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In fact, whether it is a family car or an operating vehicle, how often a car tire needs to be filled is not judged based on time, but based on the tire pressure value of the car tire to determine whether the tire needs to be inflated.It is not that the tire must be inflated once a month or two. What the owner needs to do is to check the air pressure value of the tire within a certain period of time to determine whether it needs to be inflated and pressurized. Moreover, most family cars now have tire pressure alarm systems. If the tire pressure is normal and the alarm system is not on, then basically the tires are not out of air and there is no need to inflate.However, if the tire pressure warning sounds, the owner needs to check whether the tire pressure is too high or the tire pressure is too low. At this time, you can view the accurate tire pressure value from the car's central control screen. If the tire pressure value is shown to be too low, the owner needs to inflate and replenish the pressure in time. Although car owners know that car tires need to be filled in time, they don't know how much tire inflation is appropriate.Under normal circumstances, the tire pressure of automobile tires is generally controlled in the range of 230 kPa to 250 kPa, but due to different models, the corresponding standard tire pressure values will be different. Therefore, the owner can refer to the tire pressure values on the B-pillar and C-pillar of the car door, so that the car tires can be more accurately pressurized. After all, the tire pressure values of the four wheels of most cars are slightly different.If the car owner does not find the tire pressure value as mentioned above when he is pumping, he can also directly observe the value on the tire pressure device and control it within the range of 230 to 250 kPa.

Three-piece aluminum alloy wheels are tightened by a central member and two outer rings and screws. In order to reduce quality, many three-piece aluminum wheels use forgings. Three-piece aluminum wheels use forgings. The three-piece structure provides manufacturers with greater flexibility for small batch manufacturing. For high-speed vehicles, high-temperature tire bursting and reduced braking efficiency caused by wheels deformation and braking are common phenomena. The thermal conductivity of aluminum alloy is 3 times higher than that of steel and iron, and the heat dissipation effect is much better. It improves braking efficiency, improves the service life of tires and brake discs, and effectively ensures the safety of automobiles. Aluminum alloy wheels usually use radial tires. The cushioning and shock absorption performance of radial tires is better than that of ordinary tires. When the car is driving on uneven roads or at high speeds, the comfort will be greatly improved and the stability will be higher. Due to the light weight of aluminum alloy wheels (aluminum or steel wheels have the same specifications, the difference is about 2kg) and the high manufacturing accuracy, the deformation at high speed rotation is small and the inertial resistance is small, which is conducive to improving the linear driving performance of the car, reducing the rolling resistance of the tires, thereby reducing fuel consumption.

When driving in normal times, you may encounter fever in the wheels of the car. Many people may think that the car is damaged or caused by some other reason.This is a very simple question, so don't worry too much. The reason for its heat may be that the tire rubs against the ground for a long time and then generates heat that will be transmitted to it, and then it will cause its temperature to rise. Another reason is that because of long-term braking, the friction of the brake pads will also produce high temperature conduction to it, causing the temperature to rise. In fact, this situation occurs because of the heating of the wheel hub. This is a very common and normal phenomenon. You only need to pay a little attention to it. You don't need to enter the repair shop. If the owner is really worried, you can also go to the repair shop to take a look. It should be noted that in normal times, we must pay attention to its maintenance and repair. If it has some faults but is not found, this is a very dangerous thing. After all, it is used by someone on the car.

Aluminum alloy wheels have the advantages of fuel saving, good heat dissipation, extended engine life, good roundness, and durability. They have been widely used in the automotive industry. Aluminum alloy wheels have a beautiful appearance and have become a fashion in many countries and regions. The surface coating process of aluminum alloy wheel hub includes: first pretreatment of the wheel hub, then spraying epoxy resin on the wheel hub by electrostatic spraying method, then grinding and cleaning the powder, and coating the wheel hub by vacuum coating method. The coating material is aluminum, iron, nickel and other alloy coating materials. The coating adopts four processes: pretreatment, electrostatic spraying, vacuum coating, and varnish to improve the binding strength of aluminum alloy wheels and coatings and improve the corrosion resistance of aluminum alloy wheels. The method includes pretreatment of the surface of aluminum alloy wheels, spraying pre-coating, spraying cr3c2 layer and post-treatment steps. The step of spraying cr3c2 layer is to use high-speed flame spraying method to form a cr3c2 layer with a thickness ≥0.15mm on the surface of the wheel and trim it to a predetermined thickness. High-speed flame spraying method is used to form 0 on the surface of aluminum alloy wheels.Lost 12 to 0.13mm pre-coating, and rotate it to a roughness of 0.05-0.08mm, the pre-coating is composed of nickel-plated aluminum or aluminized nickel powder.

