Year1
- 机器外形尺寸：
- 3000*1800*4402
- 最大吊重：
- 500KG
Shot blasting machine is a casting equipment that uses high-speed projectiles thrown by the shot blaster to clean or strengthen the surface of castings.
The shot blasting machine can simultaneously shake out sand, remove core and clean castings.
The shot blasting machine is a processing technology that uses a shot blaster to drop steel sand and steel shots at high speed and impact the surface of the material object. It is faster and more effective than other surface treatment technologies and can be partially retained or stamped after the casting process.
In the 1930s, an American company made the first shot blasting machine in the world. The production of shot blasting strengthening equipment in China began in the 1990s, mainly imitating the technology of the former Soviet Union.
Shot blasting machines can also be used to remove burrs, scale and rust that may affect the integrity, appearance, or definition of parts of an object. The shot blasting machine can also remove surface contaminants from the surface of a partial coating and provide a surface profile that increases the adhesion of the coating to strengthen the workpiece.
The shot blasting machine is different from the shot blasting machine in that it is used to reduce the fatigue life of the parts, increase different surface stresses, increase the strength of the parts, or prevent fretting.
Scope of application
Surface cleaning
Shot blasting equipment is first used to remove sand and oxide scale on the surface of cast steel and iron castings in the foundry industry.
Almost all steel castings, gray castings, malleable steel parts, ductile iron parts, etc. need to be shot blasted. This is not only to remove oxide scale and sand on the surface of castings, but also is an indispensable preparation process before quality inspection of castings. For example, large gas turbine casings must undergo strict shot blasting before non-destructive testing to ensure the accuracy of the testing results. reliability. In general casting production, shot blast cleaning is an indispensable process to find surface defects of castings such as subcutaneous pores, slag holes, sand sticking, cold insulation, peeling, etc. The surface cleaning of non-ferrous metal castings, such as aluminum alloys, copper alloys, etc., in addition to removing oxide scale and discovering surface defects of the castings, is more mainly to use shot blasting to remove burrs of the die castings and obtain surface quality with decorative significance. , to obtain comprehensive effects. In metallurgical steel production, shot blasting or pickling is a combined mechanical or chemical removal process to ensure high productivity in mass production of steel. In the production of silicon steel sheets, stainless steel sheets and other alloy steel plates and strips, the cold rolling process must be annealed and then shot blasted or pickled to ensure the surface roughness and thickness accuracy of the cold rolled steel plates.
Workpiece Strengthening
According to modern metal strength theory, increasing the dislocation density inside the metal is the main direction to improve the strength of the metal. Practice has proven that shot blasting is an effective process for increasing metal dislocation structures. This is of great significance for some metals that cannot undergo phase transformation hardening (such as martensitic quenching, etc.) or workpieces that require further strengthening on the basis of phase transformation hardening. Aviation, aerospace industry, automobiles, tractors and other parts require lightweighting, but reliability requirements are getting higher and higher. An important process measure is to use shot peening process to improve the strength and fatigue strength of components.
According to the structure of the casting carrier, shot blasting machines are divided into drum type, chain plate type, turntable type, trolley type, squirrel cage type and hanging type shot blasting machines.
Drum type and chain plate shot blasting machines are suitable for cleaning small and medium-sized castings that are not afraid of collision. The drum-type shot blasting machine relies on the spiral guide ribs in the barrel to flip the casting over and move forward. The chain plate shot blasting machine uses the movement of the chain plate to flip and run the castings. Rotary-type, trolley-type and hanging-type shot blasting machines are used to clean large and medium-sized castings. They usually have a fixed shot blasting chamber, and the cleaned castings rotate or move in the shot blasting chamber. The shot blasting room is generally equipped with several shot blasters, installed in different positions, to project projectiles from different directions to improve the cleaning efficiency and cleaning quality of the shot blasting machine. The hanging shot blasting machine can be equipped with several hooks on the catenary according to the needs of the castings to be cleaned. During cleaning, the castings are hung on the hooks and turn over on their own while running forward. Castings are loaded and unloaded outside the shot blasting room and cleaned indoors.
According to the working system, it can be divided into intermittent and continuous shot blasting machines.
The shot blasting machine is mainly composed of the following components:
① The shot blasting machine generally uses a high-speed rotating impeller to project the projectiles in a certain direction under the action of high centrifugal force. During the working process, some shot blasters can swing at a certain angle or move up and down.
② Projectile collection, separation and transportation system.
③The carrier body that enables the castings to continuously run and flip during the shot blasting cleaning process.
④Dust removal system.
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