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当前位置:首页 > 机械/制造/汽车 > 制造加工工艺 > 数控车床操作与实训试题1
让我们看到了如何去做才叫坚定了理想信念,如何去做才算做到了奉献、坚守,做到了一名优秀共产党员应该做到的。rationalconcepttoallownetworkmoreinlinewiththeobjectivelawsofthefuturedevelopmentofthecity.1.5.2planningresearchareas:throughoutthecity,withanareaof13,000km2,cover2districtsand8countiesofthecity,includingdowntownandcitylevels.Planningrange:mainforCityCenterCity,areafor1268km2,NorthtocasesfieldXiang,andJinPingzhen,andGaoDianZhen,andhuangshazhen,andLiuhometownNorthTownshipterritories,EastNanXIZhen,andJiangnanEastTownshipterritories,Southtohorsehome,andsonghome,andLiZhuangZhen,andSouthwidetown,andZhaofieldStreetdoSouthadministrativeborder,Westtobaixizhen,anddishdamtown,andthoughtslopeXiangWestTownshipterritories.1.6planningtarget1.6.1GeneraltargetthisitemsresearchtowillYibincitybuiltYangtzeRiverupstreamchuanYunnanGuizhoucombinedDepartmentRegionalCenterCity,supportcityspaceoforderedexpandfortarget,referenceYibincityintegratedtrafficplanning(2014-2030years)andtheYibinCityCitygeneralplanning(2013-2030years)ofresearchresults,usingscience,andadvancedofnetworkresearchmethod,buildingmorelevel,andmoremodeoftracktrafficsystem,Meetatdifferentlevelsofthecity'srailtransportationneedsandqualityrequirements.1.6.2target1,refinedurbandevelopmentaxisofurbandevelopmentconcepts,judgments,rail-guideddowntownfromsolotogroup-developmentofthenetwork,fromoneCentertocentercitywithaxialdevelopment.2,networkplanningadaptedtoYibinCitystatusandfuturedevelopmentneeds,demonstratesrationalscaleofrailtransporttomeettheneeds数控车床等级考试试题一、选择题:(以下四个备选答案中其中一个为正确答案,请将其代号填入括号内)1.图样中螺纹的底径线用(C)绘制。(A)粗实线(B)细点划线(C)细实线(D)虚线2.装配图的读图方法,首先看(B),了解部件的名称。.(A)零件图(B)明细表(C)标题栏(D)技术文件3.公差代号H7的孔和代号(C)的轴组成过渡配合。(A)f6(B)g6(C)m6(D)u64.尺寸Ø48F6中,“6”代表(B)(A)尺寸公差带代号(B)公差等级代号(C)基本偏差代号(D)配合代号5.牌号为45的钢的含碳量为百分之(C)。(A)45(B)4.5(C)0.45(D)0.0456.轴类零件的调质处理热处理工序应安排在(B)。(A)粗加工前(B)粗加工后,精加工前(C)精加工后(D)渗碳后7.下列钢号中,(A)钢的综合力学性能最好。(A)45(B)T10(C)20(D)088.常温下刀具材料的硬度应在(A)以上。(A)HRC60(B)HRC50(C)HRC80(D)HRC1009.三星齿轮的作用是(D)。(A)改变传动比(B)提高传动精度(C)齿轮间联接(D)改变丝杠转向10.一对相互啮合的齿轮,其模数、(B)必须相等才能正常传动。(A)齿数比(B)齿形角(C)分度圆直径(D)齿数11.数控车床中,目前数控装置的脉冲当量,一般为(B)。(A)0.01(B)0.001(C)0.0001(D)0.112.MC是指(D)的缩写。(A)自动化工厂(B)计算机数控系统(C)柔性制造系统(D)数控加工中心13.工艺基准除了测量基准、装配基准以外,还包括(A)。(A)定位基准(B)粗基准(C)精基准(D)设计基准14.零件加工时选择的定位粗基准可以使用(A)。(A)一次(B)二次(C)三次(D)四次及以上15.工艺系统的组成部分不包括(C)。(A)机床(B)夹具(C)量具(D)刀具16.车床上的卡盘、中心架等属于(A)夹具。(A)通用(B)专用(C)组合(D)标准17.工件的定位精度主要靠(A)来保证。(A)定位元件(B)辅助元件(C)夹紧元件(D)其他元件18.切削用量中(A)对刀具磨损的影响最大。(A)切削速度(B)进给量(C)进给速度(D)背吃刀量19.刀具上切屑流过的表面称为(A)。(A)前刀面(B)后刀面(C)副后刀面(D)侧面20.为了减少径向力,车细长轴时,车刀主偏角应取(C)。(A)30°~45°(B)50°~60°(C)80°~90°(D)15°~20°21.