善锯切表面质量的作用;在保持其他切削参数不变的情况下,微量零径向侧后角段锯齿还可以减小锯齿侧刃与锯路壁之间的摩擦。
【Objective】There is contradiction between the improving quality and increasing efficiency at the same time in wood sawing.The aims of this study were to analyze the influences of the side edges on the surface roughness using circular saw with different parameters of side edges,to solve the contradiction between high feed speed and the better surface roughness,and expected to provide references and guidance for designing the new type of woodworking circular saw.【Method】The concept of the sawteeth with mic-zero degree radial clearance angle was put forward in this paper.The experiments were carried out on the northeast China ash(Fraxinus mandshurica)and high density fiberboard(HDF)as materials and nine kinds of circular saw blades with different sawteeth side edge parameters were used with different feed speed,so as to investigate the influences of different radial clearance angles and straight length of zero degree radial clearance angle on the surface roughness(Ra).【Result】The surface roughness increased with the increase of feed speed,when the radial clearance angle is decreased,the surface roughness saw is decreased.The surface roughness of the sawteeth formed by the sawteeth with radial clearance angles was higher than that of the sawteeth with the sawteeth had a mic-zero-degree radial clearance angle.Especially when the straight length of zero degree radial clearance increased from 0 to 0.5 mm,the decrease trend was the most obvious.【Conclusion】The surface roughness depends on the depth of the saw notch to a certain extent.A small part of side edge which formed the sawing surface participates in actual cutting,and the length of this part of side edge is approximately equal to the feed per tooth.The sawteeth with mic-zero degree radial clearance angle can improve the surface quality of sawing.Besides,under the condition that the other cutting factors remain unchanged,the surface roughness can be improved and the friction also can be reduced between side edges and sawing surface by increasing the feed speed.