Начертательная геометрия

10. &

201

% " D ) l3=l1+l2, l1=d -, l1=1,25d - " , l1=2d - D . l2=63, " 3 - + " , l4=4P. + D " " - ' D > . " " ," + , + + . # D' -" . ?+ " .

@ . 10.33, ' + , + .

C l + D " , D , , D + .

) "

B D .D D . # " . # D' ' .

= . 10.34

202

.

% + ". = , , )-" D D' -. @ . 10.34, " , , D' . @ . 10.34, – ' ( " . -D ," " " . -+ , +> 2 – 3 + " . *.

10.4. p#" "- ( % l %$ ( &" )% %*

‰ – ( , -' " ( ) " ( ).

@ + , " .

+ 5 D , %#$ 23360-78, D' – %#$ 8790-79. & +-D %#$ 24068-80 " . " + %#$ 24071-80.

@ + D + , -( . 10.35).

N " ( + – .

+ , – - " ' " .

' +«? », + ( " ),b ' h ' l + .

:

‰ 2 – 18'11'100 8 '2 23360-78,

" 2 – + ; 18 – + + , ; 11 – + , ; 100 – + , .

10. &

203

*

= . 10.35

4 5 D %#$ 24068-80 -( . 10.36). D . =– " . ; " + – .

+ D - , + .

‰ 4 – 18'11'100 8 '2 24068-80, " 4 – + ;

18 – + , ;

11 – , ;

100 – , .

‰ D %#$ 24071-80 -( . 10.37). D + ' -( " ) +(d 55 ).

204

.

*

= . 10.36

= . 10.37

10. &

205

" :

‰ 5'6,5 8 '2 24071-80,

" 5 – + , 6,5 – + , ( 1).

@ . 10.38 + -

.

= . 10.38

‰ . B D " +- . + . B -+ ' D +-.

= . 10.39

206

.

? " D ( ) - " , ( " ) . -D' " ) -.

@ + " -) , %#$ 1139-80. " -+ D -. 'D, d " b ( . 10.39).

" %#$ 2.409-74, -D ' . # D'D + ,– + . @ ( )+ D , + . ? ( - D ( . 10.39). @ -D + . @ ,, D - " , D ) " ( )) , " . < ++ " -. – . % , " " ) " , D + . @D " ) l1 " . C-D l, + -Rmax, " l2 ( . 10.40, )." D, ( . 10.41).

= . 10.40

10. &

207

+ " - :

) d ( . 10.40, ): d–6'28'34'6, " d – ; 6 – ; 28 –

; 34 – ; 6 – + ; ) + D ( . 10.40, ):

	D–8'32'38'8, " D – -
	; 8 – ; 32 – -
	; 38 – ; 8
	– + .
	@ "-
	D ,
	" " -
= . 10.41	+ : 8'36'40'7
	( . 10.41).

10.5. =o : ( &" )% %*. " )% %* & +"0, # 0+"0 % &+ % % :

@ > , - D " , ( , -, , -. & " ( -, ( + .

) ( ! !

= D D' :

— ( ,( . 10.42, ). # D;

— ( , -" ( . 10.42, ). # D !;

— , " ( " " ( ( . 10.42, ). # D $;

1 — , (D " " ( . 10.42, ). # D @.

208

.

" , + DD' D ," , D 5 .

+ D D' :5 – + " ;

5 – + " " , " " ;

5 – + " , -' D - .

= . 10.42

+ D' : - , + ) , ) " , . ., - " + . + " . – + . + – + . + " 5 1 . • + – ( -+ " , "" " . ‰ 1-+ – + " ," " .

C + " , ,. 4 5 – ( + -" "- " + .

( C

" %#$ 2.312-72, +D : — + -' s ( . 10.42, , ), – + -' s/2 ( . 10.42, , ).

10. &

209

D «+». I D +. @ D .

C + " - D - , D - D + ' s/2 – s/3. @ -+ " 30 – 60°. &- D " D '- . -. -" + .

-: , - -+ – . 10.43, , - , " – . 10.43, .

= . 10.43

@ . 10.44 - " + " %#$ 2.312-72. + ' D

= . 10.44

1. " + "

+ .

2.@ D + .

3.N – ) + -" D. @ : 4 – + ".

210

.

4.! ( -( " ).

5.I + .

6.= + ( , .).

7." + .

& :

]1 – " + -l + " t ( . 10.45);

]2 – " + + -l t ( . 10.45);

= . 10.45

]3 – + -+ + ;

]4 – " +;

]5 – " "

+ ;

]6 – + ; ]7 – + ,

;

]8 – " ' D .

# + -+ - - " + D + ,, : «+ 5 1-1 1 5...».

N ) + + ) 5 , ) (3,5 .