Kushanda giredhi yemabhoti anoshandiswa simbi chimiro kubatanidza 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 zvichingodaro.Mabhaudhi egiredhi 8.8 uye pamusoro anogadzirwa nesimbi yakaderera kabhoni alloy kana yepakati kabhoni simbi uye inopisa-yakagadziriswa (inodzimwa, yakapfava), iyo inowanzonzi mabhaudhi emasimba makuru uye mamwe anowanzo kunzi akajairwa mabhaudhi.High precision thread ndiyo kiyi yekugadzirayakakwirira mhando CNC machining zvikamu.
Iyo bolt performance giredhi label inoumbwa nezvikamu zviviri, izvo zvakateerana zvinomiririra iyo inonzi tensile simba kukosha uye buckling reshiyo yebhoti zvinhu.Zvakaita se:
Kune mabhaudhi ekirasi yekuita 4.6, chirevo ndechekuti:
Iyo yezita rekusimba simba remabhoti zvinhu zvinosvika 400MPa;
Chiyero chesimba chebhoti zvinhu 0.6;
Simba rekuita goho remabhaudhi zvinhu 400×0.6=240MPa.
Performance giredhi 10.9 yakakwirira simba bhaudhi, zvinhu zvayo mushure mekupisa kurapwa, inogona kusvika:
Iyo yezita rekusimba simba remabhoti zvinhu zvinosvika 1000MPa;
Chiyero chesimba chebhoti zvinhu 0.9;
Iyo yezita regoho simba remabhaudhi zvinhu 1000×0.9=900MPa.
Zvinorehwa negiredhi rekuita bhoti chiyero chepasi rose.Mabhoti egiredhi rimwechete rekuita, zvisinei nemusiyano pakati pezvinhu zvawo uye mavambo, ane maitiro akafanana, uye chete giredhi rekuita rinogona kusarudzwa mukugadzira.
Simba magiredhi 8.8 uye 10.9 anoreva shear stress kuramba mamakisi emabhaudhi 8.8GPa uye 10.9GPa.
8.8 Nominal tensile simba 800N/MM2 nominal goho simba 640N/MM2
Kazhinji, “x.Y" inoshandiswa kuratidza kusimba kwebhaudhi, X * 100 = simba rekusimba rebhaudhi, X * 100 * (Y / 10) = simba regoho rebhoti (nokuti maererano neshoko: goho simba / kusimba simba =Y/10)
Zvakadai se4.8, simba rekusimba rebhaudhi nderokuti: 400MPa;Simba regoho i400*8/10=320MPa.
Mukuwedzera: mabhaudhi esimbi asina tsvina anowanzo kunyorwa seA4-70, A2-70, zvinoreva imwe dudziro.
Kuyera
Hurefu hwekuyeresa unit munyika nhasi kune marudzi maviri makuru, imwe yemetric system, yekuyera unit mita (m), masendimita (cm), millimeters (mm), nezvimwewo, muEurope, China neJapan nedzimwe kumaodzanyemba kwakadziva kumabvazuva. Kushandiswa kweAsia kunowedzera, chimwe chiRungu, chikamu chekuyera chinonyanya kuita masendimita (inch), yakaenzana neguta rekare "munyika yedu, rinoshandiswa zvakanyanya muUnited States, Britain nedzimwe nyika dzeEurope neAmerica.
Metric kuyerwa: (hwaro 10) 1m =100cm=1000 mm
Imperial system: (base 8) 1 inch =8 maminetsi 1 inch =25.4 mm 3/8 x 25.4 =9.52
Zvigadzirwa zviri pazasi 1/4 zvinoshandisa nhamba yezita kumiririra saizi yekero yavo, senge: 4#, 5#, 6#, 7#, 8#, 10#, 12#
The screw thread
Rwonzi chiumbwa chine mitsetse yakafanana yakamonereka pachikamu chekunze kana mukati mechinhu chakasimba.Zvinoenderana nemaitiro ayo uye mashandisirwo ayo anogona kukamurwa muzvikamu zvitatu:
Common thread: triangular mazino chimiro, inoshandiswa kujoina kana kusungira zvikamu.Shinda yakakosheswa inopatsanurwa kuita marudzi maviri eshinda yakaoma uye yakatsetseka zvichienderana nenamo, uye shinda yakatsetseka ine simba rekubatanidza rakakwirira.
Transmission thread: zino chimiro trapezoid, rectangle, saw uye katatu, nezvimwe.
Chisimbiso shinda: Inoshandiswa pakubatanidza chisimbiso, kunyanya pombi shinda, taper shinda uye taper pombi shinda.
Classification maererano chimiro:
Thread fit grade
High precision shinda chinhu chakakosha pakugadzirayakakwirira mhando CNC Machining zvikamu.
