Izindlela zokusebenzisa i-wire EDM ukuze zibe yisibonelo esihle kumsebenzi wokugcina emaphoyinteni okuhlukeneyo

Kuvikela Ukuchitha Kwemithwalo Ne-temperature Yomhlaba Ukuze Kwenziwe Ukuthembeka Kwezinkambo Zokusebenza Ngamathwalo Okukhanya

Ukuvikela ukuchitha kwemithwalo kuyisibuko esikhulu sokulungisa izinkambo zokusebenza ngamathwalo okukhanya ekuseni lapho kufakwa emaphoyinti amahle. Umpho wokuchitha awukwazi ukuphakama emaseleni yezinkambo nezincwadi zokusebenza, okubangela ukukhanya okungafanele nokuchitha kwezinye izinto ngokuthe ngaphambili. Ukuvikela ukuchitha kwemithwalo kuyakusinda izincwadi zokusebenza futhi kuyakusiza ngqo ekuthambekeni kwezinhlobo nezinhlobo zokusebenza kwezinkambo zokusebenza ngamathwalo okukhanya.

Faka neyakhalibhire ama-system athembekile yokuvikela ukuchitha kwemithwalo ukuze kuvikeleke ≤55% RH ne-20–25°C

Amathuba okuhambisana ngaphandle kwezinhlobo eziyayisho kuzokhuthaza ukuphakama kwesikhathi phakathi kwezinto zokusebenza nezihlangu—amathuba amancane okuhambisana okuyakugcina ukuthi kubonakaliswe ngokuthi kuhambisana. Umsebenzi wokulungisa isikhundla sokusebenza uyadinga izinkampani zokulungisa isikhathi esihle, izihlangu zokuvula ezinamandla, nezihlangu zokuvula ezilandelwayo ukuze zikhubaze umoya waphandle nokukhanya. Ukulungisa kufanekile kwi-ISO/IEC 17025 kuvumela ukuthi izinhlobo zokuhlola isikhathi zibe ngaphakathi kwe-±0.5 °C futhi izinhlobo zokuhlola ukukhanya kwezinye izinsuku zihamba ngaphansi kwe-1% ngemva yezinsuku ezintathu. Kumaqembu ayezizinhlobo zokusebenza kwe-wire EDM, isithombe sesikhundla sokusebenza esifanekile ngalasemthwakini sibonisa iziphakamiso ezingenakubhekwa ngaphandle:

Isisistemu sesiqondi sezulu kufanele sifake isibonelo sezimithandazo zokuphakama kwesikhathi esihlukileyo sokusebenza kwe-wire EDM. Isikhala sekholo esisodwa esilinkisiwe nesikontrola se-HVAC sivinjelisa izindawo eziphakeme kakhulu ezibalulekileyo kusukela kuzindlela zokusebenza ngokuphakama kakhulu kwezinsuku eziningi. Emva kokufakwa, ukubuyisela kwezinhlekehleke—kungaphakathi kwezinhlekehleke zokuphakama kwezindawo zokusebenza—kuthiwa ukuthi akukho indawo efika ku-25 °C, nakuba kunezinsuku zokuphakama kakhulu zomnyaka.

Sebenzisa izinhlekehleke zokubona ukuguqula kwesikhathi nezintambo emva kwezinhlekehleke zokubona ukuguqula kwesikhathi nezintambo zokusebenza kwe-wire EDM ukuze ubone ukuguqula kwesikhathi esincinci

Beka ama-hygrothermographs okugcina idatha ngaphakathi kwamamitha angu-1-2 e-EDM yocingo ukuze uthwebule izindawo ezincane ezingabanjwanga yizinzwa ezifakwe ophahleni. Lezi zinsimbi ziqopha ngezikhathi zemizuzwana engama-30 noma ngaphansi, zembula ama-spikes esikhashana—njengalawo abangelwa ukuvuleka kweminyango ye-workshop noma i-assistant dryer cycling. Ukujikijela okungazelelwe kwe-10% RH ngaphezu kwemizuzu eyi-15, isibonelo, kungaphakamisa iphuzu lamazolo ngokwanele ukwakha ifilimu encane yomswakama kuma-linear rails—isampula esekelwe ekushintsheni kwesimo (isb., kanye ngeshifti ngayinye) ingaphuthelwa ngokuphelele. Umkhuba omuhle kakhulu ukuxhumela izinzwa ohlelweni lokuphathwa kwesakhiwo olunemingcele ye-alamu elungisekayo: izexwayiso ku->55% RH noma i-amplitude engu-2 °C zingakapheli imizuzu eyi-10 zivumela ukungenelela ngaphambi kokuba ukuminyana komoya kubeke engcupheni i-servo amplifier noma i-spark generator. Amalogi ethrendi yanyanga zonke nawo asekela ukulungiswa kokubikezela ngokuhlobanisa uhambo lwezemvelo nesikhathi sokuphumula esingahleliwe noma ukuguguleka kwamathuluzi okusheshayo.

