磨粒有序排布钎焊金刚石砂轮超声辅助磨削SiC陶瓷试验研究

发布时间：2018-04-30 00:26

本文选题：超声辅助磨削 + 钎焊金刚石砂轮　；参考：《南京航空航天大学》2015年硕士论文

【摘要】：超声辅助磨削结合了传统磨削和超声加工的优势,具有降低磨削力、提高砂轮寿命和加工表面质量的特点,适合于工程陶瓷类硬脆材料的加工。钎焊金刚石砂轮由于实现了磨粒与基体的冶金结合,因而具有很高的把持力和较高的磨粒出露高度,使得其磨削性能有异于传统砂轮。本文在此基础上开展了磨粒有序排布钎焊金刚石砂轮超声辅助磨削Si C陶瓷的试验,并进行了相关研究。完成的主要工作包括:(1)开展了超声辅助磨削Si C陶瓷的磨削力试验,分析了超声振动和磨削参数对磨削力的影响以及超声对磨削力比的影响,对比了钎焊砂轮与烧结砂轮的磨削力和磨削力比,阐释了磨粒有序排布钎焊金刚石砂轮超声辅助磨削Si C陶瓷的磨削力特性。(2)开展了超声辅助磨削Si C陶瓷的磨削表面完整性试验,分析了超声振动和磨削参数对磨削表面粗糙度和表面形貌的影响,对比了钎焊砂轮与烧结砂轮超声辅助磨削下获得表面粗糙度和表面形貌,阐释了磨粒有序排布钎焊金刚石砂轮超声辅助磨削Si C陶瓷时的加工表面特性。通过表面损伤和磨削比能研究了单颗磨粒最大切厚对材料去除机理的影响,并对单颗磨粒最大切厚对钎焊砂轮超声辅助磨削Si C陶瓷的亚表面损伤的影响进行了分析。(3)通过烧结金刚石砂轮在超声辅助磨削和普通磨削下砂轮磨损形式的区别分析了超声对烧结砂轮磨损的影响;研究了钎焊金刚石砂轮超声辅助磨削Si C陶瓷时的磨粒磨损形式,并通过与烧结金刚石砂轮的对比阐释了钎焊砂轮的磨损特性。
[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.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG580.6;TQ174.7

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