Ƙarfin guga ma'auni ne na matsakaicin ƙarar kayan da za'a iya ɗauka a cikin guga na tona baya.Ana iya auna ƙarfin guga ko dai a cikin ƙarfin da aka buga ko kuma a tara ƙarfin kamar yadda aka bayyana a ƙasa:
Ƙarfin bugu an bayyana shi azaman: Ƙarfin ƙarar guga bayan an buge shi a jirgin yajin aikin.Jirgin yajin ya ratsa ta saman baya na guga da yankan gefen kamar yadda aka nuna a hoto 7.1 (a).Za'a iya auna wannan ƙarfin da aka buga kai tsaye daga ƙirar 3D na tono guga na baya.
A gefe guda ana yin lissafin ƙarfin da aka tara ta hanyar bin ka'idodi.A duniya ma'auni guda biyu da aka yi amfani da su don ƙayyade ƙarfin da aka tara, sune: (i) SAE J296: "Mini excavator da backhoe bucket volumetric rating", mizanin Amurka (Mehta Gaurav K., 2006), (Komatsu, 2006) (ii) CECE ( Kwamitin Kayayyakin Gine-gine na Turai) ƙa'idar Turai (Mehta Gaurav K., 2006), (Komatsu, 2006).
Ƙarfin da aka tara an ayyana shi azaman: Jimlar ƙarfin bugun da ƙarar abin da ya wuce kima da aka tara akan guga a kusurwar 1:1 na hutawa (bisa ga SAE) ko kuma a kusurwar 1: 2 na hutawa (bisa ga CECE), kamar yadda aka nuna a hoto na 7.1 (b).Wannan ba yana nufin cewa farat ɗin dole ne ya ɗauki guga ya daidaita a cikin wannan hali, ko kuma cewa duk kayan za su sami kusurwar 1: 1 ko 1: 2 na hutawa.
Kamar yadda ake iya gani daga siffa 7.1 za a iya ba da ƙarfin da aka tara tarin Vh kamar haka:
Vh=Vs+Ve….(7.1)
Inda, Vs shine ƙarfin da aka buga, kuma Ve shine ƙarfin kayan da ya wuce gona da iri da aka tara ko dai a 1:1 ko a kusurwar 1:2 na hutu kamar yadda aka nuna a hoto 7.1 (b).
Da fari dai, daga siffa 7.2 buga iya aiki Vs daidaici za a gabatar, sa'an nan ta amfani da biyu hanyoyin SAE da CECE, biyu equations na wuce haddi kayan girma ko iya aiki Ve daga siffa 7.2.A ƙarshe ana iya samun ƙarfin tulin guga daga lissafin (7.1).
Hoto 7.2 Ƙimar ƙarfin bucket (a) Bisa ga SAE (b) A cewar CECE
- Bayanin sharuddan da aka yi amfani da su a cikin siffa 7.2 shine kamar haka:
- LB: Bucket Bucket, auna daga yankan baki zuwa ƙarshen farantin gindin guga.
- Wc: Yanke nisa, auna kan hakora ko masu yankan gefe (lura cewa samfurin 3D na guga da aka gabatar a cikin wannan kasida kawai don aikin ginin aikin haske ne kawai, don haka ba a haɗa masu yankan gefe a cikin ƙirarmu).
- WB: Faɗin guga, wanda aka auna akan gefen guga a ƙananan leɓe ba tare da haƙoran masu yankan gefe ba a haɗe (don haka wannan kuma ba zai zama muhimmin ma'auni na 108 don ƙirar guga na 3D da aka tsara ba saboda ba ya ƙunshi kowane yanki na gefe).
- Wf: Ciki da faɗin gaba, aunawa a yankan gefen ko masu kare gefe.
- Wr: Ciki nisa na baya, an auna shi a mafi kunkuntar sashi a bayan guga.
- PArea: Yankin bayanin martaba na gefen guga, an ɗaure shi da kwandon ciki da jirgin yajin guga.
Hoto 7.3 yana nuna mahimman sigogi don ƙididdige ƙarfin guga don ƙirar 3D da aka tsara na guga.Lissafin da aka yi ya dogara ne akan ma'auni na SAE kamar yadda wannan ma'auni ke karɓuwa a duniya kuma ana amfani dashi.