Cryo-trimming ntawm cov khoom siv roj hmab
Part1. Txheej txheem cej luam
Unvulcanized roj hmab yog cov kua dej khov nyob rau hauv qhov kub thiab txias. Thaum nws los txog rau theem compression vulcanization, cov roj hmab sai sai ua rau pwm kab noj hniav, thiab qhov ntau dhau (kom tiv thaiv tsis muaj roj hmab, cov roj hmab ntim rau hauv pwm kab noj hniav yuav tsum muaj qee qhov ntau dhau) overflows thiab vulcanizes, sib sau ua kua nplaum. --- yog, flash. Thaum lub flash tsim, nws yuav tsum tau muab tshem tawm kom lub ntsej muag zoo nkauj thiab zoo nkauj. Cov txheej txheem no feem ntau hu ua trimming. Cov kev xav tau rau trimming yog qhov loj thiab zoo nkauj. Hauv kev tsim khoom tiag. Kev txiav cov khoom siv feem ntau siv sijhawm thiab siv zog ua haujlwm. Rau cov khoom lag luam uas yuav tsum tau nruj me ntsis, qhov kev tsis saib xyuas me ntsis thaum lub sij hawm txiav yuav ua rau cov khoom pov tseg thiab cov khoom tsis zoo, yog li nws yuav tsum tau kho nrog ceev faj. Feem ntau hais lus, qhov me me ntawm cov khoom lag luam thiab ntau qhov kev teeb tsa, qhov nyuaj dua qhov txiav, thiab cov khoom pov tseg ntau dua.
Ntu 2. Kev faib cov txheej txheem trimming
Lub trimming ntawm cov khoom siv roj hmab tau muab faib ua peb pawg: phau ntawv, mechanical thiab khov:
- Phau ntawv trimming. Tus neeg teb xov tooj tuav ib lub cuab yeej thiab maj mam trims lub flash nyob rau sab ntug ntawm cov khoom. Qhov no yog txoj kev tseem ceeb tshaj plaws. Lub efficiency yog tsawg thiab qhov zoo yog qhov nyuaj rau lav. Nws yog ib qho nyuaj tshwj xeeb los ua ib txoj hauj lwm zoo thiab huv si rau cov khoom siv nrog cov kev teeb tsa nyuaj thiab cov kev xav tau siab, thiab nws yooj yim rau kev puas tsuaj rau kev sib txuas ntawm cov khoom lub cev thiab lub teeb. Feem ntau tawm ntawm cov hniav thiab qhov khoob, tawm hauv cov roj to, cua to thiab lwm yam sequelae uas cuam tshuam rau lub foob. Tsis tas li ntawd, phau ntawv trimming kuj tseem nyob ntawm tus neeg teb xov tooj qhov kev txawj ntse.
- Mechanical trimming. Txhawm rau txhim kho kev ua tau zoo thiab ua tau zoo, cov tshuab txiav txiav tau tshwm sim. Qhov feem ntau yog lub tshuab hluav taws xob tshwj xeeb trimming nrog cov hniav tig. Cov hniav siv yuav tsum sib phim heev nrog cov khoom loj. Yog tias cov npoo sab hauv thiab sab nrauv ntawm cov khoom muaj flashes, nws tuaj yeem tsim los ua ob-edged lossis multi-edged ib qho kom ua tiav ib zaug. Kev ua tiav ntawm cov tshuab trimming tshaj qhov ntawm phau ntawv trimming, thiab qhov ua tau zoo kuj yog ob npaug. Tshwj xeeb tshaj yog rau cov khoom lag luam nrog ib qho pwm thiab ntau cov kab noj hniav, cov cuab yeej sib txuam tuaj yeem tsim raws li kev npaj thiab kev faib khoom. Tom qab cov khoom raug tshem tawm ntawm pwm, tag nrho cov phaj tuaj yeem muab tso rau thiab xuas nrig ntaus tuaj yeem ua tiav ib zaug. Nrog rau kev koom tes ntawm cua sov, kaum ob ntawm daim tuaj yeem txiav ib zaug. Ib qho piv txwv yog kev xuas nrig ntaus thiab txiav ntawm tag nrho cov phaj ntawm kev kho mob ntsaws. Qhov tseem ceeb yog tswj qhov kub ntawm qhov punching zoo kom tsis txhob muaj adhesion tom qab nws siab dhau lawm.
