Yas Pwm Khoom Yuav Tsum Tau

Kev ua haujlwm ntawm cov pwm yas yog txawv ntawm cov pwm txias stamping, uas feem ntau yuav tsum tau ua haujlwm ntawm 150 degree C -200 degree C. Ntxiv rau qhov raug rau qee qhov siab, lawv kuj yuav tsum tiv taus qhov kub thiab txias. Raws li cov kev siv sib txawv thiab cov txheej txheem ntawm kev tsim cov yas pwm, cov txheej txheem kev ua tau zoo ntawm cov hlau rau cov pwm yas yog kwv yees li hauv qab no:
1. Txaus qhov hardness thiab hnav tsis kam
Lub hardness ntawm cov pwm yas feem ntau yog qis dua 50-60HRC, thiab cov pwm kho cua sov yuav tsum muaj qhov tawv txaus kom ntseeg tau tias cov pwm muaj qhov nruj txaus. Vim yog lub siab compressive kev nyuaj siab thiab kev sib txhuam quab yuam uas cov yas ntim thiab ntws hauv pwm thaum lub sijhawm ua haujlwm, nws yuav tsum tau ua kom cov pwm tswj qhov tseeb thiab qhov ruaj khov kom ntseeg tau tias lub neej ua haujlwm txaus. Kev hnav tsis kam ntawm pwm yog 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 nws cov hnav tsis kam.
2. Kev ua haujlwm zoo heev
Feem ntau cov yas molds xav tau qee yam 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 cov hlau, cov tawv tawv ntawm cov hlau siv rau cov pwm yas yuav tsum tsim nyog.
3. Kev ua haujlwm zoo polishing
Cov khoom yas zoo siab yuav tsum muaj tus nqi me me rau ntawm qhov chaw ntawm cov pwm kab noj hniav. Piv txwv li, tus nqi nto roughness ntawm qhov txhaj tshuaj pwm kab noj hniav yuav tsum tsawg tshaj li theem ntawm Ra{{0}}.1 ~ 0.25, thaum qhov chaw kho 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, uniform microstructure, no fiber orientation, and no pitting or orange peel like defects during polishing.
4. Zoo thermal stability
Cov duab ntawm cov yas txhaj tshuaj pwm feem ntau yog nyuaj thiab nyuaj rau txheej txheem tom qab quenching. Yog li ntawd, nws raug nquahu kom xaiv qhov chaw nrog thermal stability kom ntau li ntau tau. Thaum cov pwm tsim thiab ua tiav los ntawm kev kho cua sov, cov kab hluav taws xob nthuav dav me me, kev kho cua sov deformation me me, thiab qhov hloov pauv loj npaum li cas los ntawm qhov kub sib txawv me me. Cov qauv metallographic thiab pwm loj yog qhov ruaj khov, thiab tuaj yeem txo lossis tsis ua tiav kom ntseeg tau tias pwm qhov tseeb thiab qhov xav tau ntawm qhov roughness.
Cov pa roj carbon steel qib 45 thiab 50 muaj qee lub zog thiab hnav tsis kam, thiab feem ntau siv los ua cov khoom pwm tom qab quenching thiab tempering kho. High carbon Tool steel thiab low alloy Tool 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, siab carbon Tool steel tsuas yog tsim rau kev tsim cov khoom me me thiab yooj yim zoo li qhov vim nws qhov loj deformation thaum kho cua sov.
Nrog rau txoj kev loj hlob ntawm kev lag luam yas, qhov nyuaj thiab precision ntawm cov khoom yas yog nce siab, thiab cov kev xav tau siab dua kuj tau muab tso rau pem hauv ntej rau cov khoom pwm. Rau cov yas pwm uas nyuaj, meej thiab corrosion-resistant, prehardening steel (xws li PMS), corrosion resistant steel (xws li PCR) thiab low-carbon Maraging steel (xws li 18Ni-250) tuaj yeem siv, tag nrho cov no muaj kev txiav zoo, kev kho cua sov, polishing zog thiab siab zog.
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. Nyob rau hauv cov xwm txheej tshwj xeeb, ib sab tuaj yeem coated lossis nitrided kom ob sab muaj cov qauv sib txawv.