1

U.A.V AradCatia Machining CAD CAM1

CUPRINS

1CUPRINS

21.PROCESUL TEHNOLOGIC DE PRELUCRARE PE FREZ CU COMAND NUMERIC CONSTRUIT

21.1.Noiuni introductive

32.PROIECTAREA DE TIP CAD A UNUI REPER

32.1.Realizarea reperului de tip CAD

262.2.Program generat de Catia V5 Platforma MACHINING

54BIBLIOGRAFIE

1. PROCESUL TEHNOLOGIC DE PRELUCRARE PE FREZ CU COMAND NUMERIC CONSTRUIT

1.1. Noiuni introductive

Fig. 1. Proiectarea i planificarea procesului de prelucrare.CAD ( Computer aided Design) tradus ca i proiectarea asistat de calculator, este o program unealt ingineresc care este destinat desenrii tehnice n proiectare. n programele de tip CAD se pot realiza desene n doua dimensiuni (2D) i n trei dimensiuni (3D).

CAM (Computer aided Manufacturing) este un program destinat planificrii i controlului mainilor unelte cu comand numeric. n acest proces de prelucrare, programul de tip CAM are rolul de a transforma desenul (2D) mpreuna cu setarile aferente, n cod program (G code).

G CODE este un limbaj de programare pentru MUCN .PROGRAM DE COMAND Interpeteaz codul program i comand maina unealt. 2. PROIECTAREA DE TIP CAD A UNUI REPER

CATIA (Computer Aided Three Dimensional Interactive Application)este o suit software comercial multiplatformCAD/CAM/CAEdezvoltat de compania francezDassault Systemesi comercializat n ntrega lume deIBM. Scris nlimbajul de programareC++, CATIA este temelia suitei software a Dassault Systemes.

Software-ul a fost creat dup 1970 i nainte de 1980 s ajute la dezvoltarea avionului de lupt cu reacieMirage, apoi a fost adoptat n industria aerospaial, auto, construcia de ambarcaiuni, i multe alte industrii.2.1. Realizarea reperului de tip CAD

START MECHANICAL DESIGN PART DESIGN

Denumim fisierul Desen UAV

Cream un dreptungi incadrad simetric pe axele X, Y, cu valorile din imagine

Folosim functia PAD si facem un cub cu o inaltime de 40mm

Folosim functia Sketch pe fata superiara a cubului si cream un dreptungi incadrat simetric pe axele X si Y, cu dimensiunile afisate in imagine.

Folosim functia PAD si facem un cub cu o inaltime de 15

Folosim Edge Fillet, selectam toate cele 4 muchii ale cubului din paretea superioara pentru a obtine raza specificata de noi (R5).

Folosim functia Sketch pe fata superiara a cubului si cream doua dreptunghiuri incadrate simetric pe axele X si Y cu dimensiunile afisate in imagine.

Folosim functia Pocket si realizam un buzunar dupa forma creata mai sus cu u adancime de 15mm.

Folosim Edge Fillet, selectam toate cele 6 muchii ale buzunarului creat mai sus pentru a obtine raza specificata de noi (R2).

Folosim functia Hole pentru a face o gaura pe fata superioara a piesei cu o adancime de 30mm si un diametru de 10mm.

Gaura este pozitionata pe axa X si dimensionata cu 20mm fata de marginea superiara stanga a cubului cu dimensiunile date in imagine

Piesa finita este gata. Acum trebuie sa cream un nou corp, corp care ar reprezenta materialul brut din care piesa este realizata. INSERT - BODY

Ai denumim corpurile ca in imaginea de mai jos. Selectam corpul Material brut si folosim functia Sketch pe fata superiara a piesei.

Acum trebuie sa proiectam fata inferiara a piesei. Dupa ce urmam pasii din imagine, trebuie sa selectam fata inferiara a cubului si vom obtine un dreptungi galben.

Folosim functia PAD si cream un cub cu inaltimea de 55mm, ceea ce ar acoperii toata piesa noastra.

CLICK DREAPTA PROPRIETIES GRAPHICS COLOR (red) TRANSPARENCY (18)

ANSAMBLU Material brut Material finit

Acum trebuie sa mergem in SURFACE MACHINING, urmand pasii de mai jos, pentru

a crea procesul de prelucrare.

