does anybody have an idea where the K-factor could be set to when bending plastic?
I did some .06 and .12 polycarbonate a few years ago. The size mattered on the .06 so I test bent it to determine the actual bend deduction. On the .12 it didn't matter as it was just a form to stiffen some edges.
You should expect a lot of springback! A 90 degree bend is likely to deform or unbend a good 30 degrees by the next morning, it did for me!
your right that is the proper way to go about finding the numbers. I have lots time in working with plastics, lets say old school toolmaker and heavy on the "old". Just new to SW and using software to figure things out. I'm trying to build a stamping tool that the part is formed later. Hoped for a lazy way out and have the software tell me the blank size, worked great in metal. Thanks again
K factor can vary greatly with plastics, as there are alot of factors that can come into play.
The type of benders that are used. i.e is the material being heated on both sides or just one. is the heat hotter on top or bottom. are you bending towards the heated side or away from the heated side. how big is the area being heated, and how does this relate to the radius being bent. How thick is the plastic. what type of plastic. are you cold bending or heat bending.....Plastics also carry a grain, and expand and contract differently. i.e extruded vs cast
k factor for pmma 3mm and 4.5mm is approx 0.18 for 90 degrees
good luck, but best to make a table through testing and then put those details into a table for each material
Retrieving data ...