Nea ɛyɛ UNF nhama ne UNC nhama .

Wɔ wiase a wɔyɛ nneɛma ne mfiridwuma ho nimdeɛ mu no, nneɛma a ɛma ɛfata no yɛ ade titiriw. Ɛhɔ na thread gyinapɛn ahorow ba asɛm no mu. Wɔte sɛ mmara a ɛfa sɛnea spirals a ɛwɔ bolt so no ne spirals no hyia wɔ nut mu no. Saa mmara yi ho hia yiye efisɛ ɛhwɛ hu sɛ afã horow no kura mu yiye, na ebetumi adi adwuma a wɔahyɛ sɛ wɔnyɛ no ho dwuma a wonbubu.

Nteaseɛ a ɛfa asaawa gyinapɛn ho .

Dɛn ne asaawa gyinapɛn ahorow?

Momma yɛnhyɛ aseɛ denam nteaseɛ a yɛbɛte aseɛ wɔ deɛ thread gyinapɛn  yɛ so. Sɛ yɛbɛka no tiawa a, ɛyɛ akwankyerɛ ahorow a ɛkyerɛkyerɛ nhama a wɔde di dwuma wɔ nhama, nkɔnsɔnkɔnsɔn, ne nnuaba mu no nsusuwii, ne kɛse, ne sɛnea wotumi gyina ano mu. Susuw wɔn ho sɛ ɛyɛ aduan a wɔde yɛ aduan a wɔde yɛ nhama a ɛfata yiye. Saa gyinapɛn ahorow yi hwɛ hu sɛ bolt bi a efi adwumakuw biako mu bɛfata wɔ nut a efi foforo mu, a ɛbɛkɔ so ayɛ nea ɛkɔ so pɛpɛɛpɛ  na ɛyɛ pɛpɛɛpɛ  wɔ nnwuma ahorow mu.

Dwuma a asaawa gyinapɛn di wɔ nnwuma mu .

Asaawa gyinapɛn ahorow di dwuma titiriw wɔ wiase a ɛfa nneɛma a wɔyɛ  ne mfiridwuma ho . Wɔyɛ abran a wɔanto wɔn dwom wɔ biribiara a wɔboaboa ano fi ɛlɛtrɔnik nneɛma a ɛwɔ ɔmansin kyerɛwpon so kosi  akɛse so . nipadua  wimhyɛn Wɔ nnwuma te sɛ a wɔde yɛ wimhyɛn ho mfiri , kar , ne ahunmu hyɛn mpo mu no , saa gyinapɛn ahorow yi hwɛ hu sɛ biribiara a wɔde kyekyere nneɛma , ho ne nea wɔde twitwa nneɛma mu , ne mfiri fã biara ne no bom pɛpɛɛpɛyɛ  ne ahoɔden a ɛkɔ soro . Ɛnyɛ sɛ eyi ho hia yiye ma nkitahodi a emu yɛ den nko, na mmom sɛnea ɛbɛyɛ a  nso . agyina  na ahobammɔ wom  nneɛma no bɛkɔ so

Abakɔsɛm tiawa a ɛfa Unified Thread Standard (UTS) ho .

Afei, momma yɛntu kwan ntɛmntɛm nkɔ abakɔsɛm kwan so. Unified Thread Standard (UTS) no  baa asɛm no mu sɛ ɔkwan a wɔbɛfa so ama nhama a wɔde skru ayɛ no ayɛ mmerɛw na wɔayɛ no pɛpɛɛpɛ  wɔ United States ne Canada. Ansa na UTS reba no, na asaawa gyinapɛn ahorow pii wɔ hɔ, na na ɛyɛ ahodwiriw koraa. UTS de obiara a ɔwɔ kratafa koro a ɛwɔ ahorow abien titiriw bae: Unified National Coarse (UNC)  ne Unified National Fine (UNF) ..

L UNC threads : Wonim no sɛ ɛyɛ coarse  pitch, saa threads yi yɛ kɛse ma general applications. Ɛyɛ mmerɛw sɛ wɔbɛyɛ na wɔadi ho dwuma, na ɛma ɛyɛ nea nkurɔfo ani gye ho wɔ nnwuma mu a wohia ano aduru a wɔde kyekyere ho  a ebetumi agyina ahodwiriw nhyɛso  ne ahoɔhare a wɔde dannan wɔn ho ano ..

L UNF Threads : Eyinom wɔ ɛnne a ɛyɛ fɛ  , na ɛma ahoɔden a ɛkorɔn  ne pɛpɛɛpɛ . Wɔtaa de di dwuma wɔ applications te sɛ ahunmu  ne precision instruments , baabi a milimita biara bu akontaa.

UNC ne UNF nhama nyinaa hwe ase wɔ Unified Screw Thread Series ase , a ɛte sɛ abusua kɛse bi a ɛyɛ nkɔnsɔnkɔnsɔn  a wɔayɛ sɛ ɛbɛyɛ adwuma wɔ biakoyɛ mu.

Chart no fi adi .

Sɛ wopɛ sɛ wuhu nea ɛwɔ ho a, fa no sɛ ɛyɛ screw thread chart . Saa nhyehyɛe yi kyerɛ nhama akɛse ne ahorow nyinaa wɔ UTS no ase, a nhama a ɛyɛ mmerɛw a ɛyɛ mmerɛw  ne nhama a ɛyɛ fɛ a ɛyɛ biako ka ho . Ɛyɛ adwinnade a wɔde kɔ mfiridwumayɛfo ne wɔn a wɔyɛ nneɛma mu sɛ wɔbɛpaw asaawa a ɛfata  ama wɔn aplikeshɔn pɔtee bi ..

Threading nam application ahorow so .

