Muaj ntau hom txiv ntseej, ntawm cov txiv ntoo zoo yog ib hom ntawm cov xov fasteners. Fine pitch nuts yog tsim rau kev sib txuas siab -ceev rotating lossis txav cov khoom. Vim yog lub kaum sab xis me me ntawm cov xov, lawv xa tau zoo heev los tiv thaiv -loosing kev ua tau zoo tom qab zawm thiab xauv. Tsis tas li ntawd, lub suab zootxiv ntseejyog dav saws los kho axial clearance ntawm machinery khoom, tshwj xeeb tshaj yog rau preloading spindle bearings thiab trimming axial clearance ntawm tshuab cuab yeej.
Thaum siv cov txiv ntseej zoo, lawv lub zog tensile thiab lub zog txhua yam yuav tsum tau txiav txim siab tag nrho. Kev xaiv tsis raug lossis tsis yog- kev ua haujlwm tus qauv yuav ua rau lub neej ua haujlwm ntawm cov txiv ntoo zoo thiab ua rau muaj kev pheej hmoo tsis txaus ntseeg rau kev saib xyuas cov khoom siv. Mastering ua tiav xov tsis zoo ntawm cov txiv ntseej zoo pab kom tsis txhob muaj qhov yuam kev los ua ke thiab txhawb kev daws teeb meem.
1. Cov txheej txheem tshawb nrhiav pom zoo rau cov xov xov zoo
Kev ntsuas ntawm xov suav nrog lub kaum sab xisCov xov nrog lub kaum sab xis kuj hu ua xov profile kaum. Nws tuaj yeem ntsuas tau los ntawm kev suav lub kaum sab xis, uas yog hais txog lub kaum sab xis ntawm cov xov flank thiab lub dav hlau perpendicular rau cov xov axis. Thaum lub sij hawm ntsuas, ntau cov ntsiab lus piv txwv yog coj raws cov ntu ncaj ntawm ob sab ntawm cov xov profile, thiab qhov tsawg tshaj plaws square method yog siv rau linear haum ntawm cov ntsiab lus piv txwv los xam cov xov profile kaum.
Kev ntsuas pitchPitch yog txhais raws li qhov axial nrug ntawm ib qho taw tes ntawm ib txoj xov mus rau qhov sib thooj ntawm cov xov uas nyob ib sab. Kev ntsuas yuav tsum tau nqa tawm thaum uas tig mus rau lub xov axis.
Kev ntsuas ntawm Xov Pitch DiameterLub pitch txoj kab uas hla ntawm xov yog hais txog lub perpendicular nrug ntawm lub suab kab mus rau xov axis. Lub suab kab yog ib qho kev xav ntawm generatrix ntawm lub tog raj kheej, ua haujlwm raws li qhov tseem ceeb ntawm kev tswj cov xov haum qhov tseeb.
2. Kev sib xyaw ntawm Tsis Siv Neeg Xov Tshuaj Ntsuam Xyuas Txheej Txheem
2.1 Hardware System
Lub kaw lus tsis siv neeg xov tsis siv neeg soj ntsuam siv lub PC-raws li lub hauv paus. Nws cov khoom kho vajtse muaj lub teeb pom kev zoo, CCD lub koob yees duab thiab kho qhov muag pom kev, daim ntawv yuav khoom, cov duab ua haujlwm, kev tshuaj xyuas txhua yam, hluav taws xob tswj qhov system thiab lwm yam khoom siv.
Kev soj ntsuam kev ua haujlwm: Tom qab teeb pom kev zoo los ntawm lub teeb pom kev zoo, CCD lub koob yees duab thiab lub kaw lus kho qhov muag ntes cov duab ntawm cov fasteners. Cov duab digital raug xa mus rau lub khoos phis tawj los ntawm daim npav yuav khoom. Lub khoos phis tawj ua cov duab digital nrog cov algorithms sib thooj los xam cov xov tsis tseem ceeb suav nrog lub kaum sab xis profile, suab thiab lub suab kab, sib piv cov ntsuas qhov ntsuas nrog qhov ntev, thiab suav qhov sib txawv ntawm qhov sib txawv.
