Zaɓar kaurin zoben ƙarfe da ya dace babban ƙalubale ne mai fannoni da dama. Yana buƙatar zurfafa nazari kan takamaiman buƙatun amfani da kuke da su, yanayin muhalli na halitta, sigogin kayan, da tattalin arziki. Don yin zaɓi da ya dace, dole ne ku fahimci muhimman abubuwa huɗu.
1. Muhimman Abubuwan Da Ke Tasiri Kan Zaɓinka
Ƙarfin ɗaukar nauyi da matsin tsari
Kauri shine muhimmin abin da ke tantance nawa nauyi tsari—kamar rufi ko akwati—zai iya ɗauka.
Nauyin Halitta: Dole ne ku yi la'akari da nauyin dusar ƙanƙara a yankunan arewa ($\ge 0.5\text{kN/m}^2$), nauyin iska a yankunan bakin teku ($\ge 1.0\text{kN/m}^2$), da zirga-zirgar ma'aikatan kula ($\ge 0.7\text{kN/m}^2$).
Tazarar Purlin: Tsawon tazara mafi nisa na buƙatar coils masu kauri don kiyaye ƙarfin lankwasa.
Don tazara $\le 1.5\text{m}$, kauri na 0.3–0.5 mm yawanci ya isa.
Don tazara $> 2.0\text{m}$, ya kamata ka zaɓi $\ge 0.6\text{mm}$ don hana lalacewa.
Tsatsa na Muhalli
Muhalli yana tsara tsira na kayan.
Yankunan bakin teku: Yankunan da guguwa mai ƙarfi da feshi na gishiri ke yawa suna buƙatar kaurin rufi na 0.6 mm ko sama da haka.
Yankunan Masana'antu: Muhallai masu hayaki mai lalata suna buƙatar kauri na 0.5–0.8 mm; ana fi son bakin ƙarfe 304 ko 316 don tsawon rai mafi girma.
Ƙarfin Jiki & Sarrafawa
Darajar Kayan: Kayan da ke da ƙarfi sosai suna ba da damar yin kauri mai siriri. Misali, saboda bakin ƙarfe 316 ya fi ƙarfi fiye da 201, za ka iya amfani da kauri na 0.35–0.5 mm ga 316 don samun irin ɗaukar nauyi ɗaya kamar yadda takardar 201 mai kauri na 0.5 mm ke bayarwa.
Yiwuwar sarrafawa: Kwayoyin siriri ($\le 0.5\text{mm}$) sun fi dacewa don lankwasawa da buga sassa masu daidaito. Kwayoyin kauri ($> 4\text{mm}$) sun fi wahalar sarrafawa kuma suna buƙatar kayan aiki na musamman masu nauyi.
| Bangaren Aikace-aikace | Kaurin da aka ba da shawara | Kayan Aiki/Bayanan da Aka Ba da Shawara |
|---|---|---|
| Rufin gidaje | 0.4–0.6mm | Karfe mara tsatsa 304 |
| Rufin Masana'antu | 0.5–0.8mm | 304 ko 316 bakin ƙarfe |
| Rufin bakin teku | 0.6–0.8mm | 316 Karfe mara tsatsa (mai juriya ga guguwa) |
| Bangon Ciki | 0.25–0.4mm | 201 ko 304 bakin ƙarfe |
| Bangon Waje | 0.35–0.6mm | Karfe mara tsatsa 304 |
| Jikin Motoci | 0.5–1.2mm | Zoben bakin ƙarfe da aka nannade a sanyi |
| Marufi (Kwalabe) | 0.008–0.018mm | An yi masa rufi da tin ko an shafe shi da tin |
| Gadarori da Jiragen Ruwa | 20mm ko sama da haka | Zoben ƙarfe masu ninka da aka ninka a zafi masu ƙarfi sosai |
3. Guje wa waɗannan kuskuren fahimta guda huɗu da ake yawan samu
Karyar 1: “Zama matuƙar siriri yana ajiye kuɗi.” Rage kuɗin farko ta hanyar zaɓar kayan da suka fi ƙarancin kauri fiye da abin da ake buƙata sau da yawa yana haifar da lanƙwashewar rufi, zubar ruwa, ko ma rushewa. Wani shafin gini ya yi amfani da kayan 0.3mm wanda ya rushe ƙarƙashin dusar ƙanƙara; farashin maye gurbinsa ya kai sau uku na farashin asali.
Karyar Magana ta 2: “Kauri Kullum Yafi Kyau.” Kauri ba komai ba ne; darajar kayan tana da muhimmanci. Rufin bakin teku da aka yi da bakin ƙarfe 201 na iya tsatsa ya lalace cikin watanni shida ko da kuwa yana da kauri. Yafi kyau a inganta kayan (misali zuwa 316) fiye da ƙara kauri kawai.
Karya ta 3: “Rashin la'akari da abubuwan girkawa.” Ko ma coil na 0.6mm Za su lankwasa idan tazara tsakanin purlin ɗinku ta wuce mita 2.5. A irin waɗannan lokuta, dole ne ku rage tazara ko ƙara kauri zuwa 0.7 mm.
Karyar 4: “Daukar cewa duk kaurin suna samuwa.” Kaurin da aka saba samu sune 0.3, 0.35, 0.4, 0.5, 0.6, da 0.8mm. Neman girman “na musamman” kamar 0.55mm ba tare da tuntuɓar mai kera ba na iya janyo manyan jinkiri a samarwa.
