Mushure memakore akawanda kudaro ekuita muchina, iwe hauzive zvinorehwa nescrew mark, handiti?
Kushanda giredhi yemabhoti ekubatanidza simbi yekugadzira yakakamurwa kuita mamakisi anopfuura gumi, kusanganisira 3.6,4.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9.Mabhaudhi ekirasi 8.8 uye pamusoro anogadzirwa neakadzika kabhoni alloy simbi kana yepakati kabhoni simbi uye kupisa kurapwa (kudzima, kudziya), anowanzo kunzi mabhaudhi emasimba makuru, uye mamwe anowanzo kunzi akajairwa mabhaudhi.Iyo bolt performance giredhi mamaki ine zvikamu zviviri zvenhamba, zvichiteerana zvinomiririra iyo zita rekusimba simba kukosha uye flexion simba reshiyo yebhaudhi zvinhu.semuenzaniso:
Mabhoti ekuita giredhi 4.6, zvinoreva kuti:
Iyo yezita rekusimba simba reiyo bolt zvinhu inosvika 400MPa level;
Iyo flexion simba reshiyo yebhoti zvinhu ndeye 0.6;
Iko kusimba kwegoho rezita reiyo bolt material inosvika 400 × 0.6 = 240MPa level.
Performance giredhi 10.9 yakakwirira simba mabhaudhi, ane zvinhu mushure mekupisa kurapwa, anogona kusvika:
Iyo yezita rekusimba simba reiyo bolt zvinhu inosvika 1000MPa level;
Iyo flexion simba reshiyo yebhoti zvinhu ndeye 0.9;
Iko simba rekuita goho reiyo bolt zvinhu rinosvika 1000 × 0.9 = 900MPa level.
Chirevo chegiredhi rekuita bhoti ndiyo chiyero chepasi rose, iyo yakafanana giredhi rekuita rebhoti, zvisinei nekusiyana kwezvinhu zvayo uye mavambo, kuita kwayo kwakafanana, dhizaini inogona kungosarudza danho rekuita.
Simba mamakisi 8.8 uye 10.9 ndiwo mabhoti shear stress rating ye8.8GPa uye 10.9GPa
8.8 Nominal tensile simba 800 N/MM2 Nominal goho simba 640 N/MM2
General mabhaudhi anoshandiswa ne” X. Y ” inoratidza kusimba, X * 100= kusimba kwebhaudhi iri, X * 100 * (Y / 10) = kusimba kwebhaudhi iri (sezvakanyorwa: goho simba / simba rekusimba =Y / 10)
Kwekirasi 4.8, simba rekusimba rebhoti ndeye 400MPa;simba regoho i400 * 8 / 10=320MPa.
Zvakare: mabhaudhi esimbi asina simbi anowanzo kunyorwa kuti A4-70, A2-70 chitarisiko, chirevo chinotsanangurwa neimwe nzira.
chiyero
Kureba munyika kunonyanya kuve nezvikamu zviviri zvekuyera, imwe ndiyo metric system, chiyero chekuyera kwemamita (m), cm (m) (cm), mm (mm), nezvimwewo, mudunhu, China neJapan uye mamwe maodzanyemba kwakadziva kumabvazuva kweAsia anoshandiswa zvakanyanya, imwe yacho iBritish, chiyero chekuyera kunyanya masendimita (inch), yakaenzana nenzvimbo yeguta rekare, muUnited States, United States nedzimwe nyika dzeEurope neAmerica dzakashandiswa zvakanyanya.
Metric kuyerwa: (10 mex) 1m =100cm=1000 mm
Chiyero cheBritish: (8 r) 1 inch =8 mamaira 1 inch =25.4 mm 3 / 8??×25.4 =9.52
1/4??Zvigadzirwa zvinotevera zvakaverengerwa kuratidza mazita avo mazita, akadai se: 4 #, 5 #, 6 #, 7 #, 8 #, 10 #, 12 #
screw thread
Rwonzi chiumbwa chine uniform spiral convex pachikamu chekunze kana mukati pechinhu chakasimba.Zvinoenderana nehunhu hwayo uye kushandiswa kwayo, inogona kukamurwa muzvikamu zvitatu:
Ordinary thread: zino chimiro istriangleShape, rinoshandiswa kubatanidza kana kusungirira zvikamu.Tambo yakajairika yakakamurwa kuita marudzi maviri emazino akakasharara neshinda yemazino akatsetseka zvichienderana nenamo, uye kusimba kwekubatanidza kweshinda yezino nyoro yakakwirira.
Transmission thread: zino chimiro chine trapezoidal, rectangular, saw uye katatu, nezvimwewo.
