1. Thread Galling yog dab tsi
Xov galling (tseem hu ua seizing lossis txias vuam) yog hais txog kev sib txuas mus tas li ntawm bolt thiab txiv ntoo threads tom qab zawm. Lub fastener yuav tsis yooj yim sua kom disassemble feeb tom qab kev teeb tsa lossis tom qab siv sijhawm ntev -. Forced twisting tsuas yog strip threads los yog snap lub bolt shank.
Qhov kev ua tsis tiav no tshwm sim tsuas yog ntawm 304 (A2) thiab 316 (A4) austenitic stainless hlau fasteners. Carbon steel thiab alloy steel hardware tsis tshua muaj kev txom nyem los ntawm galling.
2. Plaub hauv paus ua rau Stainless Hlau Thread Galling
2.1 Cold Welding los ntawm kev sib txhuam thaum tshav kub kub (Piv txwv li)
Stainless hlau muaj thermal conductivity tsis zoo. Kev sib txhuam siab thaum lub sij hawm zawm ua rau muaj qhov kub thiab txias, uas ua rau cov kab mob tsis zoo los tiv thaiv - xeb zaj duab xis ntawm cov xov xov. Tshaj tawm cov hlau tshiab nyob rau hauv siab thiab cua sov tsim micro txias vuam, fusing xov crests ua ke tag nrho.
Feem ntau disassembly, dhau -torquing thiab ntev- lub hnub raug tshav yuav ua rau lub galling loj heev.
2.2 High Metallic Affinity nruab nrab ntawm cov hlau zoo tib yam
Thaum ob qho tib si ntsia liaj qhov rooj thiab txiv ntoo yog ua los ntawm 304 / 316 stainless hlau, lawv sib koom cov tshuaj muaj pes tsawg leeg thiab cov qauv siv lead ua uas muaj zog molecular affinity. Kev sib txhuam yooj yim ua rau hlau hloov thiab adhesion.
Pairing dissimilar hlau tuaj yeem txo qhov kev pheej hmoo ntawm kev ntes.
2.3 Cov xov tsis zoo Precision & ntxhib nto tiav
Tsawg-tus nqi stainless hlau fasteners tuaj nrog burrs thiab ua tsis zoo txiav threads nrog tsawg clearance. Concentrated contact pressure ua rau muaj kev ntxhov siab hauv zos ntau dhau thiab ua rau lub plab zom mov.
Rust, sediment thiab ntsev crystal residue ntawm threads ntxiv intensify kev sib txhuam kub.
2.4 Chloride Corrosion Aggravates Seizing (Cov ntug dej hiav txwv & Chemical Environments)
Chloride ions los ntawm ntug hiav txwv huab cua, cov pas dej da dej thiab cov nroj tsuag tshuaj ua rau cov hlau tsis muaj zog thiab ua rau me me pitting corrosion ntawm cov xov. Tsis sib xws pitting nto sib sib zog nqus, ua rau sai galling nyob rau hauv me ntsis kev co.
3. Kev daws teeb meem tag nrho
3.1 Cov kev daws teeb meem tseem ceeb ntawm theem kev yuav khoom
1. PTFE Coated Stainless Hlau Fasteners
High- kub resistant PTFE lubricant txheej yog siv rau cov xov los txiav kev sib txhuam thiab cais cov hlau sib cuag. Nws hla dhau 720 teev ntsev tshuaj tsuag, ntsuas kev tiv thaiv corrosion thiab tiv thaiv -kev ua haujlwm siab. Qhov zoo tshaj plaws rau siab - cov khoom siv kub, cov chaw siv tshuaj, cov hnub ci sab nrauv thiab cov flanges uas yuav tsum tau ua haujlwm tsis tu ncua.
2. Molybdenum Disulfide Pre-Lubricated Screws
Khoom lubricant ua ntej-coated ntawm threads ua ntej xa khoom, tus nqi qis dua PTFE txheej. Haum rau sab hauv tsev stainless hlau machinery thiab cov khoom ua zaub mov.
