Технология и оборудование производства изделий электронной техники. Шикова Т.Г. - 16 стр.

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16
2/
45,02,027,2 F
=
⋅
=
- & ,   ;
24,83,3)45,05,027,2()5,0(
/
=⋅+=+=
ff
pFFP ! – & ;

89,92,124,8
=
⋅
=
- &     
;
R
U
IU
2
== ;
2
d
l4
R
π
ρ
= ;
d
F
ldlF
K
π
=π= ;
.028,0
14,35
72,2109,51489,9
4
44
3
22
6
3
2
2
32
2
2
2

U
F
d
F
dU
l
dU
P
=
⋅
⋅⋅⋅⋅
==
==
−
π
ρ
ρ
π
ρ
π
F
–   . F
= F+F'.
.61,30
109,51414,389,9
72,25
4
3
6
22
3
2
2
2

FU
l
=
⋅⋅⋅⋅
⋅
==
−
ρπ
π
  –  583, –   l = 31 
 d = 0,0249 .
+ ,- -,./ 0
1. !  RCA ,    898 0 
. , &  6  
($&   6. ),  
"   70 0  " 33 !. % 
& 54 0. !   .
3 * &$ ' " 5$ 
* – +.
2. ! , ,  $$ 
   ., $&  0,7 0 
" 4 ! $&  & 20 0. 
 . +*  &$ ' "
5$  * – +. 
F / = 2,27 ⋅ 0,2 = 0,45                    2
                                               -           &                            ,                                       ;

Pf = ( F + 0,5 F / ) p f = (2,27 + 0,5 ⋅ 0,45)3,3 = 8,24 ! –                                           &                    ;

    = 8,24 ⋅ 1,2 = 9,89                    -               &
                              ;
                                       2
                  U       4ρl                                                                   F
           =U I =    ; R = 2 ; FK = πdl                                                 l=         ;
                   R      πd                                                                    πd
           U πd 2 U π 2 d 3
                      2                        2

       P =       =
            4 ρl   4 ρF
                      4 ρF          9,89 ⋅ 4 ⋅ 51,9 ⋅ 10 −6 ⋅ 2,72
      d =3                        =    3                           = 0,028                                 .
                  U π2                       5 2 ⋅ 3,14 2
                          2




      F –                                                               . F = F+F'.

              U 2 πF
                              2
                                    5 2 ⋅ 2,72 2
      l=3               =3                                = 30,61                                      .
                 π 2 4ρ    9,89 ⋅ 3,14 ⋅ 4 ⋅ 51,9 ⋅ 10 −6
                                                       –                     583, –                                  l = 31
          d = 0,0249               .


              +                            ,-                                -     ,.            /         0

   1. !                       RCA                                   ,                                              898 0
              .                                            ,            &                        6
      (               $&                                                          6 .                      ),
          "                                                    70 0                         "          33 !. %
              &             54 0. !                                                                                                 .
      3                   *        & $                                   '        "               5            $
          *               –+        .
   2. !                                            ,            ,                                          $$
                                                               .         ,                      $&                   0,7 0
              "                   4 !                    $&                             &           20          0.
                                                       .+ *                                      & $             '      "
      5           $                                        *                 –+                   .

                                                                      16

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