CBN Inserts vs. Carbide Inserts: Tus Nqi-Effectiveness Formula rau Hard Material Machining
CBN Inserts vs. Carbide Inserts: Tus Nqi-Effectiveness Formula rau Hard Material Machining
Hauv kev tsim khoom niaj hnub no, kev siv cov khoom siv nyuaj tau dhau los ua ntau dua, tshwj xeeb tshaj yog nyob rau hauv kev lag luam xws li tsheb, aerospace, thiab cov cuab yeej siv, qhov nyuaj ntawm cov khoom siv feem ntau tshaj HRC50. Hauv qhov no, kev xaiv cov cuab yeej cuam tshuam ncaj qha rau kev tsim khoom, kev ua haujlwm zoo, thiab tag nrho cov nqi. Ntawm cov kev xaiv muaj,CBN (Cubic Boron Nitride) insertsthiabcarbide insertsyog ob txoj kev daws teeb meem loj.
Kab lus no sib piv ob ntawm plaub qhov tseem ceeb -hardness, kub tsis kam, cuab yeej lub neej, thiab nqi-kom qhia meej txog qhov zoo tshaj plaws daim ntawv thov ciam teb ntawm CBN inserts. Nws kuj nthuav qhia cov ntaub ntawv kawm txog tus nqi-cov txiaj ntsig hauv automotive Cheebtsam machining.
I. Kev sib piv kev ua haujlwm
1. Hardness
CBN Inserts: Thib ob tsuas yog pob zeb diamond hauv hardness, zoo tagnrho rau machining hardened steels saum HRC50, hmoov metallurgy, thiab high-temperature alloys.
Carbide InsertsHardness nyob ib ncig ntawm HRA90. Cov cuab yeej hnav nrawm nrawm thaum cov khoom siv ua haujlwm siab dua HRC45.
2. Thaum tshav kub kub tsis kam
CBN Inserts: Tiv thaiv qhov kub txog li 1200 ° C, haum rau kev kub ceev qhuav txiav, txo cov kev siv coolant.
Carbide Inserts: Kub tiv taus mus txog ~ 800 ° C; Nws yooj yim rau cov yas deformation thiab flank hnav ntawm kev kub ceev.
3. cuab yeej lub neej
CBN Inserts: Tau 5-10 npaug ntev dua carbide thaum machining hardened cov ntaub ntawv, muab ntau dua stability.
Carbide Inserts: Cov cuab yeej lub neej poob qis heev ntawm cov ntaub ntawv nyuaj, yuav tsum tau hloov ntau zaus thiab ua rau lub sijhawm poob qis.
4. Tus nqi
CBN Inserts: Tus nqi siab dua rau ib qho ntxig, tab sis tus nqi ib feem txo qis vim lub neej ntev dua.
Carbide Inserts: Tus nqi pib qis dua, tab sis kev hloov tsis tu ncua nce nqi tag nrho.
II. Daim ntawv thov ciam teb ntawm CBN Inserts
Raws li cov kev ntsuas no, qhov zoo tshaj plaws scenarios rau CBN inserts tuaj yeem raug suav hais tias yog:
Khoom hardness: HRC50 thiab siab dua, xws li hardened steels, hmoov metallurgy, thiab high-temperature alloys.
Ntau lawm batch loj: Nruab nrab mus rau loj ntim, qhov twg lub cuab tam lub neej zoo offsets nqi.
Precision xav tau: Dimensional kam rau ua IT6 los yog zoo dua, nto roughness Ra ≤ 0.8 μm.
Machining txoj kev: High-speed qhuav txiav, semi-tiav, los yog tiav.
Thaum cov ntaub ntawv hardness qis dua (hauv qab HRC45), batch loj me me, los yog qhov yuav tsum tau ua kom zoo yog nruab nrab, carbide inserts tseem yog qhov kev xaiv zoo dua.
III. Automotive Component Case Study
Noj tom qab kev kho cua sov-kho tiav ntawm automotive kis tau tus mob ua piv txwv:
Khoom siv: 20CrMnTi, hardened rau HRC58–62.
Machining xav tau: Dimensional raug IT6, nto roughness Ra0.8.
| Yam khoom | CBN Insert | Carbide ntxig |
|---|---|---|
| Ntxig nqe | ~ 5 × siab tshaj carbide | Lub hauv paus |
| Tool lub neej | 6 × ntev | 1 × (lub hauv paus) |
| Lub sijhawm poob rau kev hloov cuab yeej | Tsawg | Siab |
| Machining efficiency | High-speed qhuav txiav, + 20% efficiency | Tsawg-ceev txiav, coolant yuav tsum tau |
| Nqi rau ib feem | ~ 15% qis dua | Lub hauv paus |
Qhov tshwm sim:Nyob rau hauv high-hardness, loj-batch, high-precision iav machining, txawm hais tias CBN inserts yog kim dua ib thooj, lawv lub neej ntev dua, tsawg dua cov cuab yeej hloov, thiab kev ua tau zoo dua txo cov nqi ib feem thaum ua kom zoo ib yam thiab cov seem seem.
IV. Xaus thiab Tool Xaiv Formula
Rau workpieces saum HRC50, nrog rau siab precision thiab loj-batch yuav tsum tau,CBN inserts xa cov nqi ua tau zoo tshaj plaws, ho txo tag nrho cov nqi tsim khoom thiab boosting efficiency. Rau qis hardness lossis me me-batch txoj haujlwm,carbide inserts tseem siv tau thiab kev lag luam.
Simplified Tool Selection Formula:
Yog tias (Cov Khoom Siv Hardness ≥ HRC50) THIAB (Batch Loj ≥ Nruab Nrab) THIAB (Precision ≥ IT6)→ XaivCBN Insert
Lwm tus→ XaivCarbide ntxig
Cov lag luam tuaj yeem siv cov qauv no raws li kev txiav txim siab ceev, thaum tseem xav txog cov cuab yeej muaj peev xwm, txiav ceev, thiab cov cua txias. Tsim kom muaj kev ua tiav cov txiaj ntsig kev txheeb xyuas tus qauv rau kev xaiv cov cuab yeej yuav ua rau kom muaj txiaj ntsig ntau thiab kev sib tw.
