M2 txuj 0.40 xov zoo 0.25
M2.5 txheem 0.45 zoo xov 0.35
M2.6 txheem 0.45 zoo xov 0.35
M3 txuj 0.50 xov zoo 0.35
M3.5 txheem 0.60 xov zoo 0.35
M4 txheem 0.70 xov zoo 0.50
M5 Standard 0.80 Fine Thread 0.50
M6 txuj 1.00 xov zoo 0.75
M8 txuj 1.25 zoo xov 1 1 00 xov zoo 2 0.75
M10 tus qauv 1.50 zoo xov 1 1.25 xov zoo 2 1.00 xov zoo 3 0.75
M12 txheem 1.75 nplua xov 1 1.50 nplua xov 2 1.25 xov zoo 3 1.00
M14 standard 2.00 xov zoo 1 1.50 xov zoo 2 1.00
M16 txuj 2.00 xov zoo 1 1.50 xov zoo 2 1.00
M18 tus qauv 2.50 zoo xov 1 2.00 xov zoo 2 1.50 xov zoo 3 1.00
Cov qib kev ua tau zoo ntawm bolts rau steel qauv kev sib txuas tau muab faib ua ntau tshaj 10 qib xws li 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, ntawm cov bolts ntawm qib 8.8 thiab siab dua yog ua los ntawm cov qib qis- carbon alloy steel los yog nruab nrab-carbon steel thiab tau txais kev kho cua sov (quenching, tempering), feem ntau hu ua high-strength bolts, thiab tus so feem ntau hu ua bolts zoo tib yam.
Daim ntawv qhia qib qib bolt muaj ob feem ntawm cov lej, uas feem ntau sawv cev rau tus nqi nominal tensile lub zog thiab cov txiaj ntsig lub zog piv ntawm cov khoom siv ntsia liaj qhov rooj. Piv txwv li: bolts nrog kev kawm qib 4.6, nws lub ntsiab lus yog:
1. Lub nominal tensile lub zog ntawm cov khoom siv ntsia liaj qhov rooj ncav cuag 400MPa; 2. Qhov sib piv ntawm cov khoom siv ntsia liaj qhov rooj yog 0.6;
3. Lub nominal yield zog ntawm cov khoom siv ntsia liaj qhov rooj nce mus txog 400 × 0.6=240 MPa qib.
Kev ua tau zoo qib 10.9 siab zog bolts, tom qab kev kho cua sov, tuaj yeem ncav cuag:
1. Lub nominal tensile lub zog ntawm cov khoom siv ntsia liaj qhov rooj ncav cuag 1000MPa;
2. Qhov sib piv ntawm lub zog ntawm cov khoom siv ntsia liaj qhov rooj yog 0.9;
3. Lub nominal yield zog ntawm cov khoom siv ntsia liaj qhov rooj ncav cuag 1000 × 0.9=900MPa theem
Lub ntsiab lus ntawm bolt kev ua tau zoo qib yog tus qauv thoob ntiaj teb. Bolts ntawm tib qib kev ua tau zoo tib yam tsis hais qhov txawv ntawm lawv cov ntaub ntawv thiab keeb kwm. Tsuas yog qib kev ua tau zoo tuaj yeem xaiv rau kev tsim.
Lub npe hu ua 8.8 thiab 10.9 qib zog txhais tau hais tias cov qib kev nyuaj siab ntawm cov bolts yog 8.8GPa thiab 10.9GPa8.8, lub zog tensile nominal yog 800N / MM2, thiab lub zog nominal yield yog 640N / MM2.
General bolts siv "XY" los qhia lub zog, X * 100= tensile lub zog ntawm lub ntsia liaj qhov rooj, X * 100 * (Y / 10)= tawm lub zog ntawm lub ntsia liaj qhov rooj (vim raws li daim ntawv lo: yield lub zog / tensile zog =Y/10)
Xws li qib 4.8, lub zog tensile ntawm lub ntsia liaj qhov rooj yog: 400MPa; Lub zog tawm los yog: 400 * 8 / 10=320MPa.
