Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 24, Problem 7P
To determine
The break even quantity below which the shaper machine is more economical than milling.
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A lineshaft runs at 380 rpm. A 18 inches pulley on the same shaft is belt connected to a 12 inches pulley on the countershaft. From a 15 inches pulley on the countershaft, motion is transmitted to the machine. Compute the required diameter (in inches) of the pulley of the machine to give a spindle speed of 660 rpm.
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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- Solve First one Onlyarrow_forwardA workpiece turning at 20 rad/sec has a diameter of 4 inches. Find the peripheral speed of the workpiece.arrow_forwardA facing operation is performed on an lathe. The diameter of the cylindrical part is 6 in and the length is 15 in The spindle rotates at 180 rpm. Use depth of cut of 0.110 in and feed of 0.008 in rev. Determine: a) The cutting speed of the tool (in/min) b) The tool feed rate (in min) c) The cutting time (sec)arrow_forward
- 1. In Figure 1, the feed is 0.006 in. per tooth. The cutter is rotating at an rpm that will produce the desired surface cutting speed of 125 fpm. The cutter diameter is 3 in. The depth of cut is 0.15 in and width of the cut is 2 in. The block is 5 in. wide and 12in long. Determine a. The feed, in inches per minute. b. Approach distance for this type of milling c. Cutting time to make one pass across the surface d. If an additional approach distance of 0.5 in is provided at the beginning of pass and an over travel distance is provided at the end of pass equal to the cutter radius plus 0.5 in, what is the duration of the feed motion? Speesi neten Cite Citter praiten t staof cit Solld hellcal plain milling cuttar Wout Helical teeth TUp w Figure: 01arrow_forwardSolve it quickly pleasearrow_forwardTYPEWRITTEN ONLY PLEASE FOR UPVOTE. DOWNVOTE FOR HANDWRITTEN. DO NOT ANSWER IF YOU ALREADY ANSWERED THIS. I'LL DOWNVOTE.arrow_forward
- Briefly describe the process of locating the center of an existing hole on a vertical milling machine.arrow_forwardIn a lathe machine, The diameter of the driver and driven pulley are 2745 mm and 1200 mm respectively, And the driver pulley runs at speed of 225 rpm. Find the speed at which is driven pulley runs in the machine. the speed of the driven pulley in rpm isarrow_forwardMatch column A with Column B (Return this page with your answer sheet) No Column A These are machine tools in which components are Column B No Multi-Spindle A machined. Automatics Several tools are used so that the turning is Broaching B completed in one cycle. 3 Designed for high production rate machining of screws and similar threaded parts, Job Production 4 These lathes have four to eight spindles arranged Flow Production in a circle on a large drum. This operation is like shaping with multiple teeth E Batch Production and is used to machine internal and external surfaces such as holes of circular. 6 The workpiece is supported on its OD and rotated F Auto Lathe around an axis created by this reference surface. The workpiece is free to shift, and if the support surface is the one being ground, the axis of rotation also shifts. Manufacturing of single, or few products to a Electrical copying System G customer's individual specification. 8 Parts are manufactured in fixed quantities H…arrow_forward
- 2. Write a complete program to mill around the part. The endmill is .500 diameter, and you want to leave .010 stock for a finish pass. Enter a diameter offset number (Dn) command for tool DIAMETER Geometry of .520 for machining a roughing pass around part. And then define another pass around part using the same program coordinates but a different diameter offset number (Dn), and enter in the correct diameter offset value of .500 to machine part to the finish size. TOOL 1 has 0.520 in D21 and 0.500 in D01 Tool Speed (rpm) Feed (ipm) Operation Finish outside contour, x .50 deep Tooling 1 .5D endmill 1200 6. 25 R.25 2 PL. R .50 2.00 XO YO 4.0 SO. 1.0 SQ. 5 DA. EM 1.250- X-2.5 Y-2.0 START POINTarrow_forwardPlease answer ASAP. I will rate helpful.arrow_forwardA two-spindle drill cuts two holes at the same time, one 1/2 inch and one 3/4 inch. The workpiece is 1.0 inches thick. Both drills have point angles of 118 degrees and the cutting speed for the material is 300 ft/min. The rotational speed of each drill can be set individually but the feed rate for both holes must be set to the same value because they move together into the material. The feed rate is set so that the total metal removal rate of both drills combined does not exceed 1.50 in3/min. Determine (a) maximum feed rate (in/min) that can be used, (b) individual feeds (in/rev) for each hole, and (c) cutting time for the operation.arrow_forward
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