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The difference between the sand blasting and blasting
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Blasting is the use of high-speed rotating impeller pills for the small steel or iron casting out high speed impact parts surface, so it can remove the oxide layer on the surface of the parts. Pills for steel or iron, at the same time high speed impact parts surface, cause the deformation of lattice distortion on the surface of the parts, the surface hardness is higher, it is a kind of method to clean the surface of the metal parts, casting surface blasting are commonly used to clean up, or to strengthen the part surface.
The general rules of blasting is used to shape and so on, a few head left and right sides together, under the high efficiency and low pollution.
Repair, shipbuilding, shot blasting, sand blasting is widely used. But being shot or sand, were used in the form of compressed air. Of course not shot is to use high-speed rotating impeller. In repair, shipbuilding industry in general, blasting (small steel balls) multi-purpose in steel plate pretreatment (cleaning before coating); Sandblasting (repair, shipbuilding industry with ore) multi-purpose in the shape of the ship or section, is used to get rid of the old paint and rust on sheet metal, coating again. In repair, shipbuilding, shot blasting, sand blasting, the main effect is to increase steel plate coating adhesion of the paint.
Clean up not just using the shot, actually casting roller deoxidization for big first commonly, is the riser after resection of the casting is put in the drum roll, the parts inside the drum collided with each other, the sand on the surface of the most clear first and then to blasting or peening.
Blasting balls size is 1.5 mm.
Research shows that in terms of damage, and metal materials surface tensile stress is easier than compressive stress, when the surface is compressive stress, the fatigue life of material is greatly increased, therefore, for easy to fatigue fracture axial parts usually adopt shot peening forming surface compressive stress, increase product life, in addition, the metal is sensitive to tensile metal materials, this is the tensile strength of the material is larger than that of low compression strength of reason, it is also a general metal materials with the tensile strength (yield, tensile) show that the performance of materials.
Our daily working face of car steel shot peening is used to strengthen, can significantly improve the fatigue strength of materials.
Blasting is a body with a motor to drive the impeller rotation, by the effect of centrifugal force, the diameter is 0.2 ~ 0.2 balls (have pills for casting, cut shots and stainless steel, etc.) to the surface of the workpiece, the workpiece surface reaches a certain coarse degree, makes the artifact as beautiful, or change the workpiece welding tensile stress to compressive stress, improve the service life of the workpiece. Almost most areas for machinery, shipbuilding and ship repairing, auto parts, aircraft parts, guns tank surface, Bridges, steel structure, glass, steel, pipe, and so on. Sandblasting (pill) is using compressed air as power to sand diameter in 40 ~ 120 purpose or about 0.1 ~ 2.0 pill is sprayed to the surface of the workpiece, the workpiece to achieve the same effect. Pill grain size is different, to achieve the treatment effect is different. Emphasis is put forward: shot peening can also play the role of reinforcement. Now the domestic equipment into a myth, that can only achieve the goal of strengthening blast. The United States \ Japan's enterprises to strengthen the shot peening of! Each have each advantage. Such as artifacts, such as gear Angle shot out pills can't change, can only be changed with frequency conversion velocity. But its processing quantity is large, fast, the shot peening is just on the contrary, the effect of blasting is not as good as the effect of shot peening
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