Timeline for Aluminum tube expansion (flaring)
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
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| Sep 24, 2018 at 20:53 | comment | added | Biswajit Banerjee | In that case I'd recommend doing simulations. 6061-T6 is well characterized and you'll be able to find data quite easily. Tensile splits are caused by tiny imperfections in the shape and small variations in material properties. These cannot be avoided if you're working close to the limiting strength of the material. The solution is to work well below that strength, use a slow process (for low strain rates), and make sure that the tube extrusion process does not introduce too much texture in the tubes. | |
| Sep 24, 2018 at 13:13 | comment | added | Jimmy V | Added to the previous, the customer and the customer's customer will consider the entire lot of material non-conforming if only one sample is found to have a split. We may send thousands of feet of tube, but just one 2" sample split can cause major headaches and returns as they don't deal with a ppm, but a zero-defect policy. | |
| Sep 24, 2018 at 12:55 | comment | added | Jimmy V | Thanks Biswajit, I will definitely look up the references you've posted. In my business, we haven't had the extrusion die built before receiving the quote, as dies are $1,000s of dollars, for a part we may not get. So, a challenge we face is that we can't do testing in house prior to needing to decide whether or not to take the business on. This particular customer was one of the first in the US to switch from steel to aluminum. Its been a struggle convincing folks of the limits of this alloy and temper. | |
| Sep 22, 2018 at 21:55 | history | answered | Biswajit Banerjee | CC BY-SA 4.0 |