- Frozen trimming. Cov khoom tiav vulcanized ua ke nrog lub teeb raug tshem tawm nyob rau hauv qhov chaw khov. Ob peb xyoos dhau los, nrog rau kev xaiv thiab hloov cov khoom siv khov kho thiab kev txhim kho ntawm cov khoom siv kho tshuab, cov khoom siv khov kho tau dhau los ua ntau tiam neeg ntawm kev txhim kho, ua kom paub tab thiab zoo meej, thiab kev ua haujlwm zoo thiab kev ua haujlwm tau zoo dua qub. Cov txheej txheem yog kom txias cov khoom vulcanized nyob rau hauv khov thiab dynamic tej yam kev mob kom lub flash nkag mus rau ib tug brittle lub xeev. Tom qab ntawd, los ntawm kev sib txhuam ntawm lawv, los yog nyob rau hauv dynamic tej yam kev mob xws li kev sib hloov, kev co, thiab viav vias, lub flash raug tshem tawm los ntawm kev sib txhuam. Xwb, qhov nruab nrab pellet nruj yog cuam tshuam ntawm qee qhov ceev ntawm cov khoom yuav tsum tau kho kom tshem tawm lub flash. ... Yog li ntawd, lub brittleness gradient tshwm sim los ntawm lub thickness sib txawv ntawm lub flash thiab lub cev yog siv los ua kom tiav cov trimming, uas yog, mus txeeb lub sij hawm sib txawv ntawm lub flash yog nkig thiab lub cev tsis yog nkig, thiab siv rau sab nraud. quab yuam xws li kev sib txhuam, kev cuam tshuam, thiab kev vibration rau cov khoom yuav raug txiav kom tshem tawm lub flash. Lub sijhawm no, cov khoom siv lub cev tseem nyob hauv lub xeev elastic thiab tsis puas. Tom qab ntawd. Cov nyhuv trimming tau txhim kho ntxiv los ntawm kev siv cov tshuaj tsuag tawm.
2. Cov evolution ntawm khov trimming tshuab. Frozen trimming thawj zaug tshwm sim nyob rau xyoo 1950 thiab txij li ntawd tau dhau mus txog plaub theem ntawm kev txhim kho.
(1) Thawj tiam ntawm khov trimming Frozen nruas trimming Lub nruas yog siv los ua lub thawv ua haujlwm, thiab cov dej khov qhuav tau pib xaiv ua cov tub yees. Cov khoom yuav tsum tau txiav yog loaded rau hauv lub nruas, los yog ib co ua hauj lwm nruab nrab uas muaj peev xwm ua si lub luag hauj lwm sib txhuam yog ntxiv. Qhov kub ntawm lub nruas yog tswj nyob rau hauv qhov ntau qhov chaw uas lub flash tau ua nkig tab sis cov khoom lub cev tsis nkig. Yuav kom ua tiav lub hom phiaj no, lub thickness ntawm lub flash yuav tsum tsawg dua los yog sib npaug rau 0.15mm. Lub nruas yog lub ntsiab ntawm cov khoom siv thiab yog octagonal. Lub ntsiab lus tseem ceeb yog tswj qhov chaw tsaws ntawm qhov nruab nrab ntawm cov tshuaj tsuag kom rov ua dua.