2.2 Software System
Lub software system rau tsis siv neeg xov parameter ntsuas mas suav nrog lub kaw lus tswj module thiab cov duab ua module.
Kev tswj hwm qhov system: ua tiav tag nrho kev pib, suav nrog kev teeb tsa ntawm daim duab tau txais daim npav thiab cov qauv xov tsis; paub cov duab capture, cia ntawm 8-ntsis greyscale dluab thiab cov duab caching nyob rau hauv lub cim xeeb.
Cov duab ua qauv: Muaj ntau yam algorithms: preprocessing algorithms rau kev txo suab nrov thiab txhim kho cov xov contour npoo; ntug nrhiav thiab rho tawm algorithms rau contour identification; system calibration algorithms rau ntsuas qhov ntev ntawm cov duab digital; algorithms mob siab rau xam tag nrho cov xov parameters.
3. Kev soj ntsuam xyuas
Lub tshuab tsis pom kev-raws li tsis siv neeg xov tshuaj xyuas qhov system yog tsim los ntsuas cov xov nrog lub kaum sab xis, lub suab, lub suab kab thiab lwm yam tsis zoo ntawm cov qauv xov. Tag nrho cov ntsuas ntsuas poob nyob rau hauv qhov tso cai kam rau ua. Featuring high efficiency thiab txhim khu kev qha stability, tshuab lub zeem muag tshuaj ntsuam xyuas muaj feem xyuam rau loj ntau lawm zoo soj ntsuam.
4. Basic Profile ntawm Unified Screw Xov
Lub contour zoo ntawm ib tug xov ntawm lub dav hlau ntev dhau los ntawm cov xov axis yog txhais raws li xov profile. Lub kaum sab xis nyob nruab nrab ntawm cov flanks ntawm ob cov hniav uas nyob ib sab yog cov xov profile kaum. Metric dav sib txuas threads txais cov duab peb sab nrog tus qauv profile kaum ntawm 60 degree.
5. Cov lus qhia txog cov Metric Fine Pitch Thread Specifications thiab Tapping Drill Size
Thawj kem teev cov metric xov specifications, ua raws li coarse suab, laum txoj kab uas hla rau ntxhib tapping, ob xaiv zoo pitches. Cov kab tom ntej sib raug rau UNC, UNF imperial xov specifications, nrog rau kev sib tw laum diameters. Metric threads dominate domestic manufacturing. Lub laum txoj kab uas hla rau metric tapping sib npaug qhov loj ntawm lub laum me ntsis yuav tsum tau siv. Siv M48 ua piv txwv: coarse suab=5 hli, tapping laum txoj kab uas hla=43 hli.
