JN型微米木纤维减震器

doi:10.11707/j.1001-7488.20150113

摘要/Abstract

摘要：

[目的]利用微米木纤维为原材料代替难以降解的橡胶和塑料,制作出适用于机械设备或汽车减震装置的JN型木纤维减震器,研究JN型木纤维减震器的选材、加工工艺及数学建模方法,为减震器数控加工机床和数控系统的研制与开发提供理论依据. [方法]以密度为0.439 g ·cm^-3、含水率为12%~15%、平均厚度可达到52 μm的红松微米木纤维为基材,利用冷硫化和复合材组构理论,采用热压模具定型方法制作出JN型微米木纤维减震器样品,测量样品的质量、体积并观察样品浸泡在水中24 h后的外形状态.在基本假设的基础上,用包络法和规则几何体建模法建立JN型微米木纤维减震器的数学模型,并利用Matlab软件对JN型微米木纤维减震器进行仿真分析.[结果]JN型微米木纤维减震器样品的密度在0.91~1.36 g ·cm^-3之间,质量在1.4~2.0 kg之间,在水中浸泡24 h不会变形.仿真分析结果证明JN型微米木纤维减震器数学模型具有一定的通用性和准确性.[结论]按规定的加工工艺制备的JN型微米木纤维减震器样品符合密度、弹性要求,并且具有抗水性;JN型木纤维减震器的建模由底座和规则梯形台构成,模型参数具有通用性,直接将底座和规则梯形面相关尺寸参数输入模型方程,可获得JN型木纤维减震器的不同加工尺寸;为保证JN型木纤维减震器的实用尺寸和外观,降低生产成本,整个模压加工过程必须在一套模具上完成.

关键词: 微米木纤维, 木橡胶, 减震器, 数学建模

Abstract:

[Objective]Producing wood-based rubber JN-type shock absorber is suitable for machinery equipment or automotive shock absorber, by use micron wood fiber in place of rubber and plastics. Theoretical feasibility of wood-based rubber JN-type shock absorber material selection, availability of manufacturing process method and the mechanical properties of micron wood fiber absorber sample are studying. The specific content of study include: wood-based rubber JN-type shock absorber mathematical modeling equations and simulation analysis and preparation of mold. [Method]Using cold vulcanized and composite materials fabric theory, pressing mold shaping method produces high elastic micron wood fiber JN-type damper. Pine micron wood fiber with a density of 0.439 g ·cm^-3, a moisture content of 12% to 15%, with an average thickness of up to 52 μm was chosen to make micron wood fiber JN-type damper sample, through the process of preparation, selection, mixed plastic, molded, heat packing, unloading mode and verification. The quality and volume of sample was measured, the shape state of sample was observed after immersion in water for 24 h. Micron wood fiber wood-based rubber JN-type shock absorber mathematical model based on the assumption, that its shape is ideal shape. Its upper seen as a standard trapezoidal station, the hole in the middle as standard cylinder; the base is a combination of rectangular, semi-circular and ramp round hole in the middle. Assuming coordinates system of NC machining and micron wood fiber JN-type damper mathematical model is parallel and in the same direction. Micron wood fiber JN-type damper based center was selected for the origin of coordinates, and makes mathematical model with the envelope and geometry modeling method, and carried out simulation by using Matlab. The driver of JN-type shock absorber various types and sizes was stored inside CNC machine, its mold processing is done by positioning setup process once. [Result]Using oil sludge product mold, micron wood fiber JN-type damper sample was produced, though a series of processing and production process. Sample density at 0.91-1.36 g ·cm^-3, the quality at 1.4-2.0 kg, it's not deformed when soaked in water for 24 h. Matlab simulation results prove micron wood fiber JN-type wood-based rubber shock absorber mathematical model has some versatility and accuracy. [Conclusion]Micron wood fiber cell wall are elastic, the cell structure of wood are destroyed, eliminating strength influence of cavity glue and knots. The wood fibers have mutually attractive force, after the molding process, to form a high compression ratio and highly elastic material likes rubber. With sample regulations preparing process, JN-type shock absorber was pressed by micron wood fiber is water resistant and meets the requirement of density and elasticity. Wood-based rubber JN-type shock absorbers' modeling is consisted of a base station and rule trapezoidal configured, model parameters has the practicality, versatility and accuracy. The molding process is completed in a mold to ensure the practical size and appearance of wood-based rubber JN-type shock absorber.

Key words: micron-sized wood fiber, wood-based rubber, shock absorber, mathematical model

中图分类号:

TS65

马岩, 张亚新, 袁旭, 战丽, 杨春梅. JN型微米木纤维减震器[J]. 林业科学, 2015, 51(1): 112-118.

Ma Yan, Zhang Yaxin, Yuan Xu, Zhan Li, Yang Chunmei. JN-Type Micron-Sized Wood Fiber Shock Absorber[J]. Scientia Silvae Sinicae, 2015, 51(1): 112-118.

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