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BR-WS-02
Winshare thermal
BR-WS-02
To keep in mind: Extrusion alloys 6060-6063-6101 are better than 6082 alloy The extruded aluminum is annealed during brazing but it will harden again during cooling and after a few days it will reach approx. 80% of the original strength The pure aluminum 1000 alloys will remain annealed No problem to braze together Aluminum, Titanium and Stainless Steel. Copper base with aluminium fins can be brazed but with special “tricks” Maximum brazing dimension 600 x 1200 mm but better stay within 450 x 800 mm. Height< 250 mm Base Plate Best Practice Any thickness is possible Suggested extruded “U” shape with thick (e.g. 4 mm bottom ÷ 2 mm top) external fins, to protect the “soft” thin internal fins Deformation during brazing is within extrusion tolerances. Leave 0.5 ÷ 1.5 mm of skimming material, according to the base dimensions up to 400 mm CNC machining of brazed plates has no problems Using Stacked Fins, the base must be internally flat Using single fins, the base must have grooves 2.5 mm deep to assemble and hold the fins during brazing Fins Best Practice Any thickness is possible, but for both thermal and mechanical reasons avoid tall and thin fins. Practically if it is optimized for thermal performance it will be ok also for brazing. Pure aluminium is usually the best for thermal conductivity and manufacturing automation. Extruded fins can be brazed, if convenient. Stacked fins, already automatically packed and with the top connected together, are the best solution for medium-high volumes. For long heatsinks (>200 mm) it is easy to mount 2 or more packs half the size or less. Fins can be shorter than the base, if needed and can be of different height or length (but extra cost) Design the base with the external fins suitable to hold the fan without additional machining (slots for screws) Due to high efficiency, the fins must be short and thick The slots in the fins are used only to add turbulence. The air flow exit is only front and back Milled LCP can be freely designed. Take care only of the thickness of covers with wide channels and if high burst pressure is required Blister LCP with internal offset fins are the most efficient and low cost solution for standard applications Avoid mixing aluminium and copper/brass in the same water circuit For mix circuits or with aggressive fluids, we suggest stainless steel tubing LCP.
To keep in mind: Extrusion alloys 6060-6063-6101 are better than 6082 alloy The extruded aluminum is annealed during brazing but it will harden again during cooling and after a few days it will reach approx. 80% of the original strength The pure aluminum 1000 alloys will remain annealed No problem to braze together Aluminum, Titanium and Stainless Steel. Copper base with aluminium fins can be brazed but with special “tricks” Maximum brazing dimension 600 x 1200 mm but better stay within 450 x 800 mm. Height< 250 mm Base Plate Best Practice Any thickness is possible Suggested extruded “U” shape with thick (e.g. 4 mm bottom ÷ 2 mm top) external fins, to protect the “soft” thin internal fins Deformation during brazing is within extrusion tolerances. Leave 0.5 ÷ 1.5 mm of skimming material, according to the base dimensions up to 400 mm CNC machining of brazed plates has no problems Using Stacked Fins, the base must be internally flat Using single fins, the base must have grooves 2.5 mm deep to assemble and hold the fins during brazing Fins Best Practice Any thickness is possible, but for both thermal and mechanical reasons avoid tall and thin fins. Practically if it is optimized for thermal performance it will be ok also for brazing. Pure aluminium is usually the best for thermal conductivity and manufacturing automation. Extruded fins can be brazed, if convenient. Stacked fins, already automatically packed and with the top connected together, are the best solution for medium-high volumes. For long heatsinks (>200 mm) it is easy to mount 2 or more packs half the size or less. Fins can be shorter than the base, if needed and can be of different height or length (but extra cost) Design the base with the external fins suitable to hold the fan without additional machining (slots for screws) Due to high efficiency, the fins must be short and thick The slots in the fins are used only to add turbulence. The air flow exit is only front and back Milled LCP can be freely designed. Take care only of the thickness of covers with wide channels and if high burst pressure is required Blister LCP with internal offset fins are the most efficient and low cost solution for standard applications Avoid mixing aluminium and copper/brass in the same water circuit For mix circuits or with aggressive fluids, we suggest stainless steel tubing LCP.
