Cov khoom xav tau rau cov pwm yas

Cov kev ua haujlwm ntawm cov pwm yas yog txawv ntawm qhov txias stamping tuag, feem ntau yuav tsum tau ua haujlwm ntawm 150 degree C -200 degree C. Ntxiv rau qhov raug rau qee qhov kev kub siab, lawv kuj yuav tsum tiv taus qhov kub thiab txias. Raws li kev siv sib txawv thiab kev ua cov txheej txheem ntawm cov yas molding pwm, cov txheej txheem kev ua tau zoo ntawm cov hlau siv hauv cov pwm yas yog kwv yees li hauv qab no:
1. Txaus deg hardness thiab hnav tsis kam
Lub hardness ntawm cov pwm yas feem ntau yog qis dua 50-60HRC, thiab cov pwm uas tau txais kev kho cua sov yuav tsum muaj qhov tawv txaus kom ntseeg tau tias cov pwm muaj qhov nruj txaus. Vim lub filling thiab ntws ntawm yas, pwm yog raug rau compressive kev nyuaj siab thiab kev sib txhuam thaum ua hauj lwm. Yog li ntawd, nws yog ib qho tsim nyog rau cov pwm kom tswj tau qhov tseeb thiab qhov ruaj khov kom ntseeg tau tias lub neej ua haujlwm txaus. Kev hnav tsis kam ntawm pwm nyob ntawm cov tshuaj muaj pes tsawg leeg thiab kev kho cua sov hardness ntawm cov hlau, yog li ua kom lub zog ntawm pwm yog qhov zoo rau kev txhim kho lawv cov hnav tsis kam.
2. Zoo heev machinability
Feem ntau cov yas molding pwm xav tau qee qhov kev txiav thiab kho kom haum ntxiv rau EMD ua. Txhawm rau txuas ntxiv lub neej kev pab cuam ntawm cov cuab yeej txiav, txhim kho kev ua haujlwm ntawm kev txiav, thiab txo qhov roughness ntawm qhov chaw, lub hardness ntawm yas pwm steel yuav tsum tsim nyog.
3. Kev ua haujlwm zoo polishing
Cov khoom yas zoo siab yuav tsum muaj qhov me me roughness qhov tseem ceeb ntawm cov pwm kab noj hniav. Piv txwv li, tus nqi nto roughness ntawm qhov txhaj tshuaj pwm kab noj hniav yuav tsum tsawg dua Ra0.1-0.25, thaum lub qhov muag qhov muag yuav tsum Ra<0.01nm. The cavity must be polished to reduce the surface roughness value. The steel selected for this purpose requires minimal impurities, fine and uniform microstructure, no fiber directionality, and no pitting or orange peel like defects during polishing.
4. Zoo thermal stability
Cov duab ntawm cov khoom hauv cov yas txhaj tshuaj pwm yog feem ntau nyuaj thiab nyuaj rau txheej txheem tom qab quenching. Yog li ntawd, nws raug nquahu kom xaiv cov uas muaj thermal stability zoo. Tom qab kev kho cua sov, cov pwm muaj me me coefficient ntawm linear expansion thiab deformation, thiab qhov hloov pauv loj npaum li cas los ntawm qhov sib txawv ntawm qhov kub thiab txias yog me me. Lub microstructure thiab pwm loj yog qhov ruaj khov, thiab kev ua haujlwm tuaj yeem raug txo lossis tshem tawm kom ntseeg tau qhov tseeb qhov tseeb thiab qhov xav tau ntawm qhov roughness ntawm cov pwm.
Cov pa roj carbon steel qib 45 thiab 50 muaj qee lub zog thiab hnav tsis kam, thiab feem ntau yog siv los ua pwm cov ntaub ntawv tom qab quenching thiab tempering kho. Cov cuab yeej carbon siab steel thiab cov cuab yeej qis-alloy steel muaj lub zog siab thiab hnav tsis kam tom qab kev kho cua sov, thiab feem ntau yog siv los ua qhov chaw. Txawm li cas los xij, cov cuab yeej carbon siab tsuas yog tsim nyog rau kev tsim cov khoom me me thiab yooj yim zoo li molded qhov chaw vim nws qhov kev kho cua sov loj deformation.
Nrog rau txoj kev loj hlob ntawm cov yas kev lag luam, cov complexity thiab precision yuav tsum tau ntawm cov khoom yas yog nce siab, thiab siab dua xav tau kuj muab tso rau cov khoom pwm. Rau kev tsim cov khoom lag luam, meej, thiab corrosion-resistant yas pwm, pre hardened steel (xws li PMS), corrosion-resistant steel (xws li PCR), thiab low-carbon martensitic aging steel (xws li 18Ni-250) tuaj yeem siv, txhua yam uas muaj kev txiav zoo, kev kho cua sov, kev ua haujlwm polishing, thiab lub zog siab.
Tsis tas li ntawd, thaum xaiv cov khoom siv, nws tseem yuav tsum tau xav txog kev tiv thaiv kev khawb thiab kev sib txuas. Yog tias muaj kev sib txheeb ze ntawm ob qhov chaw, sim zam kev xaiv cov khoom siv nrog tib lub koom haum. Hauv qhov xwm txheej tshwj xeeb, ib sab tuaj yeem plated lossis nitrided kom muab ob sab sib txawv ntawm cov qauv.