Nyob rau hauv txhuas profile extrusion ntau lawm, tuag kab yog ib qho ntawm feem ntau defects nto. Lawv tshwm raws li longitudinal concave-convex streaks raws extrusion kev taw qhia ntawm qhov profile nto. Cov kab me me ua rau tsis zoo rau qhov zoo nkauj, thaum qhov hnyav ua rau muaj teeb meem xws li xim sib txawv thiab tsis tiav hauv kev kho mob tom ntej xws li anodizing thiab hmoov txheej, ncaj qha txo cov khoom tawm los thiab qib xa khoom. Raws li ib qho kev mob zoo nyob rau hauv cov txheej txheem extrusion, cov kab tuag tshwm sim los ntawm ntau qhov ntev, suav nrog kev tuag, cov txheej txheem tsis zoo thiab cov khoom siv hluav taws xob zoo, thiab yuav tsum muaj kev tshuaj xyuas hauv paus thiab kev tswj xyuas kev daws teeb meem.
Qhov Tseem Ceeb Ua Rau Tuag Kab
Cov kab tuag yog qhov tseem ceeb ntawm kev sib cuam tshuam ntawm cov kabmob tuag thiab cov hlau ntws thaum cov hlau tawm ntawm qhov tuag qhov chaw. Txhua qhov extruded profiles muaj cov kab tuag rau qhov sib txawv, thiab lawv raug cais raws li qhov tsis xws luag thaum streak qhov tob tshaj cov qauv zoo. Lub ntsiab triggers poob rau hauv peb pawg:
1. Cov xwm txheej tuag
Cov tuag yog qhov tseem ceeb ntawm cov kab tuag, thiab cov xwm txheej ntawm cov kabmob nto ncaj qha txiav txim siab qhov profile nto zoo.
Tsis txaus bearing nto tiavYog hais tias cov kabmob nto ua tsis tau raws li daim iav polishing yuav tsum tau, nrog machining defects xws li hlau-txiav cov cim, cov cuab yeej cim thiab pits, cov flaws yuav ncaj qha replicated mus rau lub profile nto thaum lub sij hawm hlau ndlwg, tsim nruam longitudinal streaks. Tus qauv yuav tsum tau bearing nto roughness nyob rau hauv Ra 0.4 μm; Cov kab tuag ua qhov pom tau zoo thaum roughness tshaj Ra 0.8 μm.
Tsis txaus bearing hardness thiab hnavTsis txaus tuag nitriding ua rau saum npoo hardness hauv qab HV900, ua rau cov kabmob ceev ceev thaum tsim khoom thiab tsim cov cim zoo li furrow. Tom qab lub sijhawm ua haujlwm ntev, tev ntawm cov txheej nitrided thiab cov khoom siv hauv paus puas yuav ua rau muaj kev sib sib zog nqus ntawm cov kab tuag.
Tsis tsim nyog bearing tsimCov kabmob ntev ntev ntev ua rau cov hlau txhuam kev sib txhuam, ua kom muaj zog ntawm txhuas tuaj yeem thiab khawb qhov chaw. Cov kauj ruam loj sib txawv ntawm cov kabmob uas tsis muaj kev hloov pauv ua rau cov hlau ntws sai, tsim cov kab hauv zos tsa lossis grooved tuag kab.
Aluminium pickup thiab txawv teb chaws teeb meem ntawm cov kabmobThaum extrusion kub siab dhau lawm, aluminium alloy particles adheres rau cov kabmob nto thiab tsim tsim. Cov no ib ntus tshem tawm thiab rov ua raws li lub sijhawm tsim khoom, tawm hauv qhov tsis txuas lossis txuas ntxiv khawb ntawm qhov profile. Cov teeb meem txawv teb chaws xws li graphite thiab cov khib nyiab hlau uas tseem tshuav hauv cov kab noj hniav tuaj yeem tuaj yeem ncaj qha mus khawb cov grooves ntev.
2. Extrusion txheej txheem Factors
Cov txheej txheem tsis sib haum ua kom muaj kev cuam tshuam ntawm kev tuag tsis xws luag, ua rau lossis ua rau cov kab tuag.
Extrusion kub heevThaum billet thiab tuag kub tshaj qhov tshwj xeeb, aluminium alloy viscosity txo qis thiab plasticity nce, ua rau cov hlau feem ntau yuav ua raws li cov kabmob nto thiab tsim cov khoom thauj khoom. Meanwhile, kub ceev ceev tuag nto oxidation thiab annealing, txo hardness thiab hnav tsis kam.
