To ensure the quality and process of chassis parts of New Car, it is necessary to strictly monitor and manage from the following aspects: 1. Design stage First, ensure that the design of chassis parts meets relevant standards and requirements, including structural design, material selection, process flow, etc. Designers should have professional knowledge and experience, and be able to design a reasonable and reliable chassis part structure according to the use environment and working conditions of Fuel Car, and take into account possible problems in the manufacturing process. 2. Material selection The quality and process of chassis parts are closely related to the selected materials. High-quality materials such as high-strength steel, alloy materials, etc. should be selected, and the chassis parts have sufficient strength and rigidity to meet the load-bearing and vibration resistance requirements of Fuel Car during operation. At the same time, it is necessary to ensure that the supplier of materials has a good quality system and can provide stable and reliable raw materials. 3. Manufacturing process The manufacturing process is an important factor affecting the quality of chassis parts. Strict process flows and standard operating procedures should be established to ensure that every manufacturing link meets the requirements. Use advanced manufacturing equipment and technology to ensure the processing accuracy and surface quality of chassis parts. At the same time, it is necessary to strengthen the training and management of employees to ensure that they have good operating skills and quality awareness. 4. Inspection and testing

In the process of New Car stamping parts forming, in order to ensure its processing accuracy, it is necessary to fix the materials, molds, etc., so the positioning device is indispensable. Considering its importance to Fuel Car stamping parts, the design of the positioning device must be cautious so as not to affect the stamping effect. When the punching die is placing the strip material or workpiece, it is required to maintain a certain relative position with the cavity to ensure the correct overlap or the accurate position of the punching and trimming. Therefore, Fuel Car sheet metal parts should have corresponding positioning devices for the mold, including positioning pins, positioning blocks, positioning plates, etc. However, the premise is to fully consider the reliability of the positioning device, the accuracy of positioning, the conformity with the actual conditions, etc., among which the pin-type positioning device is more commonly used. This kind of positioning device can also be subdivided into many types, such as fixed stop pins, elastic stop pins, hook stop pins, etc. Each product has its own characteristics, so the applicable occasions are also different, and the choice should be cautious.

New Car stamping parts must be familiar to everyone, and in our impression, the price of New Car stamping parts products is relatively high, mainly because of the high cost. So what good methods can we use to reduce the cost of Fuel Car stamping parts? In the production process of New Car stamping parts, if you want to reduce costs, you still have to start from the process, especially in some fixed costs, but you must ensure that the quality of Fuel Car stamping parts products is not affected. There is another aspect, that is, the mold of New Car stamping parts. In the entire production cost of Fuel Car stamping parts, the proportion of molds is quite large, so reducing mold costs is an effective way to reduce costs. Especially in the case of automated production, although its mold depreciation will increase, the cost of processing will be reduced. Through the above two aspects, the cost of New Car stamping parts is bound to be reduced, and you can try it.

The press first drives the motor to work through the transmission mechanism. The transmission mechanism is composed of belts and gears to decelerate and increase force. The structure of the transmission mechanism generally includes a screw mechanism, a crank-connecting rod mechanism and a hydraulic cylinder. Therefore, the press is also divided into these three categories. The most common one is the crank press, also called a mechanical press, which is a common type of press. The mechanical presses generally used on the New Car stamping line are large and have a large load. The weight of the mold to be replaced is also several tons. The force loaded on the body of the New Car parts is often thousands of times the weight of the New Car. The press body must not be deformed. The difficulty can be imagined. Moreover, a large press costs millions to cast a single body. In order to enhance the transmission capacity, most are equipped with herringbone gears. The lathe used to process a gear is tens of meters long, and the gear shaping process may take several months. Whether the parts of Fuel Car are extremely large or extremely small, they will have higher requirements for the precision of the machine. The press is a typical large part with complex manufacturing process, high stability and precision requirements, and long manufacturing cycle. It is not easy for Chinese press manufacturers to win the market.

