基于喷炬新模型的圆弧面涂层厚度分布及仿真研究

Coating Thickness Distribution of an Arc and its Simulation Based on The New Model of Spray Gun

分析了喷涂的特点,提出了一种接近实际喷射图样的数学模型来描述涂料的空间分布;基于复杂曲面曲率较大处涂层厚度均匀性的问题,提出了用圆弧面拟合逼近的思想来对复杂曲面进行分片规划,从而用圆弧面上的涂层分布来近似表示曲率较大处的涂层分布;从上述模型出发,结合圆弧面的几何特征又建立了圆弧表面上的涂层生长速率模型及涂层厚度分布方程;为了保证平面和圆弧面上涂层厚度的均匀性,又给出了涂层厚度均匀性的优化方案。

We first analyse the feature of spray and present a mathematical model which is close to the actual situation of the jet of the coating. Based on the uniformity of coating thickness on greater curvature section of a complex surface, we propose the idea of crown face fitting for complex surface subdivision planning, thus use the circular surface coating distribution for describing the greater curvature section coating distribution. By the above function, and according to the circular geometry of the surface characteristics, we derived the coating growth rate model of arc and the thickness of the coating distribution equation. In order to satisfy the material uniformity requirements, we put forward a prioritization scheme of the material uniformity. Simulation studies show the practicability of the model and feasibility of the optimization.