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Found 12 results

  1. 袁春凤 (Tiffany)

    Friction of automobile parts

    The phenomenon that two objects move relative to each other to produce motion resistance between their contact surfaces is called friction, which is called friction. The existence of friction not only increases the power consumption, but also causes the wear of parts' contact surfaces. Therefore, lubricating oil is usually used between the relative moving surfaces of automobile parts to reduce friction. Failure of automotive parts 75% is caused by friction. Friction can be divided into dry friction, liquid friction, boundary friction and mixed friction according to the lubrication state of the parts. (1) dry friction The friction between the frictional surfaces without any lubricating medium is called dry friction. When the parts are in the state of dry friction, the surface of the parts is abraded sharply, so the surface of the moving parts of the automobile should avoid the occurrence of dry friction as far as possible. Dry friction and boundary friction are the main friction between the upper part of cylinder wall and piston ring. Dry friction will occur when the journal and bearing are subjected to impact load in the working process. (2) liquid friction Two the friction of the friction surface when the lubricant is completely separated is called liquid friction. In liquid friction, the two friction surfaces are completely separated by a layer of lubricating oil film with a thickness of 1.5-2.0um, which avoids direct contact between the working surfaces of the two parts. Friction only occurs between the lubricating fluid molecules, so the friction resistance is very small, and the wear of the parts is very slight. Most of the relative motion parts of a car are carried out under the condition of liquid friction (for example, crankshaft and bearing). (3) boundary friction Two friction surface separated by a very thin boundary film is called boundary friction. The oil film thickness is usually below 0.1um. Friction only occurs between the outer molecules of the boundary film, reducing the friction and wear of the parts. But its thickness is very small, and it is easy to be destroyed by impact and high temperature, so it is not as reliable as liquid friction. For example: between cylinder wall and piston ring; if the work crankshaft and journal between the insufficient supply of lubricant, easy to produce boundary friction. (4) Mixed friction The friction between two friction surfaces in the presence of dry friction, liquid friction and boundary friction is called mixed friction. In the actual working state, the parts usually work under the mixed friction state, and the friction state varies with the working conditions.
  2. 袁春凤 (Tiffany)

    Melt mold casting

    Melt mold casting One is to make the wax into a mold, coat it with several layers of refractory paint to make a mold shell, and then heat the mold, so that the mold melt, flow out, and baked into a certain strength mold, and then poured, shell and get a casting method. Process features: take the melting pattern as the starting mode. The precision of casting is high, and it is a method of little cutting. Its equipment is simple and production quantity is not restricted. It is mainly used for mass production and mass production. The drawback is that the process is complex and the production cycle is long. Pressure casting - a casting process in which molten metal is rapidly pressed into the cavity of a metal mold under high pressure and solidified under pressure to obtain a casting. Process characteristics: High speed and high pressure were added to the metal mold casting to enhance the metal fluidity, which was mainly used in the batch production of non-ferrous alloy (such as aluminum, copper, magnesium, etc.) precision castings. Centrifugal casting - a casting process in which molten metal is poured into a high-speed rotating mold to solidify liquid metal under centrifugal force to obtain a casting. Process features: compact structure, good casting quality. It is used to produce hollow castings.
  3. Erica Zhu Feilong Jiangli

    What are auto parts?

