Abstract
Grooved tubes are widely used in electronic cooling modules. They are usuallt drawn, a term referring to molding. However, this process has limitations, especially in the production of smaller tubes. Therefore, this study examines the potential of an alternative process, dieless forming, in which the grooves on stainless steel are generated by pulsed laser-assisted air pressure. To begin with, the stainless steel tube in ambient air was heated using a pulsed laser. Then, groove samples were sliced for observation using an optical microscope (OM). Finally, the samples were analyzed using Scanning Electronic Microscope (SEM). The results demonstrate that grooves can be formed utilizing dieless forming with pulsed laser-assisted air pressure. The average observed depth of the grooves 208.5 um at 10-watt power and 0.01 Mpa gas pressure. In conclusion, grooves at a micro scale can be produced effectively by dieless forming for a range of industrial applications.
Highlights
Moore’s Law [1] holds that, all electronic devices become smaller and smaller over time. This trend extends to consumer electronics, whose requirements for tiny components are constantly increasing
The diameter of micro heat pipes can affect the efficiency of heat dissipation, because increasing surface area reduces air-flow resistance and elevates thermal conductivity
This process has the limitation that, once the tube is reduced, the geometric section of its inner groove will deform. [5], [6] The present research attempts to solve this problem by forming inner-grooved tubes via dieless forming instead of roll forming
Summary
Moore’s Law [1] holds that, all electronic devices become smaller and smaller over time. Rapid development of both the software and hardware components of smartphones, for instance, implies that there will be increasing demand for advanced heatdissipation solutions In recent years, such solutions have included micro heat pipes. [4] After the tube has been formed, its size will be reduced using multiple rollers rotating in a cycle around the tube while it is drawn in the axial direction. This process has the limitation that, once the tube is reduced, the geometric section of its inner groove will deform. This process has the limitation that, once the tube is reduced, the geometric section of its inner groove will deform. [5], [6] The present research attempts to solve this problem by forming inner-grooved tubes via dieless forming instead of roll forming
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