The selection of wheels, how to choose the best one?Many people will transform the car at will in order to change the performance of the car. The transformation of the car requires professional knowledge. For the wheel rim, we cannot arbitrarily increase its diameter. 1. Don't blindly increase the wheels.Some people increase the wheels to improve the performance of the car. When the outer diameter of the tires remains the same, the large wheels are bound to match the wide and flat tires. The lateral swing of the car is reduced, and the stability is improved. When cornering, it is like a dragonfly, passing lightly.However, the flatter the tire, the thinner its thickness, the worse the shock absorption performance, and greater sacrifices must be made in terms of comfort.In addition, if there are a few roadblocks such as stones, the tires can easily be damaged.Therefore, the cost of blindly increasing the wheel rim cannot be ignored.Generally speaking, it is most appropriate to increase one or two sizes according to the size of the original wheel rim . 2. This means that when choosing, you can't choose your favorite shape as you want, and you have to follow the advice of professionals to consider whether the three distances are appropriate. 3. The wheels with complex structure and dense density are indeed beautiful and appear to be of high grade, but it is easy to be refused to wash or overcharged when washing the car because it is too troublesome to wash.The simple wheels are full of movement and clean.Nowadays, the aluminum alloy wheels that are deeply popular with the people, compared with the iron-cast wheels in the past, the degree of deformation resistance has been greatly improved, the weight has been greatly reduced, the power loss of the car is small, it runs fast, saves fuel and has good heat dissipation. It is loved by the majority of car owners.Here is a reminder that in order to cater to the tastes of car owners, many car dealers replace iron wheels with aluminum alloy wheels before selling cars, but they add a lot to the price.So from the perspective of affordability, don't pay too much attention to the material of the wheels when buying a car. Anyway, you can change it according to your own style, and you can save a fortune in the price. Why not?

The closed forging process of the outer ring of automobile wheel rim includes cutting: the blank is made by sawing process, heating: the blank is heated to 1100~1400℃, upsetting: the blank is upsetting on the upsetting equipment to obtain a drum-shaped blank, pre-forging: The drum-shaped blank is made of pre-forged parts through the pre-forged die, precision forging: The pre-forged parts are made of forgings through precision forging dies and hot forging machines. The sawing process can better control the accuracy of the blank blank, reduce the burrs of the forgings, make the quality difference between the blank and the final forging smaller, and reduce the loss of raw materials. The forging process adopts a 2500-ton hot die forging press, which is formed by a cavity forging process. The weight difference between the blank and the forging is controlled within 0.3% during the blanking period, which controls the cutting accuracy, reduces the generation of burrs in the forging, and reduces the waste of raw materials. When designing the forging die, the upper die is designed as a punch, and the lower die extends to the periphery of the cavity, and the guide hole is designed.

The aluminum alloy wheels forged in our country use 6061 grade aluminum alloy (LD30). Compared with traditional steel wheels, they have the advantages of light weight, beautiful appearance, and good heat dissipation performance. However, due to the limitations of 6061 material, under the existing commonly used forging methods, its good mechanical properties can only reach tensile strength of 350Mpa, yield strength of 320MPa, elongation of about 12%, a piece of 6061 aluminum alloy truck wheel finished product is about 25kg, so its tensile strength, yield strength, elongation and weight can no longer meet the requirements of existing trucks for wheels. Forging: The front surface of the cast rod is pre-forged with a pressure forging machine, forged into a bowl shape, and then the back of the cast rod is forged once with a pressure forging machine, forged into a cylindrical shape, and the cast rod is rolled into a forged billet with a spinning machine. The forged billet is in the shape of the edge of the rim. Heat treatment: solid solution treatment of forged billet, solution temperature 465-475℃, solution time 2-3 hours, quenching within 15 seconds after solution treatment, quenching temperature 40-60°C, time 85-95 seconds, aging treatment after quenching, aging temperature 115-125°C, aging time 22-24 hours.

The et value of the wheel rim is also called the et offset value, and the et value is the offset value, which is the offset.In fact, it refers to the degree of deviation between the rim installation interface and the centerline of the rim. If the et value is greater and becomes a negative value, then it proves that the rim installed on the body will deviate from the outside. So in other words, different et values will affect the wheel track, and the wheel track will affect the maneuverability of the car. And under normal circumstances, the smaller the value of et, the more the rim will protrude outside the wheel arch.And there are only three degrees of deviation between the interface of the rim installation and the centerline of the rim, one is positive, one is 0, and the other is negative.Among them, the direction to the outside is positive, but the direction to the inside of the rim is negative.And changing the rims will change the wheel track of the car, and the wheel track will affect the distance of the centerline. So in short, the et value is positive and negative. In most cases, the et value of a car is usually positive. Only a few vehicle models or four-wheel drive vehicles will use negative values. Only off-road vehicles will be installed in the process of use. Copied other vehicles usually install upright wheels.For example, the offset of most vehicles should be et40. If the value is replaced with et45 or et50, then in terms of visual effects, the rim will be easier to enter the wheel arch than the original rim. Therefore, if you replace it with a rim that is less than the et40 offset value, the visual effect will look more outward than the original rim. This is because the et value is negative, so it can be seen from the visual effect that the rim looks like it is mounted outside the body.

