【摘要】：為增強(qiáng)軟固結(jié)磨粒氣壓砂輪基體的耐疲勞性和抗撕裂性,提出了基于短纖維增強(qiáng)理論調(diào)控氣壓砂輪基體力學(xué)性能的方法.分析了芳綸漿粕(PPTA-Pulp)短纖維增強(qiáng)氣壓砂輪基體性能的作用機(jī)理,通過(guò)理論公式與拉伸試驗(yàn)的相互驗(yàn)證,得出了增強(qiáng)后氣壓砂輪基體的彈性模量隨短纖維添加比例增大而增大的規(guī)律;通過(guò)短纖維不同添加比例的氣壓砂輪基體褲型試樣的撕裂對(duì)比試驗(yàn),證明了短纖維增強(qiáng)氣壓砂輪基體在提高抗撕裂性方面的有效性;仿真分析了增強(qiáng)后氣壓砂輪在不同工況下接觸區(qū)域的應(yīng)力分布特性,通過(guò)加工試驗(yàn),驗(yàn)證了短纖維增強(qiáng)氣壓砂輪對(duì)高硬度、高耐磨性模具高效加工的能力.
[Abstract]:In order to enhance the fatigue resistance and tear resistance of the pneumatic abrasive wheel matrix, a method to control the mechanical properties of the pneumatic wheel matrix based on the short fiber reinforcement theory was proposed. The mechanism of aramid pulp (PPTA-Pulp) short fiber reinforced air pressure grinding wheel matrix was analyzed, and the mutual verification of theoretical formula and tensile test was carried out. The law that the elastic modulus of air pressure grinding wheel matrix increases with the increase of the proportion of short fiber after reinforcement is obtained. Through the tear test of air pressure wheel matrix with different proportion of short fiber, it is proved that short fiber reinforced air pressure wheel matrix is effective in improving tear resistance. The stress distribution characteristics of the contact region of the reinforced pneumatic grinding wheel under different working conditions are analyzed by simulation. The processing tests show that the short fiber reinforced pneumatic grinding wheel can efficiently process the mould with high hardness and high wear resistance.
【作者單位】： 浙江工業(yè)大學(xué)特種裝備制造與先進(jìn)加工技術(shù)教育部/浙江省重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51175471,50575208,51205358) 浙江省科技廳創(chuàng)新團(tuán)隊(duì)項(xiàng)目(2011R50011-07)
【分類號(hào)】：TG743

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