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ùYhÓ°lùTôÚhL°u ùRôÏl× E°L[ôLl TVuTÓjR Ø¥VôÕ. CRû]l
(Grouping of tool material) ©jRû[l Tt±ûQlTôL, ETúVô¡jÕ®hÓ
G¬YûL E° Øû]L[ôLÜm
¸rdLiP êuß ùRôÏl×L[ôL
TVuTÓjRXôm.
ùYhÓ°lùTôÚhLû[l ©¬dLXôm.
LûPNp CVk§W ùYhÓm åpL°u
• CÚm× NôokR åpùTôÚhLs (ferrous
tool materials) YûLLs (Lathe cutting types)
• CÚm×NôWô åpùTôÚhLs (non-ferrous LûPNp Gk§WeL°p TVuTÓjRlTÓm
tool materials) ùYhÓm åpLs ©uYÚUôß
• EúXôLªpXôR åpùTôÚhLs - §PYûL ùYhÓm åpLs (solid type tools)
(non-metalic tool materials) - ©jRû[l TtÈÓ ùNnVlTÓm ùYhÓm
CÚm× NôokR E°lùTôÚhLs (ferrous tool åpLs (brazed type tools)
materials)
- Ht©LÞP]ô] ùNÚÏYûLjÕiÓLs
CYt±p CÚm× CPm ùT\ôÕ. CRu (inserted bits with holders)
LXûYL°p PevPu, ùY]¥Vm, - G± YûL ùYhÓm åpLs (throw-away type
UôXõl¥]m, Utßm vùPûXh úTôu\ tools-carbide)
EúXôLeLs APe¡«ÚdÏm.
§P YûL ùYhÓm åpLs (solid type tools)
LôoûTÓLs (carbides) (Fig 1)
CûYÙm, CÚmTpXôR YûLLû[f
NôokRûY. CûY EúXôLj çs
ùRô¯pÖhT Øû\«p EÚYôdLlThPûY.
L¬ Utßm PevPu CqYûLL°u Ød¡V
áhÓl ùTôÚhLs BÏm.
EúXôLUpXôR ùTôÚhLs (non-ferrous tool
materials)
CqYûL E°l ùTôÚhLs EúXôLªpXôR
ùTôÚhL[ôXô]ûY. ÀeLôu YûL Ui
Utßm ûYWm CqYûLf NôÚm.
CqYûL ùYhÓ°L°u ùYhÓ ®°m×Ls,
EVoL¬ G@Ï (high carbin steel) Rôu ØRXõp NÕW, ùNqYL Utßm YhP Y¥Y ÏßdÏ
ùYhÓ° EtTj§dÏ A±ØLTÓjRlThPÕ. ùYhÓ ùLôiP §Pl ùTôÚhL°]ôp
CÕ ùNeL¥]j RuûU Ïû\Ü. CR]ôp NôûQ Ø¥l× ùNnVlTh¥ÚdÏm.
CYt±u ùYhÓm §\u úYLUôL Ïû\kÕ ùTÚYô¬Vô] LûPNp ùYhÓ°Ls
®Óm. PevPu, ÏúWôªVm, Utßm §PYûLLû[f úNokRûY. CûY EVoL¬
ùY]¥Vm úTôu\ áhÓl ùTôÚhLû[d G@Ï Utßm EVoúYL G@ÏL[ôXô]ûY.
ùLôiÓ EVo úYL G@Ï EtTj§ CqYûL ùYhÓ°L°u ¿[m Utßm ÏßdÏ
ùNnVlTÓ¡u\]. G@¡u ùNk¨ûXd ùYhÓ A[ÜLs CVk§Wj§u ùLôsÞm
L¥]jRuûU EVoL¬ G@ûL®P §\u, E°jç¦u YûL Utßm LûPNp
A§LUô]Õ. T¦«u RuûUûVl ùTôÚjÕ
AûUk§ÚdÏm.
HS G@¡]ôp §PUô] åpLs, ©jRû[l
Tt±ûQl©Xô] E°Ls Utßm ùNÚL Ht©LÞdLô] ùNÚÏYûLj ÕiÓLs
YûL E°Ls B¡VYtû\ EÚYôdL Ø¥Ùm. (Inserted bits with holders) (Fig 2)
CûY EVoL¬ G@ûL®P ®ûXÙVokRRôÏm.
§P YûL EVoúYL G@Ï E°Ls ®ûX
LôoûTÓ ùYhÓ° ªL A§LUôL
EVokRûY. BLúY, £X úSWeL°p AûY
ùYlT¨ûX«Ûm R]Õ L¥]j RuûUûV
ùNÚÏYûL ÕiÓL[ôLl
RdLûYjÕd ùLôsÞm. úUÛm LôoûTÓ
TVuTÓjRlTÓ¡u\]. CûY, £±V
E°«u, EûPÙm RuûU (brittieness) Utßm
A[®Ûm, Ht©«p Es[ Õû[«p
A§L ®ûX«u LôWQUôL CRû]j §P
£_õ & Gm: @©hPo (NSQF - Revised 2022) R.T. for Ex.1.7.96 381