Lwm qhov: stainless hlau bolts feem ntau yog cim raws li A4-70, A2-70, lub ntsiab lus piav qhia lwm yam
Kev Ntsuas: Feem ntau muaj ob hom kev ntsuas qhov ntev nyob hauv lub ntiaj teb niaj hnub no, ib qho yog qhov ntsuas ntsuas, thiab cov ntsuas ntsuas yog meters (m), centimeters (cm), millimeters (mm), thiab lwm yam, uas yog siv dav hauv Southeast Asia xws li Europe, kuv lub teb chaws, thiab Nyiv. Lwm qhov yog imperial system, thiab chav ntsuas ntawm qhov ntsuas feem ntau yog ntiv tes, uas yog sib npaug rau cov txheej txheem qub hauv kuv lub tebchaws, thiab tau siv dav hauv Tebchaws Meskas, Tebchaws Askiv thiab lwm lub tebchaws European thiab Asmeskas. Cov pej xeem account "Mechanical Engineering Literature", chaw nres tsheb roj rau cov kws ua haujlwm!
1. Metric ntsuas: (decimal system) 1m=100 cm=1000 mm
2. Inch ntsuas: (octal system) 1 nti=8 xees 1 nti=25.4 mm 3/8¢¢ × 25.4 =9 52 3. Cov khoom lag luam hauv qab 1/4¢ ¢ siv cov lej los qhia lawv txoj kab uas hla, xws li: 4 #, 5 #, 6 #, 7 #, 8 #, 10 #, 12 # xov
1. Cov xov yog ib yam zoo li cov helical protrusions ntawm tus ntoo khaub lig-section ntawm sab nrauv lossis sab hauv ntawm ib qho khoom. Raws li nws cov yam ntxwv thiab kev siv, nws tuaj yeem muab faib ua peb pawg:
(1) Cov xov zoo tib yam: cov hniav zoo li daim duab peb sab, uas yog siv los txuas lossis khi qhov chaw. Ordinary threads tau muab faib ua ntxhib thiab nplua xov raws li lub suab, thiab kev sib txuas lub zog ntawm cov xov zoo yog siab dua.
(2) Kev sib kis xov: Cov hniav zoo li muaj xws li trapezoidal, rectangular, zigzag thiab triangular.
(3) Sealing xov: siv rau sealing kev twb kev txuas, feem ntau yog cov yeeb nkab xov, tapered xov thiab tapered yeeb nkab xov.
2. Xov haum qib:
Xov haum yog qib ntawm looseness los yog nruj ntawm cov ntsia hlau threads, thiab cov degree ntawm haum yog cov txheej txheem ua ke ntawm deviations thiab tolerances ua nyob rau hauv thiab sab nraud threads.
(1) Rau cov xov British sib koom ua ke, muaj peb qib xov rau cov xov sab nraud: 1A, 2A thiab 3A, thiab peb qib rau cov xov sab hauv: 1B, 2B thiab 3B, tag nrho cov no yog qhov haum. Tus lej qib siab dua, qhov nruj dua. Hauv cov xov ntiv tes, qhov sib txawv tsuas yog qhia qib 1A thiab 2A, qhov sib txawv ntawm qib 3A yog xoom, thiab qib sib txawv ntawm qib 1A thiab qib 2A sib npaug. Qhov loj ntawm cov qhab nia, qhov me dua qhov kam rau ua.
1, 1A thiab 1B qib, cov qib xoob xoob heev, uas tsim nyog rau kev zam haum ntawm cov xov sab hauv thiab sab nraud.
2, 2A thiab 2B qib yog cov qib siab siab tshaj plaws uas tau teev tseg rau imperial series mechanical fasteners.
3, 3A thiab 3B qib, screwed ua ke los tsim kom nruj nruj, haum rau fasteners nrog nruj tolerances, thiab siv rau kev nyab xeeb-tsim qauv tsim.
