Iimpawu ezi-8 ze-twist drill kunye nemisebenzi yayo

Ngaba uyawazi la magama: I-engile ye-Helix, i-angle ye-point, i-main cut edge, iprofayili ye-flute? Ukuba akunjalo, kufuneka uqhubeke ufunda. Siza kuphendula imibuzo efana nale: Yintoni inqanaba lesibini lokusika? Yintoni i-engile ye-helix? Zikuchaphazela njani ukusetyenziswa kwesicelo?

Kutheni kubalulekile ukwazi ezi zinto: Izixhobo ezahlukeneyo zibeka iimfuno ezahlukeneyo kwisixhobo. Ngesi sizathu, ukukhethwa kwe-twist drill enesakhiwo esifanelekileyo kubaluleke kakhulu kwisiphumo sokomba.

Makhe sijonge kwiimpawu ezisibhozo ezisisiseko ze-twist drill: I-engile yenqaku, i-edge engundoqo yokusika, i-edge yokusika i-chisel, i-point cut kunye ne-point thinning, iprofayili yefleyiti, i-core, i-edge yokusika yesibini, kunye ne-engile ye-helix.

Ukuze kufezekiswe ukusebenza kakuhle kokusika kwizinto ezahlukeneyo, zonke iimpawu ezisibhozo kufuneka zihambelane.

Ukubonisa oku, sithelekisa ezi drili zintathu zilandelayo:

• I-twist drill DIN 338 , HSS-E
• I-twist drills DIN 338 , HSSE-Co M35
• Twist drill DIN 338, HSS 4341

Point angle

I-angle yenqaku ifumaneka kwintloko ye-twist drill. I-engile ilinganiswa phakathi kweendawo ezimbini eziphambili zokusika phezulu. I-angle yephoyinti iyimfuneko kwiziko le-twist drill kwizinto eziphathekayo.

Incinci i-angle yenqaku, kulula ukugxila kwizinto eziphathekayo. Oku kukwanciphisa umngcipheko wokutyibilika kwindawo egobileyo.

Inkulu i-engile yenqaku, lifutshane ixesha lokucofa. Nangona kunjalo, uxinzelelo oluphezulu loqhagamshelwano luyafuneka kwaye ukugxila kwizinto eziphathekayo kunzima.

Imo yejiyometri, i-engile yamanqaku amancinane ithetha imiphetho emide yokusika, ngelixa i-engile enkulu ithetha ikona ezimfutshane ezisikiweyo.

Imiphetho yokusika ephambili

Iindawo eziphambili zokusika zithatha eyona nkqubo yokwemba. Imida yokusika emide inomsebenzi ophezulu wokusika xa kuthelekiswa neengqungquthela ezimfutshane, nokuba ukungafani kuncinci kakhulu.

I-twist drill isoloko inemiphetho emibini yokusika edityaniswe ngongqameko olusikiweyo.

Sika i-chisel edge

Umphetho we-chisel osikiweyo uphakathi kwinqanaba le-drill kwaye akukho siphumo sokusika. Nangona kunjalo, kubalulekile ekwakhiweni kwe-twist drill, njengoko idibanisa iindawo ezimbini eziphambili zokusika.

Umphetho we-chisel osikiweyo unoxanduva lokungena kwizinto eziphathekayo kwaye ubeka uxinzelelo kunye nokukhuhlana kwizinto eziphathekayo. Ezi zakhiwo, ezingathandekiyo kwinkqubo yokomba, zibangela ukwanda kokuveliswa kobushushu kunye nokunyuka kokusetyenziswa kwamandla.

Nangona kunjalo, ezi zakhiwo zinokuncitshiswa ngento ebizwa ngokuba yi "thinning".

Ukunqunyulwa kweengongoma kunye nokunciphisa amanqaku

Inqaku lokunciphisa inqaku linciphisa umda we-chisel osikiweyo phezulu kwi-twist drill. Ukunciphisa kukhokelela ekunciphiseni okukhulu kwamandla okubetha kwizinto eziphathekayo kwaye ngaloo ndlela kuncitshiswa kwamandla okutya okuyimfuneko.

Oku kuthetha ukuba ukubhitya yeyona nto ibalulekileyo yokugxila kwizinto eziphathekayo. Iphucula ukucofa.

Iingongoma ezahlukeneyo zokucutha zibekwe emgangathweni kwiimilo ze-DIN 1412. Iimilo eziqhelekileyo ziyi-helical point (shape N) kunye ne-split point (shape C).

Inkangeleko yefluti (iprofayile yegroove)

Ngenxa yomsebenzi wayo njengenkqubo yetshaneli, iprofayili yefluti ikhuthaza ukufunxa kunye nokususwa kwe-chip.

Ibanzi iprofayile yegroove, ingcono ukufunxwa kwetshiphu kunye nokususwa.

Ukususwa kwetshiphu okulambathayo kuthetha ukukhula kobushushu obuphezulu, obunokuthi ngembuyekezo bukhokhelele ekufunyanweni kwaye ekugqibeleni kwaphuke i-twist drill.

