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After decades of development, China's automobile industry has become an important industry in the national economy. With the progress of technology and the improvement of various performance indicators of automobiles, governments of various countries have become more and more stringent requirements for energy conservation and environmental protection. Therefore, automobile lightweight has become the main direction of automobile development. Generally, the weight of auto parts can be reduced by 1%, which can save 1% of fuel. For every 1% reduction in the weight of moving parts, fuel can be saved by 20%. Automobile wheels are parts installed on automobiles to support tires, and they are also one of the important moving parts of automobiles. Carbon fiber automobile wheels are manufactured by parting molding or material preforming process, and the thickness of the product after the mold is partially uneven: in order to maintain the integrity of the carbon fiber fiber, the uneven thickness cannot be processed and finished like metal materials. If it is a carbon fiber composite material, the screw holes are installed and worn, causing installation balance problems, affecting driving and safety. In addition, the two-piece carbon fiber hub needs to be locked at the hub lock and spoke screws. If the screws are removed, the carbon fiber screw holes will wear out, which will not meet the locking requirements and affect the driving safety of the car. The thickness of the yarn layer is 0.2-1mm, the carbon fiber spokes are formed by hollow blow molding, the thickness of the spokes is 6mm-20mm, and the filling sealant is glue that is cured at high temperature.

Buying a car is a normal thing for many people.But after buying a car and going home, it will always be dirty as time goes by, and you need to wash the car when it is dirty.Car wash shops are places that car owners visit every month. Of course, some car owners like to wash their cars at home and buy a lot of car wash tools. Many consumers will find that when they wash their cars, there is a place in the car that can't be washed cleanly.This place is the wheel rim of the tire, which is the support accessory of the tire. Because it is relatively close to the ground, it is easier to stick to dust and get dirty. If it is not cleaned for a long time, the wheel rim will get dirtier and dirtier, which is very uncomfortable to look at. To clean up these stains, we need to use a special wheel cleaning agent.We first touch the wheel cleaning agent evenly on the wheel rim, and after waiting for a few minutes, we can easily wipe the stains on the tire with a towel.For the stains deep in the wheel rim, we can use a small toothbrush to clean it slowly.Or if you want to clean up thoroughly, you can also remove the tires. After removing the tires, you can clean the wheels more conveniently and comprehensively.

Many car owners like to drive faster and feel very irritating. Even on uneven roads, they don't speed up. However, this behavior can be very damaging to the wheels of the car.Especially for explosion-proof tires with a low flatness ratio, not only is the tire wall thin, but it is also very hard. When this kind of tire is subjected to a strong impact, the force will be directly transmitted to it, resulting in its loss of roundness, so how to judge its loss of roundness? If it is out of roundness, the driver's more direct feeling is that the car deviates while driving, and the body and steering wheel will shake severely, and even the degree will increase with the increase of the speed.In addition, if it loses its roundness, it will also cause a great impact on the chassis suspension, and in severe cases, it will cause deformation or even fracture of the control arms of the suspension. Since most of the materials used to make it are made of aluminum alloy, it is difficult to repair if there is a loss of roundness. Even if the repair is completed, it will not be able to reach the better state when it left the factory. .Therefore, when this happens, try to do special wheel repair as much as possible, but generally if it is out of roundness, it is recommended to replace it directly, in order to avoid some accidents when the owner is driving.

1.Material selection: The material of the wheel rim will directly affect the strength of the wheel rim.Common materials are aluminum alloy, titanium alloy, carbon fiber, etc. 2.Design structure: The structural design of the rim will affect the strength of the rim, such as the wall thickness and bending radius of the rim. 3.Manufacturing process: Different manufacturing processes will lead to differences in the strength of the wheels. For example, factors such as temperature and pressure need to be considered when casting wheels, while material deformation and holes need to be considered when forging wheels. 4.Use environment: The road conditions and load of the car when driving will affect the wheel rim, which will also affect the strength of the wheel rim. For example, heavy-duty trucks need stronger wheels. 5.External force: When the vehicle is driving, the wheel rim may be affected by external forces such as impact, which will also affect the strength of the wheel rim.

The world's automotive industry is developing in the direction of light weight, high speed, safety, energy saving, comfort and light environmental pollution, and the consumption of automotive aluminum alloy parts is increasing day by day. As one of the important components of the automobile drive system, the wheel is also a kind of component with high safety requirements. It not only carries the weight of the automobile, but also reflects the appearance of the automobile. In the past 10 years, the average annual growth rate of global aluminum alloy wheel production has been 7.6%. With the increasing demand for lightweight automobiles, aluminum alloy wheels are gradually replacing traditional steel wheels and are widely promoted and used in the modern automobile manufacturing industry. It is usually produced by casting or die-casting. Traditional casting methods include differential pressure casting, low pressure casting and gravity casting. Due to the pressure-filled high-speed turbulent movement of the alloy liquid, the gas cannot be discharged in the cavity, resulting in the product blank organization structure is not dense. Compared with the traditional round rod cutting process, the method of upsetting the prefabricated billet can reduce the process of upsetting the round rod and the prefabricated billet in the conventional forging of aluminum alloy wheels, reduce the production process, reduce energy consumption, and improve production efficiency.

