Wurin zamewar crossbeam wani muhimmin sashi ne na kayan aikin injin, wanda ke da ƙayyadaddun tsari da nau'ikan iri daban-daban. Kowane mahaɗar wurin zama na faifan faifan beam yayi dace kai tsaye da wuraren haɗin giciye. Duk da haka, lokacin da ake canzawa daga zamewar duniya mai axis biyar zuwa faifan yankan-axis mai nauyi-biyar, canje-canje suna faruwa a lokaci guda a wurin zama na zamewar giciye, giciye, da tushen dogo mai jagora. A baya can, don biyan buƙatun kasuwa, manyan abubuwan da aka gyara dole ne a sake fasalin su, wanda ya haifar da tsawon lokacin jagora, tsadar tsada, da rashin musanyawa.
Don magance wannan batu, an ƙirƙira sabon tsarin wurin zama na faifai don kula da girman mu'amalar waje iri ɗaya kamar na duniya. Wannan yana ba da damar shigar da faifai mai nauyi mai nauyi mai axis guda biyar ba tare da buƙatar canje-canje ga giciye ba ko wasu manyan abubuwan haɗin ginin, yayin da kuma gamsar da buƙatu mai ƙarfi. Bugu da ƙari, haɓakawa a cikin fasahar sarrafawa sun haɓaka daidaiton masana'antar kujerun faifan faifai. Irin wannan ingantaccen tsari, tare da hanyoyin sarrafawa masu alaƙa, ana ba da shawarar don haɓakawa da aikace-aikace a cikin masana'antar.
1. Gabatarwa
Sanannen abu ne cewa girman wutar lantarki da juzu'i yana shafar sifar shigarwar sashin giciye na shugaban axis biyar. Wurin zama na zamewar katako, wanda aka sanye shi da faifan faifan axis biyar na duniya, ana iya haɗa shi da katako na zamani na duniya ta hanyar layin dogo. Koyaya, sashin giciye na shigarwa don babban iko da babban juzu'i mai nauyi mai nauyi-axis yankan faifai mai nauyi ya wuce 30% girma fiye da na nunin faifai na duniya na al'ada.
A sakamakon haka, ana buƙatar haɓakawa a cikin ƙirar wurin zama na nunin katako. Mabuɗin ƙirƙira a cikin wannan sake fasalin shine ikon raba katako iri ɗaya tare da wurin zama na faifan katako na faifan axis biyar na duniya. Wannan hanya tana sauƙaƙe gina dandamali na zamani. Bugu da ƙari, yana haɓaka tsayin daka gabaɗaya zuwa wani ɗan lokaci, yana gajarta zagayowar samarwa, yana rage farashin masana'antu sosai, kuma yana ba da damar daidaitawa ga canje-canjen kasuwa.
Gabatarwa ga tsari na al'ada tsari-nau'in katako nunin kujera
Tsarin axis biyar na al'ada da farko ya ƙunshi manyan abubuwa kamar wurin aiki, wurin zama na jagora, katako, wurin zama na zamewar katako, da zamewar axis biyar. Wannan tattaunawar tana mai da hankali kan ainihin tsarin wurin zama na zamewar katako, kamar yadda aka kwatanta a Hoto na 1. Saitunan kujerun faifan katako guda biyu suna da ma'ana kuma sun ƙunshi faranti na sama, na tsakiya da na ƙasa, waɗanda suka kai jimillar abubuwa takwas. Waɗannan kujerun faifan katako mai ma'ana suna fuskantar juna kuma suna manne faranti na tallafi tare, wanda ya haifar da wurin zama na zamewar katako mai siffar “baki” tare da tsarin runguma (koma zuwa kallon sama a hoto na 1). Girman da aka nuna a cikin babban ra'ayi suna wakiltar jagorancin tafiya na katako, yayin da ma'auni a cikin ra'ayi na hagu suna da mahimmanci don haɗi zuwa katako kuma dole ne su bi ƙayyadaddun haƙuri.
