本文選題：射流拋光 + 沖擊角度　； 參考：《潤(rùn)滑與密封》2017年10期

【摘要】：射流拋光技術(shù)能夠獲得原子級(jí)粗糙度和無(wú)損傷表面,已成為最具發(fā)展?jié)摿Φ某饣砻婕庸ぜ夹g(shù)之一,而沖擊角度是影響拋光效果的一個(gè)重要參數(shù)。利用自主研制的射流拋光實(shí)驗(yàn)機(jī),通過(guò)定點(diǎn)沖擊實(shí)驗(yàn),研究不同沖擊角度下的被加工表面材料去除形貌及去除量。實(shí)驗(yàn)結(jié)果表明,隨著沖擊角度的減小,材料去除形狀愈發(fā)不對(duì)稱(chēng),材料去除率逐漸降低,而最大去除深度出現(xiàn)非單調(diào)變化。結(jié)合沖擊射流流場(chǎng)分布和顆粒碰撞角度的變化,分析沖擊角度對(duì)材料去除特性的影響機(jī)制,發(fā)現(xiàn)射流沖擊角度對(duì)材料去除的影響主要?dú)w因于射流中顆粒碰撞角度及顆粒碰撞次數(shù)的變化;顆粒碰撞角度越大,碰撞次數(shù)越多,則材料去除量越大;兩者的綜合作用影響著材料去除量及材料去除分布。
[Abstract]:Jet polishing has become one of the most promising ultra-smooth surface processing techniques, and the impact angle is an important parameter that affects the polishing effect. By means of a jet polishing machine developed by ourselves, the surface material removal morphology and removal amount at different impact angles were studied through a fixed-point impact experiment. The experimental results show that with the decrease of impact angle, the shape of material removal becomes more asymmetrical, the removal rate of material decreases gradually, and the maximum removal depth changes in a non-monotonic manner. Combined with the change of impinging jet flow field and particle impact angle, the influence mechanism of impinging angle on material removal characteristics is analyzed. It is found that the influence of jet impingement angle on material removal is mainly attributed to the change of particle impact angle and the number of particle collisions in the jet, and the larger the particle impact angle is, the greater the impact number is, the greater the material removal is. The combined effect of the two influences the material removal amount and the material removal distribution.
【作者單位】： 北京林業(yè)大學(xué)工學(xué)院;清華大學(xué)摩擦學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金項(xiàng)目(YX2013-02) 國(guó)家自然科學(xué)基金項(xiàng)目(51275050)
【分類(lèi)號(hào)】：TB306
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本文編號(hào)：2117939