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26. A 42.o-mm-thick plate made of low carbon steel is to be reduced to 34.0 mm...
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
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 P=2-kN tensile load is applied to a test coupon made from 1.6-mm thick flat steel...
A P=2-kN tensile load is applied to a test coupon made from
1.6-mm thick flat steel plate (E = 220 GPa, v =
0.30). Assuming a=45 mm and b=13 mm,
(a) Determine the resulting change in the 45-mm gage length.
(b) Determine the resulting change in the 13-mm width.
(c) Determine the resulting change in the 1.6-mm thickness.
(d) Determine the resulting change in the cross-sectional
area.
The uniaxial state of stress in given as ________ (MPa)
A P-2-kN tensile...
Low carbon steel having a tensile strength of 300 MPa and a shear strength of 220...
Low carbon steel having a tensile strength of 300 MPa and a shear strength of 220 MPa is cut in a turning operation with a cutting speed of 3.0 m/s. The feed is 0.20 mm/rev and the depth of cut is 3.0 mm. The rake angle of the tool is 5 in the direction of chip flow. The resulting chip ratio is 0.45. Using the orthogonal model as an approximation of turning, determine (a) the shear plane angle, (b) shear...
A face-milling operation is being carried out on a 320-mm-long, 110-mm-wide, 50-mm thick annealed mild- steel...
A face-milling operation is being carried out on a 320-mm-long, 110-mm-wide, 50-mm thick annealed mild- steel block. The cutter follows a path that is centred over the workpiece and is applied on the top surface where it reduces the part thickness into 44mm. It has four teeth and is 150 mm in diameter. Cutting speed = 132 m/min, and chip load = 0.23 mm/tooth. Determine: Maximum metal removal rate during milling metal removal rate = _______________ ( ) Machining time...
An ECM operation is to be used to cut a hole into a plate of aluminum...
An ECM operation is to be used to cut a hole into a plate of aluminum that is 12 mm thick. The hole has a rectangular cross section, 10 mm by 30 mm. The ECM operation will be accomplished at a current = 1200 amps. The specific removal rate for aluminum = 3.44×10-2 mm3-Amp/sec. Determine (a) feed rate, and (b) time required to cut through the plate. In the casting of steel under certain mold conditions, the mold constant in...
Question 1 A turning operation is carried out on aluminum. Based on the specific energy values...
Question 1 A turning operation is carried out on aluminum. Based on the specific energy values in Table 20.2, determine material removal rate and cutting power in the operation under the following sets of cutting conditions: (a) Cutting speed 5.6 m/s, feed 0.25 mm/rev, and depth of cut 2.0 mm; and (b) cutting speed- 1.3 m/s, feed 0.75 mm/rev, and depth 4.0 mm. Question 2 Consider a turning operation performed on steel whose hardness 225 HB at a cutting speed...
A P=2-kN tensile load is applied to a test coupon made from
1.6-mm thick flat steel plate (E = 220 GPa, v =
0.30). Assuming a=45 mm and b=13 mm,
(a) Determine the resulting change in the 45-mm gage length.
(b) Determine the resulting change in the 13-mm width.
(c) Determine the resulting change in the 1.6-mm thickness.
(d) Determine the resulting change in the cross-sectional
area.
The uniaxial state of stress in given as ________ (MPa)
A P-2-kN tensile...
Question 1 A turning operation is carried out on aluminum. Based on the specific energy values in Table 20.2, determine material removal rate and cutting power in the operation under the following sets of cutting conditions: (a) Cutting speed 5.6 m/s, feed 0.25 mm/rev, and depth of cut 2.0 mm; and (b) cutting speed- 1.3 m/s, feed 0.75 mm/rev, and depth 4.0 mm. Question 2 Consider a turning operation performed on steel whose hardness 225 HB at a cutting speed...
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