Kev tsim thiab tsim cov pwm yooj yim yog qhov yooj yim

(1) Cov qauv yog qhov yooj yim los yog tshwj xeeb, tsim thiab tsim khoom yog qhov yooj yim, thiab tsis tas yuav tsum muaj cov cuab yeej ua haujlwm siab thiab hluav taws xob;
(2) Lub voj voog tsim thiab kev tsim khoom yog luv luv, feem ntau tsuas yog 1/3 txog 1/10 ntawm cov pwm ua los ntawm kev siv tshuab thiab kev ua hluav taws xob;
(3) Cov khoom siv pwm tsawg dua yog siv, yog li qhov hnyav ntawm pwm yog qhov sib zog dua li cov pwm zoo sib xws;
(4) Tus tsim thiab tsim cov nqi qis, tsuas yog ob peb feem kaum ntawm cov pwm zoo sib xws ua tiav los ntawm machining thiab hluav taws xob ua haujlwm;
(5) Cov khoom lossis cov khoom uas tuaj yeem tsim tau (lossis luam tawm) cov khoom tshwj xeeb zoo li qhov chaw thiab cov qauv uas tsis tuaj yeem tsim los ntawm cov qauv hlau pwm;
(6) Nws muaj peev xwm tshawb nrhiav kev paub ua ntej hauv kev tsim cov pwm thiab cov pa hlau loj loj los ntawm kev ua haujlwm thiab kev siv hluav taws xob, txo lossis zam cov kev pheej hmoo hauv kev tsim thiab tsim cov pwm, thiab txhim kho lossis ua kom lawv cov txiaj ntsig tau zoo;
(7) Nws yog siv dav, thiab txhua qhov chaw ntawm lub neej tuaj yeem xaiv los txais yuav raws li lawv tus kheej cov khoom yuav tsum tau ua thiab cov xwm txheej;
(8) Lub rigidity ntawm hom pwm no feem ntau tsis zoo, lub zog thiab hardness yog tsawg, thiab creep deformation yog feem ntau tshwm sim tom qab siv mus ntev;
(9) Qhov saum npoo roughness yog qhov siab, qhov tseeb ntawm cov duab thiab qhov loj me yog qhov tsawg, thiab kev hnav thiab tsim kua muag thaum siv mus ntev muaj qee qhov cuam tshuam rau qhov roughness thiab precision ntawm cov khoom;
(10) Lub neej kev pab cuam feem ntau luv dua li cov pa hlau pwm;
(11) Qee cov pwm tsis tuaj yeem siv nrog qee yam khoom siv. Piv txwv li, plaster wax pwm tsis tuaj yeem ntsia tau rau ntawm cov tshuab siv tshuab siab.