Yawancin sassa nasabon makamashi rage kayakumakayan aikin motaaikin yana buƙatar harbin peening bayan kayan niƙa, wanda zai lalata ingancin haƙori, har ma yana shafar aikin NVH na tsarin. Wannan takarda tana nazarin yanayin haƙori daban-daban na yanayin aiwatar da harbe-harbe da sassa daban-daban kafin da bayan harbin harbi. Sakamakon ya nuna cewa harbi peening zai ƙara haƙori surface roughness, wanda ya shafi halaye na sassa, harbi peening tsari sigogi da sauran dalilai; A ƙarƙashin yanayin tsarin samar da tsari na yanzu, matsakaicin ƙarancin haƙori bayan harbin harbi shine sau 3.1 kafin harbi peening. An tattauna tasirin haƙoran haƙora akan aikin NVH, kuma ana ba da shawarar matakan inganta rashin ƙarfi bayan harbin harbi.

Ƙarƙashin bayanan da ke sama, wannan takarda ta tattauna daga abubuwa uku masu zuwa:

Tasirin sigogin aiwatar da harbe-harbe akan haƙoran haƙora;

A karawa mataki na harbi peening a kan hakori surface roughness a karkashin data kasance tsari tsari yanayi;

Tasirin ƙarar haƙoran haƙora akan aikin NVH da matakan inganta rashin ƙarfi bayan harbin harbi.

Shot leƙen asiri yana nufin tsarin da yawa kananan projectiles tare da babban taurin da high-gudun motsi buga saman sassa. Ƙarƙashin tasiri mai sauri na ƙaddamarwa, saman ɓangaren ɓangaren zai haifar da ramuka kuma lalata filastik zai faru. Ƙungiyoyin da ke kewaye da ramukan za su yi tsayayya da wannan nakasar kuma su haifar da damuwa na damuwa. Haɗin ramuka da yawa zai samar da wani nau'i na nau'i na matsawa na matsa lamba a saman sashin, don haka inganta ƙarfin gajiyar sashin. Dangane da hanyar samun babban gudu ta hanyar harbi, harbin harbi gabaɗaya ya kasu zuwa matsewar harbin iska da peening harbi na tsakiya, kamar yadda aka nuna a hoto na 1.

Matsewar harbin iska yana ɗaukar iska mai matsewa azaman ikon fesa harbin daga bindiga; Harbin Centrifugal yana amfani da mota don fitar da abin motsa jiki don jujjuya da babban gudu don jefa harbin. Maɓalli na maɓalli na tsari na harbin harbi sun haɗa da ƙarfin jikewa, ɗaukar hoto da kaddarorin peening matsakaici (kayan abu, girman, siffa, taurin). Ƙarfin jikewa siga ne don siffanta ƙarfin pening harbi, wanda aka bayyana da tsayin baka (watau matakin lanƙwasawa na guntun gwajin Almen bayan harbin harbi); Adadin ɗaukar hoto yana nufin rabon yankin da ramin ya rufe bayan harbin leƙen asiri zuwa jimillar yankin da aka harbe harbe; Kafofin watsa labaru na harbi da aka fi amfani da su sun haɗa da harbin yankan ƙarfe na ƙarfe, harbin karfen simintin ƙarfe, harbin yumbu, harbin gilashi, da sauransu. Girman, siffar da taurin kafofin watsa labarai na harbi daban-daban. Ana nuna buƙatun tsarin gaba ɗaya don sassan shaft ɗin watsawa a cikin Tebur 1.

Sashin gwajin shine matsakaicin shaft gear 1/6 na aikin matasan. The gear tsarin da aka nuna a cikin Hoto 2. Bayan nika, da hakori surface microstructure ne Grade 2, da surface taurin ne 710HV30, da tasiri hardening Layer zurfin ne 0.65mm, duk a cikin fasaha bukatun. Ana nuna rashin lafiyar haƙora kafin a harbe shi a cikin Tebura na 3, kuma ana nuna daidaiton bayanan haƙorin a cikin Tebura 4. Ana iya ganin cewa haƙoran haƙora kafin a harbe su yana da kyau, kuma lanƙwan bayanin haƙorin yana da santsi.

