ENGM 445 Mid Term Study Set (Homework 5) Question and answers 100% correct

ENGM 445 Mid Term Study Set
(Homework 5)
1. Which of the following is not a product produced on None.
a rolling mill ?
rails
-round bar, threaded rod
-I beam and channels
-thick walled cylinder
-none

2. What is the no-slip point, also known as the It is the the point along
neutral point, in a rolling operation? the contact arc where work
-It is the point on the work piece where the veloc- ity equals roll
velocity of the workpiece equals the input velocity. Dur- ing a rolling
velocity operation, there is a
-It is the point on the work piece where the gradual change in the
velocity of the workpiece equals the output velocity of the work as it
velocity
-It is the the point along the contact arc where work passes
between the oppos-
velocity equals roll velocity. ing rolls. The entering
speed
-It is the the point along the contact arc where work is vo and the
exit speed is
velocity equals the average workpiece reducing the
velocity. force in flat
rolling?
-a) use hot
rolling
-b) reduce
draft in each
pass
-c) use smaller
3. Which of the following are/is help(s) in diameter rolls

1/
13

, ENGM 445 Mid Term Study Set
(Homework 5)
-d) a and b vf. while the surface
-e) all of the above speed of the rolls
remains constant
between these values.
The no-slip point is the
one point along the
contact arc where
work velocity equals roll
veloc- ity.

All of the above. Ways
to re- duce force in flat
rolling in- clude (1) use
hot rolling, (2) reduce
draft in each pass, and
(3) use smaller diameter
rolls (small rolls have
lower arc contact and
lower dmax (max-




2/
13