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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(li),造型造芯(xin)都實現了機(ji)(ji)械化或自(zi)動化。常(chang)用的砂型造型造芯(xin)設備有高(gao)、中、低壓(ya)造型機(ji)(ji)、拋砂機(ji)(ji)、無箱射(she)壓(ya)造型機(ji)(ji)、射(she)芯(xin)機(ji)(ji)、冷和熱芯(xin)盒機(ji)(ji)等(deng)。
叉車配重鐵(tie)(tie)(tie)(tie)(tie)(tie)工藝可分為(wei)(wei)三個基本部分,即配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)金(jin)(jin)屬(shu)準備、鑄(zhu)型(xing)準備和(he)鑄(zhu)件(jian)處(chu)理。 配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)金(jin)(jin)屬(shu)是(shi)指配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)生(sheng)產中用于澆(jiao)注鑄(zhu)件(jian)的金(jin)(jin)屬(shu)材料,它是(shi)以一種(zhong)金(jin)(jin)屬(shu)元(yuan)素(su)為(wei)(wei)主要(yao)成(cheng)分,并加入其他(ta)金(jin)(jin)屬(shu)或非(fei)金(jin)(jin)屬(shu)元(yuan)素(su)而組成(cheng)的合(he)(he)金(jin)(jin),習慣上稱為(wei)(wei)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)合(he)(he)金(jin)(jin),主要(yao)有(you)鑄(zhu)鐵(tie)(tie)(tie)(tie)(tie)(tie)、鑄(zhu)鋼和(he)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)有(you)色合(he)(he)金(jin)(jin)。叉(cha)(cha)車(che)(che)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)按造型(xing)材料的不(bu)同,又可分為(wei)(wei)兩大類:一類以天然礦產砂石作(zuo)為(wei)(wei)主要(yao)造型(xing)材料,如(ru)熔模配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)、殼型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)、負壓配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)、泥(ni)型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)、實(shi)型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)、陶(tao)瓷型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)等(deng);一類以金(jin)(jin)屬(shu)作(zuo)為(wei)(wei)主要(yao)鑄(zhu)型(xing)材料,如(ru)金(jin)(jin)屬(shu)型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)、離(li)心配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)、連(lian)續配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)、叉(cha)(cha)車(che)(che)配(pei)(pei)件(jian)鐵(tie)(tie)(tie)(tie)(tie)(tie)、低壓配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)(tie)等(deng)。
配重塊結(jie)構設(she)計除應符(fu)合機(ji)器(qi)設(she)備(bei)本身的要求(qiu)和機(ji)械加(jia)工(gong)工(gong)藝(yi)性的要求(qiu)外(wai),還應符(fu)合鑄造工(gong)藝(yi)的要求(qiu),配重塊的結(jie)構設(she)計應注意以(yi)下幾(ji)點(dian):
一、要便(bian)于(yu)制(zhi)造(zao)模型、芯盒和造(zao)型:
1)配重塊的(de)外形應力(li)求(qiu)簡單(dan),以便于(yu)起模(mo),應盡量使(shi)鑄造分型(xing)面(mian)為平面(mian),且(qie)數目小;
2)配重塊的內腔應(ying)(ying)力求(qiu)鑄造時(shi)不用(yong)或少用(yong)型(xing)芯,當采用(yong)型(xing)芯時(shi),應(ying)(ying)方便其支撐、固定及(ji)排氣(qi)出(chu)砂(sha),時(shi)應(ying)(ying)設有足夠的工(gong)藝孔(kong);
3)對于配重塊(kuai)內外側面及加(jia)強肋等結構(gou),應(ying)在起模(mo)方向設有的結構(gou)斜度;
4)配重(zhong)塊(kuai)上的(de)凸(tu)臺部分與(yu)配重(zhong)鐵(tie)本體(ti)不應相差過(guo)大,好(hao)取同一(yi)高(gao)度,同一(yi)面上的(de)距離較近的(de)幾個凸(tu)臺,好(hao)連成整體(ti)的(de)凸(tu)起部分。
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