Apasam dublu click stanga pe default reference si ne selectam coltul de sus stanga a piesei , pentru a crea originea piesei (X0,Y0,Z0)

Apasam iconita Roughing si o sa obtinem iconita din imagine. Selectam Rough stock din pictograma iar apoi selectam body-ul Material brut. Tot din pictograma selectam Part iar in acelasi fel selectam body-ul Produs finit.

Dupa aceasta operatie, o sa vedeti straturile din pictograme inverzite.

Selectati Tab 1 din fereastra. Aici puteti seta optiuni de frezare in piesa.

In aceasta categorie alegeti la Tool path style: Spiral si la Coutting mode: Conventional.

Selectati Tab 3 din fereastra. Aici alegem dimensiuni ale frezei. Pentru aceasta operatie cream o freza cu diametru de 20mm. Aceasta este o operatie de degrosare.

Dupa ce a-ti facut acest pas, selectati pictograma din dreapta jos a ferestrei Tool Path Reply. De aici putem vizualiza o simulare pe piesa.

Mai jos vedeti o simulare a frezarii in piesa. Cu aceasta freza creata am realizat conturul exterior si buzunarul mare.

Urmatoarea operatie pe care o cream este Centruirea, operatie pe care o cream inainte de a crea gaura in piesa. In procesul tehnologic se foloseste inainte de a folosi burghiul, evitand alunecare burghiului.

Selectam Spot Drilling

In aceasta fereasta folosim aceleasi dimensiuni ca in imaginea de mai jos. Apasam pe textul no point iar apoi alegem gaura pe care dorim sa o centruim.

Urmatorul pas este sa alegem un centruitor cu diametru de 15mm cu raza de 45 de grade.

Inca o data putem vedea in simulare ambele operatii in ordinea lor.

Operatia 3 este cea de gaurire. Apasam pe iconita Drill.

In aceeasi ordine de lucru, alegem dimensiunile din imaginea de mai jos. Apasand pe no point, inca odata selectam gaura pe care dorim safacem gaurirea.

A 4-a scula creata este un burgiu cu diametru de 10mm si o lungime de corp de 50mm.

Si in aceasta simulare putem vedea penultima operatie creata.

Ultima operatie care o realizam este frezarea buzunarului mic. La fel ca la prima operatie, aici o sa folosim o freza cu diametru de 5mm.

Aceeasi pasi ca la prima operatie.

Aceeasi pasi ca la prima operatie.

La fel ca la prima operatie, aici o sa folosim o freza cu diametru de 5mm.

Aici putem observa simularea finala, piesa noastra este gata. Tot ce trebuie sa facem este sa ne alegem masina pe care dorim sa obtinem codul program si cateva setari pecifice de program.

TOOLS OPTION

MACHINING - GENERAL Aici selectam IMS

Urmatoarea operatie pentru a obtine codul masina.

Am decis sa alegem ca programul nostru sa fie destinat pe o platforma de sinumerik 840.

Alegem unde dorim sa salvam programul, apoi apasam pe butonul EXECUTE. Programul nostru este gata, mergem in directorul unde am salvat fisierul si putem vedea codul program.

2.2. Program generat de Catia V5 Platforma MACHINING

PROGRAM UAVN1 G54 G64 G40 G90 G17 G94 G49 G80

N2 M8

N3 G53Freza deget ebosare D10

N4 T1 M6

N5 G0 X-13.1 S70 M3

N6 Z5.

N7 G1 Z-5. F300.

N8 X0

N9 X230. F1000.

N10 Y110.

N11 X0

N12 Y20.019

N13 X4.

N14 X4.001 Y20.007

N15 Y19.916

N16 X4.407 Y16.632

N17 X5.196 Y13.977

N18 X6.56 Y11.391

N19 X8.895 Y8.573

N20 X10.128 Y7.457

N21 X13.167 Y5.602

N22 X13.372 Y5.519

N23 X13.849 Y5.234

N24 X14.398 Y5.103

N25 X15.014 Y4.854

N26 X18.711 Y4.076

N27 X19.886 Y4.002

N28 X210.199 Y4.003

N29 X213.893 Y4.563

N30 X217.187 Y5.731

N31 X220.151 Y7.698

N32 X222.468 Y10.024

N33 X224.273 Y12.884

N34 X225.247 Y15.222

N35 X225.956 Y19.062

N36 X226. Y20.08

N37 X225.999 Y90.085

N38 X225.592 Y93.369

N39 X224.275 Y97.177

N40 X222.343 Y100.105

N41 X219.869 Y102.545

N42 X217.697 Y103.987

N43 X215.113 Y105.117

N44 X212.191 Y105.813

N45 X210.118 Y105.998

N46 X20.222 Y106.

