大型機(ji)床鑄件是測量工(gong)(gong)(gong)(gong)件平面度的(de)基準量具，工(gong)(gong)(gong)(gong)作(zuo)(zuo)面采用(yong)刮削工(gong)(gong)(gong)(gong)藝，有(you)較好的(de)平面穩定性和(he)韌性，可(ke)以加工(gong)(gong)(gong)(gong)V形、T形、U形槽和(he)圓孔、長孔等形狀工(gong)(gong)(gong)(gong)件。機(ji)床工(gong)(gong)(gong)(gong)作(zuo)(zuo)臺是機(ji)械制造中(zhong)是的(de)基礎平臺。
大型機床(chuang)鑄件(jian)包括機床(chuang)床(chuang)身、工作臺、立柱、橫梁(liang)、龍(long)門(men)頂(ding)連接梁(liang)，重型機床(chuang)鑄件(jian)與(yu)消(xiao)震性好。熔點比較低，流(liu)動性良好，收縮率小(xiao)。
大(da)型機(ji)(ji)床(chuang)鑄(zhu)(zhu)(zhu)件規格：300mm×300mm—3000mm×6000mm，(可按用戶要(yao)求定做各種規格的(de)(de)(de)機(ji)(ji)床(chuang)工(gong)(gong)作(zuo)臺(tai)(tai)(tai)) 機(ji)(ji)床(chuang)工(gong)(gong)作(zuo)臺(tai)(tai)(tai)。機(ji)(ji)床(chuang)工(gong)(gong)作(zuo)臺(tai)(tai)(tai)的(de)(de)(de)材質：為(wei)鑄(zhu)(zhu)(zhu)鐵HT150-300，工(gong)(gong)作(zuo)面(mian)(mian)硬(ying)度為(wei)HB170-350。機(ji)(ji)床(chuang)工(gong)(gong)作(zuo)臺(tai)(tai)(tai)的(de)(de)(de)精度：平板(ban)(ban)工(gong)(gong)作(zuo)面(mian)(mian)采用刮(gua)削即(ji)人(ren)工(gong)(gong)刮(gua)研(yan)工(gong)(gong)藝。分別(bie)為(wei)0級鑄(zhu)(zhu)(zhu)鐵平臺(tai)(tai)(tai)、1級、2級、3級四個(ge)等級。機(ji)(ji)床(chuang)工(gong)(gong)作(zuo)臺(tai)(tai)(tai)實(shi)效的(de)(de)(de)重要(yao)性(xing)：平板(ban)(ban)應(ying)(ying)經過兩(liang)次人(ren)工(gong)(gong)實(shi)效(退火處理)或(huo)者(zhe)自然時效2-3年(nian),平臺(tai)(tai)(tai)內部的(de)(de)(de)部分白口組織，以減(jian)少鑄(zhu)(zhu)(zhu)件的(de)(de)(de)內應(ying)(ying)力。從而(er)提高(gao)鑄(zhu)(zhu)(zhu)鐵平臺(tai)(tai)(tai)工(gong)(gong)作(zuo)表面(mian)(mian)的(de)(de)(de)硬(ying)度和(he).使得鑄(zhu)(zhu)(zhu)鐵平臺(tai)(tai)(tai)，鑄(zhu)(zhu)(zhu)鐵平板(ban)(ban)的(de)(de)(de)精度穩定，能(neng)好。
