Ndave ndichiita michina kwemakore akawanda, uye ndakagadzirisa zvakasiyana-siyanamachining zvikamu, kushandura zvikamuuyemilling partskuburikidza neCNC muchina maturusi uye nemazvo emidziyo. Pane nguva dzose chikamu chimwe chakakosha, uye ndicho screw.
Magiredhi ekuita emabhaudhi ekubatanidza chimiro chesimbi akakamurwa kuita anopfuura gumi magiredhi akadai se 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, pakati pawo mabhaudhi egiredhi 8.8 uye pamusoro anogadzirwa neakaderera- kabhoni alloy simbi kana yepakati-kabhoni simbi uye yakagadziriswa kupisa (kudzima, kupisa), inowanzozivikanwa. semabhoti ane simba guru, uye mamwe ose anowanzonzi mabhoti akajairwa. Iyo bolt performance giredhi giredhi ine zvikamu zviviri zvenhamba, izvo zvakateerana zvinomiririra iyo inonzi tensile simba kukosha uye goho reshiyo yesimba reiyo bolt zvinhu. Semuyenzaniso:
Zvinoreva mabhoti ane performance level 4.6 ndeiyi:
Iyo yezita rekusimba simba reiyo bolt zvinhu inosvika 400MPa;
Chiyero chegoho chezvinyorwa zvebhoti ndeye 0.6;
Iko kusimba kwegoho rezita reiyo bolt material inosvika 400 × 0.6 = 240MPa level.
Performance giredhi 10.9 yakakwirira-simba mabhaudhi, mushure mekupisa kurapwa, inogona kusvika:
Iyo yezita rekusimba simba reiyo bolt zvinhu inosvika 1000MPa;
Chiyero chegoho chezvinyorwa zvebhoti ndeye 0.9;
Iko simba rekuita goho reiyo bolt zvinhu rinosvika 1000 × 0.9 = 900MPa level.
Zvinorehwa negiredhi rekuita bhoti chiyero chepasi rose. Mabhoti egiredhi rekuita rimwe chete ane maitiro akafanana zvisinei nemusiyano wezvinhu zvawo uye mabviro. Chete giredhi rekuita rinogona kusarudzwa pakugadzira.
Iwo anonzi 8.8 uye 10.9 simba mamakisi zvinoreva kuti shear stress mamakisi emabhaudhi i8.8GPa 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 iri, X*100*(Y/10)=kusimba kwegoho rebhaudhi iri (nekuti maererano nerabel: goho simba/tensile simba =Y/ 10)
Zvakadai segiredhi 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.
chiyero
Panyika nhasi kune marudzi maviri ekuyera mayuniti ekuyera kureba, imwe ndiyo metric system, uye zviyero zvekuyera mamita (m), masendimita (cm), mamirimita (mm), zvichingodaro, ayo anoshandiswa zvakanyanya kuSoutheast Asia. dzakadai seEurope, nyika yangu, neJapan, uye imwe yacho ndiyo metric system. Rudzi urwu ndirwo hurongwa hwehumambo, uye chiyero chekuyera chinonyanya masendimita, iyo yakaenzana nehurongwa hwekare munyika yangu, uye inoshandiswa zvakanyanya muUnited States, United Kingdom nedzimwe nyika dzeEurope neAmerica.
Metric kuyerwa: (decimal system) 1m = 100 cm = 1000 mm
Inch kuyerwa: (octal system) 1 inch = 8 inches 1 inch = 25.4 mm 3/8 × 25.4 = 9.52
1/4 yezvinotevera zvigadzirwa zvinoshandisa manhamba kumiririra madhayamita avo ekudaidza, akadai se: 4#, 5#, 6#, 7#, 8#, 10#, 12#
thread
Tambo chiumbwa chine mauniform helical projections pachikamu chekunze kwakasimba kana mukati. Zvinoenderana nehunhu hwayo uye kushandiswa kwayo, inogona kukamurwa muzvikamu zvitatu:
Ordinary thread: Zino shape is triangular, rinoshandiswa kubatanidza kana kusunga nhengo. Shinda dzenguva dzose dzakakamurwa kuita shinda dzakakora uye dzakatsetseka zvichienderana nenamo, uye kusimba kwekubatanidza kweshinda dzakatsetseka kwakakwira.
Transmission thread: Zino chimiro chinosanganisira trapezoidal, rectangular, saw-shaped uye triangular.
Chisimbiso shinda: inoshandiswa kuvhara kubatanidza, kunyanya pombi shinda, tapered tambo uye tapered pombi shinda.
