Ɛnkyɛe koraa na mfiridwuma ho nimdefo bi bisaa me sɛ:
Wɔwɔ POM gear, na mfitiase validation nhyehyɛe no akɔ so yiye.
Wɔyɛɛ ɔsɛeɛ ho sɔhwɛ mmienu, na ɛdaa nsakraeɛ ketewa bi a ɛbaa nsusuiɛ mu adi ne ne soro tebea a ɛkyɛn so, na ɛsii so dua sɛ nneɛma no nkyerɛ ɔhaw biara a ɛho hia wɔ ɔsɛeɛ ho.
Nanso, wɔ nnansa yi mfiri-mfiri nkwa nna nyinaa sɔhwɛ ahorow a wɔyɛe bere a woduu bɛyɛ kyinhyia 200,000 akyi no, nhwɛsode pii fii ase daa sẽ a abubu adi wɔ mmeae a ɛyɛ nwonwa a ɛkɔ so daa.
Mprempren akyinnyegye bi wɔ mpɔtam hɔ: ebinom ka sɛ efi adwennwen a wɔde di dwuma ho, afoforo nso fi mfomso ahorow a ɛwɔ adansi nhyehyɛe mu, bere a afoforo nso susuw sɛ nsakrae wɔ nneɛma ahorow mu.
Ɔbisaa asɛm bi a ɛyɛ papa paa-.
Sɛ na nsɛm a wɔde yɛ nneɛma no wɔ nsɛmnsɛm ampa a, dɛn nti na sɔhwɛ a wɔadi kan ayɛ wɔ sɛnea wɔhyɛ ho no maa nea eye sen biara saa?
Eyi yɛ asɛm a abu so yiye ankasa, na akuw pii hwe ase wɔ mu.
Nea ɛtwe adwene si so ankasa no nyɛ parameter anomaly pɔtee bi, na mmom ɛyɛ adwene mu adwene a ɛnteɛ titiriw.
Dɛn nti na ade a ɛda sɛnea ɛko tia ɔsɛe a ɛkyɛn so adi no bɛyɛ nea ɛyɛ mmerɛw ankasa sɛ ɔbrɛ di nkogu wɔ wiase ankasa-wiase adwumayɛ tebea horow mu?
01
Nnipa pii nya "ɔhaw no su" no bɔne fi mfiase pɛɛ.
Sɛ nnipa dodow no ara hyia nkyerɛkyerɛmu a ɛne "low wear + subsequent fracture" a, nea edi kan a wɔyɛ ne sɛ wobehu nea ɛnteɛ no.
So saa nneɛma akuw yi ntumi nnyina? So nsɛm bi wɔ sɛnea wɔyɛ no ho? Anaasɛ so sɔhwɛ tebea horow no nhyia?
Nanso sɛ wobubu ɔhaw no a, wubehu ankasa sɛ...
Ne titiriw no, ɔbrɛ ne ɔbrɛ nyɛ nsɛmpɔw koro.
Ne titiriw no, ɔhyɛ yɛ ade a ɛkɔ so wɔ soro.
Wubetumi asusuw ho sɛ nneɛma no ani a wɔkɔ so "twitwa" na "wɔtwetwe".
Nneɛma bɛn na wohia na ama wɔatumi agyina saa adeyɛ yi ano?
Ɛnyɛ den: ɛyɛ den, ɛyɛ den, na ɛyɛ den sɛ wobɛtwa mu.
Citation: Adesua ne Su ahorow a ɛfa Abrasive Wear Mechanisms ho
Sɛnea wubetumi ahu no, nneɛma pii a ɛtumi nsɛe-no wɔ saa su ahorow yi:
Ahwehwɛ a ɛkorɔn
Modulus a ɛkorɔn
Ahoɔden a ɛba fam wɔ soro (a nneɛma a wɔde srade gu mu ka ho) .
Ɔkwan foforo so no, ntadehyɛ ho sɔhwɛ ahorow a edidi so yi:
So ɔfasu no betumi agyina abɔnten so nneɛma a asɛe no ano?
Nanso ɔbrɛ di ntease foforo koraa akyi.
Ɔbrɛ ba wɔ ade no mu na ɛyɛ adeyɛ a ɛboaboa ano.
