Tattaunawar rata ta mutu da ƙwarewar kulawa

2021/08/22

I. Bayani da aka gani daga halin da ake ciki
Scrap shine ainihin hoton sabanin ramin da aka kafa. Wato, sashi ɗaya a sabanin matsayi. Ta hanyar bincika ɓarna, zaku iya tantance idan babba da ƙananan mutuwar daidai ne. Idan gibin ya yi yawa, abin da ya fashe zai kasance yana da kakkarfa, mai katsewa mai rauni da ƙaramin yanki mai haske. Girman rata mafi girma, mafi girman kusurwa tsakanin fartsatsewar farfajiya da yankin band mai haske. Idan gibin ya yi ƙanƙanta ƙwarai, ɓarna ɗin zai nuna ƙaramin karayar kusurwar kusurwa da faɗin band mai haske.


Girman da ya yi yawa yana haifar da rami tare da babban birgima da hawaye, yana barin ƙaramin bakin ciki yana fitowa kaɗan daga bayanin martaba. Ƙaramin tazara yana haifar da rami tare da ɗan ƙaramin ɓarna da babban hawaye mai kusurwa, wanda ke haifar da bayanin martaba wanda ya fi ƙasa da ƙasa daidai da saman kayan.

Kyakkyawan ɓarna yakamata ya sami kusurwar faduwa mai dacewa da madaidaicin haske mai haske. Wannan yana rage matsin lamba zuwa mafi ƙanƙanta kuma yana haifar da rami mai zagaye mai kyau tare da ƙanƙara kaɗan. Daga wannan ra'ayi,mika mutu'arayuwa ta hanyar ƙara tazara yana kan ƙimar ingancin ramin da aka gama.

II. Zaɓin izinin mutuwa
Yarda da mutuƙar yana da alaƙa da nau'in da kaurin kayan da za a hatimce. Rashin yarda mara kyau na iya haifar da matsaloli masu zuwa:
(1) Idan izinin ya yi yawa, ƙyallen kayan aikin da aka buga zai yi girma kuma ingancin bugun zai zama mara kyau. Idan yarda ya yi ƙanƙanta, ingancin ramin da aka buga ya fi kyau, amma suturar mutuƙar ta fi tsanani, wanda ke rage rayuwar sabis na mutuƙar, kuma yana da sauƙin haifar da karyewar bugun.
(2) Tazarar da ta yi yawa ko ta yi ƙanƙanta tana haifar da mannewa a kan abin naushi, ta haka ne ke haifar da tsiri a lokacin naushi. Ƙaramin gibi yana haifar da ɓarna tsakanin ƙasan saman bugun da farantin abu da fashewar fashewa.
(3) Kyakkyawan izini na iya tsawaita rayuwar mutu'a, sauke kayan da kyau, rage burrs da flanges, kiyaye farantin tsabta da daidaituwa ba tare da tanka farantin ba, rage adadin kaifi, ajiye farantin madaidaiciya da sanya naushi daidai .

Da fatan za a koma zuwa teburin da ke ƙasa don zaɓar izinin mutuwa (bayanan da ke cikin tebur kashi ɗari ne)
Zaɓin yarda (jimlar yarda)
Material Min Mafi Max
Tagulla 8% 12% 16%
Tagulla 6% 11% 16%
Low carbon karfe 10% 15% 20%
Aluminum (mai taushi) 5% 10% 15%
Bakin karfe 15% 20% 25%
% × kauri daga cikin kayan = tsabtace mold

Na uku, yadda za a inganta rayuwar sabis na mutu
Ga masu amfani, haɓaka rayuwar sabis na mutuƙar na iya rage farashin tambarin. Abubuwan da ke shafar rayuwar sabis na mutu kamar haka.
1. nau'in da kauri na kayan.
2. ko za a zabi ragin mutuƙar ƙima.
3. siffar tsarin mutuwa.
4. ko kayan suna da kyau lubricated lokacin stamping.
5. ko an yi wa mamacin magani na musamman na farfajiya.
6. irin su titanium plating, titanium carbide nitride.
7. jeri na turret na sama da na kasa.
8. amfani mai dacewa na daidaita shims
9, ko amfani da ya dace da gefen beveled mutu.
10, ko an sanya kayan aikin injin mutu mutu.

