A cylindrical part has a diameter – 2.5 in and a height = 4 in it...
A cylindrical part has a diameter – 2.5 in and a height = 4 in it is upset forged to a height 2.75 in a coefficient of friction at the die work interface = .10 the work material has a flow curve with strength coefficient= 25000 lb/in and strain hardening exponent = .22 compute the forging force F at the following values of part height
a) h = 4.0 in ?
b)h=2.75 in ?
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A cylindrical part has a diameter – 2.5 in and a height = 4 in
it...
(15 pts) 6. A cylindrical part is forged in an open die. The starting diameter =...
(15 pts) 6. A cylindrical part is forged in an open die. The starting diameter = 50 mm and height = 40 mm. Height after forging = 30 mm. Coefficient of friction at the die-work interface = 0.20. Yield strength of the low-carbon steel work material = 105 MPa; its strength coefficient = 500 MPa and strain hardening exponent = 0.25. Determine (a) the romarse force for the viviu point is reacha ... tegenkor Lici........ .he longer tha n (a)...
(2 marks) Calculate the forging force at the end of the stroke for a solid cylindrical...
(2 marks) Calculate the forging force at the end of the stroke for a solid cylindrical workpiece made of annealed 70-30 brass that is 150 mm high and 100 mm in diameter and is to be reduced in height by 25%. Coefficient of friction is estimated to be 0.2, its flow curve is defined by a strength coefficient of 600 MPa, and a strain-hardening exponent of 0.12. Assume that a strain = 0.002. (6 marks) Wire Drawing (a). In wire...
5. A spool of Cu wire has a starting diam. Of 2.5 mm. It is drawn...
5. A spool of Cu wire has a starting diam. Of 2.5 mm. It is drawn through a die with an opening of 2.1 mm. Coefficient of friction at the work-die interface is 0.08. The pure Cu has a strength coefficient of 300 MPa & a strain hardening exponent of 0.5. The operation is done at room temperature. Determine: (A) area reduction, (B) draw stress & C) draw force required for the operation. Assume die angle to be 100.
zis 3. A Cylindrical billet is 75 mm long and 35 mm in diameter. It is...
zis 3. A Cylindrical billet is 75 mm long and 35 mm in diameter. It is reduced by direct extrusion to 20 mm diameter. The half die angle x 45°. In the flow curve for the work metal, strength coefficient 500 MPa and strain-hardening exponent -0.25, Coefficient of friction at the work- die interface 0.15. Given that total extrusion pressure P, is the sum of the die pressure P and the friction pressure P, between the container and the extruded...
A 2.00” diameter billet will be reduced in diameter to 1.00” using direct extrusion as shown...
A 2.00” diameter billet will be reduced in diameter to 1.00”
using direct extrusion as shown below. The strength coefficient and
strain hardening exponent of the material are K = 60,000 lb/in2 and
n = 0.18. The coefficients for Johnson’s strain formula are a = 0.8
and b = 1.5. The ram force available on the extrusion press is 1.75
X 10^6 lb. Calculate the maximum length (Lmax) of billet that can
be extruded.
Container Ram Final work shape F...
A cylindrical work-piece is subjected to a cold upset forging operation. The starting piece is 75...
A cylindrical work-piece is subjected to a cold upset forging operation. The starting piece is 75 mm in height and 50 mm in diameter. It is reduced in the operation to a final height of 36 mm. The work material has a flow curve defined by K = 350 MPa and n = 0.17. Assume a coefficient of friction of 0.1. Determine the forging force at (a) the intermediate height of 62 mm, (b) the intermediate height of 49 mm,...
A final height of 24.4 A 88.9 mm diameter by 133.35 mm height AZ31B billet is forged t mm at a co...
a final height of 24.4 A 88.9 mm diameter by 133.35 mm height AZ31B billet is forged t mm at a constant strain rate of 0.01 s1 at temperatures between 250 °C - 400 °C The stress strain characteristics of AZ31 material at these different temperatures at the strain rate 0.01 s, are given in Figure below. a) Estimate the force required for forging at two temperatures 250 °C- 400 °C under conditions of: sliding fraction with μ-0.2 and sticking...
A rod is drawn from a diameter of 43.0 mm to a diameter of 21.1 mm...
A rod is drawn from a diameter of 43.0 mm to a diameter of 21.1 mm in a draw die of 19.2°. The coefficient of friction is 0.120. Take the strength coefficient (K) as 321 MPa and the strain- hardening exponent as 0.258. a) Expected answer: 14238541504 Determine the true strain. b) Expected answer: 280 MPa Determine the average flow stress (of) c) Determine the ideal drawing force when friction is negligible. Use the ideal, no friction drawing stress formula....
