Wprowadzenie grzejnika spawalniczego i jego technologii
Welding radiator is a heat dissipation product produced with welding process as the main process.
After more than ten years of development, soldering radiators has evolved from brazing as the main process in the early days to now using soldering as the main process for this type of radiator. Soldering is also traditionally called soldering. This type of welded radiator combines the two parts of the bottom plate and the fins of the radiator by welding. The soldering process is widely used. As long as the surface can be soldered and can withstand a certain temperature, it can be soldered. The most commonly used materials for welding radiators are mainly copper and aluminum.
From the comprehensive consideration of cost, structure, performance, heat transfer and cost, copper and aluminum are the most widely used. From welding the bottom plate and fins of the radiator, combining the two most commonly used materials of copper and aluminum, according to the welding combination method, it can be divided into the following four categories:
The first type, aluminum fins plus aluminum bottom plate welded together can form an all-aluminum welded radiator. The all-aluminum welded radiator has several characteristics:
(1) high tooth density;
(2) weight of the radiator light. In addition, its heat dissipation effect has also been improved, because the heat dissipation effect of the radiator is proportional to the heat dissipation area under certain working conditions. The larger the heat dissipation area, the better the heat dissipation effect. Therefore, the density of the teeth is increased, thereby increasing the heat dissipation area, so its heat dissipation effect is improved.
In the second category, a copper base plate plus copper fins are welded together to form a pure copper radiator. The K value of copper's thermal conductivity is more than twice that of aluminum, so its heat transfer performance will be better. In the heat dissipation problem that is difficult to solve with aluminum, you can choose to use copper to solve it. However, pure copper radiators have some drawbacks. For example, the hardness of copper is relatively low, the weight of copper is heavier, the density is more than twice that of aluminum, and the price is more than twice that of aluminum.
The third type, aluminum fin plus copper base plate can be welded into a welded radiator of copper base plate and aluminum sprocket. The characteristic of this type of radiator is that it takes into account the good heat transfer and temperature uniformity of copper, as well as the light weight of aluminum, and the relative cost. The advantage is lower and better bonding strength.
The fourth type uses aluminum base plus copper fins, which can solve the problem of finer processing on the floor, and the processed products have relatively higher structural strength.
In addition to the free combination of welding methods, there are also many different forms of welding radiators on the fins. The commonly used processes are mainly the following three:
One kind is called organ piece. The processing technology of this kind of fin is to use a piece of metal tape (copper or aluminum) to fold back and forth through an automatically set device. It can be folded long and cut according to requirements. A kind of stacked structure like the Great Wall. The characteristic of this kind of organ piece is that after welding on the bottom plate, the whole heat sink is a whole, abuts each other, is lighter, and has a certain structural strength, so in application, it is often used when there are weight requirements and frequent contact changes. (For example, often plugged in) on the radiator, for example, vertical plug standard chassis.
The other is called single-folding. In this type of product, each tooth is punched out separately, and then the bottom surface is folded at an angle to form an "L" shape, or without folding. According to different requirements, It can be fully enclosed or semi-enclosed. This kind of craft is especially suitable for this kind of products which are multi-variety, small batch, fast manufacturing, and low cost in the early stage. The third type is called snap-fitting. This manufacturing method is to punch out one by one during punching. After punching, a fastener will be automatically added. After the punching is completed, a combination of heat sinks will be formed, something like in the middle. The zipper pulls it up to form a complete combination, so it is manufactured on a large scale, the welding efficiency is very high, and the cost is relatively low. However, because it needs to make a mold, the cost in the early stage of trial production is relatively high, and the cycle is long.
