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MC LCPhn th hai: K THUT O LNG Chng : DNG C O THNG DNG TRONG CH TO C KH Chng 1: Thc cp 1.1 Cu to 1.2 Phn loi 1.3 Cch s dng 1.4 Mt s loi thc cp Chng 2: Panme 2.1 Cu to 2.2 Phn loi 2.3 Cch s dng 2.4 Mt s loi Panme 2.5 Cch bo qun Chng 3: ng h so 3.1 Cu to 3.2 Cng dng 3.3 Cch s dng 3.4 Mt s loi ng h so 3.5 Cch bo qun Chng 4: Cc thit b o khc 4.1 Cc my o chuyn v 4.2 Knh hin vi o lng 4.3 My o ta Ti liu tham kho
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DNG C O THNG DNG TRONG CH TO C KH
Chng 1: Thc cp
1.1 Cu to:
1.2 Phn loi: Thc cp 1/10: o c kch thc chnh xc n 0.1mm
Thc cp 1/20: o c kch thc chnh xc n 0.05mm
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Thc cp 1/50: o c kch thc chnh xc n 0.02mm
1.3 Cch s dng 1.3.1 Cch o: Trc khi o cn kim tra thc c chnh xc khng bng cch ko du xch v v tr 0 ban u. Kim tra b mt vt c sch khng. Khi o phi gi cho 2 mt phng ca thc
song song vi mt cn o. Mun ly thc ra khi v tr o th phi vn
ai c hm . 1.3.2 Cch c kt qu: Phn nguyn: khi o xem vch 0 trng vi vch no trn trc chnh th vch chia trn thc chnh bn tri gn nht vi vch 0 ca du xch s chi s nguyn ca (mm). Phn thp phn: xem vch no ca du xch trng vi vch ca thc chnh ta c phn l ca kch thc trn du xch.
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1.4 Mt s loi thc cp
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Chng 2: Panme
2.1 Cu to:
- Anvil: ci e - Spindle: trc vt - Ratchet knob:bc nm vn
- Lock: cht hm - Thimble:bc du xch - Frame: gi
2.2 Phn loi:
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2.3 Cch s dng 2.3.1 Cch o:
- Trc khi o cn phi kim tra panme c chnh xc khng.
- Khi o tay tri cn pame, tay phi vn cho u o n gn tip xc th vn nm vncho u o tip xc vi vt ng p lc o. - Phi d cho ng tm ca 2 m o trng vi kch thc cn o. - Phi vn ai c hm c nh u o ng trc khi ly panme ra khi vt o. 2.3.2 Cch c kt qu: - Khi o da vo mp
trc ng ta c c smm v na mm ca kch thc chnh.
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- Da vo mt chun ng c nh trc chnh ta c c (%) mm trn mt vt ca thang chia (gi tr mi vch l 0,01 mm)
2.4 Mt s loi Panme
Panme thng dng
Panme in t
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Mt s loi Panme o su
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2.5 Cch bo qun Khng o vt ang quay,b mt th,bn. Hn ch ly thc ra khi vt o c th kt qu. Mt o ca thc phi gi gn cn thn. Khi dng xong phi lau sch bng gi sch v bi du m. t panme vo ng v tr trong hp.
Chng 3: ng h so
3.1 Cu to:
-
ng h so theo nguyn tc c gi tr chia 0,01mm vi phm vi o 0 2, 0 5 v 0 10 mm c ng knh lp (s 10) 8. Mun m rng phm vi ca ng h so c th dng o theo phng php tuyt i ngi ta cn thay i kt cu ca lo xo sao cho o lc t thay i trong sut c hnh
-
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trnh o ln. Phm vi o ca ng h so c th l : 0 20, 0 50, 0 100mm vi C= 0,01mm, vi ng knh lp 8.
3.2 Cng dng: - Kim tra sai lch hnh dng hnh hc ca chi tit gia cng: cn, van, trn, - Kim tra v tr tng i gia cc b mt chi tit nh: song song, vung gc, o, - Kim tra v tr tng i gia cc chi tit lp ghp vi nhau. - Kim tra kch thc bng phng php so snh, L loi dng c o
chnh xc n0.01-0.001mm .ng h in t cn chnh xc hn
3.3 Cch s dng Khi s dng ng h so trc ht phi g ln gi vn nng, sau chnh cho u o tip xc vi vt cn o. Mt ng h chia ra 100 vch. Vi ng h o thng gi tri mi vch bng 0,01mm ngha l khi thanh o di chuyn mt on bng 0,01 x 100 = 1mm,lc kim nh trn mt s nh quay i mt vch .Mi vch trn mt s nh l 1mm.Trang 10
-
iu chnh mt s ln cho kim ng v tr s 0. Di chuyn ng h so tip xc sut vi b mt cn kim tra.
3.4 Mt s loi ng h so:
ng h so c hc
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ng h so c hc
ng h so in t
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3.5 Cch bo qun: - ng h so l loi ng h o c chin xc cao, v vy trong qu trnh s dng cn ht sc nh nhng ,trng va p,gi khng xc, v mt ng h. - Khng nn n tay vo u o lm thanh o di chuyn mnh. - ng h so phi lun g ln gi, khi s dng xong phi t ng h ng v tr trong hp . - Khng ng h so ch m, khng c nhim v tuyt i tho lp ng h ra.
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