Mgbe ọtụtụ afọ nke ime igwe, ị maghị ihe akara ịghasa pụtara, nri?
The arụmọrụ ọkwa nke bolts maka ígwè Ọdịdị njikọ na-ekewa n'ime karịa 10 akara ule, gụnyere 3.6,4.6,4.8,5.6,6.8,8.8.8,9.8,10.9,12.9.Ihe mkpuchi nke klas 8.8 na n'elu bụ nke obere carbon alloy steel ma ọ bụ ọkara carbon steel na ọgwụgwọ okpomọkụ (quenching, tempering), nke a na-akpọkarị bolts ike dị elu, na ndị ọzọ na-akpọkarị bolts nkịtị.Akara ọkwa arụmọrụ bolt nwere akụkụ abụọ nke ọnụọgụgụ, n'otu n'otu na-anọchi anya uru ike tensile ọnụ na oke ike mgbanwe nke ihe bolt. dịka ọmụmaatụ:
Bolts nke ọkwa arụmọrụ 4.6, nke pụtara:
The nominal tensile ike nke bolt ihe ruru 400MPa larịị;
Oke ike mgbanwe nke ihe mkpuchi bụ 0,6;
Ike ntinye aha nke ihe mkpuchi ahụ ruru ọkwa 400 × 0.6 = 240MPa.
Performance ọkwa 10.9 elu ike bolts, onye ihe onwunwe mgbe okpomọkụ ọgwụgwọ, nwere ike iru:
The nominal tensile ike nke bolt ihe ruru 1000MPa larịị;
Oke ike mgbanwe nke ihe mkpuchi bụ 0.9;
Ike ntinye aha nke ihe mkpuchi ahụ ruru ọkwa 1000 × 0.9 = 900MPa.
Ihe ọ pụtara ọkwa arụmọrụ bolt bụ ọkọlọtọ mba ụwa, otu ọkwa arụmọrụ nke bolt, n'agbanyeghị ọdịiche dị na ihe onwunwe ya na mmalite ya, arụmọrụ ya bụ otu ihe ahụ, imewe nwere ike họrọ naanị ọkwa arụmọrụ.
Akara ume ike 8.8 na 10.9 bụ ọkwa nrụsi ike nke 8.8GPa na 10.9GPa
8.8 Ike tensile ọnụ ọnụ 800 N/MM2 Ike mkpụrụ 640 N/MM2
A na-eji bolts izugbe na "X. Y" na-egosi ike, X * 100 = ike ike nke bolt a, X * 100 * (Y / 10) = ike nke bolt a (dị ka akpọrọ: ike ike / ike nkwụsị = Y). / 10)
Maka klas 4.8, ike nkwụsị nke bolt bụ 400MPa;ike mkpụrụ bụ 400 * 8 / 10 = 320MPa.
Ọzọkwa: igwe anaghị agba nchara na-akpọkarị bolts dị ka A4-70, A2-70 ọdịdị, a kọwara ihe ọ pụtara ma ọ bụghị.
tụọ
Ogologo oge n'ụwa nwere ọnụọgụ abụọ nke nha, otu bụ usoro metric, unit nke nha maka mita (m), cm (m) (cm), mm (mm), wdg, na steeti, China na Japan na ndị ọzọ n'ebe ndịda ọwụwa anyanwụ Asia na-eji ihe ọzọ, nke ọzọ bụ British, unit nke nha tumadi maka sentimita (inch), Ẹkot ochie obodo ọnọdụ, na United States, United States na ndị ọzọ na Europe na America mba ndị ọzọ.
Ntụ metric: (10 mex) 1m = 100 cm = 1000 mm
Ntụle ndị Britain: (8 r) 1 inch = 8 kilomita 1 inch = 25.4 mm 3 / 8?? × 25.4 = 9.52
1/4??A na-agụ ngwaahịa ndị a ọnụ iji gosi aha ha, dịka: 4 #, 5 #, 6 #, 7 #, 8 #, 10 #, 12 #
ịghasa eri
Eriri bụ udi nwere convex nwere otu okirikiri na mpaghara mpụta ma ọ bụ n'ime elu nke siri ike.Dabere na njirimara nhazi ya na ojiji ya, enwere ike kewaa ya ụzọ atọ:
eri nkịtị: nha nha nha istriangleShape, ejiri maka ijikọ ma ọ bụ kechie akụkụ ahụ.A na-ekewa eri nkịtị n'ụdị ezé abụọ na-esighị ike na eriri ezé dị mma dị ka pitch, ike njikọ nke eriri nha nha dị mma dị elu.
