Catia V5 - Proiectare de produs - cdn4. V5 - Proiectare de produs...  II.2 Procesul general...

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Transcript of Catia V5 - Proiectare de produs - cdn4. V5 - Proiectare de produs...  II.2 Procesul general...

  • Cuprins

    Cuprins _________________________________________________________________ 3

    Prefa _________________________________________________________________ 7

    I. Introducere __________________________________________________________ 9

    II. Utilizarea suprafeelor ______________________________________________ 15

    II.1 Modulul Generative Shape Design (GSD) ___________________________________ 15

    II.2 Procesul general n Generative Shape Design ________________________________ 20

    II.3 Utilizarea operaiilor (features) i a seturilor geometrice (Geometrical Set) _______ 21 II.3.1 Unelte pentru managementul Geometrical Set (GS) _________________________________ 21 II.3.2 Folosirea Ordered Geometrical Set ______________________________________________ 23 II.3.3 Scanarea unui Geometrical Set _________________________________________________ 23 II.3.4 Comparaie ntre Geometrical Set (GS) si Ordered Geometrical Set (OGS)________________ 23 II.3.5 Body-uri hibride si non-hibride __________________________________________________ 25

    II.4 Operaii de generare a elementelor tridimensionale __________________________ 25 II.4.1 Elemente de referin _________________________________________________________ 25 II.4.2 Sistemul de coordonate _______________________________________________________ 27 II.4.3 Operaii avansate pentru wireframe _____________________________________________ 28 II.4.4 Wireframe Analiz i eliminare erori ____________________________________________ 29 II.4.5 Crearea suprafeelor extrudate avansate (Swept Surfaces) ___________________________ 31 II.4.6 Crearea unei curbe Spine ______________________________________________________ 35 II.4.7 Crearea suprafetelor Sweep ____________________________________________________ 37 II.4.8 Crearea suprafetelor Adaptive Swept ____________________________________________ 49 II.4.9 Crearea suprafeelor tip Advanced Blending _______________________________________ 52 II.4.10 Crearea racordrilor cu ajutorul curbelor de sprijin i celor tip Spine _________________ 55 II.4.11 Crearea de racordri dup o lege de variaie ____________________________________ 56 II.4.12 Crearea suprafeelor de tip Blend _____________________________________________ 56 II.4.13 Analiza suprafeelor ________________________________________________________ 64

  • II.5 Metode de modelare suprafee ___________________________________________ 70 II.5.1 Boundary (prin definirea granielor) _____________________________________________ 70 II.5.2 Slab (prin definirea sub-suprafeelor componente) _________________________________ 71 II.5.3 Hybrid (Metoda hibrid) _______________________________________________________ 71 II.5.4 Conceptul Tolerant Modelling __________________________________________________ 72

    II.6 Aplicaii i exerciii propuse ______________________________________________ 74

    III. Metoda Top - Down Design __________________________________________ 81

    III.1 Prezentare general ____________________________________________________ 81

    III.2 Descrierea metodei ____________________________________________________ 82

    III.3 Comparaie cu modelarea standard _______________________________________ 86

    IV. Elemente de cinematic _____________________________________________ 89

    IV.1 Modulul DMU Kinematics. Prezentare _____________________________________ 89 IV.1.1 Principalele bare de comenzi _________________________________________________ 90 IV.1.2 Baza comenzi (Kinematics Toolbar) care este situat n dreapta ecranului conine: _____ 90 IV.1.3 Comenzile pentru animaie (DMU Generic Animation - n dreapta ecranului) conin: ____ 92 IV.1.4 Comenzile pentru analiza spaial conin (n dreapta ecranului): ____________________ 92

    IV.2 Crearea cuplelor _______________________________________________________ 94

    IV.3 Rularea simulrilor ____________________________________________________ 112

    IV.4 nregistrarea poziiilor _________________________________________________ 115

    IV.5 Secvenierea unui mecanism cu legi ______________________________________ 117

    IV.6 Definierea unui volum baleiat (Swept) ____________________________________ 119

    IV.7 Simularea cu legi _____________________________________________________ 122 IV.7.1 Definirea unei legi ________________________________________________________ 122 IV.7.2 Definirea unei legi folosind o curb importat __________________________________ 125 IV.7.3 Asocierea unei curbe cu o lege cinematic _____________________________________ 127

    IV.8 Actualizarea unui mecanism ____________________________________________ 128

    IV.9 Traiectoriile unui mecanism ____________________________________________ 130