Na huɗu, bugun ramuka masu girman gaske ya kamata su kula da matsalar
(1) Da fatan za a yi amfani da naushi na musamman don ramukan ramuka a cikin kewayon Ï † 0.8-Ï † 1.6 don ƙaramin diamita rami.

(2) Lokacin bugun ramuka a cikin faranti masu kauri, da fatan za a yi amfani da babban mutuƙar dangane da diamita ramin sarrafawa.
Lura: A wannan yanayin, idan kun yi amfani da mutuƙar girman al'ada, zaren karkuwan za su karye.
Misali 1: Don yanayin sarrafawa a teburin da ke ƙasa, yi amfani da mutuƙar tashar B, kodayake diamita ramin sarrafawa yayi daidai da mutuwar A-tashar.
Kauri farantin kauri (mm) Ramin ramin (mm)
Karfe mai laushi (40Kg/mm2) 6.0 8.2-12.7
4.5 11.0-12.7
Bakin karfe (60Kg/mm2) 4.0 8.2-12.7

Misali 2: Don yanayin sarrafawa a cikin tebur mai zuwa, da fatan za a yi amfani da tashar C-mutu kodayake diamita ramin sarrafawa ya yi daidai da mutuƙar tashar B.
Kauri farantin kauri (mm) Ramin ramin (mm)
Karfe mai laushi (40Kg/mm2) 6.0 22.9-31.7
4.5 30.6-31.7
Bakin karfe (60Kg/mm2) 4.0 22.9-31.7

(3) Mafi ƙarancin nisa zuwa rabo tsawon bai kamata ya zama ƙasa da 1:10 ba don ɓangaren yanke na naushi.
Misali na 3: Don naushi mai kusurwa huɗu mai tsawon 80mm, faɗin gefen ya zama â ‰ ¥ 8mm.

(4) Dangantakar da ke tsakanin ƙaramin girman gefen bugun da kaurin farantin. Ana ba da shawarar cewa mafi ƙarancin girman gefen bugun ya zama sau 2 kaurin farantin.

V. Kaifin mutuwa
1ã € Muhimmancin mutuƙar kaifi
Kaifin mutuwa na yau da kullun shine tabbacin daidaiton inganci. Kaifi na yau da kullun ba kawai zai iya inganta rayuwar sabis na mutu ba har ma yana iya inganta rayuwar sabis na injin, don haka ya zama dole a ƙware lokacin kaifi daidai.

2ã € takamaiman halayen mutuƙar da ke buƙatar kaifi
Don kaifi mai mutuwa, babu adadi mai yawa na busawa don sanin ko ana buƙatar kaifi. Yawanci ya dogara ne da kaifi na yanke abin. An ƙaddara shi ta waɗannan abubuwa uku masu zuwa.
(1) Duba zagaye na gefen. Idan radius na zagaye ya kai R0.1 mm (matsakaicin darajar R dole ne ya wuce 0.25 mm) to ana buƙatar kaifi.
(2) Duba ingancin bugun, akwai babban burr da aka samar?
(3) Yi hukunci ko ana buƙatar kaifi ta hayaniyar injin naushi. Idan hayaniyar ba ta sabawa ba lokacin da aka buga wannan mutuƙar, yana nufin bugun ya dushe kuma yana buƙatar kaifi.
Lura: Idan gefen gefen yana zagaye ko ɓangaren ƙarshen gefen yana da kauri, ya kamata a yi la'akari da kaifi.

3ã € Hanyar kaifi.
Akwai hanyoyi daban -daban don kaifi mai mutuƙar mutuƙar mutuwa, wanda za a iya ganewa ta injin keɓewa na musamman ko a kan injin niƙa. Yawan kaifi don naushi da ƙananan mutuwa gabaɗaya shine 4: 1, da fatan za a daidaita tsayin mutuwar bayan kaifi.
(1) Haɗarin hanyoyin kaifi ba daidai ba
Kaifin da ba daidai ba zai kara ruguza saurin lalata gefen mutuwa, wanda ke haifar da raguwar yawan busawa ta kowane kaifi.
(2) Amfanin madaidaicin hanyar kaifi
Ta hanyar daidaita mutuƙar a kai a kai, ana iya kiyaye inganci da daidaiton bugun. Gefen mutuƙar zai lalace da sannu a hankali kuma zai sami tsawon rai.

