Experimental Investigation of Adherent Vibratory Finishing for Sheet Specimens
WANG Xiu-zhi;YANG Sheng-qiang;LI Wen-hui;CHEN Yu-nan;ZHANG Qiao-yun;College of Mechanical Engineering,Taiyuan University of Technology;Shanxi Key Laboratory of Precision Machining,Taiyuan University of Technology;
The work aims to propose an adherent vibratory finishing processing technology for small and medium-sized sheet specimens to improve surface quality.Spherical corundum abrasive particles and HYA grinding fluid were selected asprocessing medium.Processing experiments for single-sided adherent specimens and free specimens were conducted using four kinds of specimens made from 45~# steel,titanium alloy TC4(Ti-6 Al-4 V),aluminum alloy(A356) and 304 stainless steel.The specimen size was 10 mm × 20 mm × 3 mm,and 10 mm × 20 mm surface was processed during adherent vibratory finishing.Surface roughness value of the free specimens and adherent specimens in 5 different positions was compared before and after processing to determine advantages of adherent vibratory finishing and the relative optimal processing position.Dynamic forces of abrasive particles to the sensor(i.e.,the abrasive particles to the specimen) in 5 different positions were tested using a dynamic force sensor,so as to find load-carrying rule in different processing position.In the processing experiment of two sets of 45~# steel specimens with initial surface roughness Ra value of about 2.6 μm,the Ra value of the free specimens was still 2.4 μm in 1 h,and for adherent specimen,less than 0.5 μm.According to the experimental results of titanium alloy,aluminum alloy and stainless steel specimens processed in different positions,the bottom of the container was the relative optimal processing position,followed by inner middle position,which was superior to other three positions.The influence rule of inner upper position,outer middle position and outer upper position on processing effect was not obvious.Average force of abrasive particles to the sensor at the bottom of the container was the maximum,which was 2.728 N.And the dynamic force at the position of inner middle position,outer middle position,inner upper position and outer upper decreased successively.Overall trend of the force distribution in different positions basically corresponded to the result of the specimens processing.Processing efficiency of adherent vibratory finishing is higher than that of free vibratory finishing.The bottom of the container is the relative optimal processing position for specimens to obtain the best surface roughness.Processing effect of specimens is directly related to the dynamic force of abrasive particles carried by the specimens.The adherent vibratory finishing processing technology can be applied to improve the surface quality of small and medium-sized sheet parts.
【Fund】： 国家自然科学基金(U1510118);; 教育部高等学校博士学科点专项科研基金(20131402110002);; 山西省科技攻关项目(2015031011-3)~~
【CateGory Index】： TG580.616
【CateGory Index】： TG580.616