Raws li pom nyob rau hauv daim duab 1, lub nruas rotates counterclockwise, thiab cov khoom ntog raws 1-2 kab nyob rau hauv qhov kev txiav txim ntawm lub ntiajteb txawj nqus, thiab ces circulates nyob rau hauv ib ntus kom ua tau zoo tumbling. Tom qab ib lub sij hawm, lub flash yuav nkig thiab lub trimming yog thaum kawg ua tiav tusyees. Lub shortcomings ntawm thawj tiam thev naus laus zis yog tias nws tsis yog tag nrho, tshwj xeeb tshaj yog nyob rau ob sab ntawm qhov chaw parting, residual flash yog nquag tshwm sim. Qhov laj thawj yog vim li cas cov pwm tsim tsis zoo, lossis cov roj hmab txheej ntawm qhov sib cais yog tuab heev (ntau dua 0.2mm).
(2) Qhov thib ob tiam ntawm khov trimming tshuab
Nws tau ua peb txoj kev txhim kho nyob rau hauv lub hauv paus ntawm thawj tiam.
① Lub tub yees tau hloov mus rau cov kua nitrogen. Vim tias qhov chaw vaporization ntawm cov dej khov qhuav yog -78.5 degree, nws tsis haum rau qee cov roj hmab uas muaj qhov kub thiab txias (xws li roj hmab silicone). Qhov kub ntawm cov kua nitrogen yog -195.8 degree, uas yog haum rau txhua hom roj hmab.
② Txhim kho lub thawv rau cov khoom kom raug txiav. Lub nruas yog hloov los ntawm ib tug grooved conveyor siv raws li cov cab kuj. Nyob rau hauv txoj kev no, txij li cov khoom yuav tsum tau kho tuaj yeem dov mus rau hauv txoj siv groove, qhov tshwm sim ntawm cov fab tuag tau txo qis heev. Nws tsis tsuas yog txhim kho kev ua hauj lwm efficiency, tab sis kuj txhim kho qhov precision ntawm trimming.
③ Es tsis txhob cia siab rau qhov kev sib txhuam ntawm cov khoom yuav tsum tau kho kom tshem tawm cov npoo, cov tshuaj tsuag zoo tshaj plaws yog qhia. Granular hlau los yog tawv yas projectiles nrog ib tug particle loj ntawm 0.5 mus rau 2 hli yog siv los tua ntawm qhov chaw ntawm cov khoom yuav tsum tau kho ntawm ib tug linear ceev ntawm 25 mus rau 55 m / s, ua rau muaj kev cuam tshuam loj quab yuam, li no heev shortening lub voj voog.
(3) Qhov thib peb tiam ntawm khov trimming tshuab
Nws yog txhim kho nyob rau hauv lub hauv paus ntawm lub thib ob tiam. Lub thawv rau qhov yuav tsum tau kho yog hloov mus rau ib lub pob tawb nrog perforated qauv ntawm plaub phab ntsa. Cov qhov no yog thoob plaws plaub phab ntsa ntawm lub pob tawb, nrog lub qhov taub txog li 5 mm (loj tshaj li txoj kab uas hla ntawm qhov projectile kom tso cai rau lub projectile hla lub qhov kom du thiab ntog), thiab rov qab mus rau saum. cov khoom siv rau kev siv thib ob. Qhov kev npaj no tuaj yeem tsis tsuas yog nthuav dav lub peev xwm ntawm lub thawv, tab sis kuj txo qhov ntim ntawm qhov cuam tshuam nruab nrab (projectile). Cov qauv tsim tshwj xeeb suav nrog: lub pob tawb tsis tau muab tso rau ntsug, tab sis nrog qee qhov kev xav (40º-60º). Nws qhov kom zoo dua yog tias thaum lub sij hawm trimming txheej txheem, nws flips hnyav vim lub superposition ntawm ob lub zog: thawj lub zog yog lub zog tig los ntawm kev sib hloov ntawm lub pob tawb nws tus kheej; lub zog thib ob yog lub zog centrifugal tshwm sim los ntawm kev cuam tshuam ntawm qhov projectile. Thaum ob lub zog sib koom ua ke, 360º txhua qhov kev txav mus los yog tsim, ua rau muaj kev sib txuam thiab sib luag, yog li ua rau lub voj voog ua haujlwm luv.
