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高速加工中心的数控系统概述

日期:2017-08-10 作(zuo)者(zhe): 人气:1899

高(gao)(gao)(gao)速(su)(su)(su)(su)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)中(zhong)(zhong)心(xin)是一种可以对加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)件(jian)进行高(gao)(gao)(gao)速(su)(su)(su)(su)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)的(de)(de)(de)(de)一种工(gong)(gong)(gong)(gong)具能够(gou)如此快速(su)(su)(su)(su)的(de)(de)(de)(de)进行工(gong)(gong)(gong)(gong)件(jian)的(de)(de)(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)除了因为高(gao)(gao)(gao)速(su)(su)(su)(su)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)中(zhong)(zhong)心(xin)的(de)(de)(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)精密(mi)度(du)和成熟的(de)(de)(de)(de)技术之外更多的(de)(de)(de)(de)还是得利(li)与其优秀的(de)(de)(de)(de)数控(kong)系(xi)统(tong)(tong),在当前的(de)(de)(de)(de)机(ji)床(chuang)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)行业中(zhong)(zhong)为视线高(gao)(gao)(gao)速(su)(su)(su)(su)稳定的(de)(de)(de)(de)高(gao)(gao)(gao)精度(du)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)运行快速(su)(su)(su)(su)且功能强大的(de)(de)(de)(de)计算机(ji)数控(kong)系(xi)统(tong)(tong)是必不可少,需(xu)要注意的(de)(de)(de)(de)是高(gao)(gao)(gao)速(su)(su)(su)(su)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)中(zhong)(zhong)心(xin)的(de)(de)(de)(de)数控(kong)系(xi)统(tong)(tong)必须(xu)能够(gou)足够(gou)快地(di)处理数控(kong)程(cheng)(cheng)序代(dai)码(ma)段以保持程(cheng)(cheng)序中(zhong)(zhong)规定的(de)(de)(de)(de)进给速(su)(su)(su)(su)度(du)。

 

高(gao)速(su)(su)(su)加(jia)工中心在(zai)实(shi)际运行中是计(ji)算机数(shu)(shu)(shu)控系统(tong)用(yong)于(yu)测(ce)量一(yi)次(ci)工作台的(de)实(shi)际位(wei)置并发出一(yi)次(ci)进给命令(ling)所用(yong)的(de)时(shi)(shi)间,对(dui)于(yu)伺(si)服周期和代码(ma)(ma)段处理(li)(li)时(shi)(shi)间是计(ji)算机数(shu)(shu)(shu)控系统(tong)的(de)两个(ge)重(zhong)要参(can)(can)数(shu)(shu)(shu)及(ji)其概念。计(ji)算机数(shu)(shu)(shu)控系统(tong)处理(li)(li)并完成一(yi)条加(jia)工指令(ling)代码(ma)(ma)段规(gui)定的(de)位(wei)移(yi)所花费的(de)时(shi)(shi)间。 计(ji)算机数(shu)(shu)(shu)控系统(tong)的(de)这(zhei)两个(ge)参(can)(can)数(shu)(shu)(shu)对(dui)于(yu)高(gao)速(su)(su)(su)加(jia)工中心来说非常重(zhong)要,因(yin)为(wei)他们将决定机床的(de)加(jia)工速(su)(su)(su)度和加(jia)工精度。在(zai)这(zhei)里,精度意味着(zhe)在(zai)采用(yong)线(xian)性(xing)插补时(shi)(shi),用(yong)直线(xian)段来逼近零件轮廊所允许的(de)最大误差。

 

