A 300 mm wide and 10.6 mm thick steel strip is fed through a rolling mill....
A 300 mm wide and 10.6 mm thick steel strip is fed through a rolling mill. The roller radius is 162 mm and the output thickness is 7.4 mm at a roll speed of 34 RPM. For the steel material K= 125 Mpa, and n=0.12. calculate the roll force and the required roll motor power in KWatts
Homework Answers
I derived the formula
for length of deformation Zone in answer from figure ,observe
carefully
Add Answer to:
A 300 mm wide and 10.6 mm thick steel strip is fed through a
rolling mill....
Q.6 Rolling A 28+Y mm thick, 275+X mm wide metal strip is fed through a two – high rolling mill; each roll has a radius of 240+Z mm having a rotational speed of 48+Z rpm. The strip thickness is to be...
Q.6 Rolling A 28+Y mm thick, 275+X mm wide metal strip is fed through a two – high rolling mill; each roll has a radius of 240+Z mm having a rotational speed of 48+Z rpm. The strip thickness is to be reduced to 24+Y mm in one pass. The strength coefficient of the work material is 270 MPa and strain-hardening exponent is 0.12. Determine: a- The minimum coefficient of friction between the strip and roll surface μ (Use dmax =...
A strip 300 mm wide and 25 mm thick is rolled to a final thickness of...
A strip 300 mm wide and 25 mm thick is rolled to a final thickness of 21 mm with ∅500 mm rolls running at 60 RPM. K = 275 MPa and n=0.2. Using two passes of draft = 2 mm (i.e. t1=23 mm and t2=21 mm) , the class found that the rolling forces were 936 and 1220 kN respectively, and that the power requirement was 171 kW (based on the 2nd pass). It is hypothesized that since the flow...
Estimate the roll force and the power requirements for AISI 1020 annealed carbon-steel strip that is...
Estimate the roll force and the power requirements for AISI 1020 annealed carbon-steel strip that is 250 mm wide and 8 mm thick and rolled to a thickness of 6 mm. The roll radius is 250 mm, and it rotates at 200 rpm.
Q3. ( 25 points) A rolling mill used to reduce a sheet strip by 3 mm...
Q3. ( 25 points) A rolling mill used to reduce a sheet strip by 3 mm in thickness. The sheet has 2.5 cm thickness and 30 cm in width. The rolling speed is 0.83 rev/sec. The sheet material flow stress is given by a = 275€0.15. A compression test was conducted to find the coefficient of friction and revealed that the coefficient of friction is 0.12. Check if the friction is adequate for the rolling operation. If it is calculate...
Estimate the roll force, F, and the torque for an AISI 1020 carbon-steel strip that is...
Estimate the roll force, F, and the torque for an AISI 1020 carbon-steel strip that is f 7 mm. The roll radius is 200 mm wide, 10 mm thick, and rolled to a thick 200 mm, and it rotates at 200 rpm. s o
26. A 42.o-mm-thick plate made of low carbon steel is to be reduced to 34.0 mm...
26. A 42.o-mm-thick plate made of low carbon steel is to be reduced to 34.0 mm in one pass in a rolling operation. As the thickness is reduced, the plate widens by 4%. The yield strength of the steel plate is 174 MPa and the tensile strength is 290 MPa. The entrance speed of the plate is 15.0 m/min. The roll radius is 325 mm and the rotational speed is 49.0 rev/min. Determine the minimum required coefficient of friction that...
(32 POINTS) IV. A n ann ealed copper strip 12 inches wide and 2 inches thick,...
(32 POINTS) IV. A n ann ealed copper strip 12 inches wide and 2 inches thick, is rolled to its maximum in one pass. The following properties of annealed copper are given: strength coefficient is 80,000 psi; true strain at the onset of non-uniform deformation is 0.5; an engineering strain at yield is 0.12. The coefficient of friction between strip and rollis 0.25. The roll radius is 16 inches and the rolls rotate at 150 rpm Calculate the roll-strip contact...
An annealed copper strip (same material as in V) 9 inches wide and 1.5 inch thick was reduced to the maximum extent possible in a single pass of flat rolling. During this reduction, the coefficie...
An annealed copper strip (same material as in V) 9 inches wide and 1.5 inch thick was reduced to the maximum extent possible in a single pass of flat rolling. During this reduction, the coefficient of friction was maintained at 0.25 and the center-center distance between the rolls was 15.5 inches. Calculate the length of contact between roll and strip. Calculate the true strain in the roll gap. Calculate the true stress at this value for the above material. Use...
A plate 125 mm wide, 250 mm long and 14 mm thick is loaded in tension...