Kukwana ndiko kuwanda kwekurembera kana kusimba pakati peshinda shinda, uye giredhi rakakodzera ndiyo yakatsanangurwa musanganiswa wekutsauka uye kushivirira kunobata mukati nekunze shinda.
1. Kune yunifomu inchi shinda, kune mamakisi matatu eshinda yekunze: 1A, 2A uye 3A, uye mamakisi matatu eshinda yemukati: 1B, 2B uye 3B, ese ari gap fit.Iyo yakakwirira nhamba yenzvimbo, iyo inotowedzera kukwana.Muinch THREADS, THE kutsauka kunotsanangurwa chete kumagiredhi 1A ne2A, THE kutsauka kwegiredhi 3A ndiziro, uye THE kutsauka kwegiredhi giredhi 1A ne2A zvakaenzana.Kuwanda kwenhamba yemagiredhi, kudiki kushivirira.
Kirasi 1A uye 1B, yakasununguka kwazvo kushivirira mamakisi, akakodzera kushivirira kukwana kwetambo dzemukati nekunze.
Makirasi 2A uye 2B ndiwo akajairika makirasi ekushivirira akatemerwa maBritish akatevedzana emakanika fasteners.
Kirasi 3A uye 3B, sikuruu kuti iite yakanyatsokodzera, inokodzera mafasteners ane yakasimba kushivirira, yekuchengetedza yakakosha dhizaini.
Kune shinda dzekunze, CLASS 1A ne2A vane kushivirira kwakakodzera, CLASS 3A haina.Kirasi 1A kushivirira ndeye 50% yakakura kupfuura kirasi 2A kushivirira, 75% yakakura kupfuura kirasi 3A kushivirira, yemukati tambo, kirasi 2B kushivirira i30% yakakura kupfuura 2A kushivirira.Kirasi 1B i50% yakakura kupfuura kirasi 2B uye 75% yakakura kupfuura kirasi 3B.
2. Metric thread, tambo yekunze ine tambo nhatu: 4h, 6h uye 6g, shinda yemukati ine tambo nhatu: 5H, 6H, 7H.(Magiredhi chaiwo eshinda yemazuva ese ndiI, II, III, uye kazhinji II.) Mutambo yemetric, kutsauswa kwekutanga kweH nah i zero.Kutsauka kwekutanga kweG kwakanaka, uye kutsauka kwekutanga kweE, F uye G hakuna kunaka.
H ndiyo yakajairwa kushivirira nzvimbo yemukati shinda, kazhinji isinga shandiswe seyekuputira pamusoro, kana ine yakatetepa phosphating layer.G chinzvimbo chakakosha kutsauka kwezviitiko zvakakosha, senge kukobvu kukoira, hazviwanzo shandiswa.
g inowanzo shandiswa kupeta 6-9um yakaonda coating, kana chigadzirwa kudhirowa zvinodiwa ari 6h mabhaudhi, sikuruu shinda isati yaputirwa inotora 6g kushivirira bhendi.
Musanganiswa wakanakisa weshinda inokodzera H/g, H/h kana G/h, yemabhaudhi, nzungu uye dzimwe dzakanatswa tambo dzekusunga, chiyero chakakurudzirwa 6H/6g kukwana.
3. Thread marking
Iwo makuru ejometri maparamendi ega-kutepa uye ega-yekuchera shinda
1. Huru dhayamita / dhayamita rekunze (d1) : dhayamita yehumburumbira yekufungidzira ine korona dzine shinda dzakaturikidzana.Iyo dhayamita yeshinda inomiririra dhayamita rezita resaizi yeshinda.
2. Nzira yetsoka/dhayamita yepasi (d2) : dhayamita rehumburumbira rekufungidzira panopindirana pasi peshinda.
3. Kuparadzana kwemazino (p) : zvinoreva nhambwe yeaxial iri pakati pemapoinzi maviri anofambirana emazino epadhuze pamutsetse wepakati.Muhutongi hwehumambo, chinhambwe chiri pakati pemeno chinoratidzwa nenhamba yemazino pa inch (25.4mm).
Izvi zvinotevera zvinorongeka zvakajairwa zvechinhambwe chemazino (metric) Nhamba yemeno (inch)
1) Metric self-tapping:
Zvinotsanangurwa: ST 1.5, 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
Chinhambwe chezino: 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) Mazino ekuBritain anozvirova:
Zvinotsanangurwa: 4#, 5#, 6#, 7#, 8#, 10#, 12#, 14#
Nhamba yemazino: AB mazino 24, 20, 20, 19, 18, 16, 14, 14
Zino A 24, 20, 18, 16, 15, 12, 11, 10
Nguva yekutumira: Oct-08-2022