What is the purpose and function of shot blasting machine?

The shot blasting machine for workpiece cleaning is a use of the centrifugal force of shot blasting machine will be shot 78m/s high-speed distance projection to the workpiece surface. The process is not subject to the size, shape, and weight of the workpiece to be cleaned, instead of the traditional chemical rust. Small to screws, nuts, large to train cars, 10,000-ton ship shell; Simple to a flat plate, complex to engine cylinder cooling jacket; As light as a few grams, weight to million tons, can be solved by shot blasting process.

When the parts are shot blasted, the equipment can make the parts in the projectile flow constantly replace the surface to achieve uniform shot blasting. So it called shot blasting equipment, or shot blasting machine. Because of the workpieces are varied, so there are many kinds of shot blasting machines of qinggong MACHINERY(QGMA) shot blasting machine. QGMA's professional overseas market analysis and professional technical team design and produce professional shot blasting machine products a certain specification of shot blasting equipment, only applicable to a certain range of parts cleaning. And special equipment is suitable for one type of part.

Formally speaking, steel shot is obtained by mechanical method high speed and long distance projection to the surface of parts, collectively known as shot blasting cleaning. It includes: shot blasting to the casting with sand, emoving the shot blasting sand of molding sand and molding core; shot blasting to the casting, forging, welding and heat-treated parts to remove the black skin, nodulation, oxide film, rust spots, etc.; shot blasting to the steel plate and various H-shaped steel surface and other parts, after the shot blasting machine eliminates the stress of the workpiece, which is very good for the subsequent anti-corrosion process. The spring, plate spring and gear bearing variable stress were strengthened, and the shot blasting was strengthened to eliminate stress and improve surface fatigue strength. The surface of decorative parts or tableware of household appliances is enhanced color by shot blasting. However, in terms of process classification, shot blasting is only a kind of cleaning process for the purpose of removing casting, forging, welding and heat-treated parts, which is the concept of shot blasting. And for the projectiles shot to the surface of the workpiece to achieve the purpose of the relevant process, it is directly named with its process requirements, such as: shot blasting sand, shot blasting strengthening, shot blasting color, in order to be different from shot blasting cleaning process.

The principle of shot blasting is based on the high-speed projectile hitting the surface of the shot blaster parts, making them deform locally and producing shot indentation. Each shot indentation has three distinct layers of structure. That is, the surface of the parts brittle deformation layer; the substrate plastic deformation zone in the middle part; deep elastic deformation zone. The three effects are as follows: ① the compression stress is produced from five directions to the front, back, left, right and up of the plastic zone in the middle layer; ② the compression deformation is produced in five directions to the middle layer and pushed to the surface layer in an instant, so that the brittle layer with fracture line falls off rapidly; ③almost at the same time to push the projectile to produce a rebound, so that its rebound speed and rebound out. The three areas of the bullet indentation occur and exist at the same time.

In order to make the brittle layer brittle fracture, it is necessary to reach the brittle failure deformation, so the appropriate depth of indentation is required, then there must be an appropriate amount of plastic deformation zone. There is an intermediate state of elastic zone between the plastic zone and the matrix. General shot blasting is only required to destroy its surface appendages, make it fall off, the less brittle matrix, the better. Therefore, we must reasonably choose the shot blasting machine expert around you.