Vim li cas Fasteners Xav Tau Ntau Engineering dua Hardware
Crankshaft qhov ntswg tiv tauj loads yog qhov tshwj xeeb thiab tsis tuaj yeem ua raws li tus qauv bolts. Lub harmonic damper yog cuam tshuam - haum rau lub qhov ntswg crankshaft, thiablub fastening boltmuab axial clamping quab yuam kom muaj kev cuam tshuam hauv txhua qhov kev khiav haujlwm. Txhua lub cav combustion xa ib crankshaft torsional mem tes. Cov pulses no hloov mus rau hauv shearing rog ntawm txoj kev tseem ceeb thiab ntsia liaj qhov rooj interface los ntawm lub damper lub inertia nplhaib. Cov khoom siv tsav tsheb tas li loads lub qhov ntswg damper tom qab.
Axial clamp, torsional shear, thiab txoj siv tawv nruj bending muab lub fastener ntawm qhov kev sib tshuam kev ntxhov siab uas cov khoom siv zoo tib yam tsis tuaj yeem ua. Tus qauv -torqued M14 ntsia liaj qhov rooj yuav ncab, so, thiab rov qab tawm hauv qhov kev sib koom ua ke no. Precision crankshaft bolts muaj undercut shanks, siab - tensile cov ntaub ntawv qib, thiab tswj -stretch tightening txoj kev los zaum lub damper ntau lab ntawm combustion cycles.
Torque-rau-Yield Tightening Theories of Elastic Limit
Niaj hnub nimno crankshaft bolts yog torque -rau - tawm (TTY) tiv thaiv elastic- cheeb tsam torquing. Nyob rau hauv ib txwm ntsia liaj qhov rooj lub torque ua ib tug clamp quab yuam hauv qab lub yield point ntawm cov khoom, tawm hauv ib tug loj elastic ntau yam rau variation nyob rau hauv load. Thaum TTY fasteners tau nruj dhau qhov taw tes tawm mus rau hauv thaj tsam ntawm cov yas deformation, lub ntsia liaj qhov rooj txuas ntxiv mus tas li thiab tuav lub siab tshaj plaws clamp quab yuam nrog cov npoo me me.
Qhov zoo: TTY fasteners tom 15-20% nruj duaib txwm boltsntawm tib txoj kab uas hla, tshem tawm damper micro- txav ntawm siab RPM. Hmoov tsis zoo, cov yas distortion txwv tsis pub rov siv lub ntsia liaj qhov rooj. Ib qho chaw ruaj khov nyob rau hauv lub torqued thiab tshem tawm TTY fastener yuav ua rau lub clamp profile, thiab reinstallation yuav muaj kev phom sij tshwj tsis yog tias ua ntej lossis tawg.
KHOOM-CNC. Order crankshaft bolts elastic - cheeb tsam thiab TTY. Rau TTY, qhov me me ntawm txoj kab uas hla ntawm lub shank yog precision zoo li tus kom cov yas deformation nyob rau hauv lub undercut cheeb tsam deb ntawm lub hauv paus xov. Ra < 0.4 µm smoothening ntawm txoj kev hloov lub vojvoog ntawm lub undercut thiab tag nrho txoj kab uas hla shank tshem tawm qhov chaw ntawm kev ntxhov siab concentration uas yuav ua rau qaug zog tawg thaum lub sij hawm cyclic loading.
Fracture thiab Fatigue Lub Neej
Lub crankshaft damper interface fastener qaug zog tsis ua hauj lwm qauv yog kwv yees. Cracks pib ntawm cov hauv paus xov, qhov siab tshaj plaws kev ntxhov siab qhov taw tes, thiab kis thoob plaws lub me txoj kab uas hla nyob rau hauv cyclic tensile loading. Qhov tawg ua ntsiag to kom txog thaum tus ntoo khaub lig seem - ntu tsis tuaj yeem txhawb nqa lub clamp load, thaum lub sijhawm ntawd lub ntsia liaj qhov rooj tawg thiab lub damper tshem tawm ntawm lub qhov ntswg crankshaft.
Hom kev ua tsis tiav no muaj peb qhov kev daws teeb meem engineering:
Lub undercut geometry diverts elastic elongation los ntawm cov xov hauv paus mus rau lub shank lub cev los ntawm kev txo cov shank txoj kab uas hla hauv qab cov xov me kab rau ib tug predetermined ntev. Qhov kev ntxhov siab tshaj plaws yog txav deb ntawm qhov chaw pib tawg.
Rolling threads tom qab kev kho cua sov hardens lub hauv paus nto thiab ua rau compressive residual kev nyuaj siab, uas yuav tsum tau kov yeej ua ntej tensile qaug zog tawg tej zaum yuav tshwm sim. Nyob rau hauv tib cov ntaub ntawv qib, dov threads muaj 20-30% ntau zog qaug zog tshaj txiav threads.
Nto tiavtswj: Machining markings ntawm lub shank muaj nuj nqi li micro-notches. TSEEM CEEB-CNC polishes damper fastener shanks rau Ra Tsawg dua los yog sib npaug rau 0.8 µm thiab txo qhov tsis xws luag ntawm qhov chaw uas ua rau qaug zog tawg.
Dimensional soj ntsuam siv cov kev sib koom tes ntsuas tshuab (CMM) thiab nto roughness testers xyuas cov kev ntsuas no, thiab ISO 9001: 2015 kev tswj zoo muab ntau traceability ntawm raw khoom Tshuag mus rau qhov kawg tivthaiv.
Khoom siv thiab txheej txheej rau lub cav-Bay Environments
Damper fasteners ua haujlwm nyob rau hauv ib puag ncig saturated nrog roj vapor, coolant pos huab, txoj kev ntsev, thiab thermal cycling los ntawm sub-zero txias pib mus rau 150℃kev khiav hauj lwm kub. Kev xaiv cov khoom yuav tsum sib npaug tensile zog, corrosion kuj, thiab compatibility nrog crankshaft qhov ntswg cov ntaub ntawv.
|
Khoom Qib |
Tensile zog |
Cov yam ntxwv tseem ceeb & Daim Ntawv Thov |
|
12.9 Alloy hlau |
1,220 MPa |
Feem ntau cov specification rau crankshaft bolts. Roj-quenched thiab tempered. Phosphate lossis zinc-nickel plating ntxiv kev tiv thaiv corrosion. Txoj kev thiab kev ua haujlwm nruab nrab. |
|
17-4PH Stainless hlau |
1, 000+ MPa |
Cov dej nag- hardening stainless rau marine thiab ntug hiav txwv dej. Inherent corrosion kuj - tsis tas yuav plating. Tshem tawm plating flake contamination hauv roj system. |
|
ib 718 |
1, 300+ MPa |
Nickel-chromium superalloy rau huab- lub luag haujlwm thiab kev ua kis las. Khaws 80% tensile zog ntawm 650 degree. Anti-cov khoom siv dag zog tiv thaiv kev qaug dab peg tom qab ntau txhiab lub tshav kub. |
KEY-CNC tshuab damper fasteners los ntawm tag nrho peb tsev neeg cov khoom siv nrog zeb- ntawv pov thawj, thiab siv zinc- npib tsib xee plating, dub oxide, los yog phosphate coatings rau cov neeg siv khoom specification. Cov khoom siv traceability taug qab txhua qhov ntau los ntawm cov khoom nyoos bar los ntawm cov khoom tiav, tshuaj xyuas.
Cim npe nrov: Crankshaft bolts rau harmonic damper los ua ke, Tuam Tshoj crankshaft bolts rau harmonic damper los ua ke manufacturers, lwm tus neeg, Hoobkas