Yakakamurwa nechimiro:
Thread fit grade
Thread fit ndiyo dhigirii rekuregedzera kana kusimba pakati peshinda dzakarukwa, uye dhigirii refit ndiyo yakatemerwa musanganiswa wekutsauka uye kushivirira kunobata shinda dzemukati nekunze.
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 yakakwira nhamba yegiredhi, iyo inotowedzera kukwana. Mutambo yeinch, kutsauka kunongotaura mamakisi 1A ne2A, kutsauka kwegiredhi 3A i zero, uye kutsauka kwegiredhi regiredhi 1A negiredhi 2A zvakaenzana. Iyo yakakura nhamba yemagiredhi, idiki iyo kushivirira.
Makirasi 1A uye 1B, makirasi akasununguka ekushivirira, ayo akakodzera kushivirira kunoenderana nemukati nekunze shinda.
Makirasi 2A uye 2B ndiwo anonyanya kufarirwa makirasi ekushivirira akatsanangurwa kune emperial akatevedzana mechanical fasteners.
Kirasi 3A ne3B, yakakwenenzverwa kuti iite yakanyatsokodzera, inokodzera zvibatiso zvine kushivirira kwakasimba, uye inoshandiswa mumagadzirirwo akakosha.
Kune shinda dzekunze, mamakisi 1A ne2A ane kushivirira kwakakodzera, giredhi 3A harina. Kushivirira kweKirasi 1A kwakakura 50% kupfuura kushivirira kweKirasi 2A, 75% hombe pane kushivirira kweKirasi 3A, uye Kushivirira kweKirasi 2B kwakakura 30% kupfuura kushivirira kweKirasi 2A yeshinda dzemukati. Kirasi 1B yakakura ne50% kupfuura Kirasi 2B uye 75% yakakura kupfuura Kirasi 3B.
2. Kune metric threads, kune matatu tambo magiredhi kune ekunze shinda: 4h, 6h uye 6g, uye matatu tambo mamakisi emukati meshinda: 5H, 6H, uye 7H. (Chiyero cheJapan chiyero chechokwadi cheshinda chakakamurwa kuita mamakisi matatu: I, II, uye III, uye kazhinji igiredhi II.) Mutambo yemetric, kutsauka kwekutanga kweH nah i zero. Kutsauka kwekutanga kweG kwakanaka, uye kutsauswa kwekutanga kwe e, f uye g kunegetsi.
H ndiyo inowanzoshandiswa kushivirira nzvimbo yetambo dzemukati, uye haiwanzo shandiswa seyepamusoro pekuvhara, kana yakatetepa phosphating layer inoshandiswa. Iko kutsauka kweiyo G chinzvimbo kunoshandiswa kune akakosha zviitiko, senge akakora machira, uye haawanzo kushandiswa.
g inowanzo shandiswa kurongedza jira rakatetepa re6-9um. Kana chigadzirwa kudhirowa kuchida bhaudhi ye6h, shinda isati yaiswa inotora nzvimbo yekushivirira ye6g.
Iyo shinda inokwana inonyatso kusanganiswa kuita H/g, H/h kana G/h. Kune tambo dzezvakanatswa fasteners senge mabhaudhi nenzungu, muyero unokurudzira kukwana kwe6H/6g.
3. Thread marking
Main geometric parameters yekuzvirovera uye yekuzvirovera tambo
1. Kukura kwedhayamita/chidhayamita chezino chekunze (d1): Idhayamita yehumburumbira rekufungidzira panopindirana tambo dzeshinda. Iyo dhayamita hombe yeshinda inomiririra dhayamita rezita resaizi yeshinda.
2. Diki dhayamita/mudzi dhayamita (d2): Ndiko dhayamita rehumburumbira rekufungidzira panopindirana pasi peshinda.
3. Chinhambwe chezino (p): Inhambwe yeaxial pakati pemazino ari padyo inoenderana nemapoinzi maviri ari pakati pemeridian. Muhutongi hwehumambo, kureba kwezino kunoratidzwa nehuwandu hwemazino pa inch (25.4mm).
Iri rinotevera rondedzero yezvakajairwa zvemazino pitch (metric system) uye nhamba yemeno (imperial system)
1) Metric anozvirova mazino:
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) Imperial self-tapping mazino:
Zvinotsanangurwa: 4#, 5#, 6#, 7#, 8#, 10#, 12#, 14#
Nhamba yemazino: AB mazino 24, 20, 20, 19, 18, 16, 14, 14
Mazino 24, 20, 18, 16, 15, 12, 11, 10
Nguva yekutumira: Feb-02-2023