In the process of sheet metal processing, the welding and spraying design of sheet metal processing need to pay great attention to, we are in the processing of relatively narrow internal space for the workpiece if the inside welding, should consider how to insert the welding gun.


What problems should be paid attention to in sheet metal processing, welding and spraying design

When the plate thickness is ≤1mm, it is easy to produce shrinkage cavity or burn through after welding, and the deformation generated by welding is large. And spray mainly divided into the following three:

Flat: can be subdivided into matte, flat, highlight, coating thickness of about 60-90 m, about 90-120 m after the back spray.

Sand grain: it can be subdivided into fine sand grain and coarse sand grain. The thickness of spraying layer is about 50-80 m, and it is about 80-110 m after backspraying.

Orange grain: it can be subdivided into small orange grain and large orange grain. The thickness of spraying layer is about 90-120 × m, and it is about 120-150 × m after backspraying

The thickness of coating layer will exceed the above thickness.

1, flat: advantages: better appearance, screen printing effect; Disadvantages: high spraying cost, high rework rate, easy to scratch, and the external surface scratch can not be repaired, and the most difficult to highlight the spraying. When possible, avoid using flat light, especially for large cases, which are easy to bump during handling.

2, sand: advantages: not easy to scratch, spraying cost in the three lowest; Disadvantages: surface oil is not easy to clean, screen printing effect is not as smooth, orange grain.

3, orange grain: advantages: not easy to scratch, screen printing effect is good, the surface oil is easy to remove, spraying cost is slightly higher than sand grain, but far lower than flat. Faults: slightly less beautiful than flat.

4. Paint the color as uniform as possible, use the color of the company's mainstream products to facilitate suppliers to order powder.

5. Try to use only one spraying color for one product to reduce the spraying cost (the processing time greatly increases when spraying multiple colors) and reduce the probability of spraying errors of suppliers.

6. Avoid using silver powder. Silver powder containing silver compounds, powder price is twice the ordinary powder, spraying difficulty is also large, easy to produce defective products.