The following are the main points to ensure the quality of aluminum parts processed by sandblasting machines:

- Equipment debugging:

- Ensure the spray gun atomization effect is good, adjust the nozzle diameter and air pressure of the spray gun, so that the abrasive can be evenly sprayed on the surface of the aluminum parts. For example, for finely processed aluminum parts, a smaller diameter nozzle should be selected, generally between 3-6mm, and the air pressure should be controlled at a lower level, about 0.3-0.4MPa, to achieve a delicate sandblasting effect.

- Adjust the speed of the conveying system of the sandblasting machine to match the sandblasting process. Too fast delivery speed will lead to inadequate processing, too slow may cause excessive processing. According to the size and processing requirements of aluminum parts, the transmission speed is generally adjusted between 0.5-2 meters per minute.

- Abrasive Management:

- Check the quality of abrasives regularly to remove impurities and broken particles. Impurities can affect the sandblasting effect and even scratch the surface of the aluminum parts. For example, every 10-20 hours of use, the abrasive should be screened to remove broken particles and other impurities that are less than 30% in diameter of the normal abrasive.

- Maintain the dryness of the abrasive, avoid the abrasive moisture which will affect the sandblasting effect and increase the risk of rust of aluminum parts. The abrasive can be regularly dried by drying equipment, and the drying temperature is controlled between 80-120 ° C, and the drying time is determined according to the humidity and quantity of the abrasive, generally 1-2 hours.

- Machining parameter control:

- Precise control of sandblasting time, too short time can not achieve the desired surface treatment effect, too long may cause excessive wear on the surface of aluminum parts. According to the material, thickness and surface requirements of the aluminum parts, the sandblasting time is generally adjusted between 10-60 seconds.

- Strictly control the sandblasting Angle, and keep the Angle between the spray gun and the surface of the aluminum part within a suitable range. Generally speaking, right-angle sandblasting can obtain the maximum cutting force, but it is easy to cause uneven surface; A smaller Angle (such as 30-45°) can achieve a smoother surface finish. According to the specific processing requirements, reasonable choice of sandblasting Angle.

- Environmental factors:

- Keep the processing environment clean to reduce the impact of dust and impurities in the air on the sandblasting process. Isolation areas can be set up around the sandblast machine and air purification equipment can be installed to ensure that the air quality of the working environment reaches the cleanliness level 3 or above of ISO 8502-3 standards.

- Control the temperature and humidity of the processing environment to avoid affecting the performance of abrasives and the surface quality of aluminum parts due to too high temperature or too low humidity. Generally, the working environment temperature is between 15-30 ° C and the relative humidity is not more than 60%.

- Quality inspection:

- In the process of processing, regular sampling inspection of aluminum parts to check whether the surface roughness, cleanliness and dimensional accuracy indicators meet the requirements. For example, the surface roughness meter is used to detect the surface roughness, which is required to reach between Ra0.8-Ra6.3μm (depending on different processing needs); Use a cleanliness test paper or instrument to check the cleanliness of the surface and ensure that no impurities such as oil and dust remain on the surface.

- Check the appearance of the processed aluminum parts to see if there are any scratches, pits, deformation and other defects. If there are defects, adjust the processing parameters or maintain the equipment in time.