punching and shearing steel plate 2

[goffy]

i have to write a lecture about punching and shearing steel plate. it is to be presented to a class of second year students and must explain shearing and punching steel plate.
i need info about punch and blade clearences, and sketches of how the shearing and puching action takes place.
also some formulas for working out the pressures required for these operations

 

[NickE]

Is this for school?

 

[TVP]

Have you visited a library recently and reviewed any of the references available on the subject? ASM Handbook Volume 14, SME Tool & Manufacturing Engineers Handbook Volume 2, Handbook of Metal Forming edited by Lange, and Metal Forming Handbook published by Schuler are all excellent references.

 

[limct]

cutting force, C = LTS tons
where,
L=length of cutting edge. in.
T=thikness of stock material. in.
S=shear strength of stock material, tons

Stripping force is generally 5~20 % of cutting force

cutting clearance for most metal is 3~5%. for stainless steel, it's 5~8%

I recommend you this book.
Basic Diemaking
by D.Eugene Ostergaard
McGraw-Hill Book Company


Best regards,
ct