圆管切向振动辅助磨料流的光整加工试验研究  

Experimental study on tangential vibration assisted abrasive flow finishing of circular tubes

作　　者：王硕 董志国 郑志鑫 温永吉 陈攀 WANG Shuo;DONG Zhiguo;ZHENG Zhixin;WEN Yongji;CHEN Pan(School of Mechanical and Transportation Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Provincial Key Laboratory of Precision Processing,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,太原030024 [2]精密加工山西省重点实验室,太原030024

出　　处：《金刚石与磨料磨具工程》2024年第4期544-552,共9页Diamond & Abrasives Engineering

基　　金：山西省自然科学基金(2021-0302-123104)。

摘　　要：传统磨料流加工技术在加工孔道内壁、形状复杂的工件时,工件表面在各个方向上的加工质量不均匀。在传统磨料流加工中加入振动辅助,使工件表面形成波浪形加工轨迹,以提高工件表面质量和材料去除效率。分析振动辅助加工原理和磨粒对工件表面的划痕作用,搭建振动辅助磨料流加工试验平台,研究磨料流速、振幅、频率对工件表面粗糙度与表面形貌的影响。结果表明:与传统磨料流加工相比,振动辅助磨料流加工使磨粒在工件表面的切削路径变长,形成交叉划痕,工件表面粗糙度降低;振动频率越高,磨粒与工件表面间的微切削长度越长,工件的表面粗糙度越低;磨料流速增大,磨粒对工件表面的切削效果增强,表面粗糙度下降的幅度更大。Objectives:When the traditional abrasive flow machining(AFM)technology is used to process workpieces with complex shapes and inner walls of the tunnels,the machining quality of the workpiece surface tends to be uneven in each directions.To address this,the vibration assistance is added to traditional abrasive flow machining,forming a wavy machining track on the workpiece surface.This technique generates interwoven scratch textures,reduces the roughness value of the workpiece surface in all directions,and improves the surface quality and material removal effi-ciency converging the surface roughness.Methods:By rotating a cam to drive a connecting rod,vibration is induced in a round tube,altering the flow field distribution characteristics of the fluid abrasive and the mode of abrasive phase movement.This enables a new relative movement between the fluid abrasive and the workpiece surface.The principle of vibration-assisted machining and the scratching effect of abrasive particles on the workpiece surface were analyzed.At the same time,different frequencies and amplitudes were achieved by varying the motor speed and adjusting the long and short half-axes of the elliptical cam.A test platform for vibration-assisted abrasive flow machining was built to study the effects of abrasive flow rate,amplitude,and frequency on workpiece surface roughness and topography.Res-ults:(1)After 2,4,and 6 processing cycles without vibration,the surface roughness of the Cu-1 workpiece was reduced to 0.187,0.123,and 0.112μm,respectively.After 2,4 and 6 processing cycles with vibration,the surface roughness of the Cu-4 workpiece decreased from an initial 0.230μm to 0.139,0.114,and 0.106μm,respectively.The surface rough-ness of the workpiece polished with vibration was lower than that without vibration.At the same time,under non-vibra-tion conditions,the transverse fringes of the original surface of Cu-1 after machining remained visible,although its sur-face roughness were significantly reduced.When Cu-4 was processed for 6 times under

关 键 词：磨料流加工 振动辅助 划痕形貌 表面粗糙度 

分 类 号：TG73[金属学及工艺—刀具与模具] TG58