Xây dựng đầu đo khí nén độ phân giải micromet ứng dụng đo sai lệch độ tròn

NGHIEN cflu-TRAOePi

XAY DljNG DAU DO KHf NEN D O PHAN GIAI MICROMET

tfNG DUNG DO SAI LECH D O TRON

DESIGN A PNEUMATIC MEASURING PROBE FOR ROUNDNESS MEASUREMENT WITH

MICROMET RESOLUTION

TrUdng Cong Tuin, Vu Toin Thing

TrUdng Dai hpc Bich Ichoa Hi Npi

TOM TAT

Dot vdi cdc mdy do dd trdn hiin nay, ddu do sii dung chu yeu la dang ddu do tiep xuc. Stl tiip xuc

gdy mdn ddu do vd chi tiet do ldm sai lich kit qud do. Chinh vi thi md y tiidng sd dung ddu do khi nen

cd do phdn gidi cao vd khdng tiep xuc vdi chi ttet do dd dUdc hinh thdnh. Ddu do ldm viic trin cd sd mot

quan hi gida dp sudt vd yeu to cdn trin ddng chdy cita nd, cd sd tinh todn cdc thdng so cd bdn Id ditdng

kinh tiet diin chdy, khe hd gida yeu to cdn vd ddu do. Di ciing vdi Uu diem do phdn gidi cao dqt O.ljjm Id

nhUdc diem miin tuyin tinh itng vdi khe hd z hep SOfim. Vt the, cdc phUdng dn ddu do dich chuyen bdm

theo biin dang da dUdc dUa ra. Do chinh xdc cua cdc dich chuyen bdm dqt±lfim. Bdi bdo ndy Id kit qud

cua viic xdy dting thdnh cdng ddu do khi nen sd dung trong do sai lich do trdn vdi dg nhqy cao vd xdy

dting nhdng phUdng dn ddu do bdm theo biin dqng chi tiet do.

In roundness measuring Machine , contact probes used very common. The contact make probe

qnd specimen wear and effect on result of meqsurement. The pneumatic probe works on the busts of the re￾lationship between pressure and resistance elements on the flow of it. The calculating method bases on the

flgw cross-sectign diameter, thegap between the transducer element and the measuring probe. Besidehigh

resolution (O.I fim), the pneumatic probe have a disadvantage is narrow of linear rqnge (30 (im). So that

some method for the pneumatic probe flow to profile of specimen are given. Precision of the movement

±lpm The paper is results of develop successfully the roundness-measuring equipment using compressed

air which has characteristic curve with wide linear range and high sensitivity and develop method the

probe can flow to profile of specimen.

TAP CHl CO KHI VIET NAM • S6 6 (Thing 6 nam 2012)