T6-6061 Aluminum Mockup of overlap joint. Short piece (< 0.5m) resting on foam insulation Gentle grinding: Max Temp < 50 C Aggressing grinding: Max Temp.

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Presentation transcript:

T Aluminum Mockup of overlap joint. Short piece (< 0.5m) resting on foam insulation Gentle grinding: Max Temp < 50 C Aggressing grinding: Max Temp < 90 C ~1 mm thick emery grinding wheel Work done by Bert Gonzales Temperature monitoring: Jorge Montes

Temperature (Celsius) versus time (arbitrary)Monitor 1 Monitor 2 Monitor 3 Aggressive grinding at time ~ 500 Gentle grinding at time ~ 80

Bert Gonzales reported that cutting through the weld was not any harder than cutting through T Al Dremel tool kit also has a fiber-glass reinforced emery grinding wheel. Bert says that this is harder to control. It tends to jump a bit. Emery wheel is recommended.

Type density Thermal Cond. Specific Heat T Al* 2.7g/cc 167 W/(m-C) 1.3e3 J/(kg-C) Pure Al* 2.7g/cc 220 W/(m-C) 896 J/(kg-C) AA 1100** 2.7g/cc 222 W/(m-C) 906 J/(kg-C) * ** wrought_aluminum_alloy_1100&DokuWiki=5fb40349ffd1dc ba1dde42e6b If aggressively grinding the weld: Worse case temperature = (90 C – 24 C)*(1.3e3/900) + 24 C = 119 C If gently grinding the weld: Worse case temperature = (50 C – 24 C)*(1.3e3/900) + 24 C = 62 C