Ngaba uyazazi ezi magama: I-Helix angle, i-point angle, i-main cutting edge, iprofayili yeflute? Ukuba akunjalo, kufuneka uqhubeke ufunda. Siza kuphendula imibuzo efana nale: Yintoni i-secondary cutting edge? Yintoni i-helix angle? Zichaphazela njani ukusetyenziswa kwisicelo?
Kutheni kubalulekile ukwazi ezi zinto: Izixhobo ezahlukeneyo zibeka iimfuno ezahlukeneyo kwisixhobo. Ngenxa yesi sizathu, ukukhethwa kwe-twist drill enesakhiwo esifanelekileyo kubaluleke kakhulu kwisiphumo sokugrumba.
Makhe sijonge iimpawu ezisibhozo ezisisiseko ze-twist drill: I-point angle, i-main cutting edge, i-cut chisel edge, i-point cut kunye ne-point thinning, i-profile ye-flute, i-core, i-secondary cutting edge, kunye ne-helix angle.
Ukuze kufezekiswe ukusebenza kakuhle kokusika kwizixhobo ezahlukeneyo, zonke iimpawu ezisibhozo kufuneka zihambelane.
Ukuze sibonise oku, sithelekisa ezi drill zintathu zilandelayo:
I-engile yenqaku
I-engile yenqaku ikwintloko ye-twist drill. I-engile ilinganiswa phakathi kwemiphetho emibini ephambili yokusika phezulu. I-engile yenqaku iyimfuneko ukuze i-twist drill ibe phakathi kwezinto.
Okukhona i-engile yenqaku incinci, kokukhona kulula ukuyifaka embindini wento. Oku kunciphisa nomngcipheko wokutyibilika kwiindawo ezigobileyo.
Okukhona i-engile yenqaku inkulu, kokukhona ixesha lokucofa lifutshane. Nangona kunjalo, kufuneka uxinzelelo oluphezulu loqhagamshelwano kwaye ukubethelela phakathi kwezinto kuba nzima.
Ngokwejometri, i-engile yenqaku elincinci ithetha imiphetho emide yokusika, ngelixa i-engile yenqaku elikhulu ithetha imiphetho emifutshane yokusika.
Imiphetho ephambili yokusika
Imiphetho ephambili yokusika ithatha indawo yenkqubo yokugrumba. Imiphetho emide yokusika inokusebenza okuphezulu kokusika xa kuthelekiswa nemiphetho yokusika emfutshane, nokuba umahluko mncinane kakhulu.
I-twist drill isoloko inemiphetho emibini ephambili yokusika edityaniswe ngumphetho we-cut chisel.
Sika umphetho wetshisile
Umphetho we-chisel osikiweyo uphakathi kwencam yokubhola kwaye awunasiphumo sokusika. Nangona kunjalo, ubalulekile ekwakhiweni kwe-twist drill, njengoko udibanisa imiphetho emibini ephambili yokusika.
Umphetho wetshiseli osikiweyo unoxanduva lokungena kwezinto kwaye ubeka uxinzelelo kunye nokungqubana kwezinto. Ezi mpawu, ezingalungelanga inkqubo yokugrumba, zibangela ukwanda kokuveliswa kobushushu kunye nokusetyenziswa kwamandla okwandisiweyo.
Nangona kunjalo, ezi mpawu zinokuncitshiswa yinto ebizwa ngokuba “kukuncitshiswa”.
Ukunqunyulwa kwamanqaku kunye nokuncipha kwamanqaku
Ukunciphisa inqaku kunciphisa umphetho we-chisel osikiweyo phezulu kwe-twist drill. Ukunciphisa kuphumela ekunciphiseni okukhulu kwamandla okungqubana kwizinto kwaye ngaloo ndlela kunciphisa amandla okutya afunekayo.
Oku kuthetha ukuba ukuncitshiswa yeyona nto ibalulekileyo ekugxileni phakathi kwezinto. Kuphucula ukucofa.
Ukuncipha kwamanqaku ahlukeneyo kumiselwe ngokwemilo ye-DIN 1412. Ezona milo zixhaphakileyo yi-helical point (imilo u-N) kunye ne-split point (imilo u-C).
Iprofayili yeflute (iprofayili yegroove)
Ngenxa yomsebenzi wayo njengenkqubo yesiteshi, iprofayili yeflute ikhuthaza ukufunxwa nokususwa kweetships.
Okukhona iprofayili yomngxuma ibanzi, kokukhona kungcono ukufunxwa nokususwa kwetshiphusi.
Ukususwa kakubi kweetshiphusi kuthetha ukukhula kobushushu obuphezulu, okunokukhokelela ekutsalweni kwe-annealing kwaye ekugqibeleni kuphuke i-twist drill.
Iiprofayili zemijelo ebanzi zithe tyaba, iiprofayili zemijelo ebhityileyo zinzulu. Ubunzulu beprofayili yemijelo bumisela ubukhulu bombindi we-drill. Iiprofayili zemijelo ethe tyaba zivumela ububanzi obukhulu (obutyebileyo) bemijelo. Iiprofayili zemijelo enzulu zivumela ububanzi obuncinci (obutyebileyo) bemijelo engundoqo.
Umongo
Ubukhulu be-core buyindlela yokulinganisa ukuzinza kwe-twist drill.
Iidrill ezijijekileyo ezinobubanzi obukhulu (obutyebileyo) zizinzile kakhulu kwaye ngenxa yoko zifanelekile kwiitorque eziphezulu kunye nezixhobo eziqinileyo. Zikwafanelekile kakhulu ukusetyenziswa kwiidrill zesandla njengoko zixhathisa ngakumbi kwiintshukumo kunye namandla asecaleni.