Iiprofayile zegroove ezibanzi zisicaba, iiprofayili zegroove ezibhityileyo zinzulu. Ubunzulu beprofayili ye-groove bumisela ubukhulu be-drill core. Iiprofayili zegroove ezicaba zivumela iidayamitha ezingundoqo (ezityebileyo). Iiprofayili zegroove ezinzulu zivumela iidayamitha ezingundoqo ezincinci (ezincinci).

Undoqo

Ubukhulu obuphambili ngumlinganiselo wokugqiba ukuzinza kwe-twist drill.

Ii-twist drills ezinobubanzi obukhulu (obungqingqwa) bunozinzo oluphezulu kwaye ngoko ke zifanelekile kwiitorque eziphezulu kunye nezixhobo ezinzima. Zikwafaneleke kakhulu ukuba zisetyenziswe kwi-drill ngesandla njengoko zixhathisa ngakumbi kwii-vibrations kunye nemikhosi esecaleni.

Ukuze kube lula ukukhutshwa kwee-chips kwi-groove, ubukhulu be-core buyanda ukusuka kwi-drill tip ukuya kwi-shank.

Ii-chamfers ezikhokelayo kunye nemiphetho yokusika yesibini

Ezi zixhobo zimbini zokukhokela zimi kwiifluti. Ii-chamfers ezibukhali eziphantsi komhlaba zisebenza ukongezelela kwiindawo ezisecaleni ze-borehole kwaye zixhasa isikhokelo se-twist drill kwi-drilled drill. Umgangatho weendonga zequla kwakhona kuxhomekeke kwiipropati zesikhokelo se-chamfers.

Umphetho wokusika wesibini wenza utshintsho ukusuka kwisikhokelo se-chamfers ukuya kwiprofayili yegroove. Ikhulula kwaye inqumle iitshiphusi ezibambelele kwizinto eziphathekayo.

Ubude bee-chamfers zesikhokelo kunye neengqungquthela zokusika zesibini zixhomekeke kakhulu kwi-angle ye-helix.

I-engile ye-Helix (i-angle ejikelezayo)

Uphawu olubalulekileyo lwe-twist drill yi-engile ye-helix (i-angle ejikelezayo). Imisela inkqubo yokwenziwa kwe-chip.

Ii-engile ezinkulu ze-helix zibonelela ngokususwa okusebenzayo kwezinto ezithambileyo, ezide. Ii-angles ezincinci ze-helix, kwelinye icala, zisetyenziselwa izinto ezinzima, ezinqamlekileyo.

Ii-twist drills ezineengile ye-helix encinci kakhulu (10° – 19°) inomjikelo omde. Ukubuyisela, i-twist drill nge-engile enkulu ye-helix (27 ° - 45 °) ine-rammed (mfutshane) spiral. I-twist drills ene-spiral eqhelekileyo ine-engile ye-helix ye-19 ° - 40 °.

Imisebenzi yeempawu kwisicelo

Ekuqaleni, umxholo we-twist drills ubonakala unzima kakhulu. Ewe, kukho amacandelo amaninzi kunye neempawu ezahlula i-twist drill. Nangona kunjalo, iimpawu ezininzi zixhomekeke komnye.

Ukuze ufumane i-twist drill efanelekileyo, unokuziqhelanisa nesicelo sakho kwisinyathelo sokuqala. Incwadi ye-DIN ye-drills kunye ne-countersinks ichaza, phantsi kwe-DIN 1836, ulwahlulo lwamaqela ezicelo kwiintlobo ezintathu ze-N, H, kunye ne-W:

Kule mihla awuyi kufumana kuphela ezi ntlobo zintathu ze-N, H, kunye ne-W kwimarike, kuba ekuhambeni kwexesha, iindidi zicwangciswe ngokwahlukileyo ukuze kulungiswe i-twist drills kwizicelo ezizodwa. Ngaloo ndlela, iifom ze-hybridi zenziwe ukuba iinkqubo zazo zokuthiywa kwamagama zingekho emgangathweni kwi-DIN manual. Kwi-MSK awuyi kufumana kuphela uhlobo lwe-N kodwa kunye neentlobo ze-UNI, i-UTL okanye i-VA.

Isiphelo kunye nesishwankathelo

Ngoku uyazi ukuba zeziphi iimpawu ze-twist drill ezinefuthe kwinkqubo yokomba. Le theyibhile ilandelayo ikunika isishwankathelo sezona mpawu zibalulekileyo zemisebenzi ethile.

Ngokusisiseko, unokumisela isicelo sakho kunye nemathiriyeli ofuna ukugrumba kuyo.

Jonga ukuba zeziphi ii-twist drills ezibonelelwayo kwaye uthelekise iimpawu ezifanelekileyo kunye nemisebenzi oyifunayo ukuze imathiriyeli yakho igrunjwe.