Many friends have purchased a shot blasting machine and the cleaning effect is not ideal. What should people do? Let people not consider the quality problems of shot blasting machine manufacturers, consider the five factors that affect the cleaning effect of shot blasting machines, and find solutions for the cleaning effect of shot blasting machines according to the following five points.

1. Size of shot blasting: The larger the steel shot (shot blasting), the greater the impact kinetic energy and the greater the shot blasting strength, but the coverage rate of the steel shot decreases. Therefore, while ensuring the shot blasting strength, the smaller shot blasting should be used as much as possible. In addition, the shot size is limited by the shape of the part. When there is a groove on the part, the diameter of the shot (peening) should be less than half of the inner radius of the groove. The particle size of the throwing (peening) shot is often selected between 6 and 50 meshes.

Second, the hardness of shot blasting: when the shot blasting hardness is higher than the hardness of the parts, the change of its hardness value does not affect the shot blasting strength; when the shot blasting is softer than the parts, if the shot blasting hardness value decreases, the shot blasting strength also decreases.

3. Shot blasting speed: When the shot blasting speed increases, the shot blasting strength also increases, but when the speed is too high, the shot blasting damage also increases.

4. Projection angle: When the shot blasting jet is perpendicular to the surface to be sprayed, the shot blasting intensity is the highest, so it should generally be kept in this state for shot blasting. If limited by the shape of the parts, when small angle shot peening must be used, the shot peening size and speed should be appropriately increased.

5. The amount of shot blasting: the kinetic energy of the shot blasting fragment is low, the more shot blasting is broken, the lower the shot peening strength, and the irregular shot will scratch the surface of the part, so the shot should be removed frequently to ensure that the blasting (throwing) ) pill integrity rate greater than 85%. The shot blasting equipment is basically the same, only some auxiliary devices are used to control the shot blasting process more strictly.

original source: https://www.puhuamachine.com/news/

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