Hunhu Zvinodiwa zveDIN 6914 Bolts neDIN 6915 Nuts

Nhanganyaya

TheDIN6914 boltuye DIN6915 nut musanganiswa inomiririra yakakwirira-yakasimba yekusimbisa sisitimu inoshandiswa zvakanyanya mukugadzirwa kweinjiniya, kunyanya mukuvaka simbi. Iyi pairing yakanyatso kugadzirirwa preloaded zvimiro zvekubatanidza uko yakakwirira clamping mauto uye yakavimbika kuita pasi pesimba rekutakura kunodiwa. Zvinodiwa zvemhando yezvikamu izvi zvinotsanangurwa zvine hudzamu neGerman Institute for Standardization (DIN) zviyero uye zvinowirirana zvepasirese zvinongedzo kuti ive nechokwadi chekuchengetedza, kusimba, uye kuita mukukosha kwekushandisa.

Zvinhu Zvinodiwa

Bolt Material (DIN 6914)

DIN 6914 yakakwirira-yakasimba mabhaudhi ezvimiro anofanirwa kugadzirwa kubva kusimbi inosangana neyakaomesesa zvinhu zvinodiwa zvivakwa:
-Simbi giredhi: Kazhinji gumi.
- Kemikari yakagadzirwa: Inodzorwa muzana yecarbon (0.20-0.55%), manganese (0.40-1.70%), phosphorus (max 0.025%), uye sulfur (max 0.025%)
- Kurapwa kwekupisa: Inofanirwa kudzima uye kudzikisira maitiro kuti uwane inodiwa michina zvivakwa
-Kuyedzwa kwezvinhu: Batch kuyedzwa kunodiwa kuomarara, kusimba kusimba, uye kukanganisa kuramba

Nut Material (DIN6915)

KufananidzaDIN6915 nzunguvane zvinhu zvinopindirana:
-Simbi giredhi: Kazhinji giredhi 10 zvinoenderana neISO 898-2, inoenderana nekirasi yesimba rebhoti
- Kuomarara zvinodiwa: 272-353 HV30 kuve nechokwadi chekugovera kwakaringana mutoro pasina deformation
- Kugarisana: Inofanirwa kuve yakaenzana kana yakakwirira tembiricha kuramba pane iyo bolt zvinhu

Dimensional Tolerances

Bolt Dimensions (DIN 6914)

- Kushivirira kwedhayamita: Shank dhayamita inofanirwa kuchengetedza h12 kushivirira kweM12-M24 mabhaudhi uye h13 yemadhayamita akakura.
- Kureba kushivirira: ± 1.5 mm kureba ≤200 mm, ± 2.0 mm kureba> 200 mm
- Thread zvinodiwa: Metric coarse tambo zvinoenderana ne ISO 898-1 ine 6g kushivirira kirasi
- Zviyero zvemusoro: Hexagon musoro wakafara pamafurati unofanirwa kuenderana neISO 4014 ine kushivirira kirasi A.

Nut Dimensions (DIN 6915)

- Hurefu hunodiwa: Hurefu hudiki hwe 0.8d (apo d ndiyo dhayamita yezita)
- Upamhi mumafurati: Inofanirwa kuenderana neISO 4032 yehex nzungu ine kushivirira kirasi A
- Thread fit: Yemukati tambo inofanira kunge iri 6H kushivirira kirasi pa ISO 965-1
- Chamfer angle: 15-30 ° pazviso zvese zvinotakura

Mechanical Properties

Bolt Mechanical Performance

-Kusimba simba: Minimum 1000 MPa (ye10.9 giredhi)
-Goho resimba: Minimum 900 MPa (ye10.9 giredhi)
- Elongation panguva yekuzorora: Minimum 9%
-Impact simba: Minimum 27 J at -20°C (yehukuru ≥M16)
- Kuoma: 32-39 HRC (Rockwell C chiyero)

Nut Mechanical Performance

- Humbowo hwekuremerwa kushushikana: Inofanirwa kumirisana ne120% yebhaudhi ishoma tensile simba
- Ductility: Haifanirwe kutsemuka kana yawedzerwa ne mandrel kusvika 120% yemazita edhayamita
- Kuoma: Inofanirwa kunge iri mukati meiyo yakatarwa kudzivirira galling panguva yekuomesa

Surface Kurapa uye Corrosion Dziviriro

- Bolt pamusoro: Kazhinji inopisa-dip galvanized (zvishoma 50μm coating) kana mechanic zinc plated (5-15μm) ine chromate passivation
- Nut pamusoro: Inofanirwa kunge iine inowirirana coating system kudzivirira bimetallic corrosion
-Kuzora: Kazhinji pre-kuzorwa newax-based kana polymer coatings kuti iwane anowirirana friction coefficients.
- ** Hydrogen embrittlement **: Post-plating kubheka inodiwa kune yakakwirira-simba mabhaudhi kusunungura hydrogen

Zvinodiwa Zvekushanda

Kuita kweGungano

- Fruction coefficients: Inofanirwa kuenderana nemhando dzakatarwa (kazhinji μ=0.10-0.18 yezvibatanidza zvakatakurwa)
- Preload kurongeka: Inofanirwa kuwana zvishoma 70% yegoho resimba mune inodzorwa yekusimbisa maitiro
-Nut kutenderera huwandu: Inofanirwa kubvumidza kusimba kwakazara pasina kubviswa shinda

Kugarisana Zvinodiwa

- Thread kubatikana: Miniminimum kubatikana kureba kwe0.8d kune yakazara simba
- Kugoverwa kwemutoro: Kugadzira Nut kunofanirwa kudzivirira kusaenzana kwekushushikana kwekushushikana
- Kuramba tembiricha: Inofanirwa kuchengetedza zvivakwa mukati meyakatsanangurwa tembiricha renji (-20 ° C kusvika +150 ° C kazhinji)

Kuedza uye Kudzora Kwemhando

Mandatory Miedzo yeBolts

1. Dimensional inspection: 100% verification yezviyero zvakakosha
2. Mechanical kuyedzwa: Sample yekuyedza simba rekusimba, goho poindi, uye kurebesa
3. Kuomarara kwekuedza: Rockwell kana Vickers kuoma pamasampuli
4. Impact test: Charpy V-notch miedzo yemadhayamita makuru
5. Surface kuongorora: Coating ukobvu uye adhesion bvunzo

Mandatory Miedzo yeHex Nuts

1. Kuedzwa kwehumbowo: Nzungu dzemuenzaniso dzakaiswa pasi pekurema
2. Kuomarara kuyedzwa: Kuona kwakaringana simba rinoenderana
3. Thread gauge inspection: 100% verification neGO/NOGO geji
4. Decarburization check: Maximum 0.05mm yakadzika inobvumirwa