表格
| Metric Loj | Coarse Pitch (mm) | Coarse Tap Laum (mm) | Pitch 1 (mm) | Pitch 2 (mm) | UNC Loj / Threads per Inch | UNC Laum (mm) | UNF Loj / Threads per Inch | UNF Laum (mm) |
|---|---|---|---|---|---|---|---|---|
| M1 | 0.25 | 0.75 | - | - | #1-64 | 1.55 | #0-80 | 1.30 |
| M2 | 0.40 | 1.60 | - | - | #2-56 | 1.83 | #1-72 | 1.60 |
| M2.5 | 0.45 | 2.05 | - | - | #3-48 | 2.10 | #2-64 | 1.90 |
| M3 | 0.50 | 2.50 | - | - | #4-40 | 2.35 | #3-56 | 2.10 |
| M4 | 0.70 | 3.30 | - | - | #5-40 | 2.65 | #4-48 | 2.40 |
| M5 | 0.80 | 4.20 | - | - | #6-32 | 2.85 | #5-44 | 2.70 |
| M6 | 1.00 | 5.00 | - | - | #8-32 | 3.50 | #6-40 | 3.00 |
| M7 | 1.00 | 6.00 | - | - | #10-24 | 3.90 | #8-36 | 3.50 |
| M8 | 1.25 | 6.80 | 1.00 | - | #12-24 | 4.50 | #10-32 | 4.10 |
| M9 | 1.25 | 7.80 | 1.00 | - | 1/4"-20 | 5.20 | #12-28 | 4.70 |
| M10 | 1.50 | 8.50 | 1.25 | 1.00 | 5/16"-18 | 6.60 | 1/4"-28 | 5.50 |
| M12 | 1.75 | 10.20 | 1.50 | 1.25 | 3/8"-16 | 8.00 | 5/16"-24 | 6.90 |
| M14 | 2.00 | 12.00 | 1.50 | - | 7/16"-14 | 9.40 | 3/8"-24 | 8.50 |
| M16 | 2.00 | 14.00 | 1.50 | - | 1/2"-13 | 10.80 | 7/16"-20 | 9.90 |
| M18 | 2.50 | 15.50 | 1.50 | - | 9/16"-12 | 12.20 | 1/2"-20 | 11.50 |
| M20 | 2.50 | 17.50 | 1.50 | - | 5/8"-11 | 13.50 | 9/16"-18 | 12.90 |
| M22 | 2.50 | 19.50 | 2.00 | - | 3/4"-10 | 16.50 | 5/8"-18 | 14.50 |
| M24 | 3.00 | 21.00 | 2.00 | 1.50 | 7/8"-9 | 19.50 | 3/4"-16 | 17.50 |
| M27 | 3.00 | 24.00 | 2.00 | 1.50 | 1"-8 | 22.25 | 7/8"-14 | 20.25 |
| M30 | 3.50 | 26.50 | 2.00 | - | 1 1/8"-7 | 25.00 | 1"-12 | 23.25 |
| M33 | 3.50 | 29.50 | 2.00 | 1.50 | 1 1/4"-7 | 28.25 | 1 1/8"-12 | 26.50 |
| M36 | 4.00 | 32.00 | - | - | 1 3/8"-6 | 30.75 | 1 1/4"-12 | 29.50 |
| M42 | 4.50 | 37.50 | - | - | 1 1/2"-6 | 34.00 | 1 3/8"-12 | 32.50 |
| M48 | 5.00 | 43.00 | - | - | 1 3/4"-5 | 39.50 | 1 1/2"-12 | 36.00 |
| - | - | - | - | - | 2"-4.5 | 45.00 | - | - |
6. Qhov txawv ntawm Coarse Pitch Threads thiab Fine Pitch Threads
Txhais lus ntawm ntxhib suab xov: Rau ib tug taag nominal txoj kab uas hla, ib tug ntxhib suab xov adopts lub siab tshaj plaws tso cai suab suab. Xov nrog me me nyob rau hauv tib lub nominal txoj kab uas hla yog txhais raws li zoo suab threads.
Piv txwv li: Lub nominal txoj kab uas hla M12 txhawb pitches ntawm 1.75 hli, 1.5 hli thiab 1.25 hli. M12 × 1.75 yog cov ntxhib suab xov, uas tus nqi suab tuaj yeem raug tshem tawm thaum kos npe. M12 × 1.5 thiab M12 × 1.25 yog cov xov xov zoo, uas yuav tsum tau cim tag nrho nrog suab. Tag nrho cov cai saum toj no siv rau cov metric dav dav.
Qhov zoo ntawm cov xov zoo zoo: Lub kaum sab xis me me ua rau tus kheej muaj zog- xauv thiab tiv thaiv-loosing muaj peev xwm, haum rau nyias - phab ntsa qhov chaw, precision kho thiab vibration- ua haujlwm yooj yim. Disadvantage: Dav hlau profile ua rau qis shear zog piv nrog ntxhib pitch threads. Coarse pitch threads feature universal compatibility, yooj yim machining thiab disassembly, ua rau lawv thawj xaiv rau feem ntau cov khoom siv.
