Turning tests have resulted in 5-min tool life at cutting speed=160 m/min and a 41-min tool...
Turning tests have resulted in 5-min tool life at cutting speed=160 m/min and a 41-min tool life at speed=100 m/min. a) If you want the tool life to be at least 20 mins. What is the maximum cutting speed you can use? b) The outside diameter of a cylinder made of titanium alloy is to be turned. The starting diameter is 200 mm and the length is 800 mm. The feed is 0.2 mm/rev and the depth of cut is 2 mm. Compute the cutting speed that will allow the tool life to be 10% longer than the machining time for this part.
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Turning tests have resulted in 5-min tool life at cutting
speed=160 m/min and a 41-min tool...
a) A workpiece (φ-75 mm, 1 275 mm) is machined using turning at a feed rate of 0.25 mm/rev. At a cutting speed- 3.5 m/s, the turning tool is ineffective after machining 3 parts, and at a cutting s...
a) A workpiece (φ-75 mm, 1 275 mm) is machined using turning at a feed rate of 0.25 mm/rev. At a cutting speed- 3.5 m/s, the turning tool is ineffective after machining 3 parts, and at a cutting speed = 2.5 m/s, the turning tool is effective for producing 20 parts. Calculate the Cutting Speed that will allow 30 parts to be machined between tool changes [20 marks] b) An aluminium alloy workpiece (tensile strength - 325 N/mm2 and yield...
In a turning operation, cutting speed = 1.8 m/s, feed = 0.30 mm/rev, and depth of...
In a turning operation, cutting speed = 1.8 m/s, feed = 0.30 mm/rev, and depth of cut = 2.6 mm. Rake angle = 8°. After the cut, the deformed chip thickness = 0.56 mm and before the cut, the chip thickness = 0.26 mm. Determine (a) shear plane angle, (b) shear strain, and (c) material removal rate. Use the orthogonal cutting model as an approximation of turning
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...
Fundamentals of Mechanical Manufacturing Technology: Exercise5 Material-removal Rate The rate (MRR) in turning is the volume...
Fundamentals of Mechanical Manufacturing Technology: Exercise5 Material-removal Rate The rate (MRR) in turning is the volume of material removed per unit time, with the units of m/min De + D t also can be written as MRR = drv Do: Orignal diameter of workpiece,mm Dr: Final diameter of workpiece, mm Davg: Average diameter of workpiece, mm d: Depth of cut, mm f: Feed, mm/rev 4feed rate ofdf-㈢ )-mm, the distance traveled is l mn, the cutting time is Eq. (2)...
.Calculation example of: Power at the Cutting Tool or Power at the Motor A. Example 1:...
.Calculation example of: Power at the Cutting Tool or Power at the Motor A. Example 1: A 175 HB AISI 1040 shaft is to be turned to semi finished on a geared head lathe The following cutting conditions are used Cutting speed = 325fpm, or 100 m/min; Feed rate .016in/rev, or 0.40 mm/rev; Fepth of cut .100in, or 2.54mm Estimate the power at the cutting tool and at the motor required to take this cut in inch and metric.
Flank wear data were collected in a series of turming tests using a coated carbide tool...
Flank wear data were collected in a series of turming tests using a coated carbide tool on hardened alloy steel at a feed of 0.3 mm/rev and a depth of 3.6 mm. At a speed of 120 m/min, flank wear 0.12 mm at 1 min, 0.27 mm at 5 min, 0.5 mm at 10 min, 0.58 mm at 15 min, 0.73 at 20 min, and 0.97 mm at 25 min. At a speed of 160 m/min, flank wear 0.2 mm...
Chapter 15: 1. Shear plane angle and shear strain: In an orthogonal cutting operation, the tool...
