What s going on with car polishing, what s going on with car polishing?

In order to make up for these defects, grinding and polishing are usually carried out after spraying, so as to improve the mirror effect of the paint film and achieve the requirements of brightness, smoothness and showiness. The steps for grinding and polishing are as follows.

1. Clean the whole vehicle. Clean the whole vehicle with a paint cleaner with strong detergency, and when using the cleaning agent, you should avoid new scratches caused by particle dust in the grinding.

2. Water sandpaper grinding. For defects such as coarse grains, fine sandpaper marks, flow marks and other defects on the painted surface, wrap 600 water sandpaper in water in a small rubber liner before polishing, and gently polish it until it is smooth (note that it cannot be worn through the paint layer).

3. Coarse and fine grinding. Use a mechanical grinder (electric or pneumatic) plus coarse abrasive paste to coarsely grind the traces of water sandpaper; Then add abrasive paste to polish and polish fine grinding.

4. Polishing. A mechanical polishing machine is used to remove the spin marks left by the coarse abrasive paste with a mirror treatment agent to achieve the effect of mirror polishing of the paint film.

5. Hand glazing. After grinding and polishing, wipe off the grinding and polishing paste, immediately wipe all the polished parts with cotton yarn dipped in varnish wax, and then wipe off the excess varnish wax with dry cotton yarn to make the paint surface bright and dazzling.

Automobile polishing is the role of the polishing machine driving the high-speed rotation of the polishing disc and the polishing agent to maintain friction with the paint surface to be polished, so as to achieve the effect of removing the oxide layer of the paint surface and repairing scratches. Restore the paint to its original shine.

Car polishing is a kind of polishing the car before the car is waxed or coated, because the vehicle only looks like a sparkling effect after the vehicle is polished, and the effect of the car that has not been polished is generally not long-lasting after waxing. The main working process is to clean the body first, and remove the dust of those particles in the cleaning process to avoid secondary scratches to the vehicle, polish after cleaning, polish after grinding, and wax after polishing to see the car look new, but is it often polished, is it not as long as the car is dirty can be polished.

Remove car surface stains and remove scratches: When there are scratches on your car and you are distressed, or there are some stains that cannot be cleaned, you can choose car polishing, after the car polishing has been reduced by mirror, you can clean the body paint to the previous state, and at the same time, you can also throw away some oxides and corrosives attached to the body such as acid rain and bird droppings, etc., and after polishing, the car paint is also a certain protective effect.

Thin car paint, poor self-maintenance ability: in fact, car polishing is like a person removing the cuticle, once or twice is good, when the number of times, you will find that the ** is getting thinner and thinner, and even can not withstand a little damage, the same is true for car paint, car paint is not regenerated, after layers of throwing, it will only become thinner and thinner, and even lead to the phenomenon of car paint throwing through, and too many times of polishing will also lead to the original self-maintenance ability of the car paint to deteriorate, the hardness will also deteriorate, it can withstand a small pebble, Now it can only withstand a small grain of sand.

Polishing is generally about two months to basically learn, you can even film together to learn, this is a pure technical work, need practice makes perfect, a lot of training, car painting is easy to learn and difficult to refine, easy to get started, but to face a large number of colors to spray for Ao is more difficult, car polishing is a beauty decoration can be, to learn polishing technology must first understand the basic knowledge of beauty, so depending on how much you know about car beauty knowledge, learning polishing technology is completely learned in a short time, But if you need to learn the beauty techniques related to car polishing techniques, you need to practice constantly.

Automobile polishing is to eliminate the oxide layer of the body paint surface and improve the paint defects of the body through the principle of static electricity, friction and polishing.

During the treatment, the speed of the polishing machine is used to rub against the paint surface to generate heat, and the polishing wax is preheated to generate another chemical substance, so that the paint surface becomes soft, and the paint on both sides of the scratch is squeezed into the low recess to make up for the filling scratch.

This method does not hurt the car paint, many people think that it hurts the car paint, that is because the master does not know how to choose polishing wax and polishing sponge balls.

After throwing the light in waxing, it is to put a protective film on the car paint to protect the car paint from external substances.

