Kev tshawb fawb rau txhaj tshuaj poob rau hauv txhaj moulding tshuab barrel

foreword

Injection molding txheej txheem parameter teem yog ib daim teb muaj zog thiab tsis muaj zog, thiab nws tsis yooj yim mus nrhiav kom tau [1] ua qauv mathematical, Thaum cov ntaub ntawv tsom xam tshuab yog ib txoj kev los nrhiav kev paub los ntawm keeb kwm cov ntaub ntawv keeb kwm, uas tsis xav tau txoj kev siv, Li ntawd, nws yog ntau lug siv nyob rau hauv daim teb no. Piv txwv, Zhang Lingli et al. [2] Siv ntau regression tsom xam los tsim kom muaj ib tug qauv regression qauv rau txoj kev sib raug zoo ntawm tus txhaj tshuaj siab thiab pwm kub thiab cov geometric luaj li cas ntawm lub moldingXie Peiping et al [3] Tham txog txoj kev sib raug zoo ntawm cov residual kev nyuaj siab ntawm txoj kev tshawb no los ntawm txoj kev tshawb no hom cavity siab nkhaus ntawm ntau qhov chaw; SHEN C Y et al [4] optimized tus txheej txheem parameters txo qhov ntim shrinkage ntawm cov khoom molding, Thiab [5] Npaj tseg ib txoj kev soj ntsuam xyuas txoj kev los ntawm cov qauv network qauv, Li ntawd, kom twb paub lawm txhaum xyuas thiab zoo twv ua ntej.

Yav dhau los ntau lawm xyaum, Engineers yuav tsuas tau txais cov ntaub ntawv siab nyob rau hauv lub barrel ntawm tus txhaj tshuaj molding tshuab, Li ntawd, tus txhaj siab nyob rau hauv lub barrel yog feem ntau sib npaug rau lub siab nyob rau hauv lub moldity, Thaum txhaj siab poob rau hauv lub barrel yog ignored. Nrog txoj kev loj hlob ntawm kev txhaj tshuaj molding tshuab, Ntxiv thiab ntau dua thiab ntau practitioners pom tau hais tias qhov tseem ceeb Index cuam tshuam dab tsi rau qhov zoo tshaj ntawm txhaj tshuaj molding khoom yog lub pwm cavity txhaj siab es tus txhaj tshuaj feedback los ntawm lub tshuab molding tshuab, thiab pib them xim rau txoj kev tshawb no uas txhaj tshuaj tiv thaiv kab mob hauv lub tshuab molding tshuab, Tab sis ob peb systematic kev tshawb fawb cov ntaub ntawv thiab cov lus xaus tau qhia.

Raws li txoj kev loj hlob tshuab sib nyob rau hauv daim teb ntawm yas txhaj tshuaj molding, Tag nrho nrog txoj kev lag luam raws li txoj cai, Tam sim no nyob rau hauv cov txhaj tshuaj poob kev tshawb fawb, mus txog hauv kev tshuaj ntsuam kom tau cov ntaub ntawv, Thiab siv cov ntaub ntawv tsom xam tshuab los tshawb cov txhaj tshuaj poob qauv, ua kom txhaj tshuaj poob prediction accuracy.

Khoom thiab pwm rau txoj kev tshawb no

Qhov kev kuaj ntawd yuav kuaj tau yog nyob ntawm ib tug 1 200 kN hluav taws xob txhaj tshuaj, uas adopts daim ntawv qhia txog tsav tsheb thiab PLC, frequency conversion thiab servo tswj tshuab, thiab yuav cuag precision tswj. Tswj cov txhaj tshuaj molding tshuab rau stability

Kev kawm yuav xyuas kom cov reliability thiab stability ntawm qhov kev kuaj ntawd. Lub mold siv rau kev tshawb fawb yog ib ob phaj pwm zoo tib yam channel ntsia nrog siab sensor ntawm khub rooj vag. Qhov kab noj hniav loj yog qhov kab noj hniav 301 mm 57 mm 2.5 mm. Cov khoom ua tau niaj hnub thickness thiab yooj yim qauv, Uas yuav twb paub lawm tus nqi tsawg thiab siab efficiency txhaj txoj kev kuaj ntawd.

