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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間里,造(zao)型造(zao)芯都實現了機(ji)械化或(huo)自動化。常用(yong)的砂(sha)(sha)型造(zao)型造(zao)芯設備有高、中、低(di)壓造(zao)型機(ji)、拋(pao)砂(sha)(sha)機(ji)、無箱射(she)(she)壓造(zao)型機(ji)、射(she)(she)芯機(ji)、冷和熱(re)芯盒機(ji)等。
叉車配重鐵(tie)(tie)(tie)工藝可分為(wei)三個(ge)基(ji)本部分,即配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金(jin)(jin)(jin)屬(shu)準備、鑄(zhu)型準備和鑄(zhu)件處理。 配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金(jin)(jin)(jin)屬(shu)是指配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)生(sheng)產中(zhong)用(yong)于澆注鑄(zhu)件的金(jin)(jin)(jin)屬(shu)材(cai)(cai)料,它是以(yi)(yi)一(yi)種金(jin)(jin)(jin)屬(shu)元素(su)為(wei)主要(yao)(yao)成(cheng)分,并加入其他金(jin)(jin)(jin)屬(shu)或非金(jin)(jin)(jin)屬(shu)元素(su)而組(zu)成(cheng)的合(he)金(jin)(jin)(jin),習慣上稱為(wei)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)合(he)金(jin)(jin)(jin),主要(yao)(yao)有鑄(zhu)鐵(tie)(tie)(tie)、鑄(zhu)鋼和配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)有色合(he)金(jin)(jin)(jin)。叉車配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)按造(zao)型材(cai)(cai)料的不同,又(you)可分為(wei)兩大(da)類(lei):一(yi)類(lei)以(yi)(yi)天然礦產砂石作為(wei)主要(yao)(yao)造(zao)型材(cai)(cai)料,如熔模配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、殼型配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、負壓配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、泥型配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、實型配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、陶瓷型配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等(deng);一(yi)類(lei)以(yi)(yi)金(jin)(jin)(jin)屬(shu)作為(wei)主要(yao)(yao)鑄(zhu)型材(cai)(cai)料,如金(jin)(jin)(jin)屬(shu)型配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、離心(xin)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、連(lian)續(xu)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、叉車配(pei)(pei)(pei)件鐵(tie)(tie)(tie)、低壓配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等(deng)。
配重塊結(jie)構設(she)計除(chu)應(ying)(ying)(ying)符合(he)機器設(she)備本身的要(yao)求和機械加工工藝(yi)(yi)性的要(yao)求外,還應(ying)(ying)(ying)符合(he)鑄造(zao)工藝(yi)(yi)的要(yao)求,配重(zhong)塊的結(jie)構設(she)計應(ying)(ying)(ying)注意以下幾(ji)點:
一、要便于制(zhi)造(zao)模型、芯盒(he)和造(zao)型:
1)配重塊的外(wai)形(xing)應力求簡(jian)單,以便于(yu)起模(mo),應盡(jin)量使(shi)鑄造(zao)分(fen)型面為(wei)平面,且(qie)數目小;
2)配重塊的內腔應力求鑄造時不用或少(shao)用型(xing)芯(xin),當(dang)采用型(xing)芯(xin)時,應方便其支撐、固定及排氣出砂,時應設有足(zu)夠(gou)的工藝(yi)孔;
3)對(dui)于配重塊內外側面(mian)及加強肋(lei)等結構,應(ying)在起(qi)模(mo)方向設有的結構斜度;
4)配重(zhong)塊上的凸臺(tai)部分(fen)與配重(zhong)鐵本體(ti)不應相差過(guo)大,好取同一高度,同一面上的距(ju)離較(jiao)近的幾個凸臺(tai),好連(lian)成整體(ti)的凸起部分(fen)。
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