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The Skiving Technology Of Aluminum Heat Sinks And Copper Heat Radiators

2021-07-17


Background for techniques : The skiving heat sink breaks through the limitation of thickness-length ratio of conventional radiators, and can produce radiators with high density. The fin plate and the base are integrated, without any interface impedance problem, and the heat dissipation effect is very good, which is close to the aluminum extrusion radiator, and is widely used in photovoltaic industry, electric vehicles, inverters and communication products.


The processing technology of the skiving fin radiator is to skived out the fin pieces one by one and erect them on the aluminum alloy plate with a special cutter (skiving). Most of the aluminum alloy aluminum plates are 1060 aluminum alloy and Copper 1020, with hardness of 24-38hb, plate width of 50-500mm, maximum fin height of 100mm and fin thickness of 1mm. There are also extruded plates made of 6063 aluminum alloy, with hardness of about 34-42hb, the highest tooth height of 50mm, and the fin thickness of about 1 mm. 



Both of the above alloys have certain problems. 1060 aluminum alloy hot-rolled plate is an alloy that cannot be strengthened by heat treatment, and its material hardness is low. Although it is difficult to skiving fin, the subsequent processing cost is high. For example, when milling the bottom plate, the problem of sticking and cutting is easy to occur. After drilling and tapping, the fin hole is easy to slip and the screw tap is broken, which causes the work piece to be scrapped. In order to improve this problem, it is necessary to reduce the machining speed of the work piece and increase a large number of threaded hole reducing nuts, which leads to high machining cost. However, 6063 aluminum alloy extruded plate has higher hardness, the highest fin relieving height is much lower than that of 1060 hot-rolled plate, and there is natural age hardening phenomenon.


The copper is the material that can make skiving fin more narrow and more thinner fin pitch, its skiving ability is higher level than the aluminum skived fin, which is more flexible and pretty in appearance all the type in around. The cooling power is also the best usage in the liquid CPU heat sink cooler, so is not replaceable in the field of modern radiator field.



What is the benefit of skiving heat sink?


The working principle of skiving heat sink is done with the material feature and it’s different shape on it, the skiving technology has the more flexibility on size, shape and fin pitch depends on customer different kinds of requirement, the skived heat sink can have the ability of making more dense, more large sizes so that increase the cooling power.

The skiving heat sink needs to be done with the help of abundant experience of engineers who can make programming and know how to adjust the fin shape and working calculation during operation.


The every data inputs in the machines can greatly influence the final result if the programming is right or not, the needs to make the skiving height, fin pitch and thickness, all needs to take into consideration for the better performance. Especially the copper skived heat sink with high dense fins, needs really patient in adjusting program me and repeatedly programming once the position of skiving is not correct, every process is not that same and needs time to readjust it for several times.


The application of skiving heat sink


The skiving heat sink is widely using in the field of water cold plate during the process of friction welding stir, the skiving heat sink mostly been appeared in the field of electronic products and power supply and even including the variety of Led products, for example the high dense copper skiving heat sink used in the CPU liquid cooler with friction welding stir, the heat pipes heat sink with the skiving heat sink for better cooling power increased. The skiving heat sink used in the automobile central controller for heat cooling, any the application that you might unknown and uncertain.