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

---
 3308/CH20/EX20.1/Ex20_1.sce | 22 ++++++++++++++++++++++
 3308/CH20/EX20.1/Ex20_1.txt |  5 +++++
 3308/CH20/EX20.2/Ex20_2.sce | 17 +++++++++++++++++
 3308/CH20/EX20.2/Ex20_2.txt |  4 ++++
 4 files changed, 48 insertions(+)
 create mode 100755 3308/CH20/EX20.1/Ex20_1.sce
 create mode 100755 3308/CH20/EX20.1/Ex20_1.txt
 create mode 100755 3308/CH20/EX20.2/Ex20_2.sce
 create mode 100755 3308/CH20/EX20.2/Ex20_2.txt

(limited to '3308/CH20')

diff --git a/3308/CH20/EX20.1/Ex20_1.sce b/3308/CH20/EX20.1/Ex20_1.sce
new file mode 100755
index 000000000..93bd6b3d2
--- /dev/null
+++ b/3308/CH20/EX20.1/Ex20_1.sce
@@ -0,0 +1,22 @@
+clc 
+// Given that
+to=0.005//in inch depth of cut
+V=400//in ft/min cutting speed
+X=10//in degree rake angle
+w=0.25//in inch width of cut
+tc=0.009//in inch chip thickness
+Fc=125//in lb Cutting force
+Ft=50//in lb thrust force
+
+// Sample Problem on page no. 548
+
+printf("\n # Relative Energies in cutting # \n")
+
+r=to/tc//cutting ratio
+R=sqrt((Ft^2)+(Fc^2))
+B=acosd(Fc/R)+X//friction angle
+F=R*sind(B)
+P=((F*r)/Fc)*100
+printf("\n\n Percentage of total energy going into overcoming friction =%d pecrent",P)
+
+//Answer in the book is approximated to 32 due to approximation in calculation of R and B
diff --git a/3308/CH20/EX20.1/Ex20_1.txt b/3308/CH20/EX20.1/Ex20_1.txt
new file mode 100755
index 000000000..7c219531f
--- /dev/null
+++ b/3308/CH20/EX20.1/Ex20_1.txt
@@ -0,0 +1,5 @@
+ 
+ # Relative Energies in cutting # 
+
+
+ Percentage of total energy going into overcoming friction =31 pecrent 
\ No newline at end of file
diff --git a/3308/CH20/EX20.2/Ex20_2.sce b/3308/CH20/EX20.2/Ex20_2.sce
new file mode 100755
index 000000000..d93338bc0
--- /dev/null
+++ b/3308/CH20/EX20.2/Ex20_2.sce
@@ -0,0 +1,17 @@
+clc 
+// Given that
+n=0.5//exponent that depends on tool and workpiece material
+C=400//constant
+
+// Sample Problem on page no. 555
+
+printf("\n # Increasing tool life by Reducing the Cutting Speed # \n")
+
+V1=poly(0,"V1")
+r=0.5// it is the ratio of V2/V1 where V1 and V2 are the initial and final cutting speed of the tool
+//let t=T2/T1 where T1 and T2 are the initial and final tool life
+t=1/(r^(1/n))//from the relation V1*(T1^n)=V2*(T2^n)
+P=(t-1)*100
+printf("\n\n Percent increase in tool life  =%d Percent",P)
+
+
diff --git a/3308/CH20/EX20.2/Ex20_2.txt b/3308/CH20/EX20.2/Ex20_2.txt
new file mode 100755
index 000000000..6e441f1e6
--- /dev/null
+++ b/3308/CH20/EX20.2/Ex20_2.txt
@@ -0,0 +1,4 @@
+ # Increasing tool life by Reducing the Cutting Speed # 
+
+
+ Percent increase in tool life  =300 Percent 
\ No newline at end of file
-- 
cgit