A comprehensive comparative analysis of shot peening and shot blasting surface treatment processes

　　Features of shot peening: High flexibility. Shot peening uses compressed air as a power source, so it can flexibly process the inner and outer surfaces of complex workpieces and the inner walls of pipes, and the equipment is movable and has a wide range of applications. Simple equipment and low initial investment. Shot peening equipment may have a simpler structure than shot blasting, and the initial investment cost is low. High energy consumption. Shot peening requires the support of a high-power air compressor station, which consumes a lot of energy. Surface moisture and rust problems. After shot peening, moisture may remain on the surface of the workpiece, increasing the risk of rust and requiring timely treatment. Efficiency and labor intensity. Shot peening has relatively low efficiency and may require more operators and high labor intensity, especially for complex workpieces.

　　Features of shot peening: Flexibility and dead angle problems. Shot peening is usually more efficient when processing large workpieces because it usually uses fixed equipment, but it may be difficult to reach the inside of complex workpieces or specific angles, and there are cleaning dead angles. No air compressor station is required. Correct, shot peening does not rely on compressed air, does not require a high-power air compressor station, and has higher energy efficiency than shot peening. Surface state. After shot blasting, moisture is not easy to remain on the surface of the workpiece, reducing the risk of rust. Equipment complexity and maintenance cost. The structure of the shot blasting machine is relatively complex, and the replacement frequency of wearing parts such as blades may be high, and the maintenance cost and time will increase accordingly. Efficiency and automation. Shot blasting has high efficiency, is suitable for mass production, is easy to realize automatic control, and reduces long-term operating costs.

　　The difference between shot peening and shot blasting: power source. Shot peening usually uses high-pressure wind or compressed air as a power source to accelerate the shot to hit the surface of the workpiece; while shot blasting uses a high-speed rotating flywheel (the blade wheel in the shot blasting machine) to project the shot onto the workpiece at a high speed. Efficiency and flexibility. Shot blasting usually provides higher processing efficiency due to its mechanism, and is particularly suitable for large-area and relatively simple-shaped workpieces. Shot peening is more flexible and can handle complex-shaped workpieces more carefully, but due to its large power consumption, the efficiency is relatively low. Control accuracy and dead angle. Shot peening is easier to control the processing accuracy due to its better pressure adjustability, and is suitable for small and complex workpieces with high precision requirements. During shot blasting, since the shot is thrown by a flywheel in a fixed direction, dead corners that cannot be processed may be formed in the corners or depressions of certain structures of the workpiece.