You don't know the secret of the heat sink manufacturing processes

An air cooled cooling products, the effect of good or bad in addition to the fan to see the air volume, more is dependent on the design of the heat sink. A properly designed heat sink can make the computer run stably when it is not overclocked and not continuously full. It can be seen that the importance of the heat sink, and the heat sink heat dissipation effect and its production process is inseparable.

Nowadays, the production process of heat sink includes several technologies such as cutting, skiving, extrusion, stamping and die casting, etc., and more than ten kinds of specific heat sink manufacturing processes have been developed. In the following article, small make up will be for you one by one, let you in the choice of cooling products do know.

Cutting and aluminum extrusion

Strictly speaking, cutting is the abbreviation of a large class of production technology, such as high-speed cutting, laser cutting belong to this class, but they have a common point is the car, drilling, milling, grinding and other machine tools, in the heat heat sink fin forming process, in order to obtain some more special, fine shape, need to use cutting technology. Mainly used for plate forming (base, fin formation), heat sink grooves, special lines and so on.

Aluminum extrusion is will aluminum alloy ingot heating to 520 ~ 540 ℃, using mechanical pressure, the liquid aluminum through the extrusion die made of steel, in the mold exit to the cooling of liquid aluminum, rapid solidification, become a continuous parallel structure of heat sink in the early embryo, again to clip the early embryo, and he saw us common extruded heat sink.

Precision skiving and aluminum die casting

I have to say, this is a very landmark metal forming process. The definition of precision skiving is to cut a whole piece of metal profile according to the need, using a special planer with precise control to cut out the specified thickness of thin slices, and then bending up to an upright state, as a skived fin.The easier way to think about it is to take a piece of metal and cut it into the shape of a heat sink that we normally see.This method is most common in the pure copper heat sink.

Aluminum die casting is a widely used single aluminum alloy processing process. After melting the aluminum alloy ingot into a liquid state, it was filled into the model, and formed by die-casting machine in one time, and then after cooling and subsequent treatment, it was made into a single die casting heat sink.

Folding and soldering is the mainstream

The thin, dense heat sinks that we see are made in this way. In forming, the edges of the fins are left with a small specially designed bulge, which is fixed in a custom-made mold, and the bulge is bent and locked together to form an orderly arrangement of parallel fins. In combination with stamping, it is mainly used to manufacture parallel dense thin fins for reflow soldering or air duct design.

Soldering is a familiar way of metal processing. The most commonly used soldering method in heat sink processing is reflow welding, also known as reflow welding. At present, most of the heat pipe heat sink, heat pipe and fin connection is welding. Because the joint degree of welding directly affects the heat dissipation effect, the cost of welding is higher.

A variety of heat sink technologies.

Actually we in addition to the above these cooling process forms, as we can often see cold forging, bonded fin, and other heat sink technology, the process is more or less still appear in our computer cooling form, just for the cost or the cause of the heat dissipation effect is less and less, but these are still for heat sink has played a contribution to the development of technology.