    IV.10 Analiza mecanismelor _______________________________________________ 132

    IV.11 Studiul cinematic n Sketcher _________________________________________ 133 IV.11.1 Mod de lucru ____________________________________________________________ 133 IV.11.2 Aplicaie pentru studiul cinematic plan ________________________________________ 137

    V. Analiza ergonomic _______________________________________________ 141

  • V.1 Generaliti __________________________________________________________ 141

    V.2 Generarea i manipularea manechinului __________________________________ 142

    V.3 Verificarea ergonomiei spaiului de lucru __________________________________ 144

    VI. Metodologie de lucru pentru repere tehnologice ________________________ 147

    VI.1 Recomandri generale _________________________________________________ 147 VI.1.1 Recomandri privind mediul de lucru _________________________________________ 147 VI.1.2 Recomandri privind modelarea 3D __________________________________________ 149

    VI.2 Repere uzinate _______________________________________________________ 152 VI.2.1 Reguli de modelare _______________________________________________________ 152 VI.2.2 Aplicaii _________________________________________________________________ 154 VI.2.3 Exerciii propuse __________________________________________________________ 162

    VI.3 Repere din tabl ______________________________________________________ 163 VI.3.1 Modulul Generative Sheetmetal Design (GSD) __________________________________ 164 VI.3.2 Metode de lucru __________________________________________________________ 168 VI.3.3 Aplicaii _________________________________________________________________ 177 VI.3.4 Exerciii propuse __________________________________________________________ 190

    VI.4 Subansamble sudate __________________________________________________ 191 VI.4.1 Reguli de modelare _______________________________________________________ 191 VI.4.2 Aplicaii _________________________________________________________________ 192 VI.4.3 Exerciii propuse __________________________________________________________ 199

    VI.5 Repere din materiale compozite _________________________________________ 201 VI.5.1 Reguli de modelare _______________________________________________________ 202 VI.5.2 Aplicaii _________________________________________________________________ 203 VI.5.3 Exerciii propuse __________________________________________________________ 208

    VI.6 Repere din plastic _____________________________________________________ 210 VI.6.1 Modelarea suprafeei de referin ___________________________________________ 210 VI.6.2 Construcia nervurilor _____________________________________________________ 213 VI.6.3 Metode de fixare cu alte piese din plastic _____________________________________ 226 VI.6.4 Construcia geometriilor pentru bacuri mobile i eliminatori ______________________ 233 VI.6.5 Analiza final a piesei pentru matrierie _______________________________________ 236 VI.6.6 Aplicaii _________________________________________________________________ 238 VI.6.7 Exerciii propuse __________________________________________________________ 243

    VI.7 Repere realizate prin fabricaie aditiv ____________________________________ 247 VI.7.1 Tehnici de modelare geometrii exterioare _____________________________________ 251 VI.7.2 Tehnici de modelare geometrii interioare _____________________________________ 255 VI.7.3 Aplicaii _________________________________________________________________ 263 VI.7.4 Exerciii propuse __________________________________________________________ 266

  • VI.8 Recomandri privind realizarea ansamblelor _______________________________ 268 VI.8.1 Setri initiale _____________________________________________________________ 268 VI.8.2 Crearea arborelui de operaii _______________________________________________ 269 VI.8.3 Constrngerea i manipularea componentelor _________________________________ 271 VI.8.4 Verificarea i salvarea ansamblului ___________________________________________ 272

    VII. Pregtirea modelelor pentru metoda analizei cu elemente finite ___________ 275

    VII.1 Introducere _______________________________________________________ 276

    VII.2 Elemente de metodologie ____________________________________________ 276 VII.2.1 Pregtirea modelelor discretizate cu elemente finite unidimensionale ______________ 278 VII.2.2 Pregtirea modelelor discretizate cu elemente finite bidimensionale _______________ 279 VII.2.3 Pregtirea modelelor discretizate cu elemente finite tridimensionale _______________ 282

    VII.3 Particulariti n discretizarea sudurilor _________________________________ 284

    VII.4 Aplicaii___________________________________________________________ 286

    VII.5 Exerciii propuse ___________________________________________________ 294

    VII.6 Erori de discretizare _________________________________________________ 295

    Bibliografie ___________________________________________________________ 299

  • 64 Gabriel D. Dima, Marian N. Velea

    II.4.13 Analiza supraf