    Automobile parts refer to the components of each unit of the automobile and all consumable materials serving the automobile. They can be divided into automobile parts, Automobile standard parts and automobile materials. The following is a detailed introduction. (1)Auto parts are divided into parts, assemblies, component, and body panels. Parts: the basic manufacturing unit of a car. It is an integral part that can no longer be disassembled. Such as: piston ring, piston, valve, impeller and so on. Assembly: a combination consisting of more than two parts and acting as a single part. For example, a connecting rod with a cover, a pair of bearing shells, and a cylinder head with a valve guide. Component: a combination consisting of several parts or assemblies, but can not function independently. For example, transmission cover, cooler cover, automobile steering connector, water pump and so on. Sometimes it is also called "half assembly". Body panels: formed by sheet metal stamping, welding, and covering automotive body parts such as: radiator cover, leaf plate, etc. (2) automotive standard parts Designed and manufactured according to the national standards, the same parts are unified in shape, size, tolerance, technical requirements, and can be used in a variety of instruments and equipment, and interchangeable parts are suitable for automotive standard parts such as bolts, gaskets, pins, keys, etc. (3) automotive materials Automobile operating materials, such as various oils, solutions, automotive tires, accumulators, standard bearings (non-special), etc. Most of the products produced by non-automotive industry and used by automobiles, generally not included in the catalogue of various types of automotive accessories, also known as "horizontal products". https://s1.ax1x.com/2018/08/22/Po50z9.jpg
  4. Fatigue life prediction of rubber bushing in vehicle system 1.Response analysis of rubber bushing under random excitation The Monte Carlo method is used to simulate the random excitation spectrum. 2. The fatigue life calculation of rubber bushing under random load can calculate the maximum strain energy density of rubber bushing under different excitation by using the response characteristics of rubber bushing under engine and road excitation obtained previously. The fatigue life of rubber bushing can be calculated under different load conditions. The maximum strain energy density U = 0.5134Nmm2 and the fatigue life N = 771371 were predicted under the excitation of engine speed n = 3000r/min and class B pavement, while U = 0.6893Nmm2, N, = 146774 under the excitation of engine speed n = 3000/min and class D pavement.(Thanks for the help and support of Chongqing Feilong Jiangli Auto Parts technical department.) 3. The test verification of the front sub-frame module is expensive because of the fatigue test of the whole vehicle system. Now the former sub-frame module is the research object, and the calculation results are compared with the test results. The front sub-frame is installed in accordance with its layout in the vehicle, and the six points connected with the body on the sub-frame are restrained. Sinusoidal excitation is carried out at the midpoint of the rear beam, and the maximum frequency which can be reached under the condition of satisfying the amplitude of the force is taken as the test frequency. The amplitude of force is 2.45.2kN. Fatigue failure criteria of rubber bushing: 2mm crack (equivalent to 20% of tensile coefficient).
  5. Rubber bushing is mainly used in the position of automobile front and rear suspension and other frequent vibration. It plays a vital role in the whole vehicle NVH (Noise Vibration Harshness), and it will be invalid and will affect the whole vehicle noise and driving stability. The failure mode of rubber bushing is not only its own quality control, but also its working environment is one of the key factors affecting its life. Thanks for the support of the Feilong Jiangli technical department. Automobile suspension is a component that connects the frame (or body) with the axle (or direct and wheel). Its main functions are: D mitigates and inhibits vibration or shock caused by uneven pavement to ensure the car has good smoothness; 2 (2) rapidly attenuates the vibration of the body and axle (or wheel); 3 (3) transfer function in the wheel and frame (car) Various forces (vertical force, longitudinal force, transverse force) and moments (braking moment and reaction moment) between the body; 4) to ensure the necessary stability of the vehicle.
  6. The measuring rod part of the oil gauge The measuring rod part of the oil gauge generally has three structures: steel wire, steel belt (Bian Chi), and many winding wires. Among them, spring steel wire is commonly used in steel wire structure, and the material is hard, which is suitable for the relatively slow bending ruler tube. The multi strand wire is easy to insert and plugged in the bending scale tube, but the price is higher. The material of flat ruler generally chooses 0.8mm~1.2mm stainless steel strip, and the price is relatively low. As the core part of the ruler, the head of a ruler is the most important part of the ruler. In the drawing, it is easy to rub with the ruler tube that matches with it. The particles produced by the friction will fall into the lubricating oil. The unclean lubricating oil will cause great wear to the bearings of the engine. In the indicator part of the scale, the head can be designed as a roller structure, which is not only effective. The scale has reduced the tube pulling force of the ruler and reduced the scraping of the ruler head and the ruler tube. For the oil gauge with steel strip structure, in order to make the gauge clearly indicate the position of the liquid level, it is easier for users to read the oil gauge. Generally, the head of the flat ruler is treated with sand blasting or press mesh, and some rhombic pits can be set on the head of the plastic. These pits are disconnected from each other, so that the oil can climb up the trough under the siphon effect, which affects the accurate reading of the scale.
  7. The rubber material determines the service range and service life of the rubber soft connection. Different rubber materials correspond to different medium environments, and the use of rubber materials not suitable for pipeline circulation media greatly shortens the use effect of the rubber soft connection, which may also have a great impact on the service life of the whole pipeline. Chongqing Feilong Jiangli has many years' experience in manufacturing rubber auto parts. Pls feel free to contact me if you have any interest in us. [email protected]
