Shown in the figure is a gear-driven squeeze roll that mates with an idler roll, below. The roll i designed to exert a normal force of 5.25 N/mm of roll length and a pull of 4.2 N/mm on the material being processed. The roll speed is 300 rev/min, and a design life of 30 000 h is desired Use an application factor of 1.2, and select a pair of angular-contact 02-series ball bearings from Table 11-2 to be mounted at 0 and A. Use the same size bearings at both locations and a com bined reliability of at least 0.92. 100 dia. 20° 45 B. 200 45 70 Gear 4 76 dia.

Shown in the figure is a gear-driven squeeze roll that mates with an idler roll, below. The roll i designed to exert a normal force of 5.25 N/mm of roll length and a pull of 4.2 N/mm on the material being processed. The roll speed is 300 rev/min, and a design life of 30 000 h is desired Use an application factor of 1.2, and select a pair of angular-contact 02-series ball bearings from Table 11-2 to be mounted at 0 and A. Use the same size bearings at both locations and a com bined reliability of at least 0.92. 100 dia. 20° 45 B. 200 45 70 Gear 4 76 dia.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

An aluminium strip with a cross section of 200 mm × 8 mm is being rolled with 25% reduction of area, using 400 mm diameter steel rolls. The tensile yield stress of aluminium is 0.28 kN/mm2. Calculate i) The angle subtended by the deformation zone at the roll center. ii) The minimum coefficient of friction between the workpiece and the rolls for an unaided bite to be possible.
Estimate the roll force, F, and the torque for an AISI 1020 carbon-steel strip that is 200 mmwide, 10 mm thick, and rolled to a thickness of 7 mm. The roll radius is 200 mm, and itrotates at 200 rpm. Note that K = 530 MPa and n = 0.26.
A metal strip is to be rolled from an initial wrought thickness of 3.5 mm to a final rolled thickness of 2.5 mm in a single pass rolling mill having rolls of 250 mm diameter. The strip is 450 mm wide. The average coefficient of friction in the roll gap is 0.08. Taking plane strain low stress of 140 MPa, for the metal and assuming negligible spreading, the roll separating force is.....
Question 3A rolling operation on a 250 mm wide, 8 mm thick, 1112 cold rolled steel takes place using hardened steel rolls with a surface finish of 0.03 μm. The rolls have a diameter of 350 mm and rotates at 115 rpm. The final thickness of the plate is 6 mm and the entry speed of the plate is 1.8m/s Calculate: 3.1)The minimum coefficient of friction required, that will make the rolling operation possible. 3.2 The required roll force. 3.3 The position of the neutral point, ??3.4 Indicate, using a sketch, the neutral point showing all relevant notation and dimensions
Bar stock of initial diameter = 90 mm is drawn with a draft = 15 mm. The draw die has an entrance angle = 18°, and the coefficient of friction at the work‑die interface = 0.08. The metal behaves as a perfectly plastic material with yield stress = 105 MPa. Determine (a) area reduction, (b) draw stress, (c) draw force required for the operation, and (d) power to perform the operation if exit velocity = 1.0 m/min
A single pass rolling process is used with 410 mm diameter steel rollers and a strip of width 140 mm and thickness of 8 mm undergoes 10% reduction of thickness. Calculate the angle of bite in radians?
Estimate the power for annealed low carbon steel strip 200 mm wide and 10 mm thlck, rolled to a thickness of 6 mm The roll radius is 200 mm), and the roll rotates at 200 rev/min; use coefficient 0f friction at the die-work interface (p)= 0.1, Alow carbon steel such as AlSI 1020 has K (strength coefficient) = 530 MPaand n (stram hardening exponent) = 0.26
Two shafts, having axes in the same plate intersecting at an angle of 40°, turn in the same senses at 30 rpm and 100 rpm. Draw a pair of cone to be located on these shafts and turn in pure rolling contact. Diameter of base of smaller cone is 1 in. Calculate the cone angles. CONE ANGLE 1 (driver): CONE ANGLE 2 (driven):
Correct Solution need.. Two parallel shafts, 61 cm apart and having a speed ratio of 3, are connected by cylinders in pure rolling contact. Determine the D1 in cm, when they turn in same directions.
Estimate the power for annealed low carbon steel strip 200 mm wide and 10 mm thick, rolled to a thickness of 6 mm. The roll radius is 200 mm, and the roll rotates at 200 rev/min; use coefficient of friction at the die-work interface (p)=0.1. A low carbon steel such as AISI 1020 has K (strength coefficient) = 530 MPa and n ( strain hardening exponent) =0.26a)1059 kWb)950 kWc)1183 kWd)875 kW
A strip of 120 mm width and 8 mm thickness is rolled between two 30 mm diameter rolls to get a strip of 120 m width and 7.2 mm thickness. The speed of the strip at the exit is 30 m/min. There is no front or back tension. Assuming uniform roll pressure of 200 MPa in the roll bite and 100% mechanical efficiency, what is the minimum total power required to drive the two rolls?
Power is transmitted from the 1st shaft to the 2nd shaft with a Conical Friction coupling at 950 rpm. If the taper angle is alpha 25 degrees and the average diameter is 120 mm, how much power is produced with a pressing force of 5000 N (kW)