Porosity yog ib qho teeb meem tshwm sim nyob rau hauv cov txiv ntoo projection welding, ua rau tsis muaj zog welds. Hauv tsab xov xwm no, peb yuav muab cov lus qhia dav dav ntawm ntau yam kev daws teeb meem los daws qhov porosity hauv cov txiv ntoo projection vuam. Los ntawm kev siv cov tswv yim no, cov neeg ua haujlwm tuaj yeem txo qhov tshwm sim ntawm qhov porosity thiab ua kom cov welds muaj zog.
- Kev Npaj Nto: Kev npaj kom zoo yog qhov tseem ceeb los txo qhov porosity hauv cov txiv ntoo projection vuam. Ua ntej vuam, nws yog ib qho tseem ceeb kom huv si ntxuav cov mating qhov chaw ntawm cov txiv ntseej thiab workpiece kom tshem tawm tej yam kab mob, xws li roj, av, los yog oxides. Qhov no tuaj yeem ua tiav los ntawm kev ntxuav cov kuab tshuaj, txhuam hlau, los yog abrasive blasting. Qhov chaw huv si txhawb kev sib txuas zoo dua thiab txo qhov kev pheej hmoo ntawm porosity tsim.
- Kev xaiv electrode: Kev xaiv ntawm vuam electrodes tuaj yeem cuam tshuam qhov porosity tsim. Nws raug nquahu kom siv cov khoom siv hluav taws xob ua los ntawm cov khoom siv hluav taws xob uas muaj hluav taws xob zoo thiab tsis tshua muaj zog, xws li tooj liab lossis tooj liab alloys. Cov electrodes no muab cov cua sov zoo dua thiab txo qhov kev pheej hmoo ntawm cov pa nkag, txo qhov tsim ntawm porosity.
- Vuam Parameters Optimization: Optimizing vuam tsis yog qhov tseem ceeb los txo qhov porosity. Tsis muaj xws li vuam tam sim no, lub sij hawm, thiab lub siab yuav tsum tau ua tib zoo kho kom ua tau zoo vuam zoo. Kev siv vuam tsis txaus lossis lub sijhawm vuam tsis txaus tuaj yeem ua rau cov cua sov tsis txaus, ua rau cov porosity. Conversely, ntau welding tam sim no los yog lub sij hawm ntev welding tuaj yeem tsim cov cua sov ntau dhau, vaporizing cov khoom thiab ua rau porosity. Nrhiav qhov sib npaug yog qhov tseem ceeb los txo qhov porosity.
- Gas Shielding: Qee zaum, kev siv cov roj thaiv kev tiv thaiv tuaj yeem pab txo qhov porosity. Shielding gases, xws li argon los yog helium, tsim ib qho chaw tiv thaiv nyob ib ncig ntawm lub weld cheeb tsam, tiv thaiv ingress ntawm atmospheric gases uas yuav pab tau rau porosity. Qhov no yog qhov tshwj xeeb tshaj yog thaum vuam cov ntaub ntawv reactive los yog nyob rau hauv ib puag ncig uas muaj cov kab mob atmospheric siab.
- Electrode Maintenance: Kev saib xyuas tsis tu ncua ntawm vuam electrodes yog qhov tseem ceeb los tiv thaiv porosity. Nyob rau tib lub sijhawm, electrodes tuaj yeem ua paug lossis hnav, ua rau tsis zoo rau kev hloov pauv cua sov thiab nce porosity. Nws yog ib qho tseem ceeb uas yuav tsum tau ntxuav thiab tshuaj xyuas cov electrodes tsis tu ncua, tshem tawm cov kab mob los yog oxidation. Tsis tas li ntawd, hloov cov electrodes hnav ua kom zoo ib yam thiab txo qhov kev pheej hmoo ntawm porosity.
- Vuam Technique: Cov txheej txheem vuam zoo ua lub luag haujlwm tseem ceeb hauv kev txo qhov porosity. Cov neeg ua haujlwm yuav tsum ua kom muaj kev sib raug zoo ntawm cov txiv ntoo thiab cov khoom ua haujlwm, tswj kev ruaj khov thaum lub sij hawm vuam, thiab tsis txhob muaj zog electrode ntau dhau los yog txav ceev. Cov txheej txheem vuam zoo sib xws thiab tswj tau pab txo qhov porosity thiab tsim cov vuam zoo.
Porosity nyob rau hauv cov txiv ntoo projection welding tuaj yeem cuam tshuam qhov kev ncaj ncees thiab lub zog ntawm cov welds. Txawm li cas los xij, los ntawm kev ua raws li cov kev daws teeb meem tau teev tseg hauv tsab xov xwm no, cov neeg ua haujlwm tuaj yeem txo cov teeb meem porosity zoo. Ua raws li kev npaj saum npoo, xaiv cov electrodes uas tsim nyog, ua kom zoo dua cov vuam tsis zoo, siv cov roj tiv thaiv, tswj cov electrodes, thiab siv cov txheej txheem vuam tsim nyog yog cov kauj ruam tseem ceeb los txo qhov porosity thiab ua kom muaj zog thiab txhim khu kev qha welds hauv cov txiv ntoo projection vuam daim ntawv thov.
Post lub sij hawm: Lub Xya hli ntuj-10-2023
