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A car is composed of many parts and components. Each part plays a different role. It also needs to be processed through different processing techniques before it can be installed on the car for use. What are the parts processing technology?
1. Forging and processing of auto parts
In the automobile manufacturing process, forging is widely used. Forging methods are divided into free forging and model forging. Free forging is a processing method in which a metal blank is placed on an anvil and subjected to impact or pressure (known as "ironing"). The blanks of automobile gears and shafts are processed by free forging.
In the automobile manufacturing process, forging is widely used. Forging methods are divided into free forging and model forging. Free forging is a processing method in which a metal blank is placed on an anvil and subjected to impact or pressure (known as "ironing"). The blanks of automobile gears and shafts are processed by free forging.
2. Casting and processing of auto parts
Casting is a production method in which molten metal is poured into the cavity of a mold and cooled and solidified to obtain a product. In the process of automobile parts processing and manufacturing, there are many parts made of cast iron blanks, which account for about 10% of the total vehicle weight, such as cylinder block, transmission case, steering gear housing, rear axle housing, brake drum, various Brackets and so on.
Casting is a production method in which molten metal is poured into the cavity of a mold and cooled and solidified to obtain a product. In the process of automobile parts processing and manufacturing, there are many parts made of cast iron blanks, which account for about 10% of the total vehicle weight, such as cylinder block, transmission case, steering gear housing, rear axle housing, brake drum, various Brackets and so on.
Sand molds are usually used to manufacture iron castings. The raw material of the sand mold is mainly sand, mixed with binder, water, etc. The sand material must have a certain adhesive strength so that it can be molded into the required shape and can withstand the erosion of high-temperature molten iron without collapsing. In order to mold a cavity in the sand mold that matches the shape of the casting, wood must be used to make a model, which is called a wooden mold. After the hot molten iron is cooled, the volume will shrink. Therefore, the size of the wooden mold needs to be increased according to the shrinkage rate on the basis of the original size of the casting, and the surface that needs to be cut is thickened accordingly.
3. Welding processing of auto parts
Welding is a processing method in which two pieces of metal are locally heated or heated and pressurized at the same time. We often use the welding method in which workers hold the mask in one hand and the welding tongs and electrodes connected to the wires in the other hand is called manual arc welding, which uses the high temperature generated by arc discharge to melt the electrodes and weldments to join them.
Welding is a processing method in which two pieces of metal are locally heated or heated and pressurized at the same time. We often use the welding method in which workers hold the mask in one hand and the welding tongs and electrodes connected to the wires in the other hand is called manual arc welding, which uses the high temperature generated by arc discharge to melt the electrodes and weldments to join them.
Manual arc welding is not widely used in automobile manufacturing. Spot welding is widely used in automobile body manufacturing. Spot welding is suitable for welding thin steel plates. During operation, two electrodes apply pressure to the two steel plates to bond them together, and at the same time, the bonding point (circular with a diameter of 5-6 kelvin) is heated and melted to be firmly bonded. When two body parts are welded, their edges are welded at a point every 50-100 to make the two parts form a discontinuous multi-point connection. To weld the entire car body, usually thousands of solder joints are needed. The strength requirements of the solder joints are very high. Each solder joint can withstand a tensile force of 5kN, even if the steel plate is torn, the solder joints cannot be separated.