Sɛ yɛbɛka no yiye a, ɛkame ayɛ sɛ asaawa gyinapɛn ahorow no wɔ akyi wɔ mfiri biara a wɔde yɛ nneɛma mu. Sɛ nhwɛso no, wɔ ɛlɛtrɔnik mfiri mu no , UNF nhama a ɛyɛ pɛpɛɛpɛ no hwɛ ma nneɛma a ɛwom no hyia pɛpɛɛpɛ  . Wɔ dwumadie akɛseɛ mu, te sɛ kar  anaa wimhyɛn mu no, UNC nhama boa ma wɔkyekyere chassis afã a ɛyɛ den  ne engine no afã ..

Nea enti a eyi ho hia .

Thread standards a yɛbɛte ase, titiriw nsonsonoe a ɛda UNF  ne UNC , ntam no ho hia yiye. Ɛnyɛ sɛ ɛbɛma asinasin abien ayɛ nea ɛfata kɛkɛ; Ɛfa ahobammɔ a wobɛhwɛ ahu , sɛ wowɔ ahobammɔ , ne sɛnea ɛyɛ adwuma yiye ho . Sɛ ɛyɛ adwuma a ɛkorɔn a ɛyɛ pɛpɛɛpɛ  wɔ ahunmu  anaa amansan nhyiam mu wɔ mfiridwuma mu , asaawa a ɛfata - sɛ ɛyɛ unf  anaa UNC  - betumi ama nsonsonoe nyinaa aba wɔ adwumayɛ  ne nkwa tenten  a ɛwɔ ade bi mu. Sɛ yɛbɔ no mua a, thread gyinapɛn te sɛ UNF  ne UNC  wɔ Unified Thread Standard ase  no yɛ ade titiriw wɔ nneɛma a wɔyɛ a wotumi de ho to so na ahobammɔ wom no mu. Wɔhwɛ hu sɛ biribiara fi screw ketewaa bi  a ɛwɔ circuit board so kosi  kɛse a bolt  ɛwɔ wimhyɛn mu  no yɛ adwuma no, na ɛde ahoɔden a ɛho hia , pɛpɛɛpɛ , ne resistance  a ehia wɔ dwumadie ahodoɔ mu ma.

Asaawa a ɛyɛ pɛ (UTS) .

Unified Thread Standard (UTS) no te sɛ mmara nwoma a wɔde yɛ nhama a wɔde di dwuma wɔ Amerika Atifi fam. Ɛyɛ nea ɛhwɛ hu sɛ skru bi  a efi baabi no hyia nut bi  a efi baabi. Saa gyinapɛn yi ho hia yiye wɔ nnwuma te sɛ Aerospace , Automotive Manufacturing , ne mpo ɛlɛtrɔnik mfiri ..

Nneɛma a ɛwɔ UTS mu .

UTS wɔ afã atitiriw abiɛsa:

1. Thread form : Eyi ne asaawa no nsusuwii. Fa no sɛ ɛte sɛ nsusuwso a ɛwɔ bolt anaa screw so. Ɛho hia efisɛ ɛkyerɛ sɛnea afã abien no bɛbom ayɛ yiye.

2. Series : Eyi fa nhama ahorow ahorow ho. Wɔ UTS mu no, nsɛm atitiriw abien na ɛwɔ hɔ - ɔman no mu a ɛyɛ mmerɛw (UNC) ne ɔman ka a ɛyɛ biako (UNF). Coarse series (UNC) no wɔ nhama kakraa bi wɔ inch biara mu, bere a fine series (UNF) no wɔ pii. Saa nsonsonoe yi ka sɛnea nkitahodi no mu bɛyɛ den ne sɛnea ɛyɛ den no.

3. Classes of Fit : Eyi te sɛ level a ɛyɛ snugness wɔ threads no ntam. Ɛfa sɛnea ɛyɛ den anaasɛ ɛyɛ mmerɛw no ho. Adesua ahorow pii wɔ hɔ, a emu biara fata ma application ahorow ..

UTS a ɛwɔ Amerika Atifi fam nyinaa .

Wɔ Amerika Atifi fam no, UTS wɔ baabiara. Sɛnea wɔde di dwuma ni:

l Manufacturing Technique : Nnwumakuw de UTS di dwuma de yɛ nneɛma ahorow nyinaa. Efi amansin nketewa  so kosi wimhyɛn engine afã akɛse so ..

l Precision Instruments : Wɔ gadgets ne mfiri a ɛhia super high precision , te sɛ wɔ ahunmu  anaa wimhyɛn mfiri mu no , UTS boa wɔ afã horow a ɛfata pɛpɛɛpɛ mu.

l Kar ne mfiridwuma ho nimdeɛ : Kar, lɔre, ne mfiri mpo a ɛwɔ adwumayɛbea ahorow no hia afã horow a ɛfata pɛpɛɛpɛ. UTS ma eyi ba, sɛ ɛyɛ engine afã horow , chassis components , anaasɛ mpo nipadua nhyehyɛe ..

L Electronic Components : Wɔ gadgets nketewa mu no, UTS nso di dwuma kɛse. Ɛhwɛ ma bolt  ne nkɔnsɔnkɔnsɔn nketenkete  a ɛwɔ ɛlɛtrɔnik nneɛma mu no nyinaa  hyia yiye.

UTS wɔ adeyɛ mu .

Fa no sɛ woreyɛ robɔt. Wohia bolts ne screws a ɛbɛkura mu denneennen. Wobɛpaw UNC  anaa UNF thread a ɛfata no  a egyina nea robɔt no bɛyɛ so. So ɛho behia sɛ egyina pii ano ahodwiriw adwennwen ? Anaasɛ ɛho hia sɛ ɛyɛ pɛpɛɛpɛ ankasa? UTS kyerɛ wo kwan wɔ saa paw ahorow yi mu.

