{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# H6 - to be zero springback based on these equations Find a...

This preview shows page 1. Sign up to view the full content.

Massachusetts Institute of Technology 2.008: Design and Manufacturing II Problem Set 6 Problem 6-1. Forming (a) Name some process parameters of a metal forming operation. (b) Recall the equation on page 11 of the forging notes for F z : F z = ( πR 2 )(1 / 2) h 2 2 µR 2 µR 1 Y e h µR h What does the Y represent in this equation? What is the only process parameter that you can really change in this equation? Lets consider an even more back-of-the-envelope version of this. (c) Note that for 0 < x 1 . 75, e x 1 + x + x 2 . Convince me of this. (d) Assume that 2 µR 1 . 75. Simplify the expression for F z for this range. Within this range, h what are the only two parameters left? Is this a realistic range for µ, R, h ? Problem 6-2. Springback (a) Recall the equation for springback given on page 22 of the lecture notes. R i = 4 R i Y 3 3 R i Y + 1 R f t E t E In this problem, we will explore whether it is possible
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: to be zero springback based on these equations. Find a solution to the equation 4 x 3 − 3 x = 0. (c) Look up a few diﬀerent values for Y/E for some exotic materials of your choosing (for example, balsa wood). Now for reasonable values of t (think about where you would be using these exotic materials), and using your solution from part (b), plot the R i for which bending to this radius would produce no springback. Are these values realistic? (d) Explain what happens when you increase the thickness of the wire that you are bending by say, 10 percent. 1...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern