How long does it take to touch up the paint in automotive sheet metal?

Many friends have a superficial understanding of sheet metal and painting, and think that it is only necessary to restore the shape of the collision car by mechanical means and paint it. I think the operation of sheet metal and painting is very complicated in the process of repairing the collision car. Here's a brief introduction to friends about how long it will take to touch up the paint in automotive sheet metal.

Sheet metal processing (local depression)

(1) Disassembly of sheet metal parts. Remove the sheet metal parts of the damaged part of the collision vehicle from the original body by cutting.

(2) Damage confirmation. After cleaning the damaged area, confirm the damage degree, and then formulate the repair method.

(3) Remove the old paint film. Grind the original paint on the damaged area until the iron plate layer is exposed.

(4) Flatten the sheet metal parts. According to the damage degree of sheet metal parts, use the corresponding sheet metal tools to level the concave position. After leveling, the surface of sheet metal parts needs to be fine-tuned by flatness.

(5) fire treatment. Through fire sealing treatment, the tensile stress and compressive stress generated in the process of restoring the original shape and thickness of metal can be eliminated, and the rigidity and strength of metal plate can be maintained.

(6) Polishing the edges of feathers. Grind a buffer slope at the position where the damaged area is connected with the surrounding paint film, so that the newly sprayed car paint can be better connected with the original car paint.

(7) Apply epoxy primer. After the second grinding, the damaged surface is cleaned and degreased, coated with epoxy primer and dried, and the rust prevention work is done well.

The above sheet metal operation process meets the objective requirements of small damage to sheet metal parts. If the car body collides seriously and damages the frame, it will be more difficult to rectify the whole frame on the frame straightening machine.

Painting process flow

1. Diluent should not be put too much, only less. 1:08~ 1。

2. When spraying a layer of paint, measure the amount. It is not enough to use black paint or white paint mixed with original paint as primer.

When it is cold, you need to wait for the paint to dry before applying the second coat of paint. If the brightness is too bright, the second paint must pay attention to the distance and speed of the gun.

4. The paint thickness difference is too big, is it necessary to dilute too much or the gun pressing distance is unstable?

5. Paint from inside to outside, from back to front, from high to low, and pay attention to details and dead ends.

6. 1k paint should not be sprayed too brightly. If it is too bright, the original painting will be displayed. If displayed, it will be washed with tinea water and then repainted.

7. It is best to cover it with red paint on a white background, and the sprayed color is brighter.

8. When drawing, the air pressure should not be too big or too small, but just right. Too big paint will look rough, and too small paint will not loosen.

9.2k black paint can be covered with 1k after it is completely dried.

10. When painting, the passed paint must cover 3/2 of the previous paint and varnish.

1 1. The ratio of varnish to curing agent and diluent is 2: 1:0.8. Diluent can be put less, but curing agent must not be less. When the varnish concentration is not enough, there is no need to add thinner.

12. Don't peel off when spraying edge light, otherwise it will all fall off.

13. When reworking, the oil stain must be dry and firm before reworking and polishing. If the wood has dry paint to be reworked, spray it slowly, one by one.

14. If the oil flows smoothly, it should be thickened and let it flow away while watching.

15. matte paint. The ratio of varnish to matte agent is 1: 1 semi-matte and 1:2 full matte.

16. Clean the spray gun when spraying the double-coat paint. Pay attention to spraying.

17. White pearls should be sprayed with 1k white background first, then coated with pearls, and finally coated with varnish.

18. The gun distance needs to be directly proportional to the gun speed (the gun speed is slower when the gun distance is far, but the opposite is true when the gun distance is close). )

19. Standard varnish should be full of brightness.

20. When painting, if the paint is not completely dry, spray it lightly, otherwise the paint will be washed off.

2 1. The personal optimum air pressure is one and a half laps, and so is the sector.

22. Can light oil prevent large areas of orange peel in winter? The dilution dose of 10/ 1 gun distance can be increased, and the air pressure is one circle. The effect is very good.

Inspection of painting quality of body panels

1. Look at the paint.

First, the smoothness of the paint surface. Paint has dents, bubbles, impurities and&; Paint and coating. These problems are basically possible. It is said that car paint is dust-free operation, but in 4S shops or repair shops, there will inevitably be some impurities and floating dust in the air, which will stick to the car paint if it is not handled well.

2. Look at the color difference

It is absolutely impossible to say that it is exactly the same as the original car paint after painting. Offline painting is basically manual operation and can be recognized by the naked eye. Because of the weather and light, it is bound to be different. Consumers can check whether there is color difference by comparing it with the original car paint, but remember to expose it to the sun. If the color difference is serious, it is absolutely necessary to ask for repainting.

3. Brightness of varnish

Varnish refers to the transparent paint on the car paint. The key of this transparent paint is to brighten and protect the car paint, so it is necessary to detect the brightness of the varnish, which will also affect the visual effect. This also needs to be seen in the sun.

Well, today's brief introduction of automotive sheet metal painting time by friends of Bian Xiao Auto is over. I wonder if friends have a better understanding of the repainting time in automotive sheet metal after listening to the introduction of Bian Xiao Auto? I hope the profile of Bianxiao Automobile can help my friend. If you want to know more, pay attention to this website. Bian Xiao's car is waiting for you here!

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