????? ?????? ????? ???? Computer Aided Design - PowerPoint PPT Presentation

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????? ?????? ????? ???? Computer Aided Design

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Title: Author: RAMI Last modified by: Created Date: 2/24/2002 7:53:02 PM Document presentation format: – PowerPoint PPT presentation

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Title: ????? ?????? ????? ???? Computer Aided Design


1
????? ?????? ????? ????Computer Aided
Design ???? ???"?
2
???? ???? ?????? ???? ????????
alhanaty_at_bezeqint.net ???? ????? ??? ?
1400-1700 ??? ???? ??? ? 1230-1330
3
????? ?????
  • ???? ????"?
  • ????? ??????
  • ???????? ???????????
  • ??? ????????
  • ????? ????? (Bezier) ????? ?????????
  • ????? ?????? (Spline) ????? ?????????
  • ????? ?????? ???????? (Nurbs)
  • ?????
  • ?????? ????????????

4
????? ????? (????)
  • ??????
  • ???? ?????? ????????
  • ????? ?????
  • ???? ?????? ????????

5
?????
  • Curves and Surfaces for CAGD/Gerald Farin, Fifth
    edition, Morgan Kaufmann Publishers 2002.
  • The NURBS Book/Les Piegl and Wayne Tiller, Second
    edition, Springer Verlag, 1997.
  • Computer Aided Geometric Design/Josef Hoschek and
    Dieter Lasser, A. K. Peters Ltd, 1993.

6
?????? ??????? ??????
  • ?????? ????? ????? 5 ??????? (???? ??????),
    ??????? ?? ??? ????? ?? ???????.
  • ????? ????? ????? ???? ????? ?????.
  • ???? ???????? 50 ?????? ?????, ???? ??????
    ????? 50 ?????? ?????.
  • ??? ????? ?? ????? ?? ???? ???? 55 ????? ??????
    ?????, ????? 65 ????? ?????? ???????? ???????
    (??? ?????? ?????).

7
?????? ??????? ?????? (????)
  • ?? ????? ???? ????? ????? ???? ???? ????/???????
    ????? ????? ????? ?????.
  • ????? ?? ????? ?? ????? ??? ???? ???? ???? ?????
    ??????.
  • ???? ???????, ????? ????? ?????? ????????, ?????
    ?????? ???? ?????, ???? ??????? ????? ?????
    ????????.

8
?????
????? Matlab ?????
9
?????? ????? ????
?????? ???????, ??????, ?????, ??? ?????
?????, ????????, ??????, ?????? ????????
???????, ?????? ??????? ????? ????? ?????
???????? ??????
10
????, ??????? ?????? (?? ???????)
?????? ??????? ????????? ????? ?????? ????
????????
11
????? ????? ????? ???? (??????)
(??????? ?? PTC )
???????
??????
???
?????
???????
12
????? ????? ????? ???? (??????)
(??????? ?? PTC )
????? ??????
??????
????????
?????
13
????? ????? ????? ???? (?????)
(??????? ?? PTC )
??????
???????
??????????
14
??? ????? ?????
????? ?? ????? ???-??????? ????? ????? ????
????? ???? ???? ????? ????? ?????? ?? ?????
??????? ???? ???? ???? ?????? ????? ??
???? ???? ?? ??????? ???????
????? ?????? ????????? ?? ???? (?????, ?????
????? ???) ????? B-Rep, CSG, Octrees
????? ????? ?????? ????????? ?? ?????
??????? ????? ????? ????? ????? ?????? ?????
(CNC)
15
????? ??? ????? ????? ???? - 1
(???? I-DEAS tutorials)
16
(???? I-DEAS tutorials)
3. ????? ????-???? (extrude)
1. ???? ??-?????
2. ????? ??? ?? ????
4. ????? (?????) ?????
5. ????? (fillet) ??????
6. ????? (fillet) ??????
17
????? ??? ????? ????? ???? - 2
(???? I-DEAS tutorials)
????? ???? ??????
18
(???? I-DEAS tutorials)
1. ???? ?? ???? ?????
2. ????? extrude ?? ????
3. ????? (extrude) ???? ?????? ?? ???
4. ????? (revolve) ????
5. ????? (revolve) ??? ????
19
????? ??? ????? ????? ???? 3 freeform surface
  • http//en.wikipedia.org/wiki/Freeform_surface_mode
    lling

20
????? ??? ????? ????? ???? - 4??????? ???????
(???? Piegl and Tiller)
????? ???? ????? ?????? ????? (surface fitting)
????? ???? ????? ?????? (skinned surface)
21
????? ????? ?????? ???????
(???? Farin)
????? ???? ???? ??????/????
?????? ???????
22
????? ?????
  • ???? ???????? ??????? ??????? ????? ?? ??????
    ????. ???? ??????, ????? ???????????, ???? ????
    ????????.
  • ????? ????? ????? ?? ???? ????? ???????? ??.

23
???? ??? ?????? ??????? ??????? ??????
????
????? ????????
?????? ???????
????????? ?? ?????? ???????
????? ??????? ?????? ?????
????????
24
??????? ???? ????? ????"?
25
????? ????? ???????? ?? ???? ?????????? ????
????? ?????
Top arc
Top fillet
Evolvent
Straight line
Bottom fillet
Bottom arc
26
????? ???? ?? ??? ???????? ??????? ????? ?????
27
????? ??????????? ?????, ????? ?????, ????? ?????
????? ???????
????? ???? ?????????
28
?????? ?????? ???? ??? ???????
29
?. ????? ?????
30
?. ????? ????
??? ???? ??????
????? ???????? ??????
???? ??? ??????? ??????
??? ???????? ??????
?????
??? ???????? ??????? ?????
31
?. ????? ????
32
?. ????? ????
33
????? ?????? ???? ????
????? ????
?????
?????
34
????? ??????
????? ??? ??????
35
????? ?? ??????????? ????
???? ??????
???? ??????
36
????? ???? ?????? ?? ?????? ????? ???? ???
??? 2500 ?????? (50 ????? ?????)
????? ?????? ?????? ??????
???? ?????? 13X12 ?????? ????
????? ???????? 0.536 ?"? (??????? ?????? ??????)
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