Bend allowance problem

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Bend allowance problem

Рет қаралды 36,383

Kevin Ink Fx

Күн бұрын

Пікірлер: 27

@cornpop7805 2 жыл бұрын

Is there a book that you are working from that discusses this in greater detail. So far, this is the best explanation I've seen on this subject and I have searched the internet far and wide. No one else goes through it step by step like you do. Big thanks!

@jacobpereira7045 6 ай бұрын

Dude, love the mentioning on the aluminum shrinking. It’s not often I see that mentioned on the internet.

@andrewhamm6498 Жыл бұрын

Thanks for sharing this my friend! I learned more in these couple minutes then I did in three hours taking notes and reading

@chestertonhawks9823 2 жыл бұрын

Nice breakdown in actual practice. Thanks man!

@tonyw.9132 3 жыл бұрын

Very good. One way to simplify is circumference divided by 360 times the bend angle in degrees.

@dart70ca 3 жыл бұрын

Circumference of what?

@rexnemo Жыл бұрын

@@dart70ca Circumference of the circle on the neutral axis . So a 90 degree bend would be a quarter of the circumference of the circle , as 90 / 360 = 0.25 . I hope this clarifies it for you .

@antonijose8686 3 жыл бұрын

This was of great help... thanks .. keep it up ...

@technicalstudies. 2 жыл бұрын

Nice video and explanation.

@twistedtrail8414 6 ай бұрын

So you don't have to factor in bend deduction? Edit* I see now ...you are figuring from the neutral axis where no stretch occurs.

@ahmedekin 3 жыл бұрын

Thank you.

@mjtunstall1976 2 жыл бұрын

where does 3/8 on the radius come from?

@chestertonhawks9823 2 жыл бұрын

Its hard to put in words but easy for .5 k factor. So I’m going to go into depth, and I hope it helps someone. This is the best video I’ve found. When he says radius, he means radius plus k factor. K factor is almost always .4 to .5 for steel and aluminum. So he just took half of his material thickness being.( .5 = K factor). He then added that to the bend radius to get his “R” it’s really this!!!!!……….. material thickness x the K factor x 2 x pi x the angle of bend divided by 360 ……… that’s the equation if not an easy .5 k factor. (K factor changes on the type of metal you are bending) there are easy google charts if you know what you are bending. There are also calculators but learn this first!

@winterhome6449 4 ай бұрын

could you make a video on complex sheet metal design development length calculation ?? Thank you

@CONSTRUCTIONOMETRY-hj7jt Жыл бұрын

Good job!

@Mr123bears 2 жыл бұрын

Great video!

@yeagermcbipper9008 3 жыл бұрын

K factor, yo. This math is BS classroom work

@rexnemo Жыл бұрын

I think that the figures calculated are with a neutral axis in the centre of the material so that the stretch and shrinkage are equal in this case . To make a more realistic bend allowance formula requires the formula BA= AxPi/180 x( R + KT ) Where BA = Bend Allowance A = angle of bend in degrees R = Internal radius of bend ( found from bending tool ) K = K Factor , which is found empirically ( By trial and error ) Or from Westinghouse tables T = Material thickness . So I think that this is a start to find the allowances but will be inaccurate as the K factor varies .

@rocknrollolivierrr 3 жыл бұрын

I'm wondering. According to the result length versus the total of the panels length, wouldn't it be easier to subtract 2x thickness for a 90 degrees bend and 1x the thickness for a 45 degrees bend?

@kevininkfx5212 3 жыл бұрын

That works well for 90 deg bends but not as well for other angles.

@chestertonhawks9823 2 жыл бұрын

Yeah that doesn’t work if you have quality control and tolerances. You need to actually do the math.