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  • What are the stamping parts on the car body?

    2020-02-14 11:35:05
    Stamping is mainly classified by process, which can be divided into separation process and forming process. The purpose of the separation process is to separate the stamping parts from the sheet along a certain contour line and ensure the quality requirements of the separation section. The purpose of forming process is to make the sheet metal plastic deformation without breaking the blank, and to make the required shape and size of the workpiece. In actual production, it is often a variety of processes applied to a workpiece. Punching, bending, shearing, stretching, bulging, spinning and straightening are the main punching separation processes.
  • Do you know the selection principle of stamping parts in automobile industry?

    2020-01-19 16:32:50
    A large number of cold stamping processes have been used in the production of automotive stamping parts, which are suitable for the needs of many varieties and large-scale production of automotive stamping parts industry. In medium and heavy-duty vehicles, most of the covering parts, such as body outer panel, and some load-bearing and supporting parts, such as frame, carriage and other auto parts are automobile stamping parts. The steel used for cold stamping is mainly steel plate and steel strip, accounting for 72.6% of the total steel consumption of the vehicle. The relationship between cold stamping materials and the production of automobile stamping parts is very close. The quality of automobile sheet metal materials not only determines the performance of the product, but also directly affects the process design of automobile stamping parts, and affects the quality, cost, service life and production organization of the product. Therefore, reasonable selection is necessary Using materials is an important and complex work.
  • Introduction of metal cutting processing method for auto parts

    2020-01-18 09:50:41
    Metal cutting is a kind of machining method that uses the cutter to cut the metal blank layer by layer and make the workpiece get the required shape, size and surface roughness. Metal cutting includes two methods of benchwork and machining - benchwork is a machining method that workers use hand tools to cut. It is flexible and convenient to operate and widely used in assembly and repair. Machining is accomplished by means of machine tools, including turning, planing, milling, drilling and grinding.
  • Do you know how auto parts are cold stamped?

    2020-01-17 16:28:44
    Daily necessities, such as aluminum pot, lunch box, washbasin, etc., are made by cold stamping. For example, to make a lunch box, you first need to cut a rectangular blank with four rounded corners (known as "blanking") and then use a punch to press the blank into a die to form (known as "drawing"). In the drawing process, the flat sheet becomes a box shape, with four sides vertically bent upward, and the materials at four corners gather and wrinkle can be seen.
  • What's the difference between casting and forging automobile parts?

    2020-01-16 16:26:09
    Sand mold is usually used to make iron castings. The raw material of sand mold is mainly sand, which is mixed with binder and water. The sand mold material must have a certain bonding strength, so as to be molded into the required shape and be able to resist the erosion of hot metal without collapse. In order to form a cavity in the sand mold which is consistent with the shape of the casting, the wood mold must be made first. The volume of hot molten iron will be reduced after cooling. Therefore, the size of the wood mold needs to be increased according to the shrinkage based on the original size of the casting, and the surface to be machined should be thickened accordingly.
  • What do you know about the assembly process of auto parts?

    2020-01-15 09:54:37
    Whether the parts are combined into parts or the parts are combined into the whole vehicle, the mutual cooperation relationship specified in the design drawings must be met to make the parts or the whole vehicle achieve the predetermined performance. For example, when assembling the transmission to the clutch housing, the centerline of the transmission input shaft must be aligned with the centerline of the engine crankshaft. This centering method is not adjusted by the fitter (fitter) during assembly, but is guaranteed by the design and manufacturing.
  • What is the function of modified plastics in auto parts?

    2020-01-14 09:52:24
    Modified plastics are based on general plastics and engineering plastics. Through adding modifiers, filling, blending, strengthening and other methods, they improve the flame retardancy, strength, impact resistance and toughness of plastic products. Modified plastics are widely used in automobile industry because of their unique properties that other materials do not possess. With the increasing requirements of automobile lightweight, energy saving and environmental protection, the amount of automobile modified plastics is increasing year by year. In October 2016, China Society of automotive engineering released the energy saving and new energy vehicle technology roadmap. The roadmap points out that by 2020, 2025 and 2030, the vehicle mass needs to be reduced by 10%, 20% and 35% respectively compared with 2015. Modified plastics for automobile mainly include polypropylene, polyurethane, ABS materials, HDPE, polycarbonate, nylon, etc. According to the data, China's total plastic production increased from nearly 18 million tons in 2004 to nearly 80 million tons in 2016, and the modification rate increased from 8% to 19%. However, compared with 40% of the world's modified plastics used in the automobile industry, only about 10% in China. In late November 2016, it is expected that in the next few years, the automotive industry will become a fast growing area of China's modified plastic consumption. It is estimated that China's annual output of automobiles will reach 30 million in 2021. According to the conservative usage of each 300 kg automobile modified plastic, the compound annual growth rate of automobile modified plastic industry will exceed 26% in the next five years. In the next few years, the upgrading of polyolefin and modified plastics products in petrochemical and coal chemical industry needs to focus on the automotive plastics market.
  • Can anti-collision beam (auto parts) really guarantee the safety of people inside the car?