N47 X20.192 Y105.997

N48 X19.805

N49 X18.743 Y105.836

N50 X16.688 Y105.608

N51 X13.976 Y104.815

N52 X11.429 Y103.469

N53 X9.189 Y101.741

N54 X7.533 Y99.977

N55 X5.727 Y97.117

N56 X4.922 Y95.253

N57 X4.878 Y95.08

N58 X4.753 Y94.779

N59 X4.626 Y94.089

N60 X4.23 Y92.539

N61 X4.131 Y91.407

N62 X4.044 Y90.939

N63 X4. Y89.921

N64 Y20.019

N65 X0

N66 Y0

N67 Z5.

N68 G0 X-13.1

N69 Z0

N70 G1 Z-10. F300.

N71 X0

N72 X230. F1000.

N73 Y110.

N74 X0

N75 Y20.019

N76 X4.

N77 X4.001 Y20.007

N78 Y19.916

N79 X4.407 Y16.632

N80 X5.196 Y13.977

N81 X6.56 Y11.391

N82 X8.895 Y8.573

N83 X10.128 Y7.457

N84 X13.167 Y5.602

N85 X13.372 Y5.519

N86 X13.849 Y5.234

N87 X14.398 Y5.103

N88 X15.014 Y4.854

N89 X18.711 Y4.076

N90 X19.886 Y4.002

N91 X210.199 Y4.003

N92 X213.893 Y4.563

N93 X217.187 Y5.731

N94 X220.151 Y7.698

N95 X222.468 Y10.024

N96 X224.273 Y12.884

N97 X225.247 Y15.222

N98 X225.956 Y19.062

N99 X226. Y20.08

N100 X225.999 Y90.085

N101 X225.592 Y93.369

N102 X224.275 Y97.177

N103 X222.343 Y100.105

N104 X219.869 Y102.545

N105 X217.697 Y103.987

N106 X215.113 Y105.117

N107 X212.191 Y105.813

N108 X210.118 Y105.998

N109 X20.222 Y106.

N110 X20.192 Y105.997

N111 X19.805

N112 X18.743 Y105.836

N113 X16.688 Y105.608

N114 X13.976 Y104.815

N115 X11.429 Y103.469

N116 X9.189 Y101.741

N117 X7.533 Y99.977

N118 X5.727 Y97.117

N119 X4.922 Y95.253

N120 X4.878 Y95.08

N121 X4.753 Y94.779

N122 X4.626 Y94.089

N123 X4.23 Y92.539

N124 X4.131 Y91.407

N125 X4.044 Y90.939

N126 X4. Y89.921

N127 Y20.019

N128 X0

N129 Y0

N130 Z0

N131 G0 Z10.1

N132 X156.967 Y56.

N133 G1 Z.1 F300.

N134 X176. Z-5.

N135 Y54. F1000.

N136 X144.

N137 Y56.

N138 X176.

N139 X185.

N140 Y45.

N141 X135.

N142 Y65.

N143 X185.

N144 Y56.

N145 X194.

N146 Y36.029

N147 X193.688 Y36.

N148 X126.364

N149 X126. Y36.087

N150 Y73.916

N151 X126.081 Y74.

N152 X193.836

N153 X194. Y73.961

N154 Y56.

N155 Z5.

N156 G0 Z5.1

N157 X156.967

N158 G1 Z-4.9 F300.

N159 X176. Z-10.

N160 Y54. F1000.

N161 X144.

N162 Y56.

N163 X176.

N164 X185.

N165 Y45.

N166 X135.

N167 Y65.

N168 X185.

N169 Y56.

N170 X194.

N171 Y36.029

N172 X193.688 Y36.

N173 X126.364

N174 X126. Y36.087

N175 Y73.916

N176 X126.081 Y74.

N177 X193.836

N178 X194. Y73.961

N179 Y56.

N180 Z0CENTRUITOR D15

N181 G53

N182 T2 M6

N183 G0 X45. Y55. S70 M3

N184 Z1.