The rim is the support inside the tire.The tire itself is very soft.The internal contour of the tire supports the barrel shape of the tire.The parts mounted on the shaft are called rims. ”Multi-layer environmental protection ion technology" electroplating wheels use powder spraying technology and magnetic control vacuum coating technology.Production technology has replaced the traditional high-pollution, high-cost, zero-pollution, and efficient production model, creating high value-added, advanced product technology, beautiful and luxurious, green and environmentally friendly, and superior performance. It has been widely recognized by the domestic and foreign markets. Once the electroplated wheel rim is scratched, the cost of replacing the entire wheel rim is relatively high and cannot be repaired and refurbished. Generally, some of the original wheels have a painted surface, some have a brushed surface, some have a polished surface, some are imitated electroplating, and some are electroplated wheels. Then, whether it is painting, drawing, polishing, imitation electroplating, wheel maintenance and electroplating maintenance, experts can change to electroplating wheels.If the surface is electroplated wheels, it can be electroplated for a long time. If our wheel rim itself has corrosion, clearance, deformation, etc., can we still perform electroplating? It's completely possible. The electroplating of the wheel rim is to repair the wheel rim and then perform electroplating to ensure the quality and effect of the wheel rim electroplating.

Some people increase the wheel rim in order to improve the performance of the car. In the case of the same tire diameter, the large wheel rim should be matched with the wide tire. The lateral swing of the car is small and the stability is improved, but the flatter the tire, the thinner its thickness, the worse the shock absorption performance, and the greater the sacrifice of comfort. The complex structure and dense wheels are really beautiful and look very high-grade, but it is easy to refuse to wash or overcharge when washing the car, because it is too troublesome to wash the car, and the simple wheels are dynamic, clean and tidy. Compared with the previous cast iron wheels, the popular aluminum alloy wheels have greatly improved deformation resistance, greatly reduced weight, small power loss in the car, fast running speed, and good fuel-saving and heat dissipation. They are loved by the majority of car owners. As a reminder, many car dealers choose to use aluminum alloy wheels to cater to the tastes of car owners. They can be changed according to their own style, and the styling styles of the wheels are also diverse for consumers to choose from.

Because aluminum alloy wheels have the following four characteristics, many cars currently use aluminum alloy wheels： 1.Driving comfort has been improved. Because aluminum alloy wheels have the metal characteristics of absorbing vibration and rebound, they have high dimensional accuracy after being processed by CNC machine tools.It's really round.Partial swing and small beating.The balance is very good, which can make the car very smooth and comfortable. 2.Fuel-saving and normal driving. Due to the light weight of the aluminum wheels, the rotational inertia of the four wheels is reduced after replacement, the acceleration of the car is increased, the braking energy demand is reduced, and the fuel consumption is reduced. 3. Improve driving safety. The heat dissipation coefficient of aluminum alloy wheels is three times that of ordinary steel wheels.At the same time, combined with the structural characteristics of aluminum alloy wheels, when driving for a long time, the heat generated by the tires and braking system is discharged into the air to maintain the appropriate temperature. 4.The beauty of the whole vehicle is improved. The exterior design of the aluminum wheels is very exquisite.The shapes are diverse, and the integration of the wheels can also be realized to show its beauty and enhance the beauty of the vehicle.

As the heavyweight component of a car, the wheel rim of a car is also very important for maintenance. If there is no proper maintenance, the car will have certain safety risks. If it is slightly smaller, it may cause the car to stop on the road and fail to start. If it is serious, it may also be dangerous.Therefore, maintenance is a very important thing. The maintenance method is mainly based on the following points, and the following points can be done to eliminate at least 95% of the hazards of the wheels. 1.The repaired wheels are comparable in quality and appearance to the new wheels.In order to maintain the wheels, wheel repair experts said that vehicles should try to travel on flat roads, such as expressways or flat urban roads.Try not to drive in places with bad road conditions, such as rocky country roads, rugged mountain roads, etc.If the road conditions are not good, you must slow down.These roads with bad road conditions are common situations where wheels are severely damaged. 2. Gently scrub.When washing the car, scrub as gently as possible.Do not touch the surface of the wheel rim with hard objects to avoid scratching the surface of the wheel rim.If it is a painted wheel rim, once the cleaning tool is good, it may leave small traces on the surface, so try to scrub with a soft cleaning tool.