Pab txhawb cov ntaub ntawv tshaaj thiab tsom xam, Lub ComoDataCen yog utilizedThe te (Hab txhawb cia lawv rau r injection process data), Centralized sau thiab processingThe txhaj siab thiab lub siab sensor siab ntawm lub rooj vag mold, Qhov kev kuaj ntawd kuaj pom muaj nyob rau hauv Daim Duab 1.

xyaum ua tej yam

Txij thaum txoj kev tshawb no mus sib hais yog tsim los tshawb cov yam cuam tshuam dab tsi rau lub siab thaum txhaj tshuaj, siab

Txhaj tshuaj, kub, thiab khoom siv 3 Khoom

Txoj kev tshawb no variables, Muaj ib kis ntawm kev siv viscosity Index (VI) Ntawm 51.6%

327.2 (Ib zaug xwb siv viscosity Index yog ntawm qhov kub thiab shear tus nqi ntawm 1 000 / s) Siv cross-WLFThe viscosity xam los ntawm cov qauv viscosity yuav muaj kev cuam tshuam cov kua ntawm cov khoom rau ib yam twg, Ua tau txhaj tshuaj nyob rau hauv ntau melt kub ntawm screw speeds ntawm 20 ~ 180 mm/s, thiab sau siab thiab txhaj sensor siab nyob rau hauv ntau yam kev tshuaj ntsuam. Daim ntawv teev cov ntaub ntawv ntsuam xyuas cov ntaub ntawv yog muaj nyob rau hauv Table 1.

Kev ntsuam xyuas cov ntaub ntawv sau los

Los ntawm koob tshuaj ntsuam pwm pwm, Qhov txhaj tshuaj ntawm txhaj tshuaj thiab pwm sensor siab nkhaus nyob rau hauv ntau yam kev mob txawv ntawm ntau yam ntaub ntawv yog tau txais, thiab txhaj tshuaj nkhaus V / P yog switched

Lub sij hawm siab tus nqi PF 1 thiab tus tuag sensor siab nkhaus V / P hloov

Tus nqi siab sib txawv ntawm PF 2 Tau Δ PF thiab characterizes tus txhaj tshuaj siab poob rau hauv lub barrel ntawm tus txhaj tshuaj molding tshuab nyob rau theem sau. Raws li muaj nyob rau hauv daim duab 2, Tus sau phaseInjection siab poob rau hauv lub barrel ntawm lub tshuab txhaj tshuaj Δ PF = 1 649-946=703bar.

Rau cov lus teb ntawm tus txhaj tshuaj siab poob rau hauv cov theem barrel, tom qab lub siab poob, Qhov txawv ntawm lub siab tus nqi PP2 Δ P yog lub siab poob rau hauv lub siab tus nqi nyob rau hauv lub barrel thiab cov barrel yog lub siab poob rau hauv lub barrel thiab tus txhaj siab poob Δ PP=999-732=267 bar.

Tsom xam cov ntaub ntawv mus sib hais

Kuaj cov ntaub ntawv collation

Los ntawm txoj kev saum toj no, Qhov kev kuaj ntawd ntawm txhua pab pawg neeg ntawd sorted thiab cov ntaub ntawv kuaj ntawd constructed. Nraud 3 132 Pawg txhaj tshuaj tiv thaiv kab mob tau ua rau 6 khoom siv. Vim qhov chaw txwv, Rooj 2 tsuas muaj ib co kev kuaj ntawd xwb.

Linear regression tsom xam cov ntaub ntawv mus sib hais

Raws li cov ntaub ntawv kuaj, Δ PF THIAB PF 1, Δ PF thiab Δ PF V, Δ PF, feem, thiab melt kub T, Raws li muaj nyob rau hauv Daim Duab 3 Daim Duab 5.