Daga mahangar wurin zama na zamewar katako, don sauƙaƙe sarrafawa, ƙungiyoyi na sama da na ƙasa shida na saman haɗin faifai a mahadar sifar “I”—wanda ke da faffadan saman sama da kunkuntar tsakiya—an mayar da hankali kan saman sarrafawa ɗaya. Wannan tsari yana tabbatar da cewa ana iya samun daidaiton girma dabam dabam da na geometric ta hanyar aiki mai kyau. Ƙungiyoyin sama, na tsakiya, da ƙananan faranti na tallafi suna aiki ne kawai a matsayin tallafi na tsari, yana mai da su sauƙi da aiki. Matsakaicin sassan giciye na nunin axis biyar, wanda aka tsara tare da tsarin rufaffiyar al'ada, a halin yanzu 420 mm × 420 mm. Bugu da ƙari, kurakurai na iya tasowa yayin aiki da haɗuwa na faifan axis biyar. Don ɗaukar gyare-gyare na ƙarshe, manyan faranti na sama, na tsakiya, da na ƙasa dole ne su kula da giɓi a cikin rufaffiyar wuri, waɗanda daga baya aka cika su da gyare-gyaren allura don ƙirƙirar ƙaƙƙarfan tsarin rufaffiyar madauki. Waɗannan gyare-gyare na iya gabatar da kurakurai, musamman a cikin wurin zama na nunin faifai, kamar yadda aka kwatanta a cikin Hoto 1. Ƙimar guda biyu na musamman na 1050 mm da 750 mm suna da mahimmanci don haɗawa tare da giciye.
Dangane da ka'idodin ƙira na yau da kullun, waɗannan ma'auni ba za a iya canza su ba don kiyaye dacewa, wanda a kaikaice ya hana haɓakawa da daidaitawa na wurin zama na zamewar giciye. Yayin da wannan saitin zai iya biyan buƙatun abokin ciniki a wasu kasuwanni na ɗan lokaci, baya daidaitawa da buƙatun kasuwa masu tasowa cikin sauri a yau.
Fa'idodin ingantaccen tsari da fasahar sarrafawa
3.1 Gabatarwa zuwa Ƙirƙirar Tsarin
Haɓaka aikace-aikacen kasuwa ya ba wa mutane zurfin fahimtar sarrafa sararin samaniya. Bukatar karuwar buƙatu don babban juzu'i da ƙarfi mai ƙarfi a cikin takamaiman sassan sarrafawa ya haifar da sabon salo a cikin masana'antar. Dangane da wannan buƙatar, an ɓullo da sabon wurin zama na faifan igiya wanda aka ƙera don amfani tare da kai mai axis guda biyar kuma yana nuna babban ɓangaren giciye. Babban makasudin wannan ƙira shine don magance ƙalubalen da ke tattare da matakan yanke nauyi masu buƙatar ƙarfi da ƙarfi.
An kwatanta sabon tsarin sabon wurin zama na nunin faifai a cikin Hoto 2. Yana rarraba makamancin haka zuwa nunin faifai na duniya kuma ya ƙunshi nau'ikan kujeru na faifan faifan madaidaici guda biyu, tare da saiti biyu na manyan faranti na sama, na tsakiya da na ƙasa, duk suna samar da faranti. m nau'in rungumar tsari.
Maɓalli mai mahimmanci tsakanin sabon ƙira da ƙirar al'ada ya ta'allaka ne a cikin madaidaicin wurin zama na faifan giciye da faranti na tallafi, waɗanda aka juya ta 90 ° idan aka kwatanta da ƙirar al'ada. A cikin kujerun nunin faifai na giciye na al'ada, faranti na tallafi galibi suna aiki da aikin tallafi. Koyaya, sabon tsarin yana haɗa filayen shigarwa na faifai akan duka manyan faranti na sama da na ƙasa na wurin zama na faifan faifai, ƙirƙirar tsarin tsaga ba kamar na ƙirar al'ada ba. Wannan ƙira tana ba da damar daidaitawa da daidaita saman saman haɗin faifai na sama da ƙasa don tabbatar da cewa sun kasance coplanar tare da saman haɗin faifai akan wurin zama na faifai na crossbeam.