UTS te sɛ kasa a wɔn a wɔyɛ wɔ Amerika Atifi fam nyinaa ka. Ɛfa hwɛ a wɔbɛhwɛ sɛ biribiara hyia pɛpɛɛpɛ, sɛ ɛyɛ screw ketewaa bi a ɛwɔ smartphone mu anaasɛ bolt kɛse bi a ɛwɔ wimhyɛn mu. Saa gyinapɛn yi ma nneɛma kɔ so yɛ nea ahobammɔ wom, ɛyɛ den, na ɛyɛ adwuma yiye.

Su horow a ɛwɔ UNF nhama mu .

UNF nhama a wobɛte ase: ɛnne a ɛyɛ fɛ a ɛyɛ biako .

Momma yɛnkɔ UNF threads mu , a wonim no sɛ ɛyɛ Unified Fine Pitch . Saa nhama yi yɛ asaawa wiase no mu adwumfo a wɔyɛ nsɛm a ɛkɔ akyiri. Wɔwɔ nhama pii wɔ inch biara mu sen UNC nhama , a ɛkyerɛ sɛ ɛyɛ fɛ na ɛbɛn ho. Saa nhyehyɛe pa yi nyɛ ɔyɛkyerɛ nkutoo; Ne nyinaa fa pɛpɛɛpɛyɛ ho.

Nneɛma a wɔde di dwuma ne mfaso a ɛwɔ UNF nhama so .

UNF threads yɛ go-to choice wɔ scenarios a ɛkorɔn pɛpɛɛpɛ  ne ahoɔden  yɛ key. Ɛha na wɔhyerɛn:

l Ahunmu : Wɔ wimhyɛn ne ahunmu hyɛn mu no, ɔfã ketewaa biara ho hia. Wɔde UNF nhama di dwuma wɔ ha ma ɛyɛ pɛpɛɛpɛ.

l Precision Instruments : Susuw mfiri a ɛwɔ labs anaa aduruyɛ nnwinnade mu ho. UNF nhama boa saa gadgets yi ma ɛyɛ pɛpɛɛpɛ na wotumi de ho to so.

l Automotive Manufacturing : Wɔ kar mu, titiriw wɔ engine afã horow  ne ɛlɛtrɔnik nneɛma mu , UNF nhama ma ɛfata pɛpɛɛpɛ a ehia.

l Electronic Equipment : Wɔ nketewa mpo mu no circuit board , UNF nhama ho hia ma biribiara a ɛka bom denneennen.

UNF nhama no kɛse ne ne kɛse a ɛkɔ akyiri .

Sɛ yɛka UNF nhama no nsusuwii ho asɛm a, yɛrehwɛ screw thread chart . Saa nhyehyeɛ yi kyerɛ akɛseɛ nyinaa - ne ntwemu, ne nnyigyeiɛ, ne ne tenten. UNF nhama no ntwemu tumi fi nketewa paa so kosi akɛse koraa so, nanso ade titiriw ne nne a ɛyɛ fɛ  - nhama pii wɔ screw no nsateakwaa biara mu.

UNF nhama a ɛkorɔn wɔ pɛpɛɛpɛyɛ mu .

Wɔ wiase a wɔyɛ nneɛma a ɛkorɔn no mu no, UNF nhama no te sɛ VIPfo. Wɔde ma:

L Ahoɔden a Ɛkorɔn : Esiane sɛ wɔn ano yɛ den nti, wobetumi adi adesoa ne adwennwen pii ho dwuma.

l Tight Connection : Nhama pii kyerɛ sɛ ɛyɛ den sɛ wobɛkura mu. Eyi ho hia kɛse wɔ afã horow a ɛnsɛ sɛ ɛsansan, titiriw wɔ wosow ase.

l Precision : Sɛ wowɔ threads pii a, hokwan a ɛwɔ hɔ sɛ wobɛkanyan anaa wobɛyera no sua. Eyi ho hia wɔ nnwinnade a wɔde yɛ nneɛma a ɛyɛ pɛpɛɛpɛ  ne ahunmu nneɛma mu ..

Wɔ adeyɛ mu .

Fa no sɛ woreboaboa mfiridwuma a ɛkorɔn a wɔfrɛ no drone ano. Ɛsɛ sɛ ɔfã biara fata pɛpɛɛpɛ. UNF nhama boa wo ma wobɔ ɔfã biara mu pɛpɛɛpɛ, na ɛhwɛ hu sɛ drone no gyina hɔ pintinn na wotumi de ho to so.

                                                                                            UNF Nhama ANSI B1.1

Nhama a ne kɛse yɛ kɛse (IN)	wɔ inch biara mu (TPI)	Ntrɛwmu titiriw (in)	kɛse (mm)	Tap Drill Size (mm)	Pitch (mm) .
#0 - 80 .	80	0.060	1.524	1.25	0.317
#1 - 72 na ɛwɔ hɔ.	72	0.073	1.854	1.55	0.353
#2 - 64 na ɛwɔ hɔ.	64	0.086	2.184	1.90	0.397
#3 - 56 .	56	0.099	2.515	2.15	0.453
#4 - 48 na ɛwɔ hɔ.	48	0.112	2.845	2.40	0.529
#5 - 44 .	44	0.125	3.175	2.70	0.577
#6 - 40 .	40	0.138	3.505	2.95	0.635
#8 - 36 na ɛwɔ hɔ.	36	0.164	4.166	3.50	0.705
#10 - 32 na ɛwɔ hɔ.	32	0.190	4.826	4.10	0.794
#12 - 28 na ɛwɔ hɔ.	28	0.216	5.486	4.70	0.907
1/4' - 28 .	28	0.250	6.350	5.50	0.907
5/16' - 24 .	24	0.313	7.938	6.90	1.058
3/8' - 24 .	24	0.375	9.525	8.50	1.058
7/16' - 20 .	20	0.438	11.112	9.90	1.270
1/2' - 20 .	20	0.500	12.700	11.50	1.270
9/16' - 18 .	18	0.563	14.288	12.90	1.411
5/8' - 18 .	18	0.625	15.875	14.50	1.411
3/4' - 16 .	16	0.750	19.050	17.50	1.587
7/8' - 14 .	14	0.875	22.225	20.40	1.814
1' - 12 .	12	1.000	25.400	23.25	2.117
1 1/8' - 12 .	12	1.125	28.575	26.50	2.117
1 1/4' - 12 .	12	1.250	31.750	29.50	2.117
1 3/8' - 12 .	12	1.375	34.925	32.75	2.117
1 1/2' - 12 .	12	1.500	38.100	36.00	2.117

