Degarmo's Materials And Processes In Manufacturing
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 31, Problem 41RQ

Why is a gear-hobbing machine much more productive than a gear shaper?

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In orthogonal turning of a cylindrical tube of wall thickness 5 mm, the axial and the tangential cutting forces were measured as 1259 N and 1601 N, respectively. The measured chip thickness after machining was found to be 0.3 mm. The rake angle was 10° and the axial feed was 100 mm/min. the rotational speed of the spindle was 1000 rpm. Assuming the material to be perfectly and Merchant's first solution, the shear strength of the material is closest to
In a production turning operation, the workpart is 60 mm in diameter and 500 mm long. A feed of 0.75 mm/rev is used in the operation. If cutting speed=9 m/s, the tool must be changed every 4 workparts; But if cutting speed=5 m/s, the tool can be used to produce 50 pieces between tool changes. Determine the Taylor tool life equation for this job. (use the equations given below for solution)
In a production turning operation, the workpart is 60 mm in diameter and 500 mm long. A feed of 0.75 mm/rev is used in the operation. If cutting speed-9 m/s, the tool must be changed every 4 workparts; But if cutting speed=5 m/s, the tool can be used to produce 50 pieces between tool changes. Determine the Taylor tool life equation for this job. (use the equations given below for solution) L Tm- 1,= Nf N AD, vT" = C %3| AD,L Tm fv

Chapter 31 Solutions

Degarmo's Materials And Processes In Manufacturing

Ch. 31 - Prob. 11RQCh. 31 - Prob. 12RQCh. 31 - Prob. 13RQCh. 31 - What is the reason for using a taper tap before a...Ch. 31 - Prob. 15RQCh. 31 - Can a fluteless tap be used for threading a hole...Ch. 31 - What provisions should a designer make so that a...Ch. 31 - What is the major advantage of a spiral-point tap?Ch. 31 - Prob. 19RQCh. 31 - Is it desirable for a tapping fluid to have...Ch. 31 - How does thread milling differ from thread...Ch. 31 - What are the advantages of making threads by...Ch. 31 - Prob. 23RQCh. 31 - Prob. 24RQCh. 31 - What is a fluteless tap?Ch. 31 - Why is the involute form used for gear teeth?Ch. 31 - What is the diametral pitch of a gear?Ch. 31 - What is the relationship between the diametral...Ch. 31 - On a sketch of a gear, indicate the pitch circle,...Ch. 31 - What five requirements must be met for gears to...Ch. 31 - What are the advantages of helical gears compared...Ch. 31 - Prob. 32RQCh. 31 - What difficulty would be encountered in bobbing a...Ch. 31 - What is the only type of machine on which...Ch. 31 - Prob. 35RQCh. 31 - Why arent more gears made by broaching?Ch. 31 - What is the most important property of a crown...Ch. 31 - What are three basic processes for machining...Ch. 31 - Which basic gear-machining process is utilized in...Ch. 31 - When a helical gear is machined on a milling...Ch. 31 - Why is a gear-hobbing machine much more productive...Ch. 31 - Prob. 42RQCh. 31 - What are the advantages of cold-roll forming for...Ch. 31 - Prob. 44RQCh. 31 - Under what conditions should shaving not be used...Ch. 31 - Prob. 46RQCh. 31 - Can lapping be used to finish cast iron gears?Ch. 31 - What factors are usually checked in inspecting...Ch. 31 - What are the basic methods for gear finishing?Ch. 31 - A hob that has a pitch diameter of 76.2 mm is used...Ch. 31 - In Figure 31.17, a form-milling operation and...Ch. 31 - A gear-broaching machine can complete the gear in...Ch. 31 - Prob. 4PCh. 31 - If only three gears described in Problem 4 were to...Ch. 31 - Based on the size and shape of the product,...Ch. 31 - What type of engineering materials might be able...Ch. 31 - Prob. 3CS

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