1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergij07 [2.7K]
3 years ago
6

An annealed copper strip of 228 mm wide and 25 mm thick being rolled to a thickness of 20 mm, in one pass. The roll radius is 30

0 mm, and the rolls rotate at 100 rpm. Calculate the roll force and the power required in this operation
Engineering
1 answer:
sdas [7]3 years ago
5 0

Answer:

The roll force is 1.59 MN

The power required in this operation is 644.96 kW

Explanation:

Given;

width of the annealed copper, w = 228 m

thickness of the copper, h₀ = 25 mm

final thickness, hf = 20 mm

roll radius, R = 300 mm

The roll force is given by;

F = LwY_{avg}

where;

w is the width of the annealed copper

Y_{avg} is average true stress of the strip in the roll gap

L is length of arc in contact, and for frictionless situation it is given as;

L = \sqrt{R(h_o-h_f)} \\\\L = \sqrt{300(25-20)}\\\\L = 38.73 \ mm

Now, determine the average true stress, Y_{avg}, for the annealed copper;

The absolute value of the true strain, ε = ln(25/20)

ε = 0.223

from true stress vs true strain graph; at true strain of 0.223, the true stress is 280 MPa.

Then, the average true stress = ¹/₂(280 MPa.) = 180 MPa

Finally determine the roll force;

F = LwY_{avg}

F = (\frac{38.73 }{1000})(\frac{228}{1000})*180 \ MPa\\\\F =   1.59 \ MN

The power required in this operation is given by;

P = \frac{2\pi FLN}{60}\\\\P =  \frac{2\pi (1.59*10^6)(0.03873)(100)}{60}\\\\P = 644955.2 \ W\\\\P = 644.96 \ kW

You might be interested in
What do you think of web 3.0? do you think it will be realized someday in the future?​
Elodia [21]

Answer:

is this a question for hoework

7 0
3 years ago
Nơi nào có điện tích thì xung quanh điện tích đó có :
maksim [4K]

Explanation:

sory sorry sorry sorrysorrysorry

4 0
2 years ago
4. What are these parts commonly called?
patriot [66]

These parts are commonly called carburetor emulsion tubes. These tubes maintain the air-fuel ratio at different speeds.

The carburetor is a device of the combustion engine power supply system that mixes fuel and air in order to facilitate internal combustion.

The carburetor emulsion tubes are tubes that maintain the air-fuel ratio at different velocities.

These tubes (carburetor emulsion tubes) are small brass cylinders where the metering needle slides into them.

Learn more about carburetors here:

brainly.com/question/4237015

7 0
3 years ago
What is the criteria for a guard having to be used on a machine?
evablogger [386]

Answer:

Machine Safeguards must meet these minimum general requirements: Prevent contact: The safeguard must prevent hands, arms, or any other part of a worker's body from making contact with dangerous moving parts. Be secure: Workers should not be able to easily remove or tamper with the safeguard.

8 0
3 years ago
Hareem and Shahad are on a road trip to Florida. They pull over to get gas, and as you may know it is sold by the gallon in the
Alona [7]

Answer:

53.3

Explanation:

4×14=56

56÷1.05=53.3

4 0
3 years ago
Other questions:
  • Consider flow in between two parallel plates located a distance H from each other. Fluid flow is driven by the bottom plate movi
    15·1 answer
  • How is this technique is adapted to coat continuous steel strip for manufacture of tinplate products?
    11·1 answer
  • What is a coarse-grained rock composed of intermediate plagioclase feldspar and pyroxene? a. graniteb. gabbro c. andesited. peri
    9·1 answer
  • A certain working substance receives 100 Btu reversibly as heat at a temperature of 1000℉ from an energy source at 3600°R. Refer
    13·1 answer
  • Ok I need a new laptop but I'm not sure which one. The Surface laptop 3 is better in many fields like the camera, speaker, audio
    14·1 answer
  • Determine the magnitude and the location of the hydrostatic force on the 2m by 4 m vertical rectangular gate shown in Figure P3.
    12·1 answer
  • Write a program to calculate overtime pay of 10 employees. Overtime is paid at the rate of Rs. 12.00
    13·1 answer
  • What is it that makes a battery rechargeable? How is it different from a regular battery?
    14·2 answers
  • You may wonder who the rest goes
    11·1 answer
  • A fully charged new battery will have a low conductance reading.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!