QUESTION 2 The height of a 50-mm Cylindrical part with 20 mm OD is reduced to...
QUESTION 2 The height of a 50-mm Cylindrical part with 20 mm OD is reduced to 25 mm in an open die forging operation Calculate the forging force if the flow stress of the material is 300 MPa. Assume homogeneous deformation conditions is 1). (careful with the units!) 1) The final area of the part is x104m2 (round to two decimal places) 2) The forging force is KN
Assignment 01 TOT Mechanical Properties of Materials 1. A tensile test specimen has a gage length...
Assignment 01 TOT Mechanical Properties of Materials 1. A tensile test specimen has a gage length = 50 mm and its cross-sectional area = 100 mm. The specimen yields at 48,000 N, and the corresponding gage length - 50.23 mm. This is the 0.2 ent yield point. The maximum load of 87,000 N is reached at a gage length 64.2 mm. Determine (a) yield strength, (b) modulus of elasticity, and (c) tensile strength. (d) If fracture occurs at a gage...
(15 pts) 6. A cylindrical part is forged in an open die. The starting diameter = 50 mm and height = 40 mm. Height after forging = 30 mm. Coefficient of friction at the die-work interface = 0.20. Yield strength of the low-carbon steel work material = 105 MPa; its strength coefficient = 500 MPa and strain hardening exponent = 0.25. Determine (a) the romarse force for the viviu point is reacha ... tegenkor Lici........ .he longer tha n (a)...
(2 marks) Calculate the forging force at the end of the stroke for a solid cylindrical workpiece made of annealed 70-30 brass that is 150 mm high and 100 mm in diameter and is to be reduced in height by 25%. Coefficient of friction is estimated to be 0.2, its flow curve is defined by a strength coefficient of 600 MPa, and a strain-hardening exponent of 0.12. Assume that a strain = 0.002. (6 marks) Wire Drawing (a). In wire...
5. A spool of Cu wire has a starting diam. Of 2.5 mm. It is drawn through a die with an opening of 2.1 mm. Coefficient of friction at the work-die interface is 0.08. The pure Cu has a strength coefficient of 300 MPa & a strain hardening exponent of 0.5. The operation is done at room temperature. Determine: (A) area reduction, (B) draw stress & C) draw force required for the operation. Assume die angle to be 100.
zis 3. A Cylindrical billet is 75 mm long and 35 mm in diameter. It is reduced by direct extrusion to 20 mm diameter. The half die angle x 45°. In the flow curve for the work metal, strength coefficient 500 MPa and strain-hardening exponent -0.25, Coefficient of friction at the work- die interface 0.15. Given that total extrusion pressure P, is the sum of the die pressure P and the friction pressure P, between the container and the extruded...
A 2.00” diameter billet will be reduced in diameter to 1.00”
using direct extrusion as shown below. The strength coefficient and
strain hardening exponent of the material are K = 60,000 lb/in2 and
n = 0.18. The coefficients for Johnson’s strain formula are a = 0.8
and b = 1.5. The ram force available on the extrusion press is 1.75
X 10^6 lb. Calculate the maximum length (Lmax) of billet that can
be extruded.
Container Ram Final work shape F...
a final height of 24.4 A 88.9 mm diameter by 133.35 mm height AZ31B billet is forged t mm at a constant strain rate of 0.01 s1 at temperatures between 250 °C - 400 °C The stress strain characteristics of AZ31 material at these different temperatures at the strain rate 0.01 s, are given in Figure below. a) Estimate the force required for forging at two temperatures 250 °C- 400 °C under conditions of: sliding fraction with μ-0.2 and sticking...
A rod is drawn from a diameter of 43.0 mm to a diameter of 21.1 mm in a draw die of 19.2°. The coefficient of friction is 0.120. Take the strength coefficient (K) as 321 MPa and the strain- hardening exponent as 0.258. a) Expected answer: 14238541504 Determine the true strain. b) Expected answer: 280 MPa Determine the average flow stress (of) c) Determine the ideal drawing force when friction is negligible. Use the ideal, no friction drawing stress formula....
QUESTION 2 The height of a 50-mm Cylindrical part with 20 mm OD is reduced to 25 mm in an open die forging operation Calculate the forging force if the flow stress of the material is 300 MPa. Assume homogeneous deformation conditions is 1). (careful with the units!) 1) The final area of the part is x104m2 (round to two decimal places) 2) The forging force is KN
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