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​What are the recommended process parameters for shot blasting?

What are the recommended process parameters for shot blasting?

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The recommended process parameters for shot blasting can vary depending on the specific application, equipment, and desired surface finish. However, the following general guidelines are commonly used:

Parameter

Description

Recommended Range

Shot Blasting Distance

Distance from the nozzle to the workpiece surface.

100 - 300 mm

Shot Blasting Angle

Angle between the abrasive jet axis and the workpiece surface.

60 - 75 degrees (avoid 90 degrees)

Abrasive Type

Type of abrasive media used (e.g., steel shot, glass beads, etc.).

Varies by application

Air Pressure

Compressed air pressure used to propel the abrasive.

Pressure blasting: 0.3 - 0.5 MPa<br>Suction blasting: 0.5 - 0.6 MPa

Nozzle Aperture

Diameter of the blast nozzle.

8 - 15 mm

Abrasive Particle Size

Size of the abrasive particles.

Varies by application; finer particles for smoother surfaces

Blast Wheel Speed (for wheel blasting)

Speed of the centrifugal blast wheel.

Typically 65 - 110 m/s

Blast Time

Duration of the shot blasting process.

Controlled based on surface requirements

Additional Considerations:

Surface Condition: The initial condition of the surface (e.g., rust, scale, coating) will affect the required intensity and duration of the shot blasting process.

Equipment Type: The choice between compressed air blasting and centrifugal wheel blasting depends on the application. Centrifugal wheel blasting is generally more efficient for large-scale operations.

Safety and Environmental Regulations: Ensure proper ventilation and dust collection to comply with environmental regulations and protect operators.

These parameters should be adjusted based on the specific requirements of the job and the equipment being used.