The water adhesion of a superhydrophobic surface depends on its surface microstructure and chemical composition, which in turn affects its tribological properties. In this paper, a simple and environmentally friendly method was employed to fabricate superhydrophobic aluminium surfaces with different water adhesion. The results confirmed that the superhydrophobic aluminium surfaces with different water adhesion had different tribological properties under dry friction and water lubrication conditions. The sticky superhydrophobic sample with high adhesion had better wear resistance and lower friction coefficient than the slippery superhydrophobic one with very low adhesion. In addition, the related tribological properties were analyzed. This study is helpful to understand the tribological properties of superhydrophobic surfaces with different water adhesion more clearly, which is of great significance for their practical application.
This paper brings a new method of adaptive control with constant pressure on large-scale surface grinding machine. The existing problem of uneven in the process of abrasive belt grinding on titanium alloy composite plates is solved effectively. And the grinding head and the belt follow the plate surface ups and downs effectively through contacting the workpiece with the constant pressure. Not only did ensure the grinding depth and the size of the titanium alloy plates, but also improved the surface processing quality. After experiment, the satisfactory control effect was obtained. The research results have some practical value on adaptive control theory and industrial practice.
An investigation was reported on how to improve the machinability of PCBN tool for
realizing the electric spark line cutting of PCBN tool. The machinability of the PCBN tool was
evaluated in terms of its current conductivity. The influences of the additive compositions, additive
concentrations and grit sizes of CBN on the current conductivity of PCBN tool were discussed
through manufacturing PCBN tool. Experimental results indicated that the machinability of PCBN
tool was attributed to the mesh structure of current-conducting additive, which was the combined
effects of high additive concentrations and fine CBN grits.
The method of abrasive belt finishing slender piston rod was proposed in this paper, which based on low surface roughness weaknesses of low rigidity slender piston rod in the grinding process. And the ralation between the surface roughness and the grinding parameters was analyzed by the experiment research. The research result has a reasonably guidance for the actual manufacturing process.
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