Sɛ yɛbɛbɔ no mua a, UNF nhama no nyinaa fa nsɛm a ɛkɔ akyiri ne nea ɛyɛ pɛpɛɛpɛ ho. Wɔyɛ abran a wɔanto wɔn dwom wɔ mfiridwuma mu nimdeɛ a ɛkorɔn ne adwennwen a ɛkorɔn pii mu, efi ahunmu a emu dɔ wɔ ahunmu hyɛn mu kosi nneɛma a ɛho hia a ɛwɔ kar engine a ɛyɛ adwuma yiye mu. Wɔn nnyigyei pa ne ahoɔden a ɛkorɔn no ma wɔyɛ nea ɛho hia wɔ wiase a ɛyɛ pɛpɛɛpɛ nhyiam  ne nneɛma a ɛkorɔn a wɔyɛ ..

UNC nhama a wɔrehwehwɛ mu .

UNC threads: Unified coarse pitch no kyerɛkyerɛɛ mu .

UNC nhama  gyina hɔ ma ɔman no mu nhama a ɛyɛ mmerɛw a wɔaka abom  . Fa wɔn sɛ wɔn ho yɛ den na wotumi de ho to wɔn so wɔ asaawa abusua no mu. Wɔwɔ nhama kakraa bi wɔ inch biara mu sɛ wɔde toto UNF nhama ho a , a ɛkyerɛ sɛ ɛyɛ coarser. Saa coarseness yi nyɛ sintɔ; Ɛyɛ nokwarem no, ɛyɛ ade kɛse a ɛka ho wɔ tebea horow pii mu.

UNC nhama a wɔtaa de di dwuma .

Ɛhe na UNC nhama no fata? Hwɛ ntɛm ara ni:

l Construction : Wɔ adan ne abɔnten so no, UNC nhama yɛ pɛpɛɛpɛ ma nneɛma a emu yɛ duru a wɔde bɛka abom.

l General Machinery : Wɔ mfiri a enhia super fine precision, te sɛ kar anaa nnwinnade akɛse afã horow bi mu no, UNC nhama yɛ adwuma no yiye.

l Consumer Products : Nneɛma a yɛde di dwuma da biara da, te sɛ furniture anaa home appliances, taa nya UNC threads a ɛma wɔbom tra.

Ahoɔden ne abodwokyɛre wɔ UNC threading mu .

UNC nhama no yɛ nea wonim no wɔ nneɛma abien ho: ahoɔden  ne abodwokyɛre ..

L Ahoɔden : Wɔn ho yɛ den sɛ wɔbɛkura adan akɛseɛ mu, ɛno nti na wohu wɔn wɔ adansiɛ ne mfiri a emu yɛ duru mu.

l Tolerance : Wɔyɛ bɔne fafiri sen nhama pa. Eyi kyerɛ sɛ wobetumi adi efĩ, nneɛma a asɛe ho dwuma, na ɛnyɛ den sɛ wɔbɛbɔ na wɔayiyi, a ɛyɛ kɛse wɔ mmeae a ɛhɔ yɛ den no.

Nneɛma a wɔyɛ ho nsusuwii ma UNC nhama .

Sɛ ɛba sɛ wɔde UNC nhama bɛyɛ nneɛma a, nsɛntitiriw kakraa bi wɔ hɔ a ɛsɛ sɛ yɛhyɛ no nsow:

l Ease of Manufacturing : Ɛyɛ mmerɛw na ɛyɛ ntɛm sɛ wɔbɛyɛ sen nhama a ɛyɛ fɛ. Eyi yɛ asɛm kɛse bere a woreyɛ nkɔnsɔnkɔnsɔn anaa nkɔnsɔnkɔnsɔn mpempem pii no.

l Ka a wɔbɔ : Esiane sɛ ɛyɛ mmerɛw sɛ wɔbɛyɛ nti, ɛtaa yɛ nea ɛho ka sua. Eyi ho hia wɔ nneɛma a wuhia fasteners pii nanso enhia super fine precision.

l versatility : Ɛyɛ nea wotumi de di dwuma wɔ akwan horow so. Wubetumi de UNC nhama adi dwuma wɔ nneɛma ahorow pii mu, efi mfiri a emu yɛ duru so kosi nneɛma a wɔde di dwuma da biara da so.

