Начертательная геометрия
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10. & |
191 |
? D " (%#$ 1144-80), (%#$ 1145-80), (%#$ 1146-80) " ; + " " (%#$ 11473-75) - .
= . 10.21
:
‰ 4 – 3'20 8 '2 1146-80,
" 4 – ; 3 – , ; 20 – + , .
~ D ) " " ( , , .), . 10.22. ".
= . 10.22
‰. ? , D- ' , " D ( . 10.23). & + . ? -' ", " . # D. ! + 1 -(d=d1). ? 2 D d1,.
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! ( + ( . 10.23): d – ;
d1 – ;
l – + ( " + );
l1 – " ( " ) " ; l 0 – " " .
= . 10.23
C l1 " " + -, D D + . C -, – l1=d; " " – l1=1,25d l1=1,6d; -" – l1=2d l1= 2,5d.
C " + + " ".
" :
‰ "20'150 8 '2 22032-76 –
+ l1=d (%#$ 22032-76), -1 ( ), d=20 , +- " P=2,5 ( ), l=150 .
‰ "20' 1,5 '160 8 '2 22040–76 –
2,5
+ l1= 2,5d (%#$ 22040–76), -1 d = 20 , + " P = 1,5, + " P = 2,5 " ,l = 160 .
8 . % – ( , D' -+ . % ) D :
) ;
;
" .
) D " + " ( . 10.24, ); "-+ ( . 10.24, ); + "
10. & |
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, D 2 ( . 10.24, ); ; " ( - , . 10.25, , , . 10.25, , +- , . 10.25, , + , . 10.25, .
20
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= . 10.24
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= . 10.25
194 |
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@ + + " " , |
" D + , " . & " . % + D D+ " . % " D+ " .
? " " D -( . 10.24, ); ; , , .
? " " D " :
1 – ) ;
2 – ) ;
3 –" ) . % 3 D" .
# " D -. " D , " (. * D , " -+ . D " . C D ( D ) -D "-+ ( . 10.24, ).
C , , D -" + ( . 10.24, ).
:
8 "16 8 '2 5915-70 –" 1, -16 , + " .
8 2"16'1,5 8 '2 5915-70 –" 2,16 , + " 1,5 .
‰ . ? – ( " , D D " " .
* " :
" . B " ( . 10.26, ), ( . 10.26, ) +- ;
D -. @ , ( . 10.27), + .
@ . 10.28 – " + " +-" .
10. & |
195 |
? " D : + -%#$ 11371-78, + , + + . ? D : 1 ) ,2 ) ( . 10.26, ). # D , "-1 48 .
" + 1 -12 :
‰ 12 8 '2 11371-78.
C " + , 2, :
‰ 2.12 8 '2 11371-78.
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= . 10.26
? (%#$ 6402-70) D " -, D' -( . 10.27).
= . 10.27
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= . 10.28
+ D : " (<), (@), ($) (#$). ! -+ -+ ( @ D ).
, " :
‰ 127 8 '2 6402-70 , + , "- , 1, 12 .
F$( ! *
$ - , D ) " .
# -D!, " - " . ! . $ - " ) .
( «$» - D ) , , , D
.
«$» D !, " – <. - + " " -.
:
10. & |
197 |
1.$ , , "- , 40 , , ) :
2 40 8 '2 3262-75.
2.$ ) :
2 " – 40 8 '2 3262-75.
3.$ 8 , :
2 3 – 40 – 8000 8 '2 3262-75.
– ) " – D, " ," " .
C ) " D. C + " " D ) ,D D' . @ . 10.29, -, . 10.29, – ) %#$ 8954-75,. 10.29, – " " %#$ 8946-75, . 10.29, – " %#$ 8948-75.
d |
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= . 10.29
D -, , .
@ :
" 40 8 '2 8954-75 – ) -D! =40 ;
~ 40 8 '2 8946-75 – "D! = 40 .
/ ) - , ) D :
" 32'25 8 '2 8957-75 – )D!=32 D!=25 .
198 .
H " ( $(
& D - : , % .
D, - D' .
! 'D D' :
) D + " d;
) ) , , + " ,) " , " + D ;
) D , + (" D+ );
") D 0,85 d;
) + - D ;
) , + , -( ) D ;
) " " ) " -D , D ;
) , , -D , + " D' 2s. @ , -, D , + D " 45°' 2s. / ( + -D , " - " D " 45° ( . 10.30);
) + " " " , -) , " + , +' D . B -+ " ' D ( . 10.31).
= . 10.30 |
= . 10.31 |
10. & |
199 |
) "
N ( . 10.32) , " , +.
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= . 10.32
200 |
. |
D - . @ . 10.32,' . N , + " -, D' . @ . 10.32, "+ , . @ . 10.32, ' " ,+ .
# + -d . C D' (H1+H2), ' + S, -" H " " K. D ' D D -D' " + D + D -
D .
) C$
@ . 10.33, -+ , " + , -, D' . @ . 10.33, + " - , + ," .
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= . 10.33