本文選題：超聲輔助磨削 + 釬焊金剛石砂輪��； 參考：《南京航空航天大學(xué)》2015年碩士論文

【摘要】：超聲輔助磨削結(jié)合了傳統(tǒng)磨削和超聲加工的優(yōu)勢(shì),具有降低磨削力、提高砂輪壽命和加工表面質(zhì)量的特點(diǎn),適合于工程陶瓷類硬脆材料的加工。釬焊金剛石砂輪由于實(shí)現(xiàn)了磨粒與基體的冶金結(jié)合,因而具有很高的把持力和較高的磨粒出露高度,使得其磨削性能有異于傳統(tǒng)砂輪。本文在此基礎(chǔ)上開展了磨粒有序排布釬焊金剛石砂輪超聲輔助磨削Si C陶瓷的試驗(yàn),并進(jìn)行了相關(guān)研究。完成的主要工作包括:(1)開展了超聲輔助磨削Si C陶瓷的磨削力試驗(yàn),分析了超聲振動(dòng)和磨削參數(shù)對(duì)磨削力的影響以及超聲對(duì)磨削力比的影響,對(duì)比了釬焊砂輪與燒結(jié)砂輪的磨削力和磨削力比,闡釋了磨粒有序排布釬焊金剛石砂輪超聲輔助磨削Si C陶瓷的磨削力特性。(2)開展了超聲輔助磨削Si C陶瓷的磨削表面完整性試驗(yàn),分析了超聲振動(dòng)和磨削參數(shù)對(duì)磨削表面粗糙度和表面形貌的影響,對(duì)比了釬焊砂輪與燒結(jié)砂輪超聲輔助磨削下獲得表面粗糙度和表面形貌,闡釋了磨粒有序排布釬焊金剛石砂輪超聲輔助磨削Si C陶瓷時(shí)的加工表面特性。通過表面損傷和磨削比能研究了單顆磨粒最大切厚對(duì)材料去除機(jī)理的影響,并對(duì)單顆磨粒最大切厚對(duì)釬焊砂輪超聲輔助磨削Si C陶瓷的亞表面損傷的影響進(jìn)行了分析。(3)通過燒結(jié)金剛石砂輪在超聲輔助磨削和普通磨削下砂輪磨損形式的區(qū)別分析了超聲對(duì)燒結(jié)砂輪磨損的影響;研究了釬焊金剛石砂輪超聲輔助磨削Si C陶瓷時(shí)的磨粒磨損形式,并通過與燒結(jié)金剛石砂輪的對(duì)比闡釋了釬焊砂輪的磨損特性。
[Abstract]:Ultrasonic assisted grinding, which combines the advantages of traditional grinding and ultrasonic machining, has the advantages of reducing grinding force, improving the life of grinding wheel and machining surface quality. It is suitable for the machining of engineering ceramics hard and brittle materials. Due to the metallurgical combination of abrasive particles and matrix, brazed diamond grinding wheel has high holding force and high exudation height of abrasive particles, which makes its grinding performance different from that of traditional grinding wheel. On the basis of this, the experiment of ultrasonic assisted grinding of sic ceramics with ordered brazing diamond grinding wheel was carried out, and the related research was carried out. The main work accomplished includes: (1) the grinding force test of ultrasonic assisted grinding of sic ceramics is carried out. The influence of ultrasonic vibration and grinding parameters on grinding force and the influence of ultrasonic on grinding force ratio are analyzed. The grinding force and grinding force ratio of brazed wheel and sintered wheel are compared. The grinding force characteristic of ultrasonic assisted grinding of sic ceramics with ordered brazing diamond wheel with abrasive particles was explained. The grinding surface integrity test of sic ceramics with ultrasonic assisted grinding was carried out. The effects of ultrasonic vibration and grinding parameters on the surface roughness and surface morphology of grinding were analyzed, and the surface roughness and surface morphology obtained by ultrasonic assisted grinding with brazed grinding wheel and sintered grinding wheel were compared. The machined surface characteristics of ordered brazing diamond wheel for ultrasonic assisted grinding of sic ceramics are described. Through surface damage and grinding energy, the effect of the maximum shear thickness of a single abrasive particle on the material removal mechanism was studied. The effect of the maximum cutting thickness of single abrasive particle on the subsurface damage of sic ceramics by ultrasonic assisted grinding with brazed grinding wheel is analyzed. The area of grinding wheel wear form by sintering diamond wheel under ultrasonic assisted grinding and common grinding is analyzed. The influence of ultrasonic on wear of sintered grinding wheel was analyzed. The wear behavior of brazed diamond wheel for ultrasonic assisted grinding of sic ceramics is studied. The wear characteristics of brazed diamond wheel are explained by comparing with the sintered diamond wheel.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG580.6;TQ174.7

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