Muchina uyu wanga uchishanda kwehupenyu hwese, izvo 4.4 uye 8.8 pabhaudhi zvinorevei?

Mushure mekushanda semuchina kwemakore akawanda kudaro, haufanirwe kuziva zvinorehwa nemavara ari pamakona, handiti?

Magiredhi ekuita emabhaudhi ekubatanidza simbi chimiro akakamurwa kuita anopfuura gumi mamakiredhi, akadai 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc. Pakati pavo, giredhi 8.8 uye pamusoro mabhaudhi anogadzirwa. yepasi-kabhoni alloy kana yepakati-kabhoni simbi uye inogadziriswa kupisa (kudzima, kupisa), inowanzozivikanwa se mabhaudhi akasimba; mamwe ose anozivikanwa zvikuru semabhaudhi akajairika. Iyo bhaudhi performance giredhi label ine nhamba mbiri, inomiririra yainzi tensile simba kukosha uye goho reshiyo yebhoti zvinhu, zvakateerana.
Mabhoti emidziyo kirasi 4.6 anoreva:
Iyo yezita rekusimba simba reiyo bolt zvinhu inosvika 400MPa;
Chiyero chegoho chezvinyorwa zvebhoti ndeye 0.6;
Simba rekuita goho remabhaudhi zvinhu 400×0.6=240MPa.
Performance level 10.9 yakakwirira-simba mabhaudhi, mushure mekupisa kurapwa, inogona kuwana:
Iyo yezita rekusimba simba reiyo bolt zvinhu inosvika 1000MPa;
Chiyero chegoho chezvinyorwa zvebhoti ndeye 0.9;
Simba rekuita goho remabhaudhi zvinhu 1000×0.9=900MPa.

Zvinorehwa negiredhi rekuita bhoti chiyero chepasi rose. Pasinei nekusiyana kwezvinhu uye kwakabva, mabhoti egiredhi rekuita rimwe chete ane maitiro akafanana, uye chete giredhi rekuita rinogona kusarudzwa mukugadzira.
Iyo inonzi 8.8 uye 10.9 simba mamakisi zvinoreva kuti shear stress resistance yebolt ndeye 8.8GPa uye 10.9GPa.
8.8 Nominal tensile simba 800N/MM2 Nominal goho simba 640N/MM2
General mabhaudhi anoshandisa "XY" kuratidza kusimba, X*100=tensile simba rebhaudhi iri, X*100*(Y/10)=kusimba kwegoho rebhaudhi iri (nokuti maererano nemirairo: goho simba/tensile simba =Y /10)
Semuenzaniso, mugiredhi 4.8, kusimba kwebhaudhi iri 400MPa; simba regoho i400*8/10=320MPa.
Imwe: mabhaudhi esimbi asina tsvina anowanzo kunyorwa seA4-70 uye A2-70; revo yacho inotsanangurwa neimwe nzira.
chiyero
Kune zvikamu zviviri zvepakati zvekuyera kureba munyika nhasi: imwe ndeye metric system, uye unit yechiyero mita (m), masendimita (cm), millimeters (mm), zvichingodaro. The mhando ndiyo imperial system, uye the Chiyero chekuyera chinonyanya kuita inches, iyo yakaenzana nemusika inch weiyo yekare system munyika yangu. Inoshandiswa zvakanyanya muUnited States, Britain, nedzimwe nyika dzeEurope neAmerica.
Metric kuyerwa: (decimal) 1m = 100 cm = 1000 mm
Chiyero cheumambo: (8 system) 1 inch = 8 cents 1 inch = 25.4 mm 3/8 × 25.4 = 9.52
Zvigadzirwa zviri pazasi 1/4 zvinoshandisa serial nhamba kuratidza dhayamita yavo yekufona, senge: 4#, shanu #, nhanhatu #, nomwe #, sere #, gumi #, 12#

thread
Tambo chiumbwa chine mauniform helical protrusions pamuchinjikwa-chikamu chekunze kwakasimba kana mukati. Zvinoenderana nehunhu hwayo uye kushandiswa kwayo, inogona kukamurwa muzvikamu zvitatu:
Tambo yakajairika: Chimiro chezino chine mativi matatu uye chinoshandiswa kubatanidza kana kusunga nhengo. Shinda dzakajairwa dzakakamurwa kuita marudzi maviri: shinda yakaoma uye shinda yakanaka, zvichienderana nenamo, uye kusimba kwekubatanidza kweshinda yakanaka yakakwirira.
Transmission thread: Kune trapezoidal, rectangular, saw-shape,d, uye triangular mazino maumbirwo.
Shinda yekuisa chisimbiso: inoshandiswa kuvhara kubatanidza, kunyanya pombi shinda, tapered shinda, uye tapered pombi shinda.
Ronga nechimiro:

