Precautions for the operation of coreless foornada induction for conventional foundry

The following precautions are well-known to melters and foundries, and are common knowledge not only for coreless induction furnaces but also for all metal smelting operations. This is just for general knowledge and does not involve all types of operations. These matters should be explained clearly and appropriately expanded or perfected by a specific operator.

Hawlgallada dhalaalidda iyo shubista waa in ay ku koobnaadaan shaqaale haysta shahaado shahaado, ama shaqaale u qalma tababarka iyo qiimaynta warshadda, ama hawlgallada hoos yimaada talisyada injineernimada iyo farsamada ee warshadda.

Shaqaalaha goobta joogaa waa inay had iyo jeer xidhaan muraayadaha badbaadada oo leh fiimyo ilaalin ah, oo ay isticmaalaan filtarrada gaarka ah markay eegayaan biraha heerkulkiisu sarreeyo.

4. Shaqaalaha ka shaqeeya agagaarka dabka waa in ay xidhaan dharka ka ilaaliya kulaylka iyo kuwa dabka u adkaysta. Fiber kiimikaad ah (nylon, polyester, iwm.) dharka waa in aan la gashan agagaarka dabka.

5. Dahaarka foornada waa in si joogta ah loo fiiriyaa waqtiyo gaar ah si looga hortago “daal”. qaboojinta ka dib, hubi daboolka foornada. Marka dhumucda dahaarka foornada (marka laga reebo guddiga asbestos-ka) ay ka yar tahay 65mm-80mm xirashada ka dib, foornada waa in la hagaajiyaa.

6. Ku darista alaabta waa inay taxaddaraan si ay uga fogaadaan “buundooyinka” alaabta. Heerkulka aadka u sarreeya ee birta ee labada dhinac ee “buundooyinka” waxay sababi doontaa daxalka xuubka foornada si uu u dardargeliyo.

7. Foornada kicinta cusub ee aan cirridka lahayn waa in laga sameeyaa walxo ku habboon, oo ku habboon birta in la dhalaaliyo, oo gebi ahaanba la qalajiyo ka hor inta aan lagu darin alaabta dhalaalaysa. Xeerarka shaybaarka waa inay si adag u raacaan qodobkan.

8. Alaabta dhalaalaysa ee hooseeya sida aluminium iyo zinc waa in si taxadar leh loogu daro dareerayaasha heerkulka sare leh sida birta. Haddii waxyaabaha lagu daro barta dhalaalaysa ee hoose ay hoos dhalaaliso ka hor, si xoog leh ayay u karkari doonaan oo waxay keeni doonaan qulqul ama xataa qarax. Si gaar ah uga digtoonow markaad ku darto kharashka tuubada galvanized.

9. Kharashku waa inuu noqdaa mid qallalan, oo aan lahayn walxo guban kara, oo aan si xad dhaaf ah u daxalaysan ama qoyan. Karkari xoog leh ee dareeraha ama waxyaabaha gubanaya ee ku jira kharashka waxay keeni kartaa in birta dhalaalaysa ay buux dhaafto ama xitaa qarxo.

10. Quartz crucibles ee la dhaqaajin karo ayaa la isticmaali karaa marka labadaba birta iyo foornooyinka induction induction ay yihiin cabbir ku habboon. Looma qorsheynin dhalaalitaanka heerkulka sare ee biraha birta ah. Caddaynta wax-soo-saaruhu waa inuu ahaadaa hage loogu talagalay isticmaalka weelka.

11. Marka birta lagu soo raro weelka, dhinacyada iyo gunta gunta waa in lagu taageeraa garab. Taageeradu waa in ay isku daydo in ay ka ilaaliso in qoloftu ka siibanayso inta lagu jiro wax shubidda.

12. Waa in la fahmo aqoonta kimisteriga dhalaalaysa ee khuseeya. Tusaale ahaan, falcelinta kiimikaad sida karkarinta rabshadaha leh ee kaarboon waxay sababi kartaa waxyeelo qalabeed iyo dhaawac shaqsiyeed. Heerkulka kuleylka kuleylka waa inuusan dhaafin qiimaha loo baahan yahay: Haddii heerkulka birta dhalaalaysa ay aad u sarreeyso, nolosha foornada foornada ayaa si weyn loo dhimi doonaa, sababtoo ah falcelinta soo socota ayaa ku dhici doonta daboolka foornada acid: SiO2 + 2 (C) [Si] +2CO Falcelintani waxay gaartaa 1500 ℃ birta dhalaalaysa. Korku wuxuu u socday si degdeg ah, isla markaana ka koobnaanta birta dhalaalaysa ayaa sidoo kale isbeddelay, curiyaha kaarboonku waa gubtay, waxa ku jira silikoonku wuu kordhay.

13. Goobta wax lagu helayo waa inay ilaaliso mugga dareeraha ah. Taabashada birta kulul iyo dareeraha waxay keeni kartaa qarax rabshado wata waxayna sababi kartaa dhaawac shakhsi ah. Hadhaaga kale waxay ka hortagi karaan birta dhalaalaysa inay ku qulqulaan haanta buux dhaaftay ama waxay huri karaan dab.

14. Haanta xad dhaafka ahi waa inay diyaar u ahaato inay hesho birta dhalaalaysa wakhti kasta marka foornada induction ee aan xudunta lahayni shaqaynayso. Daadanayaa waxa laga yaabaa inay soo baxaan digniin la’aan. Isla mar ahaantaana, haddii foornada induction induction la faaruqiyo sida ugu dhaqsaha badan oo foosto (ladle) aysan ku habooneyn, foornada induction ee aan cidi lahayn ayaa si toos ah loogu shubi karaa haanta qulqulka.

15. Dhammaan shaqaalaha sida macmalka ah ugu tallaala xubnaha, kala-goysyada, taarikada ama wixii la mid ah waa in ay ka fogaadaan foornada kicinta ee aan asalka lahayn. Goobta birta ah ee u dhow aaladda waxay kicin kartaa hadda ku rakiban bir kasta. Dadka leh qalab-sameeyayaasha wadnaha ayaa si gaar ah halis ugu jira waana inay ka fogaadaan foornada kicinta ee aan asalka lahayn.