B CNG THNG TRNG I HC CNG NGHIP TP. H CH MINH KHOA C KH TIU LUN

tai:

GVHD: TS. NGUYN DN Sinh vin thc hin: L CAO DN CDCK8A INH QUC ANH

NI DUNG

GII THIU GIA CNG HA GIA CNG QUANG HA MT S THIT B GIA CNG QUANG HA

GII THIUCC PHNG PHP GIA CNG HA1. nh ngha:

Phng php gia cng ha l phng php gia cng khng truyn thng, trong vt liu c tch ra khi tip xc trc tip vi cc cht khc ha mnh to ra hnh dng trn vt liu nh tc dng ca axit mnh hay cht kim,ly phn ct b i trn chi tit gia cng to ra 1 chi tit chnh xc.

GII THIUCC PHNG PHP GIA CNG HA2. Yu cu thc t:

c ng dng t sau chin tranh th gii th II. Cc phng php gia cng bng ha hc c s dng trong trng hp khng th ct gt kim loi bng my cng c thng thng do vt liu c cng cao, dn, c hnh dng, kch thc phc tp.

GII THIUCC PHNG PHP GIA CNG HA3. Phn loi: Cc phng php gia cng ha chia lm 4 loi:GIA CNG HA

PHAY HA

TO PHI HA

KHC HA

GIA CNG QUANG HA

GIA CNG QUANG HANH NGHA

Gia cng quang ha (Photochemical Machining PCM) l phng php gia cng ha m trong phng php khng quang to lp ph c s dng gia cng kim loi khi i hi dung sai khc khe hay mu phc tp trn nhng chi tit phng.

GIA CNG QUANG HATrnh t cc bc gia cng quang ha1)

2) 3) 4) 5) 6) 7) 8)

Lam sch phi: Bc u tin l nguyn cng lm sch chi tit m bo cho vt liu c bc i ng u t b mt gia cng To lp bo v bng phng php sn t m bn ln trn lp bo v Phi ra nh sng cc tm Bc lp bo v ti nhng vng c khc axit Khc ha 1 phn Khc ha toan phn Bc lp bo v va lam sch sn phm

GIA CNG QUANG HANH NGHA

Gia cng quang ha (Photochemical Machining PCM) l phng php gia cng ha m trong phng php khng quang to lp ph c s dng gia cng kim loi khi i hi dung sai khc khe hay mu phc tp trn nhng chi tit phng.

nh sng cc tm

(CHA XONG)

GIA CNG QUANG HANhng yu cu cn thit trc khi gia cng quang ha Bn v c y kch thc v dung sai Cc tnh cht ca vt liu c s dng S lng v yu cu k thut khc ca chi tit

GIA CNG QUANG HAHai bc quan trng trong gia cng quang ha la to lp bo v va khc ha 1)Lp bo v: Thng l neoprene, polivinil, polyethylen v cc polymer khc. Lp bo v c thc hin bng phng php khng quang. Phng php khng quang: s dng cc k thut chp nh to lp bo v. Cc vt liu ca lp bo v ny c cha nhng cht cm quang. Chng c ph ln b mt ca chi tit v tip nhn nh sng qua 1 m bn ca cc vng c khc ha. Sau ngi ta dng k thut ra nh bc i cc vng ny ca lp bo v. Qu trnh ny s li lp bo v trn b mt chi tit cn c bo v v nhng vng cn li ca chi tit khng c bo v s b khc ha.

GIA CNG QUANG HAHai bc quan trng trong gia cng quang ha la to lp bo v va khc ha 2. Khc ha : L bc bc vt liu. Khi chi tit c nhng chm trong dung dch khc ha, nhng phn ca chi tit khng c lp bo v s b tc ng ha hc. Phng php n mn thng dng l bin vt liu gia cng thnh mui ha tan trong dung dch khc ha v do vt liu c bc i khi b mt. Sau khi 1 khi lng vt liu mong mun c bc i, chi tit c ly ra khi dung dch khc ha v c ra sch.

GIA CNG QUANG HAHai bc quan trng trong gia cng quang ha la to lp bo v va khc ha * Mt s lu khi khc ha :S la chn cht khc ha ph thuc vo vt liu ca chi tit gia cng,chiu su mong mun v tc bc vt liu, cc yu cu v nhm b mt. Cc cht khc ha cng phi ph hp vi loi cht bo v m bo rng vt liu ca lp bo v khng b tc ng ha hc ca cht khc ha. Tc bc vt liu trong gia cng c biu th bng tc thm(mm/pht), tc thm khng b nh hng bi din tch b mt.