Gear biara a wɔde hyɛ mu no yɛ kyinhyia ketewaa bi a wɔde kotow na wɔtrɛw mu titiriw.
Ɛyɛ papa sɛ wobɛhwɛ pɛnkoro, nanso ɔhaw no ne sɛ...
Wɔbɛsan ayɛ saa adeyɛ yi mpɛn ɔhaha pii anaa ɔpepem pii mpo
Dɛn na ɛkɔ so wɔ nsɛm no mu wɔ saa adeyɛ yi mu?
Molekyule nkɔnsɔnkɔnsɔn no trɛw mpɛn pii na ɛsan ba bio.
Deformation a wontumi nsakra no ba wɔ mmeae a ɛwɔ mpɔtam hɔ.
Mfomso ahorow a ɛwɔ microscopic mu no yɛ kɛse nkakrankakra ma ɛbɛyɛ mpaapaemu.
Mfiase no, worenhu nsakrae biara.
Nanso bere a mpaapaemu no nyin kodu kɛse pɔtee bi a ɛho hia-.
Macro a ɛda adi ne: mpaapaemu mpofirim.
Enti, asɛm titiriw no nyɛ "nea enti a ɛbubui," na mmom:
"Wear testing" a wɔde bedi dwuma de asusuw "ɔbrɛ-dominated" adwumayɛ tebea ho fi mfiase no nyɛ nea ɛfata titiriw.
02
Dɛn nti na "improved wear resistance" de ɔbrɛ a ɛtaa di nkogu ba ankasa?
Sɛ wokyekyɛ nsɛmpɔw no mu yiye wie a, wubehu adeyɛ bi a ɛne nkate nhyia nanso abu so kɛse wɔ nsɛm a ɛma nkontabuo a ɛkorɔn-mu:
Akwan pii a wɔfa so ma sɛnea ɛko tia ɔbrɛ no tu mpɔn titiriw no ma ade no a ɛko tia ɔbrɛ no yɛ basaa.
Eyi nyɛ nea ɛbae ara kwa; ɛnam nhyehyɛe so na ɛkyerɛ.
1. Dodow a crystallinity no kɔ soro no, dodow no ara na nkɔnsɔnkɔnsɔn no afã horow no ntumi nkɔ baabiara.
Dɛn nti na nneɛma te sɛ POM, PBT, ne PET da ahoɔden a ɛkyɛn so adi?
Wɔahyehyɛ molecule nkɔnsɔnkɔnsɔn no wɔ nhyehyɛe a ɛyɛ den yiye na wɔakyerɛkyerɛ mu yiye mu.
Ɛyɛ den yiye ma abɔntenfo sɛ wɔbɛhyɛn saa tebea no mu.
Nanso ɛhɔ na ɔhaw no da.
Sɛ wɔde nhyɛso ba bere ne bere mu a, ɛsɛ sɛ asɛm no yɛ adwuma biako:
Ahoɔden nam molecule nkɔnsɔnkɔnsɔn a ɛkɔ baabiara a ɛyɛ ketewaa bi so na ɛba.
Nanso, asɛm a ɛfa -crystallinity nhyehyɛe a ɛkorɔn no ho ne:
Wɔakyekyere ɔfã no.
Free volume yɛ ketewaa bi.
Ɛkame ayɛ sɛ buffer space biara nni mpɔtam hɔ
Nea afi mu aba ne sɛ:
Sɛ wɔde abɔnten tumi di dwuma a, baabiara nni hɔ a ɛbɛpete-enti ɛde ne ho hyɛ nkɔnsɔnkɔnsɔn no afã pɔtee bi nkutoo mu-na awiei koraa no ɛma nkɔnsɔnkɔnsɔn titiriw no bubu.
2. Mpɛn pii no, nea wɔde hyɛ mu no ma ɔhaw no mu yɛ den.
Mfiridwumayɛfo pii a wɔyɛ nnuru a wɔde yɛ nnuru no gye di wɔ nkate mu sɛ:
Sɛ wopɛ sɛ wo ho yɛ den a → Fa hardening filler ka ho
Sɛ nhwɛso no, fiberglass, carbon fiber, ne powder a ɛnyɛ abɔde mu nneɛma.