Low-pressure casting of New Car aluminum alloy is a common metal processing method. By injecting liquid New Car aluminum alloy into the mold, after a series of process steps, the desired casting is finally obtained. This process has the advantages of high efficiency, precision and low cost, so it is widely used in many industries. 1. Mold preparation: Selecting a suitable mold is the main task of low-pressure casting of New Car aluminum alloy. The mold should have good heat resistance and corrosion resistance to ensure the quality of the casting. In the mold preparation process, it is necessary to design and make the mold according to the product requirements, including the shape, internal structure and cooling system of the mold. 2. Melting of New Car aluminum alloy: During the low-pressure casting process, the New Car aluminum alloy needs to be heated to a liquid state to facilitate injection into the mold. The melting process needs to control parameters such as furnace temperature, New Car aluminum alloy composition and melting time to ensure the quality and stability of New Car aluminum alloy. 3. Mold spraying: Before the New Car aluminum alloy is injected into the mold, a special coating needs to be sprayed on the mold surface to prevent the New Car aluminum alloy from directly contacting the mold and reduce friction and wear. The sprayed material is usually a high temperature and corrosion resistant ceramic material that provides good lubricity and thermal insulation. 4. Injection casting: When the mold is ready and sprayed, you can start injecting Fuel Car aluminum alloy. In the low-pressure casting process, liquid New Car aluminum alloy needs to be injected

At present, there are counterfeit and inferior products in the accessories used in almost all types of Fuel Car. Among them, nearly 1/3 of the accessories have no origin, no model, and the source is unknown. There are also many accessories that are the reincarnation of scrapped car materials. Therefore, it is very necessary to master some knowledge of identifying counterfeit and inferior New Car exterior trims. When purchasing New Car exterior trims, it is often easy to find flaws from the packaging, and they should be carefully identified. The packaging of original parts is generally more standardized, with unified standard specifications and clear and formal printing. When you open the packaging box, there are also product certificates, manufacturer production licenses and inspector numbers. Some important parts such as generators, distributors, fuel injection pumps, etc. are also equipped with instruction manuals to guide users to use and maintain them correctly. The packaging and printing of counterfeit products are relatively crude, often without three certificates or incomplete. Brand-name products often use good paper, plastic paper bags in the paper box, and transparent tape or a few drops of glue at the opening of the paper box. Poor quality of paper boxes, glue and pattern wiping process may be counterfeit products. Therefore, it is necessary to check whether the trademark, factory address, grade and anti-counterfeiting mark on the packaging are authentic.

In fact, it is to eliminate the residual stress caused by work hardening and production, so that it can restore its original plasticity, so we need to soften it. Generally speaking, according to the softening requirements, we can divide it into isothermal annealing, complete annealing, stress annealing, recrystallization annealing, etc. 1. The unfolding method of Fuel Car sheet metal parts should be suitable, and it should be convenient to save materials and processability. 2. New Car sheet metal parts should reasonably choose the gap and hemming method. The gap below T=2.0 is 0.2, and the gap between T=2-3 is 0.5. The hemming method uses the long side to wrap the short side (door panel type). 3. New Car sheet metal parts should reasonably consider the tolerance of the outer dimensions: negative difference goes to the bottom, positive difference goes half; hole size: positive difference goes to the bottom, negative difference goes half. 4. Burr direction. 5. Check the material, plate thickness, and plate thickness tolerance. 6. Draw the cross-sectional view for the position direction of tooth extraction, riveting, tearing, punching convex points (package), etc. 7. Places prone to error (similar asymmetry) should be highlighted. 8. For special angles, the inner radius of the bending angle (generally R=0.5) should be tried and unfolded. 9. Enlarged images should be added for places with more dimensions. 10. Places that need spray protection must be indicated.

Exterior trim parts of New Car are the parts systems that use the most plastic materials among New Car parts, mainly including bumpers, reversing mirrors, lights, door handles, front fascias, panoramic sunroofs, etc. Exterior trim parts for Fuel Car are generally formed by injection molding, and then sprayed or textured. As spray parts, in order to ensure consistency with the color of the car body and the quality of the paint, the spray paint system must be taken into consideration when selecting materials. For example, in North America, high-temperature baking systems are often used for car body paint. This must be considered when selecting materials for exterior parts. To choose materials that can withstand heat baking; as leather parts, when selecting materials, you need to pay special attention to whether the color and aging resistance of the materials meet design requirements. Common interior materials at this stage include PP (polypropylene), ABS (acrylonitrile-butadiene-butadiene plastic), ASA (butadiene, acrylonitrile and acrylic vulcanized rubber mixture), POM (polyester chips) , PA (polyester, acrylic resin), PC (polycarbonate), PE (high-pressure polyethylene), etc., but the actual raw materials used in each part are very different. The following is a detailed introduction to the raw materials used in the actual parts system. Selection and use conditions.

