d) Use the Taylor Tool Life equation to estimate the tool life (in minutes) for this operation. Use the table below to pick appropriate values of C and n (the flashlight material is titanium and the tools are high-speed steel). How many such holes would you be able to drill before the tool needs to be replaced? Nonsteel Cutting Steel Cutting Tool Material m/min (f/min) m/min fumin Plain carbon tool steel 70 (200) (350) (2700) 0.1 20 60 High-speed steel 0.125 120 70 200 Cemented carbide 0.25 900 500 1500 2000 2200 Cermet 0.25 600 Coated carbide 0.25 700 Ceramic 0.6 3000 10,000 Compiled from (4). [9), and other sources. The parameter values are approximated for turning at feed 0.25 mm/rev (0.010 in/rev) and depth 2.5 mm (0.100 in). Nonsteel cutting refers to casy-to-machine metals such as aluminum, brass, and cast iron. Steel cutting refers to the machining of mild (unhardened) steel. It should be noted that significant variations in these values can be expected in practice. Table 1. Representative values of n and C in the Taylor tool life equation for selected tool materials (from M.P. Groover, Eundamentals of Modern Manufacturing, 5" ced.) e) Estimate the power (in hp or W) required for this operation. The specific energy requirements in cutting operations (Table 21.2 in Kalpakjian, 7th ed.) can be applied to drilling processes, where the specific energy for titanium is 0.3 hp-min/in3.
d) Use the Taylor Tool Life equation to estimate the tool life (in minutes) for this operation. Use the table below to pick appropriate values of C and n (the flashlight material is titanium and the tools are high-speed steel). How many such holes would you be able to drill before the tool needs to be replaced? Nonsteel Cutting Steel Cutting Tool Material m/min (f/min) m/min fumin Plain carbon tool steel 70 (200) (350) (2700) 0.1 20 60 High-speed steel 0.125 120 70 200 Cemented carbide 0.25 900 500 1500 2000 2200 Cermet 0.25 600 Coated carbide 0.25 700 Ceramic 0.6 3000 10,000 Compiled from (4). [9), and other sources. The parameter values are approximated for turning at feed 0.25 mm/rev (0.010 in/rev) and depth 2.5 mm (0.100 in). Nonsteel cutting refers to casy-to-machine metals such as aluminum, brass, and cast iron. Steel cutting refers to the machining of mild (unhardened) steel. It should be noted that significant variations in these values can be expected in practice. Table 1. Representative values of n and C in the Taylor tool life equation for selected tool materials (from M.P. Groover, Eundamentals of Modern Manufacturing, 5" ced.) e) Estimate the power (in hp or W) required for this operation. The specific energy requirements in cutting operations (Table 21.2 in Kalpakjian, 7th ed.) can be applied to drilling processes, where the specific energy for titanium is 0.3 hp-min/in3.
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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