                                                                            UNC nhama sɛnea ANSI B1.1

Nhama a ne kɛse yɛ kɛse (in)	wɔ nsateakwaa biara mu (TPI)	kɛse (in)	kɛse (mm)	Tap Drill Size (mm)	Nneyɛe (mm) .
#1 - 64 na ɛwɔ hɔ.	64	0.073	1.854	1.50	0.397
#2 - 56 .	56	0.086	2.184	1.80	0.453
#3 - 48 na ɛwɔ hɔ.	48	0.099	2.515	2.10	0.529
#4 - 40 .	40	0.112	2.845	2.35	0.635
#5 - 40 .	40	0.125	3.175	2.65	0.635
#6 - 32 na ɛwɔ hɔ.	32	0.138	3.505	2.85	0.794
#8 - 32 na ɛwɔ hɔ.	32	0.164	4.166	3.50	0.794
#10 - 24 .	24	0.190	4.826	4.00	1.058
#12 - 24 na ɛwɔ hɔ.	24	0.216	5.486	4.65	1.058
1/4' - 20 .	20	0.250	6.350	5.35	1.270
5/16' - 18 .	18	0.313	7.938	6.80	1.411
3/8' - 16 .	16	0.375	9.525	8.25	1.587
7/16' - 14 .	14	0.438	11.112	9.65	1.814
1/2' - 13 .	13	0.500	12.700	11.15	1.954
9/16' - 12 .	12	0.563	14.288	12.60	2.117
5/8' - 11 .	11	0.625	15.875	14.05	2.309
3/4' - 10 .	10	0.750	19.050	17.00	2.540
7/8' - 9 .	9	0.875	22.225	20.00	2.822
1' - 8 .	8	1.000	25.400	22.85	3.175
1 1/8' - 7 .	7	1.125	28.575	25.65	3.628
1 1/4' - 7 .	7	1.250	31.750	28.85	3.628
1 3/8' - 6 .	6	1.375	34.925	31.55	4.233

UNC threads te sɛ asaawa wiase no adwuma apɔnkɔ a wotumi de ho to so. Ebia wonni UNF nhama no ho nsɛm a ɛyɛ fɛ no, nanso wɔde wɔn ahoɔden, abodwokyɛre, ne sɛnea wotumi yɛ nneɛma pii no na ɛma ɛyɛ yiye. Efi adan a ɛwɔ soro a wobɛkɔ so agyina so kosi sɛ wobɛhwɛ ahu sɛ wo dan mu pon yɛ den so no, UNC nhama yɛ nneɛma a ɛho hia wɔ nneɛma a wɔyɛ no da biara da ne adansi akɛse nyinaa mu.

UNF ne UNC nhama a wɔde toto ho .

Nsonsonoe titiriw a ɛwɔ ɛnne nnyigyei ne ahoɔden mu .

Sɛ yɛhwɛ UNF (Unified National Fine)  ne UNC (Unified National Coarse)  nhama a, nneɛma atitiriw a ɛda nsow ne ɛnne  ne ahoɔden ..

l Pitch : UNF threads wɔ pitch a ɛyɛ fɛ, a ɛkyerɛ sɛ threads pii wɔ inch biara mu. UNC threads yɛ coarser a threads kakraa bi na ɛwɔ inch biara mu.

L Ahoɔden : UNF nhama a ɛyɛ fɛ no ma wɔn ahoɔden kɛse wɔ nhyɛso mu. Wotumi di ahoɔden pii ho dwuma a wonbubu sɛ wɔde toto UNC nhama ho a.

Ɛfata sɛ wɔde di dwuma wɔ akwan horow so .

UNF ne UNC nhama a wobɛpaw no gyina baabi a wɔde bedi dwuma so.

l UNF Threads : Ɛyɛ papa ma dwumadie a ɛhia sɛ ɛyɛ pɛpɛɛpɛ a ɛkorɔn , te sɛ  na ahoɔden ahunmu  anaa pɛpɛɛpɛyɛ nnwinnadeɛ ..

L UNC Threads : Ɛfata yiye ma general construction ne products wɔ baabi a pɛpɛɛpɛyɛ ho nhia pii, nanso durability ne east of use ho hia.

Nneɛma a ɛma obi tumi yɛ ne ho: UNF vs. UNC .

Self-locking  yɛ ade kɛse wɔ mmeae a wosow betumi ama nhama no ayɛ mmerɛw.

L UNF Threads : Wɔn pitch pa no ma wotumi yɛ wɔn ho yiye, na ɛma ɛfata ma mmeae a ɛwosow kɛse te sɛ wimhyɛn anaa mfiri.

L UNC Threads : Bere a wobetumi ayɛ self-locking no, wɔn coarser pitch no ma wɔyɛ nea etu mpɔn kakra wɔ eyi mu sɛ wɔde toto UNF threads ho a.

Nsɔano ne ahoɔden a wɔde yɛ ade a wɔde toto ho .

Nsɔano ne tensile ahoɔden ho hia kɛse wɔ asaawa a ɛfata a wɔbɛkyerɛ mu.

l unf threads : Ma tensile ahoɔden a eye esiane wɔn pitch a ɛyɛ fɛ nti, ma kwan ma nkitahodi a emu yɛ den na ɛyɛ den.

L UNC Threads : Wɔn coarser pitch no ma ɛnyɛ nea ɛfata ma ahwehwɛde a ahoɔden wom, nanso ɛda so ara yɛ nea etu mpɔn kɛse ma applications pii.

Pitch ne thread density ntotoho .

Nhama a ɛyɛ den wɔ nsateakwaa biara mu no yɛ ade titiriw a ɛma ɛyɛ adwuma.

l unf threads : Thread density a ɛkorɔn kyerɛ asaawa a ɛyɛ fɛ, a ɛde fitting a ɛyɛ den na ɛyɛ pɛpɛɛpɛ ba.

L UNC threads : Fa thread density a ɛwɔ asaawa a ɛyɛ mmerɛw ase, a ɛyɛ mmerɛw sɛ wobedi ho dwuma na wɔayɛ, titiriw wɔ dodow kɛse mu.

Chart a wɔde kyerɛw nsɛm .

Fa no sɛ ɛyɛ screw thread chart . Saa nhyehyɛe yi bɛkyerɛ sɛnea UNF nhama no ayɛ ma a nhama dodow a ɛkɔ soro wɔ nsateakwaa biara mu, bere a UNC nhama no wɔ ntam kwan a ɛtrɛw wɔ nhama ntam.