Chapter 15: 1. Shear plane angle and shear strain: In an orthogonal cutting operation, the tool has a rake angle = 16°. The chip thickness before the cut = 0.32 mm and the cut yields a deformed chip thickness = 0.72 mm. Calculate (a) the shear plane angle and (b) the shear strain for the operation. 2. Shear strength: The cutting force and thrust force have been measured in an orthogonal cutting operation to be 301 lb and 291 lb,...
in an accelerated tool life test an HSS cutting tool shows a Flank wear of 0.01...
in an accelerated tool life test an HSS cutting tool shows a Flank wear of 0.01 inch in 1 minute of cur while cylindrically turning on a lathe a copper cylinder of 2 inch diameter and sinch long with a workpiece rotational speed 200 rpm and a tool feed rate of 0.01 inch per each rotation of the workpiece and a depth of cut 0.1 inch per pass. When only the workpiece rotational speed is increased to 300 rpm (and...
During the turning operation, the cutting speed = 2.95 m/s, the feed f = 0.40 mm/rev,...
During the turning operation, the cutting speed = 2.95 m/s, the feed f = 0.40 mm/rev, the depth of cut, d = 1.83 mm, the rake angle α = 5° and the deformed chip thickness= 0.58 mm. The workpiece material has volumetric specific heat = 2.96 x10-3 J/mm3- °C, thermal diffusivity = 0.783 cm2/s and specific energy = 1.036 J/mm3, obtained at feed equal to 0.25 mm/rev. The correction factor for the specific energy is CF = 0.75 to-0.21, when...
The following data were collected during tool life tests in turning: (1) when v 100 m/min,...
The following data were collected during tool life tests in turning: (1) when v 100 m/min, T-9 min; (2) when v 75 m/min, T 35 min Tool life for a speed of 110 m/min is:
a) A workpiece (φ-75 mm, 1 275 mm) is machined using turning at a feed rate of 0.25 mm/rev. At a cutting speed- 3.5 m/s, the turning tool is ineffective after machining 3 parts, and at a cutting speed = 2.5 m/s, the turning tool is effective for producing 20 parts. Calculate the Cutting Speed that will allow 30 parts to be machined between tool changes [20 marks] b) An aluminium alloy workpiece (tensile strength - 325 N/mm2 and yield...
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...
Fundamentals of Mechanical Manufacturing Technology: Exercise5 Material-removal Rate The rate (MRR) in turning is the volume of material removed per unit time, with the units of m/min De + D t also can be written as MRR = drv Do: Orignal diameter of workpiece,mm Dr: Final diameter of workpiece, mm Davg: Average diameter of workpiece, mm d: Depth of cut, mm f: Feed, mm/rev 4feed rate ofdf-㈢ )-mm, the distance traveled is l mn, the cutting time is Eq. (2)...
.Calculation example of: Power at the Cutting Tool or Power at the Motor A. Example 1: A 175 HB AISI 1040 shaft is to be turned to semi finished on a geared head lathe The following cutting conditions are used Cutting speed = 325fpm, or 100 m/min; Feed rate .016in/rev, or 0.40 mm/rev; Fepth of cut .100in, or 2.54mm Estimate the power at the cutting tool and at the motor required to take this cut in inch and metric.
Flank wear data were collected in a series of turming tests using a coated carbide tool on hardened alloy steel at a feed of 0.3 mm/rev and a depth of 3.6 mm. At a speed of 120 m/min, flank wear 0.12 mm at 1 min, 0.27 mm at 5 min, 0.5 mm at 10 min, 0.58 mm at 15 min, 0.73 at 20 min, and 0.97 mm at 25 min. At a speed of 160 m/min, flank wear 0.2 mm...
in an accelerated tool life test an HSS cutting tool shows a Flank wear of 0.01 inch in 1 minute of cur while cylindrically turning on a lathe a copper cylinder of 2 inch diameter and sinch long with a workpiece rotational speed 200 rpm and a tool feed rate of 0.01 inch per each rotation of the workpiece and a depth of cut 0.1 inch per pass. When only the workpiece rotational speed is increased to 300 rpm (and...
The following data were collected during tool life tests in turning: (1) when v 100 m/min, T-9 min; (2) when v 75 m/min, T 35 min Tool life for a speed of 110 m/min is:
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