I. Cov ntsiab lus xaus
Kauv welded kav thiab ncaj seam welded kav yog ob hom loj welded steel kav. Qhov sib txawv tseem ceeb nyob rau hauv cov duab ntawm cov weld (kauv vs. ncaj seam), uas ua rau muaj kev hloov pauv tseem ceeb hauv cov txheej txheem tsim khoom, cov khoom siv raw, cov yam ntxwv ntawm cov khoom, thiab daim ntawv thov. Feem ntau:
- Spiral welded kav:Nrog rau qhov zoo ntawm txoj kab uas hla loj, siab zog, thiab haum rau siab -xwm txheej, lawv tsim nyog rau cov roj thiab roj tsheb thauj mus los thiab loj - nplai structural engineering;
- Ncaj seam welded yeeb nkab:Nrog rau kev ua haujlwm siab, tus nqi qis thiab hloov pauv raws li nws cov txiaj ntsig tseem ceeb, nws yog qhov tsim nyog rau nruab nrab thiab me me - loj diameters, qis - kev thauj mus los ntawm cov kua dej thiab cov xwm txheej dav dav.
II. Tshwj xeeb txawv thiab yam ntxwv
1. Qhov sib txawv ntawm cov txheej txheem ntau lawm
• Kauv welded yeeb nkab:
Cov txheej txheem muaj cov kauv dabtsi yog khoov ua ke nrog ob -sided submerged arc vuam. Lub steel sawb kauj yog dov rau hauv ib lub raj kauv dawb paug los ntawm lub tshuab kauv, thiab tom qab ntawd welded rau ob sab hauv thiab sab nrauv siv submerged arc vuam. Qhov ntev ntawm qhov vuam yog kwv yees li 1.3-1.6 npaug ntawm lub voj voog ntawm cov yeeb nkab (uas yog, 30% -100% ntev tshaj qhov ncaj seam yeeb nkab).
Cov txheej txheem tseem ceeb:Hlau sawb straightening → Kauv txoj kev → Sab hauv thiab sab nrauv submerged arc vuam → Ultrasonic kuaj → Hydraulic test.
Nta:Tshwj xeeb kauv txoj kev tshuab yuav tsum tau, cov txheej txheem ntau lawm yog ntev, thiab siab precision nyob rau hauv txoj kev yog xav tau.
• Ncaj seam welded yeeb nkab:
Cov txheej txheem cuam tshuam ncaj qha bending thiab vuam cov txheej txheem (xws li JCOE kev tsim thiab siab -frequency resistance welding). Lub steel sawb los yog phaj yog ncaj qha dov mus rau hauv ib tug cylindrical zoo thiab ces welded raws lub ncaj seam siv submerged arc vuam (LSAW) los yog siab - zaus kuj welding (ERW). Lub weld ntev yog sib npaug rau qhov ncig ntawm cov yeeb nkab (qhov luv tshaj).
Cov txheej txheem tseem ceeb:Strip straightening → Ncaj seam txoj kev → Vuam (submerged arc / siab- zaus) → Kev tshuaj xyuas → Diametric ntsuas.
Nta:Cov txheej txheem ntau lawm yog qhov yooj yim, qhov ntws yog luv, thiab kev ua haujlwm siab (piv txwv li, qhov ceev ntawm ERW units tuaj yeem ncav cuag 10-20 m / min).
2. Qhov txawv ntawm Raw Material Requirements
• Kauv welded yeeb nkab:
Cov ntaub ntawv tseem ceeb yog kub- dov coil daim hlau (xws li Q235B, X70/X80 pipeline steel). Txij li cov txheej txheem muab kauv yuav tsum muaj qhov tseem ceeb khoov kev nyuaj siab, lub plasticity, toughness thiab nto zoo ntawm cov hlau phaj yuav tsum siab dua (xws li cov ntsiab lus qis dua, zoo dua weldability).