Extrusion ceev ceev heevKev kub siab dhau los ua rau muaj kev ntxhov siab ntawm cov hlau ntws thiab ua rau muaj kev sib txhuam ntawm cov kabmob adhesion, uas tsis yog tsuas yog ua rau cov khoom siv txhuas tsis zoo, tab sis kuj ua rau tuag micro-vibration, tsim wavy tuag kab. Kev hloov nrawm nrawm kuj tuaj yeem tsim cov kev xav tau sai thiab nres cov cim.
Qhov kub tsis sib xwsTsis txaus tuag preheating thiab kub loj sib txawv nyob rau hauv ib cheeb tsam ua rau cov hlau tsis sib xws thiab overloaded nyob rau hauv lub zos bearing cheeb tsam, ua rau inconsistent hnav thiab txhuas pickup, thiab tsim longitudinal streaks ntawm txawv qhov hnyav.
3. Billet thiab khoom yam khoom
Billet quality defectsBillet muaj pes tsawg leeg sib cais, siab impurity cov ntsiab lus thiab tsis txaus homogenization ua rau cov yas tsis sib xws. Cov khoom tawv tawv yuav khawb grooves thaum dhau los ntawm cov kabmob. Oxide nplai thiab cov roj stains ntawm daim tawv nqaij, yog tias tsis ntxuav ua ntej extrusion, yuav raug nqa mus rau hauv qhov tuag kab noj hniav thiab khawb qhov profile nto.
Cov cuab yeej raug teeb meemExtruder spindle vibration, kev ua haujlwm tsis ruaj khov thiab tsis muaj kev txhawb nqa tuag tsis txaus tuaj yeem ua rau lub sijhawm vibration ntawm qhov tuag lossis qhov profile, tsim cov cim chatter thiab wavy tuag kab ntawm qhov chaw.
Targeted Solutions rau Die Lines
Txhawm rau hais txog cov laj thawj saum toj no, kev tswj hwm kev tswj hwm thoob plaws kev tswj hwm kev tuag, kev ua kom zoo dua qub thiab kev tswj hwm kev tsim khoom yuav tsum ua kom muaj txiaj ntsig zoo ntawm cov kab tuag.
1. Tag Nrho Cov Txheej Txheem Tuag Zoo Tswj
Txhim kho bearing machining thiab polishing precisionnruj me ntsis tswj cov bearing machining workflow. Ua cov txheej txheem polishing tom qab xaim txiav los xyuas kom meej qhov roughness Ra Tsawg dua los yog sib npaug rau 0.4 μm, tsis muaj cov npoo ntse lossis cov kauj ruam. Kho cov kabmob tawm lub kaum sab xis hauv -1℃txog -3℃kom txo qhov adhesion qhov siab thiab kev sib txhuam tsis kam.
Standardize nitriding kev kho mobTxais cov txheej txheem zoo roj nitriding kom ntseeg tau tias cov kabmob ntawm qhov tawv tawv ntawm HV900-1200 thiab cov txheej txheem nitrided sib sib zog nqus. Rov kuaj xyuas qhov tuag hardness tom qab ntau qhov kev hloov pauv ntau lawm. Re-nitride thiab re-polish tuag thaum txheej txheej nitrided tawm; raug txwv tsis pub los ntawm kev tsim khoom.
Optimize bearing tsimTsim cov kabmob ntev tsim nyog raws li qhov profile phab ntsa thickness thiab cov yam ntxwv ntawm alloy, tsis txhob ntev ntev los yog luv luv. Siv cov kev hloov pauv ntawm qhov sib txawv ntawm cov kabmob sib txawv ntawm cov thicknesses kom txo tau cov hlau ntws sai. Qhov sib npaug ntws nrawm ntawm qhov chaw pub khoom tsim rau cov ntu nyuaj kom txo tau cov kabmob hauv zos.
Tsim kom muaj kev ruaj ntseg mechanismKhaws cov ntaub ntawv siv rau txhua qhov tuag, thiab ua haujlwm tsis tu ncua ntawm tshuab polishing thiab txij nkawm raws li extrusion tonnage. Tam sim tshem tawm cov tuag rau kev tu thaum lub txhuas tuaj yeem tshwm sim thaum tsim khoom; yuam ua hauj lwm tsis pub. Tom qab kho, xyuas cov kabmob tiav thiab qhov ntev ua ntej rov qab mus rau ntau lawm.