Scatter zajlus yog ib qhov zoo graphical txoj kev [6] Txiav txim seb puas muaj kev twb kev txuas, qauv, los sis tiam sis sib 2 zauv sib txawv. Yog li ntawd, Ib sib piv ntawm cov scatter tis nyob rau hauv daim duab 3 Daim Duab 5 Qhia tau hais tias muaj ib tug correlation correlation ntawm Δ PF thiab PF 1 (Tus qauv ntawm plotted ntsiab lus leans ntawm qab mus topright

Obkew, qab hau tias tus PF 1 Qhov tseem ceeb tsub kom nrog Δ PF qhov tseem ceeb, implying ib correlation zoo correlation [5]), Thaum txhaj velocity V thiab melt kub T NW nyuam qhuav correlated.

Tus Pearson correlation coefficient hauv tej kev kawm yog lug siv los ntsuas cov kawm ntawv ntawm correlation ntawm ob variables, qhov tseem ceeb ntawm-1 thiab 1. taum mog

Tus inferior correlation coefficient feem ntau yog uas muaj tuaj los ntawm tsab ntawv R, Nws tus nqi yog tsis zoo qhia ib correlation tsis zoo correlation ntawm variables, Thiab yog mus qhia ib correlation zoo correlation, thiab ntau dua tus nqi ntawm R, Qhov ntau dua correlation ntawm tus correlation 2 txheej txheem. Yog li ntawd, Tus Pearson correlation coefficient ntawm lub Δ PF thiab PF 1, V, T, Thiab 3 cov ntaub ntawv teev tseg,

Kiv cua, Siv los ntsuas cov kawm ntawv ntawm correlation ntawm Δ PF thiab cov 3 hloov. R2=0.981, Δ PF thiab V naj npawb rau 1 Cov ntaub ntawv teev tseg rau Δ PF thiab PF 1

Raws li R2=0.282 hauv lub txheej thiab R2=0.534 hauv cov ntaub ntawv T teev, Qhov ntau tshaj correlation yog txiav txim tau ntawm Δ PF thiab PF 1, Thiab ces cov xov tooj nyob ntawm minimizing lub caij ntuj sov squares ntawm qhov yuam kev

Siab poob coefficient ntawm cov yas. Raws li cov regression tsom xam txoj kev, Rau ib tug xov tooj ntawm txheeb cais

Cov Ntaub Ntawv Zauv Mathematical processing, Txiav txim seb cov correlation ntawm dependent variables thiab ib co neeg sab nraud variables, tsim kom muaj correlation regression equation (kev ua kom ib tug muaj nuj nqi) [8], Ua lub tshuab txhaj tshuaj barrel txhaj siab poob prediction hom, yuav optimize tus txhaj siab teev nyob rau hauv txoj kev mus sib hais, pab cov technicians sai nrhiav kev tsim nyog siab thiab siab. Vim hais tias qhov kev kuaj ntawd txwv tsis pub muaj mob, Tus txhaj tshuaj los coefficient ntawm tus barrel txhaj tshuaj ntawm txawv molding cav tov tsis kawm thiab analyzed, Thiab nws yuav tsis tseeb ntawm lub siab poob coefficient ntawm tus txhaj barrel thiab cov khoom parameters ntawm tus txhaj tshuaj molding tshuab. Nrog lub deepening ntawm txoj kev tshawb fawb, Ntxiv thiab ntau nyob rau hauv cov barrel

Raws li cov mathematical optimization txheej txheem ntawm qhov zoo tshaj plaws matching [(7]

square txoj kev),

Tus influencing yam hais txog qhov txhaj tshuaj siab yuav tau mined rau perfection

Haum qhov zoo matching muaj nuj nqi ntawm Δ PF thiab PF 1 Cov ntaub ntawv kom tau cov Δ PF txog PF txog PF 1 kev hais lus:

