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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Ch:4 Manufacturing considerations"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## exa 4-1 - Page 112"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
" LLH is 70.0 mm \n",
"\n",
" ULH is 70.013 mm \n",
"\n",
" ULS is 69.99 mm \n",
"\n",
" LLS is 69.98 mm \n",
"\n",
" Cmax is 0.031 mm \n",
"\n",
" Cmin is 0.010 mm \n"
]
}
],
"source": [
"from math import sqrt\n",
"d=70#\n",
"dmin=50#\n",
"dmax=80#\n",
"D=sqrt(dmin*dmax)#\n",
"D=63#\n",
"i=0.458*(D**(1/3))+(0.001*D)#\n",
"\n",
"#standard tolerance for H8 is ST1\n",
"ST1=25*i#\n",
"ST1=ST1*10**-3#\n",
"#standard tolerance of shaft for grade g7 is ST2\n",
"ST2=16*i#\n",
"ST2=ST2*10**-3#\n",
"es=-(2.5*(D**0.333))#\n",
"es=es*10**-3#\n",
"ei=es-ST2#\n",
"#Lower limit for hole is LLH\n",
"#Upper limit for hole is ULH\n",
"#Upper limit for shaft is ULS\n",
"#Lower limit for shaft is LLS\n",
"LLH=d#\n",
"ULH=LLH+ST1#\n",
"ULS=LLH+es#\n",
"LLS=ULS-ST2#\n",
"#Maximum clearance is Cmax\n",
"#minimum clearance is Cmin\n",
"Cmax=ULH-LLS#\n",
"Cmin=LLH-ULS#\n",
"# printing data in scilab o/p window\n",
"print \" LLH is %0.1f mm \"%(LLH)#\n",
"print \"\\n ULH is %0.3f mm \"%(ULH)#\n",
"print \"\\n ULS is %0.2f mm \"%(ULS)#\n",
"print \"\\n LLS is %0.2f mm \"%(LLS)#\n",
"print \"\\n Cmax is %0.3f mm \"%(Cmax)#\n",
"print \"\\n Cmin is %0.3f mm \"%(Cmin)#"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## exa 4-2 - Page 112"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Cmax is 0.041 mm \n",
"\n",
"Cmin is 0.007 mm \n"
]
}
],
"source": [
"d=25#\n",
"#Lower limit for hole is LLH\n",
"#Upper limit for hole is ULH\n",
"#Upper limit for shaft is ULS\n",
"#Lower limit for shaft is LLS\n",
"ULH=d+0.021#\n",
"LLH=d+0#\n",
"ULS=d+0.041#\n",
"LLS=d+0.028#\n",
"#Maximum interference is Cmax\n",
"#minimum interference is Cmin\n",
"Cmax=ULS-LLH#\n",
"Cmin=LLS-ULH#\n",
"# printing data in scilab o/p window\n",
"print \"Cmax is %0.3f mm \"%(Cmax)#\n",
"print \"\\nCmin is %0.3f mm \"%(Cmin)#"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## exa 4-3 - Page 113"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
" ULH is 50.039 mm \n",
"\n",
" LLH is 50.000 mm \n",
"\n",
" ULS is 49.991 mm \n",
"\n",
" LLS is 49.966 mm \n",
"\n",
" Cmax is 0.073 mm \n",
"\n",
" Cmin is 0.009 mm \n",
" Therefore, H8g7 is easy running fit\n"
]
}
],
"source": [
"d=50#\n",
"Es=0.039#\n",
"Ei=0#\n",
"es=-9*10**-3#\n",
"ei=-34*10**-3#\n",
"#Shaft dia is D\n",
"D=d+es#\n",
"#Lower limit for hole is LLH\n",
"#Upper limit for hole is ULH\n",
"#Upper limit for shaft is ULS\n",
"#Lower limit for shaft is LLS\n",
"ULH=d+Es#\n",
"LLH=d+Ei#\n",
"ULS=d+es#\n",
"LLS=d+ei#\n",
"#Maximum interference is Cmax\n",
"#minimum interference is Cmin\n",
"Cmax=ULH-LLS#\n",
"Cmin=LLH-ULS#\n",
" # printing data in scilab o/p window\n",
"print \" ULH is %0.3f mm \"%(ULH)#\n",
"print \"\\n LLH is %0.3f mm \"%(LLH)#\n",
"print \"\\n ULS is %0.3f mm \"%(ULS)#\n",
"print \"\\n LLS is %0.3f mm \"%(LLS)#\n",
"print \"\\n Cmax is %0.3f mm \"%(Cmax)#\n",
"print \"\\n Cmin is %0.3f mm \"%(Cmin)#\n",
"print ' Therefore, H8g7 is easy running fit'"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## exa 4-4 - Page 114"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
" ULH is 30.025 mm \n",
"\n",
" LLH is 30.000 mm \n",
"\n",
" ULS is 30.011 mm \n",
"\n",
" LLS is 29.995 mm \n",
"\n",
" Cmax is 0.030 mm \n",
"\n",
" Cmin is 0.011 mm \n"
]
}
],
"source": [
"d=30#\n",
"Es=0.025#\n",
"Ei=0#\n",
"es=11*10**-3#\n",
"ei=-5*10**-3#\n",
"#Shaft dia is D\n",
"D=d+es#\n",
"#Lower limit for hole is LLH\n",
"#Upper limit for hole is ULH\n",
"#Upper limit for shaft is ULS\n",
"#Lower limit for shaft is LLS\n",
"ULH=d+Es#\n",
"LLH=d+Ei#\n",
"ULS=d+es#\n",
"LLS=d+ei#\n",
"#Maximum interference is Cmax\n",
"#minimum interference is Cmin\n",
"Cmax=ULH-LLS#\n",
"Cmin=ULS-LLH##\n",
"\n",
" # printing data in scilab o/p window\n",
"print \" ULH is %0.3f mm \"%(ULH)#\n",
"print \"\\n LLH is %0.3f mm \"%(LLH)#\n",
"print \"\\n ULS is %0.3f mm \"%(ULS)#\n",
"print \"\\n LLS is %0.3f mm \"%(LLS)#\n",
"print \"\\n Cmax is %0.3f mm \"%(Cmax)#\n",
"print \"\\n Cmin is %0.3f mm \"%(Cmin)#"
]
}
],
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|