A one piece forged wheel rim is a type of wheel that is made from a single piece of forged aluminum or other lightweight metal. The forging process involves heating the metal and shaping it with hydraulic presses or hammers, resulting in a stronger and more durable wheel compared to cast wheels. One piece forged wheels have become popular among car enthusiasts and high-performance vehicles because of their strength, stiffness, and weight savings. They generally offer better handling, braking, and acceleration performance, and are available in a variety of finishes, designs, and sizes. However, one piece forged wheels are typically more expensive than cast wheels, and may require special fitting and maintenance. Additionally, they may not be suitable for heavy-duty or off-road applications, as they may be more susceptible to bending or cracking under extreme stress.

Automobile wheels include hub bolt holders, drainage spiral blades and rims. The structural points of the hub bolt holders and rims are provided with drainage spiral blades to drain air to the outside of the hub, but the drainage spiral blades can drive the air flow when the wheel rotates, and the air flow forms wind, but the guide spiral blades guide the air flow from the inside of the car to the outside of the car. The inclined wind guide surface will produce a certain concentration of air during the rotation of the wheel, and will converge with the inclined direction of the inclined wind guide surface. Since the inclined wind guide surface is curved, the support ribs are closer to the fixed seat, and the inclined the wind guide surface. The greater the inclination angle. The support ribs gradually increase the concentration of flowing air from the outside of the rim to the inside, thereby introducing air into the vent, because the vent penetrates the rim, the air can be directly directed to the brake and bearing assembly, effectively improving the heat dissipation effect. The air outlet is located on the side of the inclined wind guide surface close to the center of the rim. The number of support ribs is even. The two support ribs form a triangular structure with the rim. The triangular stable structure is adopted to make the support ribs support the rim more stable, thereby ensuring the safety of the hub.

1. In order to maximize safety and reliability, it is recommended that you always check the hub bearings no matter how old the car is-pay attention to whether the bearings have early warning signs of wear: including any friction noise during rotation or abnormal deceleration of the suspension combination wheel when turning.For rear-wheel drive vehicles, it is recommended that the front wheel hub bearings should be lubricated when the vehicle travels to 38,000 kilometers.When replacing the brake system, check the bearing and replace the oil seal. 2. If you hear the noise from the bearing part of the hub, first of all, it is important to find the location where the noise occurs.There are many moving parts that may produce noise, and it may also be that some rotating parts have come into contact with non-rotating parts.If it is confirmed that it is noise in the bearing, the bearing may be damaged and needs to be replaced. 3. Because the working conditions for the failure of the bearings on both sides of the front wheel hub are similar, even if only one bearing is broken, it is recommended to replace it in pairs. 4. Hub bearings are more sensitive, and the correct methods and suitable tools need to be used in any case.During the storage, transportation and installation process, the bearing parts cannot be damaged.Some bearings require greater pressure to be pressed in, so special tools are required, and you must refer to the automobile manufacturing manual. 5. When installing the bearing, it should be in a clean and tidy environment. The entry of fine particles into the bearing will also shorten the service life of the bearing.It is very important to maintain a clean environment when replacing bearings.It is not allowed to strike the bearing with a hammer, and be careful that the bearing does not fall to the ground (or similar improper handling).The condition of the shaft and bearing seat should also be checked before installation. Even minor wear and tear can lead to poor fit, which can cause early bearing failure. 6. For the hub bearing unit, do not attempt to disassemble the hub bearing or adjust the sealing ring of the hub unit, otherwise the sealing ring will be damaged and water or dust will enter.Even the raceway of the sealing ring and the inner ring are damaged, causing permanent bearing failure. 7. There is a magnetic thrust ring in the sealing ring equipped with the bearing of the ABS device. This thrust ring cannot be subject to collision, impact or collision with other magnetic fields.Remove from the packaging box before installation and keep them away from magnetic fields, such as electric motors or power tools used.When installing these bearings, the operation of the bearings is changed by observing the ABS alarm needle on the instrument panel through the road test. 8. Hub bearings equipped with ABS magnetic thrust rings. In order to determine which side of the thrust ring is installed, you can use a light thing close to the edge of the bearing, and the magnetic force generated by the bearing will attract it.When installing, point one side of the magnetic thrust ring inside, facing the sensitive components of the ABS.Note: Incorrect installation may cause the function of the brake system to fail. 9. Many bearings are sealed, and such bearings do not need to be greased during their entire life.Other unsealed bearings, such as double-row tapered roller bearings, must be greased and lubricated during installation.Due to the different sizes of the inner cavities of the bearings, it is difficult to determine how much grease is added. The most important thing is to ensure that there is grease in the bearing. If there is too much grease, when the bearing rotates, the excess grease will ooze out.General experience: During installation, the total amount of grease should account for 50% of the bearing clearance. 10. When installing lock nuts, the torque varies greatly due to the different bearing types and bearing housings. Note to refer to the relevant instructions.

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.