Optimal Design for the Structure Parameters of Long Raster Engraving Air-floating Platform
Keywords:Air-floating platform, Finite element, Orthogonal test, Loading capacity, Air consumption.
Air-floating platform is the core component of long raster engraving system. In order to design an air-floating platform to greatly meet the demands of long raster engraving, this paper, based on the validation of simulation model accuracy by test platform, proposes a three-dimension finite element model about gas film, and investigates the influence of the gas film thickness, air pressure and width of bottom guideway on the loaded capacity and air consumption by orthogonal test method. Then the best design plan of air-floating platform structure was determined by range analysis method. The results showed that air film thickness H=0.02 mm, gas supply pressure Ps=0.15 MPa, width of bottom guideway Bx=140 mm, the loading capacity of single-sided guideway is about 3177 N, its air consumption is 191487 mm3/s. Hence, this plan can not only meet the requirements of the loading capacity but also reduce air consumption of air-floating platform so as to provide a basis for optimum structure design about air-floating platform.