N185 Z4.

N186 CYCLE81 ( 4. , 0 , 4. , -4. )

N187 G53BURGHIU D10

N188 T3 M6

N189 Z1. S70 M3

N190 CYCLE81 ( 1. , 0 , 1. , -30. )

N191 G53FREZA D5

N192 T4 M6

N193 X-5.6 Y95.969 S70 M3

N194 Z5.

N195 G1 Z-5. F300.

N196 X0

N197 Y0 F1000.

N198 X230.

N199 Y110.

N200 X0

N201 Y95.969

N202 X2.25

N203 Y2.25

N204 X227.75

N205 Y107.75

N206 X2.25

N207 Y95.969

N208 X4.5

N209 Y4.5

N210 X225.5

N211 Y105.5

N212 X4.5

N213 Y95.969

N214 X6.75

N215 Y6.75

N216 X223.25

N217 Y103.25

N218 X6.75

N219 Y95.969

N220 X9.

N221 Y13.964

N222 Y9.

N223 X13.966

N224 Y11.25

N225 X12.489 Y12.488

N226 X11.25 Y13.964

N227 Y11.25

N228 X13.966

N229 Y9.

N230 X216.087

N231 X221.

N232 Y13.926

N233 X218.75

N234 X217.554 Y12.453

N235 X216.087 Y11.25

N236 X218.75

N237 Y13.926

N238 X221.

N239 Y96.086

N240 Y101.

N241 X216.117

N242 Y98.75

N243 X217.566 Y97.549

N244 X218.75 Y96.086

N245 Y98.75

N246 X216.117

N247 Y101.

N248 X13.982

N249 X9.

N250 Y95.969

N251 X11.25

N252 X12.496 Y97.477

N253 X13.982 Y98.75

N254 X15.243 Y96.978

N255 X14.937 Y96.707

N256 X14.345 Y96.298

N257 X13.945 Y95.832

N258 X13.529 Y95.464

N259 X13.238 Y95.007

N260 X12.808 Y94.505

N261 X12.531 Y93.896

N262 X12.393 Y93.679

N263 X12.266 Y93.311

N264 X11.924 Y92.557

N265 X11.85 Y92.11

N266 X11.67 Y91.59

N267 X11.5 Y89.985

N268 Y20.083

N269 X11.502 Y20.07

N270 Y19.979

N271 X11.793 Y18.359

N272 X11.956 Y17.404

N273 X11.97 Y17.373

N274 X11.984 Y17.295

N275 X12.939 Y15.32

N276 X14.225 Y13.78

N277 X15.355 Y12.894

N278 X16.815 Y12.135

N279 X17.55 Y11.96

N280 X18.099 Y11.726

N281 X18.847 Y11.651

N282 X19.151 Y11.578

N283 X20.343 Y11.5

N284 X209.799

N285 X212.616 Y11.96

N286 X214.639 Y12.917

N287 X216.123 Y14.106

N288 X217.616 Y16.32

N289 X218.273 Y18.116

N290 X218.5 Y20.016

N291 X218.498 Y90.022

N292 X218.015 Y92.706

N293 X217.06 Y94.681

N294 X215.511 Y96.387

N295 X214.643 Y97.107

N296 X213.182 Y97.867

N297 X211.905 Y98.274

N298 X210.102 Y98.498

N299 X20.205 Y98.5

N300 X17.386 Y98.041

N301 X15.892 Y97.368

N302 X15.735 Y97.26

N303 X15.363 Y97.083

N304 X15.243 Y96.978

N305 X13.982 Y98.75

N306 X11.25

N307 Y95.969

N308 Z5.

N309 G0 X-5.6 Y96.035

N310 Z0

N311 G1 Z-10. F300.

N312 X0

N313 Y0 F1000.

N314 X230.

N315 Y110.

N316 X0

N317 Y96.035

N318 X2.25

N319 Y2.25

N320 X227.75

N321 Y107.75

N322 X2.25

N323 Y96.035

N324 X4.5

N325 Y4.5

N326 X225.5

N327 Y105.5

N328 X4.5

N329 Y96.035

N330 X6.75

N331 Y6.75

N332 X223.25

N333 Y103.25

N334 X6.75

N335 Y96.035

N336 X9.

N337 Y13.964

N338 Y9.