Qinisekisa Ubuqotho Boketshezi Lwe-Dielectric kanye Nokulawulwa Kokuqhuba Kwezinto Ezimweni Ezinomswakama Ophakeme

Kwizindawo zokusebenzisa izithuthi ezinomthwakamo, umsindo wokuphatha kwe-dielectric uwathatha amanzi ngokushesha, okuhlela ukungafani kwakhe kwekuphatha. Izithuthi zokuphatha kwe-wire EDM zidinga umsindo onobukhulu be-resistivity ukuze zilinde isikhala sokusuka kwe-spark. Uma akubikwa ngendlela ephambili, ukongezwa kwe-conductivity kuyenza ukusuka kwe-arc, ukungasembezi kwezithuthi, nokungafanele kwezinye zezinyathelo zokugcina. Inqubo enkulu yokulondoloza i-resistivity ne-conductivity iyadingeka ukuze kubhekwe ubukhulu bokugcina.

Yenza ukuzimisela kwe-resistivity ngosuku (isiphumo esidingekayo: >2 MΩ·cm) ukuze usivele ukusuka kwe-arc nokungasembezi kwezithuthi

Ukuhambisa kwezilwanyana zokugqibela kuyisiphumo sokubhekana ngokupheleleyo nokuthi ukusakaza kwezilwanyana kuyisiphumo sokubhekana ngokupheleleyo. Uma amanzi afula, ukuthi izilwanyana ziyasakaza kungabhekani—kubangela ukusakaza okungapheli kusukela ku-“breakdown voltage”. Lokhu kubangela ukusakaza okungafanele, ukuvulwa kwemithombo engafanele, nokufula kwezilwanyana ngokungafanele. Ukubhalwa kwesikhathi esihlwa ngezilwanyana ezivamile zokubhalwa kuzosiza ukuthi ukusakaza kwezilwanyana kubhekele kumkhakha wokusebenza okupheleleyo—lokhu kuyisiphumo sokubhekana ngokupheleleyo. Uma ukubhalwa kuhamba phansi kwalokho, kufuneka kwenziwe isikhathi esihlwa noma kubuyiselwe ngokushesha. Izisensori zokubhalwa kwezilwanyana ezifakwe ngaphakathi—ezizakhiwe ukuthi zibhale isibonelo uma kufika emva kwe-2 MΩ·cm—zisiza ekubhaleni ngokupheleleyo. Amabhuku esikhathi esihlwa asiza ukuthi abonise izindlela zokuguqula kusukela kwezinkambu zokugqibela, kusiza ukuthi kwenziwe ukusebenza ngokushesha. Ukubhekana ngokupheleleyo nokuthi ukusakaza kwezilwanyana kubhekele kumkhakha wokusebenza kusiza ukuthi ukuvulwa kwemithombo kungabi nempilo, kusiza ukuthi akhwele amasikhala, nokuthi ukuthi ukubhekana kwezilwanyana kubhekele kumkhakha wokusebenza. Amashopu athi ayisebenza ngokuthi ayibhekane ngokupheleleyo kule ndlela ayithola ukuthi kunezinkinga zokuguqula kwezilwanyana ngokupheleleyo kusukela ku-18%, njengoko kubonisiwe ngamabhalo esayensi yokubhekana ngokupheleleyo.

