Ncaj Seam Welded Yeeb Nkab Txheej Txheem

Ncaj seam welded kav yog steel kav tsim los ntawm dabtsi yog khoov steel daim hlau los yog steel strips thiab ces welding raws longitudinal axis. Lawv feem ntau muab faib ua ob txoj kev tsim khoom: ERW / HFW siab -frequency resistance welding (rau nruab nrab thiab me diameters) thiab LSAW ncaj seam submerged arc vuam (rau loj diameters thiab tuab phab ntsa). Ntawm no yog qhov ua tiav thiab cov ncauj lus kom ntxaws ntawm tag nrho cov txheej txheem tsim khoom.
 

1. Raw khoom txais thiab tshuaj xyuas
- Cov ntaub ntawv raw:Kub dov kauj (ERW), nruab nrab - tuab steel daim hlau (LSAW), cov ntaub ntawv xws li Q235, Q355, X42 rau X80 pipeline steel, thiab lwm yam.

- Kev tshuaj xyuas:

• - Txheeb xyuas daim ntawv pov thawj zoo (tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab)
• - Tag nrho cov phaj ultrasonic kuaj (phaj tshuaj xyuas): Tshawb xyuas cov txheej txheem sab hauv, suav nrog, thiab cov kab nrib pleb hauv cov hlau phaj.
• - Kev tshuaj xyuas qhov muag: Tsis muaj xeb, dents, khawb, lossis yoj-zoo li deformation.

2. Ua ntej-kev kho cov hlau phaj/steel strips
- ERW txheej txheem (steel strips):

1. Uncoiling: Uncoiling ntawm steel coils mus rau lub tshuab
2. Straightening: Ntau- cov menyuam ncaj tshuab kom tshem tawm cov kev ntxhov siab
3. Ntug txiav / milling: shearing los yog milling ntawm ob sab kom paub meej qhov dav thiab ncaj npoo
4. Ntug-rau- ntug vuam: Flash vuam ntawm lub taub hau thiab tus Tsov tus tw ntawm cov hlau sawb kom ua tiav kev tsim khoom tas mus li
5. Nyob coil cia: Buffering rau kev tsim khoom tas mus li

- LSAW Txheej Txheem (Steel Plate):

1. Txiav rau Ntev Ntev: Txiav cov hlau phaj raws li qhov ntev ntawm ib lub yeeb nkab.
2. Ntug Milling: Zeb ob sab, ua cov qauv bevels (xws li V-zoo li tus), tswj burrs thiab kaum.
3. Pre-bending: Siv lub tshuab ua ntej-bending ua ntej- khoov cov npoo ntawm lub phaj kom ntseeg tau tias kev sib koom ua ke zoo thiab tiv thaiv "pear- zoo li" deformation.
 

1. ERW/HFW High Frequency Vuam - Nruam Roll Forming
- Spindle kev npaj / Multi- sawv ntsug kev sib sau:

• Lub steel sawb undergoes 20 mus rau 36 txoj kev yob, maj mam hloov los ntawm daim ntawv → qhib yeeb nkab dawb paug → sib koom ua ke cov yeeb nkab
• Txoj kev ua ntu: Rough forming → Fine forming → Extrusion section
• Cov kev tswj tseem ceeb: Ntug kev sib tw, ntug sib txawv Tsawg dua lossis sib npaug ntawm 0.15t, ellipticity

2. LSAW Submerged Arc Vuam - JCOE/UOE Forming (Dov Loj)
- JCO Forming (Feem ntau siv):
1. J Forming: Ib nrab ntawm cov hlau phaj yog stepped stamped rau hauv J zoo li
2. C forming: Lwm ib nrab yog stamped rau hauv C zoo
3. O Forming: Tag nrho cov khoom tau koom ua ke los ua ib qho qhib -kho lub voj voog
4. Expansion (E): Tag nrho -ntev mechanical expansion kom qhov tseeb qhov loj thiab tshem tawm kev ntxhov siab sab hauv

