Yawancin lokaci muna amfani da Pn, CLass, hanya ce ta matsin lamba, bambancin shine suna wakiltar matsin lamba a ƙarƙashin yanayin zafin yanayin da yake daidai ya banbanta, tsarin Pn na Turai yana nufin matsin lamba daidai a 120 ℃, yayin da ƙa'idodin Amurkan ke nufin matsin lamba daidai a 425.5 ℃. Sabili da haka, a cikin musayar injiniya ba zai iya kawai don sauya matsa lamba ba, kamar CLass300 # kawai tare da jujjuyawar matsa lamba ya zama 2.1 Mpa, amma idan kun yi la'akari da amfani da yanayin zafin jiki, matsin lambar da ke daidai zai tashi, gwargwadon matsin lamba na kayan gwajin yayi daidai da 5.0 Mpa.
Akwai tsarin bawul iri biyu: daya ita ce Jamus (gami da China) a matsayin wakilin zazzabi na yau da kullun (Sin tana da digiri 100, Jamus tana da digiri 120) an yarda da matsi na aiki a matsayin ma'aunin tsarin "maras matsin lamba". Isaya shine “tsarin matsi na zafin jiki” wanda Amurka ta wakilta, wanda ya dogara da izinin aiki a wani yanayi. A cikin tsarin matsin lamba na Amurka, duk matakan sun dogara ne akan digiri 454 banda 150LB dangane da digiri 260. Fans na 150 lb (150psi = 1MPa) Class 25 carbon steel bawul yana da danniya mai izini na 1MPa a digiri 260, amma damuwar da aka yarda a cikin zafin jiki ya fi haka girma, kusan 2.0MPa.
Sabili da haka, gabaɗaya ana cewa matakin matsin lamba mara daidai da Matsayin Amurka 150LB shine 2.0MPa, matakin matsin lamba mara dacewa da 300LB shine 5.0MPa, da sauransu. Sabili da haka, baza'a iya canza matsin lamba da matsin lamba kamar yadda yake ba. Pn wakilci ne na lamba na lambar da ke da alaƙa da matsin lamba, shine don samar da madaidaiciyar lambar madaidaiciya don tunani, Pn ya yi daidai da lambar Mpa mai matsakaicin lamba, yawanci ana amfani da shi a cikin matsin lamba na bawul ɗin gida.
Don bawul ɗin sarrafawa na jikin bawul na ƙarfe na ƙarfe, yana nufin matsakaicin izinin aiki yayin amfani da shi ƙasa 200 ℃; Don jikin baƙin ƙarfe, matsakaicin izinin aiki don sabis ƙasa da 120 ° C; Don bawul masu sarrafawa tare da jikin bakin karfe, matsakaicin izinin aiki don sabis ƙasa 250 ° C. Lokacin da yawan zafin jiki na aiki ya ƙaru, za a rage juriya na ƙarfin bawul ɗin. Bawul na daidaitattun bawul na Amurka suna bayyana matsin lamba a cikin laban lasa, wanda shine lissafin yanayin zafin zafin da daurin karfe bisa ga ANSIB16.34. Babban dalilin da yasa fam da matsin lamba ba ɗaya bane - zuwa - ɗayan wasiƙa shine cewa nauyin fam da matsin lamba suna da datum daban-daban.
Yawancin lokaci muna amfani da software don yin lissafi, amma yana da mahimmanci sanin yadda ake amfani da tebur don neman ƙimar nauyi. A Japan, ana amfani da babban darajar K don nuna matakin matsi. Don matsa lamba na gas, a cikin Sin, gabaɗaya muna amfani da rukunin taro "kg" (maimakon "jin"), naúrar kg. Nauyin matsin lamba kilogram na centimita 2, kuma kilogram na matsi kilogram na ƙarfi mai aiki akan santimita murabba'i ɗaya. Hakanan, daidai da baƙi, don matsin lamba na gas, matsin lamba da ake amfani da shi shine "psi", naúrar ita ce "1pound / inch2 ″," Pound per square inch ", Ingilishi cikakken suna Pound per square inch.
Amma an fi kiransa da ƙungiyar taro, ko LB., wanda shine ainihin LB. Wannan fam din kenan. Dukkanin raka'a zuwa ma'aunin awo ana iya aiki dasu: 1psi = 1 laban / Inch2 ≈0.068bar, 1bar≈14.5psi≈0.1MPa, Turai da Amurka da wasu ƙasashe da suke amfani da psi a matsayin naúrar. A cikin Class600 da Class1500 masu dacewa da daidaitattun Turai da tsarin Amurka suna da ƙimomi daban-daban guda biyu, 11MPa (daidai da aji na fam 600) shine tanadin tsarin Turai, wannan yana cikin "ISO7005-1-1992 Karfe flanges" a ciki tanadin; 10MPa (daidai yake da fam 600 na aji) shine tsarin tsarin Amurka, wanda aka tanada a cikin ASMEB16.5. Saboda haka, ba za a iya faɗi gaba ɗaya cewa madaidaitan nauyin 600 fam 11MPa ko 10MPa ba ne, kuma tanadin tsarin daban ya bambanta.
Tsarin bawul galibi yana da nau'ikan 2: ɗayan shine Jamus (haɗe da China) a matsayin wakilin yanayin zafin jiki na yau da kullun (Sin tana da digiri 100, Jamus tana da digiri 120) yana ba da izinin matsin aiki a matsayin ma'aunin tsarin "mara matsin lamba". Isaya shine tsarin “matsa lamba na zafin jiki” wanda Amurka ta wakilta, wanda ya dogara da izinin aiki a wani yanayi. A Amurka, tsarin matsi na zafin jiki ya ta'allaka ne akan digiri 454 banda na 150LB dangane da digiri 260.
Misali, 150LB. # 25 bawul na bakin karfe yana da danniyar izini na 1MPa a digiri 260, yayin da danniya da aka yarda dashi a dakin yayi yawa fiye da hakan, kusan 2.0MPa. Sabili da haka, gabaɗaya ana cewa matakin matsin lamba mara daidai da Matsayin Amurka 150LB shine 2.0MPa, matakin matsin lamba mara dacewa da 300LB shine 5.0MPa, da sauransu. Sabili da haka, baza'a iya canza matsin lamba da matsin lamba kamar yadda yake ba.
Post lokaci: Mar-24-2021