When it comes to modifying their own car, many people think that it is better to change the wheel. But when I went to the modification shop, I saw a dazzling array of styles, but I didn't know how to choose. Today I will give you a brief introduction to the difference between these two production processes, so that you can choose the product that suits you.
Casting
Let's talk about the more economical and affordable cast wheels. There are currently three methods for manufacturing cast wheels on the market: gravity casting, low pressure casting and casting spinning. The differences in wheel hubs under different casting technologies are also large.
1. Gravity casting. Gravity casting sounds good, but it's actually very general. The gravity casting process is very simple. The process of gravity casting is very simple. The high temperature liquid alloy is introduced into the mold to cool and shape, and then it is formed by the gravity of the liquid metal. Well there is no more. It's so simple and crude. The advantages of this process are that the mold is durable, the construction is simple, and the price is the lowest among all methods. It feels like digging a pit as a mold can be a factory manager. Disadvantages The density of each part of the hub is uneven, and the molecular pores in the metal are large, and the natural strength is also reduced. A vivid example is that the hair cake that is usually eaten is hard or the brick is hard. Under special circumstances, it is easy to break due to uneven force on the hub. Rift situation.
2. Low pressure casting uses low pressure to evenly pour the liquid alloy into the mold. The advantage is that the liquid metal poured into the mold can maintain a relatively average and stable density, and the pores will be much smaller than gravity casting. Moreover, low-pressure casting can be fully mechanized, and the defective rate is very low, so it is suitable for large-scale commercial production, if this is the manufacturing process of most original automobile wheels.
3. Casting spinning, the name must be split into two halves, casting is to use the previous two casting methods, gravity or low pressure, first make the embryonic shape of the wheel hub, and then use special equipment to secondary process the casted wheel hub , Carrying out rotary stamping to further strengthen the density of the wheel hub material and achieve higher strength requirements. This is also a star product promoted by major domestic refit wheel manufacturers, which can withstand the test of the track level.
Forging
After talking about casting wheels, let’s introduce the relatively high-end and stronger forged wheels. Before it becomes an expensive wheel, it has to go through many complicated processes. The first step is to heat and soften the aluminum material used to make the wheel. The steel circular mold is repeatedly stamped to achieve ultra-high metal density, and then the compacted blank is processed into various wheel styles in the finishing process, which is also divided into single-piece and multi-piece, compared with casting Forging has lighter weight and higher strength. The disadvantage is also obvious that it is too expensive. For the price of forging, you can buy 3 to 4 cast wheels with similar styles.
Having said so much, to make a simple summary, cast wheels have a certain degree of toughness and are not prone to fracture but are prone to deformation when impacted. They are cheap and can meet daily safe driving. The disadvantage is that the heavier weight affects the performance of the vehicle, which affects acceleration and deceleration, and fuel consumption. It will have an impact, but since the decision to modify and the budget is limited, it is recommended to purchase a set of spin-cast wheels, which are both cheap and comparable to forged wheels.
Forged wheels have a lighter weight to give play to the vehicle's better handling and sportiness, and higher strength makes intense driving safer. The final choice depends on your own wallet. The quality of the wheel hub is related to driving safety, and you should not buy low-quality products cheaply.
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