(4) Plaub tiam ntawm khov trimming tshuab
Txawm hais tias lub cim thib peb ntawm khov trimming tshuab muaj qhov zoo ntawm kev sib tsoo thiab kev ua haujlwm ceev, nws kuj muaj ob qhov tsis zoo. Ua ntej, vim qhov kev txwv ntawm lub pob tawb ntim, nws tsis haum rau cov khoom loj nrog ib txoj kab uas hla ntawm Ntau dua lossis sib npaug ntawm 200mm; Qhov thib ob, qhov tseeb vim qhov txwv ntawm lub pob tawb ntim, nws tuaj yeem ua haujlwm tsuas yog hauv cov khoom siv, thiab txhua zaus cov batch hloov thiab pib, cov kua nitrogen yuav tsum tau siv ntau zaus, uas ua rau tus nqi nce ntxiv. Vim li no, ib txoj kab ntau lawm uas tuaj yeem ua haujlwm ntws tau tshwm sim. Tom qab cov khoom kho tau nkag mus rau hauv thaj chaw ua haujlwm, lawv txav mus tom ntej nrog kev pab los ntawm ib lub voj voog conveyor siv, dhau los ntawm cov kua nitrogen tso rau hauv qhov chaw txias, thiab qhov cuam tshuam rau qhov projectile txau, thiab tom qab ntawd qhov cuam tshuam trimming tiav. Tom qab ntawd cov khoom siv trimmed tuaj yeem tawm ntawm kab. Yog hais tias loj thiab me specifications sib xyaw, lawv tuaj yeem txheeb tau. Tom qab qhov cuam tshuam nruab nrab tau zoo, nws rov qab mus rau qhov chaw cia los ntawm kev ncig sab nraud.
Tom qab nkag siab qhov no, cia peb tham txog vim li cas cov khoom siv roj hmab yuav tsum tau khov.
- Lub hom phiaj
- Txhim kho qhov raug thiab qhov zoo; txhim kho cov nyhuv txiav, txo burrs thiab ntxhib npoo
- Ua kom yooj yim ntawm cov roj hmab tawv thiab ua kom yooj yim rau kev ua haujlwm
- Txheej txheem khiav
- Kev xaiv cov khoom siv raw: Xaiv cov khoom siv roj hmab uas tsim nyog rau kev ua kom khov, xws li roj hmab nitrile, silicone roj hmab, thiab lwm yam.
- Kev kho cua txias ua ntej: Muab cov khoom siv roj hmab tso rau hauv qhov chaw kub qis (-40 degree ~ -80 degree ) kom txias tag
- Trimming processing: Txiav, txiav thiab lwm yam kev ua haujlwm yog ua nyob rau hauv lub xeev khov
- Tom qab ua tiav: Tom qab ua tiav, tshem tawm sai sai ntawm qhov kub thiab txias ib puag ncig kom tsis txhob deformation los ntawm kev hloov kub
- Yam tseem ceeb
- Qhov kub thiab txias: Xaiv qhov ntsuas kub kom tsim nyog raws li cov khoom siv roj hmab sib txawv
- Lub sij hawm khov: xyuas kom meej tias cov khoom yog txias thiab meej
- Cov cuab yeej txiav: Siv cov cuab yeej ntse thiab du
- Kev ua haujlwm raug: Tswj kev txiav qhov tob thiab nrawm kom tsis txhob hla dhau
- Qhov zoo
- Txhim kho qhov raug thiab qhov zoo
- Txo deformation thiab burrs thaum txiav
- Ua kom yooj yim thiab ua tiav ntawm cov roj hmab tawv
- Cov chaw thov
- Cov khoom siv roj hmab xws li cov ntsaws ruaj ruaj thiab gaskets
- Cov khoom siv kho mob, khoom noj khoom haus qib roj hmab
- High-precision roj hmab qhov chaw
Kev sib txuas lus ntxiv, thov hu rau peb.