Yuav Ua Li Cas Txiav Ib Tug Tungsten Qws?

Koj txiav li cas atungsten pas nrig?

 

Peb paub tias qhov hardness ntawm cov khoom siv nws tus kheej yuav tsum siab tshaj qhov hardness ntawm lub workpiece ua tiav. Rockwell hardness ntawm cemented carbide feem ntau nyob ib ncig ntawm HRA78 txog HRA90. Yog tias koj xav kom tau qhab nia zoo lossis txiav tawm cov carbide rods, koj tuaj yeem siv plaub txoj hauv qab no: kev sib tsoo lub log, kev ua cov khoom siv superhard, electrolytic machining (ECM), thiab hluav taws xob tawm machining (EDM).

 

1. Sib tsoo cov carbide pas nrig nrog lub log sib tsoo
Cov ntaub ntawv uas tuaj yeem siv los ua cov cemented carbide blanks yav tom ntej feem ntau yog xa mus rau polycrystalline cubic boron nitride (PCBN) thiab polycrystalline pob zeb diamond (PCD).

 

Cov ntaub ntawv tseem ceeb ntawm kev sib tsoo log yog ntsuab silicon carbide thiab pob zeb diamond. Txij li thaum sib tsoo silicon carbide tsim thermal stresses tshaj lub zog txwv ntawm carbide, nto tawg feem ntau tshwm sim, ua silicon carbide tsis zoo tagnrho rau tsim guaranteed nto.

 

Txawm hais tias lub PCD sib tsoo lub log yog txaus los ua kom tiav tag nrho cov dej num los ntawm kev ntxhib machining kom tiav ntawm cov carbide dawb paug, thiaj li yuav txo tau qhov poob ntawm lub sib tsoo log, lub carbide dawb paug yuav tsum pre-processed siv hluav taws xob machining txoj kev, thiab ces semi-tiav lawm. thiab ua tiav. -Qhov kawg tiav nrog lub log sib tsoo.

 

2. Txiav carbide rods los ntawm milling thiab tig
CBN thiab PCBN cov ntaub ntawv yog npaj los ua ib txoj hauv kev txiav cov hlau tawv tawv xws li cov hlau tawv tawv thiab cov hlau cam (hlau). Boron nitrite tuaj yeem tiv taus qhov kub thiab txias (siab tshaj 1000 degrees) thiab tuav lub hardness ntawm 8000HV. Cov yam ntxwv no ua rau nws piv rau kev ua haujlwm ntawm carbide blanks, tshwj xeeb tshaj yog rau cov khoom siv uas muaj kev cuam tshuam ntawm cov tub ntxhais carbide thiab lub plhaub hlau.

 

Txawm li cas los xij, thaum lub hardness ntawm carbide qhov siab siab tshaj HRA90, boron nitrite tsis tuaj yeem txiav txhua, thiab tsis tas yuav hais kom siv PCBN thiab CBN cov cuab yeej. Hauv qhov no peb tuaj yeem tig mus rau pob zeb diamond PCD cov cuab yeej ua lwm txoj hauv kev.

 

Peb tseem tsis tuaj yeem tsis quav ntsej txog qhov tsis txaus ntawm PCD inserts, uas tsis tuaj yeem tau txais cov npoo ntse heev thiab tsis yooj yim rau siv cov chip tawg. Yog li, PCD tsuas yog siv tau rau kev txiav cov hlau tsis muaj hlau thiab cov hlau tsis muaj hlau, tab sis tsis tuaj yeem ua tiav ultra-precision iav txiav ntawm carbide blanks, tsawg kawg tseem tsis tau.

 

3. Electrochemical machining (ECM)
Electrochemical machining siv lub hauv paus ntsiab lus uas carbides tuaj yeem yaj hauv electrolyte (NaOH) los ua cov khoom. Nws xyuas kom meej tias qhov chaw ntawm carbide workpiece tsis kub. Qhov tseem ceeb yog tias kev ua haujlwm ceev thiab kev ua haujlwm zoo ntawm ECM tsis muaj dab tsi cuam tshuam nrog lub cev ntawm cov khoom siv ua tiav.

 

4. Hluav taws xob tawm machining (EDM)
Lub hauv paus ntsiab lus ntawm EDM yog siv cov hluav taws xob corrosion tshwm sim ntawm lub cuab yeej thiab cov khoom ua haujlwm (zoo thiab tsis zoo electrodes) thaum lub sij hawm pulse spark discharge kom tshem tawm cov carbide ntau dhau los ua kom tiav qhov loj me, cov duab thiab qhov zoo ntawm qhov yuav tsum tau ua. khoom cuav. Tsuas yog tooj liab-tungsten electrodes thiab tooj liab-nyiaj electrodes tuaj yeem ua cov carbide blanks.

 

Nyob rau hauv luv luv, EDM tsis siv txhua yam zog thiab tsis cia siab rau txiav quab yuam kom tshem tawm hlau. Hloov chaw, nws ncaj qha siv hluav taws xob thiab cua sov kom tshem tawm cov khoom carbide.