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C«ng nghÖ dËp nguéi
Ch ¬ng Ii
Söa tinh
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Ch¬ngIi.Söatinh
2.1.söatinhtheovongngoµi.2.1.1. Qu¸ tr×nh c¾t h×nh – söa
tinh.Qu¸tr×nhc¾th×nhsöatinhbaogåm:C¾tph«i,n¾nph«i,®Ætph«ivµokhu«n,c¾tgätsöatinh.
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Ch¬ngIi.Söatinh
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Ch¬ngIi.Söatinh
2.1.2. L îng d söa tinh.- Lîngd®Ósöatinh(y)®îclÊy®ång®Òugi÷akÝchthícnhánhÊtcñaph«ivµkÝchthíclínnhÊtcöas¶nphÈmsaukhisöatinh.
- Lîngd®Ósöatinhphôthuécvµo®ésailÖchvÒh×nhd¹ngcñaph«i,tr¹ngth¸imÆtc¾tvÇph¬ngph¸p®Ætph«ivµokhu«nsöatinh.(®îctratrongsætaydËpnguéi).
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Ch¬ngIi.Söatinh
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Ch¬ngIi.Söatinh
C¸ctrÞsè Khu«nc¾th×nh Khu«nsöatinhSöatinh1lÇn Söatinh
nhiÒulÇn
-KÝchthíccèi
-KÝchthícchµy-Lîngdsöatinh-L¬ngdtængcéng
Dc=D+y+Zmin
Dch=D+y
y(trab¶ng)
∆=Zmin+y
Dc=D+n.y+Zmin
y(trab¶ng)
∆=Zmin+y
Dc=Dmin
(D lµ kÝch th íc lín nhÊt cña s¶n phÈm sau khi söa tinh)
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Ch¬ngIi.Söatinh
2.1.3. Lùc söa tinh.-Lùcsöatinhnháh¬nsovíilùcc¾tkho¶ng(30–40)%,®îctÝnhtheoc«ngthøc.
Ps = ∆. L. c.(1 + c) (kg)
- §èivíikhu«ndËpcèicãv¸tmÐp. Ps = ∆. L. c. k (kg)
Trong®ã:∆ - lµlîngdtængcéng1phÝa
L-lµchuvis¶nphÈmc,k–lµhÖsèphôthuécvµovËtliÖucñaph«i.
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Ch¬ngIi.Söatinh
2.1.4.Khu«nsöatinhvßngngoµi.
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Ch¬ngIi.Söatinh
2.1.5.SöatinhmÆtngoµib»ngph¬ngph¸pÐp.
-Södông®èivíic¸cs¶nphÈmnhá,ph¼ng,h×nhd¸ngphøct¹p,cãchiÒudµytõ3–7mm
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Ch¬ngIi.Söatinh
- LùcÐp®îctÝnhtheoc«ngthøcP=q.F(kg)Trong®ã:-q–lµ¸psuÊtÐp§èivíithÐpmÒm,®ångq=35–45kg/mm2
§èivíithÐpcøngq=50–60kg/mm2
-F–lµdiÖntÝchcñaph«iÐp,mm2.
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- Lîngdtrªnmçinguyªnc«ngkh«ngvîtqu¸0.2mmvÒ1phÝa,mÆtc¾tvu«nggãcvíimÆt®Çu,kh«ngcãvÕtnøt,bavia.
- KÝchthícph«i®îctÝnhtheoc«ngthøc:Dp = D – 0.8∆ + Z + k (mm)
Trong®ã:D–lµkÝchthícdanhnghÜacñas¶nphÈm∆-DungsaitheokÝchthíccñas¶nphÈmZ–Khehëgi÷achµyvµcèi.k–lîngd®ÓÐp.K=0,2–0,4mm
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Ch¬ngIi.Söatinh
2.2.söatinhtheolç.Dïng®ÓchÕt¹olçchÝnhx¸ckhichiÒudµyvËtliÖu®Õn3,5mm.§échÝnhx¸c®¹t0.01–0.03mm,®énh¸m®¹tcÊp7–8.
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Ch¬ngIi.Söatinh
2.2.1. Qu¸ tr×nh söa tinh lç.
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Ch¬ngIi.Söatinh
2.2.2. L îng d ®Ó söa tinh lç.Lîngd®Ósöatinhlç®îcx¸c®Þnhtheoc«ngthøc.
y1 = a + b (mm)
y1lµlîngd®Ósöatinhlç
ahÖsèkÓ®Õn¶nhhëngcñaph¬ngph¸pgiac«nglçs¬bé.
blµhÖsèkÓ®Õnc¸chchänchuÈnkhisöatinh.
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2.2.3. Lùc söa tinh lç.Lùcsöatinhlç®îcx¸c®Þnhtheoc«ngthøc.
c-lµhÖsèphôthuécvµovËtliÖu
)1.(..2
cLyZ
P cs
(kg)
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Ch¬ngIi.Söatinh
2.2.4. KÝch th íc chµy söa tinh lç.KÝchthíccñachµysöatinhlç®îcx¸c®Þnhtheoc«ngthøc;
dch = (d + ∆) + i mm
d–lµkÝchthícnhánhÊtcñalçsaukhisöatinh.
∆-DungsaichÕt¹olç(dungsaitrªn)i–lµl¬ngcocñalç,mm§èivíi®ångthaui=0.005–0.01mmthÐpmÒmi=0.008–0.015mm
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2.2.5. Söa tinh lç kh«ng phoi.
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