What are the factors that affect the quality of sandblasting processing in Dalian?

Dalian sandblasting processing, as an important surface treatment technology, plays an irreplaceable role in modern industrial production. It can not only efficiently clean and strengthen the surface of workpieces, but also meet diverse processing needs. With the continuous advancement of technology, sandblasting processing will be applied in more fields, providing higher quality services for industrial manufacturing.

Sandblasting equipment typically consists of a compressed air system, abrasive storage tank, nozzle, and control system. Compressed air carries the abrasive out of the storage tank and sprays it at high speed onto the surface of the workpiece through a nozzle. High speed abrasive particles collide with the surface of the workpiece, removing impurities such as oxide layer, rust, oil stains, burrs, etc. Meanwhile, the cutting effect of abrasives can alter the surface roughness, making it more uniform.

What are the factors that affect the quality of sandblasting processing in Dalian?

The selection of abrasives: Different types, particle sizes, and hardness of abrasives will have a significant impact on the sandblasting effect. For example, abrasive materials with high hardness, such as silicon carbide, have strong cutting ability and can quickly remove impurities, but may result in larger surface roughness; Glass beads with softer texture have less damage to the surface of the workpiece, and can achieve uniform surface roughness and good glossiness, but their ability to remove impurities is relatively weak. The particle size of the abrasive is also crucial. The finer the particle size, the lower the surface roughness after sandblasting, and vice versa.

Sandblasting pressure: Sandblasting pressure determines the speed and impact force of abrasive sprayed onto the surface of the workpiece. The greater the pressure, the greater the kinetic energy of the abrasive, and the stronger the ability to remove impurities. However, it may also lead to an increase in surface roughness and even cause problems such as excessive sandblasting and deformation of the workpiece. For workpieces of different materials and thicknesses, it is necessary to choose the appropriate sandblasting pressure. Generally speaking, workpieces with higher hardness and thickness can withstand higher sandblasting pressure, while workpieces with lower hardness or thinner require lower pressure.

Sandblasting distance: The distance between the spray gun and the surface of the workpiece will affect the dispersion and impact force of the abrasive. If the distance is too close and the abrasive is concentrated in a small area, the impact force is too strong, which can easily cause excessive sandblasting on the local surface; If the distance is too far and the abrasive is dispersed, the impact force will be weakened, which will reduce the sandblasting efficiency and may lead to uneven surface sandblasting. Usually, the appropriate sandblasting distance is between 100-300mm, and the specific value needs to be adjusted according to factors such as the shape, size, material, and performance of the sandblasting equipment of the workpiece.

Spray gun angle: The angle between the spray gun and the surface of the workpiece also has a significant impact on the quality of sandblasting. Generally speaking, the spray gun should be perpendicular to the surface of the workpiece, so that the abrasive can be evenly sprayed onto the surface of the workpiece and achieve a uniform sandblasting effect. If the angle of the spray gun is tilted, the abrasive will impact the surface of the workpiece at a certain angle, causing uneven sandblasting on the surface, and may result in excessive sandblasting at the edges or corners of the workpiece.

Sandblasting time: The length of sandblasting time directly affects the degree of surface treatment of the workpiece. If the sandblasting time is too short, it may not be possible to completely remove impurities from the surface and meet the expected cleanliness and roughness requirements; If the sandblasting time is too long, it may lead to excessive sandblasting on the surface, causing the surface roughness to exceed the required range, and even affecting the dimensional accuracy and surface performance of the workpiece. Therefore, it is necessary to control the sandblasting time reasonably based on the initial state of the workpiece and processing requirements.

Workpiece material and surface condition: Workpieces of different materials have different responses to sandblasting processing. For example, metal materials with high hardness, such as stainless steel, alloy steel, etc., require the use of abrasives with high hardness, strong cutting ability, and greater sandblasting pressure to achieve good machining results; For materials with lower hardness, such as aluminum alloys, plastics, etc., relatively mild abrasives and lower sandblasting parameters need to be selected to avoid surface damage. In addition, the initial surface condition of the workpiece is also important. If there are oil stains, rust, or other impurities on the surface, it will affect the contact between the abrasive and the workpiece surface, reducing the sandblasting effect. Therefore, sufficient pre-treatment of the workpiece is necessary before sandblasting to ensure surface cleanliness and dryness.

Equipment performance and maintenance: The performance of sandblasting equipment is directly related to the quality of sandblasting processing. The quality and working condition of components such as spray guns, nozzles, sand pumps, and air compressors in equipment can affect the spraying effect of abrasives. For example, severe nozzle wear can lead to uneven abrasive spraying, affecting the quality of sandblasting. Therefore, it is necessary to regularly maintain and upkeep sandblasting equipment, replace worn parts in a timely manner, and ensure that the equipment is in good working condition. At the same time, the degree of automation of the equipment will also have an impact on the processing quality. Equipment with high automation can control sandblasting parameters more accurately, ensuring the stability of processing quality.

Sandblasting processing is a surface treatment technique widely used for surface cleaning, deburring, strengthening, and decoration of materials such as metals, plastics, glass, ceramics, etc. The principle is to use high-speed abrasive particles to remove surface impurities, oxide layers, or burrs through impact force, thereby achieving the goal of improving surface quality.

In mechanical manufacturing, sandblasting is commonly used to clean the oxide scale and burrs on the surface of castings and forgings, providing good surface conditions for subsequent processing. Sandblasting processing is used for surface treatment of automotive components, such as engine cylinder blocks, gearbox housings, etc., to improve their strength and wear resistance. In the aerospace field, sandblasting is used to strengthen key components such as aircraft engine blades and landing gear, and improve their fatigue life.