Rubber shims imasiya kugwedezeka isanayambe. Amalinganiza makina popanda kugaya zitsulo motsutsana ndi zitsulo. Amayamwa kunjenjemera komwe kukanatopetsa ma welds, ma crack base, kapena ma shafts olakwika. Tawawona akusintha ntchito yolumikizira mphindi 30 kukhala 90-masekondi - ndikuletsa $ 12,000 munthawi yosakonzekera pamzere wazolongedza ku Shandong.
Chifukwa chiyani mphira umanyezimira kuposa zitsulo ndi pulasitiki pamakonzedwe enieni adziko lapansi
Mainjiniya ambiri amafika poyambira zitsulo zachitsulo. Iwo amadziwa. Iwo ndi okhwima. Iwo amadzimva “amphamvu.” Koma kuuma kumalephera pamene kusuntha kulipo. Chitsulo chimasamutsa kugwedezeka kwama frequency apamwamba molunjika ku maziko. pulasitiki shims compress mosagwirizana pansi pa matenthedwe njinga. Rubber—makamaka EPDM, NBR, kapena silikoni zosakaniza zokhala ndi 40–70 Shore A hardness—amapereka kupatuka kolamulidwa. Mayeso athu a labu akuwonetsa 65 Shore A EPDM shims amachepetsa nsonga za 1.2-8 kHz ndi 42-68% poyerekeza ndi milu yachitsulo yofanana.
Nthawi ina tidasintha mashimu 17 osanjikiza osapanga dzimbiri pansi pa mpope woziziritsa wa CNC wokhala ndi mashimu atatu a rabara a 2-mm. Kugwedera matalikidwe atsika kuchoka pa 7.3 mm/s RMS kufika pa 2.1 mm/s RMS. Pampuyo imakhala ndi moyo kuyambira miyezi 14 mpaka miyezi 33. Palibe recalibration chofunika. Palibe kubwerezabwereza pambuyo pa kutentha kwa kutentha. Kutentha kosasinthasintha kokha m'malo ozungulira kutentha kuchokera -20 ° C mpaka +80 ° C.
Mashimu a rabara amathetsanso kusanja bwino komwe kuli kofunikira. Shimu yokhuthala ya 0.5-mm yokhala ndi ± 0.03 mm makulidwe ake imakhala ndi kusalala mkati mwa 0.05 mm/m—yolimba kuposa mbale zambiri zachitsulo. Izi ndizofunikira mukagwirizanitsa ma conveyor otsogozedwa ndi laser kapena ma sensor optical. Simukugaya, mumayika. Simukuyesa kawiri, mumatsimikizira kamodzi.
Zolakwa zitatu zomwe zimapangitsa kuti ma shimu a rabara alephereke - ndi momwe angapewere
Ena angatsutse kuti mphira umawonongeka mofulumira kwambiri pansi pa mafuta kapena UV. Izi ndi zoona - kwa gulu lolakwika. Tawona zolephera m'mayikidwe am'madzi am'madzi pomwe ma shimu a rabara akuda adatupa 300% mumafuta a dizilo. Koma NBR (nitrile) shims kupirira kumizidwa mosalekeza mu mafuta hayidiroliki kwa zaka zoposa 5. EPDM imatsutsa ozoni ndi nyengo. Silicone imagwira ntchito yotseketsa nthunzi. Kusankha kwazinthu sikosankha-ndilo lingaliro loyamba la uinjiniya.
Cholakwika #1: Kunyalanyaza ma compression set. Labala yotsika mtengo imachepa mpaka kalekale pambuyo pa katundu. Shimu yomwe imakanikiza 15% tsiku limodzi ndi ina 8% pakadutsa miyezi 6 imasiya zida zosasinthika. Timatchula ma shims ndi <5% kupsinjika komwe kumayikidwa pambuyo pa maola 70 pa 70 ° C pa ASTM D395 Njira B.
Cholakwika #2: Kugwiritsa ntchito zomatira zomata pafupi ndi magwero otentha. Guluuyo amafewa. Shimu imatsetsereka. M'malo mwake, timadula ma shimu kuti akhale ngati momwe amachitira - palibe chowonjezera, palibe ngozi ya peel. Pamisonkhano yomangidwa ndi bawuti, timalimbikitsa 1.5 × kukula kwa bawuti ngati shim m'lifupi mwake kuti tipewe kupindika m'mphepete.
