Abstract
The manufacturing of precise surface microstructures with low cost is needed for surface texturing-based surface engineering. In this paper, a device for the fabrication of surface microgroove texture on stainless steel based on ultrasonic impact peening (UIP) is proposed and investigated. First, the principle of applying the UIP into the fabrication of surface texture is analytically described. Then, the design of the UIP device, particularly the design of functional systems and mechanical structures, is carried out. Next, a UIP experimental device is built, and is further applied to fabricate microgroove textures on 316L stainless steel. The subsequent experimental characterization of microgroove morphology demonstrates the feasibility of the designed UIP device for the fabrication of stainless steel surface texture.
Highlights
The principle of applying the ultrasonic impact peening (UIP) into the fabrication of surface texture is analytically described
Experiment by UIP systems and mechanical structures, a UIP-based device is built for the fabrication of surface texture on stainless steel
According to the design scheme of the functional systems and mechanical structures, UIP processing, the vertical displacement of the impact ball is adjusted to enable it close to a UIP-based device is built for the fabrication of surface texture on stainless steel
Summary
The impact ball with ultrasonic mechanical vibration feeds vertically to workpiece surface. Under the action of ultrasonic mechanical vibration, the surface of stainless steel workpiece produces severe elastoplastic deformation, which results into the formation of point-like texture. In combination with the use of a motion control system to precisely control the trajectory of the workpiece, it is expected that complex-shaped textures such as microgrooves can be formed on stainless steel surface. Where r represents the radius of impact ball, h and w represents the depth and width of the single texture fabricated, respectively. It can be deduced from the geometric relationship that the texture fabricated by UIP is a kind of shallow texture with a small ratio of depth to width. The detailed analysis can be found in elsewhere [35]
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