Ntau qhov chaw ntawmlub zog tshiab reducer iavthiabautomotive iavqhov project yuav tsum tau txhaj tshuaj peening tom qab iav sib tsoo, uas yuav deteriorate qhov zoo ntawm cov hniav nto, thiab txawm muaj feem xyuam rau lub NVH kev ua tau zoo ntawm lub system. Daim ntawv no kawm txog cov hniav roughness ntawm cov txheej txheem txhaj tshuaj sib txawv thiab qhov sib txawv ua ntej thiab tom qab txhaj tshuaj peening. Cov txiaj ntsig tau pom tias kev txhaj tshuaj peening yuav ua rau cov hniav nto roughness, uas yog cuam tshuam los ntawm cov yam ntxwv ntawm qhov chaw, txhaj tshuaj peening txheej txheem tsis thiab lwm yam; Raws li cov txheej txheem tsim khoom uas twb muaj lawm, qhov siab tshaj plaws ntawm cov hniav roughness tom qab txhaj tshuaj peening yog 3.1 zaug uas ua ntej txhaj tshuaj peening. Kev cuam tshuam ntawm cov hniav roughness ntawm NVH kev ua tau zoo yog tham txog, thiab cov kev ntsuas los txhim kho qhov roughness tom qab txhaj tshuaj peening yog npaj.

Nyob rau hauv cov ntaub ntawv saum toj no, daim ntawv no tham los ntawm peb yam nram qab no:

Kev cuam tshuam ntawm kev txhaj tshuaj peening txheej txheem tsis nyob ntawm tus hniav nto roughness;

Lub amplification degree ntawm txhaj tshuaj peening ntawm cov hniav nto roughness nyob rau hauv cov txheej txheem batch ntau lawm;

Kev cuam tshuam ntawm qhov nce ntawm cov hniav roughness ntawm NVH kev ua tau zoo thiab ntsuas los txhim kho qhov roughness tom qab txhaj tshuaj peening.

Kev txhaj tshuaj peening yog hais txog cov txheej txheem uas muaj ntau yam me me projectiles uas muaj zog hardness thiab high-ceev txav mus rau ntawm qhov chaw. Nyob rau hauv qhov kev kub ceev ntawm qhov projectile, qhov saum npoo ntawm qhov yuav tsim pits thiab yas deformation yuav tshwm sim. Cov koom haum nyob ib ncig ntawm lub pits yuav tiv thaiv qhov deformation thiab tsim kom muaj kev ntxhov siab seem. Qhov sib tshooj ntawm ntau qhov pits yuav tsim cov txheej txheem residual compressive kev ntxhov siab rau ntawm qhov chaw, yog li txhim kho qhov qaug zog ntawm qhov. Raws li txoj kev tau txais kev kub ceev los ntawm kev txhaj tshuaj, kev txhaj tshuaj peening feem ntau muab faib ua compressed cua txhaj tshuaj peening thiab centrifugal txhaj tshuaj peening, raws li qhia hauv daim duab 1.

Compressed cua txhaj tshuaj peening siv compressed cua raws li lub hwj chim tshuaj tsuag tua los ntawm rab phom; Centrifugal txhaj koob tshuaj tivthaiv blasting siv lub cev muaj zog tsav lub impeller kom tig ntawm ib qho kev kub ceev kom pov qhov txhaj tshuaj. Cov txheej txheem tseem ceeb ntawm kev txhaj tshuaj peening muaj xws li saturation lub zog, kev pab them nqi thiab txhaj tshuaj peening nruab nrab cov khoom (khoom siv, qhov loj, zoo li, hardness). Lub zog saturation yog ib qho parameter rau tus yam ntxwv ntawm kev txhaj tshuaj peening lub zog, uas yog qhia los ntawm qhov siab arc (piv txwv li qhov khoov qib ntawm Almen xeem daim tom qab txhaj tshuaj peening); Kev pab them nqi yog hais txog qhov piv ntawm thaj chaw uas muaj los ntawm lub qhov tom qab txhaj tshuaj peening rau tag nrho cheeb tsam ntawm qhov chaw txhaj tshuaj peened; Feem ntau siv txhaj tshuaj peening media xws li steel hlau txiav txhaj tshuaj, cam khwb cia hlau txhaj tshuaj, ceramic txhaj tshuaj, iav txhaj tshuaj, thiab lwm yam. Qhov luaj li cas, zoo thiab hardness ntawm txhaj tshuaj peening media yog sib txawv qib. Cov txheej txheem dav dav uas yuav tsum tau ua rau kis tau tus mob iav ncej yog qhia hauv Table 1.