A plate 125 mm wide, 250 mm long and 14 mm thick is loaded in tension in the direction of the length. The plate contains a crack as shown in Figure 5-26 (textbook) with a crack length of 25 mm. The material is steel with Kic - 30 MPa.mQS and Sy- 950 Mpa. Determine the maximum possible load that can be applied before the plate has uncontrollable crack growth. a. 201 357 6.417 d. 124 .229
3.2 A steel tension bar 8-mm thick and 50-mm wide with an initial single- edge crack...
3.2 A steel tension bar 8-mm thick and 50-mm wide with an initial single- edge crack of 10-mm long is subjected to an uniaxial stress o = 140 MPa. a) Determine the stress intensity factor K). Is the crack stable? b) Determine the critical crack size, and c) determine the critical load. Data: Kic = 60 MPaym. [Solution: a) 34 MPa, b) 31.1 mm, and c) 98.84 kN).
Q3. ( 25 points) A rolling mill used to reduce a sheet strip by 3 mm in thickness. The sheet has 2.5 cm thickness and 30 cm in width. The rolling speed is 0.83 rev/sec. The sheet material flow stress is given by a = 275€0.15. A compression test was conducted to find the coefficient of friction and revealed that the coefficient of friction is 0.12. Check if the friction is adequate for the rolling operation. If it is calculate...
Estimate the roll force, F, and the torque for an AISI 1020 carbon-steel strip that is f 7 mm. The roll radius is 200 mm wide, 10 mm thick, and rolled to a thick 200 mm, and it rotates at 200 rpm. s o
26. A 42.o-mm-thick plate made of low carbon steel is to be reduced to 34.0 mm in one pass in a rolling operation. As the thickness is reduced, the plate widens by 4%. The yield strength of the steel plate is 174 MPa and the tensile strength is 290 MPa. The entrance speed of the plate is 15.0 m/min. The roll radius is 325 mm and the rotational speed is 49.0 rev/min. Determine the minimum required coefficient of friction that...
(32 POINTS) IV. A n ann ealed copper strip 12 inches wide and 2 inches thick, is rolled to its maximum in one pass. The following properties of annealed copper are given: strength coefficient is 80,000 psi; true strain at the onset of non-uniform deformation is 0.5; an engineering strain at yield is 0.12. The coefficient of friction between strip and rollis 0.25. The roll radius is 16 inches and the rolls rotate at 150 rpm Calculate the roll-strip contact...
An annealed copper strip (same material as in V) 9 inches wide and 1.5 inch thick was reduced to the maximum extent possible in a single pass of flat rolling. During this reduction, the coefficient of friction was maintained at 0.25 and the center-center distance between the rolls was 15.5 inches. Calculate the length of contact between roll and strip. Calculate the true strain in the roll gap. Calculate the true stress at this value for the above material. Use...
A plate 125 mm wide, 250 mm long and 14 mm thick is loaded in tension in the direction of the length. The plate contains a crack as shown in Figure 5-26 (textbook) with a crack length of 25 mm. The material is steel with Kic - 30 MPa.mQS and Sy- 950 Mpa. Determine the maximum possible load that can be applied before the plate has uncontrollable crack growth. a. 201 357 6.417 d. 124 .229
3.2 A steel tension bar 8-mm thick and 50-mm wide with an initial single- edge crack of 10-mm long is subjected to an uniaxial stress o = 140 MPa. a) Determine the stress intensity factor K). Is the crack stable? b) Determine the critical crack size, and c) determine the critical load. Data: Kic = 60 MPaym. [Solution: a) 34 MPa, b) 31.1 mm, and c) 98.84 kN).
Most questions answered within 3 hours.
-
Annual salaries for employees in a large company are
approximately normally distributed with a mean of...
asked 9 minutes ago -
1. Lifetimes of a certain brand of lightbulbs is known to follow
a right-skewed distribution with...
asked 8 minutes ago -
The gravitational field
F(x,y,z) =cx /(x2 + y2 + z2)3/2 e1+ cy /(x2 + y2 +...
asked 7 minutes ago -
Below is an abstract from the following paper published in
Frontiers in Cell and Developmental Biology....
asked 9 minutes ago -
Company A is assigned $200,000 of goodwill arising from a recent
business combination. The current carrying...
asked 16 minutes ago -
Write any individual Class A IP address below. It cannot be
non-routable address. Include the subnet...
asked 17 minutes ago -
Coronado Industries had January 1 inventory of $301000 when it
adopted dollar-value LIFO. During the year,...
asked 26 minutes ago -
The cable supporting a 2145-kg elevator has a maximum strength
of 2.18×104 N.
a) What maximum...
asked 36 minutes ago -
Find the critical value(s) and rejection region(s) for a
two-tailed chi-square test with a sample size...
asked 40 minutes ago -
One of your experts gave me an answer of $7.36 but there are
many different answers...
asked 46 minutes ago -
Petrus Framing's cost formula for its supplies cost is $1,790
per month plus $10 per frame....
asked 59 minutes ago -
Introduction
Information design is a field that studies the way information
should be displayed, which is...
asked 56 minutes ago