The biggest difference between an electronically controlled engine and a carburetor engine is the fuel supply system. The fuel supply system of the electronically controlled engine has eliminated the carburetor, but a number of electronic automatic control devices have been added. These include many sensors, actuators, and ECUs.

Electronically controlled engines have to do not only what carburetors do, but also what carburetors can't do. For example, the specific concentration of air-fuel in a combustible mixture can be controlled within the required range. The oil circuit and circuit of the carburetor engine are very clearly divided and do not affect each other much.

The electronically controlled engine fuel supply system increases the electronic control part, which makes the oil circuit and circuit interconnected, which not only affects the work of the engine fuel system, but also affects the normal operation of the engine. Due to the increase in electronic control devices for electronically controlled engines, this makes the entire structure of the engine, including the electronic control system, more complex.

Fast. Navigation.

Structural composition. How it works.

Parameters to be measured. Merit.

Basic idea. In the initial stage, the function of the system is realized by replacing the mechanical control technology with electronic technology, and its function is expanded, so that the performance is greatly improved; After the development to a certain extent, electronic technology can promote the essential change of the system principle, so that the limitations can be broken through, so that the engine performance can be greatly improved.

Electronically controlled engine.

Structural composition. Electronic control unit.

The electronic control unit (ECU) is the heart of the engine's electronic control system. It completes the collection of various parameters of the engine, the control of fuel injection volume and fuel injection timing, and determines the function of the entire electronic control system.

Sensor. Sensors transmit information about engine conditions and environment to the ECU in real time and realistically through various signals.

In other words, what the ECU learns is just an engine made up of many signals. Therefore, the accuracy, reproducibility and immediacy of sensor information directly determine the quality of control.

Actuators. The various control functions to be completed by the electronic control system are realized by various actuators.

In the control process, the actuator converts the control signal from the ECU into a certain mechanical motion or electrical movement, thereby causing the change of engine operating parameters and completing the control function.

How it works. The engine speed and load are used as the basic signals reflecting the actual working conditions of the engine, and the basic fuel injection amount and fuel injection timing are determined with reference to the fuel injection amount and fuel injection timing spectrum corresponding to each working condition of the engine obtained by the test, and then various compensation is made according to various factors (such as water temperature, oil temperature, atmospheric pressure, etc.), so as to obtain the best fuel injection amount and fuel injection timing or ignition timing, and then control the output through the actuator.

Car polishing is the process of car beauty, in the waxing, glazing or coating of the car first to do a polish. Because the glaze coating must be polished first, and it is a finely polished car before it can be made into a mirror. This is the operation that the glaze must go through.

Without polishing, the paint is uneven, and the glaze retention time is very short, and it cannot have the effect of long-term adhesion at all, which is no different from waxing. Of course, according to the situation of the car paint, polishing does not have to be done in all three steps, and new cars often can be restored in one step. However, the car that has done coarse wax must be polished with medium wax, and the car that has done medium wax must be reduced with fine wax.

Car polishing is a car grooming project. After driving the car for a long time, the body will inevitably have various scratches, and the car paint will inevitably appear dull and dull. Car polishing is also something that needs to be done before waxing and glazing, and the body polishing is smooth to ensure the effect of waxing or glazing.

Car polishing is a very common way in daily car repair, of course, everything has two sides, some people think it is good, some people think it is bad, it is controversial, so, is car polishing good? Let's recognize the quality of car polishing and weigh the pros and cons.

The car is well polished

The car paint surface is oxidized, dull and dull, the body has scratches, and the car polishing can be effectively handled, which can make the paint smooth and bright. Car polishing can also clean the car body, effectively remove dirt and corrosion, and achieve the purpose of restoring the cleanliness of the paint surface. Polishing the body before waxing and glazing can make the result better and keep it longer.

The car is polished badly

Because car polishing is the grinding and polishing of the car paint on the surface of the body, the body top paint is thinner, and it cannot withstand many times of grinding, and the polishing will make the car paint thinner and thinner, and if the operation is not done properly, it will hurt the primer, thereby damaging the body. Therefore, it is necessary to pay attention to the frequency of car polishing, not frequent polishing, and the fewer polishing times, the better. If the oxidation is not obvious or the paint surface is ***, in this case, wax and seal the glaze, it is recommended not to polish.