随机短纤维增强气压砂轮基体性能的研究

Mechanical Characteristic of the Substrate of Random Short Fiber Reinforced Soft-consolidation Abrasives Pneumatic Wheel

为增强软固结磨粒气压砂轮基体的耐疲劳性和抗撕裂性,提出了基于短纤维增强理论调控气压砂轮基体力学性能的方法.分析了芳纶浆粕(PPTA-Pulp)短纤维增强气压砂轮基体性能的作用机理,通过理论公式与拉伸试验的相互验证,得出了增强后气压砂轮基体的弹性模量随短纤维添加比例增大而增大的规律;通过短纤维不同添加比例的气压砂轮基体裤型试样的撕裂对比试验,证明了短纤维增强气压砂轮基体在提高抗撕裂性方面的有效性;仿真分析了增强后气压砂轮在不同工况下接触区域的应力分布特性,通过加工试验,验证了短纤维增强气压砂轮对高硬度、高耐磨性模具高效加工的能力.

In order to enhance the fatigue resistance and tear resistance of the soft-consolidation abrasives pneumatic wheel substrate, the method of short fiber reinforced to regulate mechanics performance of the pneumatic wheel substrate was proposed.The mechanism of PPTA-Pulp short fiber reinforced of the pneumatic wheel substrate was analyzed. By the theoretical formula and the tensile test, the conclusion that the Young＇s modulus increased with the proportion of the short fibers added into the substrate was obtained. By the tearing comparative test of the pants specimens with different proportions of the short fibers, the effectiveness of improving tear resistance was confirmed. The contact stress distribution features of the pneumatic wheel in different conditions was analyzed. With the experimental results made on the pneumatic wheel polishing system, the method of short fiber reinforced of the pneumatic wheel substrate to increase the processing efficiency on hardness and wear resistance mould is very effective.