    2020-01-13 09:49:55
    Automobile anti-collision beam is by no means the fundamental factor to ensure the safety of the people in the car, but it is meaningful to the safety. Its role is reflected in the low-speed collision, and in the high-speed accident, automobile parts anti-collision beam is powerless. Compared with the body longitudinal beam and stiffener, the strength of the crash beam is not worth mentioning. What really saves your life at this time is to try to keep the cockpit intact. Therefore, we should treat the anti-collision beam rationally.
  • What should we pay attention to when checking the balance of auto parts?

    2020-01-10 09:47:50
    The body structure of each car must go through the quality inspection after the production line. Generally, the laser and scanning methods are used to check the stability of each welding point and metal structure. For example, the 360 automatic body measurement technology (auto CMM) we use is to verify the quality of the car body after it is offline.
  • How to detect the crack of auto parts?

    2020-01-09 09:41:29
    The methods to inspect the cracks of the parts include magnetic flaw detection, fluorescent flaw detection and aerosol flaw detection. For the cast parts such as water-cooled cylinder block and cylinder head, cracks are often found by water pressure test. For some hidden cracks on the surface of shaft parts, the method of immersion knocking can also be used to find cracks.
  • How to detect the wear of auto parts?

    2020-01-08 10:26:40
    The inspection of automobile parts is an important process in the process of automobile overhaul, which will directly affect the quality and cost of automobile repair. Through inspection, automobile parts can be divided into three categories: available, to be repaired and scrapped.
  • What are the processing characteristics of metal automobile stamping parts in the market?

    2020-01-07 10:21:27
    The welding method of stamping parts is generally determined by their volume, welding position and structure of welding stamping parts, generally including overhead welding, flat welding, vertical welding and horizontal welding. Among the four welding methods, the complicated one of Zui is overhead welding. In the process of overhead welding, Zui short arc and small diameter electrode are used, so it is very difficult.
  • What are the ways to prevent the damage of stamping parts of hardware vehicles?

    2020-01-06 10:17:10
    Measurement method of hardware stamping parts: for hole measurement of hardware stamping parts, the small value of Zui is taken according to the measurement method of go no go gauge. Generally, the small value of Zui can be recorded when measuring with caliper (excluding the small value, such as the error caused by measurement error), (not excluding the special situation) the large value of Zui recorded has no practical significance with the average value, and it is significant for the measurement of hole diameter in all directions Small differences should be recorded in the roundness of the geometric tolerance, not in the hole diameter.
  • How about the processing performance of precision metal automobile stamping parts?

    2020-01-03 10:12:22
    Metal stamping is a kind of technology that uses punch and die to deform or fracture iron, aluminum, copper and other plates and dissimilar materials to achieve a certain shape and size. Metal stamping is sometimes called sheet forming, but it is slightly different. The so-called plate forming refers to the use of plates, thin-walled tubes, thin profiles, etc. as raw materials.
  • What should be paid attention to in the manufacturing process of all steel cab?

    2020-01-02 10:31:12
    With the promotion of domestic heavy charging and overload control, lightweight models are more and more popular. Various lightweight trucks known as Zui light in the history of history are constantly stimulating people's eyes. I believe that many people will have such a doubt in their hearts. Is the lighter the car, the lower the safety?
  • What is the key to design the stiffener of automobile sheet metal parts?

    2019-12-31 10:28:49
    Stiffeners are widely used in the manufacturing industry, as well as in the automotive industry. Many car body sheet metal are equipped with stiffeners, except for the appearance surface with special requirements. The role of stiffeners is to enhance the strength and stiffness of some areas, improve the characteristics of noise, vibration and acoustic vibration roughness (NVH). In addition to the important parts, the daily installed stiffeners have little impact on the use of vehicles, so the design and application of stiffeners in the automotive industry are not as good as the collision ability, lightweight and other similar functions, which have received too much attention. In addition, the stiffeners on automobile sheet metal include automobile and mechanical properties, which are rarely involved in all kinds of automobile and mechanical data. Therefore, although there are many applications of stiffeners in automobile, the research is not in-depth.
  • Can you understand the repair skills of automobile sheet metal parts?

    2019-12-30 10:26:34
    To some extent, the quality of car repair affects the actual use of the car, but also related to the life safety of drivers and passengers. Therefore, the auto repair shop needs to constantly improve its own repair technology, improve repair standards, so as to ensure the safety of maintenance vehicles.
  • What is the operation flow of auto body parts painting?

    2019-12-27 10:23:35
    In case of scrape and collision accident, the owner of the car should go to the special repair shop for repair. Because the maintenance personnel there are all trained and have the standard size of professional equipment, tools and body, the structure of the car will not be damaged during the repair process. After the vehicle is repaired, check the repair quality.
  • How to effectively prevent chip jumping of automobile stamping parts?

    2019-12-26 10:20:28
    Chip skipping of stamping parts refers to the phenomenon that the scraps that are punched into the edge of the die are brought out of the die surface by the punch when the precision metal die is being cut at high speed. Its existence will crush strip or stamping parts, thus affecting product quality, shortening die life and reducing production efficiency, which is the "big taboo" of high-speed continuous blanking production.
  • How to determine the dimensional accuracy of automotive stamping parts?

    2019-12-25 10:32:49
    In the production process of metal stamping parts, we will encounter the situation that the punch size is too large or too small and the difference between punch size and punch size is large. In order to solve this problem, we should not only consider the planning size, processing accuracy and blanking clearance of forming punch and die, but also think about the following aspects.
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