Hauv kev ntsuas qhov tseeb thiab kev tsim khoom siab heev, kev nrhiav qhov tseeb yog kev sib ntaus sib tua tsis tu ncua nrog cov yam ntxwv ntawm lub cev. Ntawm cov no, qhov kub thiab txias hloov pauv yog ib qho ntawm cov yeeb ncuab loj tshaj plaws. Txawm tias lub Tshuab Ntsuas Sib Koom Tes (CMM) lossis laser interferometer uas zoo tshaj plaws tsis tuaj yeem them rau tus qauv siv uas hloov pauv nrog lub mercury. Rau cov kws ntsuas metrologists thiab cov kws tswj xyuas zoo, kev xaiv tus kav plaub fab tseem ceeb - lub cuab yeej tseem ceeb rau kev txheeb xyuas qhov perpendicularity, parallelism, thiab straightness - yog qhov tseem ceeb heev.
Keeb kwm los, granite yog tus vaj ntxwv tsis muaj kev sib cav ntawm cov hauv paus metrology thiab cov squares. Txawm li cas los xij, thaum kev kam rau siab nruj mus rau hauv qhov ntau ntawm sub-micron, cov khoom siv ceramics kev lag luam siab heev tau tshwm sim los ua tus neeg sib tw muaj zog. Tsab xov xwm no muab kev sib piv tob tob ntawm granite thiab ceramic square rulers, tshwj xeeb tshaj yog kev tshuaj xyuas lawv qhov kev ruaj khov thermal kom pab koj txiav txim siab seb cov khoom siv twg zoo tshaj plaws rau koj qhov chaw ua haujlwm precision.
Lub Physics ntawm Thermal Stability: Vim Li Cas Nws Tseem Ceeb
Yuav kom nkag siab txog kev xaiv ntawm cov ntaub ntawv, ib tug yuav tsum xub nkag siab txog lub cev ntawm kev nthuav dav thermal. Txhua yam khoom nthuav dav thaum cua sov thiab cog lus thaum txias. Hauv kev ntsuas qhov tseeb, qhov kev hloov pauv lub cev no raug ntsuas los ntawm Coefficient of Thermal Expansion (CTE). CTE qis dua, cov khoom siv ruaj khov dua thoob plaws qhov kub hloov pauv.
Hauv ib lub khw muag tshuab lossis chav kuaj xyuas, qhov kub tsis tshua ruaj khov. HVAC voj voog, lub hnub ci los ntawm qhov rais, cua sov tsim los ntawm cov tshuab nyob ze, thiab txawm tias lub cev kub ntawm cov neeg ua haujlwm tuaj yeem tsim cov thermal gradients. Yog tias tus pas ntsuas plaub fab muaj CTE siab, cov kev hloov pauv me me no ua rau lub cuab yeej hloov pauv qhov loj me thiab cov duab, ua rau muaj qhov yuam kev ntsuas uas tuaj yeem loj dua qhov kev kam rau siab ntawm qhov ntsuas.
Txawm hais tias hlau thiab txhuas yog cov khoom siv dav dav hauv cov qauv tshuab, lawv muaj CTEs siab dua (kwv yees li 11.6 x 10⁻⁶/°C rau hlau thiab 23 x 10⁻⁶/°C rau txhuas). Txhawm rau kom ua tiav qhov tseeb dua, kev lag luam tau tig mus rau cov ntaub ntawv tsis yog hlau: Granite thiab Ceramic.
Granite: Tus Qauv Uas Tau Kuaj Los Ntawm Lub Sijhawm
Granite tau yog lub hauv paus ntawm kev ntsuas qhov tseeb tau ntau tshaj ib puas xyoo. Tshwj xeeb, "Jinan Green" lossis "Tuam Tshoj Dub" granite, uas tau khawb ntau hauv thaj chaw zoo li Shandong, yog lub npe nrov rau nws cov nplej zoo thiab kev ruaj khov.
