Kev Npaj Ua Haujlwm Ua ntej Steel Structure Installation Thiab Vuam

Cov khoom siv hlau kuaj suav nrog Q345GJC-Z15 (phab ntsa thickness 70mm), Q345GJC-Z15 (phab ntsa thickness 40mm), thiab Q345C (flange thickness 28mm). Vuam txoj haujlwm suav nrog kem-rau-kem kab rov tav vuam, kem- mus rau- nqaj tiaj vuam (xws li tiaj vuam ntawm sab sauv thiab qis flanges ntawm lub nqaj nqaj), thiab T- sib koom ua ke welding. Daim ntawv zawj thiab qhov ntev tau ua raws li cov qauv tsim. Tom qab dhau kev kuaj pom thiab ultrasonic, cov qauv raug coj mus kuaj rau txhua yam thiab lub cev.

Cov txiaj ntsig kev ntsuas tau pom tias lub zog tensile ntawm cov pob qij txha tau mus txog tus qauv tus nqi ntawm lub hauv paus hlau lub zog tensile, thiab cov pob qij txha tsis pom qhov tawg tom qab khoov 180 degree. Cov khoom siv vuam thiab cov cuab yeej siv tau ua raws li lub teb chaws cov qauv thiab muaj kev ua tau zoo heev. Kev tshem tawm slag, khawb, thiab electrode ziab thiab rwb thaiv tsev cov cuab yeej ua tiav thiab siv tau.

 

Manual Arc Welding thiab CO₂Gas Shielded Vuam cov ntaub ntawv thiab khoom siv
(1) Electrodes yuav tsum tau qhuav nyob rau hauv ib tug siab - kub kom qhuav qhov cub. Tus naj npawb ntawm lub sij hawm electrodes qhuav yuav tsum tsis pub tshaj ob.
(2) Vuam xaim ntim yuav tsum tsis txhob muaj. Yog tias puas, ua rau muaj kab mob sib kis, khoov, lossis cuam tshuam ntawm cov vuam hlau, qhov cuam tshuam yuav tsum muab pov tseg.
(3) Lub purity ntawm CO₂roj yuav tsum tsis pub tsawg tshaj 99.9% (los ntawm ntim), thiab cov ntsiab lus dej yuav tsum tsawg tshaj li 0.05% (los ntawm qhov hnyav). Kev siv yuav tsum tau nres thaum lub siab siab hauv lub tog raj kheej qis dua 1 MPa.
(4) Lub vuam tshuab hluav taws xob yuav tsum yog qhov qub, cov xaim hauv av yuav tsum nruj nruj thiab ruaj khov, cov cables thiab cov hlua vuam yuav tsum tsis muaj kev puas tsuaj, cov xaim feeder yuav tsum pub xaim sib npaug, thiab cov yeeb nkab roj yuav tsum tsis txhob xau lossis thaiv.

 

Installation Vuam txheej txheem thiab cov kev cai dav dav
Cov txheej txheem vuam dav dav yog: Ua ntej- kev tshuaj xyuas vuam → Preheating thiab xeb tshem tawm → Kev teeb tsa ntawm cov phaj nraub qaum thiab arc striking daim hlau → Vuam → Tshuaj xyuas
1. Ua ntej vuam, tshuaj xyuas qhov zawj lub kaum sab xis, lub ntsej muag hauv paus, qhov sib txawv, thiab qhov tsis zoo. Xeb, roj stains, thiab zeb nplai ntawm qhov zawj thiab hauv 100 hli ntawm ob sab yuav tsum tau ntxuav kom huv si.
2. Preheating. Ua ntej vuam, lub hauv paus hlau tsis pub dhau 100 hli ntawm qhov zawj thiab ntawm ob sab yuav tsum tau ua kom zoo sib xws siv roj vuam lossis lub teeb tshwj xeeb, thiab qhov ntsuas kub yuav tsum tau ntsuas nrog lub ntsuas kub saum npoo kom tiv thaiv qhov kub tsis tau raws li qhov xav tau lossis ua rau thaj chaw oxidation. Preheating kub ...
3. Rov xyuas qhov kub thiab txias; yog tias qhov kub tsis txaus, rov ua kom tau raws li qhov yuav tsum tau ua.
4. Txhim kho lub nraub qaum daim hlau thiab arc striking daim hlau. Qhov yuav tsum tau ua kom huv si yog tib yam li cov rau ntawm qhov zawj. Cov phaj rov qab yuav tsum tau nruj nreem haum rau lub hauv paus hlau, thiab cov arc striking daim hlau yuav tsum tau ruaj ntseg welded rau lub hauv paus hlau.
5. Welding: Thawj weld dhau yuav tsum kaw qhov kev sib txuas ntawm lub hauv paus hlau thiab cov phaj nraub qaum hauv qhov zawj. Tom qab ntawd, weld txheej los ntawm txheej kom txog thaum lub groove puv. Tom qab txhua qhov vuam dhau, slag thiab spatter yuav tsum tau muab tshem tawm. Weld tsis xws luag yuav tsum tau muab tshem tawm thiab kho tam sim ntawd.
6. Txhua qhov sib txuas yuav tsum tau welded tsis tu ncua. Yog tias vuam yuav tsum tau nres ib nrab, kev rwb thaiv tsev thiab kev kho cua txias yuav tsum tau ua. Ua ntej rov pib vuam, rov ua dua raws li cov cai.
7. Kev vuam yuav tsum tau nres thaum los nag lossis daus. Cov cua ntsawj ntshab thiab cov nag los nag yuav tsum tau muab nyob ib puag ncig thiab saum toj ntawm cov khoom sib txuas. Vuam yuav tsum nres thaum cua ceev tshaj 5 m/s. Thaum qhov kub ntawm qhov chaw nyob qis dua xoom degrees Celsius, preheating thiab post- ntsuas cua sov yuav tsum tau ua raws li cov cai.
8. Rau carbon structural steel, weld flaw detection yuav tsum tau ua tom qab lub weld txias rau ambient kub; rau qis- alloy structural steel, nws yuav tsum tau ua 24 teev tom qab ua tiav.
9. Welders thiab inspectors yuav tsum ua tib zoo sau cov ntaub ntawv ua haujlwm.

