Determine shear
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- During orthogonal cutting of MS with a 10 ° rake angle tool, the chip thickness ratio was obtained as 0.4. Calculate shear angle5.) Calculate the machining time required to reduce from 60mm diameter shaft to 50mm diameter, for a length of 1500mm with depth of cut 2mm for rough cut and 1mm for finish cut. Cutting speed and feed may be assumed as 30m/min and 0.5mm/rev respectively.A bar of 70 mm diameter is being cut orthogonally and is reduced to 68 mm by cutting tool in case mean length of the chip is 68.9 mm. find the cutting ratio determine shear angle also if the rake angle is 10 degree.
- A single-point cutting tool with 12° rake angle is used to machine a steel work-piece. The depth of cut, i.e. uncut thickness is 0.81 mm. The chip thickness under orthogonal machining condition is 1.8 mm. What is the shear angle.If a fairing operation is executed at a rotational speed of 40.0 rev / min, the feed is 0.015 in / rev and the depth of cut is 0.180 in, it determines: a) cutting time to complete the fairing operation; and b) the cutting speed; and c) The speed of metal removal at the beginning and end of the cut d) The power dissipated.Calculate the time required for completing a 5mm deep finishing cut on a 150mm wide, 600mmlong face of a 25mm thick steel block using a face milling cutter of 150mm diameter with 6teeth. The cutting condition are Vc =1.5m/sec and fz = 0.1mm.
- A cylindrical workpiece has a 14.0 in diameter and has 30 in long. It is to be turned in an engine lathe at the following cutting conditions: cutting speed = 400 ft/min, feed = 0.015 in/rev, and depth of cut = 0.150 in. Determine the time to complete one turning pass if the approach and overtravel allowances are each 0.25 in (total = 0.50 in). Note: 1 ft = 12 inI a orthogonal Turning lathe machine of diameter rod of 100 mm, Rake angle: +15°,Uncut chip thickness 0.5 mm, nominal chip thickness after the cut 1.25 mm. Find the shear angle.In a machine test, a cutting speed of 100 m/min indicated the tool life as 16 min and a cutting speed of 200 m/min indicated the tool life as 4 min. Calculate the values of n and C.
- A shaft groove with a length of 250 mm and a depth of 12 mm is cut by a 20 mm diameter slot cutter. What is the processing time if the cutting depth is to be 4 mm. The feed is 25 mm/min. Over run is 1/2 the cutter diameter.Assume that, in orthogonal cutting, the rake angle, oz,is 20° and the friction angle, B, is 35° at the chip-tool interface.Determine the percentage change in chip thickness when the friction angle is 50°. (Note: do not use Eq. (21.3)Figure and table given below shows the design details of a taper turning operation with a cutting speed of 22 m/ minute, feed 0.2 mm/ revolution; Depth of cut of 0.5 mm. Using the given data find the following. (d) Time for single pass "Tsingle" in minutes