Qhov kev xeem yog qhov nruab nrab ncej iav 1/6 ntawm ib txoj haujlwm hybrid. Cov qauv iav yog qhia hauv daim duab 2. Tom qab sib tsoo, cov hniav nto microstructure yog Qib 2, qhov tawv tawv yog 710HV30, thiab cov txheej txheej zoo hardening qhov tob yog 0.65 hli, tag nrho hauv cov kev cai. Cov hniav nto roughness ua ntej txhaj tshuaj peening yog qhia nyob rau hauv Table 3, thiab cov hniav profile raug qhia nyob rau hauv Table 4. Nws yuav pom tau hais tias cov hniav nto roughness ua ntej txhaj tshuaj peening yog zoo, thiab cov hniav profile nkhaus yog du.

Cov phiaj xwm kuaj thiab ntsuas ntsuas

Compressed cua txhaj tshuaj peening tshuab yog siv nyob rau hauv lub xeem. Vim qhov kev sim ntsuas, nws tsis tuaj yeem txheeb xyuas qhov cuam tshuam ntawm kev txhaj tshuaj peening nruab nrab cov khoom (khoom siv, qhov loj me, hardness). Yog li ntawd, cov khoom ntawm txhaj tshuaj peening nruab nrab yog tas li nyob rau hauv qhov kev xeem. Tsuas yog qhov cuam tshuam ntawm lub zog saturation thiab kev tiv thaiv ntawm tus hniav nto roughness tom qab txhaj tshuaj peening yog xyuas. Saib Table 2 rau txoj kev xeem. Cov txheej txheem kev txiav txim siab tshwj xeeb ntawm cov ntsuas ntsuas yog raws li hauv qab no: kos lub saturation nkhaus (Daim duab 3) los ntawm Almen daim coupon xeem los txiav txim qhov saturation point, thiaj li yuav xauv lub compressed cua siab, steel txhaj tshuaj txaus, nozzle txav ceev, nozzle nrug ntawm qhov chaw. thiab lwm yam khoom siv parameter.

xeem tau

Cov ntaub ntawv ntawm tus hniav nto roughness tom qab txhaj tshuaj peening yog qhia nyob rau hauv Table 3, thiab cov hniav profile raug qhia nyob rau hauv Table 4. Nws yuav pom tau hais tias nyob rau hauv lub plaub txhaj tshuaj peening tej yam kev mob, tus hniav nto roughness nce thiab cov hniav profile nkhaus yuav concave thiab convex tom qab txhaj tshuaj peening. Qhov piv ntawm qhov roughness tom qab txau rau qhov roughness ua ntej txau yog siv los ua tus yam ntxwv ntawm roughness magnification (Table 3). Nws tuaj yeem pom tias qhov roughness magnification txawv nyob rau hauv plaub txheej txheem.

Batch Tracking ntawm Magnification ntawm Hniav Nto Roughness los ntawm txhaj Peening

Qhov kev ntsuam xyuas tau nyob rau hauv Tshooj 3 qhia tau hais tias cov hniav nto roughness nce nyob rau hauv txawv degrees tom qab txhaj tshuaj peening nrog ntau txheej txheem. Txhawm rau kom nkag siab qhov kev nthuav dav ntawm kev txhaj tshuaj peening ntawm cov hniav roughness thiab nce tus naj npawb ntawm cov qauv, 5 yam khoom, 5 hom thiab 44 qhov chaw nyob rau hauv tag nrho, raug xaiv los taug qab qhov roughness ua ntej thiab tom qab txhaj tshuaj peening nyob rau hauv cov xwm txheej ntawm batch ntau lawm txhaj tshuaj txheej txheem peening. Saib Table 5 rau cov ntaub ntawv qhia txog lub cev thiab tshuaj lom neeg thiab cov ntaub ntawv txhaj tshuaj ntawm cov khoom siv tom qab sib tsoo. Roughness thiab magnification ntawm cov hniav pem hauv ntej thiab nram qab cov hniav ua ntej txhaj tshuaj peening yog qhia nyob rau hauv daim duab 4. Daim duab 4 qhia tau hais tias qhov ntau ntawm cov hniav nto roughness ua ntej txhaj tshuaj peening yog Rz1.6 μ m-Rz4.3 μ m； Tom qab txhaj tshuaj peening, Qhov roughness nce, thiab qhov kev faib tawm yog Rz2.3 μ m-Rz6.7 μ m; Qhov siab tshaj plaws roughness tuaj yeem yog amplified rau 3.1 zaug ua ntej txhaj tshuaj peening.

