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Wear mechanism and life of brown corundum abrasive belt in wood sanding process(PDF)

Journal of Forestry Engineering[ISSN:2096-1359/CN:32-1862/S]

Issue:
2020 No.06
Page:
121-127
Research Field:
装备与信息化 执行主编：周宏平
Publishing date:
2020-11-01

Info

Title:
Wear mechanism and life of brown corundum abrasive belt in wood sanding process
Author(s):
YANG Yaqi;  WANG Shengying;  ZHANG Yiming;  ZHANG Jian;  LUO Bin*
College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
Keywords:
sanding;  material removal rate;  abrasive wear;  surface roughness;  belt life
PACS:
TS652
DOI:
10.13360/j.issn.2096-1359.202002007
Abstract:
Belt sanding is an important technology in the wood processing industry. The purpose of this study was to further improve the theory of wood sanding and promote the development and manufacture of new sand belts by analyzing the wear mechanism of sand belts in the sanding process and its influence on the removal rate and surface roughness of wood materials. In this study, using Pinus koraiensis wood as experiment materials, the material removal rate of workpiece was analyzed. The arithmetic average height Sa of the abrasive belt surface, sanding grain of kurtosis Sku and the change of surface morphology of the abrasive belt surface were discussed. And the arithmetic average height Sa of the surface of the workpiece and the expanded area ratio Sdr of the workpiece interface were also used as the inspection indicators. The abrasive belt wear mechanism and the effect of abrasive belt wear on the surface roughness of Pinus koraiensis were explored, and comprehensively evaluated the abrasive belt life. With the same technological parameters, the removal rate of the transverse sanding was higher than that of the longitudinal sanding, and the wear consumption of belt was lower than that of the longitudinal sanding. In the process of the transverse sanding, more abrasive grains were broken and fell off in the initial stage. In the midstage, abrasive grains were constantly updated and selfsharpened to maintain the effective sanding of the belt. In the last phase, the proportion of abrasive grains fell off and the wear was greater than that of crushing, and the service life of the belt finally reached its limit. In the process of the longitudinal sanding, the proportion of sanding grains being broken and dulled was larger in the initial stage, and the top of grains was gradually dulled in the midstage. In the last phase, in addition to falling off, the grains were broken again and picked up the wood fiber, and finally the belt failed. The service life of the belt had reached the limit when the material removal rate reached about 5%. In determining the service life of the belt in the actual wood sanding process, the material removal rate of the belt and the surface quality of the test piece must be comprehensively examined.

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Last Update: 2020-11-11