  8. When calculating the scale of the oil scale, it is best to choose the flange face of the ruler tube. The reason why the flange is chosen as the measuring reference is that the ruler's position in the engine is completely determined by it. (1) B is the length of the axis of the ruler. After the scale tube is arranged on the engine, it can be directly measured from the digital module. (2) C is the length of the ruler tube inserted into the flange installation surface. The length is set according to the length of the ruler. If the condition is allowed, it is best to keep the ruler to protect the head of the ruler, so that the measuring head of the ruler is parallel to the wall of the ruler, and the scraping of the scale section of the ruler is reduced. (3) D is the value from the flange surface to the maximum scale, corresponding to L1 in Figure 6. Similarly, the value from the flange surface to the minimum scale is L2. It is easy to get the theoretical distance of the ruler: the distance between the handle of the ruler and the mouth of the ruler to the maximum level of the level of the level of the level of the oil level: AMAX=B-C+L1, the same, the distance between the yardstick and the ruler's pipe mouth to the minimum level of the level of the level of the oil level: AMIN=B-C+L2.
  9. (1) Complete the modeling of the oil storage space in the lubrication system according to the relevant parts of the lubrication system. (2) Through the automatic measurement function of ProE software, the oil storage volume of oil pan is cut to find the defined volume at the normal loading angle. It is assumed that the maximum oil injection amount of an engine is 5L (3) Assuming that the ruler's direction in the ruler tube is consistent with the direction of the ruler tube, the mark value of the maximum scale of the oil scale is to select (2) the intersection point of the middle line of the liquid level and the ruler tube. Note the distance from the flange flange to the maximum liquid level from the scale tube L4. (4) similarly, according to steps (2) and (3), the measured minimum oil capacity is defined L2 L1 and L2 are the values of maximum liquid level and minimum liquid level calculated by scale theory.
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  11. Structure of water pump The water pump used in automobile engine is centrifugal water pump, which consists of shell, impeller, bearing, pump shaft, water seal and transmission belt wheel. (1) water pump housing is made of cast iron or cast aluminum. The wall of cast iron case is thick and its quality is large. With the improvement of the requirement of engine lightweight, only some large engines of commercial cars are still using the pump of cast iron case. Many cast iron cases also have some water channels and thermostat installation rooms, which further increase the weight of the case. Most water pumps in cars use cast aluminum shells, and the size of the shells is getting smaller, many of the shells no longer have the function of water channels. (2) the impeller of the impeller pump is made of metal or engineering plastics, such as cast iron. The impeller is made of semi-circular arc, double circular arc or multi-circular arc blades that bend backwards. Pump impeller made of cast iron is of high quality, but its mechanical strength is high. The plastic impeller is easy to realize miniaturization and lightweight, and has good corrosion resistance and easy shape processing. Therefore, more and more car engine pumps use plastic impeller. (3) bearing water pump bearing is an important part of water pump, and the failure of a considerable part of water pump is caused by the damage of water pump bearing. As the engine gradually develops towards high power, the pump bearing needs to have higher thermal stability, greater bearing capacity and better sealing, so some automobile pumps use axial bearing. Shaft bearing is actually a kind of double supported bearing with simplified structure. Two supporting bearings have no inner ring. The raceway of the rolling body is directly processed on the pump shaft. Under the same bearing capacity, the size of shaft bearing is smaller than that of general type bearing. Under the condition of the same size, the bearing capacity of shaft bearing is greater than that of general type bearing. (4) pump shaft pump shaft is generally made of forged steel. The pump impeller is installed on one end of the pump shaft, which is supported on the pump housing by bearing. The other end of the pump shaft is equipped with a transmission belt wheel, which is driven by the engine crankshaft through toothed tape or v-shaped tape. (5) water seal is used to seal the cooling fluid so as to avoid leakage. Meanwhile, the cooling fluid is separated from the pump bearing to protect the bearing. At present, two-layer ceramic water seal has been widely used in water pumps. Two ceramic water seals installed on the same axis are pressed together by a spiral spring. Compared with rubber water seal, ceramic water seal is more wear-resistant and has a longer service life, but it is also prone to abrasion by hard particles in the cooling fluid. Although the processing of water seal has been improved continuously, water seal damage caused water pump leakage is still the main reason for water pump damage. (6) according to the tooth shape of the belt, the belt wheel can be divided into toothed belt wheel and v-shaped belt wheel. With less and less transmission tape on the engine, more and more pumps share one toothed belt drive with generators, air conditioning compressors, steering pumps, etc. Therefore, more and more toothed transmission belt wheels are added.
  12. AdvanceAP

    Advance Auto Parts

    Advance Auto Parts is Australia’s leading used car parts or vehicle parts supply company. We have been in the automobile industry for over two decades and we have spearheaded car removal and cash for cars services in Melbourne and many of its surrounding suburbs. We sell auto parts online from car accessories to engines and transmissions. We are the auto parts company that has the widest inventory in Melbourne. Contact our auto parts store for all your spare parts needs.
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