Magiredhi ekuita emabhaudhi ekubatanidza simbi chimiro akakamurwa kuita anopfuura gumi magiredhi akadai 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc. Pakati pavo, mabhaudhi egiredhi 8.8 uye pamusoro anogadzirwa. yelow-carbon alloysimbi kana yepakati-kabhoni simbi uye inodziya-yakagadziriswa (kudzima, kupisa), inowanzozivikanwa seyakakwirira-simba mabhaudhi, mamwe anowanzozivikanwa seakajairika mabhaudhi.
Iyo bolt performance giredhi label ine zvikamu zviviri zvenhamba, izvo zvinomiririra zita rekuti tensile simba kukosha uye goho reshiyo yezvinhu zvebhoti zvichiteerana. Eg:
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. Mabhoti egiredhi rimwechete rekuita, zvisinei nekusiyana kwezvinhu uye kwakabva, 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 simba, X * 100 = tensile simba rebhaudhi iyi, X * 100 * (Y / 10) = simba rekubereka rebhaudhi iyi (nokuti maererano nemirairo: goho simba / simba rekusimba = Y /10)
Semuenzaniso, giredhi 4.8, kusimba kwebhaudhi iri: 400MPa; simba regoho ndere: 400*8/10=320MPa.
Imwe: mabhaudhi esimbi asina simbi anowanzo kunyorwa seA4-70, A2-70, zvinoreva zvinotsanangurwa neimwe nzira.
Kuyera
Kune zvikamu zviviri zvikuru zvekuyera kureba munyika nhasi, chimwe chiyeredzo chemetric, uye chikamu chekuyera mamita (m), masendimita (cm), millimeters (mm), nezvimwewo. The mhuka ndiyo imperial system, uye chiyero chekuyera chinonyanya kuenzana nemasendimita emusika wegadziriro yekare munyika yangu, uye 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#, 5#, 6#, 7#, 8#, 10#, 12#.
Screw 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 mhando mbiri: shinda yakakora uye shinda yakanaka zvichienderana nenamo, uye kusimba kwekubatanidza kweshinda yakatsetseka kwakakwira.
Transmission thread: Kune trapezoidal, rectangular, saw-shaped uye triangular mazino maumbirwo.
Chisimbiso shinda: inoshandiswa kuvhara kubatanidza, kunyanya pombi shinda, tapered tambo uye tapered pombi shinda.
Ronga nechimiro:
Thread fit class
The thread fit is the loose or tight size pakati pescrewed threads, uye nhanho yekukodzera isanganiswa yakatsanangurwa yekutsauka uye kushivirira kunoshanda pane yemukati nekunze shinda.
1. Kune tambo dzakabatana inch, kune magiredhi matatu eshinda dzekunze: 1A, 2A ne3A, uye mamakisi matatu eshinda 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 zvekushingirira uye anoshandiswa mukuchengetedza-akakosha magadzirirwo.
Kune shinda dzekunze, mamakisi 1A ne2A ane kushivirira kwakakodzera, giredhi 3A harina. 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 i50% yakakura kupfuura kirasi 2B uye 75% yakakura kupfuura kirasi 3B.
2. Metric shinda, kune matatu tambo mamakisi ekunze: 4h, 6h uye 6g, uye matatu tambo mamakisi emukati shinda: 5H, 6H, 7H. (The Japanese standard thread accuracy giredhi yakakamurwa kuita mamakisi matatu: I, II, uye III, uye kazhinji igiredhi II.) Mutambo yemetric, kutsauka kwekutanga kweH nah i zero. Kutsauswa kweG ndiko kunaka, uye kutsauswa kwekutanga kwee, f, uye g kunegetsi.
H inzvimbo yakajairwa yekushivirira nzvimbo yetambo dzemukati, uye haiwanzo shandiswa seyepamusoro pekuvhara, kana yakatetepa phosphating layer inoshandiswa. Iko kutsauka kwekutanga kweG chinzvimbo kunoshandiswa kune akakosha zviitiko, senge kukora coating, iyo isingawanzo kushandiswa.
g inowanzoshandiswa kupfekedza jira rakaonda re6-9um. Semuenzaniso, kudhirowa kwechigadzirwa kunoda bhaudhi ye6h, 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 huru yeshinda inomiririra dhayamita rezita resaizi yeshinda.
2. Diki dhayamita/mudzi dhayamita (d2): Ihupamhi hwehumburumbira 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
Nguva yekutumira: Sep-12-2022