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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 consolidated abrasive particle wheel grinding wheel base, a method of controlling the mechanical properties of the pneumatic wheel grinding wheel base is proposed based on the theory of short fiber reinforcement.The effects of PPTA-Pulp short fiber reinforcement Through the mutual verification of the theoretical formula and the tensile test, the law that the elastic modulus of the base body of the pneumatic wheel increases with the increase of the short fiber addition ratio is obtained. Through the comparison of the short fiber addition ratio The comparison test of the tear of the trouser sample of the pneumatic grinding wheel base body proved the effectiveness of the short fiber reinforced pneumatic grinding wheel base in improving the tear resistance. The stress distribution of the contact grinding wheel under different working conditions was simulated and analyzed Features, through the processing test to verify the short fiber reinforced pneumatic wheel on the high hardness, high wear resistance of the mold and efficient processing capacity.