學校車位劃線分(fen)為:熱熔(rong)標(biao)(biao)(biao)線,常(chang)溫冷漆標(biao)(biao)(biao)線,彩色(se)防(fang)滑標(biao)(biao)(biao)線,振蕩防(fang)滑反光(guang)標(biao)(biao)(biao)線和預成型標(biao)(biao)(biao)線。 熱熔(rong)標(biao)(biao)(biao)線是我國道路標(biao)(biao)(biao)線上應(ying)(ying)用最(zui)廣的(de)(de)(de)一種(zhong)標(biao)(biao)(biao)線。他施工(gong)時(shi)間短,耐磨性(xing)高,造價低。 道路交通標(biao)(biao)(biao)線主要劃設(she)于道路表面,經受日曬雨淋,風雪冰凍(dong),遭(zao)受車輛的(de)(de)(de)沖擊磨耗,因此對其性(xing)能有(you)嚴格的(de)(de)(de)要求。首(shou)先(xian)要求干燥(zao)時(shi)間短,操作簡(jian)單,以(yi)減少交通干擾;其次要求反射能力強(qiang),色(se)彩鮮明,反光(guang)度(du)強(qiang),使白天、夜晚都有(you)良(liang)好的(de)(de)(de)能見度(du);第三(san),應(ying)(ying)具有(you)抗滑性(xing)和耐磨性(xing),以(yi)保證行(xing)車安全和使用壽(shou)命。
根(gen)據圖樣和技術要求,在毛坯或(huo)半(ban)成(cheng)品(pin)上用(yong)劃(hua)(hua)線(xian)(xian)工(gong)具(ju)畫出加(jia)工(gong)界(jie)線(xian)(xian),或(huo)劃(hua)(hua)出作(zuo)為(wei)基準的(de)(de)點、線(xian)(xian)的(de)(de)操(cao)作(zuo)過(guo)程(cheng)稱(cheng)(cheng)(cheng)為(wei)劃(hua)(hua)線(xian)(xian)。劃(hua)(hua)線(xian)(xian)分為(wei)平面劃(hua)(hua)線(xian)(xian)和立(li)體(ti)(ti)劃(hua)(hua)線(xian)(xian)兩種。只(zhi)需要在工(gong)件一(yi)個(ge)表面上劃(hua)(hua)線(xian)(xian)即能明(ming)確表明(ming)加(jia)工(gong)界(jie)限(xian)的(de)(de),稱(cheng)(cheng)(cheng)之為(wei)平面劃(hua)(hua)線(xian)(xian);需要在工(gong)件幾個(ge)互(hu)(hu)成(cheng)不同角度(du)(一(yi)般(ban)是互(hu)(hu)相垂直)的(de)(de)表面上劃(hua)(hua)線(xian)(xian),才(cai)能明(ming)確表明(ming)加(jia)工(gong)界(jie)限(xian)的(de)(de),稱(cheng)(cheng)(cheng)為(wei)立(li)體(ti)(ti)劃(hua)(hua)線(xian)(xian)。對(dui)劃(hua)(hua)線(xian)(xian)的(de)(de)基本要求是線(xian)(xian)條清晰勻稱(cheng)(cheng)(cheng),定型、定位(wei)尺(chi)寸準確。由于(yu)劃(hua)(hua)線(xian)(xian)的(de)(de)線(xian)(xian)條有一(yi)定寬度(du),一(yi)般(ban)要求精(jing)度(du)達(da)到0.25-0.5mm。應(ying)當(dang)注(zhu)意(yi),工(gong)件的(de)(de)加(jia)工(gong)精(jing)度(du)不能完全由劃(hua)(hua)線(xian)(xian)確定,而應(ying)該在加(jia)工(gong)過(guo)程(cheng)中通過(guo)測量來保證(zheng)。
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