UNF ne UNC nhama a wɔpaw no boaboa ano kɔ application no ahiade pɔtee so. UNF nhama, a ɛwɔ ne nnyigyei pa no, ma ahoɔden ne pɛpɛɛpɛyɛ a ɛkorɔn, a eye ma mfiridwuma a ɛkorɔn ne nea ɛwɔ adwennwen a ɛkorɔn. UNC nhama no, ɔkwan foforo so no, ɛma ɛyɛ mmerɛw sɛ wɔde bedi dwuma na wɔayɛ, na ɛma ɛfata ma adansi ne nneɛma a wɔyɛ no nyinaa wɔ baabi a pɛpɛɛpɛyɛ a ɛkɔ soro no nyɛ nea ɛho hia kɛse. Ahorow abien no nyinaa wɔ mfaso soronko, na ɛma ɛho hia wɔ wɔn dwumadie mu.

UNF ne UNC nhama a wɔsusu na wohu .

Nnwinnade a wɔde susuw nhama .

Nneɛma a edi kan a edi kan, sɛ wobɛsusuw nhama no pɛpɛɛpɛ a, wuhia nnwinnade a ɛfata. Nea ɛtaa ba ne:

L Calipers : Saa nnwinnade yi susuw asaawa bi akyi ntwemu. Wɔte sɛ sodifo a wɔn ho yɛ fɛ a wobetumi akyerɛ wo sɛnea asaawa kɛse te ankasa.

L Thread Gauges : Eyinom te sɛ template ahorow ma threads. Wo ne asaawa no hyia wɔ gauge no ho na woahu ne kɛse ne ne nnyigyei.

anammɔn anammɔn akwankyerɛ a ɛfa UNF ne UNC nhama a wobɛkyerɛ ho .

Sɛ́ wobɛkyerɛ sɛ ebia asaawa bi yɛ UNF anaa UNC no yɛ tẽẽ wɔ anammɔn ahorow yi ho:

1. Susuw ntwemu : fa calipers susuw asaawa no akyi ntwemu. Eyi kyerɛ wo sɛnea ɛtrɛw fa.

2. Kan nhama no : Kan nhama dodow no wɔ nsateakwaa biako tenten mu. Eyi ne baabi a wuhu nsonsonoe no – UNF nhama no benya nhama pii wɔ inch biara mu sen UNC.

3. Fa asaawa gauge di dwuma : Fa asaawa no hyia asaawa gauge. gauge no bɛsi pitch no so dua na sɛ ɛyɛ unf (fine) anaa unc (coarse).

4. Hwɛ chart no mu : Wubetumi ahwɛ screw thread chart bi so  ama woanya ntotoho ntɛmntɛm. Saa nhyehyɛe yi kyerɛ UNF ne UNC nhama nyinaa a ɛwɔ wɔn mu biara nnyigyei ne ne kɛse.

Afotusɛm a ɛbɛma wɔatumi asusuw nneɛma pɛpɛɛpɛ .

Nsusuwii ahorow a wobenya no yiye no ho hia yiye. Afotusɛm bi ni:

l Hohoro nhama no ho : Ansa na wobesusuw no, hwɛ hu sɛ nhama no ho tew. efĩ betumi asɛe wo susuw.

l Sua mpɛn pii : Sɛnea ɛbɛyɛ a wobɛkwati mfomso, susuw mpɛn abien na fa sɛnea wɔkyekyem pɛpɛɛpɛ.

l Fa nnwinnade pa di dwuma : Fa sika hyɛ calipers a ɛyɛ papa ne gauges mu ma susudua a ɛyɛ pɛpɛɛpɛ.

l Stay steady : Sɛ woresusuw a, kura wo nnwinnade mu ma ɛnyɛ pintinn na amma woanhwe ase na woanya akenkan a ɛnteɛ.

Sɛ woreyɛ adwuma bi ho adwuma a, sɛ wunim sɛ wode UNF anaa UNC nhama bedi dwuma a, ebetumi ama w’adwuma ayɛ anaasɛ asɛe. Saa nhama yi a wobɛsusuw na woahu no yiye no hwɛ hu sɛ nneɛma a wode kyekyere nneɛma no  bɛfata yiye, sɛ́ ebia woresi dan mu nneɛma, woresiesie kar, anaasɛ woreboaboa ahunmu nneɛma ano mpo. Nsusuwii pa ma nkitahodi a emu yɛ den, ɛyɛ den, na ahobammɔ wom ba wɔ biribiara a wobɔ anaa wusiesie mu.

Nneɛma a wɔde di dwuma a mfaso wɔ so ne nnwuma mu nhumu .

UNF threads wɔ pɛpɛɛpɛyɛ mu nsakrae ne fixations .

UNF (Unified National Fine) nhama no te sɛ pɛpɛɛpɛ ho abenfo wɔ nhama wiase no mu. Ɛha na wɔda nsow ankasa:

l Ahunmu ne Wimhyɛn : Wɔ wimhyɛn ne ahunmu hyɛn mu no, ɛsɛ sɛ ɔfã ketewaa biara yɛ pɛpɛɛpɛ. Wɔde UNF nhama di dwuma wɔ engine afã horow  ne nipadua nhyehyɛe mu  ma ɛyɛ pɛpɛɛpɛ.

l Automotive Manufacturing : Wɔ kar ahorow mu, titiriw wɔ afã horow a ɛyɛ mmerɛw te sɛ ɛlɛtrɔnik nneɛma mu no, UNF nhama ma ɛfata pɛpɛɛpɛ a ehia.

l Electronic Equipment : Wɔ gadgets ne devices ho, baabi a milimita biara counts, UNF threads ho hia ma wɔn pɛpɛɛpɛyɛ  ne tight connection ..