Tsarin gwaji da sigogin gwaji

Ana amfani da na'ura mai jujjuya harbin iska a cikin gwajin. Saboda yanayin gwajin, ba shi yiwuwa a tabbatar da tasirin harbin matsakaicin kaddarorin (kayan abu, girman, taurin). Saboda haka, kaddarorin harbin peening matsakaici ne akai a cikin gwajin. Tasirin ƙarfin jikewa da ɗaukar hoto kawai a kan tarkacen haƙori bayan harbin harbi ya tabbata. Dubi Table 2 don tsarin gwaji. Ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun sigogi na gwaji shine kamar haka: zana madaidaicin jikewa (Hoto 3) ta hanyar gwajin coupon Almen don ƙayyade ma'anar jikewa, don kulle matsa lamba na iska, ƙarfin harbin karfe, saurin motsi na bututun ƙarfe, nisan bututun ƙarfe daga sassa. da sauran sigogin kayan aiki.

sakamakon gwaji

Ana nuna bayanan raunin haƙori bayan an harbe harbe a cikin Table 3, kuma ana nuna daidaiton bayanan haƙori a cikin Tebu 4. Ana iya ganin cewa a ƙarƙashin yanayin peening na harbi huɗu, ƙarancin saman haƙori yana ƙaruwa kuma madaidaicin bayanan haƙori ya zama mai ɗorewa. convex bayan harbin leƙen asiri. Ana amfani da rabon roughness bayan fesa zuwa roughness kafin a fesa don kwatanta girman girman girman (Table 3). Ana iya ganin cewa girman girman girman ya bambanta a ƙarƙashin yanayin tsari guda huɗu.

Bibiyar Batch na Girman Tsarin Haƙori ta Ƙarfafa Haƙori ta Shot Peening

Sakamakon gwaji a Sashe na 3 ya nuna cewa rashin lafiyar haƙori yana ƙaruwa da digiri daban-daban bayan harbe-harbe tare da matakai daban-daban. Domin cikakken fahimtar ƙarar harbin peening a kan haƙoran haƙora da haɓaka adadin samfuran, abubuwa 5, nau'ikan 5 da sassa 44 gabaɗaya, an zaɓi su don bin diddigin rashin ƙarfi kafin da bayan harbin peening a ƙarƙashin yanayin harbin tsari. tsarin peening. Dubi Tebu na 5 don bayanan jiki da sinadarai da bayanan tsarin harbe-harbe na sassan da aka sa ido bayan niƙa kayan aiki. Roughness da girma bayanai na gaba da raya hakori saman kafin harbi peening ana nuna su a cikin siffa 4. Hoto na 4 ya nuna cewa kewayon haƙori surface roughness kafin harbi peening ne Rz1.6 μ m-Rz4.3 μ m ； Bayan harbi peening, roughness yana ƙaruwa, kuma kewayon rarraba shine Rz2.3 μ m-Rz6.7 μ m; Za'a iya ƙara girman girman kai zuwa 3.1 sau kafin harbi peening.

Tasirin abubuwan da ke haifar da rashin ƙarfi na haƙori bayan harbin harbi

Ana iya gani daga ka'idar harbin peening cewa babban taurin da harbin motsi mai sauri ya bar ramuka marasa adadi a saman sashin, wanda shine tushen saura matsawa. A lokaci guda kuma, waɗannan ramukan suna daure don ƙara ƙarancin ƙasa. Halayen sassan kafin harbe-harbe da sigogin tsari na harbe-harbe za su shafi rashin ƙarfi bayan harbi peening, kamar yadda aka jera a cikin Tebura 6. A cikin Sashe na 3 na wannan takarda, ƙarƙashin yanayin tsari guda huɗu, ƙarancin haƙori bayan harbi peening yana ƙaruwa zuwa digiri daban-daban. A cikin wannan gwajin, akwai masu canji guda biyu, wato, pre harbi roughness da tsarin sigogi (ƙarfin jikewa ko ɗaukar hoto), wanda ba zai iya tantance alakar da ke tsakanin bayan harbin peening roughness da kowane guda tasiri factor. A halin yanzu, masana da yawa sun yi bincike a kan wannan, kuma sun gabatar da samfurin hasashen hasashen yanayi bayan harbin leƙen asiri bisa ƙayyadaddun simulation, wanda ake amfani da shi don hango madaidaicin ƙimar ƙima na matakai daban-daban na harbi.