3. Precision Rolled Thread Standard Fasteners
Tsim nyog manufacturers tsim dov threads nrog tus profile thiab tus qauv kam rau ua kom txo cov concentrated extrusion kev sib txhuam. Tsis txhob pheej yig uas tsis yog -tus qauv fasteners nrog tshuab dhos- txiav xov.
3.2 Tsawg-Tus Nqi Ntawm-Qhov Kev Ntsuas Kev Sib Tw
1. Siv stainless hlau los tiv thaiv- txeeb muab tshuaj txhuam (molybdenum disulfide raws) sib npaug ntawm cov xov ua ntej sib dhos. Nws cais cov hlau sib cuag thiab tiv taus cua sov, dav siv hauv kev tsim kho hauv nroog thiab hauv hiav txwv. Khoom noj khoom haus- qib txhuas- cov roj nplua nyeem pub dawb yog xav tau rau cov khoom noj khoom haus.
2. Siv calibrated torque nkaus xwb, zam dhau - zawm
Stainless hlau muaj zog tensile qis dua siab - tensile carbon steel. Ua raws li DIN / ISO tus qauv torque qhov tseem ceeb kom txo qis kev sib txhuam kub.
3. Tswj ceev ceev
Siv phau ntawv wrenches nrog tsawg ceev ceev. Tsis txhob muaj siab - ceev cuam tshuam cov cuab yeej pneumatic, vim tias muaj kev sib txhuam kub sai sai ua rau lub plab zom mov.
4. Ntxiv cov tshuab ntxhua khaub ncaws los yog lub caij nplooj ntoos hlav ntxhua kom faib cov siab
Washers disperse localized xov siab thiab tiv thaiv kev puas tsuaj rau nto passive zaj duab xis.
3.3 Kev kho rau Twb Galling Xauv Xov
1. Txau cov tshuaj tiv thaiv xeb thiab tawm rau 20-40 feeb kom nkag mus rau hauv cov xov khoob, ces maj mam loosen. Tsis txhob siv brute force ncaj qha.
2. Soak cov khoom hauv dej sov kom soften xeb crystals thiab txo adhesion zog.
3. Maj mam kub tsuas yog cov txiv ntoo nrog cov nplaim me me (tsis txhob siv lub sijhawm ntev cua sov ntawm lub bolt shank). Thermal expansion sib txawv widens xov clearance rau disassembly thaum kub. Ntev -lub sij hawm siab- kub cua sov yog txwv tsis pub, uas ua rau intergranular corrosion thiab txo stainless hlau txhua yam muaj zog.
4. Yog hais tias txoj kev saum toj no tsis ua haujlwm, txiav cov txiv ntoo nrog lub kaum sab xis thiab hloov cov fasteners tshiab. Tsis txhob hammered bolts.
4. Cov lus pom zoo sib xws raws li kev ua haujlwm
1. Offshore, ntug hiav txwv dej, tshuaj nroj tsuag, siab -kub flanges, txhua xyoo nquag tu: PTFE coated 316 stainless hlau fasteners raws li sab saum toj xaiv
2. Khoom noj khoom haus sab hauv tsev, ib txwm- cov khoom siv kub, tsis tshua muaj disassembly: Molybdenum disulfide ua ntej-coated screws ntxiv rau ntawm -site anti- txeeb muab tshuaj
3. Tsawg- pob nyiaj siv hauv tsev yooj yim thav ntawv: Stainless hlau bolts txuam nrog tooj dag txiv ntseej
4. Kev kho dua tshiab ib ntus & kev saib xyuas me me: Ntawm - qhov chaw tiv thaiv - txeeb cov roj nplaum txheej thaum lub sijhawm teeb tsa
Tiv tauj peb
Peb muab tag nrho cov series ntawm PTFE coated 304 & 316 stainless hlau txheem fasteners, xws li DIN933 hex bolts, DIN934 hex txiv ntseej thiab lub qhov (socket head cap screws). Peb tuaj yeem muab cov ntawv qhia txog tshuaj tsuag ntsev thiab tshuaj tiv thaiv -cov ntaub ntawv kuaj mob. Xa koj qhov project ib puag ncig thiab qhov tshwj xeeb loj kom tau txais cov kev daws teeb meem dawb thiab cov lus hais.