1. ERW/HFW Siab -Vuam zaus Resistance (tsis muaj hlau muab tub lim)
- Lub hauv paus ntsiab lus: Siv siab- zaus tam sim no, cov nyhuv ntawm daim tawv nqaij + cov nyhuv sib thooj
- Ntug yog rhuab mus rau 1300-1500℃mus rau lub xeev molten
- Compression roller siv siab, forging thiab fusing los ua ib qho kev sib txuas ntawm cov khoom siv hlau
- Txheej txheem:
1. High- zaus vuam: induction / sib cuag hom siab- zaus vuam tshuab
2. Deburring: Scrapers nyob rau sab hauv thiab sab nraud ntawm lub weld seam tshem tawm weld spurs
3. Kev kho cua sov (optional): Nruab nrab- zaus annealing kom tshem tawm cov kev ntxhov siab welding

2. LSAW Straight Seam Submerged Arc Vuam (Ob chav-sided Multi- txheej)
1. Pre-welding (Kho Vuam): MAG gas shielded vuam rau nruam seam alignment
2. Inner Vuam: Multi-wire submerged arc vuam hauv cov yeeb nkab (1-4 xov hlau), nrog rab phom tsis siv neeg vuam
3. Sab nrauv Vuam: Multi-wire submerged arc vuam sab nraum cov yeeb nkab (1-4 xov hlau)
- Parameters: Tam sim no 500-1000A, Voltage 30-38V, Ceev 0.5-1.2m / min

1. Txias thiab txiav
- Cua- cua txias / Dej- cua txias rau chav sov
- Txiav rau qhov ntev (los ntawm ya saw / sawing)
2. Dimensional tiav
- ERW:
- Roundening/Constant Diameter Unit: Ua kom muaj qhov tseeb sab nraud
- Straightening: 2-4 yob straightening tshuab
- LSAW:
- Mechanical Expansion (E Txheej Txheem): Tag nrho -ntev nthuav dav, ellipticity Tsawg dua lossis sib npaug rau ± 0.5%D
- Pipe End Roundening, Flat Head Chamfering
3. Cov yeeb nkab kawg ua tiav
- Chamfering/Beveling: Tsim vuam bevels (30℃- 37.5℃) kom yooj yim ntawm - qhov chaw vuam
 

1. Kev Ntsuas Ultrasonic (UT)
- 100% kev tshuaj xyuas ntawm phaj tshuaj xyuas thiab vuam seams: tawg, kev nkag tsis tiav, slag suav nrog
2. X-ray/ -ray Testing (RT)
- 100% kev lag luam TV / kev yees duab ntawm weld seams, raws li API / GB qauv
3. Hydrostatic Test
- Kev ntsuam xyuas qhov siab: P=2St/D (S=yield zog, t =} phab ntsa thickness, D=inch)
- Ua kom siab li 5 mus rau 10 vib nas this, tsis muaj dej, tsis muaj deformation
4. Tsis yog -Kev Ntsuam Xyuas Kev Puas Tsuaj (NDT)
- Sib Nqus Particle/Phonon (MT/PT): nto tawg
5. Kev kuaj lub cev thiab tshuaj (Batch)
- Tensile, dabtsi yog khoov, cuam tshuam, metallographic, hardness
 

1. Kev kho deg
- Kev tshem tawm xeb: Tua blasting / Sandblasting (Sa2.5 qib)
- Kev tiv thaiv corrosion: Painting, Galvanizing, 3PE tiv thaiv - txheej txheej (Cov roj thiab cov kav dej)
2. Kev txheeb xyuas thiab ntim khoom
- Kos npe: Cov lus qhia tshwj xeeb, cov khoom siv, lub tshuab hluav taws xob, tus qauv, cov cim lag luam
- Ntim, hnyav, cia

- Tsim: Offset dimension, ellipticity, ntug alignment
- Vuam: Kub, extrusion quab yuam, ceev, vuam qhov siab
- Thaum tshav kub kub kho: Annealing kub, tuav lub sij hawm (stress nyem)
- Tsis yog-Kev kuaj kev puas tsuaj: 100% UT/RT, tsis muaj dej ntws hauv qab dej siab
- Expansion: Expansion rate 0.5% - 1.5% (LSAW)