Low Height Ultra-thin Fin on A5083 Aluminum Plate Fabricated by Friction-stir Forming
Low Height Ultra-thin Fin on A5083 Aluminum Plate Fabricated by Friction-stir Forming
复制标题
A5083铝板上搅拌摩擦成型低高度超薄翅片
DOI：
10.1016/j.proeng.2017.01.150
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
T. Nishihara
中科院分区：
文献类型：
--
作者：
T. Ohashi;Hamed Mofidi Tabatabei;T. Nishihara
近来对电子设备的小型化的需求已经引起了板空间的限制，并且热管理变得越来越困难。采用散热器的热管理通常受到产品设计的空间限制的影响。具有薄翅片的较低轮廓的被动散热器是这些空间限制的必要解决方案之一。大多数这样的产品已经通过常规或背压施加锻造产生。然而，其鳍片的薄度是有限的，尽管更高密度的鳍片更有效。本文介绍了一种新的成形技术，搅拌摩擦成形（FSF），以产生低剖面，超薄翅片。建议的过程如下。将料盘置于模具上，对料盘背面进行摩擦搅拌。由于摩擦搅拌引起的高压和热量，材料变形并精确填充模具的窄槽。本研究探讨成形条件与结果，包括鳍片的高度限制。因此，我们成功地在3 mm厚的JIS A5083 P-O铝板上生产了厚度为0.5mm及以下的低轮廓超薄翅片。
Recent demands on miniaturization of an electronic apparatus have caused board-space constraints, and thermal management is getting increasingly difficult. Thermal management employing heat sinks is often compromised by the space constraints for a product design. Lower profile passive heat sinks having thin fins are among necessary solutions to these space limitations. Most such products have been generated by conventional or back pressure applied forging. However, thinness of its fin is limited, though a higher density of fins is more effective. This paper describes a new forming technology, friction-stir forming (FSF), to generate a low profile, ultra-thin fin. The suggested process is as follows. The authors put a material plate on a die and conducted friction stirring on its back surface. The material deformed and precisely filled narrow grooves of the die due to high pressure and heat caused by friction stirring. This study investigates the forming conditions and the corresponding results including the height limit of the fin. Consequently, we successfully generated low-profile, ultra-thin fins with 0.5mm thickness and less on 3mm-thick JIS A5083P-O aluminum plate.