1. Cov kev tsim tawm rau kev ntom ntom zoo ntawm cov hluav taws xob tawg
Qhov yuav tsum tau ua kom zoo tshaj plaws rau cov pov thawj ntawm cov hlau nplaum uas yuav tsum tau ua raws li nram qab no: Cov kev kho mob saum npoo yuav tsum ua kom tau raws li qhov yuav tsum tau ua, tsis muaj cov xuab zeb ntawm cov xuab zeb yuav tsum tau muab tshem tawm tom qab muab cov khoom pov tseg, thiab cov teeb meem ntawm cov castings xws li pores, lub qhov ntswg, qhov ncauj tawm hauv qhov ntswg, thiab lub qhov ntswg ntawm qhov dej yuav tsum tsis pub tshaj qhov yuav tsum tau ua. Qhov tob ntawm qhov kev tsis txaus siab yuav tsum tsis pub tsawg dua qhov kev txiav nyiaj, qhov tsis muaj kev txwv, tsis tas siv cov khoom tsim tawm, qhov tob ntawm qhov defect yuav tsum tsis pub tsawg dua qhov kev txiav nyiaj, qhov chaw tsis txwv, kev ua haujlwm yuav tsum ua kom tau raws li qhov yuav tsum tau ua, tsis muaj kab nrib pleb thiab sib cais sib cais, kev ua Cov kev puas tsuaj yog tsis muaj kab tom qab ua tiav.
2. Lwm yam kev xav tau
Lub vuam tshuab rooj ntawm qhov tawg phom ntev uas muaj hlau nplaum tas li tshawb xyuas seb lub vuam voos puas muaj teeb meem xws li cov qhov hauv av, undercuts, inclusions, vuam ntws thiab ntom ntsa; qhov tseem ceeb tsis zoo xws li tshuab lub hauv paus, lub hau npog, npog kabmob thiab lub thawv ntim yuav tsum tau ua raws li cov kev cai ntawm kev kos duab. Muaj kev tshuaj ntsuam xyuas thiab ntaub ntawv pov thawj hluav taws xob pov tseg hluav taws xob pov khoom hluav taws xob los yog pov thawj hluav taws xob; Yog hais tias kev yuav khoom ntawm tawg tawg qes casing yog siv rau peb lub Hoobkas kev ruaj ntseg daim ntawv pov thawj los yog cov khoom tsim tawm, nws yuav tsum raug lees paub tias nws muaj raws li qhov yuav tsum tau ua rau kev lees paub cov khoom tsim nyog.