4. Sharpening sharudda.
Yakamata a yi la’akari da abubuwan da ke gaba yayin kaifi mutuƙar.
(1) Gangar zagaye na gefe a cikin girman girman R0.1-0.25 mm don ganin kaifin gefen.
(2) Ya kamata a tsabtace farfajiyar motar niƙa.
(3) An ba da shawarar yin amfani da ƙaƙƙarfan ƙaƙƙarfan hatsi, mai taushi. Kamar WA46KV
(4) Ƙarar niƙa (ƙimar cin kayan aiki) kada ta wuce 0.013 mm kowane lokaci. Yawan ƙarar da yawa zai haifar da zafi fiye da kima na farfajiyar, wanda yayi daidai da jiyya ta huɗu, taushi mai ƙyalli da rage rayuwar ƙirar sosai.
(5) Dole ne a ƙara isasshen mai sanyaya ruwa yayin kaifi.
(6) Lokacin niƙa, tabbatar da cewa an gyara naushi da ƙananan mutuƙar kuma an yi amfani da kayan aiki na musamman.
(7) Yawan kaifi na mutuƙar ya tabbata, idan an kai ƙimar, yakamata a soke naushi. Idan kuka ci gaba da amfani da shi, cikin sauƙi zai haifar da lalacewar mutuƙar da injin, wanda bai cancanci asarar ba.
(8) Bayan kaifi, yakamata a kula da gefen tare da dutsen mai don cire gefuna masu kaifi.
(9) Bayan kaifafa, tsaftace shi, rage girman sa da mai.
Lura: Girman kaifin mutuƙar ya dogara da kaurin takardar da za a hatimce.

VI. Yi hankali kafin amfani da naushi
1. Adana
(1) Shafa babba mutu tsabtace ciki da waje da kyalle mai tsabta.
(2) Yi hattara kada a sami tabo ko hakora a farfajiya lokacin adanawa.
(3) Mai da shi don hana tsatsa.

2ã € Shirya kafin amfani
(1) Tsaftace saitin matattarar sama sosai kafin amfani.
(2) Bincika idan akwai raɗaɗi da raɗaɗi akan farfajiya. Idan akwai, yi amfani da dutsen mai don cirewa.
(3) Mai a ciki da waje.

3ã € Lura lokacin da ake saka naushi a saitin mutuƙar babba
(1) Tsaftace naushi da mai da dogon hannunta.
(2) Saka naushi a cikin gindin babban hannun riga na mutu akan babban tashar mutu ba tare da ƙarfi ba. Ba za a iya amfani da guduma nailon ba. Lokacin shigarwa, ba za a iya gyara bugun ta hanyar ƙarfafa ƙwanƙwasa a kan saitin mutuƙar babba ba, kuma za a iya ƙulle ƙulli ne kawai bayan an saita madaidaicin daidai.

4ã € Shigar da babba mutu cikin turret
Idan kuna son tsawaita rayuwar mutu'a, rabe -raben da ke tsakanin diamita na saman saitin mutuƙar da ramin turret yakamata ya zama ƙarami. Don haka don Allah a aiwatar da waɗannan hanyoyin a hankali.
(1) Tsaftace da mai da maɓallin maɓalli da diamita na ciki na ramin turret.
(2) Daidaita hanyar mabuɗin jagorar mutuƙar bushes don dacewa da maɓallin ramin turret.
(3) Saka jagorar mutuƙar babba kai tsaye cikin ramin turret, tare da yin taka tsantsan kada a karkata. Jagorar mutuƙar babba yakamata ya zame cikin ramin turret da nauyin kansa.
(4) Idan an karkatar da jagoran babba zuwa gefe ɗaya, taɓa shi a hankali tare da kayan aiki mai laushi kamar guduma nailan. Maimaita har sai jagoran babba ya zame cikin madaidaicin matsayi ta nauyin kansa.
Lura: Kada a yi amfani da ƙarfi a kan diamita na waje na jagorar mutuƙar babba, kawai a saman bugun. Ba za a iya buga saman saitin mutuƙar babba ba, don kada ya lalata ramin turret, rage rayuwar sabis na tashoshin mutum ɗaya.