1. Cov Qauv Thermal ntawm Granite
Feem ntau Granite muaj CTE kwv yees li 4.6 x 10⁻⁶/°C txog 6.0 x 10⁻⁶/°C. Txawm hais tias qhov no zoo dua li hlau (kwv yees li ib nrab ntawm qhov nthuav dav), nws tsis yog xoom. Txawm li cas los xij, granite muaj qhov zoo tshwj xeeb thermal: thermal inertia. Granite yog cov khoom siv ntom ntom, loj heev uas teb qeeb rau qhov hloov pauv kub. Nws tsis nthuav dav tam sim ntawd thaum chav tsev kub nce siab; es, nws nqus cua sov maj mam. Qhov "lag" no tuaj yeem pab tau rau hauv cov chaw uas muaj kev hloov pauv kub sai tab sis luv luv, vim tias lub hauv paus ntawm granite square tseem ruaj khov txawm tias qhov kub ntawm qhov chaw hloov pauv luv luv.
Feem ntau Granite muaj CTE kwv yees li 4.6 x 10⁻⁶/°C txog 6.0 x 10⁻⁶/°C. Txawm hais tias qhov no zoo dua li hlau (kwv yees li ib nrab ntawm qhov nthuav dav), nws tsis yog xoom. Txawm li cas los xij, granite muaj qhov zoo tshwj xeeb thermal: thermal inertia. Granite yog cov khoom siv ntom ntom, loj heev uas teb qeeb rau qhov hloov pauv kub. Nws tsis nthuav dav tam sim ntawd thaum chav tsev kub nce siab; es, nws nqus cua sov maj mam. Qhov "lag" no tuaj yeem pab tau rau hauv cov chaw uas muaj kev hloov pauv kub sai tab sis luv luv, vim tias lub hauv paus ntawm granite square tseem ruaj khov txawm tias qhov kub ntawm qhov chaw hloov pauv luv luv.
2. Kev Pab Txo Kev Nyuaj Siab Ntuj
Ib qho ntawm cov khoom muaj nqis tshaj plaws ntawm granite yog nws keeb kwm geological. Vim tias nws tau tsim los ntau lab xyoo, granite zoo tsis muaj kev ntxhov siab sab hauv. Tsis zoo li cov hlau, uas xav tau kev laus dag lossis kev kho cua sov kom txo tau kev ntxhov siab thaum lub sijhawm casting lossis machining, granite ruaj khov. Nws yuav tsis warp lossis twist dhau sijhawm vim yog kev so ntawm kev ntxhov siab sab hauv, ua kom ntseeg tau tias nws cov geometry tseem muaj tseeb rau ntau xyoo caum.
Ib qho ntawm cov khoom muaj nqis tshaj plaws ntawm granite yog nws keeb kwm geological. Vim tias nws tau tsim los ntau lab xyoo, granite zoo tsis muaj kev ntxhov siab sab hauv. Tsis zoo li cov hlau, uas xav tau kev laus dag lossis kev kho cua sov kom txo tau kev ntxhov siab thaum lub sijhawm casting lossis machining, granite ruaj khov. Nws yuav tsis warp lossis twist dhau sijhawm vim yog kev so ntawm kev ntxhov siab sab hauv, ua kom ntseeg tau tias nws cov geometry tseem muaj tseeb rau ntau xyoo caum.
3. Kev Ruaj Kho thiab Kev Txij Nkawm
Granite yog ib yam khoom uas tawv heev (Mohs hardness 6-7) thiab tiv taus xeb. Nws tsis xeb, ua rau nws tiv taus cov av noo uas ua rau cov cuab yeej hlau puas tsuaj. Yog tias lub granite square raug poob lossis ntaus, cov khoom siv feem ntau yuav tawg lossis lwj es tsis yog burr. Lub burr ntawm lub steel square tuaj yeem ua rau qhov kev ntsuas puas tsuaj; ib qho me me ntawm lub granite square, txawm tias tsis zoo nkauj, feem ntau tsis cuam tshuam rau qhov tseeb ntawm lub dav hlau siv.
Granite yog ib yam khoom uas tawv heev (Mohs hardness 6-7) thiab tiv taus xeb. Nws tsis xeb, ua rau nws tiv taus cov av noo uas ua rau cov cuab yeej hlau puas tsuaj. Yog tias lub granite square raug poob lossis ntaus, cov khoom siv feem ntau yuav tawg lossis lwj es tsis yog burr. Lub burr ntawm lub steel square tuaj yeem ua rau qhov kev ntsuas puas tsuaj; ib qho me me ntawm lub granite square, txawm tias tsis zoo nkauj, feem ntau tsis cuam tshuam rau qhov tseeb ntawm lub dav hlau siv.
