Most painting robots employ a 5- or 6-DOF articulated structure, providing ample room for arm movement and enabling complex trajectory motions. Their wrists typically have 2-3 DDOFs, allowing for flexible movement. More advanced painting robots utilize flexible wrists that can bend and rotate in various directions, mimicking the motion of a human wrist. This allows them to easily insert into workpieces through small openings to spray their inner surfaces.
Painting robots are generally hydraulically driven and feature fast operation and good explosion-proof performance. Teaching can be achieved through manual instruction or point-to-point numerical display. Painting robots are widely used in automotive, instrumentation, electrical appliance, and enamelware manufacturing processes.
The main advantages of painting robots:
1. Highly flexible and with a wide range of applications.
2. Improve coating quality and material utilization rate.
3. Easy to operate and maintain, and can be programmed offline, greatly shortening on-site debugging time.
4. High equipment utilization rate; the utilization rate of the spraying robot can reach 90%-95%.
Types and characteristics of painting robots
1. Air-assisted spraying robot
Air spraying robots, also known as low-pressure air spraying, use low-pressure air to atomize paint and apply it to surfaces (walls or wood). Compared to hand brushing, air spraying leaves no brush marks, produces a more uniform surface, and has a shorter working time, effectively shortening the construction period. However, air spraying can cause splattering and paint waste, and extremely fine particles can be seen upon close inspection. Air spraying typically uses air compressors commonly found in the construction industry, offering versatility and lower investment costs. Specialized machines such as suction-type and self-falling air spraying machines are also available on the market.
2. Airless spraying robot
Airless spraying robots can be used for applying high-viscosity paints with sharp edges, and are even suitable for some spraying projects with strict boundary requirements. Depending on the type of machine, they can be divided into pneumatic airless sprayers, electric airless sprayers, internal combustion airless sprayers, and automatic sprayers, among others. It is also important to note that if spraying metal surfaces, it is best to use metallic paint (enamel paint).