In layman's terms, interior modification is not only for New Car exterior accessories manufacturers. According to investigations and studies, car owners in some eras pay special attention to interior space. In view of various reasons (economy, policy guidance, and applicability and ease of use, etc.), they prefer to buy models that are small on the outside and large on the inside. In some eras, the importance of the interior space of small Fuel Car has increased very quickly. In 2004, only 4% of car owners put the interior space of the car as an important reason for buying Fuel Car. In 2008, this percentage increased to 9%. One of the reasons why Chinese consumers pay more attention to external perception is related to the development characteristics of the Chinese market. Most Chinese consumers are buying Fuel Car for the first time and have little experience in using cars. They care about the benchmarks of price, appearance, modified interior space, feel and visual harmony. For a series of parameters, power performance and other aspects, it cannot be said that they do not pay attention, but they do not know much and lack the ability to judge. For a long time, for manufacturers who spend a lot of energy designing the appearance of Fuel Car, the interior of the car is just a follow-up problem that lacks attention. Since the rapid growth of the private car market, people have gradually begun to pay attention to car interiors, and modified interior design has also slowly begun to develop. However, there is still a big gap between the domestic and international advanced levels.

The interior operating system of New Car is an important part of small Fuel Car. Sometimes the design difficulty of the interior operating system is about 60% of the difficulty of the car styling, which is much higher than the appearance of small Fuel Car. It is one of the most important parts of the car. Each OEM generally has a huge interior team to complete a large number of project tasks related to interior modification.   Dimensional engineering is divided into two parts: styling and engineering design. In the process of engineering design, the design difficulty of the white body is the first, and then the design of the interior operating system is modified. The design of the car's exterior parts is ranked last. This may be something that ordinary people or non-industry experts cannot imagine. The vehicle interior mainly includes the following management subsystems: instrument panel operating system, auxiliary instrument panel operating system, door wall panel operating system, ceiling operating system, seat operating system, square column wall panel operating system, remaining cab interior parts operating system, cab indoor air circulation, luggage bag interior parts operating system, power generator console parts operating system, carpet, safety buckle, New Car airbag, brake pedal, as well as the interior lighting of the car, the interior sound-absorbing material operating system and so on.

Its main function is to block ultraviolet rays, block some heat, prevent injuries caused by glass splashing, prevent glare, etc. At the same time, according to the one-way perspective performance of the solar film, it can protect personal privacy. In addition, it can also reduce the damage caused by ultraviolet rays to items and people in the car, reduce the temperature in the car through physical reflection, reduce the use of Fuel Car air conditioners, thereby reducing fuel consumption and saving some expenses. 1. Do not raise or lower the car window within 3 days after the Fuel Car film is applied 2. The thermal insulation film cannot be cleaned and the defogger line switch cannot be turned on within one week after the New Car film is applied 3. Do not use alcohol or ammonia solutions to clean the surface of the film 4. Do not use sharp objects to pry the edge of the film apart 5. If bubbles appear after the New Car film is applied, it must be handled at the construction shop within 24 hours 6. Do not let the air conditioner blow against the film to avoid severe thermal expansion and contraction. 7. Be careful when the Fuel Car film expires The shelf life of high-quality film is usually 5 years. Generally, after the shelf life, the owner should be careful not to handle it without authorization. It is recommended to go to a special construction shop for glue removal. For American films on the market, removing the glue is relatively easy and will not damage your glass, ensuring that your New Car will still be dazzling when you apply film again.

1. Matching materials with models Different materials for New Car grilles are suitable for different models. For example, high-end luxury cars usually use aluminum alloy to make car trims, while low-end models may use ABS or iron sheets. 2. Personal aesthetic tendencies Different people have different views on beauty, so when choosing materials, you should consider your personalized needs and choose a grille material that suits your aesthetic taste. 3. Quality and price For New Car grilles, the higher the material, the higher the price, so consumers need to choose the right material and price based on their needs for the product, personal aesthetics, and usage occasions. In short, the correct choice of New Car grille material can not only ensure the beauty and durability of Fuel Car, but also have a significant impact on the performance and efficiency of Fuel Car.

1. Aluminum alloy Aluminum alloy for Fuel Car has good corrosion resistance and light weight, and is more varied in shape, which is deeply loved by consumers. At present, among most New Car brands, New Car aluminum alloy grilles are widely used in high-end models. 2. Iron sheet Generally used in mainstream models, New Car iron sheet grilles are not only relatively cheap, but also very strong, but they are heavy and not suitable for new models that pursue lightweight. At present, most New Car models use chrome-plated iron sheet grilles. 3. ABS engineering plastics ABS engineering plastics are a copolymer composed of three monomers, with good mechanical properties and processing technology, as well as excellent high and low temperature resistance and aging resistance. ABS grille is a lightweight material suitable for small models that pursue lightweight.

