Plum blossom nrog kem nws tus kheej tapping ntsia hlau

Ntxiv rau qhov sib txawv ntawm qhov loj me xws li lub taub hau mus rau ntug thiab lub taub hau tuab, qhov sib txawv tseem ceeb tshaj plaws hauv cov qauv yog qhov sib txawv ntawm cov xov xov. Cov xov ntawm GB, DIN, JIS, thiab lwm yam yog ntsuas nyob rau hauv millimeters (MM) thiab raug xa mus ua metric threads. Cov xov xws li ANSI, ASME, thiab lwm yam, uas ntsuas hauv nti, hu ua American standard threads. Ntxiv nrog rau metric threads thiab American threads, kuj tseem muaj BSW British tus qauv, uas nws cov xov tseem ntsuas hauv ntiv tes, feem ntau hu ua Wyeth threads.

Metric threads yog ntsuas hauv millimeters (MM) thiab muaj lub kaum sab xis ntawm 60 degrees. Ob American thiab British threads yog ntsuas hauv ntiv tes. Lub kaum sab xis ntawm cov hniav ntawm American xov kuj tseem yog 60 degrees, thaum lub kaum sab xis ntawm cov xov British yog 55 degrees. Vim qhov sib txawv ntawm kev ntsuas, cov qauv kev sawv cev ntawm ntau cov xov kuj tsis zoo ib yam. Piv txwv li, M16-2X60 sawv cev rau metric threads. Nws lub ntsiab lus tshwj xeeb yog qhov nominal txoj kab uas hla ntawm cov ntsia hlau yog 16MM, lub suab yog 2MM, thiab qhov ntev yog 60MM. Piv txwv li, 1/4-20X3/4 sawv cev rau cov xov British, thiab nws lub ntsiab lus tshwj xeeb yog qhov nominal txoj kab uas hla ntawm cov ntsia hlau yog 1/4 nti (ib nti = 25.4MM), nrog 20 cov hniav ntawm ib nti thiab qhov ntev ntawm 3/4 nti. Tsis tas li ntawd, thaum hais txog American screws, UNC thiab UNF feem ntau yog ntxiv tom qab sawv cev rau British screws kom paub qhov txawv ntawm American coarse hniav thiab American zoo hniav.

Hauv peb lub lag luam muag khoom txhua hnub, cov qauv peb feem ntau ntsib yog GB (National Standard) thiab DIN (German Standard).
Hais txog cov khoom tsis muaj ntxhiab, cov qauv hauv qab no feem ntau ntsib: GB30; GB5783; GB5782; GB 62; GB6170; GB818; GB819; GB845; GB846; GB 70; DIN912; DIN933; DIN931, thiab lwm yam tam sim no, GB30 (tus qauv qub hauv tebchaws) tau hloov los ntawm GB5783 (tus qauv tshiab hauv tebchaws) hauv phau ntawv qauv. GB52 (tus qauv qub hauv tebchaws) tau hloov los ntawm GB6170 (tus qauv tshiab hauv tebchaws) hauv phau ntawv qauv.

Xyoo 1986, peb lub teb chaws tau tsim cov qauv tshiab rau cov qauv tsim, feem ntau hu ua tus qauv tshiab hauv kev lag luam. Cov feem ntau siv yog GB5780, GB5781, GB5782, GB5783, thiab GB5784. GB5780 yog ib tug hexagonal taub hau tuab pas nrig ib nrab hniav ntsia hlau nrog ib tug precision theem ntawm C, uas yuav tsum tau hloov los ntawm GB5782 (GB5782 yog ib tug hexagonal taub hau tuab pas nrig tag nrho cov hniav ntsia hlau nrog ib tug precision theem ntawm A thiab B). GB5781 yog lub taub hau hexagonal tag nrho cov hniav ntsia hlau nrog rau qib siab ntawm C. GB5783 tuaj yeem siv los hloov pauv (GB5783 yog lub taub hau hexagonal tag nrho cov hniav ntsia hlau nrog qhov tseeb ntawm A thiab B). GB5784 yog ib tug hexagonal ntsia hlau nrog ib tug nyias pas nrig thiab ib nrab hniav.

Qhov txawv ntawm daim ntawv lo tshiab thiab daim ntawv qub yog tias M8, M10, M12, M14, thiab M22 series cov khoom muaj qhov sib txawv ntawm qhov dav ntawm cov npoo. Tsuas yog cov khoom lag luam tshiab M22 series, lub taub hau ntawm cov khoom lag luam tshiab M8, M10, M12, thiab M14 yog 1MM me dua li cov ntawv qub. Lawv yog 13mm, 16mm, 18mm, thiab 21mm feem. Txawm li cas los xij, rau cov khoom tshiab M22 series, sab nraud ntawm daim ntawv tshiab yog tiag tiag 2MM loj dua li daim ntawv qub, yog li yuav tsum tau them nyiaj tshwj xeeb. Rau lub thickness ntawm lub taub hau, muaj qhov sib txawv me ntsis ntawm cov qauv tshiab thiab qub, uas tuaj yeem siv sib hloov hauv cov xwm txheej uas cov kev cai tsis nruj heev.

Qhov txawv ntawm tus qauv tshiab thiab tus qauv German yog nyob rau hauv cov khoom specifications ntawm M10, M12, M14, thiab M22, uas txawv ntawm qhov dav ntawm cov npoo. Lub taub hau rau ntug tus qauv tshiab ntawm M10, M12, M14 yuav tsum yog 1MM me dua li tus qauv German. Cov khoom tshiab ntawm M22 muaj lub taub hau ntug dav uas yog 2MM dav dua li cov cim ntug dav, thiab tag nrho lwm yam khoom siv tuaj yeem hloov pauv.

Rau hexagonal txiv ntseej, feem ntau siv cov qauv suav nrog GB52, GB6170, GB6172, thiab DIN934. Qhov sib txawv tseem ceeb ntawm lawv yog GB6170 yog tuab dua GB52, GB6172, thiab DIN934, feem ntau hu ua cov txiv ntoo tuab. Tsis tas li ntawd, muaj qhov sib txawv ntawm cov npoo. Hauv M8 txiv ntoo series, cov npoo ntawm DIN934, GB6170, thiab GB6172 yog 13 hli, uas yog 1MM me dua li 14 hli ntug ntawm GB52. Rau M10 txiv ntseej, cov npoo ntawm DIN934 thiab GB52 yog 17 hli, uas yog 1MM loj dua cov npoo ntawm GB6170 thiab GB6172. Rau M12 txiv ntseej, cov npoo ntawm DIN934 thiab GB52 yog 19 hli, uas yog 1MM loj dua 18 hli ntug ntawm GB6170 thiab GB6172. Rau M14 txiv ntseej, qhov ntxeev ntawm ntug ntawm DIN934 thiab GB52 yog 22 hli, uas yog 1MM loj dua li tus ntug ntawm GB6170 thiab GB6172, uas yog 21 hli. Tsis tas li ntawd, M22 txiv ntoo muaj 32MM opposite ntug rau DIN934 thiab GB52, uas yog 2MM me dua 34MM opposite ntug rau GB6170 thiab GB6172. GB6170 thiab GB6172 muaj raws nraim tib lub ntug dav tshwj tsis yog rau lawv cov thicknesses sib txawv. Tag nrho lwm cov kev qhia tshwj xeeb tuaj yeem siv sib hloov yam tsis xav txog qhov tuab.