劃線平臺研制開發全部采用
CAD
/
CAM
技術(shu)。產品制成筋板式和箱體(ti)式,工作(zuo)面有長(chang)方(fang)形、正方(fang)形或(huo)圓形,材料
HT200-300
,
QT400-600
,
ZG15-45
。
劃(hua)線平臺的加(jia)工(gong)(gong)(gong)工(gong)(gong)(gong)藝:實型(xing)模型(xing)及工(gong)(gong)(gong)裝→實型(xing)鑄造→鑄件人工(gong)(gong)(gong)時(shi)效處理(li)→粗加(jia)工(gong)(gong)(gong)→二次人工(gong)(gong)(gong)時(shi)效→精加(jia)工(gong)(gong)(gong)→人工(gong)(gong)(gong)刮研(yan)(yan)→檢(jian)驗合格→包(bao)裝。劃(hua)線平臺的工(gong)(gong)(gong)作面采用刮研(yan)(yan)工(gong)(gong)(gong)藝,工(gong)(gong)(gong)作面上(shang)可加(jia)工(gong)(gong)(gong)
V
形、
T
型、
U
型槽、燕尾槽、和圓(yuan)孔(kong)、長孔(kong)等。
劃線平臺的(de)設計、安裝、調試(shi)、驗收均按中華人民共和國“
JB/T7974-1999
”和(he)
JB/T7975-1999
檢定標準(zhun)及企業內控標準(zhun)執行。
對(dui)于“
3
”級劃線平臺(tai)的(de)工作(zuo)面(mian)(mian)可以采用刨(bao)削工藝(yi),刨(bao)削工作(zuo)表面(mian)(mian)的(de)表面(mian)(mian)粗糙度按輪(lun)廓算術(shu)平均偏(pian)差
Ra
值應不大于
5um
(按(an)
GB1031
-
83
《表面粗糙度參數及其數值》)。
劃線(xian)平臺在(zai)制造過程中進行取樣理化試驗、金(jin)相分(fen)析,考核產品是否達到各項技(ji)術指標。
劃線(xian)平臺(tai)用完后擦(ca)凈,涂無水(shui)酸性的防(fang)銹(xiu)油,覆蓋防(fang)潮紙(zhi),置(zhi)于清(qing)潔干(gan)燥(zao)處(chu)存放。劃線(xian)平臺(tai)使(shi)用前用無腐蝕性汽油,將(jiang)工作面的防(fang)銹(xiu)油洗凈,并用脫脂(zhi)棉紗擦(ca)拭干(gan)凈,方可使(shi)用。溫度變化會使(shi)測量產生誤差,應在
20
±
50C
范圍內使用。劃線平(ping)(ping)臺用時(shi)小心、嚴防(fang)碰(peng)撞。劃線平(ping)(ping)臺使用時(shi)用水(shui)平(ping)(ping)儀調整到水(shui)平(ping)(ping),使支點均勻分布各(ge)支點上。