Junda Sandblasting machine and Junda shot peening machine are two different equipment. Although the name is similar, there are great differences in use. However, in order to avoid user choice error, affect the use and cause cost waste, the corresponding differences are introduced next.
1, the difference between shot blasting and sandblasting
The principle of shot peening and sandblasting is a way to clean the surface of the product using air as the power. Shot peening uses a metal abrasive, such as steel shot, steel sand, ceramic shot. Sand blasting is used by non-metallic abrasives, such as corundum sand, glass sand, resin sand and so on.
2, Junda shot blasting and sandblasting process
Shot peening and sandblasting process is based on different products, performance and other requirements to determine whether to use shot peening or sandblasting.
3. Selection of shot blasting and sand blasting equipment
Shot peening and sandblasting in addition to abrasive, abrasive recovery, abrasive sorting device is different, other equipment devices are the same, of course, small particles of abrasive can also be general and sandblasting equipment, of course, depends on the actual situation.
4. Shot peening is a method of removing metal rust by using compressed air or mechanical centrifugal force as power and friction. The diameter of the projectile is between 0.2-2.5mm, the compressed air pressure is 0.2-0.6mpa, and the Angle between the jet and the surface is about 30-90 degrees. The nozzles are made of T7 or T8 tool steel and hardened to a hardness of 50-. The service life of each nozzle is 15-20 days. Shot peening is used to remove scale, rust, molding sand and old paint film from medium and large metal products with thickness not less than 2mm or casting and forging parts which do not require accurate size and contour. It is a cleaning method before surface coating (plating). Widely used in large shipyards, heavy machinery factories, automobile factories and so on. Surface treatment with shot peening, striking force, cleaning effect is obvious. But shot peening of thin plate workpiece processing, easy to make the workpiece deformation, and the steel shot hit the workpiece surface (whether shot blasting or shot peening, the metal base material deformation, because and no plastic, broken peel, and oil film deformation with the base material, so with oil workpiece, shot blasting, shot peening can not completely remove oil.
5, sandblasting is also a mechanical cleaning method, but sandblasting is not shot blasting, sandblasting is sand such as quartz sand, shot blasting is metal pellet. In the existing workpiece surface treatment methods, the cleaning effect of sand blasting cleaning. Sandblasting is suitable for cleaning the workpiece surface with higher requirements. However, China’s current general sand blasting equipment is mainly composed of hinge, scraper, bucket elevator and other primitive heavy sand transport machinery. Users need to build a deep pit and do waterproof layer to install machinery, construction costs are high, maintenance and maintenance costs are larger. With the national attention to environmental protection and industrial health, because sandblasting process has a large number of dust generation not only serious pollution of the environment, but also easy to lead to the occupational disease of the operator (silicosis), has a large number of shot blasting to replace sandblasting.
The above is about the difference between sand blasting machine and shot peening machine, according to its introduction, we can more clearly understand the scope of application and use characteristics of the equipment, so as to play its use efficiency, to meet the needs of use.
Post time: May-25-2022