Ukuze kube lula ukususwa kweetships kwi-groove, ubukhulu be-core buyanda ukusuka kwincam yokubhola ukuya kwi-shank.
Ii-chamfers ezikhokelayo kunye nemiphetho yokusika yesibini
Ii-chamfer ezimbini ezikhokelayo zifumaneka kwiiflute. Ii-chamfer ezitsolo ezicoliweyo zisebenza ngakumbi kwiindawo ezisemacaleni ze-borehole kwaye zixhasa isikhokelo se-twist drill kumngxunya ogqojoziweyo. Umgangatho weendonga ze-borehole ukwaxhomekeke kwiimpawu ze-chamfers ezikhokelayo.
Umphetho wesibini wokusika wenza utshintsho ukusuka kwi-chamfers ezikhokelayo ukuya kwiprofayili ye-groove. Iyakhulula kwaye inqumle iitships ezinamathele kwizinto.
Ubude bee-chamfers zesikhokelo kunye nemiphetho yokusika yesibini ixhomekeke kakhulu kwi-engile ye-helix.
I-engile ye-Helix (i-engile ejikelezayo)
Uphawu olubalulekileyo lwe-twist drill yi-helix angle (i-spiral angle). Imisela inkqubo yokwakheka kwe-chip.
Ii-engile ezinkulu ze-helix zisusa ngokufanelekileyo izinto ezithambileyo nezinqamla ixesha elide. Ii-engile ezincinci ze-helix, kwelinye icala, zisetyenziselwa izinto eziqinileyo nezinqamla ixesha elifutshane.
Iidrill ezijijekileyo ezine-engile encinci kakhulu ye-helix (10° – 19°) zine-spiral ende. Ngokubuyisela, i-twist drill ene-engile enkulu ye-helix (27° – 45°) ine-spiral ejijekileyo (mfutshane). Iidrill ezijijekileyo ezine-spiral eqhelekileyo zine-engile ye-helix ye-19° – 40°.
Imisebenzi yeempawu kwisicelo
Xa uqala ukubona, umxholo wee-twist drills ubonakala unzima kakhulu. Ewe, kukho izinto ezininzi kunye neempawu ezahlula i-twist drill. Nangona kunjalo, iimpawu ezininzi zixhomekeke kwenye.
Ukuze ufumane i-twist drill echanekileyo, ungaziqhelanisa nesicelo sakho kwinyathelo lokuqala. Incwadana ye-DIN yee-drills kunye nee-countersink ichaza, phantsi kwe-DIN 1836, ukwahlulahlula amaqela esicelo abe ziintlobo ezintathu u-N, u-H, kunye no-W:
Kule mihla awuyi kufumana kuphela ezi ntlobo zintathu u-N, u-H, kunye no-W kwimarike, kuba ngokuhamba kwexesha, ezi ntlobo ziye zahlelwa ngokwahlukileyo ukuze kuphuculwe ii-twist drills kwizicelo ezikhethekileyo. Ngoko ke, kuye kwenziwa iifom ze-hybrid apho iinkqubo zazo zokubiza amagama zingamiselwanga kwi-DIN manual. Kwi-MSK awuyi kufumana kuphela uhlobo u-N kodwa kunye neentlobo ze-UNI, UTL okanye i-VA.
Isiphelo kunye nesishwankathelo
Ngoku uyazi ukuba zeziphi iimpawu ze-twist drill ezichaphazela inkqubo yokugrumba. Le theyibhile ilandelayo ikunika umbono wezona mpawu zibalulekileyo zemisebenzi ethile.
| Umsebenzi | Iimbonakalo |
|---|---|
| Ukusika ukusebenza | Imiphetho ephambili yokusika Imiphetho ephambili yokusika ithatha indawo yenkqubo yokugrumba. |
| Ubomi benkonzo | Iprofayili yeflute (iprofayili yegroove) Iprofayili yeflute esetyenziswa njengenkqubo yetshaneli inoxanduva lokufunxa nokususa iitships, ngoko ke, yinto ebalulekileyo ebomini benkonzo ye-twist drill. |
| Isicelo | I-engile yenqaku kunye ne-engile ye-Helix (i-engile ejikelezayo) I-angle yenqaku kunye ne-angle ye-helix zezona zinto zibalulekileyo ekusetyenzisweni kwezinto eziqinileyo okanye ezithambileyo. |
| Ukubeka embindini | Ukunqunyulwa kwamanqaku kunye nokuncipha kwamanqaku Ukunqunyulwa kwamanqaku kunye nokuncitshiswa kwamanqaku zezona zinto zibalulekileyo ekubekweni kwindawo ephambili kwezinto. Ngokunciphisa umphetho wetshiseli osikiweyo uncitshiswa kangangoko kunokwenzeka. |
| Ukuchaneka kokugxila | Ii-chamfers ezikhokelayo kunye nemiphetho yokusika yesibini Ii-chamfers ezikhokelayo kunye nemiphetho yokusika yesibini ichaphazela ukuchaneka kokugxila kwe-twist drill kunye nomgangatho womngxuma wokugrumba. |
| Uzinzo | Umongo Ubukhulu be-core yeyona ndlela ibalulekileyo yokulinganisa uzinzo lwe-twist drill. |
Ngokwenyani, unokumisela isicelo sakho kunye nezinto ofuna ukuzisebenzisa.
Jonga ukuba zeziphi ii-twist drills ezinikezelwayo kwaye uthelekise iimpawu kunye nemisebenzi oyifunayo ukuze izinto zakho zigqojwe.
Ixesha lokuthumela: Agasti-12-2022
