The arụmọrụ ọkwa nke bolts eji maka ígwè Ọdịdị njikọ bụ 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 na na. Bolts nke ọkwa 8.8 na n'elu bụ nke obere carbon alloy ígwè ma ọ bụ ọkara carbon ígwè na okpomọkụ-emeso (quenched, tempered), nke a na-akpọkarị elu ike bolts na ndị ọzọ na-adịkarị na-akpọ nkịtị bolts.Eriri ziri ezi dị elu bụ isi ihe na-emeakụkụ dị elu CNC machining.
Ihe akara ọkwa arụmọrụ bolt nwere akụkụ abụọ, nke na-anọchi anya uru ike tensile ọnụ na oke njigide nke ihe mkpuchi ahụ. Dị ka:
Maka bolts nke klas arụmọrụ 4.6, ihe ọ pụtara bụ:
The nominal tensile ike nke bolt ihe ruru 400MPa;
Oke ike nke ihe mkpuchi bụ 0,6;
Ike ntinye aha nke ihe mkpuchi bụ 400 × 0.6 = 240MPa.
Performance ọkwa 10.9 elu ike bolt, ya ihe onwunwe mgbe okpomọkụ ọgwụgwọ, nwere ike iru:
The nominal tensile ike nke bolt ihe ruru 1000MPa;
Oke ike nke ihe mkpuchi bụ 0,9;
Ike ike nke ihe mkpuchi bụ 1000 × 0.9 = 900MPa.
Ihe akara ngosi bolt pụtara bụ ọkọlọtọ mba ụwa. Bolts nke otu ọkwa arụmọrụ, n'agbanyeghị ọdịiche dị n'etiti ihe ha na mmalite ha, nwere otu arụmọrụ, na naanị ọkwa arụmọrụ nwere ike ịhọrọ na nhazi ahụ.
Akara ume ike 8.8 na 10.9 na-ezo aka na shear stress resistance grades nke bolts 8.8GPa na 10.9GPa
8.8 Ọnụ ikike tensile ike 800N/MM2 ike mkpụrụ 640N/MM2
N'ozuzu, "x. Y” na-egosi ike nke bolt, X * 100 = ike tensile nke bolt, X * 100 * (Y / 10) = ike mkpụrụ nke bolt (n'ihi na dị ka labelụ: ike na-enye ike / tensile). ike = Y/10)
Dị ka 4.8, ike nkwụsị nke bolt bụ: 400MPa; Ike mkpụrụ bụ 400*8/10=320MPa.
Na mgbakwunye: igwe anaghị agba nchara na-akpọkarị bolts dị ka A4-70, A2-70, pụtara nkọwa ọzọ.
Iji tụọ ihe
Ogologo nha nha n'ụwa taa enwere ụdị isi abụọ, otu maka usoro metric, ihe nha bụ mita (m), centimeters (cm), millimeters (mm), wdg, na Europe, China na Japan na ndịda ọwụwa anyanwụ ndị ọzọ. Iji Asia eme ihe kariri, ozo bu bekee, ihe a na-acho bu nke kachasi maka inch (inch), nke ya na obodo ochie “n'obodo anyi, a na-eji ya na United States, Britain na mba Europe na America ndi ozo.
Ntụ metric: (isi 10) 1m = 100 cm = 1000 mm
Usoro nke alaeze ukwu: (isi 8) 1 inch = 8 nkeji 1 inch = 25.4 mm 3/8 x 25.4 = 9.52
Ngwaahịa ndị dị n'okpuru 1/4 na-eji nọmba nhọpụta iji gosipụta nha adreesị ha, dị ka: 4#, 5#, 6#, 7#, 8#, 10#, 12#
The ịghasa eri
Eriri bụ udi nwere ahịrị okirikiri otu n'akụkụ mpụta ma ọ bụ n'ime elu nke siri ike. Dabere na njirimara nhazi ya na ojiji ya nwere ike kewaa ụzọ atọ:
eri nkịtị: udi eze triangular, eji ejikọta ma ọ bụ kechie akụkụ. A na-ekewa eriri a na-ahụkarị n'ụdị abụọ nke eriri na-enweghị isi na eri dị mma dịka pitch si dị, eri ọma nwere ike njikọ dị elu.
Eriri nnyefe: nha nha trapezoid, rectangle, saw na triangle, wdg.
Eriri akara: A na-eji maka njikọ akara, tumadi eriri ọkpọkọ, eriri taper na eriri ọkpọkọ.
Nhazi dịka udi siri dị:
Eriri dabara ọkwa
Eriri ziri ezi dị elu bụ akụkụ dị mkpa nke imeakụkụ CNC Machining dị elu.