UNC nhama a ɛwɔ mass a wɔyɛ no mu a wɔde fasteners yɛ .

Sɛ ɛba sɛ wɔbɛyɛ fasteners pii ntɛmntɛm na wɔayɛ no yiye a, UNC (Unified National Coarse) threads yɛ kɔ-kɔ:

l Adansi : Wɔ adan ne nnwuma mu no, wɔde UNC nhama di dwuma wɔ bolt  ne nkɔnsɔnkɔnsɔn mu  sɛnea ɛbɛyɛ a ɛbɛyɛ den na ɛnyɛ den sɛ wɔde bedi dwuma.

l General Machinery : Wɔ mfiri a ɛhia fasteners a ɛyɛ den na wotumi de ho to so no, UNC nhama ma ahoɔden a ɛkari pɛ ne sɛnea ɛyɛ mmerɛw sɛ wobedi ho dwuma.

Nnwumayɛbea pɔtee bi a wɔde di dwuma ho nsɛm ma UNF ne UNC nhama .

Asaawa biara wɔ n’ankasa tumi akɛse ma nnwuma ahorow:

L UNF Threads : Wɔ precision instruments  ne aerospace , baabi a biribiara ho hia no, UNF threads ho hia ma wɔn ahoɔden  ne pɛpɛɛpɛyɛ ..

L UNC Threads : Wɔ nnwuma te sɛ adansi ne mfiri a emu yɛ duru mu, baabi a ɛsɛ sɛ fasteners yɛ den na wotumi de ho to so no, UNC nhama ne nea wɔpɛ.

Nsɛnnennen a ɛwɔ mfiridwuma ne nhyiam ase .

Ɛnyɛ bere nyinaa na ɛyɛ mmerɛw sɛ wode nhama bɛyɛ adwuma. Nsɛnnennen bi ni:

l Pɛpɛɛpɛ wɔ mfiridwuma mu : UNF nhama a wɔyɛ no hwehwɛ sɛ wɔyɛ pɛpɛɛpɛ wɔ CNC mfiridwuma mu . Mfomso ketewaa bi betumi ama nsonsonoe kɛse aba.

l Handling and Assembly : UNC threads, sɛ ɛyɛ coarser, yɛ mmerɛw sɛ wobedi ho dwuma nanso ɛsɛ sɛ wɔde ahwɛyiye yɛ mfiri de hwɛ hu sɛ ɛbɛfata yiye wɔ rougher applications mu.

l Nneɛma a wɔpaw : Nneɛma a wɔpaw ma UNF ne UNC nhama nyinaa no ho hia yiye. Ɛka asaawa no ahoɔden , a ɛyɛ den , ne adwennwen a ɛko  tia.

Sɛ́ ɛyɛ UNF nhama a wɔde di dwuma pɛpɛɛpɛ a wɔhwehwɛ wɔ ahunmu  ne ɛlɛtrɔnik nneɛma mu  anaasɛ UNC nhama a ɛyɛ den wɔ adansi ne mfiri mu no, abien no nyinaa di dwuma titiriw wɔ wɔn mfuw mu. Wɔn dwumadie pɔtee ne nsɛnnennen a wɔbɛte aseɛ no boa ma wɔpaw asaawa a ɛfata  ma dwumadie soronko biara, na ɛhwɛ ma adeɛ a ɛtwa toɔ no yɛ adwuma yie na ɛyɛ ahobanbɔ.

Sɛ wopaw thread type a ɛfata .

Nneɛma a ɛsɛ sɛ wususuw ho bere a worepaw UNC ne UNF ntam .

Sɛ wopaw thread type a ɛfata – UNC anaa UNF – a, ɛho hia. Nea ɛsɛ sɛ wususuw ho ni:

1. Application needs : So woreyɛ adwuma wɔ biribi a ehia sɛ wɔyɛ no pɛpɛɛpɛ so, te sɛ wimhyɛn fã ? Kɔ UNF. Wɔ general construction ho no, UNC ne wo bet a eye sen biara.

2. Ahoɔden a wɔhwehwɛ : UNF nhama ma ahoɔden pii esiane wɔn nnyigyei pa nti, na ɛma ɛyɛ papa ma adwennwen a ɛkorɔn.

3. Assembly Environment : Sɛ nneɛma a atwa yɛn ho ahyia no taa yɛ efĩ anaasɛ ɛsɛe a, UNC nhama a ɛyɛ mmerɛw no de bɔne fafiri kɛse.

4. Nneɛma a wɔyɛ : So wowɔ nnwinnade a wode bɛyɛ UNF threading pɛpɛɛpɛ? Sɛ ɛnte saa a, UNC betumi ayɛ nea mfaso wɔ so kɛse.

Nnwumayɛbea gyinapɛn ne nhyiam ahorow .

Nnwuma biara wɔ nea ɔpɛ:

l Aerospace : Wɔtaa de UNF di dwuma ma ne pɛpɛɛpɛyɛ  ne ahoɔden a ɛkorɔn ..

l Construction : UNC na wɔpɛ sɛ ɛyɛ den na ɛnyɛ den sɛ wɔde bedi dwuma.

l Automotive : Abien nyinaa a wɔadi afra, a egyina ɔfã a wɔreyɛ so.

Thread ahorow a ɛne ne ho hyia a ɛwɔ bolts ne nuts .

Sɛ́ wubenya pairing no yiye no yɛ ade titiriw:

l Hwɛ sɛ ɛne ne ho hyia : Bere biara hwɛ hu sɛ bolt no thread type ne nut no hyia. UNF bolt hia UNF nut.

l Hwɛ screw thread chart : saa chart yi boa wɔ threads a ɛne no hyia mu pɛpɛɛpɛ, a ɛkyerɛ pitch  ne thread density ..

l Susuw nneɛma ho : Ɛsɛ sɛ bolt ne nut no mu nneɛma no hyia ma nkitahodi a emu yɛ den ..