Babban tsarin yanzu yana kunshe da saiti guda biyu na kujerun faifan madaidaicin giciye, tare da faranti na sama, na tsakiya, da na ƙasa waɗanda aka tsara a cikin sifar “T”, wanda ke nuna sama mai faɗi da kunkuntar ƙasa. Girman 1160mm da 1200mm a gefen hagu na Hoto 2 yana karawa a cikin hanyar tafiye-tafiye na crossbeam, yayin da maɓalli na maɓalli na 1050mm da 750mm sun kasance daidai da na al'ada na wurin zama na giciye.
Wannan ƙira tana ba da damar sabon wurin zama na faifan faifai don raba gaba ɗaya buɗaɗɗen giciye kamar sigar al'ada. Tsarin haƙƙin haƙƙin da aka yi amfani da shi don wannan sabon wurin zama na nunin faifai ya haɗa da cikawa da taurare rata tsakanin farantin goyan baya da wurin zama na faifai ta hanyar yin amfani da gyare-gyaren allura, don haka ƙirƙirar tsarin runguma wanda zai iya ɗaukar 600mm x 600mm axis mai nauyi-biyar yankan zamewa. .
Kamar yadda aka nuna a gefen hagu na Hoto 2, babban haɗin faifai na sama da na ƙasa akan wurin zama na faifan faifan beam wanda ke tabbatar da faifan yankan mai nauyi mai axis biyar yana haifar da tsaga tsarin. Saboda yuwuwar kurakuran sarrafawa, shimfidar faifan faifai da sauran juzu'i da daidaiton geometric ƙila ba za su kwanta akan jirgin sama ɗaya na kwance ba, yana dagula aiki. Dangane da wannan, an aiwatar da ingantaccen tsari don tabbatar da ingantacciyar haɗuwa don wannan tsagawar tsarin.
3.2 Bayanin Tsarin Nika na Coplanar
Ƙarshen ƙarshen kujerar faifan katako guda ɗaya ana kammala shi da ingantacciyar injin niƙa, yana barin izinin ƙarewa kawai. Yana buƙatar yin bayani a nan, kuma kawai ƙaddamar da niƙa ya bayyana dalla-dalla. An bayyana takamaiman tsarin niƙa kamar haka.
1) Kujerun faifan katako guda biyu masu ma'ana suna ƙarƙashin niƙa guda ɗaya. An kwatanta kayan aikin a cikin Hoto na 3. Ƙarshen ƙarewa, wanda ake magana da ita a matsayin saman A, yana aiki a matsayin wuri mai matsayi kuma an manne shi a kan injin niƙa mai jagora. Alamar da ke ɗauke da ma'anar B da yanayin tsarin tsarin C suna ƙasa don tabbatar da cewa girman girman su da daidaiton lissafi sun cika buƙatun da aka kayyade a cikin zane.
2) Don magance ƙalubalen sarrafa kuskuren da ba na coplanar ba a cikin tsarin da aka ambata a sama, mun tsara ƙayyadaddun ƙayyadaddun tallafi guda huɗu na kayan aikin toshe daidai-tsayi da tallafi na ƙasa guda biyu daidai-tsawo toshe kayan aikin. Darajar 300 mm yana da mahimmanci don ma'aunin tsayi daidai kuma dole ne a sarrafa shi bisa ga ƙayyadaddun da aka bayar a cikin zane don tabbatar da tsayi iri ɗaya. An kwatanta wannan a hoto na 4.
3) Saiti biyu na kujerun faifan katako mai ma'ana suna manne tare fuska da fuska ta amfani da kayan aiki na musamman (duba Hoto 5). Saituna huɗu na ƙayyadaddun tubalan tallafi na tsayi daidai suna haɗa su zuwa kujerun faifan katako ta cikin ramukan hawansu. Bugu da ƙari, nau'i biyu na tubalan tallafi na ƙasa na daidai tsayi suna daidaitawa kuma an daidaita su tare da haɗin kai mai ɗaukar hoto B da tsarin tunani C. Wannan saitin yana tabbatar da cewa duka saitin kujerun faifan katako na simmetrical an sanya su a daidai tsayi daidai dangane da madaidaicin katako. mai ɗauke da saman B, yayin da ake amfani da tsarin tunani surface C don tabbatar da cewa kujerun faifan katako sun daidaita daidai.