Cov Khoom Siv Ua Los Ntawm ...
Raws li kev lag luam aerospace thiab semiconductor pib thov kom muaj qhov tseeb hauv ntau yam microns thiab nanometers, cov granite txheem pib qhia nws cov kev txwv. Qhov kev thov no tau tsav tsheb tsim cov khoom siv ceramics kev lag luam zoo, feem ntau yog Alumina (Aluminum Oxide) thiab Silicon Carbide (SiC).
1. Qhov Zoo Tshaj Plaws ntawm Cov Khoom Siv Ua Los Ntawm Pob Zeb
Feem ntau cov khoom siv ua los ntawm cov khoom siv ceramics muaj CTE qis dua li granite, feem ntau ntawm 2.0 x 10⁻⁶/°C thiab 5.5 x 10⁻⁶/°C, nyob ntawm seb cov qauv twg. Piv txwv li, Silicon Carbide yog qhov tshwj xeeb rau nws qhov kev nthuav dav thermal qis heev.
Feem ntau cov khoom siv ua los ntawm cov khoom siv ceramics muaj CTE qis dua li granite, feem ntau ntawm 2.0 x 10⁻⁶/°C thiab 5.5 x 10⁻⁶/°C, nyob ntawm seb cov qauv twg. Piv txwv li, Silicon Carbide yog qhov tshwj xeeb rau nws qhov kev nthuav dav thermal qis heev.
Qhov tseem ceeb tshaj, cov khoom siv ceramic muaj cov thermal conductivity zoo dua li cov granite. Txawm hais tias granite insulates (uas tuaj yeem ua rau qhov kub thiab txias hloov pauv qhov twg ib sab ntawm lub square kub dua li lwm sab), ceramic dissipates cua sov sib npaug ntau dua. Qhov no txhais tau tias lub ceramic square ncav cuag qhov sib npaug thermal nrog chav sai dua, txo qhov kev pheej hmoo ntawm kev ntsuas yuam kev los ntawm cov thermal gradients hauv cov cuab yeej nws tus kheej.
2. Kev Ruaj Khob thiab Kev Ruaj Khob
Hauv kev ntsuas, kev ruaj khov yog tus kav tseem ceeb. Cov khoom ua los ntawm av nplaum muaj Modulus of Elasticity (Young's Modulus) siab dua li granite—feem ntau siab dua ob mus rau peb zaug. Qhov no txhais tau tias lub voos xwmfab ceramic tawv dua. Hauv qab nws qhov hnyav, lossis thaum tuav, tus kav ceramic yuav hloov pauv tsawg dua li granite ib qho ntawm tib qhov loj me. Qhov sib piv ntawm kev ruaj khov thiab qhov hnyav no tso cai rau cov chaw tsim khoom tsim cov voos xwmfab ceramic uas sib dua tab sis tawv dua, txo qhov hnyav ntawm cov neeg ua haujlwm thaum tswj hwm qhov tiaj tiaj sub-micron.
Hauv kev ntsuas, kev ruaj khov yog tus kav tseem ceeb. Cov khoom ua los ntawm av nplaum muaj Modulus of Elasticity (Young's Modulus) siab dua li granite—feem ntau siab dua ob mus rau peb zaug. Qhov no txhais tau tias lub voos xwmfab ceramic tawv dua. Hauv qab nws qhov hnyav, lossis thaum tuav, tus kav ceramic yuav hloov pauv tsawg dua li granite ib qho ntawm tib qhov loj me. Qhov sib piv ntawm kev ruaj khov thiab qhov hnyav no tso cai rau cov chaw tsim khoom tsim cov voos xwmfab ceramic uas sib dua tab sis tawv dua, txo qhov hnyav ntawm cov neeg ua haujlwm thaum tswj hwm qhov tiaj tiaj sub-micron.
3. Hnav Tsis Taus
Cov khoom siv ua los ntawm av nplaum yog cov khoom siv uas nyuaj tshaj plaws uas cov kws tsim vaj tsev paub, nyuaj dua li cov granite. Qhov no ua rau lawv yuav luag tsis raug khawb thaum siv ib txwm. Hauv cov chaw soj ntsuam ntau qhov chaw uas lub square raug swb tas li rau ntawm cov khoom lossis cov khoom siv, lub ceramic square yuav khaws nws qhov tiav thiab geometry ntev dua li nws cov granite counterpart.