Jonga ukusebenza kwe-resin yokugcina izinto ezingavamile kanye nokubuyisela kabusha ngaphambi kokuthi i-conductivity ikhuphule ama-5 μS/cm

Isinkambo sesilika (DI) sibhala amaqanda okuphakanyiswa kusuka kumvumo wokuphakanyiswa, kubeka ukuthi ukuphakanyiswa kwe-mvumo kubheke phansi. Kuzindawo zokuphakanyiswa kwemithi, isinkambo siyabhalwa ngokushisana ngokukhula kwezinto ezingaphakanyiswa ezifanayo nezinto zokuphakanyiswa. Abasebenzi baya kubheka ukuphakanyiswa kwe-mvumo emva kwe-DI ngalunye wesibili—noma ngalunye lesibili ngeminyaka yezinkathi zokuphakanyiswa. Uma ukuphakanyiswa kufika emuva kwe-5 μS/cm (kuyidingana no-~0.2 MΩ·cm yokuqinisa), isinkambo siyagcina ukusebenza kahle, kubhekisa ukuthi kunezinkinga zokugcina nokungafanele kwezinhloso zokusebenza. Ukubuyisa isinkambo kuyizindlela zokuhlanza ngokuphakanyiswa kwezinto zokuphakanyiswa, emva koko kuyizindlela zokuhlaza ngokuphakanyiswa kwezinto zokuphakanyiswa ukuze kubuyiselwe izindawo zokubhala amaqanda. Amasensha awasetshenziswa ngokuzenzakalelayo okuphakanyiswa nokubhala amaqanda ayinamandla ukubhala amaqanda ngokushisana ngokukhula kwezinto zokuphakanyiswa, kubhekisa ukuthi kunezinkinga zokugcina nokungafanele kwezinhloso zokusebenza. Isinkambo esihle sokusebenza kusobala ukuphakanyiswa phansi kwe-5 μS/cm, kubhekisa ukuthi kubuyiselwe ukusebenza kwezinhloso zokusebenza nokubuyiselwa kwezinhloso zokusebenza zokuphakanyiswa njengezimpumpu nezinhloso zokubhala amaqanda. Ukubhala izindlela zokubuyisa isinkambo nezindlela zokuphakanyiswa kwe-mvumo kubhekisa ukuthi kunezinkinga zokugcina nokungafanele kwezinhloso zokusebenza—kubhekisa ukuthi kunezinkinga zokugcina nokungafanele kwezinhloso zokusebenza.

Linda izinto eziphambili zokusebenza nezobuchwepheshe zokugcina kusukela kwe-humidity

Yenza izinspection ngeminyaka emibili yezindlela zokuhlanganisa, izihlanganisi, nezinkampani ukubona ukuthi kune-corrosion noma ukuthi kune-condensation

Umoya omanzi usheshisa ukugqwala kwe-electrochemical kokuxhumana kwethusi kanye nama-terminal ngaphakathi kwamakhabethe emishini ye-EDM yensimbi, okuholela ezimpawini ezingapheli noma ekugoqeni okungazelelwe. Umswakama ongalawulwa uphinde wakhe ukujiya ezindaweni ezibandayo ngesikhathi sokushintsha kwezinga lokushisa, okudala izindlela eziqondile ze-short-circuit. Umkhuba wokuhlola kabili ngesonto uthola ukuqhakaza kokugqwala kwasekuqaleni, ukugoba, noma ukujiya okumhlophe ngaphambi kokuba kujule. Ochwepheshe kufanele bavule amakhabethe okulawula, bahlole izixhumi zamandla, ama-terminal e-servo-drive, kanye nezintambo zomhlabathi ngaphansi kokukhanya okuhle, futhi babhale noma yikuphi ukushintsha kombala noma umswakama. Lapho kungenzeka, kala ukumelana kokuthinta ngemitha ye-milliohm; ukuphakama ngaphezu kwezibonakaliso zokuqala ukujiya okufihliwe. Lokhu kuhlola kuthatha ngaphansi kwemizuzu engama-30 kodwa kuvimbela ukulungiswa okubizayo—ukwehluleka kukagesi okuhlobene nokugqwala kubalelwa cishe ku-40% wesikhathi sokungasebenzi kwe-EDM yensimbi engahleliwe ezitshalweni ezinomswakama ophezulu (Plant Engineering, 2023). Ukuhlanza ngokushesha ngesihlanzi sokuthinta kanye nokushintsha izixhumi ezijiyile kubuyisela ukuthembeka.