Bayan an gama sarrafa coplanar, saman haɗin faifan faifai na kujerun faifan katako guda biyu za su zama coplanar. Wannan aiki yana faruwa ne a cikin wucewa ɗaya don tabbatar da daidaiton girmansu da daidaiton geometric.
Bayan haka, ana jujjuya taron zuwa matsewa da sanya saman da aka sarrafa a baya, yana ba da damar niƙa sauran saman haɗin faifai. A yayin aikin niƙa, gabaɗayan wurin zama na zamewar katako, wanda aka amintar da kayan aikin, yana ƙasa a cikin wucewa ɗaya. Wannan hanya tana tabbatar da cewa kowane saman haɗin faifai ya cimma halayen coplanar da ake so.
Kwatanta da tabbatar da bayanan bincike mai tsauri na kujerar faifan katako
4.1 Rukunin aikin niƙa jirgin sama
A cikin yankan karfe, daCNC milling lathekarfi a lokacin da jirgin nika za a iya raba uku tangential sassa da aiki a kan kayan aiki. Waɗannan rundunonin ɓangarori sune alamomi masu mahimmanci don tantance ƙaƙƙarfan ƙaƙƙarfan kayan aikin inji. Wannan tabbaci na ƙa'idar bayanai ya yi daidai da ƙa'idodin ƙa'idodin gwaje-gwajen taurin kai. Don nazarin sojojin da ke aiki akan kayan aikin injin, muna amfani da hanyar bincike mai iyaka, wanda ke ba mu damar canza gwaje-gwaje masu amfani zuwa kima. Ana amfani da wannan hanyar don tantance ko ƙirar wurin zama na nunin katako ya dace.
4.2 Jerin sigogin yankan jirgin sama masu nauyi
Diamita mai yanka (d): 50 mm
Yawan hakora (z): 4
Saurin juyi (n): 1000 rpm
Gudun ciyarwa (vc): 1500 mm/min
Nisa niƙa (ae): 50 mm
Zurfin yankan baya (ap): 5 mm
Ciyar da kowane juyin juya hali (ar): 1.5 mm
Ciyar da haƙori (na): 0.38 mm
Ana iya ƙididdige ƙarfin milling na tangential (fz) ta amfani da dabara:
\[ fz = 9.81 \times 825 \ times ap^{1.0} \times af^{0.75} \times ae^{1.1} \times d^{-1.3} \lokacin n^{-0.2} \lokacin z^{ 60^{-0.2}}
Wannan yana haifar da ƙarfi na \( fz = 3963.15 \, N \).
Idan aka yi la'akari da abubuwan niƙa mai ma'ana da asymmetrical yayin aikin injin, muna da ƙarfi masu zuwa:
- FPC (ƙarfi a cikin hanyar X-axis): (fpc = 0.9 \ lokuta fz = 3566.84 \, N \)
- FCF (ƙarfi a cikin hanyar Z-axis): (fcf = 0.8 \ lokuta fz = 3170.52 \, N \)
- FP (ƙarfi a cikin hanyar Y-axis): (fp = 0.9 \ lokuta fz = 3566.84 \, N \)
Inda:
- FPC shine karfi a cikin hanyar X-axis
- FCF shine karfi a cikin hanyar Z-axis
- FP shine karfi a cikin hanyar Y-axis
4.3 Ƙayyadadden bincike a tsaye
Zane-zanen zane-zane guda biyu na yankan axis guda biyar suna buƙatar gini na yau da kullun kuma dole ne su raba katako iri ɗaya tare da buɗe ido mai dacewa. Saboda haka, rigidity na wurin zama nunin katako yana da mahimmanci. Muddin wurin zama na faifan katako ba zai fuskanci ƙaura mai yawa ba, ana iya ɗauka cewa katakon na duniya ne. Don tabbatar da ƙaƙƙarfan buƙatun, za a tattara bayanan da suka dace don aiwatar da ƙayyadaddun binciken kwatancen ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun kujerun faifan katako.
