Investigating the Resistance Expression Method of Wood Resistance Drill Instruments

IF 1.1 4区农林科学 Q3 FORESTRY

Forest Products Journal Pub Date : 2023-05-01 DOI:10.13073/fpj-d-23-00005

Jianfeng Yao, Jun Lu, Xilong Ding

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引用次数: 1

Abstract

Wood density is an important attribute that is positively correlated with many wood quality parameters. How to express wood density with drill resistance is a challenge. In this study, we determined the optimal resistance expression using the current, voltage, and power of the DC (Direct-Current) motor. Nine wood blocks crossing over the pith, with widths and heights of 2 cm and 5 cm, respectively, were obtained from three larch (Larix spp.) trees. The microdensity of each wood block at every 0.1-mm length was measured, and the average current, voltage, and power of the DC motor was recorded when the drill fed forward at every 0.1 mm by a self-manufactured resistance drill. The drill path was parallel to the lengthwise direction of the block. The linear models between the current, voltage, and power of the DC motor and wood microdensity were subsequently established, and the model with the highest R2adj was selected to express the resistance. The adjusted R2adj of the forward stepwise regression models between the current, voltage, and power of the DC motor and wood microdensity were determined as 0.2943. This suggests that the drilling needle resistance expressed with the current, voltage, and power or other combination may be optimal.

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木材阻力钻具阻力表达方法研究

木材密度是一个重要的属性，与许多木材质量参数呈正相关。如何用钻孔阻力来表达木材密度是一个挑战。在这项研究中，我们使用直流电机的电流、电压和功率来确定最佳电阻表达式。从三棵落叶松（Larix spp.）树上获得了9个横跨木髓的木块，宽度和高度分别为2厘米和5厘米。测量每0.1mm长度的每个木块的微密度，并记录当钻头通过自制的电阻钻头以每0.1mm向前进给时DC电机的平均电流、电压和功率。钻孔路径与块体的纵向方向平行。随后建立了直流电机的电流、电压和功率与木材微观密度之间的线性模型，并选择R2adj最高的模型来表示电阻。直流电机的电流、电压和功率与木材微密度之间的正向逐步回归模型的调整R2adj被确定为0.2943。这表明，用电流、电压和功率或其他组合表示的钻针电阻可能是最佳的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Forest Products Journal 工程技术-材料科学：纸与木材

CiteScore

2.10

自引率

11.10%

发文量

审稿时长

6-12 weeks

期刊介绍： Forest Products Journal (FPJ) is the source of information for industry leaders, researchers, teachers, students, and everyone interested in today''s forest products industry. The Forest Products Journal is well respected for publishing high-quality peer-reviewed technical research findings at the applied or practical level that reflect the current state of wood science and technology. Articles suitable as Technical Notes are brief notes (generally 1,200 words or less) that describe new or improved equipment or techniques; report on findings produced as by-products of major studies; or outline progress to date on long-term projects.