Teeb meem ua los ntawm kev sib txhuam thiab hnav cov khoom kho tshuab
Apr 08, 2018| 1. Kev sib txhuam
Kev sib txhuam yog qhov phenomenon ntawm kev sib nruam obstructions ntawm cov chaw uas txav khoom. Kev sib txhuam tau muab faib ua cov pawg hauv qab no :
(1) Sab Hauv Kev Sib Txhuam: Qhov tshwm sim ntawm cov kev sib cav txhim kho ntawm cov xaim hluav taws xob uas tshwm sim hauv ib yam khoom.
(2) Sab Nraud Kev Sib Txhuam: Qhov tshwm sim ntawm kev sib nrig sib nruam uas tshwm sim ntawm cov chaw ntawm cov khoom txav.
(3) Cov kev sib tw uas tsis sib xws: Kev sib txhuam nkaus xwb nyob rau hauv kev sib hais.
(4) Kev sib txhuam los ntawm txoj hlua: Kev sib txhuam hauv kev ntsuas.
(5) Kev sib xyaw kev sib tw: Daim ntawv ntawm cov suab ntawm cov khoom ntawm qhov khoom yog kev sib txheeb ntawm kev sib txhuam.
(6) Dov lus sib dhos: Daim ntawv ntawm cov lus tsa suab nruab nrab ntawm cov khoom ntawm cov khoom yog txheeb ze kev sib txhuam.
2. Coj
Hnav yog poob lossis hloov cov ntaub ntawv ntawm qhov khoom ntawm qhov khoom tawg vim kev sib txhuam, uas tuaj yeem ua rau lub tshuab ua haujlwm, txo qhov kev cia siab ntawm cov haujlwm workpiece, thiab ua rau lub tshuab yuav tsum muab khawb ua ntej.
Mechanical coj tau muab faib ua peb theem:
Cov kauj khiav hauv theem - qhov tshiab yog feem ntau nyob rau qib no thaum pib siv, nrog rau kev siv nyiaj siab.
Lub ruaj khov nyob rau theem - yog nyob rau ntawm kev ua haujlwm ua haujlwm ntawm qhov chaw, thiab kev hnav cov khwv yees tsis ruaj khov thiab tsawg.
Qhov mob hnyav heev - theem ntawm qhov chaw yuav raug khawb, thiab kev hnav yuav nce siab.
Peb theem ntawm hnav yog qhia nram qab no:
Raws li kev cais ntawm txoj kev hnav khaub ncaws, nws tuaj yeem ua raws li:
1. Pov lub tsho, lossis hnav, yog qhov khoom uas ua los ntawm sab nrauv ntawm cov tawv dawb los yog cov kab ntsig ntawm cov tawv nqaij.
2. Qaug zog hnav, tseem hu ua pitting, yog kev hnav los ntawm kev nkees ntawm khoom siv los ntawm dua deformation ntawm micro-ntim ntawm kev sib txhuam ntawm cov khoom ntog hauv kev nqis tes ntawm kev sib hloov kev sib tw.
3. Hnav hnav, uas tseem hu ua gluing, tshwm sim thaum lub qhov taw qhia ntawm qhov sib txawv ntawm qhov "txias welds" ntawm ntau cov ntsiab lus ntawm kev sib raug zoo vim kev kub ntxhov siab thiab kev ntxhov siab. Thaum lub sij hawm nyhav dhau los, cov khoom siv los ntawm ib qhov chaw mus rau lwm qhov, thiab tom qab ntawd cov ntaub nplaum ua ke.
4. Hlawv phom, phom sij ntawm cov tshuaj phom los sis cov khoom siv hauv cov kua dej, qhov hnav ua los ntawm lub zog ntawm qhov dej ntawm qhov kev sib txhuam ntawm qhov tsis sib haum;
5. Corrosion hnav, thaum cov khoom siv pob txha los ntawm qhov khoom tawg ua rau qis los ntawm cov tshuaj chemical lossis electrochemical nkaus ntawm qhov chaw, qhov hnav ua los ntawm kev sib txheeb ntawm kev sib txheeb ntawm kev sib txhuam kev sib txhuam yog kev txhim khu.
6. Kev hnav txhawm rau yog hais txog kev hnav ua ke los ntawm cov cuab yeej saum toj no hais thaum tus txhuam kev sib tw txav me ntsis, thiab cov suab paj nruag kuj to taub raws li qhov kev sib txheeb ntawm tus txheeb ze uas tsis txaus los cais cov khoom tawg ntawm kev sib txhuam kev sib txhuam.
Cov kev sib txhuam ntawm cov khoom sib txuas ua haujlwm yog universal thiab unavoidable. Kev sib txhuam ua rau kub, kub sawv thiab poob lub zog ua rau poob thiab hloov khoom siv ntawm qhov chaw ntu (uas yog ua rau kev sib txuas ntawm qhov hnyav). Hnav ua rau qhov zoo thiab qhov loj ntawm cov khoom yuav raug puas tsuaj, uas txo cov kev ua haujlwm thiab kev cia siab ntawm lub tshuab kom txog thaum nws poob nws qhov kev ua tau zoo.