4. Rau cov xov sab nraud, qib 1A thiab 2A muaj qhov haum haum, tab sis qib 3A tsis muaj. Class 1A tolerances yog 50 feem pua loj dua Class 2A tolerances, 75 feem pua loj dua Class 3A tolerances, thiab Class 2B tolerances yog 30 feem pua loj dua Class 2A kam rau ua rau cov xov sab hauv. Chav Kawm 1B yog 50 feem pua loj dua Class 2B thiab 75 feem pua loj dua Chav Kawm 3B.
(2) Rau cov xov metric, muaj peb qib xov rau cov xov sab nraud: 4h, 6h thiab 6g, thiab peb qib xov rau cov xov sab hauv: 5H, 6H, thiab 7H. (Cov txheej txheem Japanese xov raug muab faib ua peb qib: I, II, thiab III, thiab feem ntau yog qib II.) Hauv cov xov metric, qhov sib txawv ntawm H thiab h yog xoom. Qhov sib txawv ntawm G yog qhov zoo, thiab qhov sib txawv ntawm e, f thiab g yog qhov tsis zoo. raws li daim duab qhia:
1. H yog qhov feem ntau siv rau kev ua siab ntev ntawm txoj haujlwm rau cov xov sab hauv, thiab feem ntau tsis siv los ua cov txheej txheej saum npoo, los yog siv cov txheej phosphating nyias nyias. Qhov sib txawv ntawm G txoj haujlwm yog siv rau lub sijhawm tshwj xeeb, xws li cov txheej tuab, thiab feem ntau tsis tshua siv.
2. g feem ntau yog siv los ua phaj nyias txheej ntawm 6-9um. Yog tias cov khoom kos duab xav tau lub bolt ntawm 6h, cov xov ua ntej plating txais ib cheeb tsam kam rau ntawm 6g. Cov pej xeem account "Mechanical Engineering Literature", chaw nres tsheb roj rau cov kws ua haujlwm!
3. Cov xov haum zoo tshaj plaws ua ke rau hauv H / g, H / h lossis G / h. Rau cov xov ntawm refined fasteners xws li bolts thiab ceev, tus qauv pom zoo 6H / 6g haum
(peb), xov mark
Plaub, lub ntsiab geometric tsis ntawm tus kheej tapping thiab nws tus kheej tho threads:
(1) Qhov loj txoj kab uas hla / hniav txheej sab nraud (d1) yog txoj kab uas hla ntawm lub tog raj kheej xav txog qhov twg cov crests ntawm cov xov sib tshooj. Cov xov loj txoj kab uas hla yeej sawv cev rau lub nominal txoj kab uas hla ntawm xov loj.
(2) Txoj kab uas hla me me / hauv paus txoj kab uas hla (d2): Nws yog txoj kab uas hla ntawm lub tog raj kheej xav txog qhov twg cov xov hauv qab sib tshooj.
(3) Hniav pitch (p): Nws yog qhov axial nrug ntawm cov hniav uas nyob ib sab coj mus rau ob lub ntsiab lus ntawm nruab nrab meridian. Nyob rau hauv lub imperial system, tus hniav nyob deb yog qhia los ntawm tus naj npawb ntawm cov hniav ib nti (25.4 hli).