Sebenzisa ukufaka umkhawulo wokufana ngokupheleleyo kuma-PCB futhi uvulise indawo yokuxhuma kwe-chiller/resin tank ukuze ubhekise ukufika kwamandla

Ngisho nokulawulwa komswakama ozungezile, umusi wamanzi ungajiya ezindaweni zebhodi lesifunda eliphrintiwe eliveziwe (PCB) ngaphakathi kokunikezwa kwamandla kagesi kwe-wire EDM noma iyunithi ye-CNC. Ukusebenzisa i-conformal coating esezingeni eliphezulu—njenge-silicone noma i-acrylic resin—kudala isithiyo esibonakalayo nesiphefumulayo esivimbela ukukhula kwe-dendritic kanye nemisinga yokuvuza phakathi kwamathrekhi. I-IPC-CC-830-certified coatings imelana nomhwamuko woketshezi lwe-dielectric futhi igcina ukumelana kokushisa okungaphezu kuka-100 MΩ ngemva kwamahora ayi-1,000 ekushiseni okumanzi (85 °C/85% RH). Ngaphandle kwezinto zikagesi, umswakama uvame ukungena ngokusebenzisa izixhumanisi ezingavalwanga kahle: ama-flanges e-chiller-to-tank kanye nezivalo ze-resin-canister kuyizindawo zokungena ezivamile. Ukufaka ama-gasket ajwayelekile ngezimbozo ze-silicone ezivaliwe—nokufaka ungqimba oluncane lwe-silicone sealant engathathi hlangothi eduze kokungena kwekhebula—kuvimba umswakama ekufinyeleleni ama-terminal abucayi. Ndawonye, i-coating kanye ne-sealing inciphisa izehlakalo ze-wire-to-workpiece short-circuit cishe ngo-60% ezindaweni zokusebenzela ezishisayo, ngokocwaningo lwensimu lwango-2024. Hlanganisa lezi zinyathelo ohlelweni lokulungisa lokuvimbela lwaminyaka yonke ukuze kuhlale isikhathi eside imishini ye-wire EDM izinzile.

Imibuzo Evame Ukubuzwa

Kungani ukulawula kwezulu kubalulekile kubukhulu bokuthintana kwezinkambo zokusebenza kwe-EDM?

Ukulawula kwezulu kuvikela ukuthi amasiko asebenzisana nezinkambo zokusebenza kanye nezinkambo zokugcina izinto, ukuze kubhekwe ukuthi izinkambo ziyisilinganiso esifanayo kanye nokusebenza kwezinkambo zokugcina izinto, okubalulekile ukuthi izinkambo zokusebenza ziyisilinganiso.

Izinkinga zokuthintana zokuphepha kwezulu kanye nezinkambo zokugcina izinto ziziphi?

Indawo yokusebenza kufanele ibe yezinkambo zokuthintana phakathi kwe-20–25°C kanye nezinkambo zokugcina izinto ezinje nge-55% RH ukuze kuvikeke ukuthi kubekwe iziphetho ezingavumelekile kwenkambo yokusebenza kanye nokuvikela izinkambo zokusebenza.

Kungani ukuthi ukuthintana kwezinkambo zokugcina izinto kungahlela ukuthi inkambo yokusebenza iyisilinganiso?

Ukuthintana okuphansi kusuka kwezinkambo zokugcina izinto kungasiza ukuthi kubekwe ukuthintana okungafanele kanye nokusebenza okungasilinganisi. Ukuzwela ngokuphepha kanye nokuvikela ukuthi ukuthintana kuyisilinganiso kungenzeka ngaphezu kwe-2 MΩ·cm kubalulekile.

Izindlela ziphi ezingavikela ukuthi izinkambo zokusebenza zihlukunyeze kumaqondo okuphepha?

Ukuzwela ngokuphepha kwezinkambo zokusebenza ngeminyaka emibili, ukufaka isilayi sokuthintana kwe-PCB, kanye nokuvikela izindawo zokugxila kwezinkambo zokugcina izinto zingabasebenzi ebalulekile ukuvikela izinkambo zokusebenza kusuka kwezinkambo zokugcina izinto kanye ukuthintana okungafanele.

Kungani ukuthi ukuzwela ngokuphepha kwezinkambo zokugcina izinto kubalulekile?

Isinkamiso sesilika sokuqondisa isilika sokuphatha kungasindisi ukuthi ukuthintana kwezilika ziyakhula, kubhekise ukuthi ukusebenza kuyisitabile. Ukususa okuphakade kuyabhekisa ukuthi ukuthintana kungaphansi kwe-5 μS/cm.