N339 X13.966

N340 Y11.25

N341 X12.489 Y12.488

N342 X11.25 Y13.964

N343 Y11.25

N344 X13.966

N345 Y9.

N346 X216.087

N347 X221.

N348 Y13.926

N349 X218.75

N350 X217.554 Y12.453

N351 X216.087 Y11.25

N352 X218.75

N353 Y13.926

N354 X221.

N355 Y96.086

N356 Y101.

N357 X216.117

N358 Y98.75

N359 X217.566 Y97.549

N360 X218.75 Y96.086

N361 Y98.75

N362 X216.117

N363 Y101.

N364 X13.904

N365 X9.

N366 Y96.035

N367 X11.25

N368 X12.462 Y97.505

N369 X13.904 Y98.75

N370 X15.208 Y96.947

N371 X14.937 Y96.707

N372 X14.345 Y96.298

N373 X13.945 Y95.832

N374 X13.529 Y95.464

N375 X13.238 Y95.007

N376 X12.808 Y94.505

N377 X12.531 Y93.896

N378 X12.393 Y93.679

N379 X12.266 Y93.311

N380 X11.924 Y92.557

N381 X11.85 Y92.11

N382 X11.67 Y91.59

N383 X11.5 Y89.985

N384 Y20.083

N385 X11.502 Y20.07

N386 Y19.979

N387 X11.793 Y18.359

N388 X11.956 Y17.404

N389 X11.97 Y17.373

N390 X11.984 Y17.295

N391 X12.939 Y15.32

N392 X14.225 Y13.78

N393 X15.355 Y12.894

N394 X16.815 Y12.135

N395 X17.55 Y11.96

N396 X18.099 Y11.726

N397 X18.847 Y11.651

N398 X19.151 Y11.578

N399 X20.343 Y11.5

N400 X209.799

N401 X212.616 Y11.96

N402 X214.639 Y12.917

N403 X216.123 Y14.106

N404 X217.616 Y16.32

N405 X218.273 Y18.116

N406 X218.5 Y20.016

N407 X218.498 Y90.022

N408 X218.015 Y92.706

N409 X217.06 Y94.681

N410 X215.511 Y96.387

N411 X214.643 Y97.107

N412 X213.182 Y97.867

N413 X211.905 Y98.274

N414 X210.102 Y98.498

N415 X20.205 Y98.5

N416 X17.386 Y98.041

N417 X15.892 Y97.368

N418 X15.735 Y97.26

N419 X15.363 Y97.083

N420 X15.208 Y96.947

N421 X13.904 Y98.75

N422 X11.25

N423 Y96.035

N424 Z0

N425 G0 Z10.1

N426 X44.266 Y56.168

N427 G1 Z.1 F300.

N428 X44.504 Y56.321 Z.024

N429 X44.938 Y56.424 Z-.095

N430 X45.63 Y56.259 Z-.286

N431 X46.295 Y55.586 Z-.539

N432 X46.44 Y54.935 Z-.718

N433 X46.015 Y54.008 Z-.991

N434 X45.152 Y53.597 Z-1.248

N435 X44.008 Y53.972 Z-1.57

N436 X43.682 Y54.461 Z-1.728

N437 X43.567 Y55.105 Z-1.903

N438 X43.922 Y55.946 Z-2.147

N439 X44.504 Y56.321 Z-2.333

N440 X44.938 Y56.424 Z-2.452

N441 X45.63 Y56.259 Z-2.643

N442 X46.295 Y55.586 Z-2.896

N443 X46.44 Y54.935 Z-3.075

N444 X46.015 Y54.008 Z-3.348

N445 X45.152 Y53.597 Z-3.605

N446 X44.008 Y53.972 Z-3.927

N447 X43.682 Y54.461 Z-4.085

N448 X43.567 Y55.105 Z-4.26

N449 X43.922 Y55.946 Z-4.504

N450 X44.504 Y56.321 Z-4.69

N451 X44.938 Y56.424 Z-4.809

N452 X45.63 Y56.259 Z-5.

N453 X46.295 Y55.586 F1000.

N454 X46.44 Y54.935

N455 X46.015 Y54.008

N456 X45.152 Y53.597

N457 X44.008 Y53.972

N458 X43.682 Y54.461

N459 X43.567 Y55.105

N460 X43.922 Y55.946

N461 X44.504 Y56.321

N462 X44.938 Y56.424

N463 X45.63 Y56.259

N464 Z5.

