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ARtϬV ¨ûX«p engage TiQ Ø¥Ùm
(Fig 4)
Feed shaft B]Õ ARu CVdLjûR (drive)-I
quick change ¸VoTôd³p CÚkÕ ùTß¡\Õ
Utßm HlWôu ùUdLô²Nj§u Y¯VôL

driver, driven Utßm Idler gears Lû[ Uôtßm
YN§ (provision for changing) JÚ áÓRp unit BL
@ÀÓ Uôtßm (feed changing) úSôdLj§tLôL
CÚdÏm set of change gears-p CÚkÕ ÀÓ ú`l¥p ÑZt£ CVdLUô]Õ åXõu
¡ûPd¡\Õ (Fig 3) úSo úLôhÓ CVdLUôL (linear movement)
Uôß¡\Õ.

ÀÓ `ô@l¥p CÚkÕ CVdLjûR (drive I)
tool-u ¿[YôhÓ SLoÜdLôL (for the longitudinal
movement) saddle-dÏ LPjRÜm (transmit
TiQÜm) ApXÕ åXõu ÏßdLô]
SLoÜdLôL (transverse movement) CVdLjûR
¡WôvþvûXÓdÏd (croseslidedÏ) LPjRÜm
Apron mechanism-p YN§ Es[Õ (Fig 5)

Quick change gear box B]Õ ARu box castingtÏ
ùY°l×\j§p leverLû[d ùLôiÓs[Õ
Utßm CkR ÄYoLû[ shiffting TiÔYRu
êXm åÛdÏ ùYqúYß FhP ÅRm (feed
rates) RW HÕYôL ùYqúYß ¸VoLû[
CûQdLØ¥Ùm úLv¥e¡p JÚ chart
JhPlThÓs[Õ. CkR chart B]Õ
ÄYoL°u ùYqúYß position-dÏ ùYqúYß
feed rate-I LôhÓd¡\Õ. CkR chartI TôojÕ
úRûYlTÓm feed rate-dÏ ÄYoLû[ AÕ

UûW ùYhÓRp þ G°V Utßm áhÓ TtNdLWjùRôPo (Thread cutting with
simple and compound gear trains)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• G°V Utßm áhÓ TtNdLWjùRôPo êXm UûW ùYhÓYÕ.

Uôtßl TtNdLWj ùRôPo (Change gear train) Õ¬RUôtßl TtNdLWl ùTh¥ûVÙm

¨ûXVôL ùTôÚjRlThÓ Es[ vPh ¡Vo CûQdLl TVuTÓjRlTÓm ¡WUUô]

372 £_õ & Gm: @©hPo (NSQF - Revised 2022) R.T. for Ex.1.7.92