数控加工的目的

2019-12-23 587

为确保cnc数(shu)控加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)过(guo)(guo)程的(de)正确性,在cnc数(shu)控加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)之(zhi)前(qian)对(dui)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)程序进行验(yan)证(zheng)是一(yi)个十分重要(yao)的(de)环节。目前(qian),计(ji)算机仿真技术(shu)的(de)发展(zhan)使(shi)得在计(ji)算机环境中(zhong)对(dui)cnc数(shu)控加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)过(guo)(guo)程进行验(yan)证(zheng)的(de)技术(shu)在实(shi)际生产(chan)中(zhong)广泛(fan)应用(yong)(yong)。采用(yong)(yong)仿真方法可(ke)以在计(ji)算机上(shang)模拟出加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)走刀和零件切削(xue)(xue)的(de)全过(guo)(guo)程,直接观察在切削(xue)(xue)过(guo)(guo)程中(zhong)可(ke)能遇到的(de)问题并(bing)(bing)进行调整,而不实(shi)际占用(yong)(yong)和消耗机床、工(gong)(gong)(gong)(gong)件等资(zi)源(yuan)。此外,还(hai)可(ke)以利用(yong)(yong)计(ji)算机仿真技术(shu)预先对(dui)cnc数(shu)控加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)结(jie)果进行估计(ji),统计(ji)各种加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)数(shu)据并(bing)(bing)对(dui)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)过(guo)(guo)程进行优化,实(shi)现(xian)智能化的(de)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)。

  cnc数控加(jia)工(gong)仿真(zhen)的主要目的包括:

  (1)检(jian)验cnc数控加(jia)工(gong)程序是(shi)否(fou)有过(guo)切(qie)或欠切(qie)。通过(guo)cnc数控加(jia)工(gong)仿真,可(ke)用几(ji)何图形、图像或动画(hua)的方式显示加(jia)工(gong)过(guo)程,从而(er)检(jian)验零件的最终几(ji)何形状是(shi)否(fou)符(fu)合要求,目前主(zhu)流的CAD/CAM软件中(zhong)都(dou)具备cnc数控加(jia)工(gong)轨(gui)迹(ji)模拟及过(guo)切(qie)、欠切(qie)的分析功(gong)能。

  (2)碰(peng)(peng)撞干涉(she)检查。通过cnc数(shu)控加(jia)工(gong)仿真,可以(yi)(yi)检查cnc数(shu)控加(jia)工(gong)过程中(zhong)刀具、刀柄等(deng)(deng)与(yu)工(gong)件、夹(jia)具等(deng)(deng)是(shi)否存(cun)在(zai)碰(peng)(peng)撞干涉(she),以(yi)(yi)及检查机(ji)床(chuang)运(yun)动过程中(zhong)主轴是(shi)否与(yu)机(ji)床(chuang)零部件、夹(jia)具等(deng)(deng)存(cun)在(zai)碰(peng)(peng)撞干涉(she),从而确保(bao)能加(jia)工(gong)出(chu)符合设(she)计的(de)零件,并避免刀具、夹(jia)具和机(ji)床(chuang)的(de)不必(bi)要(yao)损坏。

                         cnc数控加工厂

  (3)切(qie)削(xue)过(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)的力(li)(li)热(re)仿(fang)真。近年(nian)来,随着仿(fang)真技(ji)术(shu)的发展(zhan)及实际生产(chan)的需要,对加(jia)工(gong)过(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)产(chan)生的力(li)(li)、热(re)等(deng)物理(li)量(liang)的分析受到越(yue)(yue)来越(yue)(yue)多(duo)的关注。通过(guo)(guo)仿(fang)真切(qie)削(xue)过(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)力(li)(li)、热(re)等(deng)物理(li)量(liang),可以(yi)对加(jia)工(gong)过(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)的受力(li)(li)状态、热(re)力(li)(li)耦(ou)合、残余应力(li)(li)等(deng)进行(xing)分析,从(cong)而为加(jia)工(gong)过(guo)(guo)程(cheng)(cheng)控(kong)制、切(qie)削(xue)参(can)数优化等(deng)提供参(can)考(kao)。

  (4)切削参(can)数(shu)(shu)(shu)优(you)化(hua)。cnc数(shu)(shu)(shu)控加(jia)工(gong)过(guo)程仿真的(de)(de)重要目的(de)(de)之一(yi)是切削参(can)数(shu)(shu)(shu)优(you)化(hua),即通过(guo)cnc数(shu)(shu)(shu)控加(jia)工(gong)过(guo)程的(de)(de)仿真,发现(xian)现(xian)有轨迹中存(cun)在的(de)(de)问题(ti)以及参(can)数(shu)(shu)(shu)设(she)置有待提(ti)升的(de)(de)部(bu)分,从(cong)而(er)对切削参(can)数(shu)(shu)(shu)进(jin)行优(you)化(hua)以提(ti)高(gao)加(jia)工(gong)效率(lv)。

  (5)刀(dao)具(ju)磨(mo)损预测。在(zai)难加工(gong)(gong)(gong)材(cai)料、高精度材(cai)料零件(jian)的(de)加工(gong)(gong)(gong)过(guo)(guo)程中,刀(dao)具(ju)的(de)磨(mo)损速率较(jiao)快且(qie)刀(dao)具(ju)磨(mo)损导致零件(jian)加工(gong)(gong)(gong)精度和(he)已加工(gong)(gong)(gong)表面(mian)的(de)完整(zheng)(zheng)性(xing)受(shou)到影响。因此(ci),预测加工(gong)(gong)(gong)过(guo)(guo)程中刀(dao)具(ju)磨(mo)损对确保加工(gong)(gong)(gong)精度与(yu)工(gong)(gong)(gong)件(jian)的(de)表面(mian)完整(zheng)(zheng)性(xing)有重要作用。

  其中,针对(dui)过切(qie)、欠切(qie)和(he)碰撞干涉检(jian)查的(de)仿(fang)(fang)真通(tong)常(chang)称(cheng)为几(ji)何与(yu)运动仿(fang)(fang)真,主要是(shi)检(jian)查cnc数(shu)控加工过程中的(de)几(ji)何量及运动关(guan)系是(shi)否正(zheng)确;力热仿(fang)(fang)真与(yu)刀具磨损的(de)预(yu)测等通(tong)常(chang)称(cheng)为物(wu)理仿(fang)(fang)真,主要是(shi)用(yong)于仿(fang)(fang)真cnc数(shu)控加工过程中物(wu)理量,并可以(yi)对(dui)加工后(hou)的(de)工件变形与(yu)质(zhi)量进行分析。


文章源自    江门cnc数控加工厂:http://www.nothingbutmemory.net/


推荐新闻