Bakwai, kula da mutuwar
Idan kayan ya ciji naushi kuma ba za a iya fitar da shi ba, da fatan za a bincika gwargwadon abubuwan da ke gaba.
1. Sake kaifi naushi da ƙananan mutuwa. Kaifi mai kaifi na mutuƙar zai iya aiwatar da kyakkyawan yanki mai yankewa, kuma gefen mara kyau yana buƙatar ƙarin matsin lamba, kuma ƙazantar sashin aikin yana haifar da babban juriya, yana sa kayan ya cije naushi.
2, yarda da mutuwa. Idan ba a zaɓi izinin mutuƙar da kyau ba dangane da kaurin farantin, naushi yana buƙatar babban ƙarfin sakin lokacin da aka ware shi daga kayan. Idan wannan shine dalilin da kayan ya ciji naushi, don Allah maye gurbin ƙaramin mutuwa tare da yarda mai dacewa.
3. Yanayin kayan da aka sarrafa. Lokacin da kayan suka ƙazantu, ko akwai datti, ƙazantar tana manne wa mutuƙar, ta sa ba zai yiwu a sarrafa ta ba saboda abin ya ciji naushi.
4ã € Abu tare da shafi. Kayan da aka murƙushe zai dunƙule naushi bayan naushi kuma ya ciji naushi. Idan kayan sun lalace, da fatan za a mai da shi sannan a sarrafa shi.
5ã € Yawan amfani da bazara. Zai sa gajiya ta bazara. Da fatan za a duba aikin bazara lokaci zuwa lokaci.

NA BIYU. Mai
Adadin mai da yawan lokutan mai yana dogaro da yanayin kayan da aka sarrafa. Don ƙarfe mai birgima, ƙarfe mai tsayayyar lalata da sauran kayan ba tare da tsatsa da datti ba, man mai ƙyalli, da wuraren mai shine jagorar jagora, tashar mai, mai tuntuɓar jikin kayan aiki da hannun riga, da ƙananan mold. Yi amfani da man inji mai haske don mai.

Kayan da tsatsa da sikeli, za a tsotse micro foda tsakanin faranti da jagorar daji lokacin sarrafawa, samar da ƙazanta, yin naushi ba zai iya zamewa da yardar kaina a cikin daji jagora ba, a wannan yanayin, idan aka shafa mai, zai yi tsatsa da sikeli mafi sauƙin tabo, don haka lokacin buga wannan kayan, a maimakon haka, goge man mai tsabta, rugujewa sau ɗaya a wata, yi amfani da tururi (diesel) man don cire datti daga bugun da ƙananan mutu, kuma sake goge shi da tsabta kafin sake haɗuwa. Wannan zai tabbatar da cewa injin yana da kyakkyawan aikin lubrication.

Tara, yin amfani da ƙyallen sau da yawa yana bayyana yayin aiwatar da matsaloli da mafita
Matsala ta 1: Farantin yana fitowa daga muƙamuƙi
Dalilin Magani
Ba a cika sauke matattun ba 1. Yi amfani da naushi da gangara
2. Aiwatar da ruwa mai shafawa akan farantin
3. Yi amfani da mutuƙar nauyi

Matsala ta 2ã € Tsananin mutuwa
Dalilin Magani
Rashin mutuƙar rashin hankali (ƙanana) Ƙara mutuwar mutuwa
Wurin zama babba da ƙananan ba a tsakiya 1. Daidaitaccen tashar aiki, babba da ƙananan ƙirar kera
2. Daidaita matakin turret
Ba dace da maye gurbin abubuwan jagorar mutuƙar da aka saka da shigar da turret Sauya
Punch overheating 1.Dara ruwa mai shafawa akan kayan farantin
2. Tabbatar da shafawa tsakanin naushi da na ƙasa
3ã € Yi amfani da saiti fiye da ɗaya na girman daidai a hanya ɗaya
Hanyar da ba ta dace ba tana haifar da ƙona mutuƙar, don haka yana haifar da ƙara lalacewa 1ã € Yi amfani da ƙafafun niƙa mai taushi
2ã € Tsaftace ƙafafun niƙa akai -akai
3ã € Ƙananan kayan aikin cin abinci
4ã € isasshen adadin coolant
Tsarin bugun mataki 1ã € Ƙara tazarar mataki
2ã € ptauki nau'in gadar mataki

Matsala ta 3: Punch bel da naushi suna manne tare
Dalilin Magani
Rashin mutuƙar rashin hankali (ƙanana) Ƙara mutuwar mutuwa
Dulling of punch edge Sharpening cikin lokaci
Lubrication mara kyau Yana inganta yanayin lubrication