既可车外圆又可车端面和倒角的车刀,其主偏角应采用(B)。(A)30°(B)45°(C)60°(D)90°让我们看到了如何去做才叫坚定了理想信念,如何去做才算做到了奉献、坚守,做到了一名优秀共产党员应该做到的。rationalconcepttoallownetworkmoreinlinewiththeobjectivelawsofthefuturedevelopmentofthecity.1.5.2planningresearchareas:throughoutthecity,withanareaof13,000km2,cover2districtsand8countiesofthecity,includingdowntownandcitylevels.Planningrange:mainforCityCenterCity,areafor1268km2,NorthtocasesfieldXiang,andJinPingzhen,andGaoDianZhen,andhuangshazhen,andLiuhometownNorthTownshipterritories,EastNanXIZhen,andJiangnanEastTownshipterritories,Southtohorsehome,andsonghome,andLiZhuangZhen,andSouthwidetown,andZhaofieldStreetdoSouthadministrativeborder,Westtobaixizhen,anddishdamtown,andthoughtslopeXiangWestTownshipterritories.1.6planningtarget1.6.1GeneraltargetthisitemsresearchtowillYibincitybuiltYangtzeRiverupstreamchuanYunnanGuizhoucombinedDepartmentRegionalCenterCity,supportcityspaceoforderedexpandfortarget,referenceYibincityintegratedtrafficplanning(2014-2030years)andtheYibinCityCitygeneralplanning(2013-2030years)ofresearchresults,usingscience,andadvancedofnetworkresearchmethod,buildingmorelevel,andmoremodeoftracktrafficsystem,Meetatdifferentlevelsofthecity'srailtransportationneedsandqualityrequirements.1.6.2target1,refinedurbandevelopmentaxisofurbandevelopmentconcepts,judgments,rail-guideddowntownfromsolotogroup-developmentofthenetwork,fromoneCentertocentercitywithaxialdevelopment.2,networkplanningadaptedtoYibinCitystatusandfuturedevelopmentneeds,demonstratesrationalscaleofrailtransporttomeettheneeds22.标准麻花钻的顶角φ的大小为(C)。(A)90º(B)100º(C)118º(D)120º23.车削右旋螺纹时主轴正转,车刀由右向左进给,车削左旋螺纹时应该使主轴(A)进给。(A)倒转,车刀由右向左(B)倒转,车刀由左向右(C)正转,车刀由左向右(D)正转,车刀由右向左24螺纹加工中加工精度主要由机床精度保证的几何参数为(D)。(A)大径(B)中径(C)小径(D)导程25.数控机床有不同的运动方式,需要考虑工件与刀具相对运动关系及坐标方向,采用(B)的原则编写程序。(A)刀具不动,工件移动(B)工件固定不动,刀具移动(C)根据实际情况而定(D)铣削加工时刀具固定不动,工件移动;车削加工时刀具移动,工件不动27.数控机床面板上JOG是指(B)。(A)快进(B)点动(C)自动(D)暂停28.数控车床的开机操作步骤应该是(B)。(A)开电源,开急停开关,开CNC系统电源(B)开电源,开CNC系统电源,开急停开关(C)开CNC系统电源,开电源,开急停开关(D)都不对29.以下(A)指令,在使用时应按下面板“暂停”开关,才能实现程序暂停。(A)M01(B)M00(C)M02(D)M0630.机床照明灯应选(C)V供电。(A)220(B)110(C)36(D)8031.图样中所标注的尺寸,为机件的(B)完工尺寸。(A)第一道工序(B)第二道工序(C)最后一道工序(D)中间检查工序33.公差为0.01的Ø10轴与公差为0.01的Ø100轴相比加工精度(B)。(A)Ø10高(B)Ø100高(C)差不多(D)无法判断34.如图所示,尺寸Ø20的公差等于(A)。(A)0.021(B)–0.021(C)0(D)19.97935.含碳量小于(A)钢称为低碳钢。(A)0.25%(B)0.15%(C)0.6%(D)2.11%36.调质处理是指(D)和高温回火相结合的一种工艺。(A)完全退火(B)去应力退火(C)正火(D)淬火37.以下材料中,耐磨性最好的是(D)。(A)纯铜(B)铸铁(C)中碳钢(D)高碳钢38.加大前角能使车刀锋利、减少切屑变形、减轻切屑与前刀面的摩擦,从而(A)切削力。(A)降低(B)减少(C)增大(D)升高39.为了减少刀具磨损,刀具前角应(D)。(A)小些(B)较小些(C)大些(D)较大些40.刀具角度中对断屑影响较大的是
本文标题:数控车床操作与实训试题1
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