Kev xav tau zoo rau DIN 6914 Bolts nrog DIN 6915 Ceev

Taw qhia

CovDIN6914 ntsia liaj qhov roojthiab DIN6915 txiv ntseej ua ke sawv cev rau lub zog muaj zog fastening system dav siv hauv kev siv engineering, tshwj xeeb hauv kev tsim steel. Qhov kev sib koom ua ke no tshwj xeeb yog tsim los rau kev sib txuas ntawm cov qauv ua ntej uas muaj zog clamping siab thiab txhim khu kev qha nyob rau hauv dynamic loading yuav tsum tau. Cov kev cai zoo rau cov khoom no yog nruj me ntsis txhais los ntawm German lub koom haum rau Standardization (DIN) cov qauv thiab ntxiv thoob ntiaj teb specifications kom muaj kev ruaj ntseg, durability, thiab kev ua tau zoo nyob rau hauv cov ntaub ntawv tseem ceeb.

Cov ntaub ntawv xav tau

Bolt Khoom (DIN 6914)

DIN 6914 high-strength structural bolts yuav tsum tau tsim los ntawm cov hlau uas ua tau raws li cov khoom siv nruj nruj:
- Qib steel: Feem ntau 10.9 raws li ISO 898-1, qhia qhov muaj zog tensile yam tsawg kawg nkaus ntawm 1000 MPa thiab yield zog ntawm 900 MPa
- Tshuaj muaj pes tsawg leeg: Tswj feem pua ​​​​ntawm carbon (0.20-0.55%), manganese (0.40-1.70%), phosphorus (max 0.025%), thiab sulfur (max 0.025%)
- Kev kho cua sov: Yuav tsum tau quenching thiab tempering txheej txheem kom ua tiav cov khoom siv kho tshuab
- Cov khoom siv kuaj: Batch xeem yuav tsum tau hardness, tensile zog, thiab tej yam kuj

Txiv ntseej khoom (DIN6915)

Qhov sib txuamDIN6915 txiv ntseejmuaj complementary khoom specifications:
- Qib Steel: Feem ntau qib 10 raws li ISO 898-2, sib piv cov bolt lub zog chav kawm
- Cov kev xav tau Hardness: 272-353 HV30 kom ntseeg tau tias cov khoom thauj khoom tsis muaj deformation
- Compatibility: Yuav tsum muaj qhov sib npaug lossis siab dua qhov kub tsis kam tshaj cov khoom siv ntsia liaj qhov rooj

Dimensional Tolerances

Bolt Dimensions (DIN 6914)

- Txoj kab uas hla: txoj kab uas hla yuav tsum tuav h12 kam rau M12-M24 bolts thiab h13 rau qhov loj dua
- Ntev ntev: ± 1.5 hli rau qhov ntev ≤200 hli, ± 2.0 hli rau qhov ntev> 200 hli
- Xov xov yuav tsum: Metric coarse xov raws li ISO 898-1 nrog 6g kam rau ua chav kawm
- Lub taub hau qhov ntev: Hexagon taub hau dav thoob plaws cov tiaj tiaj yuav tsum ua raws li ISO 4014 nrog rau chav kawm A

Txiv ntseej Dimensions (DIN 6915)

- Qhov siab xav tau: qhov siab tsawg kawg nkaus ntawm 0.8d (qhov twg d yog qhov nominal txoj kab uas hla)
- Dav thoob plaws flats: Yuav tsum ua raws li ISO 4032 rau hex txiv ntseej nrog rau chav kawm A
- Xov haum: Internal xov yuav tsum yog 6H kam rau ua raws li ISO 965-1
- Lub kaum sab xis: 15-30 ° ntawm ob lub ntsej muag bearing

Mechanical Properties

Bolt Mechanical Performance

- Tensile zog: Tsawg kawg 1000 MPa (rau qib 10.9)
- Yield zog: Yam tsawg kawg nkaus 900 MPa (rau qib 10.9)
- Elongation thaum so: Tsawg kawg 9%
- Lub zog cuam tshuam: Tsawg kawg 27 J ntawm -20 ° C (rau qhov ntau thiab tsawg ≥M16)
- Hardness: 32-39 HRC (Rockwell C nplai)

Nut Mechanical Performance

- Pov thawj load kev nyuaj siab: yuav tsum tiv taus 120% ntawm bolt qhov tsawg kawg nkaus tensile lub zog
- Ductility: Yuav tsum tsis txhob tawg thaum nthuav nrog mandrel mus rau 120% ntawm nominal txoj kab uas hla
- Hardness: Yuav tsum nyob rau hauv ntau qhov tshwj xeeb los tiv thaiv galling thaum zawm

Kev kho deg thiab kev tiv thaiv corrosion

- Bolt nto: Feem ntau kub-dip galvanized (tsawg kawg 50μm txheej) lossis mechanically zinc plated (5-15μm) nrog chromate passivation
- Txiv ntseej saum npoo: Yuav tsum muaj cov txheej txheem sib xyaw ua ke kom tiv thaiv bimetallic corrosion
- Lubrication: Feem ntau pre-lubricated nrog wax-based lossis polymer coatings kom ua tau raws li kev sib txhuam coefficient
- **Hydrogen embrittlement **: Tom qab plating ci yuav tsum tau rau siab zog bolts los txo hydrogen

Cov Kev Xav Tau

Kev ua haujlwm sib dhos

- Kev sib txhuam coefficients: Yuav tsum ua raws li qhov tseem ceeb (feem ntau μ = 0.10-0.18 rau kev sib txuas ua ntej)
- Preload raug: Yuav tsum ua kom tiav yam tsawg kawg 70% ntawm lub zog tawm los hauv cov txheej txheem tswj nruj
- Txiv ntseej muaj peev xwm tig: Yuav tsum tso cai kom nruj tsis muaj xov stripping

Compatibility yuav tsum

- Kev sib koom tes xov: Kev sib koom ua ke tsawg kawg ntawm 0.8d rau tag nrho lub zog
- Load faib: Txiv ntseej tsim yuav tsum tiv thaiv kev ntxhov siab tsis sib xws
- Kub tsis kam: Yuav tsum tswj cov khoom hauv qhov ntsuas kub (-20 ° C txog + 150 ° C feem ntau)

Kev Ntsuas thiab Kev Tswj Xyuas Zoo

Yuav tsum xeem rauBolts

1. Dimensional soj ntsuam: 100% kev txheeb xyuas qhov tseem ceeb
2. Mechanical testing: Sample testing of tensile strength, yield point, thiab elongation
3. Kev kuaj Hardness: Rockwell lossis Vickers hardness ntawm cov qauv
4. Kev sim cuam tshuam: Charpy V-notch tests rau cov kab uas loj dua
5. Kev soj ntsuam saum npoo: txheej thickness thiab adhesion xeem

Yuav tsum xeem rauHex txiv ntoo

1. Pov thawj load kuaj: Sample txiv ntseej raug rau tensile load
2. Kev ntsuam xyuas Hardness: txhawm rau txheeb xyuas qhov sib npaug ntawm lub zog
3. Xov gauge tshuaj xyuas: 100% pov thawj nrog GO / NOGO gauges
4. Decarburization check: Qhov siab tshaj plaws 0.05mm tso cai