ΔPF =0.410 1×PF1 (1)

mis nyuj (1) Yuav siv tau ua ib tug qauv prediction qauv rau lub siab poob rau hauv lub barrel ntawm lub tshuab txhaj tshuaj nyob rau theem sau. Ua tau ntau lawm, Tus txhaj siab tus nqi siab nyob rau hauv lub barrel ntawm lub tshuab txhaj tshuaj yog yooj yim tau txais, Li ntawd, cov qauv no muaj dav applicability.

mob(nurses), zoo ib yam li, Raws li txoj kev tshawb no kuaj cov ntaub ntawv, kos zajlus ntawm lub siab tuav theem, Raws li muaj nyob rau hauv Daim Duab 6, Thiab haum qhov zoo matching muaj nuj nqi ntawm lub siab poob Δ PP hauv lub barrel thiab lub siab txhaj siab PP1 cov ntaub ntawv teev nyob rau hauv lub siab tuav theem:

ΔPP =0.258 9×PP1

Cov kev tshawb fawb saum toj no qhia tias cov tsis txhaj siab yog tsis correlated nrog tus txhaj speed thiab melt kub, Tiam sis yog xav associated nrog tus txhaj siab nyob rau hauv lub barrel, thiab yuav txiav txim tau los ntawm constructing (fx) =kx functionShooting siab poob, x yog tus barrel txhaj siab ntawm lub tshuab txhaj tshuaj molding tshuab, thiab k yog lub pressureloss efficiency. Tas lawm, sib npaug (1) Thiab (2) Qhia cov phenomenon yooj yim phenomenon ntawm txawv siab poob coefficient hauv lub barrel thaum txawv txhaj theem (sau thiab qib siab).

tag nrho

Ntev mus ntev tuaj, Engineers muaj tsis muaj kev tshawb fawb rau tus txhaj tshuaj siab poob rau hauv lub barrel ntawm tus txhaj tshuaj molding tshuab. Feem ntau, Cov simulation tsom xam feem ntau tsuas considers lub siab hloov mus rau hauv lub mold, Li ntawd, tus kwv yees li ntawm tus txhaj tshuaj deviates. Ib tug qauv tshiab ntawm txhaj siab poob yog ices: Δ P =k P, Δ P =k P; Qhov twg k yog tus sau thiab siab preservation stepPressure poob coefficient ntawm cov yas. Raws li cov regression tsom xam txoj kev, Rau ib tug xov tooj ntawm txheeb cais

Cov Ntaub Ntawv Zauv Mathematical processing, Txiav txim seb cov correlation ntawm dependent variables thiab ib co neeg sab nraud variables, tsim kom muaj correlation ntawm regression equation (kev ua kom ib tug muaj nuj nqi) [8], Siv cov barrel txhaj tshuaj poob prediction hom, yuav optimize tus txhaj siab teev nyob rau hauv txoj kev mus sib hais, pab cov technicians sai nrhiav kev tsim nyog siab thiab siab. Vim hais tias qhov kev kuaj ntawd txwv tsis pub muaj mob, Tus txhaj tshuaj los coefficient ntawm tus barrel txhaj tshuaj ntawm txawv molding cav tov tsis kawm thiab analyzed, Thiab nws yuav tsis tseeb ntawm lub siab poob coefficient ntawm tus txhaj barrel thiab cov khoom parameters ntawm tus txhaj tshuaj molding tshuab. Nrog lub deepening ntawm txoj kev tshawb fawb, Ntxiv thiab ntau yog nyob rau hauv lub barrelThe influencing yam hais txog qhov txhaj tshuaj siab yuav tau mined rau perfectionAnd txhim kho cov qauv prediction qauv ntawm txhaj tshuaj siab poob rau hauv lub barrel ntawm injection molding tshuab, Thiab txhawb txoj kev txhim kho ntawm lub siab solver ntawm flow simulation tsom xam software, thiab txhawb txoj kev loj hlob ntawm txoj kev txhaj tshuaj optimization txoj kev.

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