Wɔ nneyɛe mu .

Momma yɛnka sɛ woreboaboa ɛlɛtrɔnik mfiri bi ano. Ɛda adi sɛ wobɛpaw UNF nhama ama wɔn nne a ɛyɛ fɛ  ne nea ɛyɛ pɛpɛɛpɛ . Ɔkwan foforo so no, sɛ woreyɛ nhomakorabea a, UNC nhama no bɛyɛ nea ɛfata kɛse ma wɔn ahoɔden ne sɛnea ɛyɛ mmerɛw sɛ wobedi ho dwuma.

UNC ne UNF nhama ntam a wobɛpaw no ba fam sɛ wobɛte ahwehwɛde pɔtee a ɛwɔ wo dwumadi no mu, nnwumayɛbea gyinapɛn ahorow, ne hwɛ a wobɛhwɛ sɛ nneɛma a ɛka ho nyinaa hyia. Sɛ́ ɛyɛ nnwinnade a ɛyɛ pɛpɛɛpɛ a ɛyɛ mmerɛw anaasɛ adansi nneɛma a ɛyɛ den no, asaawa a ɛfata no hwɛ ma a ɛyɛ den , ahoɔden , ne wo nhyiam no nyinaa di yiye.

Awie

Bere a yɛrewie no, momma yɛnkae UNF ne UNC nhama no dwumadi atitiriw wɔ nnwuma ahorow mu. Saa nhama yi, ɛmfa ho sɛ ɛte sɛ nea ɛte sɛ nea ɛte no, yɛ ade titiriw wɔ ahobammɔ, pɛpɛɛpɛyɛ, ne dwumadi a enni ano a wɔde di dwuma no mu.

Recap a ɛkyerɛ hia a UNF ne UNC nhama ho hia wɔ nnwuma mu .

l unf threads : wɔn pitch pa no ma wɔyɛ papa ma high precision ne ahoɔden-ahwehwɛ applications te sɛ wɔ ahunmu , precision instruments , ne automotive manufacturing ..

L UNC Threads : Wonim no sɛ ɛyɛ mmerɛw, saa nhama yi ho hia wɔ adansi, mfiri a emu yɛ duru, ne nneɛma a wɔyɛ no da biara da mu ma ɛyɛ mmerɛw sɛ wɔde bedi dwuma na ɛyɛ den.

Nsusuwii a etwa to wɔ thread type a ɛfata a wobɛpaw na wode adi dwuma ama application pɔtee bi ho .

Asaawa a ɛfata – UNF anaa UNC – ba fam ba:

l Application no ho nteaseɛ : Wo project no ahiadeɛ pɔtee, sɛ ɛyɛ pɛpɛɛpɛ anaa ahoɔden a ɛkɔ soro no, bɛkyerɛ wo paw no kwan.

l Nnwumayɛbea Gyinapɛn : Sɛ obi hu nnwumayɛbea ahorow nhyiam ahorow a, ɛboa ma yɛpaw nea ɔpɛ.

l Compatibility : Hwɛ sɛ threads, bolts, ne nuts a wopaw no hyia no ho hia kɛse ma nhyiam a edi mu.

Ebia na nhama no sua, nanso wɔn nkɛntɛnso no yɛ kɛse. Efi wimhyɛn a ɛrekɔ soro wɔ yɛn atifi kosi ɛlɛtrɔnik mfiri a yɛde di dwuma da biara no so no, UNF ne UNC nhama no kura yɛn wiase no mu. Enti bere foforo a woreyɛ adwuma bi ho adwuma no, fa adwene bi ma saa akokodurufo nketewa yi. UNF ne UNC ntam a wopaw no betumi ama nsonsonoe no nyinaa aba w’abɔde mu ahoɔden, pɛpɛɛpɛyɛ, ne nkwa tenten mu.

FAQ .

Asɛmmisa:  Nsonsonoe bɛn na ɛwɔ UNF ne UNC nhama ntam?

A:  UNF nhama no yɛ fɛ yiye; UNC nhama no yɛ coarser. UNF wɔ nhama pii wɔ nsateakwaa biara mu. UNC taa yɛ nea wɔtaa de di dwuma wɔ ɔkwan a ɛkɔ akyiri so.

Q:  Bere bɛn na ɛsɛ sɛ mede UNF threads di dwuma wɔ UNC threads so?

A:  Fa UNF di dwuma ma nhyɛso ne nsakrae a ɛyɛ fɛ yiye. UNF na wɔpɛ wɔ applications a ɛhwehwɛ sɛ wɔyɛ pɛpɛɛpɛ.

Asɛmmisa:  Ɔkwan bɛn so na metumi asusuw asaawa a ɛwɔ UNF ne UNC nhama ho?

A:  Fa asaawa gauge kan nhama wɔ nsateakwaa biara mu. Susuw nhama ntam kwan a ɛda peak-to-peak ntam no ho. Fa toto gyinapɛn ahorow a wonim ho.

Asɛmmisa:  So UNF ne UNC nhama no yɛ nea wotumi sesa?

A:  Dabi, wɔwɔ thread pitch ahorow. Sɛ wɔsesa wɔn ho wɔn ho a, ebetumi asɛe ade. Bere nyinaa fa thread type a ɛfata no hyia.

Q:  Nnwinnadeɛ bɛn na ɛsɛ sɛ me ne UNF ne UNC threads yɛ adwuma?

A:  Wobehia tap ne wu, asaawa gauge, ne wrenches. Hwɛ sɛ nnwinnadeɛ ne thread type no hyia. Ebia ɛho behia nso sɛ wɔde srade gu mu.