Wannan bincike lokaci guda zai gudanar da iyakataccen bincike a tsaye akan duka majalisun kujerun faifan katako. Wannan daftarin aiki yana mai da hankali musamman kan cikakken bincike na sabon tsarin wurin zama na zamewar katako, yana barin ƙayyadaddun ainihin binciken wurin zama na zamiya. Yana da mahimmanci a lura cewa yayin da na'ura mai nauyin biyar na duniya ba zai iya ɗaukar nauyin yankan nauyi ba, ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ɓangarorin "S" ana gudanar da su sau da yawa yayin gwaje-gwajen karɓa. Ƙarfin yankan da ƙarfi a cikin waɗannan lokuta na iya zama daidai da waɗanda ke cikin yankan nauyi.
Dangane da shekarun gogewar aikace-aikacen da ainihin yanayin isarwa, imanin marubucin ne cewa sauran manyan abubuwan da ke cikin injin axis biyar na duniya sun cika cikakkun buƙatun don juriya mai nauyi. Don haka, gudanar da bincike na kwatankwacin ma'ana ne kuma na yau da kullun. Da farko, kowane sashi yana sauƙaƙe ta hanyar cirewa ko damfara ramukan zaren, radis, chamfers, da ƙananan matakai waɗanda zasu iya shafar rabon raga. Sannan ana ƙara abubuwan da suka dace na kowane sashi, kuma ana shigo da samfurin a cikin simintin don bincike na tsaye.
A cikin saitunan sigina don bincike, mahimman bayanai kawai kamar taro da hannu na ƙarfi ana kiyaye su. Wurin zama na faifan katako yana haɗawa a cikin binciken nakasar, yayin da sauran sassa kamar kayan aiki, shugaban mashin ɗin axis biyar, da zamewar axis biyar mai nauyi ana ɗaukar tsattsauran ra'ayi. Binciken yana mai da hankali kan ƙaurawar dangi na wurin zama na zamewar katako a ƙarƙashin sojojin waje. Load ɗin waje ya haɗa da nauyi, kuma ana amfani da ƙarfi mai girma uku akan tip ɗin kayan aiki lokaci guda. Dole ne a bayyana ma'anar kayan aiki a gaba azaman ƙarfin ɗorawa mai ƙarfi don maimaita tsawon kayan aiki yayin aikin, yayin da tabbatar da cewa an sanya faifan a ƙarshen mashin ɗin don matsakaicin matsakaicin ƙarfi, yana kwaikwayi ainihin yanayin injin.
Thebangaren aluminums suna haɗe-haɗe ta amfani da hanyar "hanyar sadarwa ta duniya (-joint-)", kuma an kafa yanayin iyaka ta hanyar rarraba layi. An kwatanta yankin haɗin katako a cikin Hoto na 7, tare da rarraba grid da aka nuna a cikin Hoto 8. Matsakaicin girman naúrar shine 50 mm, mafi ƙarancin girman naúrar shine 10 mm, wanda ya haifar da jimlar 185,485 raka'a da 367,989 nodes. An gabatar da jimillar zanen gajimare na ƙaura a cikin Hoto na 9, yayin da sauye-sauyen axial guda uku a cikin kwatance X, Y, da Z ana nuna su a cikin Figures 10 zuwa 12, bi da bi.
Zane-zanen zane-zane guda biyu na yankan axis guda biyar suna buƙatar gini na yau da kullun kuma dole ne su raba katako iri ɗaya tare da buɗe ido mai dacewa. Saboda haka, rigidity na wurin zama nunin katako yana da mahimmanci. Muddin wurin zama na faifan katako ba zai fuskanci ƙaura mai yawa ba, ana iya ɗauka cewa katakon na duniya ne. Don tabbatar da ƙaƙƙarfan buƙatun, za a tattara bayanan da suka dace don aiwatar da ƙayyadaddun binciken kwatancen ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun kujerun faifan katako.
