Exercises 4 1. A 30 mm diameter mild steel bar is being turned at a spindle speed of 8 rev/s, on a multi-tool centre lathe having eight tools in operation. The feed is 0-3 mm/rev, the specific cutting pressure/tool is 2 000N/mm and the total power consumed for the operation is 14 kW. If the depth of cut is to be kept the same for each tool, calculate the depth of cut/tool in mm.

Exercises 4 1. A 30 mm diameter mild steel bar is being turned at a spindle speed of 8 rev/s, on a multi-tool centre lathe having eight tools in operation. The feed is 0-3 mm/rev, the specific cutting pressure/tool is 2 000N/mm and the total power consumed for the operation is 14 kW. If the depth of cut is to be kept the same for each tool, calculate the depth of cut/tool in mm.

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter5: Turning

Section5.3: Machining Operations On The Lathe

Problem 5RQ: Calculate spindle RPM and machining time for cutting a 1.5" diameter 4" long at 225 SFPM using a...

See similar textbooks

Similar questions

A single-point HSS tool with a 3/64 in nose radius isused in a shaping operation on a ductile steel workpart.The cutting speed is 120 ft/min. The feed is 0.014 in/pass and depth of cut is 0.135 in. Determine the surfaceroughness for this operation.
(j) In a turning operation on stainless steel with hardness = 200 HB, the cutting speed = 250 m/min, feed = 0.3 mm/rev, and depth of cut = 8 mm. How much power will the lathe draw in performing this operation if its mechanical efficiency = 95%. Use Table below to obtain the appropriate specific energy value.
Find the machining time required to turn a mild steel rod from 65mm to 58 mm over a length of 100 mm by using a carbide insert. If the approach length and over run length is taken as 5 mm, Cutting speed as 20 m/min and feed is =0.2 mm/rev, and the depth of cut is 0.5mm
5.) 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 part to be turned in an engine lathe must have a surface finish of 1.6 μm. The part is made of a free machining aluminum alloy. Cutting speed = 150 m/min. The nose radius on the tool = 0.75 mm. Determine the feed that will achieve the specified surface finish.
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.
A turning operation uses a 2/64 in nose radius cuttingtool on a free machining steel with a feed rate = 0.010in/rev and a cutting speed of 300 ft/min. Determine thesurface roughness for this cut.
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. (c) Time for n passes to complete taper turning in minutes .
In an orthogonal cutting operation an 8 mm deep groove is to be turned on a 50 mm diameter steel bar. Spindle speed is 300 rpm and a feed rate of 0.25 mm/rev is given to the tool. Produced chips have a width of 2 mm. Calculate the material removal rate at the beginning and at the end of the cut. Can u help me please?
Q1. A job of diameter 30 mm is being machined at feed of s = 1.0 mm/rev and spindle speed of n = 500 rpm, with a tool of orthogonal rake angle ? = 5° and primary cutting edge angle ? = 60°. Determine the height at which the tool tip should be set to achieve actual rake angle of 0°.
Calculate the machining time required for making 60 holes on an MS plate of 80 mm thickness with a drillbit of diameter 20 mm with a cutting speed V= 40 m/min, the feed f = 0.2 mm/rev. (Assume approach length,A and over run O as 2mm and point angle as 110o). Calculate material removal rate.
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