Cc vt liu thng thng va cc cht khc ha trong gia cngVt liu gia cng Nhm Hp kim nhm ng v hp kim ng Magnesium v cc hp kim Silicon Thp trung bnh Titanic Hp kim Titan Cht khc ha FeCl3 NaOH feca1 H2SO4 HNO3,HF,H2O HCL,HNO3 HF HNO3,HF Tc thm(mm/pht) 0,020 0,025 0,050 0,038 Rt chm 0,025 0,025 0,025 2,0 1,0 1,0 H s khc 1,75 1,75 2,75 1,0

GIA CNG QUANG HAMi quan h gia ng knh l gia cng va chiu day vt liu

Trong gia cng quang ha, ng knh l khng th nh hn b dy kim loi gia cng.Tuy nhin mi quan h ny s thay i khi chiu dy chi tit gia cng thay i. Bng 3.1: Mi quan h gia ng knh l gia cng v chiu dy vt liuChiu dy kim loi(mm) ng knh nh nht ca l gia cng (mm)

0,025 0,127 0,127

0,1016 110% chiu dy kim loi

Trong thc t gia cng ng knh l c th ln hn bng 3.1

Bng 3.2 : ng knh l gia cng thc tChiu dy kim loi (mm) 0,0254 0,127 0,1778 0,254 0,508 ng knh l thc t (mm) 0,1016 0,1524 0,2032 0,2928 0,6604 ng knh gii hn (mm) 0,0254 0,0381 0,0381 0,0508 0,0762

GIA CNG QUANG HAMi quan h gia chiu day vt liu vi khong cch gia 2 l.Bng 3.3 : Mi quan h gia chiu dy vt liu vi khong cch gia 2 l.

Chiu dy vt liu (mm) 0,127 0,127

Khong cch gia 2 l (mm) chiu dy 1,25 ln chiu dy

GIA CNG QUANG HANhng u im ca phng php gia cng quang ha

1. Gia cng quang ha khng cn s dng nhng dng c v khun truyn thng, gim chi ph cho dng c v khun. 2. C th gia cng nhng chi tit c hnh dng phc tp 3. D dng thay i mu m sn phm, rt l tng cho vic to mu. 4. Khng lm thay i tnh cht kim loi. 5. Khng to ng sut d. 6. B mt gia cng t chnh xc cao (10% b dy vt liu gia cng) 7. Ph hp vi nhiu kim loi: nhm, magie, hp kim ng, thp l xo, thp khng r, hp kim niken v.v...

GIA CNG QUANG HAPhm vi ng dng ca phng php gia cng quang ha Gia cng quang ha c s dng rng ri trong cng nghip in t sn xut cc mch phc tp trn nhng sn phm bn dn.To ra nhng mch tch hp qui m ln (VLSI) trong vi in t. 1 s sn phm ca gia cng quang ha: Mng chn EMI Pin lc Niken LaNo phng Cnh ta nhit Mt n quang hc Anten th chio nhn dng v tuyn(RFT)

Mt s sn phm gia cng quang ha

Mt s sn phm gia cng quang ha

Mt s thit b gia cng quang ha

Model 360 Etcher / RinseKhc c chi tit c chiu rng 360 mm v chiu di bt k Kch thc my : 812x600x500 (mm) S dng ng c 1 pha Gi bn: 11,500 $

Mt s thit b gia cng quang ha Rinse Etcher Model 635Khc c chi tit c chiu rng 610mm v chiu di bt k Kch thc my : 900x850x500 (mm) S dng ng c 1 pha Gi bn: 17,500 $

Mt s thit b gia cng quang ha 650 ProEtch SeriesKhc c chi tit c chiu rng 650mm v chiu di bt k Kch thc my : 1200x950x1270 (mm) S dng ng c 3 pha Gi bn: 18,500 $

Mt s thit b gia cng quang ha Rinse Etcher Model 635Khc c chi tit c chiu rng 610mm v chiu di bt k Kch thc my : 900x850x500 (mm) S dng ng c 1 pha Gi bn: 17,500 $

Mt s thit b gia cng quang ha Model 750 SeriesKhc c chi tit c chiu rng 750mm v chiu di bt k Kch thc my : 150x1200x1350 (mm) S dng ng c 3 pha Gi bn: 23,000 $

THANK YOU !