气鼓轮砂带砂光饰面中密度纤维板的磨削力与表面粗糙度

doi:10.11707/j.1001-7488.LYKX20220353

Abstract

Abstract:

Objective: In order to provide theoretical reference for better controlling the sanding surface roughness of the wood board with air-drum belt sanding, the effect of sanding parameters on grinding force and the relationship between grinding force and sanding surface roughness were studied. Method: The main research contents included: we carried out the single factor tests on the air-drum belt sanding MDF (medium-density fiberboard), established the finite element model of the air-drum belt sanding MDF, based on fluid cavity theory. By combining the finite element model with the single factor tests, we investigated the influence of air drum pressure, feed rate and axis parallelism error on the sanding force and the sanding surface roughness, and analyzed the relationship between sanding force and surface roughness. Result: With the increase of air drum pressure, feed rate and axial parallelism error, the sanding force of the specimen increased, but the reasons for the increase of the sanding force were different. The normal stress at the contact center of the specimen was mainly related to the air pressure of the air drum. Corresponding to the measuring point in the middle area (6-59 mm), the local sanding force of the specimen in the air drum pressure group and the feed group were approximately equal, and the local sanding force of the measuring point was approximately linearly related to the position during contact of the specimen in the axial parallelism error group. The air pressure of the air drum had little effect on the sanding force and surface roughness of the specimen, while the feed rate can significantly improve the surface roughness of the specimen. The linear fitting correlation coefficient R² between the surface roughness of the specimen and the local sanding force was 0.975, the linear fitting correlation coefficient R² with the total sanding force was 0.871, and the linear correlation coefficient between the surface roughness and the local sanding force is better. Conclusion: The finite element model of the air-drum belt-sanded MDF can accurately predict the sanding force of specimen. When analyzing the relationship between the grinding force and the surface roughness of specimen, choosing the local grinding force of specimen is better than the total grinding force and the normal stress of specimen.

Key words: surface roughness, medium density fiberboard, finite element model, sanding force

CLC Number:

S777

Caimei Liu,Xizhi Wu,Yuyang Wu,Xianjun Li. Sanding Force and Surface Roughness of Air-Drum Belt Sanding Finished MDF[J]. Scientia Silvae Sinicae, 2024, 60(3): 131-140.

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编号 Number	气鼓轮气压 Air drum pressure/ MPa	进给量 Feed rate/ mm	轴平行度误差 Axis parallelism error/mm
Z-1/ Q-1	0.040	0.75	0
Z-2/Q-2	0.045	0.75	0
Z-3/ Q-3	0.050	0.75	0
Z-4/ Q-4	0.055	0.75	0
Z-5/ Q-5	0.045	0.50	0
Z-6/Q-6	0.045	0.75	0
Z-7/ Q-7	0.045	1.00	0
Z-8/ Q-8	0.045	1.25	0
Z-9/ Q-9	0.045	0.75	0
Z-10/Q-10	0.045	0.75	0.5
Z-11/ Q-11	0.045	0.75	1.0
Z-12/ Q-12	0.045	0.75	1.5

部件Part	材料Material	材料参数Material parameters
气囊Airbag	橡胶Rubber	C₁₀=0.408 0，C₀₁=0.314 7
砂布Abrasive cloth	帆布Canvas	E₁=3 020 MPa，μ₁=0.27
试件Specimen	椴木饰面中密度纤维板Basswood veneer MDF	E₂=10 300 MPa，μ₂=0.3

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Sanding Force and Surface Roughness of Air-Drum Belt Sanding Finished MDF

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