2. Extrusion txheej txheem Parameter Optimization
Precisely tswj extrusion kubTeeb pom kev zoo billet thiab tuag kub raws li qib alloy. Rau 6063 alloy, billet kub feem ntau tswj ntawm 460-500℃thiab tuag kub ntawm 420-450 degree. Khaws qhov kub thiab txias tsis pub dhau ± 10℃kom tsis txhob kub ntau dhau.
Match tsim nyog extrusion ceevUa raws li lub hauv paus ntsiab lus ntawm "tsis tshua muaj kub nrog tsawg ceev, siab kub nrog kev kub ceev". Tsim nyog txo kev tawm nrawm rau cov profiles nrog cov kev xav tau zoo saum npoo. Ua kom ruaj khov extrusion ceev, tsis txhob nquag pib-nres thiab hloov ceev ceev, thiab txo cov cim nres thiab cov kev xav tam sim.
Preheat tuag tag nrho thiab uniformlyPreheat tuag kom huv si rau 2-4 teev ua ntej kev teeb tsa kom ntseeg tau tias qhov kub thiab txias tag nrho thiab tshem tawm qhov sib txawv hauv zos. Tswj qhov kub ntawm qhov sib txawv ntawm qhov chaw tuag nyob rau hauv 20℃thaum lub sij hawm tsim khoom kom ruaj khov hlau ntws.
3. Billet thiab Equipment Management
nruj me ntsis tswj billet zooSiv cov pob zeb tsim nyog los ntawm kev kho homogenization thiab tswj cov ntsiab lus impurity. Ntxuav cov nplais oxide thiab cov roj stains ntawm cov npoo npoo ua ntej extrusion kom tsis txhob muaj cov khoom txawv teb chaws nkag mus rau hauv cov kab noj hniav. nruj me ntsis tswj cov ntsiab lus sodium nyob rau hauv high-magnesium alloys kom txo tau cov txhuas pickup nyiam.
Xyuas kom cov cuab yeej ua haujlwm raugTsis tu ncua calibrate extruder spindle coaxiality thiab puller stability, thiab hloov cov ntsaws ruaj ruaj muaj hnub nyoog thiab qhia rails. Siv cov ntaub qhwv tuag ntawm qhov tsim nyog nruj kom tsis txhob tuag kev co thaum lub sij hawm extrusion. Khaws lub thawv extrusion sab hauv phab ntsa huv si thiab tsis tu ncua tshem tawm cov khoom txhuas thiab cov impurities.
Cov Lus Qhia Txog Kev Tiv Thaiv thiab Tswj Hauv Chaw
Kev tswj kab tuag tsom rau kev tiv thaiv. Nws raug nquahu kom cov tuam txhab tsim kom muaj kev tswj hwm peb theem:
Kev lees paub ua ntej tsim khoom: Txheeb xyuas cov kabmob saum npoo av, hardness thiab qhov ntev ua ntej kev teeb tsa tuag, thiab txheeb xyuas cov txheej txheem tsis zoo thiab cov khoom siv hluav taws xob zoo. Kev tsim khoom raug txwv yog tias tsis ua raws li cov cai.
Kev tshuaj xyuas hauv kev tsim khoom: Qauv thiab tshuaj xyuas qhov zoo ntawm txhua 10-20 profiles thaum lub sijhawm tsim khoom. Thaum cov kab tuag zuj zus lawm, tam sim ntawd txheeb xyuas qhov ua rau thiab ntsuas xws li kev txo qis, kev hloov kho kub lossis kho lub tshuab tuag.
Kev tshuaj xyuas tom qab kev tsim khoom: Ua cov hauv paus-ua rau kev soj ntsuam rau cov khoom siv nrog cov kab tsis kam tuag, hloov kho lub voj voog tu thiab cov txheej txheem tsis zoo, thiab tsim lub voj kaw zoo.
Raws li qhov teeb meem tshwm sim hauv kev lag luam aluminium extrusion, cov kab tuag tsis tuaj yeem raug tshem tawm tag nrho, tab sis tuaj yeem tswj tau nyob rau hauv cov txheej txheem txwv los ntawm kev tswj xyuas kom zoo. Kev ua kom zoo tshaj plaws ntawm kev tuag, cov txheej txheem thiab cov ntaub ntawv tsis yog tsuas yog txhim kho cov khoom nto zoo thiab tawm los, tab sis kuj txuas ntxiv lub neej tuag thiab txo cov nqi tsim khoom, ua rau nws yog txoj hauv kev tseem ceeb rau cov tuam txhab aluminium profile txhawm rau txhim kho kev sib tw tseem ceeb.