Eriri nnyefe: nha nha nwere trapezoidal, rectangular, saw na triangle, wdg.
Eriri akara: ejiri maka njikota akara, tumadi eriri ọkpọkọ, eriri cone na eriri tube cone.
Nhazi site na udi
Eji akara akara
Eriri dabara bụ nha nke rụrụ arụ ma ọ bụ nke siri ike n'etiti eriri ịghasa, na ọkwa nke dabara bụ nchikota nchikota na nnabata nke eriri ime na nke mpụga.
1. Maka eriri Briten jikọrọ ọnụ, e nwere grade atọ nke eriri mpụga: 1A, 2A na 3A, ma enwere akara atọ: 1B, 2B na 3B, ha niile na-adakọ ọnụ.Ọnụ ọgụgụ dị elu dị elu, nhazi ahụ na-esiwanye ike.Na eriri ndị Britain, ndịiche na-akọwapụta naanị akara ule 1A na 2A, akara ule 3A bụ efu, na akara ule 1A na 2A hà nhata.Ọnụ ọgụgụ nke akara ule buru ibu, nke nta nke ntachi obi.
Klas 1A na 1B, ọkwa nnabata dị nro, dabara adaba maka eriri ime na mpụta.
Klas 2A na 2B bụ klaasị nnabata eri kacha akọwapụta maka usoro ihe nrụnye nke Britain.
Klas 3A na 3B, nke na-etolite ihe siri ike maka ihe ngbochi nnabata maka imewe nchekwa dị oke mkpa.
Maka eriri ndị dị n'èzí, 1A na 2A nwere ndidi mating na 3A adịghị. 1A ndidi 50% buru ibu karịa 2A ndidi na 75% karịa 3A ndidi.Maka eriri dị n'ime, nnabata 2B bụ 30% buru ibu karịa nnabata 2A.Klas 1B bụ 50% buru ibu karịa Klas 2B yana 75% buru ibu karịa Klas 3B.
2. Metric thread, mpụga eri nwere atọ eri larịị: 4h, 6h na 6g, esịtidem eri nwere atọ eri larịị: 5H, 6 H, 7H. na ọnọdụ nke II larịị) na metric eri, isi deviation nke H na h bụ efu.Ngbanwe dị mkpa nke G dị mma, na nke e, f, na g adịghị mma.
H bụ eriri ndidi nke a na-ejikarị eme ihe dị ka ihe mkpuchi elu, ma ọ bụ nke nwere nnukwu phosphating oyi akwa.A na-eji ndahie isi ọnọdụ G maka oge pụrụ iche, dị ka mkpuchi siri ike, nke a na-ejikarị adịkarịghị.
A na-ejikarị ihe mkpuchi dị mkpa nke g na-etinye 6-9um.Dị ka ihe osise ngwaahịa chọrọ bolt 6h, eriri nke ịghasa na-anabata eriri ndidi 6g tupu mkpuchi ahụ.
A na-ejikọta eriri eriri kachasị mma na H / g, H / h ma ọ bụ G / h.Maka eriri nke eriri ndị a nụchara anụcha dị ka bolts na mkpụrụ, 6H/6g kwesịrị ekwesị ka akwadoro.
3. Akara akara
Isi geometric parampat nke mbuso onwe ya na eriri-egwupụta onwe ya
1. Nnukwu dayameta / mpụta nha nha nha (d1): dayameta cylinder hypothetical maka ụlọ eri.Nnukwu dayameta eri na-anọchi anya dayameta aha nke nha eri ahụ.
2. Trail / ala dayameta (d2): a hypothetical cylinder dayameta na threaded isi nkpuchi.
3. Ogologo eze (p): oghere axial nke ezé dị n'akụkụ kwekọrọ na isi abụọ na akara meridian.N'ọnụọgụ ezé n'ime inch ọ bụla (25.4mm).
Nke a na-ahụkarị (metric) (Bekee)
(1) Metric ezé ọgụ onwe:
Nkọwapụta: ST 1.5, S T1.9, S T2.2, S T2.6, S T2.9, na 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
Ogologo ezé: 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) Usoro eze nke igbu onwe onye nke Britain:
Nkọwa: 4 #, 5 #, 6 #, 7 #, 8 #, 10 #, 12 #, 14 #
Ọnụọgụ ezé: ezé AB 24,20,20,19,18,16,14,14
A ezé 24,20,18,16,15,12,11,10
Oge nzipu: Ọgọst-19-2022