Derive the Friction Hill equation for open die forging of a cylindrical workpiece

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An open forging die used to forge a cylindrical part with the initial diameter is 45...

An open forging die used to forge a cylindrical part with the initial diameter is 45 mm and the initial height is 40 mm. The coefficient of friction at the die-work interface is 0.20. The height after forging is 25 mm. The yield strength of the work material is 285 MPa, and its flow curve is defined by a strength coefficient of 600 MPa and a strain-hardening exponent of 0.12. Determine the force in the operation (a) just as the...

A cylindrical piece is shaped by a cold open die forging. The initial length is 70...

A cylindrical piece is shaped by a cold open die forging. The initial length is 70 mm, and the diameter is 50 mm. The piece length will be 40 mm at the end of the operation. Draw the part length-forging force graph by calculating the forging forces at the start time and at different length values of the part (h = 60 mm, 50. mm, 45 mm). K 345 MPa, n 0.17, p 0.1

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Calculate the forging force for a solid, cylindrical workpiece made of annealed 1020 steel that is 3.5 in. high and 5 in. in diameter and is to be reduced in height by 30%. Let the coefficient of friction be 0.15 and ignore the effects of barreling.

Hot forging is used to reduce a metallic cylindrical workpiece with a diameter of 12 cm...

Hot forging is used to reduce a metallic cylindrical workpiece with a diameter of 12 cm and height of 24 cm to a height of 15 cm. The coefficient of friction of the open die plate with the workpiece is 0.18 and the process takes 4 seconds to complete and at a constant speed. The strength coefficient of the workpiece C= 180 MPa and strain rate sensitivity exponent m = 0.25. calculate the following: The forging shape factor at the...

Determine the temperature rise in the specimen for each case in Problem 6.75 (Open-die forging of...

Determine the temperature rise in the specimen for each case in Problem 6.75 (Open-die forging of a cylindrical, annealed copper specimen 10 mm high and 25 mm in diameter, up to a reduction of 50%, for the cases of (a) no friction between the flat dies and the specimen, (b) ? = 0.10, and (c) ? = 0.30. Ignore barreling.), assuming that the process is adiabatic and the temperature is uniform throughout the specimen. Given: K=315 MPa; n=0.54 from table...

Determine the force vs reduction in height curve in open-dye forging of a cylindrical, annealed copper...

Determine the force vs reduction in height curve in open-dye forging of a cylindrical, annealed copper specifmen 10mm high and 25mm in diameter, up to a reduction of 50% for the following cases: a) no friction between the flat dies and the specimen b) u=0.10 c) u=0.30 Ignore barreling and use average pressure formulas. Then, calculate the work done and the temperature rise in the specimen for each case, assuming the process is adiabatic and and the temperature is uniform...

a) DERIVE the equation for the change in the free energy of a CYLINDRICAL nucleus heterogeneously...

a) DERIVE the equation for the change in the free energy of a CYLINDRICAL nucleus heterogeneously forming from an existing phase. The nucleus grows with its circular base on the mold wall and the axis of the cylinder normal to the wall. ASSUME that the height of the cylinder can be written as h = a * r, where a is a constant, and r is the cylinder radius. b) Find the critical radius and the energy barrier to nucleation...

What is barling effect in open die forging in operation How can it minimized Short clear...

What is barling effect in open die forging in operation How can it minimized Short clear answer be neat

Derive laplaces equation in: a) cartesian3-D b) cylindrical c) spherical polar please be as detailed as...

Derive laplaces equation in: a) cartesian3-D b) cylindrical c) spherical polar please be as detailed as can be with derivations and explanations, please and thank you.

The Hill equation is used to describe cooperativity: a) Write down the Hill Equation for mutant...

The Hill equation is used to describe cooperativity: a) Write down the Hill Equation for mutant hemoglobin protein that has a Hill coefficient of 2. b) If the P50 of this Hb is 30 torr then what is the fractional binding at 20 torr of O2? c)Draw a Hill plot for this protein

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