 

Vuam Sequence thiab txheej txheem Parameters rau hom Joints
(1) Rau sab sauv thiab sab qis tsis muaj pob ntseg daim hlau, ob lub vuam vuam sib txuas ntawm ob sab kom txog thaum 1/3 ntawm cov phaj tuab, ces txiav tawm pob ntseg daim hlau.
(2) Tom qab ntawd, ob lub vuam vuam symmetrically ntawm ob sab ntawm qhov txiav - tawm pob ntseg phaj sab mus txog 1/3 ntawm lub phaj tuab.
(3) Tom qab ntawd, ob lub vuam vuam txhua tus ua haujlwm vuam ntawm ob sab uas nyob ib sab.
(4) Cov pob qij txha ntawm cov vuam hla ntawm txhua ob txheej yuav tsum tau staggered. Cov pob qij txha ntawm ob lub welder yuav tsum tau staggered nyob rau hauv txhua txheej. Lub interpass kub yuav tsum tau saib xyuas thaum lub sij hawm vuam txheej txheem. (5) Welding Process Parameters:
CO2 shielded arc vuam: vuam hlau txoj kab uas hla Φ1.2mm, tam sim no 280-320A, vuam ceev 350-450mm / min
Vuam hlau txuas ntev: kwv yees li 20mm, roj ntws tus nqi 25-80L / min,
Voltage 29-34V, interpass kub 120-150 degree

 

Kem-Beam thiab Beam-Beam Joints
(1) Weld qis flange ntawm lub beam ua ntej, kom ntseeg tau tias symmetrical vuam ntawm flange welds ntawm ob sab ntawm lub web beam.
(2) Tom qab lub flange qis yog welded, ces weld lub sab flange.
(3) Yog hais tias lub flange phaj thickness yog ntau tshaj 30 hli, nws yog advisable rau alternate vuam ntawm lub sab sauv thiab qis flanges.
(4) Welding Process Parameters:
CO2 shielded arc vuam: vuam hlau txoj kab uas hla φ1.2mm, tam sim no 280-360A, vuam ceev 300-500mm / min
Vuam hlau txuas ntev li ntawm 20 hli, roj ntws tus nqi 20-80L / min
Voltage 30-38V, interpass kub 120-150 degree

 

Kev tsim khoom
Kev ua thiab kev tsim khoom ntawm cov khoom siv steel qauv zoo ib yam li cov qauv hlau precision, poob ntawm cov khoom siv zoo tib yam (nrog rau kev ua haujlwm tsawg) thiab kev ua haujlwm siab (yuav tsum tau ua tiav), siv vuam lossis bolted sib txuas.
Nyob rau tib lub sijhawm, cov qauv tseem ceeb ntawm cov hlau muaj xws li: cov qauv tsim rau cov tsev tsim khoom, cov qauv tsim rau ntau- cov tsev dab neeg, thav duab- shear phab ntsa, thav duab- cov qauv raj, cov kab sib chaws tiaj tus thiab cov kab sib chaws ru tsev kab sib chaws rau cov chaw loj, thiab lwm yam. Lub tsev sib txawv yuav tsum muaj cov qauv sib txawv. Steel qauv tsim yuav tsum ua raws li lub teb chaws technical specifications, kom ntseeg tau tias advanced technology, economic rationality, kev nyab xeeb thiab practicality, thiab kev ruaj ntseg zoo. Yog li ntawd, cov kev cai hauv qab no yuav tsum tau sau tseg thaum lub sij hawm tsim thiab tsim khoom:
1. Ua ntej, xaiv cov txheej txheem tsim nyog thiab tsim nyog raws li lub tsev tsim nyog ua haujlwm. Ua kom cov thev naus laus zis siab, cov qauv tshiab, thiab kev sib koom ua ke ntawm architecture thiab qauv.
2. Cov qauv hlau (tshwj tsis yog cov thawv ntim) feem ntau yog tsim los ntawm cov tswv cuab, yog li qhov ntev ntawm cov tswv cuab yuav tsum tau ua qauv thiab hloov kho kom ntau li ntau tau los pab txhawb kev tsim khoom, kev thauj mus los, thiab kev teeb tsa, thiab txhim kho cov khoom tsim tau.
3. Siv high-cov hlau ua tau zoo nrog cov ntsuas kev lag luam siab. 4. Cov pob qij txha hauv cov qauv steel yog qhov tseem ceeb; txoj kev sib txuas tsim nyog yuav tsum tau siv los xyuas kom meej tias qhov kev sib koom ua ke tsim raws li cov qauv yooj yim uas siv hauv kev suav cov qauv. Keeb kwm, feem ntau ntawm cov txheej txheem tsis ua haujlwm tau tshwm sim ntawm cov pob qij txha, yog li ua tib zoo tsim thiab tsim cov pob qij txha yog qhov tseem ceeb, siv cov kev sib txuas siab thiab txhim khu kev qha.