Cov khoom siv ua los ntawm av nplaum yog cov khoom siv uas nyuaj tshaj plaws uas cov kws tsim vaj tsev paub, nyuaj dua li cov granite. Qhov no ua rau lawv yuav luag tsis raug khawb thaum siv ib txwm. Hauv cov chaw soj ntsuam ntau qhov chaw uas lub square raug swb tas li rau ntawm cov khoom lossis cov khoom siv, lub ceramic square yuav khaws nws qhov tiav thiab geometry ntev dua li nws cov granite counterpart.
Lub Taub Hau Mus Rau Lub Taub Hau: Kev Sib Tw Thermal Stability
Thaum piv ob yam khoom siv nruj me ntsis rau ntawm kev ruaj khov thermal, peb yuav tsum saib ob yam: qhov nrawm nthuav dav (CTE) thiab kev teb thermal.
Xwm Txheej A: Ib puag ncig uas Tswj (Chav CMM)
Nyob rau hauv ib puag ncig tswj hwm nruj me ntsis (20 ° C ± 0.5 ° C), ob qho tib si cov ntaub ntawv ua haujlwm tau zoo heev. Txawm li cas los xij, ceramic tuav me ntsis ntug vim nws qis dua CTE. Yog tias koj ntsuas qhov chaw nrog kev kam rau siab ntawm ± 1 micron, qhov qis dua ntawm kev nthuav dav ntawm ceramic muab qhov kev nyab xeeb loj dua tiv thaiv qhov kub thiab txias me me uas tshwm sim txawm tias nyob hauv cov chaw kuaj mob zoo tshaj plaws.
Nyob rau hauv ib puag ncig tswj hwm nruj me ntsis (20 ° C ± 0.5 ° C), ob qho tib si cov ntaub ntawv ua haujlwm tau zoo heev. Txawm li cas los xij, ceramic tuav me ntsis ntug vim nws qis dua CTE. Yog tias koj ntsuas qhov chaw nrog kev kam rau siab ntawm ± 1 micron, qhov qis dua ntawm kev nthuav dav ntawm ceramic muab qhov kev nyab xeeb loj dua tiv thaiv qhov kub thiab txias me me uas tshwm sim txawm tias nyob hauv cov chaw kuaj mob zoo tshaj plaws.
Xwm Txheej B: Lub Tsev Muag Khoom lossis Ib puag ncig uas hloov pauv tau
Hauv pem teb khw, qhov kub thiab txias tuaj yeem hloov pauv ntau degrees thoob plaws hnub. Ntawm no, qhov kev xaiv yog qhov sib txawv me ntsis.
Qhov kub ntawm granite ua rau nws hloov pauv qeeb qeeb. Yog tias lub khw kub ib teev thiab tom qab ntawd txias dua, lub granite square yuav tsis tshua pom qhov hloov pauv, thiab nws tseem nyob ruaj khov thoob plaws lub voj voog.
Cov khoom siv ua los ntawm av nplaum, uas muaj kev ua tau zoo dua ntawm cov cua sov, yuav teb sai dua. Txawm li cas los xij, vim tias nws qhov kev nthuav dav tag nrho ib qib qis heev, qhov loj ntawm qhov yuam kev tseem tsawg heev. Rau kev ntsuas ntev uas qhov kub thiab txias ib puag ncig yuav hloov pauv tas li (piv txwv li, txij thaum sawv ntxov mus txog tav su), cov khoom siv ua los ntawm av nplaum feem ntau zoo dua vim tias nws qhov kev nthuav dav tag nrho hla qhov kev hloov pauv ntawd yuav qis dua li cov pob zeb granite.
Hauv pem teb khw, qhov kub thiab txias tuaj yeem hloov pauv ntau degrees thoob plaws hnub. Ntawm no, qhov kev xaiv yog qhov sib txawv me ntsis.
Qhov kub ntawm granite ua rau nws hloov pauv qeeb qeeb. Yog tias lub khw kub ib teev thiab tom qab ntawd txias dua, lub granite square yuav tsis tshua pom qhov hloov pauv, thiab nws tseem nyob ruaj khov thoob plaws lub voj voog.