Cov lus hauv qab no teev cov kev qhia tshwj xeeb ntawm cov hniav pitch (metric system) thiab tus naj npawb ntawm cov hniav (imperial system)
1. Metric tus kheej tapping hniav:
Specifications: ST 1.5, ST1.9, ST2.2, ST2.6, ST2.9, ST3.3, ST3.5, ST3.9, ST4.2, ST4.8, S T5.5, S T6.3 , S T8.0, S T9.5
Pitch: {{0}}.5, 0.6, 0.8, 0.9, 1.1, 1.3, 1.3, 1.3, 1.4, 1.6, 1.8, 1.8, 2.1, 2. 1 2. Inch self-tapping hniav:
Specifications: 4#, 5#, 6#, 7#, 8#, 10#, 12#, 14# Cov hniav: AB hniav 24, 20, 20, 19, 18, 16, 14, 14 A hniav 24, 20, 18, 16, 15, 12, 11, 10
Specifications thiab qauv - GB qauv
Square taub hau bolts Qib C GB 8-88 Countersunk taub hau square caj dab bolts GB 10-88 Countersunk taub hau tenon bolts GB 11-88 Ib nrab taub hau square neck bolts GB 12-88 Ib nrab taub hau tenon bolts GB 13-88
Loj ib nrab puag ncig lub taub hau square caj dab bolts Qib C GB 14-1998 Loj ib nrab puag ncig lub taub hau bolts nrog mortise GB 15-88
Hla recessed hex taub hau bolts GB 29.2-88
Lub taub hau bolts Qib B GB 35-88 Bolts rau slots GB 37-88
Txhawb nqa ib nrab-round taub hau square caj dab bolts GB / T794-93 viav vias bolts GB 798-88 Thauj tog rau nkoj bolts GB 799-88 Countersunk taub hau ob chav mortise screws GB 800-88
Me me puag ncig ib nrab taub hau qis square caj dab bolts Qib B GB / T 801-1998
GB/T 9 0-1985 Txais Kev Tshuaj Xyuas, Kos Npe thiab Ntim Cov Khoom Txuas Txuas (eqvISO 3269: 1984) GB/T 1 96-1981 Qhov Loj Loj ntawm Cov Xov Xwm Txheej Txheem (inch 1-600mm) GB/T {{5 } } Ordinary Threads Tolerance and fit (inch 1^355mm) GB / T 1237-2000 Marking method for fasteners (eqvI SO 8991:1986)
GB/T 3098. txiv ntseej (eqvI SO 4759-1:1978 ) GB /T 5267-1985 Electroplating txheej rau threaded fasteners
GB/T 5276-1985 Fastener bolts, screws, studs thiab txiv ntseej loj cov lej thiab cov cim (eqvI SO 225: 1983) GB/T 1 3912-1992 Cov kev cai rau kev kub-dip galvanized txheej ntawm steel khoom nrog hlau txheej ( NQI SO 1459:1973)
GB/T 16938-1997 General specifications for fastener bolts, screws, studs and nuts (idtI SO 8992:1986) GB/T 18230.3-2000 Loj hex txiv ntseej rau bolted lug Qib B 8 thiab 10 (eqvI SO 4775 :1984) GB/T 18230. quenched thiab tempered (neqISO 7416: 1984)
Bolt size standard (nrog duab)
1. Tus qauv siv rau nti bolts yog ANSI/ASME B18.2.1, thiab tus qauv Japanese hais txog JIS B1180 (Webster's thread). Inch system hais txog BSW916 (Webster hniav).
(1) HEX MACHINE BOLT: tsis muaj ntxhua khaub ncaws, nrog kab kawg, ib nrab hniav hexagonal ntsia liaj qhov rooj,
(2) HEX TAP BOLT: tsis muaj ntxhua khaub ncaws, tsis muaj nqaj kawg, tag nrho cov hniav hexagonal ntsia liaj qhov rooj,
(3) HEX CAP SCREWS: Hexagon bolts nrog washers, beam kawg, thiab ib nrab hniav,
2. Cov qauv siv rau metric bolts yog raws li hauv qab no, thiab lawv qhov sib txawv yog qhia hauv lub rooj:
Lub teb chaws qub qauv Tshiab lub teb chaws tus qauv ISO tus qauv DIN (German standard) GB30
GB5780 (ib nrab hniav) GB5781 (tag nrho hniav) GB5782 (ib nrab hniav)
GB5783 (tag nrho cov hniav) ISO4016 ISO4018 ISO4014
ISO4017 DIN601 DIN558 DIN931