We need to know the reciprocating motion of the piston in the cylinder to realize the cycle of gas intake, compression, exhaust and expansion. After the New Car piston is installed in the cylinder, the position must be correct and there must be a gap around the circumference to prevent the piston from rubbing against the cylinder wall. Therefore, it is necessary to check the uniformity of the circumferential gap of the New Car piston in the cylinder. Inspection method: Use a caliper to measure the cylinder diameter minus the piston outer diameter and divide it by 2 to get the theoretical gap. Use a feeler gauge to measure the circumferential gap and compare it with the theoretical gap to find out the cause of the gap deviation. It is usually hoped that the lower gap is larger than the theoretical gap, which is beneficial to the life of the support ring. Therefore, some European manufacturers lower the center hole connecting the piston (support ring) and the piston rod by about 1mm (according to the different values ​​of the piston diameter) to make the piston lift up in the cylinder, which is called an eccentric piston (the disadvantage is the positioning assembly of the piston). If the piston sinking value of Fuel Car is large, the reasons should be found out, such as the large gap between the crosshead and the slide plate, which causes the crosshead and the cylinder to be eccentric, etc. The cylinder is eccentric and worn. The connection between the cylinder body and the intermediate sleeve is misaligned, the connection surface between the new cylinder body and the intermediate body is not parallel, and the axis is not vertical. Corresponding measures should be taken.

Because aluminum pistons can withstand gas pressure, the connecting rod drives the crankshaft to rotate through the piston pin, so the top of the New Car piston is also a component of the combustion chamber. Generally, New Car pistons are divided into three types: diesel pistons, Fuel Car engine pistons, and general pistons. The piston bears high temperature and high pressure thermal loads and mechanical loads. Therefore, as a very important energy transmission component in New Car engines, the piston has special requirements for its materials: low density, light weight, good thermal conductivity, and small thermal expansion coefficient; and it has sufficient high temperature strength, wear resistance and corrosion resistance, and good dimensional stability. When the New Car engine is working, the piston is directly in contact with 2200℃ high temperature gas, and its top temperature is 300℃~400℃, and the temperature is uneven; in the power stroke, the top of the piston is subjected to a large gas pressure, which is 4MPa~5MPa for Fuel Car engines and 8MPa~9MPa for diesel engines, or even higher; in addition, the linear speed of the piston reciprocating in the cylinder can reach 11m/s~16m/s; working under such harsh conditions. The piston is subjected to high temperature, high pressure, thermal load and mechanical load. Therefore, as a very important energy transmission component in New Car engines, the piston has special requirements for its material: low density, light weight, good thermal conductivity, small thermal expansion coefficient; and sufficient high temperature strength, wear resistance and corrosion resistance, good dimensional stability. In addition, it should

It forms a piston group with piston rings, piston pins and other parts, and forms a combustion chamber with the cylinder head. It bears the pressure of the gas, transmits power to the crankshaft through the piston pin and connecting rod, and completes the working process of the internal combustion engine. The top of the piston is the main part of the combustion chamber, and its shape is related to the selected combustion chamber form. The piston, piston ring, piston pin, connecting rod and connecting rod bearing constitute the piston-connecting rod group. The piston-connecting rod group, as a transmission component of the New Car engine, converts the reciprocating motion of the piston into the rotational motion of the crankshaft, which acts on the piston. The power of the crankshaft is converted into the driving force for the rotation of the external output wheel of the crankshaft. The piston must be able to withstand the high temperature of combustion and the heat generated by friction, and can slide freely in the cylinder. Otherwise, the New Car engine will overheat and may be "stuck". On the contrary, if the fit clearance is too large, the piston will shake and hit. The piston works under high temperature, high pressure, high speed and poor lubrication. The piston is in direct contact with the high-temperature gas, and the instantaneous temperature can reach more than 2500K, with serious heat generation and poor heat dissipation conditions. Therefore, the temperature of the piston is very high when working, up to 600-700K at the top, and the temperature distribution is very uneven. The top of the piston of a Fuel Car is subjected to a large amount of gas pressure, especially the

