劃(hua)線(xian)平(ping)板(ban)(ban)恒溫(wen)(wen)：修理室(shi)的溫(wen)(wen)度(du)很重要，太高或太低都不容易嵌砂(sha)，一(yi)(yi)般(ban)(ban)溫(wen)(wen)度(du)在20度(du)。有的單位壓砂(sha)房間(jian)(jian)恒溫(wen)(wen)條件比較差，當劃(hua)線(xian)平(ping)板(ban)(ban)從一(yi)(yi)溫(wen)(wen)度(du)拿到另(ling)一(yi)(yi)溫(wen)(wen)度(du)的房間(jian)(jian)研(yan)磨時，平(ping)板(ban)(ban)受熱(re)漲冷縮現象(xiang)的影響，表面產(chan)生變形(xing)，故(gu)等溫(wen)(wen)一(yi)(yi)段時間(jian)(jian)，一(yi)(yi)般(ban)(ban)劃(hua)線(xian)平(ping)板(ban)(ban)在壓砂(sha)前等溫(wen)(wen)數小時或 長時間(jian)(jian)，待劃(hua)線(xian)平(ping)板(ban)(ban)變形(xing)穩定后，再開(kai)始研(yan)磨。

　　對(dui)于(yu)新劃(hua)(hua)線(xian)(xian)平(ping)板(ban)(ban)和表面(mian)劃(hua)(hua)痕(hen)、碰傷(shang)(shang)較(jiao)(jiao)重的(de)劃(hua)(hua)線(xian)(xian)平(ping)板(ban)(ban)，先用(yong)油(you)石(shi)打(da)(da)磨一(yi)下(xia)，打(da)(da)磨后，我們先用(yong)M4的(de)砂子修(xiu)一(yi)下(xia)板(ban)(ban)面(mian)，三塊劃(hua)(hua)線(xian)(xian)平(ping)板(ban)(ban)互相研(yan)磨，待推拉費力(li)的(de)時候(hou)，卸下(xia)劃(hua)(hua)線(xian)(xian)平(ping)板(ban)(ban)，直到劃(hua)(hua)線(xian)(xian)平(ping)板(ban)(ban)板(ban)(ban)的(de)平(ping)面(mian)度較(jiao)(jiao)好時，停止修(xiu)理平(ping)板(ban)(ban)，做到心里(li)有數。對(dui)于(yu)使用(yong)中劃(hua)(hua)痕(hen)、碰傷(shang)(shang)較(jiao)(jiao)輕的(de)劃(hua)(hua)線(xian)(xian)平(ping)板(ban)(ban)，只用(yong)油(you)石(shi)把突(tu)起的(de)部分(fen)打(da)(da)磨下(xia)去 行，不用(yong)修(xiu)理劃(hua)(hua)線(xian)(xian)平(ping)板(ban)(ban)，直接壓砂 可以(yi)了。

　　劃線(xian)(xian)平(ping)板(ban)(ban)(ban)用(yong)來檢查機(ji)器零(ling)件(jian)平(ping)面度(du)，直(zhi)線(xian)(xian)度(du)等(deng)形(xing)位(wei)公(gong)差(cha)的(de)測量(liang)(liang)基(ji)準(zhun)，也可(ke)用(yong)于零(ling)件(jian)劃線(xian)(xian)研(yan)(yan)磨加工(gong)，安裝(zhuang)設(she)備等(deng)用(yong)途。是檢驗機(ji)械零(ling)件(jian)平(ping)面、平(ping)行度(du)、直(zhi)線(xian)(xian)度(du)等(deng)形(xing)位(wei)公(gong)差(cha)的(de)測量(liang)(liang)基(ji)準(zhun)，也可(ke)用(yong)于一般(ban)零(ling)件(jian)及零(ling)件(jian)的(de)劃線(xian)(xian)、鉚(liu)焊研(yan)(yan)磨工(gong)藝加工(gong)及測量(liang)(liang)等(deng)。劃線(xian)(xian)平(ping)板(ban)(ban)(ban)在(zai)制造過程中進行取樣理化試驗、金(jin)相(xiang)分析，考核產品(pin)是否達到(dao)各項(xiang)技術指標(biao)。劃線(xian)(xian)平(ping)板(ban)(ban)(ban)工(gong)作(zuo)面的(de)硬度(du)應(ying)(ying)為HB170-220,劃線(xian)(xian)平(ping)板(ban)(ban)(ban)工(gong)作(zuo)面應(ying)(ying)采用(yong)刮削工(gong)藝。劃線(xian)(xian)平(ping)板(ban)(ban)(ban)用(yong)完后擦(ca)凈，涂(tu)無水(shui)酸性(xing)的(de)防(fang)(fang)銹油，覆蓋(gai)防(fang)(fang)潮(chao)紙(zhi)，置于清潔干燥處存放。劃線(xian)(xian)平(ping)板(ban)(ban)(ban)使(shi)用(yong)前用(yong)無腐蝕性(xing)汽油，將工(gong)作(zuo)面的(de)防(fang)(fang)銹油洗(xi)凈，并用(yong)脫脂(zhi)棉紗(sha)擦(ca)拭干凈，方可(ke)使(shi)用(yong)。溫度(du)變化會使(shi)測量(liang)(liang)產生誤(wu)差(cha)，應(ying)(ying)在(zai)20±50C范圍內使(shi)用(yong)。劃線(xian)(xian)平(ping)板(ban)(ban)(ban)用(yong)時小心、嚴防(fang)(fang)碰撞。劃線(xian)(xian)平(ping)板(ban)(ban)(ban)使(shi)用(yong)時用(yong)水(shui)平(ping)儀調整到(dao)水(shui)平(ping)，使(shi)支點(dian)(dian)均(jun)勻分布各支點(dian)(dian)上。

　　劃(hua)線平板(ban)(ban)()的(de)(de)工(gong)(gong)(gong)作面要擦拭干凈，在確認沒有問題(ti)的(de)(de)情況下使用，使用過(guo)(guo)程中(zhong)，要注(zhu)意避(bi)免工(gong)(gong)(gong)件和劃(hua)線平臺的(de)(de)工(gong)(gong)(gong)作面有過(guo)(guo)激的(de)(de)碰撞，防止損(sun)壞(huai)劃(hua)線平板(ban)(ban)的(de)(de)工(gong)(gong)(gong)作面;工(gong)(gong)(gong)件的(de)(de)重量 不可(ke)以超過(guo)(guo)劃(hua)線平板(ban)(ban)的(de)(de)額定載荷，否則會(hui)造(zao)(zao)成工(gong)(gong)(gong)作質(zhi)量降低(di)，還有可(ke)能(neng)損(sun)壞(huai)劃(hua)線平板(ban)(ban)的(de)(de)結構，甚至會(hui)造(zao)(zao)成劃(hua)線平板(ban)(ban)變形，使之損(sun)壞(huai)，無法使用。