Geometric Parameters ntawm Xov
Nkag siab qhov tseem ceeb Geometric Parameters
- Loj Diameter (D lossis d)
Qhov loj txoj kab uas hla yog qhov loj tshaj plaws txoj kab uas hla ntawm cov xov, ntsuas ntawm lub crest rau sab nraud threads thiab nyob rau hauv lub hauv paus rau internal threads. Nws feem ntau txiav txim siab tag nrho qhov loj ntawm lub bolt lossis ntsia hlau. Kev tswj kom raug ntawm qhov ntsuas no ua kom haum qhov tseeb thiab kev sib txuas ruaj khov.
- Qhov me me (D1 lossis d1)
Qhov me me txoj kab uas hla yog qhov tsawg tshaj plaws txoj kab uas hla ntawm cov xov, ntsuas ntawm lub hauv paus rau lwm threads thiab nyob rau hauv lub crest rau internal threads. Nws ncaj qha cuam tshuam lub peev xwm tensile ntawm cov xov. Kev tsim khoom ntawm cov kab me me yog qhov tseem ceeb rau kev ua tiav kev sib koom ua ke ntawm mating threads.
- Pitch Diameter (D2 lossis D2)
Lub pitch txoj kab uas hla nyob nruab nrab ntawm qhov loj thiab me diameters thiab yog qhov twg xov thickness sib npaug qhov chaw ntawm threads. Nws cuam tshuam qhov haum ntawm threads thiab yog ib qho tseem ceeb parameter rau kev ntsuas xov precision. Ua kom lub suab sib raug zoo ua rau muaj kev sib txuas zoo dua.
- Pitch (p) - Metric
Lub suab hais txog qhov axial nrug ntawm cov xov uas nyob ib sab. Nws cuam tshuam kev sib dhos ceev thiab kev sib txuas precision. Cov pitches loj dua pab txhawb kev sib dhos sai dua tab sis tuaj yeem txo tuav lub zog, thaum cov pitches me muab kev sib txuas kom nruj dua, haum rau cov ntawv thov siab.
- Xov Angle (α)
Lub kaum sab xis yog lub kaum sab xis uas tsim los ntawm ob sab ntawm cov xov profile. Cov ces kaum feem ntau suav nrog 60 ° rau metric threads thiab 55 ° rau British Standard Whitworth (BSW) threads. Cov kaum sab xis loj tuaj yeem ua rau muaj kev sib txhuam, txhim khu kev sib txuas ntawm tus kheej, uas yog qhov zoo rau kev sib txuas ruaj khov.
- Lub kaum sab xis (φ)
Lub kaum sab xis yog lub kaum sab xis ntawm lub flank ntawm cov xov thiab ib kab perpendicular mus rau axis. Txawv designs haum rau cov kev xav tau tshwj xeeb:
Daim duab peb sab: Haum rau kev siv dav dav nrog kev txhim khu kev qha tus kheej.
Trapezoidal Threads: Zoo tagnrho rau hnyav load-bearing daim ntaub ntawv xws li tshuab cuab yeej qhia.
Square Threads: Ua tau zoo rau kev xa hluav taws xob vim muaj kev sib txhuam qis.
Sawtooth Xov: Haum rau unidirectional loading scenarios, xws li hauv hydraulic systems.
- Xov Taw Qhia
Txoj Cai Txoj Cai: Feem ntau, nruj thaum tig clockwise.
Sab laug-tes Xov: Siv rau hauv cov ntawv tshwj xeeb uas xav tau los tiv thaiv lub zog, xws li hauv qee yam khoom siv tig.
Common Specifications rau Pitch thiab TPI
Xaiv lub suab tsim nyog lossis TPI yog qhov tseem ceeb rau kev ua haujlwm zoo. Hauv qab no yog qee qhov kev siv ntau zaus:
- Metric Threads (Pitch)
M3: 0.5 hli
M4: 0.7 hli
M5: 0.8 hli
M6: 1.0 hli
M8: 1.25mm (coarse) / 1.0mm (zoo)
M10: 1.5mm (coarse) / 1.25mm (zoo)
M12: 1.75mm (coarse) / 1.5mm (zoo)
M16: 2.0mm (coarse) / 2.0mm (zoo)
M20: 2.5mm (coarse) / 2.0mm (zoo)
- Inch Threads (TPI)
#4-40 UNC/UNF: 40 TPI (UNC), 48 TPI (UNF)
#6-32 UNC/UNF: 32 TPI (UNC), 40 TPI (UNF)
#8-32 UNC/UNF: 32 TPI (UNC), 40 TPI (UNF)
#10-24 UNC/UNF: 24 TPI (UNC), 32 TPI (UNF)
1/4-20 UNC / UNF: 20 TPI (UNC), 28 TPI (UNF)
5/16-18 UNC/UNF: 18 TPI (UNC), 24 TPI (UNF)
3/8-16 UNC/UNF: 16 TPI (UNC), 24 TPI (UNF)
Geometric parameters ntawm threads yog qhov tseem ceeb rau lawv txoj haujlwm thiab kev siv. Los ntawm kev nkag siab txog cov kev txwv no thiab xaiv qhov kev qhia tshwj xeeb, engineers tuaj yeem ua kom ntseeg tau thiab ua tau zoo fastening daws teeb meem raws li cov ntawv thov tshwj xeeb. Txawm hais tias xaiv cov qauv metric lossis imperial, kev sib xyaw kom raug ntawm cov suab thiab TPI ua kom pom kev ua haujlwm tau zoo thiab kev ua haujlwm ntev hauv ntau qhov chaw lag luam.
Ua tsaug rau koj nyeem, yog tias koj xav pom ntau yam uas peb yuav tsum muaj koj tuaj yeem ua raws li cov ntawv txuas hauv qab no!