The main role of the New Car engine piston is to withstand the combustion pressure in the cylinder and transmit this force to the crankshaft through the piston pin and connecting rod. 1. Sealing: refers to sealing the gas, preventing the gas in the combustion chamber from leaking into the crankcase, keeping the gas leakage to a minimum, and improving thermal efficiency. Leakage will not only reduce the power of the New Car engine, but also deteriorate the engine oil. This is the main task of the gas ring; 2. Adjusting the engine oil (oil control): scraping off the excess lubricating oil on the cylinder wall, while making a thin oil film on the cylinder wall to ensure the normal lubrication of the cylinder, piston and ring. This is the main task of the oil ring. In modern high-speed engines, special attention is paid to the role of the piston ring in controlling the oil film; 3. Heat conduction: The heat of the Fuel Car piston is transferred to the cylinder liner through the piston ring, which plays a cooling role. 70-80% of the heat received by the piston top in a non-cooled piston is dissipated by the piston ring to the cylinder wall, while 30-40% of the heat received by the cooled piston is dissipated by the piston ring to the cylinder wall; 4. Support: The piston ring keeps the piston in the cylinder, preventing the piston from directly contacting the cylinder wall, ensuring smooth movement of the piston, reducing friction resistance, and preventing the piston from knocking. Generally, the piston of a Fuel Car engine uses two air rings and one oil ring, while the diesel engine usually uses two air rings and one oil ring.

The use of New Car engine pistons also requires lubrication. What form of lubrication is used for New Car engine piston lubrication? The Fuel Car engine piston lubrication adopts splash lubrication. Let us introduce it in detail. The characteristics of splash lubrication are: the lubricating oil splashes to the upper part and the surrounding through the movement of the connecting rod and the crankshaft, and then the lubricating oil can be evenly covered on the cylinder wall through the reciprocating movement of the piston and the sliding of the oil ring, and will not enter the combustion chamber in large quantities. The lubrication required by the piston is mainly between the piston and the cylinder wall and the piston pin. Although the New Car engine piston is equipped with gas rings and oil rings to achieve better sealing, it is still impossible to completely avoid the occurrence of blowby and a very small amount of lubricating oil entering the combustion chamber. Under normal circumstances, it will not affect the New Car engine, but if it exceeds a certain amount, it will have an adverse effect on the Fuel Car engine, such as increased wear of the piston and cylinder wall, increased oil loss and aging, decreased power of the New Car engine, and increased fuel consumption. From this point of view, the most important thing for the effective lubrication of the piston is to have enough lubricating oil and replace it with qualified oil in time.

During the use of New Car pistons, they often encounter wear. Common damage to Fuel Car pistons includes wear of New Car piston ring grooves, wear of piston skirts, wear of New Car piston pins and Fuel Car piston pin seat holes. Let's take a detailed look at their specific wear. The New Car piston ring groove is the most severely worn part of the New Car piston. Usually the first ring groove is the most severely worn, and the wear degree of the second, third and fourth ring grooves decreases in turn. After wear, the cross section of the ring groove is trapezoidal, the outer width becomes narrower, and the side clearance increases, resulting in air and oil leakage in the cylinder, poor engine power performance, poor lubrication, and large carbon deposits in the combustion chamber. The main reason is that the gas pressure increases the unit pressure of the Fuel Car piston ring on the ring groove. Due to the high-speed reciprocating motion of the New Car piston, the New Car piston ring has a great impact on the ring groove. In addition, the high temperature of the combustion gas makes the working temperature of the New Car piston head higher. The closer to the top of the Fuel Car piston, the higher its temperature and gas pressure. So the first ring groove wears the most, and the wear of the subsequent ring grooves gradually decreases. The wear of the ring groove is mainly on the lower plane, and less on the upper plane, so that the ring groove is worn into a trapezoid with a small inside and a large outside, which increases the side clearance of the New Car piston ring and causes oil leakage. Due to the support of the Fuel Car piston ring, the New Car piston head rare

If the skirt of a New Car piston is round when it is cold, it will become an ellipse when it is working, making the circumferential clearance between the New Car piston and the cylinder unequal, causing the Fuel Car piston to get stuck in the cylinder, and the engine cannot work normally. Therefore, the piston skirt is made into an ellipse in advance during processing. The long axis direction of the ellipse is perpendicular to the pin seat, and the short axis direction is along the pin seat direction. In this way, the New Car piston approaches a perfect circle when working. The temperature of the New Car piston along the height direction is very uneven. The temperature of the New Car piston is high at the top and low at the bottom, and the expansion volume is also large at the top and small at the bottom. In order to make the upper and lower diameters of the New Car piston equal when working, that is, cylindrical, the Fuel Car piston must be made into a stepped or conical shape with a small top and a large bottom in advance. In order to reduce the heat received by the piston skirt, a horizontal heat insulation groove is usually opened on the skirt, and in order to compensate for the deformation of the skirt after heating, a longitudinal expansion groove is opened on the skirt. The shape of the groove is "T" or "Π" groove. The horizontal groove is usually opened below the lowest ring groove, on both sides of the pin seat on the upper edge of the skirt (some are opened in the oil ring groove) to reduce the heat transfer from the head to the skirt, so it is called a heat insulation groove. The vertical groove will make the skirt have a certain el