1. Powerful Cleaning and Impurity Removal Ability
Shot blasting can efficiently eject projectiles to clean impurities over large areas, while sandblasting uses high - pressure airflows to propel abrasives to delicately remove stubborn dirt, oil stains, rust, and old coatings. Whether it is large - scale oxide scale or impurities in the gaps and holes of complex structures, they can be effectively removed, ensuring that the workpiece surface reaches a high level of cleanliness. This provides an excellent foundation for subsequent processes such as painting, welding, and bonding. For example, in the treatment of steel - structure bridge components, all kinds of impurities formed during processing and storage on the surface can be thoroughly removed.
2. Precise Surface Topography Shaping
On one hand, shot blasting causes plastic deformation on the surface through the impact of projectiles. On the other hand, sandblasting can adjust the surface roughness using abrasives of different particle sizes. The combination of the two can precisely shape the desired surface topography. It can not only form a certain residual compressive stress layer on the surface through shot blasting to strengthen the surface but also obtain an appropriate roughness through sandblasting to enhance the coating adhesion or meet special functional requirements. For example, in the treatment of aero - engine blades, it can not only improve the surface strength of the blades but also make their surface roughness meet the requirements of aerodynamics.
3. Wide Adaptability to Materials and Workpieces
It is applicable to various metal and non - metal materials, as well as workpieces of different shapes and sizes. For large and heavy metal components, the high - efficiency cleaning advantage of shot blasting can be fully utilized. For fragile and complex - shaped workpieces, the flexibility of sandblasting can ensure the treatment effect. For instance, when treating special materials such as ceramic products and the casings of electronic components, or small and precision workpieces, the gentle treatment method of sandblasting can avoid damaging the workpieces. At the same time, combined with the strengthening effect of shot blasting, the overall performance can be improved.
4. Efficient and Economical Treatment Process
The combination of the high efficiency of shot blasting and the precision of sandblasting can complete high - quality surface treatment in a relatively short time, improving production efficiency. Moreover, most of the projectiles and abrasives can be recycled, reducing material costs. At the same time, this comprehensive treatment method can reduce subsequent rework or product quality problems caused by improper surface treatment, enhancing the overall economic benefits. For example, in the mass production of auto parts, the production cycle can be significantly shortened, and production costs can be reduced.
5. Good Environmental and Safety Characteristics
After being equipped with advanced dust - removal equipment, the dust generated during the shot - blasting and sand - blasting processes can be effectively collected and treated, reducing pollution to the working environment and the atmosphere. Also, operating in closed or semi - closed equipment can reduce the safety risks caused by the splashing of projectiles and abrasives, ensuring the personal safety of operators. Compared with some other surface - treatment processes, it poses less harm to the environment and personnel.