From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 3257/CH9/EX9.6/Ex9_6.sce | 34 ++++++++++++++++++++++++++++++++++
 3257/CH9/EX9.6/Ex9_6.txt |  9 +++++++++
 2 files changed, 43 insertions(+)
 create mode 100755 3257/CH9/EX9.6/Ex9_6.sce
 create mode 100755 3257/CH9/EX9.6/Ex9_6.txt

(limited to '3257/CH9/EX9.6')

diff --git a/3257/CH9/EX9.6/Ex9_6.sce b/3257/CH9/EX9.6/Ex9_6.sce
new file mode 100755
index 000000000..417ccf540
--- /dev/null
+++ b/3257/CH9/EX9.6/Ex9_6.sce
@@ -0,0 +1,34 @@
+
+//Machining time in electrical discharge machining vs drilling
+clc
+d = 12.5 // hole diameter in mm
+I = 100 // current density in A/mm^2 for EDM
+I1 = 5 // current density in A/mm^2 for ECM
+h = 20 // depth in mm
+C = 1.5 
+neeta = 0.92 // efficiency 
+depth = 15 // depth of hole in mm
+N = 325 // rotation in rpm
+f1 = 0.15 // feed in mm/rev
+T_m = 1873.15 // melting point of titanium in K
+t_m = 1373.15 // melting point of electrode in K
+printf("\n Example 9.6")
+printf("\n\n Part A:")
+T_w = T_m -273.15 // melting point in Celsius
+mrr = 4e4*I*T_w^(-1.23)
+v = %pi/4*d^2*h
+t = v/mrr // time by EDM
+f = C*I1*neeta // feed rate
+T_e = depth/f // time by electrochemical machining
+f_rate = N*f1
+T_d = depth/f_rate// time by drilling
+t_edm_ecm = t/T_e // Time ratio between EDM and ECM
+t_edm_d = t/T_d // Time ratio between EDM and drilling
+printf("\n Machining time for EDM is %.1f min.",t)
+printf("\n This time is %.2f time of that for ECM. ",t_edm_ecm) // Answer in book is 2.35 time
+printf("\n This time is %.2f time of that for drilling. ",t_edm_d) // Answer in book is 11.3 times
+printf("\n Part B:")
+t_t = t_m - 273.15
+W_t = 1.1e4*I*t_t^(-2.38)
+printf("\n Wear rate of electrode is %.3f mm^3/min.",W_t)
+
diff --git a/3257/CH9/EX9.6/Ex9_6.txt b/3257/CH9/EX9.6/Ex9_6.txt
new file mode 100755
index 000000000..56374acc0
--- /dev/null
+++ b/3257/CH9/EX9.6/Ex9_6.txt
@@ -0,0 +1,9 @@
+ 
+ Example 9.6
+
+ Part A:
+ Machining time for EDM is 5.4 min.
+ This time is 2.46 time of that for ECM. 
+ This time is 17.41 time of that for drilling. 
+ Part B:
+ Wear rate of electrode is 0.064 mm^3/min. 
\ No newline at end of file
-- 
cgit