Research on electrochemical machining technology of group cylinder texture based on dry film mask
Micro-texture is widely used in friction and wear,thermal energy exchange,sealing of key components,biomedicine and many other fields.As a kind of micro-texture,cylinder texture plays an important role in increasing friction.Taking advantage of high electrochemical machining efficiency and no residual stress,a dry film mask electrochemical machining method of group cyl-inder texture was proposed.MS series dry film with high adhesion was selected to prepare mask,and the multi-physical field cou-pling analysis of flow field,electric field and reactant transfer was carried out.The effects of different template thickness on the e-lectrolyte flow velocity,bubble rate and conductivity in the processing area were studied.The analysis results show that the tem-plate with 50 μm thickness can bring higher electrolyte flow velocity on the surface of the workpiece,accelerate the discharge of products and bubbles,and electrical conductivity of the workpiece surface is higher.The effects of processing voltage,processing time and pulse duty cycle on the size of group cylinder texture were studied by experiments.The experiment results show that un-der the processing voltage of 25 V and the processing time of 15 s,the group cylinder texture with good localization can be ob-tained,and moreover,the mass transfer process of insoluble electrolysis products,bubbles,and electrolyte is further improved under the pulse electrolysis processing with a pulse duty cycle of 20％and a pulse frequency of 4 kHz.Finally,under the pre-ferred processing parameters of 25 V processing voltage,15 s processing time,20％pulse duty cycle,and 4 kHz pulse frequency,a group cylinder texture array with a diameter of 320.48 µm,a height of 15.06 μm,and a lateral corrosion coefficient EF=1 was processed on the TC4 surface.
mask electrolysisgroup cylinder texturedry film maskmachining quality
万方数据
维普