The dabara bụ ego nke slack ma ọ bụ tightness n'etiti ịghasa eri, na dabara ọkwa bụ kpọmkwem nchikota nke deviations na ndidi na-eme ihe na esịtidem na mpụga eri.
1. N'ihi na Uniform inch thread, e nwere grade atọ maka external thread: 1A, 2A na 3A, na grade atọ maka esịtidem thread: 1B, 2B na 3B, ha niile bụ gap dabara. Ọnụ ọgụgụ dị elu nke ọkwa, otú ahụ ka ọ dị mma. Na inch THREAD, AKWỤKWỌ NDỊ NDỊ DỊ N'ỊNỊTA bụ nanị maka akara ule 1A na 2A, Ngbanwe maka ọkwa 3A bụ efu, na ọkwa ọkwa maka ọkwa 1A na 2A hà nhata. Ka ọnụ ọgụgụ nke akara ule dị ukwuu, ka ntachi obi ahụ dị ntakịrị.
Klas 1A na 1B, akara nnabata na-atọ ụtọ nke ukwuu, dabara adaba maka eriri ime na mpụga.
Klaasị 2A na 2B bụ klaasị nnabata eri kacha akwadoro maka usoro ihe eji arụ ọrụ Britain.
Klas 3A na 3B, ịghasa ka ọ bụrụ nke kachasi ike, dabara adaba maka ihe nkedo nwere nnabata siri ike, maka imewe nchekwa dị oke mkpa.
Maka eriri mpụga, KLASS 1A na 2A nwere nnabata dabara adaba, CLASS 3A enweghị. Nkwenye klaasị 1A bụ 50% karịa nnabata klaasị 2A, 75% karịrị nnabata klaasị 3A, maka eriri dị n'ime, nnabata klaasị 2B bụ 30% karịa nnabata 2A. Klas 1B bụ 50% buru ibu karịa klaasị 2B yana 75% buru ibu karịa klas 3B.
2. Metric threadi, eriri dị n'èzí nwere akara ule atọ: 4h, 6h na 6g, eriri ime nwere akara atọ: 5H, 6H, 7H. (The precision grades of daily thread are I, II, III, and often II.) Na metric thread, the basic deviation of H and h is efu. Ntugharị bụ isi nke G dị mma, na mgbagha bụ isi nke E, F na G adịghị mma.
H bụ mpaghara nnabata a na-ahụkarị nke eriri dị n'ime, anaghị eji ya dịka mkpuchi elu, ma ọ bụ nke nwere akwa phosphating dị gịrịgịrị. G ọnọdụ bụ isi n'ihi na oge pụrụ iche, dị ka akwa mkpuchi, na-adịkarịghị eji.
A na-ejikarị g na-etinye ihe mkpuchi 6-9um dị mkpa, ma ọ bụrụ na ihe osise chọrọ bụ bolts 6h, eriri nke ịghasa tupu ịkwanye na-anabata eriri ndidi 6g.
Ngwakọta kacha mma nke eri dabara H / g, H / h ma ọ bụ G / h, maka bolts, mkpụrụ na eriri eriri ndị ọzọ a nụchara anụcha, ọkọlọtọ akwadoro 6H / 6g dabara.
3. Akara akara
Isi ihe dị na geometric nke onwe - ịme ọpịpị na onwe - eriri egwu
1. Nnukwu dayameta / mpụga (d1): dayameta nke cylinder a na-eche n'echiche nwere okpueze ejiri kpuchie ya. Dayameta eri ahụ na-anọchi anya dayameta aha nke nha eri ahụ.
2. Ụzọ ụkwụ / dayameta ala (d2): dayameta nke cylinder echepụtara echepụta ebe ala nke eriri na-agafe.
3. Oghere eze (p): na-ezo aka na axial anya n'etiti isi abụọ kwekọrọ ekwekọ nke ezé n'akụkụ na midline. Na usoro nke alaeze ukwu, ebe dị anya n'etiti ezé na-egosi ọnụ ọgụgụ nke ezé kwa inch (25.4mm).
Ndị a na-edepụta nkọwapụta nke anya eze (metric) Ọnụọgụ ezé (inch)
1) Metric imetụ aka:
Nkọwapụta: 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
Ebe dị anya eze: 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) eze na-akụ onwe ya nke Britain:
Nkọwapụta: 4#, 5#, 6#, 7#, 8#, 10#, 12#, 14#
Ọnụọgụ ezé: ezé AB 24, 20, 20, 19, 18, 16, 14, 14
eze A 24, 20, 18, 16, 15, 12, 11, 10
Oge nzipu: Ọktoba 08-2022