N465 G0 Z5.1

N466 X45.08 Y54.908

N467 G1 Z-4.9 F300.

N468 X44.266 Y56.168

N469 X44.504 Y56.321 Z-4.976

N470 X44.938 Y56.424 Z-5.095

N471 X45.63 Y56.259 Z-5.286

N472 X46.295 Y55.586 Z-5.539

N473 X46.44 Y54.935 Z-5.718

N474 X46.015 Y54.008 Z-5.991

N475 X45.152 Y53.597 Z-6.248

N476 X44.008 Y53.972 Z-6.57

N477 X43.682 Y54.461 Z-6.728

N478 X43.567 Y55.105 Z-6.903

N479 X43.922 Y55.946 Z-7.147

N480 X44.504 Y56.321 Z-7.333

N481 X44.938 Y56.424 Z-7.452

N482 X45.63 Y56.259 Z-7.643

N483 X46.295 Y55.586 Z-7.896

N484 X46.44 Y54.935 Z-8.075

N485 X46.015 Y54.008 Z-8.348

N486 X45.152 Y53.597 Z-8.605

N487 X44.008 Y53.972 Z-8.927

N488 X43.682 Y54.461 Z-9.085

N489 X43.567 Y55.105 Z-9.26

N490 X43.922 Y55.946 Z-9.504

N491 X44.504 Y56.321 Z-9.69

N492 X44.938 Y56.424 Z-9.809

N493 X45.63 Y56.259 Z-10.

N494 X46.295 Y55.586 F1000.

N495 X46.44 Y54.935

N496 X46.015 Y54.008

N497 X45.152 Y53.597

N498 X44.008 Y53.972

N499 X43.682 Y54.461

N500 X43.567 Y55.105

N501 X43.922 Y55.946

N502 X44.504 Y56.321

N503 X44.938 Y56.424

N504 X45.63 Y56.259

N505 Z0

N506 G0 Z.1

N507 X45.08 Y54.908

N508 G1 Z-9.9 F300.

N509 X44.266 Y56.168

N510 X44.504 Y56.321 Z-9.976

N511 X44.938 Y56.424 Z-10.095

N512 X45.63 Y56.259 Z-10.286

N513 X46.295 Y55.586 Z-10.539

N514 X46.44 Y54.935 Z-10.718

N515 X46.015 Y54.008 Z-10.991

N516 X45.152 Y53.597 Z-11.248

N517 X44.008 Y53.972 Z-11.57

N518 X43.682 Y54.461 Z-11.728

N519 X43.567 Y55.105 Z-11.903

N520 X43.922 Y55.946 Z-12.147

N521 X44.504 Y56.321 Z-12.333

N522 X44.938 Y56.424 Z-12.452

N523 X45.63 Y56.259 Z-12.643

N524 X46.295 Y55.586 Z-12.896

N525 X46.44 Y54.935 Z-13.075

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N531 X43.922 Y55.946 Z-14.504

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N533 X44.938 Y56.424 Z-14.809

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N538 X45.152 Y53.597

N539 X44.008 Y53.972

N540 X43.682 Y54.461

N541 X43.567 Y55.105

N542 X43.922 Y55.946

N543 X44.504 Y56.321

N544 X44.938 Y56.424

N545 X45.63 Y56.259

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N548 X45.08 Y54.908

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N554 X45.63 Y56.259 Z-15.286

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N559 X44.008 Y53.972 Z-16.57

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N581 X44.008 Y53.972

N582 X43.682 Y54.461

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N645 X91.5 Y81.415

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N647 G0 Z5.1

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N650 X88.5

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N654 X91.5 Y81.415 Z-10.

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N656 X91.39 Y28.5

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N658 X88.5 Y28.572

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N660 X88.552 Y81.5

N661 X91.142

N662 X91.5 Y81.415

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N664 G0 Z10.1

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N669 X143.25

N670 Y56.75

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N672 X179.

N673 Y51.

N674 X141.

N675 Y59.

N676 X179.

N677 Y56.75

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N810 Y56.75

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N821 Z0

N822 M5

N823 M30

N824 M2

N825 M30

BIBLIOGRAFIE

1. http://ro.wikipedia.org/ - CAD - CAM2. http://ro.wikipedia.org/ - Catia V5