Abrasive flow machining experiments of connector of hydraulic line

WANG Jing-po1, LING Yang2, HANG Wei2, WEI Lan-qing2, YUAN Ju-long2
(1.State-Owned Wuhu Machinery Factory, Wuhu 241000, China; 2.Key Laboratory of Special
Equipment Manufacturing and Advanced Processing Technology, Ministry of Education,
Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: Aiming at the finishing of pipe inner wall of hydraulic line connector, aviation metal pipe joint parts were adopted as research objects, the machining mechanism and processing technology of abrasive flow machining finishing metal pipe joint inner wall were studied. Test abrasive particles were chosen according to the hardness of material. The effects of abrasive machining on surface quality and material removal of metal pipe joint wall were compared, so that abrasive particles and processing parameters of metal pipe joint were confirmed. Silicon carbide and diamond were selected as abrasive particles in the experiment, and the effects of abrasive particles on surface morphology, surface roughness and material removal were analyzed. The results indicate that abrasive flow machining can effectively reduce the internal surface roughness of the pipe, and the roughness value decreases from 400 nm~500 nm to below 200 nm. Comparing with diamond abrasive grains, the inner wall surface of the part formed by silicon carbide abrasive grains has lower roughness, better distribution of roughness values, and higher material removal efficiency.

Key words: hydraulic line connector; abrasive flow machining (AFM); processing technology; surface roughness; material removal