Research On Microstructure And Super-hydrophobicity Of Red Copper Surface Milling

With the rapid development of the modern manufacturing industry,the market demand for micro and small parts is increasing,especially in the fields of biomedicine,communication electronics,aerospace,military industry and precision instruments,which have broad application prospects.This makes micro-cutting precision machining Technology has attracted much attention.Compared with conventional machining,the mechanism of micro-cutting material removal is more complicated,the process parameter control is stricter,and the machining accuracy is more difficult to guarantee.Therefore,micro-cutting machining technology has become a hot spot of current research.Because copper is often used as a material for microelectrodes,this article takes copper surface micromilling as the research object to study the minimum cutting thickness of copper surface micromilling,the factors affecting copper micromilling tool fracture,and copper surface microstructure with super-hydrophobic characteristics.Use ABAQUS software to complete the simulation of micro-milling processing,and carry out the simulation analysis of the minimum cutting thickness and tool fracture,and then carry out the micro-structure processing related experiments on the copper surface.Because the microstructure is a prerequisite for the superhydrophobic properties of the surface of the object,the superhydrophobic properties are studied on the basis of micromilling processing.First,perform a simulation analysis on the micro-milling of copper.When using a ?0.15 mm micro-milling cutter and the milling depth reaches 0.9μm,it is found that there are some chips on the rake face,so the minimum cutting thickness of the copper workpiece is determined to be 0.9μm.When the feed rate is 30mm/min,the tool speed is 10000r/min,and the milling depth is greater than 0.03 mm,the tool breaks;when the milling depth is 0.02 mm and the tool speed is 10000r/min,it is within the range of30～150mm/min Changing the feed rate,the tool did not break;when the milling depth was 0.02 mm and the feed rate was 30mm/min,when the tool speed reached17000r/min,the tool broke.The range analysis of the simulation data shows that the milling depth has the greatest impact on the fracture of the micro-milling cutter,followed by the milling cutter speed,and the feed rate is the least affected.After the analysis of variance,the variance ratio of the milling depth is 1.68.The feed rate variance ratio is 0.644,and the tool speed variance ratio is 0.673.The result is the same as the range analysis.Then,a copper micro-milling experiment was carried out to verify the correctness of the minimum cutting thickness and the influence of cutting factors on the tool fracture,and a better quality copper surface microstructure was processed.Finally,the super-hydrophobic properties of the surface microstructure of the copper micro-milling process are analyzed,and it is concluded that as the groove width increases,the contact angle increases;as the protrusion width increases,the contact angle first increases and then decreases Phenomenon;as the groove depth increases,the contact angle first increases,then decreases and then increases.