圖1 |
圖2 |
tga=tg∠ABC= | R+a+b | = | R+a+dcosg/2 | = | 2R+2a+dcosg |
AB | (D2/4-a2)?+dsing/2 | (D2-4a2)?+dsing |
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(1) | ||||||||||||
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(2) |
H=KM=OO\'·cos∠OO\'M-d/2=Rcosa-d/2 | (3) |
h=OF=OC·sin∠OCF=Dsin[a-arcsin(2a/D)]/2 | (4) |
b= | A\'B\' | = | R+a+dcosg/2 | = | 2R+2a+dcosg |
B\'C\' | Lsina | 2Lsina |
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(5) | ||||
實(shí)長S=A\'C\'=L/cosb | (6) |
圖3 |
OE=OB/sin | av | =D/(2sin | av | ) |
2 | 2 |
CE=AC/tg | av | =N/(2tg | av | ) |
2 | 2 |
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(7) |
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(8) |
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(9) |
a=arctg | 2×60+2×15+65.7cos50° | =58.1087° |
(75.52-4×152)?+65.7sin50° |
T=110+ | 1 | (75.5/sin | 90° | -80/tg | 90° | )=123.39mm |
2 | 2 | 2 |
75.5sin(58.1087-arcsin | 2×15 | /2=21.49mm |
75.5 |
b1=b2=b3=b4=arctg | 2×60+2×15+65.7cos50° | =59°45\'25" |
2×66×sin58.1087° |
S1=S2=S3=S4= | 66 | =131.04mm |
cos59°45\'25" |
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