Wɔ bere tiaa mu no, ɔkwan yi yɛ nea ɛfata:
N’anim yɛ den sen saa
Enhanced scratch ahoɔden a ɛko tia
Nanso dɛn na ɛto saa nneɛma yi wɔ ɔbrɛ tebea horow mu?
adwennwen a ɛma obi nya adwennwen
Nea enti a ɛte saa no yɛ tiawa:
Resin yɛ "deformable".
Filler no yɛ "titiriw no ɛnyɛ-deformable".
Wɔ adesoa a wɔde di dwuma mpɛn pii ase no, ntamgyinafo a ɛda nneɛma abien no ntam no nya shear stress kɛse.
Dɛn na ɛba bere a bere kɔ so no?
Nkitahodi mu delamination
Yɛ microholes a wɔde yɛ nneɛma nketenkete
Mpaapaemu no fi ase trɛw fi nea wɔde ahyɛ mu no ano.
Awiei koraa no, nea wuhu wɔ abubuw no ani no nyɛ abubuw a ɛyɛ pɛ.
Mmom no, ɛyɛ ɔbrɛ mu mpaapaemu a ɛtaa ba a ɛba ne mu.
Sɛ yɛbɛbɔ ɔfã yi mua a, yebetumi abɔ mua wɔ kasamu biako mu:
Wo de asi w'ani so sɛ wobɛma ade no "ayɛ nea ɛyɛ den sɛ ɛbɛtwetwe-" na "ɛyɛ den," nanso ɔbrɛ a ɛko tia no hwehwɛ pɛpɛɛpɛ sɛ ɛyɛ "nea ɛyɛ nnam na etumi sɛe ahoɔden."
03
Ɔkwan bɛn so na wobetumi asiesie abirabɔ yi afi mfiridwuma mu?
Sɛ wɔreyɛ nneɛma te sɛ gear, bearing, anaa sliding joints a, adetɔfo ahwehwɛde taa yɛ tẽẽ:
Ɛnsɛ sɛ wɔsɛe no na wɔbubu!
Enti ɔhaw no ni:
Yɛbɛyɛ dɛn atumi akari pɛ wɔ "rigidity" ne "resilience" ntam?
Ɔkwan 1: Sɛ́ anka wobɛma ɛyɛ den nkutoo no, di kan fa w’adwene si akasakasa a wobɛtew so.
Sɛ wode w'adwene nyinaa si wo mmɔdenbɔ nyinaa so sɛ "sɛ wobɛma nneɛma no atumi agyina ntwitwiridii ano atu mpɔn" a, .
Ɛnyɛ den sɛ wobɛkyerɛ nhyehyɛe no kwan akɔ ɔkwan a "ɛyɛ den kɛse → ɔbrɛ a ɛba fam" so.
Sɔ ɔkwan foforo so hwɛ:
Sɛ́ anka wobɛko atia friction tẽẽ no, tew friction no so.
Ɔkwan bɛn so ankasa na ɛsɛ sɛ wɔyɛ eyi?
Fa silicone-gyinaso srade fa ka ho
Fa ultra-molekyul mu duru a ɛkorɔn PE micro-powder ka ho
Wɔreyɛ nhyehyɛe a wɔde sra wɔn ankasa-srade
Nneɛma yi su ahorow ne:
✔ Ɛnma modulus no nkɔ soro kɛse
✔ Nanso, ebetumi ayɛ low shear layer wɔ soro
Nea afi mu aba ne sɛ:
Abɔnten tumi no fã bi "wɔhwe ase" sen sɛ "wɔtwa mu".
Ɔbrɛ a ɔbrɛ de ba no nyɛ nea ɛho hia kɛse.
Ɔkwan 2: Yɛ "ahoɔden a wɔde di dwuma nhyehyɛe" sen sɛ wode wo ho bɛto ade biako so
Eyi ne baabi pɔtee a adwumayɛbea ahorow pii a wɔyɛ nsakrae da wɔn mfiridwuma ho nimdeɛ ankasa adi.
Core no nyɛ "更强," na mmom:
Ma baabi a ɛwɔ ade no mu ma ahoɔden a ɛbɛsɛe.
Ɔkwan a wɔtaa fa so yɛ ne sɛ:
Sɛ́ alloy nhyehyɛe, sɛ nhwɛso no POM/TPU
POM ma rigidity ne wear resistance.
