1. Vibration polishing process principle and brass accessories characteristics
Vibration polishing is a process that uses the relative movement between the abrasive and the workpiece in the vibration container to achieve surface treatment. During the vibration polishing process of brass accessories, the brass accessories are placed in the container of the vibration polisher together with specific abrasives. Brass has good ductility and a certain hardness, and its surface undergoes microscopic plastic deformation and material removal under the continuous friction and impact with the abrasive. The vibration polishing machine generates high-frequency vibrations to make the abrasive move in a complex trajectory in the container, contacting the surface of the brass accessories in all directions, thereby gradually changing the surface state of the accessories.
2. Initial shaping of surface texture
In the early stage of vibration polishing, the abrasive rough-polishes the surface of the brass accessories. Abrasives with coarser particles can quickly remove processing marks, oxide layers, and some raised defective parts on the surface of the brass accessories. At this time, a relatively uniform micro-texture begins to form on the surface of the accessories, and the directions of these textures are relatively messy, which is the result of the random action of the abrasive. For example, the turning lines that originally existed on the surface of brass accessories will gradually be smoothed, and replaced by a texture composed of countless tiny scratches, which makes the glossiness of the accessories surface begin to improve, but the overall texture still presents a matte and relatively rough texture, but it has been significantly improved compared to before polishing.
3. Texture refinement and glossiness improvement stage
As the polishing time increases, gradually replace the abrasive with finer particles for medium polishing and fine polishing. In the medium polishing stage, the abrasive continues to polish the surface, so that the texture formed by the previous rough polishing is further refined, and the scratch depth becomes shallower and the width becomes narrower. In the fine polishing stage, the extremely fine abrasive gently slides over the surface of the brass accessories to further remove the subtle flaws on the surface. The previous texture becomes more delicate and uniform, and begins to have directionality to a certain extent. The glossiness of brass accessories is significantly improved, gradually showing a soft metallic luster. At this time, the surface texture is characterized by fine and regular line arrangement at the microscopic level. These lines extend slightly along the main direction of the abrasive movement, so that the surface of the accessories will have slight light and shadow changes when observed at different angles, which increases its beauty.
4. The role of vibration polishing process parameters on texture shaping
The parameters of the vibration polishing process, such as vibration frequency, amplitude, polishing time, and abrasive types and ratios, have a key influence on the shaping effect of the surface texture of brass accessories. Higher vibration frequency and amplitude can make the collision between the abrasive and the surface of the accessories more intense, which may accelerate the texture shaping process in the same time, but if the parameters are set too high, it may cause excessive wear or even deformation of the surface of brass accessories. The length of polishing time determines the degree of texture refinement. If the time is too short, the ideal texture effect and glossiness cannot be achieved. If the time is too long, it may cause unnecessary waste of resources and may affect the dimensional accuracy of the accessories. Different types of abrasives (such as aluminum oxide, silicon carbide, etc.) and their ratios will produce different cutting capabilities and polishing effects. Reasonable selection of abrasive parameters can accurately control the morphology, depth and glossiness of the surface texture of brass accessories, thereby meeting different product design and application requirements.
