Coating is an important link in the surface manufacturing process of construction machinery products. Anti rust and anti-corrosion coating quality is one of the important aspects of product overall quality. Product appearance quality not only reflects product protection and decoration performance, but also an important factor constituting product value. The coating equipment is an important part of the whole coating process. The main coating equipment is divided into surface pretreatment equipment before coating, painting equipment, drying and curing equipment, automatic conveying equipment, dust-free constant temperature and humidity air supply equipment and other auxiliary equipment.

In order to make the utilization rate of various coating equipment reach a relatively high level, it is necessary to establish a reasonable coating production line: first, determine the production program, complete the process design and scheme planning, and then carry out the design, manufacturing and installation of non-standard equipment. Therefore, process design and scheme planning are the basis for the establishment of production line. Correct and reasonable route will have a decisive impact on production operation and product quality. The content of process design mainly includes: quality requirements of workpiece surface coating, pretreatment method, spraying method, process flow, coating performance, spraying environment, time, etc.