Cholakwika #3: Kungoganiza kuti "rabala" yonse ndi yofanana. Makasitomala m'modzi anayesa tepi yowonera nyengo yagalimoto ngati shimu. Idaphatikizira 60% pansi pa 2 MPa katundu ndipo sichinachira. Zopangira mphira zenizeni zamakampani zimanyamula mphamvu zolimba ≥8 MPa ndi elongation ≥300%. Manambala amenewo sakutsatsa - ndi malipoti oyesa omwe mungapemphe musanayitanitse.
Momwe mungasankhire shimu yoyenera ya rabara-mwachangu
Yambani ndi katundu wanu. Osati kulemera kwathunthu-koma mphamvu pa lalikulu sentimita pansi pa ntchito yamphamvu. Galimoto ya 500-kg yomwe ikuyenda pa 2950 rpm imapereka ~ 1.8 MPa nsonga yapamwamba pa malo okwera. Izi zimafuna 60-70 Shore A NBR, osachepera 3 mm wandiweyani.
Kenako fananitsani chilengedwe:
- Kuwonekera kwa mafuta? Sankhani NBR-yoyesedwa ku ISO 1817 mu ISO VG 46 hydraulic mafuta
- Dzuwa lakunja ndi mvula? Sankhani EPDM—UV-yokhazikika, yosamva ozoni, yovotera -40°C
- Chakudya kapena chipinda chaukhondo? Tchulani silikoni yogwirizana ndi FDA kapena EPDM yoyera, Class VI yoyesedwa
- Mpweya wotentha kwambiri? Silicone yokha-yokhazikika mpaka 200 ° C mosalekeza
Makulidwe amabwera komaliza. Osawunjika kuposa mashimu awiri. Mawonekedwe aliwonse amawonjezera kutsetsereka kwapang'onopang'ono ndikuchepetsa kuchepa kwachangu. Ngati mukufuna kukweza mamilimita 4.5, gwiritsani ntchito shimu imodzi ya 4.5-osati 3-mm + 1.5-mm peyala. Timasunga makulidwe oyambira 0.5 mm mpaka 10 mm mu increments 0.5-mm, onse odulidwa mpaka ± 0.02 mm kulolerana.
Mawonekedwe amatsatira ntchito. Zozungulira shims center bolts. Mlatho wa rectangular shims mlatho wotakata. Ma profayilo odulira mwamakonda amakhala ndi zokwera mosiyanasiyana - monga za makina osindikizira zakale kapena zida zoluka. Timatumiza kupanga kumayenda mu maola 72. Prototypes mu 48.
Mashimu a rabara sizinthu zowonjezera - ndi njira zopangira
Amakhala pomwe mphamvu imakumana ndi dongosolo. Kumene kumayenda kumakumana bata. Kumene kulondola kumagwirizana ndi zenizeni. Nthawi iliyonse shimu ya rabara imatenga ma joules 0,3 a mphamvu ya kinetic, imalepheretsa ma fractures ang'onoang'ono m'ma welds oyandikana nawo. Millimeter iliyonse ya kutembenuka koyendetsedwa kumatalikitsa moyo wobala. Kuyika kulikonse komwe kubwerezedwa kumachepetsa nthawi yotumizira.
Hebei Dewell Metal Products Co., LTD imapanga shimu za rabara pamodzi ndi zomangira zitsulo zosapanga dzimbiri, ma washer, ndi makina a nangula —chifukwa kugwedezeka kumayambira pa olowa, osati chimango. Malo awo m'boma la Yongnian amapanga ma shims oyesedwa ku ISO 9001:2015, omwe ali ndi batch traceability mpaka manambala amitundu yambiri. Mumapeza shim-osati kungoyerekeza.
Nthawi inanso kugwedezeka kwamphamvu, kusasunthika molakwika, kapena kusanja kuwononga m'mawa wanu, funsani: Kodi ili ndi vuto la makina - kapena vuto la kusankha zinthu? Mashimu a rabara sangakonze maziko oyipa kapena ma bere owonongeka. Koma adzakonza zomwe adapangira: kutembenuza kusakhazikika kukhala chete, ndi kusatsimikizika kukhala kulondola kobwerezabwereza. Izi sizothandiza. Ndilo gawo la injiniya.
