Turning is a machining process in which a single-point tool removes material from the surface of a rotating cylindrical workpiece, the tool being fed in a direction parallel to the axis of work rotation The difference between a live center and a dead center used in the context of work holding in a lathe. A center holds the work during rotation at the tailstock end of the lathe. A live center is mounted in bearings and rotates with the work, while a dead center does not rotate - the work rotates about it. mounted in bearings and rotates with the work, while a dead center does not rotate - the work rotates about it(a) true or (b) false

Turning is a machining process in which a single-point tool removes material from the surface of a rotating cylindrical workpiece, the tool being fed in a direction parallel to the axis of work rotation The difference between a live center and a dead center used in the context of work holding in a lathe. A center holds the work during rotation at the tailstock end of the lathe. A live center is mounted in bearings and rotates with the work, while a dead center does not rotate - the work rotates about it. mounted in bearings and rotates with the work, while a dead center does not rotate - the work rotates about it(a) true or (b) false

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1. In a production turning operation, the cylindrical workpiece is 425 mm long and 190 mm in diameter, Feed 0.30 mm/rev. What cutting speed must be used to achieve a machining time of 7.0 min?
A cylinder of 155 mm diameter is to be reduced to 150 mm diameter in one turning cut with a feed of 0.15 mm/rev and a cutting speed of 150 m/min on a NC lathe. What are the programmed feed rate and the material removal rate
INo Spac.Heading Heading 2 Title Subtitle Subtle Em... Emphasis Intense E. Intense Q. Subtle Ref.. = Strong Quote Paragraph Styles 3 6. . .7 I The mill project will have a vertical miller (with a set of collets). There will be several end mills 2", 5/8", and 7/8" in diameter. The same drill bits that were available for the lathe project will be available for the miller project ((sizes 1/16"to ½" diameter), as will the measuring tools (micrometer and a Vernier caliper). There will also be thread form tools 10-32 and "-20. 2.108 1500 1.750 Ø 0.875 #7 Drill Thru to 7/8 Dia. -3/8 Dia. x .25 Deep R 0.467 9.5' 0.625 1.500 REF 0.937 0.867 0.617 0.937 31 0.305 0.750 0.250 0.121 t0.541 1.438 3x 0 0.180 Thru Threadform 10-32 UNFX.50 Deep 1.063 2.250 0.219 2.750 All Units in Inches Tolerance on Dimensions X or Fractional +/-1/32" XX +/- .01 „XXX +/- .005 Please Describe in detail all the steps in chronological order and dimensions to machine this piece A Focus
The part in Figure 1 is to be drilled on a turret-type drill press. The part is 15.0 mm thick. Threedrill sizes will be used: 8 mm, 10 mm, and 12 mm, which are to be specified in the part programby tool turret positions TO1, T02, and T03. All tooling is high speed steel. Cutting speed = 75mm/min and feed = 0.08 mm/rev. Use the lower-left corner of the part as the origin in the x-y axissystem. Write the part program in the word address format using absolute positioning.
1. In face milling, the axis of the cutter is tangent to the surface being milled. (a) true or (b) false 2. When product variety is hard, the usual approach is batch production.(a) true or (b) false 3. In a turning operation, the change in diameter of the workpart is equal to which one of the following:(a) 1 x depth of cut, (b) 2 x depth of cut. (c) 1 x feed, or (d) 2 x fe feed? 4. A turning operation is normally performed on which one of the following machine tools: (a) drill press, (b) lathe, (c) milling machine, (d) planer, or (e) shaper? 5. Machined parts can be classified as rotational or nonrotational. Which of the following are examples of operations that create nonrotational geometries: (a) boring, (b) drilling, (c) milling. (d) planning, and (e) turning?
In a turning operation on low carbon steel with hardness = 135 HB, the cutting speed = 180 m/min, feed = 0.35 mm/rev, and depth of cut = 6.5 mm. The original work piece has 26 mm Diameter and 120 mm Length. How much power will the lathe draw in performing this operation if its mechanical efficiency = 90% and operator's efficiency = 82%? The specific energy is 3.8 J/mm³
In a turning operation, cutting speed =200 m/min; feed = 0.25mm mm/rev, and depth of cut = 4.00mm Thermal diffusivity of the work material = 20m mm^2/s and volumetric specific heat =3.5(10^ -3 )J/mm^ 3 -C If the temperature increase above ambient temperature (20degreesC) is the angle measured by a tool-chip thermocouple to be 700degreesC, determine the specific energy for the work material in this operation.
A NC lathe cuts two passes across a cylindrical workpiece under automatic cycle. The operator loads and unloads the machine. The starting diameter of the work is 3.00 in and its length = 10 in. The work cycle consists of the following steps (with element times given in parentheses where applicable): 1 - Operator loads part into machine, starts cycle (1.00 min); 2 - NC lathe positions tool for first pass (0.10 min); 3 - NC lathe turns first pass (time depends on cutting speed); 4 - NC lathe repositions tool for second pass (0.4 min); 5 - NC lathe turns second pass (time depends on cutting speed); and 6 - Operator unloads part and places in tote pan (1.00 min). In addition, the cutting tool must be periodically changed. This tool change time takes 1.00 min. The feed rate = 0.007 in/rev and the depth of cut for each pass = 0.100 in. The cost of the operator and machine = $39/hr and the tool cost = $2.00/cutting edge. The applicable Taylor tool life equation has parameters: n = 0.26 and…
Q.1 A turning operation uses a rotation speed = 150 rpm, feed = 0.38 mm/rev, and depth of cut = 5.00 mm. The diameter of the workpiece before cut is 50mm and it is length was 350mm. .Calculate the material removal rate
Problem 2. (Determining Cutting Speeds in Machining Economics) A turning operation is performed with HSS tooling on mild steel, with Taylor tool life parameters n = 0.12, C = 60 m/min. Work part length = 450 mm and diameter = 80 mm. Feed = 0.20 mm/rev. Handling time per piece = 4.0 min, and tool change time = 1.5 min. Cost of machine and operator = $27/hr, and tooling cost = $2 per cutting edge. Find the a. cutting speed for maximum production rate and b. cutting speed for minimum cost Problem 3. (Production Rate and Cost in Machining Economics) For the two cutting speeds computed in problem 2, determine: the hourly production rate and a. b. the cost per piece.