iindaba

Zithini kanye kanye ii-dimensional tolerances, i-basic dimensions, kunye ne-limited dimensions?

 

In ibhereyithaUkukhetha nokufakela, sihlala sidibana namagama obuchwephesha athi "dimensional tolerances," "basic dimensions," kunye "limit dimensions." Avakala ngathi "eyobunjineli" kakhulu, kodwa ukuqonda ezi ngcamango kubalulekile ekuphuculeni ukuchaneka kwendibano kunye nokwandisaibhereyithaubomi.

 

1. Yintoni ubukhulu obusisiseko?

 

Umlinganiselo osisiseko ngumlinganiselo wethiyori wenxalenye njengoko uphawulwe kwimizobo yoyilo; unokuqondwa njengomlinganiselo phantsi "kweemeko ezifanelekileyo." Umzekelo, ukuba ububanzi bangaphakathi bebhereyitha buphawulwe njenge-50mm, le 50mm ngumlinganiselo wayo osisiseko.

 

Yindawo yokuqala yoyilo;

 

Nangona kunjalo, kwimishini yokwenyani, kunzima ukufikelela kwi-100% yokuchaneka;

 

Ke ngoko, kukho "ukunyamezelana" kunye "nobukhulu bomda".

 

2. Yintoni ukunyamezelana okunemilinganiselo?

 

Sonke siyazi ukuba umatshini wokugaya awunakufikelela "kuchaneko olupheleleyo." Nezixhobo ezichanekileyo ziya kuba nenqanaba elithile lempazamo. Uluhlu oluvumelekileyo lwale mpazamo kukunyamezelana okulinganayo.

 

Ukunyamezelana kobukhulu = Ixabiso lokuphambuka okuphezulu - Ixabiso lokuphambuka eliphantsi. Ichaza uluhlu oluphezulu oluvumelekileyo lokuguquguquka kwimilinganiselo yenxalenye.

 

Umzekelo: Ubungakanani obusisiseko bomngxuma yi-50mm, kwaye uluhlu oluvumelekileyo luyi-+0.02 / -0.01mm, emva koko ukunyamezelana kwawo ngobukhulu yi-0.03mm.

 

Ukunyamezelana akunikezelwa ngokungacwangciswanga; kusekelwe kwimigangatho yesizwe (efana ne-ISO, i-GB, njl.njl.). Amanqanaba okunyamezelana ahlukeneyo amele iimfuno ezahlukeneyo zokuchaneka.

 

3. Zithini imilinganiselo yomda?

 

Ubukhulu bomda buyimida ephezulu nesezantsi yobukhulu obubalwe ngokusekelwe "kubungakanani obusisiseko" kunye "nokunyamezelana okulinganayo."

 

Ukuqhubeka nomzekelo ongentla:

Ubungakanani obusisiseko: 50mm

Ukunyamezelana: +0.02/-0.01mm

Emva koko imilinganiselo yayo yomda yile:

Ubukhulu bomda obuphezulu = 50 + 0.02 = 50.02mm

Ubungakanani obuncinci bomda = 50 - 0.01 = 49.99mm

Ngamanye amazwi, logama nje ubungakanani bokwenyani buphakathi kwe-49.99mm kunye ne-50.02mm, loo nxalenye ithathwa njengefanelekileyo/yamkelekileyo.

 

Kutheni le nto le milinganiselo ibalulekile kwiibheringi?

 

Iibheringi, njengezinto ezichanekileyo kakhulu, zinemfuno ephezulu kakhulu yobukhulu bokufakelwa. Ukuphambuka okugqithisileyo kobukhulu kunokukhokelela kwezi ngxaki zilandelayo: Ukususwa okugqithisileyo: Kuchaphazela ukuchaneka kokusebenza kwaye kubangele ukungcangcazela; Ukulingana okuqinileyo kakhulu: Kwandisa ukungqubana, okukhokelela ekutshiseni kakhulu okanye ekubambeni; Ukuguguleka okukhawulezileyo: Kunciphisa ubomi bokuthwala; Ukufakelwa okunzima: Kuchaphazela ukusebenza kakuhle kwendibano kunye neendleko.

 

Ukufunda olu lwazi akuyi kukunceda kuphela ekukhetheni iibheringi ezifanelekileyo kodwa kuya kuthintela nemingcipheko eqhelekileyo yokuhlanganisa, ukuqinisekisa ukusebenza komatshini okubushelelezi nokuthembekileyo ngakumbi!