Cov txheej txheem tsim khoom ntawm cov khaub thuas- taub hau feem ntau suav nrog cov kauj ruam hauv qab no:
- Raw Material Preparation: Xaiv cov hlau uas tsim nyog, feem ntau yog carbon steel, alloy steel, lossis stainless hlau. Txoj kab uas hla yuav tsum tau txiav txim siab raws li qhov kawg ntawm cov khoom loj. Cov hlau yuav tsum tau annealed los txhim kho nws cov yas, yooj yim rau kev ua haujlwm tom ntej.
- Cold Heading: Pub cov xaim mus rau hauv lub tshuab taub hau txias, qhov twg nws ua rau cov yas deformation ntawm chav tsev kub siv pwm. Lub tshuab taub hau txias siv ntau- chaw nres tsheb pwm kom maj mam ua ib feem. Cov chaw nres tsheb feem ntau suav nrog kev txiav, ua ntej- sib sau, thiab ua tiav kawg. Piv txwv li, bolt lub taub hau tsim yuav xav tau 3-5 chaw nres tsheb, nrog lub siab ntau ntawm 50-200 tons.
- Threading: Rau cov khoom uas xav tau cov xov (xws li bolts), threads yog ua tiav siv lub xov dov tshuab lossis xov dov zeb. Cov xov dov ceev yog pom zoo kom tswj tau ntawm 100-300 rpm kom paub meej xov raug thiab nto zoo.
- Kev kho cua sov: Ua kom quenching thiab tempering kho (xws li quenching + tempering) raws li cov khoom siv thiab cov kev xav tau los txhim kho lub zog thiab hardness. Piv txwv li, carbon steel qhov chaw yuav quenched ntawm 850-900℃thiab ces tempered ntawm 400-600 degree.
- Kev Kho Hniav: Cov txheej txheem muaj xws li electro-galvanizing, kub-dip galvanizing, thiab Dacromet txheej los txhim kho corrosion. Lub thickness ntawm cov kub -dip galvanized txheej yog feem ntau 40-80μm, thiab cov immersion kub yuav tsum tau tswj nyob ib ncig ntawm 450 degree.
- Kev tshuaj xyuas thiab ntim: Qhov ntev, hardness, torque, thiab lwm yam, raug kuaj. Tom qab kev soj ntsuam dhau lawm, cov khoom raug ntim raws li qhov yuav tsum tau ua (xws li, hauv lub thawv lossis lub hnab).
