Research on Spray Trajectory Atomization Based on Mathematical Analysis

The most important part of the spraying process is the paint film thickness uniform and how to plan the spray path. The paper is optimize the trajectory of spray gun by establishing mathematical model. Based on the analysis of the factors affecting the thickness distribution of paint film, establishing the thickness of single-trajectory spraying model, and analysis the relationship and surface geometry invariant to simplified the model, getting the optimal solution by using overlapping thickness model based on the movable surface, useing MATLAB to establish model of the curve surface. Then using projection to establish the thickness distribution model of any curve surface. Then use cloud sectioning to optimize the curve surface and establish the thickness of paint film in double trajectory. Introduction Glaze spraying process sprays glaze into the mist under compressed air with the glaze spray gun or glaze spray machine, so that the glaze adheres onto the clay body. It is a process easily realizing automation in the ceramic production process. As the uneven glaze will crack in the firing process, causing workpiece scrapping, so the thickness of the sprayed glaze in the spraying process is required to be uniform as far as possible. [1] In actual air spraying, compressed air is usually arranged on both sides of the spray gun mouth, the mist cone is squashed into an elliptical cone, the region on the plane covered by the spray cone formed by the paint mist is an ellipse, the thickness of paint film meets elliptic double β distribution model in the elliptic distribution region. Atomization pressure1, diaphragm pump pressure and spray distance h are the main factors affecting the above parameters, and they accord with model of the spray gun spraying at a single point.The thickness of paint film in the middle of the spraying areais is bigger than other areas.When moving the spray gun, the mist cone will overlap in the adjacent paths. The Cumulative Deposition Model of Single Channel Spraying Based on the proposed ellipse bibeta model, the thickness of any point S in the spray area is the accumulation of the coating thickness during the spray gun moving above the spraying model at the speed of v when it comes to reality. [2] As shown in Fig 1, we establish coordinates on the spray path, put the long axis of the elliptic region as X-axis, and the direction of the trajectory as Y-axis, which is in the same direction of elliptic spraying region. Figure 1. Schematic diagram of spraying trajectory on flat.