Cov khoom siv ua los ntawm av nplaum, uas muaj kev ua tau zoo dua ntawm cov cua sov, yuav teb sai dua. Txawm li cas los xij, vim tias nws qhov kev nthuav dav tag nrho ib qib qis heev, qhov loj ntawm qhov yuam kev tseem tsawg heev. Rau kev ntsuas ntev uas qhov kub thiab txias ib puag ncig yuav hloov pauv tas li (piv txwv li, txij thaum sawv ntxov mus txog tav su), cov khoom siv ua los ntawm av nplaum feem ntau zoo dua vim tias nws qhov kev nthuav dav tag nrho hla qhov kev hloov pauv ntawd yuav qis dua li cov pob zeb granite.
Lwm Yam Tseem Ceeb ntawm Kev Xaiv
Txawm hais tias qhov ruaj khov ntawm qhov kub thiab txias yog lub ntsiab lus tseem ceeb, lwm yam feem ntau yog qhov txiav txim siab zaum kawg rau kev yuav khoom.
1. Tus nqi thiab qhov nyuaj ntawm kev tsim khoom
Granite yog ib yam khoom siv ntuj tsim. Txawm hais tias pob zeb zoo kim heev los, feem ntau nws pheej yig dua li cov khoom siv av nplaum zoo heev. Cov txheej txheem tsim khoom rau granite suav nrog kev txiav thiab khawb tes, uas yog siv zog ua haujlwm ntau tab sis tau tsim zoo.
Cov khoom ua los ntawm av nplaum, ntawm qhov tod tes, yog cov khoom siv ua los ntawm ...
Granite yog ib yam khoom siv ntuj tsim. Txawm hais tias pob zeb zoo kim heev los, feem ntau nws pheej yig dua li cov khoom siv av nplaum zoo heev. Cov txheej txheem tsim khoom rau granite suav nrog kev txiav thiab khawb tes, uas yog siv zog ua haujlwm ntau tab sis tau tsim zoo.
Cov khoom ua los ntawm av nplaum, ntawm qhov tod tes, yog cov khoom siv ua los ntawm ...
2. Kev puas tsuaj thiab kev cuam tshuam
Qhov no yog Achilles lub pob taws ntawm cov khoom siv ceramic. Txawm hais tias nws nyuaj heev, nws kuj tawg yooj yim. Yog tias lub voos xwmfab ceramic poob, nws yuav tawg lossis tawg sai heev. Granite, txawm hais tias tawv, zam txim tau zoo dua. Kev poob yuav ua rau muaj qhov tawg lossis tawg, tab sis nws yuav tsis tawg yooj yim. Rau cov chaw uas cov cuab yeej raug tsiv ntau zaus lossis tuav los ntawm ntau tus neeg ua haujlwm, granite muaj qib kev tiv taus kev cuam tshuam uas ceramic tsis ua.
Qhov no yog Achilles lub pob taws ntawm cov khoom siv ceramic. Txawm hais tias nws nyuaj heev, nws kuj tawg yooj yim. Yog tias lub voos xwmfab ceramic poob, nws yuav tawg lossis tawg sai heev. Granite, txawm hais tias tawv, zam txim tau zoo dua. Kev poob yuav ua rau muaj qhov tawg lossis tawg, tab sis nws yuav tsis tawg yooj yim. Rau cov chaw uas cov cuab yeej raug tsiv ntau zaus lossis tuav los ntawm ntau tus neeg ua haujlwm, granite muaj qib kev tiv taus kev cuam tshuam uas ceramic tsis ua.
3. Qhov Hnyav thiab Ergonomics
Rau cov duab plaub fab loj (piv txwv li, 1000mm thiab siab dua), qhov hnyav dhau los ua qhov tseem ceeb. Granite yog qhov ntom heev (kwv yees li 2900-3000 kg / m³). Kev txav mus rau ib lub duab plaub fab granite loj xav tau hoists lossis ntau tus neeg ua haujlwm. Ceramic, tshwj xeeb tshaj yog Silicon Carbide lossis hollow-structure Alumina, tuaj yeem sib dua thaum tseem tswj tau qhov ruaj khov. Qhov no ua rau ceramic yog qhov kev xaiv zoo heev rau cov khoom siv tshuaj xyuas loj uas qhov hnyav txo qis txhim kho kev tuav thiab lub tshuab dynamics.