Matsala ta 4: Komawa baya
Dalilin Magani
Matsalar ƙananan mutuwa Yi amfani da kayan anti-billa don rage mutuwar
Don ƙaramin ramin ramin rami an rage shi da 10%
Diamita mafi girma fiye da 50.00mm, haɓaka rata
Ƙara zira kwallaye a gefen raunin concave
Don naushi, ƙara zurfin shigarwa
Shigarwa na saukar da saman polyurethane
Adopt beveled gefen

Matsala ta 5: Wahala wajen sauke kaya
Dalilin Magani
Rashin mutuƙar rashin hankali (ƙanana) Ƙara mutuwar mutuwa
Punch wear Lokaci mai kaifi
Gajiyawar bazara Sauya bazara
Punch sticking Cire manne

Matsala ta 6: Rufe hayaniya
Dalilin Magani
Wahala wajen saukar da Ƙara ƙarancin mutuƙar mutuwa, man shafawa mai kyau
Ƙara ƙarfin saukewa
Yi amfani da faranti mai saukowa mai laushi
Matsaloli tare da goyan bayan takardar a kan tebur da cikin turret Yi amfani da tallafin sihiri don mutu
Rage girman aiki
Ƙara kauri aiki
Kauri farantin Amfani da ƙyalli mai ƙyalli

X. Kariya don amfani da kayan aiki na musamman
1ã € bugun darjewa ya banbanta da nau'ikan injina iri iri, don haka kula da daidaita girman rufe kayan aikin.
2ã € Tabbatar cewa tsari ya wadatar, don haka yana buƙatar a daidaita shi da kyau, kuma adadin daidaitawa kada ya wuce 0.15mm kowane lokaci, idan adadin daidaitawa ya yi yawa, da sauƙi zai haifar da lalacewar injin da lalacewar mutu.
3ã € Don shimfida shimfidawa, da fatan za a yi amfani da taron bazara mai haske don hana yage kayan takarda ko wahalar sauke kayan saboda rashin daidaituwa, da dai sauransu.
4ã € Shigar da nau'in goyan bayan nau'in ƙwallo a kusa da ƙirar don hana takardar karkatawa.
5ã € Tsarin matsayi ya kamata ya yi nesa da jaƙayen ƙulluwa sosai.
6ã process Tsarin tsari ya fi dacewa a sanya shi a ƙarshen aikin sarrafawa don cimmawa.
7ã € Tabbatar tabbatar da kyakkyawan lubrication na takardar.
8ã € Lokacin yin odar, kula da matsalar ba da hanya zuwa kayan aikin musamman. Idan tazara tsakanin tsari biyu yana kusa, da fatan za a tabbatar da sadarwa tare da mai siyar da mu.
9ã € Saboda kayan aikin samar da kayan yana buƙatar lokacin saukarwa mai tsawo, don haka aiwatar da ƙirƙirar dole ne yayi amfani da ƙarancin gudu, zai fi dacewa tare da jinkiri.

Goma sha ɗaya, yin amfani da matakan wuka masu yanke kusurwa huɗu
1ã distance Tazarar mataki gwargwadon iko, don zama sama da 80% na duk tsawon kayan aikin.
2ã € Zai fi kyau a fahimci tsalle tsalle ta hanyar shirye -shirye.
3ã € Ana ba da shawarar yin amfani da ƙyalli mai ƙyalli.

12ã € Yadda ake yin naushi a ƙarƙashin sharaɗin cewa ƙarfin ƙimar na injin bai wuce ba
Yayin aiwatar da samarwa, ya zama dole a buga rami mai zagaye wanda ya fi 114.3mm diamita. Irin wannan babban rami zai wuce iyakar babba na ƙarfin ikon injin, musamman don manyan ƙarfin ƙarfi. Ana iya magance wannan matsalar ta hanyar huda manyan ramuka masu yawa ta hanyar bugawa da yawa. Yin amfani da ƙaramin mutuwa don yin sheƙa tare da da'irar da ta fi girma na iya rage ƙarfin bugun da rabi ko fiye, kuma tabbas yawancin mutuwar da kuka riga kuka yi na iya yin hakan. Misalai masu zuwa suna nuna cewa ana iya bugun da'irar manyan ramukan rami ta amfani da zagaye, ninki D, murabba'i tare da kusurwoyi masu zagaye, da sifar ruwan tabarau mai ƙyalli ta mutu, bi da bi. A cikin dukkan lokuta uku, ɓarkewar ya faɗi daga ƙasa kuma babu ragowar da aka bari akan teburin.

