Speed of the polishing steel brush machine on the polishing effect

The speed of the polishing steel brush machine has a crucial influence on the polishing effect, which is mainly reflected in the following aspects:

Cutting capacity and material removal rate

Higher speeds can enhance cutting ability and increase material removal rates. When the speed is increased, the abrasive on the surface of the polishing wheel contacts the steel surface more frequently, and the abrasive impacts and cuts the microscopic protrusions on the steel surface more violently. For example, when rough polishing steel with thick oxide layers or rough processing marks, high speeds can quickly smooth the surface and remove these defects. However, too high a speed may cause over-cutting, resulting in deeper scratches on the steel surface and affecting surface flatness.

At lower speeds, the abrasive has a relatively gentle cutting effect on the steel, and the material removal rate is slow. This situation is suitable for the fine polishing stage, such as the final polishing of the surface of precision mechanical parts. Lower speeds combined with fine-grained abrasives can finely grind the steel surface to make the surface smoother.

Surface roughness

The rotation speed directly affects the surface roughness of the steel after polishing. At high rotation speeds, the abrasive does not have enough time to polish the surface finely due to the short contact time between the abrasive and the steel surface, and it is easy to leave rough marks. On the contrary, low rotation speeds allow the abrasive to have more time to roll and grind on the steel surface, which can obtain a smoother surface. For example, when polishing decorative stainless steel sheets, in order to achieve a mirror effect, the rotation speed is usually reduced in the last few polishing processes.

Polishing heat generation and material deformation

Too high a speed will generate more heat. During the polishing process, the friction between the abrasive and the steel will generate heat. The faster the speed, the more intense the friction, and the more heat will be generated. For some heat-sensitive steels, excessive heat may cause the material to deform. For example, when polishing some thin steel products, the heat generated by high speed may cause the steel to warp, affecting the product quality. Properly reducing the speed can reduce heat generation and reduce the risk of material deformation.

Abrasive wear and service life

Rotational speed also affects the rate of abrasive wear. At high speeds, the abrasives bear greater centrifugal force and friction, and are more likely to fall off and wear. This shortens the life of the abrasive and increases polishing costs. Reasonable control of the rotation speed can ensure the polishing quality and prolong the service life of the abrasive.