Is sand blasting the same as shot blasting?

Shot blasting

Shot blasting is the use of high-speed centrifugal impeller to throw small steel balls or small iron balls out and collide with the surface of parts at high speed, so it can remove the air oxide layer on the surface of parts. In addition, the steel ball or iron shot collides with the part surface at a high speed, resulting in the distortion and deformation of the lattice constant of the part surface and the improvement of the surface strength. It is a way to remove the part surface. Shot blasting is often used to remove the casting surface or strengthen the part surface.

Generally, shot blasting is used in a standard way. Many grinding rods are together before and after, with high efficiency and little environmental pollution. Dalian sand blasting

Shot blasting and sand blasting are widely used in repair and shipbuilding industry. However, whether shot blasting or sand blasting, air compression is applied. Naturally, it is not shot blasting that requires high-speed centrifugal impeller. In the repair and shipbuilding industry, shot blasting (small steel ball) should be used in the preparation of thick steel plate (derusting before spraying); Sand blasting (stone sand is used in repair and shipbuilding) should be used in formed ships or sections. The effect is to remove the old paint and rust on the thick steel plate and spray it again. In the repair and shipbuilding industry, the key effect of shot blasting and sand blasting is to improve the adhesion of paint sprayed on thick steel plates.

In fact, the removal of iron castings is not just shot blasting. Generally, for large objects, roll barrel sand cleaning is carried out first, that is, remove the riser of iron castings and roll them in the roll barrel. The parts collide with each other in the roll barrel to remove most of the sand on the surface before shot blasting or shot blasting.

Sandblasting

Sand blasting is a way to blow out the quartz sand with high speed by air compression to remove the surface of parts. It is also called sand blowing in the processing plant. It can not only remove rust, but also remove oil. It is very effective for spraying. It is common to remove rust on the surface of parts; Surface decoration of parts (the small and medium-sized wet test sand blasting machine sold in the sales market is the main purpose. The sand grain is generally steel jade and the material is water); In the steel frame structure, the use of high-strength bolts for connection is an excellent way, because the high-strength connection uses the friction in the middle of the fusion surface to transfer the force, so the quality of the fusion surface is highly specified. At this time, it is necessary to use sand blasting to solve the fusion surface.

Stainless steel polishing is complicated in appearance, easy to be made by hand for rust removal, low efficiency, poor natural environment on the spot and uneven rust removal. The general sandblasting machine has sandblasting guns of various specifications and models. If it is not a particularly small shell, the gun can be installed and cleaned. The supporting facilities of high-pressure vessel - the cylinder adopts sand blasting method to eliminate the oxide scale on the surface of the product workpiece. The diameter of quartz sand is 1.5mm ~ 3.5mm.

One kind of production and processing is to use water as the medium to promote emery to produce and process parts, which is a kind of sand blasting.