TPU ma elasticity ne ahoɔden a wɔsɛe no.
Sɛ mpaapaemu no trɛw a:
Sɛ wohyia flexible phase no pɛ a...
Ahoɔden no twetwe.
Wɔayɛ mpaapaemu no pasivated anaasɛ mpo wɔagyae.
Ebia wode ahoɔden kakraa bi a ɛko tia ɔsɛe bɛbɔ afɔre.
Nanso, eyi maa nkwa nna kɔɔ soro kɛse esiane ɔbrɛ nti.
Ɔkwan 3: Sɛ sikasɛm nhyehyɛe no ma kwan a, fa nneɛma a wɔahyehyɛ no yiye di dwuma tẽẽ.
Nneɛma bi fi awosu mu nam wɔn molecule nhyehyɛe so siesie abirabɔ yi.
sɛ nhwɛso no, PEEK.
Nea ɛkyerɛkyerɛ mu no nyɛ "asɛnkyerɛnne biako a ɛyɛ nea ɛboro so titiriw."
Mmom no, ɛwɔ nhyehyɛe mu su ahorow a edidi so yi bere koro mu:
Nneɛma a ɛyɛ den (nkaa a ɛyɛ huam, ketone akuw) .
Nkitahodi a ɛyɛ mmerɛw (ether nkitahodi) .
Nea afi mu aba ne sɛ:
Ne nyinaa yɛ den na ɛyɛ den{0}}resistant
nso da segmental mobility bi adi
Enti wubehu sɛ:
Nneɛma pii a ɛyɛ nnam a ɛkorɔn-awiei (a wɔde di dwuma wɔ wimhyɛn ne aduruyɛ mu), .
Awiei koraa no, bere a yɛatwa yɛn ho akɔ akyi no, yɛsan kɔ saa nneɛma yi so.
Ɛnyɛ sɛ ne bo yɛ den nti, na mmom esiane sɛ:
Ɛyɛ den sɛ wɔbɛtua "nhyehyɛe mu sintɔ ahorow" a ɛwɔ nneɛma a ne bo nyɛ den mu no ho ka koraa denam nea wɔyɛ nkutoo so.
Asɛm titiriw a ɛwɔ ɔhaw a ɛte sɛɛ ho no nyɛ "nneɛma a ɛnteɛ a wɔde bedi dwuma," na mmom:
Wɔde nhwehwɛmu nhyehyɛe no dii dwuma wɔ ɔkwan a ɛnteɛ so.
Wear yɛ ahoɔden nkitahodi a ɛda nneɛma a ɛwɔ soro ntam.
Ɔbrɛ yɛ ahoɔden a ɛwɔ nipadua no mu a ɛboaboa ano.
Sɛ wode w’adwene si metric biako a wobɛma ayɛ papa wɔ TDS mu nkutoo so a, .
Ɛnyɛ den sɛ wubedu pɛyɛ ho wɔ ɔfã biako mu bere a wobɛhwere wo tumi koraa wɔ ɔfã foforo mu no.
Mfiridwumayɛfo a wɔn ho akokwa ankasa mfa wɔn adwene nsi "optimizing a single metric" so; mmom no, wɔde asi wɔn ani so sɛ:
Hwehwɛ kari pɛ wɔ rigidity, toughness, friction, ne ahoɔden a wɔsɛe no ntam a ɛhwɛ ma ɛyɛ adwuma bere tenten-.
Sɛ woahyia eyi pɛn a:
Sɔhwɛ a edi kan no kɔɔ so yiye; nanso, nsɛmnsɛm sɔree wɔ bere tenten a aduru no bɛtra ase bere a wɔde adi dwuma pɛn no ho.
Titiriw saa biako- no.
Tebea a "ɛkame ayɛ sɛ na enhia sɛ wɔyam, nanso ɛda so ara bubui."
Ɛda adi kɛse sɛ eyi nyɛ nea ɛbae ara kwa, na mmom ɛyɛ huammɔdi a ɛtaa ba a ɔbrɛ-de ba.
Hwɛ abubuo no yie wɔ microscope ase-mmuaeɛ no taa wɔ hɔ dedaw.