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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(jian)里,造型(xing)造芯都實現了機(ji)械化或(huo)自(zi)動化。常用(yong)的砂型(xing)造型(xing)造芯設備有高、中、低壓造型(xing)機(ji)、拋砂機(ji)、無箱射壓造型(xing)機(ji)、射芯機(ji)、冷(leng)和熱芯盒機(ji)等(deng)。
叉車配重鐵(tie)(tie)工藝可(ke)分為(wei)(wei)三(san)個基本部分,即配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)金(jin)(jin)屬(shu)(shu)(shu)(shu)準備(bei)、鑄(zhu)型(xing)準備(bei)和鑄(zhu)件(jian)處理。 配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)金(jin)(jin)屬(shu)(shu)(shu)(shu)是(shi)指配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)生產中用于(yu)澆注鑄(zhu)件(jian)的(de)金(jin)(jin)屬(shu)(shu)(shu)(shu)材料,它(ta)是(shi)以(yi)一種金(jin)(jin)屬(shu)(shu)(shu)(shu)元(yuan)素為(wei)(wei)主(zhu)(zhu)要成(cheng)分,并(bing)加入其他金(jin)(jin)屬(shu)(shu)(shu)(shu)或非金(jin)(jin)屬(shu)(shu)(shu)(shu)元(yuan)素而組成(cheng)的(de)合(he)金(jin)(jin),習慣上稱為(wei)(wei)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)合(he)金(jin)(jin),主(zhu)(zhu)要有鑄(zhu)鐵(tie)(tie)、鑄(zhu)鋼和配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)有色合(he)金(jin)(jin)。叉(cha)車(che)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)按造型(xing)材料的(de)不同,又可(ke)分為(wei)(wei)兩大類:一類以(yi)天然礦(kuang)產砂石(shi)作為(wei)(wei)主(zhu)(zhu)要造型(xing)材料,如熔模配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)、殼(ke)型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)、負壓(ya)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)、泥(ni)型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)、實型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)、陶瓷型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)等;一類以(yi)金(jin)(jin)屬(shu)(shu)(shu)(shu)作為(wei)(wei)主(zhu)(zhu)要鑄(zhu)型(xing)材料,如金(jin)(jin)屬(shu)(shu)(shu)(shu)型(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)、離心配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)、連(lian)續(xu)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)、叉(cha)車(che)配(pei)(pei)件(jian)鐵(tie)(tie)、低壓(ya)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)等。
配重塊結(jie)(jie)構設(she)計除(chu)應符合機器設(she)備本身(shen)的要求和機械加工工藝性的要求外,還應符合鑄造工藝的要求,配重(zhong)塊的結(jie)(jie)構設(she)計應注(zhu)意以(yi)下幾點:
一(yi)、要便于制造模型、芯盒和造型:
1)配重塊的外(wai)形(xing)應力(li)求簡單,以(yi)便于起模(mo),應盡(jin)量使鑄造分型面(mian)為平面(mian),且(qie)數目小(xiao);
2)配重塊(kuai)的內腔應(ying)力求鑄造(zao)時不用或少(shao)用型芯,當(dang)采用型芯時,應(ying)方便其支(zhi)撐、固定及排氣出砂,時應(ying)設(she)有足夠的工藝孔;
3)對于配重(zhong)塊內外側面及加(jia)強肋等結(jie)構,應在(zai)起(qi)模(mo)方向設有的結(jie)構斜度;
4)配重塊上的(de)凸(tu)臺部分與(yu)配重鐵本體(ti)不應(ying)相差(cha)過(guo)大,好取同(tong)一(yi)(yi)高度,同(tong)一(yi)(yi)面上的(de)距離較近的(de)幾個凸(tu)臺,好連成整體(ti)的(de)凸(tu)起部分。
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