XIII. Hanya mai sauƙi don bugun manyan ramuka masu zagaye
Za'a iya yin wannan mutuƙar ruwan tabarau mai ƙyalli don girman radius ɗin da kuke so. Idan diamita ramin ya zarce ƙarfin ikon bugun, muna ba da shawarar yin amfani da zaɓi (A). Yi amfani da wannan mutuƙar don bugun kewaye da'irar. Idan ana iya bugun ramin a cikin ƙarfin ikon bugun, to radial mutu da madaidaicin ruwan tabarau na iya bugun ramin da ake so a cikin wucewa huɗu ba tare da juya mutuƙar ba (B)

XIV. Ƙirƙirar ƙasa kawai a ƙarshen
Lokacin da aka zaɓi mutuƙar mutuƙar fata, yakamata a guji yin ƙasa saboda zai ɗauki sararin samaniya da yawa kuma yana haifar da ƙarin karkacewa ko lanƙwasa takardar. Hakanan yin ƙasa zai iya kamawa a cikin ƙananan mutu sannan a fitar da shi daga cikin turret, duk da haka, idan ƙirar ƙasa ita ce zaɓin tsari kawai, to yakamata ya zama mataki na ƙarshe a cikin tsari don takardar.

Hana murdiyar kayan
Idan kuna buƙatar buga ɗimbin ramuka a cikin takardar kuma takardar ba ta zama a kwance ba, dalilin na iya zama tarin damuwar naushi. Lokacin da aka huda rami, abin da ke kusa da ramin yana miƙawa ƙasa, yana ƙara ƙarfin damuwa a saman saman farantin. Ƙunƙarar taɓarɓarewar ƙasa kuma tana haifar da ƙaruwa a cikin matsin lamba akan ƙananan saman takardar. Ga ƙaramin ramuka, sakamakon ba a bayyane yake ba, amma yayin da adadin ramukan da aka buga ya ƙaru, ƙwanƙwasawa da matsin lamba suna ƙaruwa sosai har sai takardar ta lalace.

Hanya ɗaya don kawar da wannan murdiyar ita ce ta bugi kowane rami sannan kuma a dawo don ɗora sauran ramukan. Wannan yana haifar da matsin lamba iri ɗaya a cikin takardar, amma yana wargaza matsin lamba/matsin lamba wanda ke taruwa sakamakon bugun ɗaya bayan ɗaya a cikin shugabanci ɗaya. Wannan kuma yana ba rukunin rukunin ramuka na farko damar raba raunin naɓarɓarewar rukuni na ramuka na biyu.

Goma sha shida, idan naku bakin karfe flanging nakasa
A cikin ƙera flanging kafin aikace-aikacen mai ƙamshi mai ƙyalli mai ƙyalli zuwa ga kayan, wanda zai iya sa kayan sun fi rabuwa da kwandon, a cikin samuwar motsi mai santsi a cikin ƙananan mutuƙar ƙasa. Wannan yana ba kayan damar mafi kyawun damar rarraba damuwar da aka samu ta hanyar lanƙwasawa da shimfidawa, hana nakasa da sawa a ƙarƙashin ramin da aka ƙulla a cikin ƙira.

XVII. Shawarwari don shawo kan wahalar saukewa
1ã € Yi amfani da ƙwanƙwasawa tare da barbashi na roba mai kyau.
2ã € Ƙara yarda da ƙananan mutu.
3ã € Duba matakin gajiya na bazara.
4ã € Yi amfani da nau'in nauyi mai nauyi ya mutu.
5ã € Rage lalacewa da tsagewa.
6、Adopt beveled gefen die appropriately.
7ã € Lubricate farantin.
8ã € Babban tashar aikikyawon tsayuwabuƙatar shigar da polyurethane mai saukar da kai.

18ã € Babban dalilin fashewar fashewa
1ã € Kaifin baki. Mafi girman zagaye na gefen, mafi kusantar haifar da koma baya.
2ã € Yawan shigar shigarwa. Kowace tashar mutu tana buga tambarin, buƙatun adadin shigowar ƙirar tabbatacce ne, adadin shigowar ƙirar ƙarami ne, mai sauƙin haifar da koma baya.
3ã € Tazarar mutuƙar tana da ma'ana. Kashewar rashin hankali mara hankali zai iya haifar da sake dawowa.
4ã € Ko akwai mai a saman takardar da ake sarrafawa.