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Scientia Silvae Sinicae ›› 2015, Vol. 51 ›› Issue (1): 112-118.doi: 10.11707/j.1001-7488.20150113

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JN-Type Micron-Sized Wood Fiber Shock Absorber

Ma Yan, Zhang Yaxin, Yuan Xu, Zhan Li, Yang Chunmei   

  1. Forestry and Woodworking Machinery Engineering Centre, Northeast Forestry University Harbin 150040
  • Received:2014-01-25 Revised:2014-04-08 Online:2015-01-25 Published:2015-01-23

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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

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