• Ncaj seam welded yeeb nkab:
Cov khoom siv raw tuaj yeem yog kub- dov steel strips, steel phaj lossis txias-rolled steel strips (xws li Q195, Q235, Q345). Lub plasticity yuav tsum tau rau cov ntaub ntawv raw yog me ntsis qis (tshwj xeeb tshaj yog rau siab -frequency resistance welded kav, thinner steel strips yuav haum).
3. Qhov txawv ntawm cov khoom nta
| Qhov ntev | Spiral welded yeeb nkab, | Ncaj seam welded yeeb nkab |
| Vuam seam shape | Kauv cov duab, nrog ntev weld ntev (1.3 - 1.6 npaug ntawm qhov ncig) | Ncaj zoo, nrog luv weld ntev (sib npaug rau qhov ncig) |
| Lub zog thiab rigidity | Kauv welds faib kev ntxhov siab, nrog ntau dua tag nrho compressive thiab khoov lub zog | Kauv welds mloog zoo rau kev ntxhov siab, nrog me ntsis qis zog (tab sis siab dua cov kav dej seamless) |
| Txoj kab uas hla | Muaj peev xwm ua tau loj diameters (Φ219 - 3660mm) | Haum rau cov kab nruab nrab thiab me me (Φ20 - 610mm) |
| Ntau lawm efficiency | Tsawg (slow kauv sib sau ceev, kwv yees li 5 - 10m/min) | Siab (siab- zaus kuj vuam tuaj yeem ncav cuag 20 - 40m / min) |
| Nqi | Lower (tsim loj diameters nrog nqaim sawb hlau, siab siv cov khoom siv) | Lower ( txheej txheem yooj yim, luv ntws) |
4. Qhov txawv ntawm daim ntawv thov teb
• Kauv welded yeeb nkab:
Vim nws txoj kab uas hla loj, siab zog thiab siab ua hauj lwm yam ntxwv, nws yog tsuas yog siv rau:
- Roj thiab roj tsheb thauj mus los (xws li Sab Hnub Poob- mus rau-Tebchaws Gas Pipeline, siv X70/X80 qib kauv welded kav);
- Loj - nplai cov qauv kev tsim vaj tsev ua haujlwm (xws li cov choj hauv paus piles, wharf walkways, thiab siab- nce lub tsev steel qauv);
- Kev xa dej (xws li cov kav dej loj ntawm Sab Qab Teb - mus rau -North Water Diversion Project).
• Ncaj seam welded yeeb nkab:
Vim nws cov specifications saj zawg zog thiab tus nqi qis, nws yog tsuas yog siv rau:
- Tsawg- kev thauj mus los ntawm cov kua dej siab (xws li cov dej hauv nroog thiab cov kav dej, cov kav dej, siv Q235B ncaj seam kav);
- General structural engineering (xws li kev tsim kho scaffolding, tsheb kauj vab racks, rooj tog txhawb nqa);
- Mechanical manufacturing (xws li automotive kis tau tus mob shafts, lub cev muaj zog vaj tse).
III. Cov ntsiab lus
Kev xaiv ntawm kauv welded kav thiab ncaj seam welded kav yuav tsum tau txiav txim raws li cov kev cai tshwj xeeb ntawm qhov scenario (inch, siab, lub zog):
- Yog tias xav tau ib txoj kab loj loj, kev kub siab, thiab lub zog siab (xws li kev thauj mus los ntawm cov roj thiab roj), ces cov kav dej welded yuav tsum tau xaiv.
- Yog tias koj xav tau qhov nruab nrab thiab me me - cov kav dej me me uas tsis tshua muaj siab thiab tus nqi qis (xws li hauv cov kav dej hauv nroog lossis cov qauv dav dav), xaiv lub pob tw -welded kav.
Qhov sib txawv ntawm cov txheej txheem thiab cov khoom siv raw ntawm ob yog tag nrho cov nyob ib puag ncig ntawm "welding seam shape", thiab thaum kawg ua haujlwm rau cov kev xav tau ntawm cov ntawv thov sib txawv.
