What problems should be paid attention to when automotive sheet metal?

Pay attention to this welding point, and there is also the technique and method of painting, as well as the cleaning strength, we must pay more attention to some details, to achieve the effect of spraying out the surface and being uniform and smooth.

In order to ensure the quality and efficiency of the car body sheet metal repair work, it is necessary to make basic preliminary preparations before the formal repair work. Mainly from the body, damage and process, etc., only these three preparations are organically combined to prepare, so that the subsequent repair work can ensure good quality and efficiency. That is, by analyzing the body of the car and the damage condition, the appropriate repair technology is determined and selected.

Before the restoration can be carried out, a thorough analysis of the car body is carried out. This mainly includes the structural form of the body sheet metal, the composition of the body, the material type of the body, the welding process of the body, etc. Through a comprehensive analysis of the structure, material and welding process of the body, the appropriate sheet metal repair technology is determined to maximize the repair of the body and ensure the manufacturability and quality of the repair.

Before repairing, according to the specific situation of the body damage, determine the damaged area, judge the strength and direction of the collision when damaged, carry out a complete investigation and detection of the place where the body may be damaged, and carry out appropriate repair work according to the standard parameter size of the vehicle after the actual measurement of the body sheet metal, so as to ensure the refinement level of the body sheet metal repair work, so as to improve the quality of maintenance.

Through the various information of the body, the location area of the damaged sheet metal and the specific standard parameter size of the car, etc., a comprehensive synthesis is carried out, so as to select a scientific and reasonable sheet metal repair technology.

After making preparations before repairing, you should also pay attention to the following issues. First, the specific repair technology can be determined through the direct, indirect and inertial effects of the automobile body sheet metal and other parts that cause damage in the face; second, the welding process used can be determined according to the situation of the body material; Thirdly, in the process of correcting and stretching the deformed sheet metal, it is necessary to find the auxiliary support and position it before repairing it to ensure that the deformation of other parts of the body will not be affected; Fourthly, when carrying out welding and replacement parts, it is necessary to accurately locate the parts that need to be replaced, so as to avoid the correction of them again after the welding work is completed, and the overall maintenance efficiency is reduced.

There are two basic principles in the process of carrying out the repair work of car body sheet metal: the principle of economy and the principle of quality. In the process of body sheet metal repair, the first thing to consider is how to improve the economic benefits of repair.

But we can't just focus on economic benefits. Therefore, it is necessary to maximize the economy of the maintenance work under the premise of ensuring quality, taking into account the two principles and taking into account the comprehensive consideration of the restoration work.

For example, when carrying out partial tensile repair work on the right front door frame of the car, how to keep the sheet metal parts near the roof and left rear door frame from being affected, so as to avoid increasing unnecessary maintenance workload. When welding the bottom of the body, the car beam and other positions, how to make the metal internal structure will not develop large changes, to ensure that the thermal stress will not be excessively diffused. In addition, how to effectively solve the problem when maintenance personnel are unable to repair damaged sheet metal due to the space of maintenance equipment or tools.

Precautions and implementation principles are that it is necessary to pay attention to the protection of automobile sheet metal, not to destroy the automobile sheet metal, not to destroy the original paint of the car, to follow the work of automobile maintenance, should be implemented from a relatively small area.

In the process of sheet metal repair, the car should first inquire about the place where the fault occurred, and then carry out targeted repairs. Be sure to pay attention to the sturdiness of the interface.

According to the actual situation, pay attention to the condition of the body, so that you can better judge, better repair, and pay attention to the way of treatment.

Sheet metal is required for car repairs when the vehicle is deformed in a collision and needs to be repaired. The repair of the collision accident vehicle is no longer a simple knocking on the sheet metal of the car, and the quality of the repair cannot be observed by the naked eye alone.

Maintenance personnel should not only understand the technical parameters and dimensions of the body, but also master the characteristics of the body materials, the transmission of the characteristics of the force, the deformation trend and stress point of the body, and the production process of the body, such as the welding process. Many automotive sheet metal parts are welded together by spot welding, oxygen welding, arc welding or gas shielded welding, so sheet metal parts are required to have good welding performance.

When a vehicle is deformed due to a collision, it needs to be repaired with sheet metal. The bump damage caused by the impact should be repaired with sheet metal, and the bump of the sheet metal can be repaired by hammering or jacking up. Warped and skewed metal plates can be repaired using mechanical methods or flame heating percussion methods.

Automobile sheet metal is a technical means of automobile repair, which refers to the repair of the car body after the collision, that is, all other work except for body anti-corrosion and decorative spraying, such as body damage analysis, body measurement, body sheet metal forming, tensile correction, stress relief welding and assembly adjustment of body accessories. Usually if there is too much putty on the surface to be coated, or if the putty is not used properly, the pin ant first needs sheet metal. When the painted part is deformed, sheet metal is also required.

