I. Cov Ntsiab Lus Txhais
Square taub hau boltsyog cov fasteners nrog lub taub hau square thiab ib qho threaded sab nraud, tsis zoo li hexagonal bolts. Lawv cia siab rau ntawm plaub qhov chaw tiaj tus ntawm lub taub hau square kom koom nrog ib lub ciaj ntswj rau kev nro, thiab nruj nrog ib tug hexagonal los yog square txiv ntoo.
Thaum ntxov ntawm kev lag luam, square taub hau bolts yog cov khoom tseem ceeb; tam sim no, hexagonal bolts yog tsim rau cov khoom siv tsis siv neeg sib dhos, thaum lub taub hau lub taub hau square yog nyiam rau hnyav -lub luag haujlwm, sab nraum zoov, thiab kaw / dimly teeb ua haujlwm. Lub taub hau square muab qhov chaw clamping loj dua, txo cov ciaj ntswj slippage, tso cai rau kev siv lub zog nruj dua, thiab muab kev ntseeg siab ntau dua rau kev sib dhos thiab kev sib dhos.
II. Ua raws li International Standards
Lub teb chaws tus qauv: GB / T8 (Ordinary Square taub hau Bolts), GB / T35 (Me me Square taub hau Bolts)
German Standards: DIN478 (square taub hau bolts nrog flange), DIN479 (square taub hau bolts nrog luv luv qhia kawg), DIN 21346
Imperial: ASME ANSI B18.2.1, ASTM-A307, SAE J429 Qib 5 / Qib 8; Xov UNC, UNF specifications: 1/4 "-1-1/2".
III. Khoom thiab Qib Qib
1. Carbon hlau
-Qib 4.8 (Q235 low carbon steel): Cov khoom siv dav dav, laj kab, kev txhawb nqa; blackened, electro-galvanized;
- Qib 8.8 thiab 10.9 (45 # thiab 35CrMo alloy steel): railway, engineering machinery, steel qauv; mainstream rau hnyav- daim ntawv thov; Qib 10.9 thiab siab dua yuav tsum tau ci ntawm 190-230℃tom qab electroplating kom tshem tawm hydrogen embrittlement.
2. Cov khoom siv stainless hlau
-304 Stainless Hlau: Tsim nyog rau cov dej qab zib thiab siv sab nraum zoov;
-316 stainless hlau: muaj molybdenum, siv nyob rau hauv ntug hiav txwv dej thiab cov khoom siv tshuaj;
IV. Kev faib khoom
1.Standard square taub hau bolts DIN478 (nrog flange): nta ib tug thickened flange hauv qab lub taub hau, muab ib tug loj clamping cheeb tsam thiab tiv thaiv kev puas tsuaj rau casting nto; feem ntau siv hauv cov khoom siv mining thiab cam khwb cia hlau thav duab.
2.DIN479 Aub-Point Guide Head Bolt: Ib qho kev qhia luv luv ntawm lub hauv ntej kawg ntawm lub ntsia liaj qhov rooj, uas ua kom muaj kev sib haum xeeb nrog lub qhov los ntawm qhov thaum sib dhos; feem ntau siv nyob rau hauv cov khoom siv piping thiab flange sib dhos.
3.Tag nrho- xov square taub hau bolts / Ib nrab- xov square taub hau bolts: M6-M72, tiav specifications, metric coarse thiab zoo threads muaj; ntev 10-500mm.
4.Non-tus qauv loj square taub hau: Lub taub hau tau nthuav dav ntawm ob sab, ua rau nws cuam tshuam ntau dua - tiv taus thiab av qeeg- tiv taus. Customized rau cua zog txhawb nqa thiab cov khoom siv mining.
V. Nto tiav
1.Electro-plated Zinc: 72-96-teev ntsev-txhaj tshuaj tiv thaiv, zoo tagnrho rau kev siv sab hauv tsev.
2.Hot-Dip Galvanizing (HDG): Txheej thickness ranges ntawm 45-85μm nrog 500-800-teev ntsev-txhaj tshuaj ntsuam xyuas. Nws yog dav siv rau sab nraum zoov steel qauv thiab railway Cheebtsam.
3.Dacromet / Ruspert Txheej: Tsis muaj kev pheej hmoo ntawm hydrogen embrittlement. Nws ua tiav 720-1000-teev ntsev-spray kev ua tau zoo thiab dhau los ua qhov kev xaiv 4.Tiav rau European export xaj.
5.Black Oxide: Kev xaiv tus nqi qis tsuas yog rau kev ua haujlwm hauv tsev qhuav.
6.PTFE Txheej: Siv rau cov kev pabcuam kub kub los tiv thaiv xov galling thiab qaug dab peg.
6. Scenario daim ntawv thov
1.Railway Transit (Core Application) Kub-dipped galvanized square-head bolts nyob rau qib 8.8-10.9 los ntawm M20-M30 yog loj-ordered rau rail clips, track-joint Cheebtsam thiab locomotive chassis qhov chaw.
2.Construction Machinery & Mining Equipment Lawv haum excavator thav ntawv, crushers thiab ua liaj ua teb machinery. Square-head tsim kom tsis txhob cuam tshuam nyob rau hauv qhov hnyav sab nraum qhov chaw.
3.Steel Structures, Guardrails thiab Heavy-Duty Supports Feem ntau siv rau ntawm PV brackets, pipeline kev txhawb nqa thiab txuas txuas txuas.
4.Petro-Chemical Equipment ASTM A193-B7 alloy-steel square-head bolts fasten yeeb nkab flanges, thaum A4-70 (316 stainless-steel) versions pab cov tshuaj cia tso tsheb hlau luam.
5.Replacement Parts for Export Legacy-Equipment Cov bolts no ua raws li cov khoom seem rau qub-style European thiab American machinery txij nkawm, qhov qub square-head bolts yog Hoobkas-tsim.