Kev cuam tshuam ntawm cov hniav roughness tom qab txhaj tshuaj peening

Nws tuaj yeem pom los ntawm lub hauv paus ntsiab lus ntawm kev txhaj tshuaj peening tias qhov siab hardness thiab high-ceev txav txhaj tshuaj tawm ntau qhov pits ntawm qhov chaw, uas yog lub hauv paus ntawm residual compressive kev nyuaj siab. Nyob rau tib lub sijhawm, cov pits no raug khi kom ua kom lub ntsej muag roughness. Cov yam ntxwv ntawm qhov chaw ua ntej txhaj tshuaj peening thiab cov txheej txheem txhaj tshuaj peening yuav cuam tshuam qhov roughness tom qab txhaj tshuaj peening, raws li teev nyob rau hauv Table 6. Nyob rau hauv Tshooj 3 ntawm daim ntawv no, nyob rau hauv plaub txheej txheem txheej txheem, cov hniav nto roughness tom qab txhaj tshuaj peening nce mus rau txawv degrees. Hauv qhov kev sim no, muaj ob qhov sib txawv, uas yog, kev txhaj tshuaj ua ntej roughness thiab cov txheej txheem tsis ua haujlwm (saturation zog lossis kev pab them nqi), uas tsis tuaj yeem txiav txim siab qhov kev sib raug zoo ntawm kev txhaj tshuaj tom qab peening roughness thiab txhua qhov cuam tshuam. Tam sim no, ntau tus kws tshawb fawb tau tshawb fawb txog qhov no, thiab muab tso rau qhov kev kwv yees theoretical qauv ntawm qhov chaw roughness tom qab txhaj tshuaj peening raws li finite element simulation, uas yog siv los kwv yees qhov sib thooj roughness qhov tseem ceeb ntawm cov txheej txheem txhaj tshuaj sib txawv.

Raws li cov kev paub tiag tiag thiab kev tshawb fawb ntawm lwm tus kws tshawb fawb, cov qauv kev cuam tshuam ntawm ntau yam tuaj yeem xav tau raws li qhia hauv Table 6. Nws tuaj yeem pom tias qhov roughness tom qab txhaj tshuaj peening muaj kev cuam tshuam los ntawm ntau yam, uas kuj yog cov ntsiab lus tseem ceeb. cuam ​​tshuam cov residual compressive kev nyuaj siab. Txhawm rau txo qhov roughness tom qab txhaj tshuaj peening ntawm qhov chaw ntawm kev ua kom cov seem compressive kev nyuaj siab, ib tug loj tus naj npawb ntawm cov txheej txheem yuav tsum tau mus txuas ntxiv optimize parameter ua ke.

Kev cuam tshuam ntawm cov hniav nto roughness ntawm NVH kev ua haujlwm ntawm lub cev

Iav qhov chaw yog nyob rau hauv lub zog kis tau tus mob, thiab cov hniav nto roughness yuav cuam tshuam rau lawv cov kev ua tau zoo NVH. Cov txiaj ntsig kev sim qhia tau hais tias nyob rau hauv tib lub load thiab ceev, qhov ntau dua qhov roughness ntawm lub cev, qhov ntau dua qhov kev co thiab lub suab nrov ntawm lub cev; Thaum lub load thiab ceev nce, lub vibration thiab suab nrov nce ntau obviously.