我们可以(yi)(yi)看到在(zai)高(gao)(gao)速(su)加(jia)(jia)工(gong)(gong)(gong)(gong)中(zhong)计(ji)算(suan)机(ji)(ji)(ji)数(shu)控(kong)(kong)系(xi)(xi)(xi)(xi)(xi)统(tong)必须保证形成精确的(de)(de)(de)(de)加(jia)(jia)工(gong)(gong)(gong)(gong)轨(gui)(gui)迹,另(ling)外,在(zai)用(yong)直线段来逼(bi)近零(ling)件轮(lun)廊时,为了保证精度,直线段势必很(hen)短,从而使得(de)零(ling)件程(cheng)序变(bian)(bian)得(de)很(hen)长(zhang)。基于此,计(ji)算(suan)机(ji)(ji)(ji)数(shu)控(kong)(kong)系(xi)(xi)(xi)(xi)(xi)统(tong)需要一(yi)个32位的(de)(de)(de)(de)微处(chu)(chu)(chu)理器(qi),有(you)时甚(shen)至需要多(duo)个微处(chu)(chu)(chu)理器(qi),以(yi)(yi)完成高(gao)(gao)速(su)插补、高(gao)(gao)速(su)段处(chu)(chu)(chu)理和良好(hao)的(de)(de)(de)(de)待(dai)(dai)(dai)加(jia)(jia)工(gong)(gong)(gong)(gong)轨(gui)(gui)迹监(jian)控(kong)(kong)(Look Ahead)功能(neng)。为了能(neng)预先知道(dao)刀(dao)具(ju)路(lu)径(jing)以(yi)(yi)避免在(zai)拐角 处(chu)(chu)(chu)出(chu)现(xian)事故(gu),计(ji)算(suan)机(ji)(ji)(ji)数(shu)控(kong)(kong)系(xi)(xi)(xi)(xi)(xi)统(tong)最(zui)好(hao)是(shi)(shi)具(ju)有(you)较多(duo)段加(jia)(jia)工(gong)(gong)(gong)(gong) NC代码(ma)轨(gui)(gui)迹监(jian)控(kong)(kong)的(de)(de)(de)(de)能(neng)力(li),这与司机(ji)(ji)(ji)必须有(you)良好(hao)的(de)(de)(de)(de)视野 范围(wei)才能(neng)高(gao)(gao)速(su)驾驶一(yi)辆汽(qi)车有(you)些类似。 目前(qian)所(suo)有(you)较高(gao)(gao)水平的(de)(de)(de)(de)计(ji)算(suan)机(ji)(ji)(ji)数(shu)控(kong)(kong)系(xi)(xi)(xi)(xi)(xi)统(tong)都具(ju)有(you)待(dai)(dai)(dai)加(jia)(jia)工(gong)(gong)(gong)(gong)轨(gui)(gui)迹监(jian)控(kong)(kong)能(neng)力(li)。所(suo)谓(wei)待(dai)(dai)(dai)加(jia)(jia)工(gong)(gong)(gong)(gong)轨(gui)(gui)迹监(jian)控(kong)(kong),就(jiu)是(shi)(shi)计(ji)算(suan)机(ji)(ji)(ji)数(shu)控(kong)(kong)系(xi)(xi)(xi)(xi)(xi)统(tong)在(zai)控(kong)(kong)制(zhi)加(jia)(jia)工(gong)(gong)(gong)(gong)的(de)(de)(de)(de)同时扫描待(dai)(dai)(dai)加(jia)(jia)工(gong)(gong)(gong)(gong)的(de)(de)(de)(de)数(shu)控(kong)(kong)代码(ma),看刀(dao)具(ju)路(lu)径(jing)是(shi)(shi)否有(you)方(fang)向上的(de)(de)(de)(de)突然改(gai)变(bian)(bian),如果计(ji)算(suan)机(ji)(ji)(ji)数(shu)控(kong)(kong)系(xi)(xi)(xi)(xi)(xi)统(tong)发现(xian)前(qian)面必须改(gai)变(bian)(bian)进给(ji)方(fang)向时,自动(dong)执行加(jia)(jia)减速(su)程(cheng)序,以(yi)(yi)避免高(gao)(gao)速(su)加(jia)(jia)工(gong)(gong)(gong)(gong)中(zhong)心偏离程(cheng)序中(zhong)规定的(de)(de)(de)(de)切削加(jia)(jia)工(gong)(gong)(gong)(gong)路(lu)径(jing)。


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