Energy aspects and workpiece surface characteristics in ultrasonic-assisted cylindrical grinding of alumina-zirconia ceramics
Energy aspects and workpiece surface characteristics in ultrasonic-assisted cylindrical grinding of alumina-zirconia ceramics
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DOI：
10.1016/j.ijmachtools.2014.12.002
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发表时间：
2015-03-01
影响因子：
14
通讯作者：
Akbari, Javad
中科院分区：
文献类型：
--
作者：
Zahedi, Ali;Tawakoli, Taghi;Akbari, Javad
超声波辅助磨削是一种改进难加工材料磨削工艺的新方法。在本研究中，设计和制造了一种新颖的装置，用于在外圆磨削中利用超声波振动。设计的超声波头使旋转工件沿轴向振动。选择氧化铝-氧化锆陶瓷（AZ90）作为工件材料。超声辅助外圆磨削 (UACG) 和传统外圆磨削 (CG) 工艺的能量方面和工件表面特性已进行分析建模，并进行了相应的磨削实验。圆柱形切入磨削工艺和轴向超声波振动的组合运动学提供了独特的表面处理条件，从而降低了表面形貌的峰高并增加了谷深。主轴向振动模式提供了相邻切削轨迹的重叠，从而使外圆切入磨削中的表面形貌变得平滑。分析和实验表明，根据工艺参数，应用超声波振动，研磨能量最多可降低 35% 以上。根据四个表面粗糙度参数和圆度误差研究了磨削工件的表面特征。 (C) 2014 Elsevier Ltd. 保留所有权利。
Ultrasonic assisted grinding is a novel method for improving the grinding process of difficult-to-cut materials. In the present research a novel setup has been designed and manufactured for utilizing ultrasonic vibrations in external cylindrical grinding. The designed ultrasonic head vibrates a rotating workpiece in axial direction. An alumina-zirconia ceramic (AZ90) has been selected as the workpiece material. Energy aspects and workpiece surface characteristics of ultrasonic assisted cylindrical grinding (UACG) and conventional cylindrical grinding (CG) processes have been analytically modeled and corresponding grinding experiments have been performed. The combined kinematics of the cylindrical plunge grinding process and axial ultrasonic vibrations provide a unique surface treatment conditions, which leads to reduced peak heights and increased valley depths of the surface topography. The main axial vibration mode provides the overlap of the adjacent cutting traces and consequently smoothens the surface topography in cylindrical plunge grinding. It has been analytically and experimentally shown that, applying ultrasonic vibrations, grinding energy can be reduced up to more than 35% depending on the process parameters. The surface characteristics of the ground workpieces have been investigated in terms of four surface roughness parameters and the roundness error. (C) 2014 Elsevier Ltd. All rights reserved.