DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Textbook Question
Chapter 24, Problem 10RQ
In Figure 24.2b, the tool material is carbide. Would you change the process to climb milling?
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d) A face milling operation is used to machine 6.0 mm from the top surface of a rectangular
piece of aluminum 300 mm long by 125 mm wide in a single pass. The cutter has four teeth
(cemented carbide inserts) and is 150 mm in diameter. The cutting speed = 2.8 m/s, and
chipload = 0.27 mm/tooth. Assuming that the cutter enters the workpiece from its short side
and follows a path that is centered over the workpiece, determine:
i) the actual machining time to make the pass across the surface and,
ii) the maximum metal removal rate during cutting.
For pocket operation of 2 x 3 inch surface and dept of 0.06 in using 0.5 in end mill tool. What is the time required to finished a cut when the depth of cut is 0.3 inch and the feed rate 0.05 inch/rev, spindle RPM is 60.
The subject is Machine Shop Theory. Please make clear the solution and answer and understandable. Thanks
In 3-axis milling, the table feedrate is
703.00 mm/min. Using a 10mm
endmill to cut the material with a
radial depth of 4.60 mm and axial
depth of 4.20 mm, what is the
material removal rate (Cm³ /min) in
this operation?
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Chapter 24 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 24 - Suppose that you wanted to machine cast iron with...Ch. 24 - How is the feed per tooth related to the feed rate...Ch. 24 - Why must the number of teeth on the cutter be...Ch. 24 - Why is the question of up or down milling more...Ch. 24 - For producing flat surfaces in mass-production...Ch. 24 - Milling has a higher metal removal rate than...Ch. 24 - Which type of milling (up or down) is being done...Ch. 24 - Why does down milling dull the cutter more rapidly...Ch. 24 - What parameters do you need to specify in order to...Ch. 24 - In Figure 24.2b, the tool material is carbide....
Ch. 24 - What is the advantage of a helical-tooth cutter...Ch. 24 - What would the cutting force diagram for Fc look...Ch. 24 - Could the stub arbor-mounted face mill shown in...Ch. 24 - In a typical solid arbor milling cutter shown in...Ch. 24 - Make some sketches to show how you would you set...Ch. 24 - Make some sketches to show how you would set up a...Ch. 24 - Explain how controlled movements of the work m...Ch. 24 - Prob. 18RQCh. 24 - What is the purpose of the hole-circle plate on a...Ch. 24 - You have selected a feed per tooth and a cutting...Ch. 24 - How much time will be required for a milling...Ch. 24 - If the depth of cut is 0.35 in., what is the metal...Ch. 24 - Prob. 4PCh. 24 - Calculate the spindle rpm and table feed (ipm) for...Ch. 24 - A gray cast iron surface 6 in. wide and 18 in....Ch. 24 - Prob. 7PCh. 24 - In Figure 24.12, the feed is 0.006 in. per tooth....Ch. 24 - Suppose you want to do the job described in...Ch. 24 - The Bridgeport vertical-spindle milling machine is...Ch. 24 - The KC Machine Works, which does job shop...
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- 4. Explain the differences between the up milling and down milling?arrow_forwardIn 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?arrow_forwardIn an orthogonal machining with a tool of gº orthogonal rake angle, the uncut chip thickness is 0.2 mm. The chip thickness fluctuates between 0.25 mm and 0 4 mm what is the ratio of the maximum shear angle to the minimum shear angle during machining?arrow_forward
- Consider a profile milling operation, where the initial (stock) geometry has (X,Y,Z) dimensions of 100 mm x 75 mm x 50 mm. The target part has dimensions of 95 mm x 70 mm x 50 mm. The target part is located in the centre of the stock part, i.e. the stock to be removed from all sides is equal. The operation has a cutting time of 1 minute. The tool axis is along the Z direction and the tool diameter is 12 mm having 6 cutting edges. The takes place at 54m/min feed rate of 0.2 mm/rev/tooth. Calculate the axial depth of cut ? process at aarrow_forwardA cylindrical rod is machined using turning processes. It is given that the cutting speed is 120min ¹, and feed per tooth is 0.0025 m/min. The outer diameter is 35mm, the length of the rod is 130m and the inner diameter is 22mm. The number of teeth is 6. Find Rotational speed, Feed rate, Machining time, and Depth of cut.arrow_forwardWhat are Commercial-Scale and Small-Scale Milling Systems? Give examples for each.arrow_forward
- Problem 2. Turning Consider Step 2 (Turn Shoulder) in machining the flashlight handle (Figure 2). STEP 1: CUT TO LENGTH STEP 2: TURN SHOULDER 0.600 1.0" 3.000 -0.440 Figure 2. Turning step for Problem 2. i) Calculate the (1) cutting time (in s), (2) the material removal rate (in in3 /s or mm3/s) for this cut, assuming you remove all of the material with one pass (i.e., depth of cut d = (1"-0.6")/2 = 0.2"), and (3) the power (hp or W) required for this turning operation: Consider the following scenarios: Feed (f) in/rev Rotational Speed Cutting Time MRR Power (n) in RPM 0.02 1000 ? ? ? 0.025 900 ? ? ? 0.03 800 ? ? ? 1 j) What changes could you make to the process if you needed to decrease the power requirement?arrow_forward21.17 What is shaping in machining? When would it be used?arrow_forwardIn orthogonal machining operation the chip thickness and the uncut chip thickness are equal to 0.45 mm. If the tool rake and is 0 deg. What is the shear plane angle?arrow_forward
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