Nyob rau hauv xyoo tas los no, cov haujlwm ntawm cov tshiab lub zog reducers tau nce sai, thiab qhia txog kev txhim kho ntawm kev kub ceev thiab lub zog loj. Tam sim no, lub siab tshaj plaws torque ntawm peb lub zog tshiab reducer yog 354N · m, thiab qhov siab tshaj plaws ceev yog 16000r / min, uas yuav nce mus rau ntau tshaj 20000r / min yav tom ntej. Raws li kev ua haujlwm zoo li no, kev cuam tshuam ntawm kev nce ntawm cov hniav roughness ntawm NVH kev ua haujlwm ntawm lub cev yuav tsum raug txiav txim siab.

Kev txhim kho kev ntsuas rau cov hniav roughness tom qab txhaj tshuaj peening

Kev txhaj tshuaj peening txheej txheem tom qab iav sib tsoo tuaj yeem txhim kho qhov kev sib cuag qaug zog ntawm cov iav hniav nto thiab khoov qaug zog ntawm cov hniav hauv paus. Yog tias cov txheej txheem no yuav tsum tau siv vim muaj zog vim li cas hauv cov txheej txheem tsim iav, txhawm rau muab kev txiav txim siab rau NVH kev ua haujlwm ntawm lub cev, qhov roughness ntawm iav hniav nto tom qab txhaj tshuaj peening tuaj yeem txhim kho los ntawm cov hauv qab no:

ib. Optimize qhov txhaj tshuaj peening txheej txheem tsis, thiab tswj lub amplification ntawm cov hniav nto roughness tom qab txhaj tshuaj peening ntawm qhov chaw ntawm kom ntseeg tau cov seem compressive kev nyuaj siab. Qhov no yuav tsum tau muaj ntau yam kev ntsuam xyuas, thiab cov txheej txheem versatility tsis muaj zog.

b. Cov txheej txheem txhaj tshuaj sib xyaw peening yog saws, uas yog, tom qab lub zog ib txwm txhaj tshuaj peening tiav, lwm txhaj tshuaj peening ntxiv. Cov txheej txheem txhaj tshuaj ntxiv zog yog feem ntau me me. Hom thiab qhov loj ntawm cov ntaub ntawv txhaj tshuaj tuaj yeem hloov kho, xws li txhaj tshuaj ceramic, iav txhaj tshuaj lossis steel hlau txiav nrog me me.

c. Tom qab txhaj tshuaj peening, cov txheej txheem xws li hniav polishing thiab dawb honing yog ntxiv.

Nyob rau hauv daim ntawv no, tus hniav nto roughness ntawm txawv txhaj tshuaj peening txheej txheem tej yam kev mob thiab txawv qhov chaw ua ntej thiab tom qab txhaj tshuaj peening yog kawm, thiab cov nram qab no cov lus xaus yog kos raws li cov ntaub ntawv:

◆ Kev txhaj tshuaj peening yuav ua rau cov hniav nto roughness, uas yog cuam tshuam los ntawm cov yam ntxwv ntawm qhov chaw ua ntej txhaj tshuaj peening, txhaj tshuaj peening txheej txheem tsis thiab lwm yam, thiab cov yam tseem ceeb no kuj yog cov tseem ceeb yam tseem ceeb cuam tshuam cov seem compressive kev nyuaj siab;

◆ Nyob rau hauv cov txheej txheem tsim khoom uas twb muaj lawm, qhov siab tshaj plaws ntawm cov hniav roughness tom qab txhaj tshuaj peening yog 3.1 zaug uas ua ntej txhaj tshuaj peening;

◆ Qhov nce ntawm cov hniav roughness yuav ua rau muaj kev vibration thiab suab nrov ntawm lub cev. Qhov ntau dua qhov torque thiab ceev, qhov pom tseeb qhov nce ntawm kev vibration thiab suab nrov;

◆ Cov hniav nto roughness tom qab txhaj tshuaj peening tuaj yeem txhim kho los ntawm kev ua kom zoo dua cov txheej txheem txhaj tshuaj peening, sib xyaw txhaj tshuaj peening, ntxiv polishing lossis dawb honing tom qab txhaj tshuaj peening, thiab lwm yam. cav 1,5x.