Kuisa chisimbiso: inoshandiswa kuvhara kubatanidza, kunyanya pombi tambo, cone thread uye cone tube thread.
Kurongwa nechimiro
Yakagadzirwa negiredhi
Thread fit ndiyo saizi yekuregedzera kana kusimba pakati pescrew thread, uye nhanho yekukodzera ndiyo yakatemerwa musanganiswa wekutsauka uye kushivirira pane zvemukati nekunze shinda.
1. Kune shinda yeBritish yakabatana, kune magiredhi matatu eshinda yekunze: 1A, 2A uye 3A, uye kune magiredhi matatu: 1B, 2B ne3B, ese ari gap anoenderana.Iyo yakakwirira yenhamba yenhanho, ndiko kusimba kwekubatana.Mune shinda dzeBritish, kutsauka kunongoreva mamakisi 1A ne2A, mamakisi 3A izero, uye mamakisi 1A ne2A akaenzana.Iyo yakakura nhamba yemagiredhi, idiki iyo kushivirira.
Kirasi 1A uye 1B, yakasununguka kwazvo kushivirira chiyero, inokodzera kushivirira kwakakodzera kwemukati nekunze shinda.
Kirasi 2A uye 2B ndiwo makirasi akajairika ekushivirira makirasi akatsanangurwa kuBritish akatevedzana emakanika fasteners.
Iyo 3A uye 3B kirasi, iyo inoumba iyo tighfit yeakasimba kushivirira fasteners yekuchengetedza yakakosha dhizaini.
Kune tambo dzekunze, 1A ne2A vane kushivirira kwekubatana uye 3A haina.1A kushivirira i50% yakakura kupfuura 2A kushivirira uye 75% yakakura kupfuura 3A kushivirira.Kune shinda yemukati, 2B kushivirira i30% yakakura kupfuura 2A kushivirira.Kirasi 1B yakakura ne50% kupfuura Kirasi 2B uye 75% yakakura kupfuura Kirasi 3B.
2. Metric thread, shinda yekunze ine nhanho nhatu: 4h, 6h uye 6g, shinda yemukati ine tambo nhatu: 5H, 6 H, 7H. mumamiriro e II level) mune metric thread, kutsauka kwekutanga kweH uye h i zero.Kutsauswa kwakakosha kweG ndekwechokwadi, uye iyo yae, f, uye g haina kunaka.
H ndiyo inowanzo shandiswa kushivirira bhendi chinzvimbo chetambo yemukati, iyo isingawanzo shandiswa seyakapetwa pamusoro, kana ine yakaonda zvakanyanya phosphating layer.G position basic deviation inoshandiswa kune dzakakosha zviitiko, senge kukobvu kukoira, kusingawanzo shandiswa.
Iyo yakapfava yakaonda yeg inowanzo shandiswa kuisa 6-9um.Zvakadai sekudhirowa kwechigadzirwa kunoda 6h bhaudhi, iyo screw thread inotora 6g yekushivirira bhendi pamberi pekupfeka.
Thread fit inosanganiswa zvakanyanya kuita H / g, H / h kana G / h.Kune tambo dzakanatswa fasteners senge mabhaudhi uye nzungu, 6H / 6g fit inokurudzirwa.
3. Zvibodzwa zvine shinda
Main geometric parameters yekuzvirwisa uye yekuzvirovera tambo
1. Huru dhayamita / rekunze zino dhayamita (d1): inofungidzira humburumbira dhayamita yedenga reshinda.Iyo dhayamita yeshinda huru inomiririra dhayamita rezita resaizi yeshinda.
2. Trail / pasi dhayamita (d2): dhayamita yehumburumbira ine dhayamita yakadhindwa.
3. Kureba kwemazino (p): nhambwe yeaxial yemazino ari pedyo inoenderana nemapoinzi maviri pamutsetse wemeridian.Muhuwandu hwemeno mukati meinji imwe neimwe (25.4mm).
Common range (metric) (Chirungu)
(1) Metric self-attack mazino:
Zvinotsanangurwa: ST 1.5, S T1.9, S T2.2, S T2.6, S T2.9, uye ST3.3, S T3.5, S T3.9, S T4.2, S T4.8, S T5.5, ST6.3, S T8.0, S T9.5
Kureba kwemazino: 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) Iyo yeBritish system yemazino ekuzvirwisa:
Tsanangudzo: 4 #, 5 #, 6 #, 7 #, 8 #, 10 #, 12 #, 14 #
Nhamba yemazino: AB mazino 24,20,20,19,18,16,14,14
A mazino 24,20,18,16,15,12,11,10
Nguva yekutumira: Aug-19-2022