Wannan bincike lokaci guda zai gudanar da iyakataccen bincike a tsaye akan duka majalisun kujerun faifan katako. Wannan daftarin aiki yana mai da hankali musamman kan cikakken bincike na sabon tsarin wurin zama na zamewar katako, yana barin ƙayyadaddun ainihin binciken wurin zama na zamiya. Yana da mahimmanci a lura cewa yayin da na'ura mai nauyin biyar na duniya ba zai iya ɗaukar nauyin yankan nauyi ba, ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ɓangarorin "S" ana gudanar da su sau da yawa yayin gwaje-gwajen karɓa. Ƙarfin yankan da ƙarfi a cikin waɗannan lokuta na iya zama daidai da waɗanda ke cikin yankan nauyi.
Dangane da shekarun gogewar aikace-aikacen da ainihin yanayin isarwa, imanin marubucin ne cewa sauran manyan abubuwan da ke cikin injin axis biyar na duniya sun cika cikakkun buƙatun don juriya mai nauyi. Don haka, gudanar da bincike na kwatankwacin ma'ana ne kuma na yau da kullun. Da farko, kowane sashi yana sauƙaƙe ta hanyar cirewa ko damfara ramukan zaren, radis, chamfers, da ƙananan matakai waɗanda zasu iya shafar rabon raga. Sannan ana ƙara abubuwan da suka dace na kowane sashi, kuma ana shigo da samfurin a cikin simintin don bincike na tsaye.
A cikin saitunan sigina don bincike, mahimman bayanai kawai kamar taro da hannu na ƙarfi ana kiyaye su. Wurin zama na faifan katako yana haɗawa a cikin binciken nakasar, yayin da sauran sassa kamar kayan aiki, shugaban mashin ɗin axis biyar, da zamewar axis biyar mai nauyi ana ɗaukar tsattsauran ra'ayi. Binciken yana mai da hankali kan ƙaurawar dangi na wurin zama na zamewar katako a ƙarƙashin sojojin waje. Load ɗin waje ya haɗa da nauyi, kuma ana amfani da ƙarfi mai girma uku akan tip ɗin kayan aiki lokaci guda. Dole ne a bayyana ma'anar kayan aiki a gaba azaman ƙarfin ɗorawa mai ƙarfi don maimaita tsawon kayan aiki yayin aikin, yayin da tabbatar da cewa an sanya faifan a ƙarshen mashin ɗin don matsakaicin matsakaicin ƙarfi, yana kwaikwayi ainihin yanayin injin.
Thedaidai juya aka gyaraana haɗe-haɗe ta amfani da hanyar “hanyar sadarwa ta duniya (-joint-)”, kuma an kafa yanayin iyaka ta hanyar rarraba layi. An kwatanta yankin haɗin katako a cikin Hoto na 7, tare da rarraba grid da aka nuna a cikin Hoto 8. Matsakaicin girman naúrar shine 50 mm, mafi ƙarancin girman naúrar shine 10 mm, wanda ya haifar da jimlar 185,485 raka'a da 367,989 nodes. An gabatar da jimillar zanen gajimare na ƙaura a cikin Hoto na 9, yayin da sauye-sauyen axial guda uku a cikin kwatance X, Y, da Z ana nuna su a cikin Figures 10 zuwa 12, bi da bi.
Bayan nazarin bayanan, an taƙaita ginshiƙi na girgije kuma an kwatanta shi a cikin Table 1. Duk ƙimar suna cikin 0.01 mm na juna. Bisa ga wannan bayanan da kuma kwarewa na baya, mun yi imanin cewa giciye ba zai fuskanci ɓata lokaci ko lalacewa ba, yana ba da damar yin amfani da ma'auni mai mahimmanci a cikin samarwa. Bayan bita na fasaha, an yarda da wannan tsarin don samarwa kuma an sami nasarar cin nasarar yanke gwajin karfe. Duk ingantattun gwaje-gwaje na ɓangarorin gwajin “S” sun cika ka'idojin da ake buƙata.
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Maƙerin China na China High Precision dadaidai CNC machining sassa, Anebon yana neman damar saduwa da dukkan abokai na gida da waje don samun haɗin gwiwa tare da nasara. Anebon da gaske yana fatan samun hadin kai na dogon lokaci tare da dukkan ku bisa tushen samun moriyar juna da ci gaba tare.
Lokacin aikawa: Nuwamba-06-2024