Thread fit class

Iyo shinda inokwana saizi yakasununguka kana yakasimba pakati peshinda dzakarukwa, uye nhanho yekukodzera ndiyo yakatsanangurwa musanganiswa wekutsauka uye kushivirira kunobata shinda dzemukati nekunze.
1. Patambo dzakabatana inch, kune tambo nhatu dzeshinda dzekunze: 1A, 2A, uye 3A, uye nhatu dzeshinda dzemukati: 1B, 2B, uye 3B, ese ari clearance fit. Iyo yakakwirira nhamba yezviyero, iyo inowedzera kusimba. Mumainch threads, kutsauka kunongotaurwa kumagiredhi 1A ne2A, kutsauka kwegiredhi 3A i zero, uye kutsauka kwegiredhi remagiredhi 1A ne2A akaenzana. Iyo yakakura nhamba yemazinga, idiki iyo kushivirira.
Makirasi 1A uye 1B, makirasi akasununguka ekushivirira, ayo akakodzera kushivirira kunoenderana nemukati nekunze shinda.
Magiredhi 2A uye 2B ndiwo anonyanya kuzivikanwa magiredhi ekushivirira magiredhi akatsanangurwa inch-series mechanical fasteners.
Magiredhi 3A ne3B, akarukwa pamwe chete kuti aite yakanyatsokodzera, akakodzera zvisungo zvekushivirira uye anoshandiswa mukuchengetedza-akakosha magadzirirwo.
Kune tambo dzekunze, mamakisi 1A uye 2A ane kushivirira kwakakodzera; grade 3A haina. Iyo 1A kushivirira ndeye 50% yakakura kupfuura iyo 2A kushivirira uye 75% yakakura kupfuura iyo 3A kushivirira. Kune shinda yemukati, iyo 2B kushivirira ndeye 30% yakakura kupfuura iyo 2A kushivirira. Kirasi 1B yakakura ne50% kupfuura Kirasi 2B uye 75% yakakura kupfuura Kirasi 3 B.
2. Metric threads: iva nemagiredhi matatu eshinda dzekunze: 4h, nhanhatu h, uye 6g, uye nhatu dzeshinda dzemukati: 5H, 6H, uye 7H. (The Japanese standard thread accuracy giredhi yakakamurwa kuita mamakisi matatu: I, II, uye III, kazhinji giredhi II.) Mutambo yemetric, kutsauka kwakakosha kweH nah i zero. Kutsauka kwekutanga kweG ndiko kwakanaka, uye kutsauswa kwekutanga kwe e, f, uye g kunegetsi.
H inzvimbo yakajairwa yekushivirira nzvimbo yetambo dzemukati uye haiwanzo shandiswa seyepamusoro pekuvhara kana phosphating layer inoshandiswa. Iko kutsauka kwekutanga kwenzvimbo yeG inoshandiswa kune zviitiko zvakakosha, senge kukora, uko kusingawanzo kushandiswa.
g inowanzoshandiswa kupfekedza jira rakaonda re6-9um. Semuenzaniso, kudhirowa kwechigadzirwa kunoda matanhatu h bhaudhi, uye shinda isati yaputirwa inoshandisa 6g yekushivirira zone.
Iyo shinda inokwana inonyatso kusanganiswa kuita H/g, H/h, kana G/h. Kune dzakanatswa fastener tambo senge mabhaudhi nenzungu, mwero unokurudzira kukwana kwe6H/6g.
3. Thread marking
Main geometric parameters yekuzvirovera uye yekuzvirovera tambo
1. Kukura kwedhayamita / zino rekunze dhayamita (d1): Ndiyo yekufungidzira cylindrical dhayamita yekusangana kwetambo crests. Iyo dhayamita yekutanga yeshinda inomiririra saizi yeshinda yezita.
2. Diki dhayamita/mudzi dhayamita (d2): Kuwanda kwehumburumbira rekufungidzira panopindirana mudzi weshinda.
3. Chinhambwe chezino (p): nhambwe yeaxial pakati pemazino ari pedyo inoenderana nemapoinzi maviri pameridian yepakati. Muhutongi hwehumambo, kukwirira kunoratidzwa nehuwandu hwemazino pa inch (25.4mm).
Izvi zvinotevera zvinorongeka zvakajairwa zvepitch (metric) uye nhamba yemeno (imperial)
1) Metric self-tapping:
Zvinyorwa: S T1.5, S T1.9, S T2.2, S T2.6, S T2.9, S T3.3, S T3.5, S T3.9, S T4.2, S T4. 8, S T5.5, S T6.3, S T8.0, S T9.5
Kuwedzera: 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:
Zvinotsanangurwa: 4#, 5#, 6#, 7#, 8#, 10#, 12#, 14#
Nhamba yemazino: AB mazino 24, 20, 20, 19, 18, 16, 14, 14
Zino 24, 20, 18, 16, 15, 12, 11, 10