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鑄件的精度和生產過程的經濟表現,主要取決于這道工序。在很多現代化的配重鐵車(che)間里,造型造芯(xin)(xin)(xin)都實現(xian)了機械化或自動(dong)化。常用的砂型造型造芯(xin)(xin)(xin)設備有高、中(zhong)、低壓造型機、拋(pao)砂機、無(wu)箱射壓造型機、射芯(xin)(xin)(xin)機、冷和熱芯(xin)(xin)(xin)盒機等(deng)。
叉車配重鐵(tie)(tie)(tie)(tie)工(gong)藝可(ke)分(fen)為(wei)三個基(ji)本部分(fen),即配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)金(jin)(jin)(jin)屬準(zhun)備、鑄(zhu)(zhu)型準(zhun)備和鑄(zhu)(zhu)件處(chu)理。 配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)金(jin)(jin)(jin)屬是指配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)生產中用于(yu)澆注鑄(zhu)(zhu)件的金(jin)(jin)(jin)屬材料(liao),它(ta)是以一(yi)種金(jin)(jin)(jin)屬元(yuan)素為(wei)主(zhu)要成分(fen),并加入其他金(jin)(jin)(jin)屬或(huo)非(fei)金(jin)(jin)(jin)屬元(yuan)素而組成的合(he)金(jin)(jin)(jin),習慣上稱為(wei)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)合(he)金(jin)(jin)(jin),主(zhu)要有鑄(zhu)(zhu)鐵(tie)(tie)(tie)(tie)、鑄(zhu)(zhu)鋼和配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)有色合(he)金(jin)(jin)(jin)。叉(cha)車配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)按造(zao)型材料(liao)的不同,又可(ke)分(fen)為(wei)兩(liang)大類:一(yi)類以天然礦(kuang)產砂石作(zuo)為(wei)主(zhu)要造(zao)型材料(liao),如熔模配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)、殼(ke)型配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)、負壓配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)、泥型配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)、實型配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)、陶瓷(ci)型配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)等;一(yi)類以金(jin)(jin)(jin)屬作(zuo)為(wei)主(zhu)要鑄(zhu)(zhu)型材料(liao),如金(jin)(jin)(jin)屬型配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)、離心配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)、連續配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)、叉(cha)車配(pei)(pei)(pei)(pei)件鐵(tie)(tie)(tie)(tie)、低(di)壓配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)等。
配重塊結(jie)構(gou)設計(ji)除(chu)應(ying)(ying)符(fu)(fu)合機器設備本身的要求和機械加工(gong)工(gong)藝性的要求外,還應(ying)(ying)符(fu)(fu)合鑄造工(gong)藝的要求,配重塊的結(jie)構(gou)設計(ji)應(ying)(ying)注意以下幾點:
一、要便于制造模型、芯盒和造型:
1)配(pei)重塊的外形(xing)應力(li)求簡(jian)單,以便于起模,應盡(jin)量使鑄(zhu)造分型(xing)面為平面,且數目(mu)小;
2)配重塊的(de)內(nei)腔應(ying)(ying)力求鑄造(zao)時不用或少用型芯(xin),當采(cai)用型芯(xin)時,應(ying)(ying)方便其支撐、固(gu)定(ding)及排氣出砂,時應(ying)(ying)設有(you)足夠的(de)工藝(yi)孔(kong);
3)對于配重塊(kuai)內(nei)外側面及加強(qiang)肋等結構,應在(zai)起模方(fang)向設有(you)的結構斜度(du);
4)配重塊上的凸(tu)臺部分(fen)(fen)與配重鐵本體不應相差過(guo)大,好取(qu)同一高度,同一面(mian)上的距(ju)離較近的幾個凸(tu)臺,好連成(cheng)整體的凸(tu)起部分(fen)(fen)。
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