Rau cov duab plaub fab loj (piv txwv li, 1000mm thiab siab dua), qhov hnyav dhau los ua qhov tseem ceeb. Granite yog qhov ntom heev (kwv yees li 2900-3000 kg / m³). Kev txav mus rau ib lub duab plaub fab granite loj xav tau hoists lossis ntau tus neeg ua haujlwm. Ceramic, tshwj xeeb tshaj yog Silicon Carbide lossis hollow-structure Alumina, tuaj yeem sib dua thaum tseem tswj tau qhov ruaj khov. Qhov no ua rau ceramic yog qhov kev xaiv zoo heev rau cov khoom siv tshuaj xyuas loj uas qhov hnyav txo qis txhim kho kev tuav thiab lub tshuab dynamics.
Kev Txiav Txim Siab: Ib Phau Ntawv Qhia rau Cov Kws Ua Haujlwm
Yog li, koj yuav tsum xaiv cov khoom siv twg rau koj qhov project tom ntej?
Xaiv Granite Yog tias:
- Kev siv nyiaj yog qhov kev txwv tseem ceeb: Koj xav tau qhov kev ua haujlwm siab tab sis tsis tuaj yeem piav qhia txog tus nqi siab ntawm cov khoom siv ceramic.
- Ib puag ncig ruaj khov heev: Koj lub chaw kuaj mob tswj qhov kub thiab txias kom ruaj khov, txo qhov zoo ntawm cov khoom siv ceramic's CTE qis.
- Kev ruaj khov yog qhov txhawj xeeb: Cov cuab yeej yuav raug tsiv mus tas li lossis siv rau hauv qhov chaw uas muaj kev pheej hmoo ntawm kev poob tsis raug.
- Koj xav tau lub dav hlau ruaj khov: Rau kev tshuaj xyuas dav dav, cov phaj nto, thiab kev teeb tsa ua haujlwm, granite qhov ruaj khov yog ntau tshaj qhov txaus.
Xaiv Cov Khoom Siv Ceramic Yog tias:
- Koj tab tom thawb qhov txwv ntawm qhov tseeb: Koj tab tom ua haujlwm nrog kev kam rau siab sub-micron (piv txwv li, semiconductor, optics, aerospace) qhov twg txhua feem ntawm kev nthuav dav thermal suav.
- Koj xav tau kev ruaj khov siab: Daim ntawv thov yuav tsum tau ib lub duab plaub fab ntev, nyias uas yuav tsum tsis txhob tig mus rau hauv qab nws qhov hnyav.
- Kev hloov pauv ntawm cov cua sov yog qhov teeb meem: Koj qhov chaw ib puag ncig muaj cua sov tsis sib xws, thiab koj xav tau cov khoom siv uas ua kom qhov kub sib npaug sai sai kom tsis txhob muaj kev cuam tshuam.
- Qhov hnyav yog ib qho tseem ceeb: Koj xav tau ib lub cuab yeej siv loj uas sib zog txaus los tuav tes lossis los ntawm kev siv tshuab sib zog dua.
Xaus lus
Hauv kev sib cav txog Granite piv rau Ceramic rau cov kav plaub fab, tsis muaj ib yam khoom "zoo tshaj plaws" - tsuas yog cov khoom zoo tshaj plaws rau koj daim ntawv thov tshwj xeeb. Granite tseem yog lub zog ua haujlwm ntawm kev lag luam, muab kev sib xyaw ua ke ntawm kev ruaj khov, kev siv tau ntev, thiab kev siv nyiaj tsim nyog. Nws yog tus qauv txhim khu kev qha uas tau ua haujlwm tsim khoom zoo rau ib puas xyoo.
Txawm li cas los xij, rau cov neeg ua haujlwm ntawm ciam teb ntawm kev ua haujlwm raug, qhov twg kev ruaj khov thermal yog qhov txwv hauv kev tswj xyuas zoo, cov khoom siv ceramics kev lag luam muab cov kev daws teeb meem zoo dua. Nrog rau kev nthuav dav thermal qis dua, kev ruaj khov siab dua, thiab kev sib npaug thermal sai dua, cov plaub fab ceramic yog qhov kev xaiv zoo tshaj plaws rau cov haujlwm metrology uas xav tau tshaj plaws.
Lub sijhawm tshaj tawm: Plaub Hlis-27-2026