Dangane da ainihin gogewa da kuma binciken wasu masana, ana iya yin hasashe hanyoyin tasirin abubuwa daban-daban kamar yadda aka nuna a cikin Table 6. Ana iya ganin cewa taurin bayan harbin harbe-harbe yana shafar abubuwa da yawa, waɗanda kuma sune mahimman abubuwan. yana shafar saura matsa lamba. Domin a rage roughness bayan harbi leƙen asiri a kan jigo na tabbatar da saura matsawa danniya, babban adadin tsari gwaje-gwaje da ake bukata domin ci gaba da inganta siga hade.

Tasirin raunin haƙori akan aikin NVH na tsarin

Sassan Gear suna cikin tsarin watsawa mai ƙarfi, kuma ƙarancin haƙori zai shafi aikin NVH ɗin su. Sakamakon gwaji ya nuna cewa a ƙarƙashin nauyin da sauri da sauri, mafi girman girman yanayin, mafi girma da rawar jiki da amo na tsarin; Lokacin da kaya da sauri suka karu, girgiza da hayaniya suna karuwa sosai a fili.

A cikin 'yan shekarun nan, ayyukan sababbin masu rage makamashi sun karu da sauri, kuma suna nuna ci gaban ci gaba na saurin gudu da babban karfin wuta. A halin yanzu, matsakaicin ƙarfin ƙarfin sabon makamashin mu shine 354N · m, kuma matsakaicin gudun shine 16000r / min, wanda za a ƙara zuwa fiye da 20000r / min a nan gaba. A karkashin irin wannan yanayin aiki, dole ne a yi la'akari da tasirin haɓakar haɓakar haƙori akan aikin NVH na tsarin.

Matakan haɓakawa don ƙaƙƙarfan haƙori bayan harbin harbi

The harbi peening tsari bayan kaya nika iya inganta lamba gajiya ƙarfi na gear hakori surface da lankwasawa ƙarfi tushen hakori. Idan dole ne a yi amfani da wannan tsari saboda dalilai masu ƙarfi a cikin tsarin ƙirar kayan aiki, don yin la'akari da aikin NVH na tsarin, ƙarancin haƙoran haƙori na gear bayan harbi peening za a iya inganta daga waɗannan fannoni:

a. Haɓaka sigogin tsarin harbin harbi, da sarrafa haɓakar haƙoran haƙora bayan harbin leƙen asiri a kan yanayin tabbatar da saura matsawa. Wannan yana buƙatar gwaje-gwajen tsari da yawa, kuma yanayin tsarin ba shi da ƙarfi.

b. Ana ɗaukar tsarin leƙen harbe-harbe, wato, bayan an gama jujjuyawar juzu'i na yau da kullun, an ƙara wani baƙon harbin. Ƙarfin jujjuyawar harbi yawanci ƙanana ne. Za'a iya daidaita nau'in da girman kayan harbi, kamar harbin yumbu, harbin gilashi ko yanke igiyar karfe tare da ƙarami.

c. Bayan harbin peening, ana ƙara matakai kamar goge saman haƙori da honing kyauta.

A cikin wannan takarda, an yi nazarin yanayin haƙoran haƙora na yanayi daban-daban na tsarin harbe-harbe da sassa daban-daban kafin da bayan harbin harbi, kuma an zana sakamako masu zuwa bisa wallafe-wallafe:

◆ Shot peening zai kara da hakori surface roughness, wanda ya shafi halaye na sassa kafin harbi peening, harbi peening tsari sigogi da sauran dalilai, da kuma wadannan dalilai ne kuma key dalilai shafi saura matsawa danniya;

◆ A karkashin data kasance tsari tsari yanayi, matsakaicin hakori surface roughness bayan harbi peening ne 3.1 sau cewa kafin harbi peening;

◆ Haɓakar haƙori na saman haƙori zai ƙara girgiza da hayaniyar tsarin. Mafi girman juzu'i da sauri, mafi ƙarar ƙarar girgiza da hayaniya;

◆ A hakori surface roughness bayan harbi peening za a iya inganta ta optimizing da harbi peening tsari sigogi, composite harbi peening, ƙara polishing ko free honing bayan harbi peening, da dai sauransu The ingantawa na harbi peening tsari sigogi ana sa ran sarrafa roughness karawa zuwa ga roughness karawa zuwa ga roughness karawa zuwa ga roughness. kusan sau 1.5.