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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)(zao)型(xing)造(zao)(zao)芯(xin)都實現了機(ji)(ji)(ji)械化(hua)或(huo)自動化(hua)。常用的砂型(xing)造(zao)(zao)型(xing)造(zao)(zao)芯(xin)設備有高、中(zhong)、低壓造(zao)(zao)型(xing)機(ji)(ji)(ji)、拋砂機(ji)(ji)(ji)、無箱(xiang)射壓造(zao)(zao)型(xing)機(ji)(ji)(ji)、射芯(xin)機(ji)(ji)(ji)、冷和熱(re)芯(xin)盒(he)機(ji)(ji)(ji)等。
叉車配重鐵(tie)(tie)(tie)工藝(yi)可分(fen)為(wei)三個基本(ben)部分(fen),即配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金(jin)屬(shu)(shu)(shu)準(zhun)備(bei)、鑄型(xing)準(zhun)備(bei)和(he)鑄件(jian)(jian)處理。 配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金(jin)屬(shu)(shu)(shu)是(shi)指配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)生(sheng)產中用于(yu)澆注鑄件(jian)(jian)的金(jin)屬(shu)(shu)(shu)材(cai)料,它是(shi)以一(yi)種金(jin)屬(shu)(shu)(shu)元素為(wei)主要(yao)成分(fen),并加入其他(ta)金(jin)屬(shu)(shu)(shu)或非金(jin)屬(shu)(shu)(shu)元素而組成的合(he)金(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),主要(yao)有鑄鐵(tie)(tie)(tie)、鑄鋼和(he)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)有色合(he)金(jin)。叉車(che)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)按(an)造型(xing)材(cai)料的不同,又可分(fen)為(wei)兩(liang)大類:一(yi)類以天然(ran)礦產砂石作為(wei)主要(yao)造型(xing)材(cai)料,如熔(rong)模(mo)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、殼型(xing)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(xing)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、實型(xing)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、陶瓷(ci)型(xing)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等(deng);一(yi)類以金(jin)屬(shu)(shu)(shu)作為(wei)主要(yao)鑄型(xing)材(cai)料,如金(jin)屬(shu)(shu)(shu)型(xing)配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、離心配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、連續配(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、叉車(che)配(pei)(pei)(pei)件(jian)(jian)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)構設計(ji)除(chu)應(ying)(ying)符合(he)機器設備本身的要(yao)求(qiu)和機械(xie)加工(gong)工(gong)藝性的要(yao)求(qiu)外,還應(ying)(ying)符合(he)鑄造(zao)工(gong)藝的要(yao)求(qiu),配重塊的結(jie)構設計(ji)應(ying)(ying)注意以(yi)下幾點:
一、要便于制造模(mo)型、芯盒和造型:
1)配重(zhong)塊的(de)外形應力求簡單,以(yi)便于(yu)起模,應盡量(liang)使(shi)鑄造分型面為平(ping)面,且數目(mu)小;
2)配重(zhong)塊的內腔應(ying)(ying)力求鑄(zhu)造(zao)時不用或少用型芯,當采用型芯時,應(ying)(ying)方便其(qi)支(zhi)撐、固定(ding)及排氣出砂,時應(ying)(ying)設有(you)足(zu)夠(gou)的工藝(yi)孔(kong);
3)對于配重(zhong)塊內外側面(mian)及加強肋等結構,應在起模方(fang)向設(she)有(you)的結構斜度;
4)配重(zhong)(zhong)塊上的(de)凸臺部(bu)分與配重(zhong)(zhong)鐵本體不(bu)應相差過(guo)大,好取同(tong)一(yi)高(gao)度,同(tong)一(yi)面上的(de)距離較近的(de)幾個凸臺,好連成整體的(de)凸起部(bu)分。
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