AVT 206 A&P - The Math Behind the Bends

AVT 206 A&P - The Math Behind the Bends - Non 90 bend formulas

Рет қаралды 54,646

6 жыл бұрын

WARNING - I made a dyslexic error when copying the formula. I left out a 7. The formula SHOULD read BA(deg)=(0.0078MT+0.01743BR)xdeg. This error affects all 5 of the non-90 videos I made. I will have to re-shoot. In the meantime, I will flag the error to make sure no one is harmed! - WARNING
This video is an explanation of the math on the FAA Airframe test. You can learn to bend metal without doing this math - but this video is about doing the math. It is a follow up to my previous video which explains how setback, bend allowance, bend radius, and sight lines work when bending a radiused corner on the brake. This video explains how we must modify the formulas when doing bends that are not 90 degrees. This is delivered classroom style.

Пікірлер: 34

@vegafiedmedia

thank you for these videos. For us that need visual demos, maybe next time create one with a thickness. For example 1/4" thick aluminum with a 90 degree bend.

@TheEpicPancake Жыл бұрын

Supremely helpful. As a (relatively) math savvy person, I've always hated having formulas dropped on me without any explanation of what they're accomplishing. Actually having it explained makes things way easier to grasp for me than referring to arbitrary numbers on charts.

@orrinmoore3858 5 жыл бұрын

Thank you. I always measured my setback from 0° to 90° on a percentage scale, ( 45° is 50% of bend area of a 90°, ect.. ) but it's never worked right once I go acute of 90°.Its always nice to have hard math to figure out what those engineers were thinking 😁 I'm subscribing right now!

@dni3541 6 жыл бұрын

thank you for your explanation. I hope you will post more FAA Airframe test explanation

@TheJigabooWarrior 6 жыл бұрын

Awesome video! I have been doing a lot of sheet metal bending and riveting lately, both at work and to prepare for my Oral & Practical airframe test, and you did an excellent job of explaining bend radii.

@daniyalkhansuri2857 3 жыл бұрын

Great job

@anniej4004 5 жыл бұрын

This is very helpful

@vaibhavsangoli4577 4 жыл бұрын

Hello,

@ruleoflaw2034 4 жыл бұрын

hello sir, i saw all your videos related to this topic and every time i found a huge difference in calculation between my essay and yours.

@mohamedelsayed-qx2co 4 жыл бұрын

nowadays we upgrade tube bender machine and we stop to calculate cut to length of pipe (arcs lengths + straight length ) but we try to calculate arc length times from inner ,outer and mean diameter after all calculations we didn't reach to accurate length .

@NOOne-im5vg 5 жыл бұрын

I used this formula in the late 80's when bending 3 and 4 inch NB pipework.

@leosmi1 5 жыл бұрын

I need a k-factor table for 6mm wire

@paulmanhart4481 Жыл бұрын

Arc length S equals radius R times angle theta.

@jenpsakiscousin4589

Where to set the back gauge is the tricky part

@felixvincent643 4 жыл бұрын

Around

@itsyours5353 4 жыл бұрын

How can you say k as 1/2 sir..

@musicmore196 6 жыл бұрын

Thank you for your explanation. And I have a question, what can be the maximum bend angle of a steel plate for bending without cracks with supposed MT=2, BR =2, elongation limit = 20%?