For the repair method of damaged or perforated metal plates, the surface of the perforated metal plate can be repaired by the application method. At present, the main adhesives used are epoxy resin adhesives, phenolic resin adhesives and copper oxide adhesives.

For the study of automobile sheet metal, it is a technical means of automobile repair, which is equal to automobile sheet metal repair, which refers to the repair of the car body after the collision, that is, all the rest of the work except for the anti-corrosion and decorative spraying of the body. Such as the analysis of automobile body damage, the measurement of automobile body, the shaping of automobile body sheet metal, tensile correction, stress relief welding, and the assembly and adjustment of automobile body accessories.

Automobile sheet metal is a processing method for automobile maintenance, also known as cold work, to say that directly, if the appearance of the body is damaged and deformed, the process of sheet metal is needed. Automobile collision repair has developed from the original "smashing, pulling and welding repair" to the secondary manufacturing assembly of the body. The repair of the collision accident vehicle is no longer a simple knocking on the sheet metal of the car, and the quality of the repair cannot be observed by the naked eye alone.

Maintenance personnel should not only understand the technical parameters and dimensions of the body, but also master the characteristics of the body materials, the transmission of the characteristics of the force, the deformation trend and stress points of the body, and the production process of the body, such as welding process. On the basis of mastering these knowledge, maintenance personnel should also use advanced measurement tools to judge the direct and indirect damage and deformation of the body through accurate three-dimensional measurement of the body, as well as the hidden dangers due to the deformation of the body, and formulate a complete body repair plan, and then cooperate with the correct maintenance process and accurate three-dimensional data of each key point of the body, restore the key points of the body to the original position and restore the damaged body to the state when it left the factory.

Sheet metal painting is a car restoration technique. It is to repair the deformed part of the metal shell of the car to restore it to its original shape. Then, by spraying special paint, the surface of the restored metal shell is as bright as the rest of the place.

After the car body is corrected by sheet metal, there are some defects that can not be made up for by sheet metal work, even if it is replaced with new parts, there will be imperfections, in order to achieve more perfect precision, it is necessary to make up for the defects with the process of sculpture, after the car is damaged by deformation and other reasons, its flatness, wheel angle and lines, each part needs to be scraped to fill the grinding out, with this formula: scraping ash = restoring the body skin = mold product = mold processing program, Any body skin of a car is stamped from a mold, and we repair the body skin just like a mold.

Automobile sheet metal paintingWe usually divide into 3 steps:

1 primer.

Fill the sand marks and micropores at the bottom of the workpiece, increase the adhesion of the underlying coating, and also have the effect of defect indication.

2 Primer.

It is very important to prepare a complete and smooth working surface for the topcoat, complete the last process of all primer work, increase the adhesion of the intervening layer and have a certain isolation effect, so as to ensure the quality stability of the topcoat.

3 Topcoats. The topcoat is divided into single-layer paint and multi-layer paint, which is the color determination layer and decorative protective layer, and the single-layer paint is commonly known as plain paint, also known as ordinary paint, which can be completed in one layer.

Sheet metal is a kind of automobile repair technology, the key to repair the deformed part of the metal shell of the car is to dare to think and dare to try. The speed of learning depends on many environmental factors, if you learn in a good auto repair school and learn by hand every day, you will learn quickly.

Sheet metal is basically made of the same thickness, and there are many products made of sheet metal in life. Car Collision Repair Ideas? Automobile collision repair concept In the traditional sense, automobile collision repair is simply to fix the body damaged and deformed in the collision, repair it by heating and mechanical stretching, and then rely on simple tools such as hammers to adjust and repair the gaps and shapes of the body steel plates, doors and columns, etc., and finally restore the original appearance by putty, putty and repair paint.

If the appearance of the body is damaged and deformed, the process of sheet metal is needed to restore the original appearance.

Sheet metal protects the eyes and hands, the main injury comes from the damage to the eyes from sparks, and protective glasses are required to be worn.

1) Before the welding operation, the paint and oil stains on the welding parts of the weldments must be cleaned to ensure that the surface of the working parts conducts well to ensure that the surface of the working parts is conductive.

2) Clamp the ground wire pliers to the workpiece that is polished and cleaned of paint, the closer to the operating surface, the better. (3) Turn on the power switch on the left panel of the machine first, and then select the appropriate gear of the current adjustment switch according to the actual situation.

4) Select automatic or manual welding button, welding time depends on the actual situation of the operator; If you choose automatic welding, you need to adjust the time adjustment knob to the appropriate position.

5) Replace the required welding head for welding, and test it on other workpieces before the formal operation, so as to avoid excessive current or damage to the vehicle for too long time.