金工实习考试题库(含答案)49145.doc

金工实习考试题库(含答案)49145车工(共22道题)1.车床变速箱主轴变速由（A ）实现。HTMLCONTROL Forms.HTML:Option.1 A 齿轮HTMLCONTROL Forms.HTML:Option.1 B 链轮HTMLCONTROL Forms.HTML:Option.1 C 皮带轮HTMLCONTROL Forms.HTML:Option.1 D 凸轮2.车刀刃倾角的主要作用是控制切屑流向，并影响刀头强度。(A)HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错3.对方形工件进行车削加工时，正确的装夹方法是采用 (D)HTMLCONTROL Forms.HTML:Option.1 A 三爪卡盘HTMLCONTROL Forms.HTML:Option.1 B 花盘HTMLCONTROL Forms.HTML:Option.1 C 两顶尖HTMLCONTROL Forms.HTML:Option.1 D 四爪卡盘4.切削加工时，主运动通常只能有一个。(A)HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错5.若零件的锥面斜角为A，则用小刀架转位法车锥面时，小刀架应转动：(B)HTMLCONTROL Forms.HTML:Option.1 A 2AHTMLCONTROL Forms.HTML:Option.1 B 0.5AHTMLCONTROL Forms.HTML:Option.1 C A6.试切法就是通过试切测量调整再试切反复进行，使工件尺寸达到要求的加工方法。(A)HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错7.下列哪一项不是小刀架转位法车锥面的特点( A)HTMLCONTROL Forms.HTML:Option.1 A 能采用自动进给HTMLCONTROL Forms.HTML:Option.1 B 可车外锥面HTMLCONTROL Forms.HTML:Option.1 C 可车任意锥度的锥面8.主运动是各类机床切削加工时速度最高，功率消耗最大的那个运动。下列表述不正确的选项是：(D)HTMLCONTROL Forms.HTML:Option.1 A 车削加工的主运动是工件的旋转运动HTMLCONTROL Forms.HTML:Option.1 B 铣削加工的主运动是刀具的旋转运动HTMLCONTROL Forms.HTML:Option.1 C 刨削加工的主运动是刀具的往复运动HTMLCONTROL Forms.HTML:Option.1 D 数控线切割加工的主运动是工件的移动9.在常用机械加工方法中，钻削加工精度等级最低。(A)HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错10.在普通卧式车床上主要加工 (C)HTMLCONTROL Forms.HTML:Option.1 A 支架类零件HTMLCONTROL Forms.HTML:Option.1 B 盘、轴、套类零件HTMLCONTROL Forms.HTML:Option.1 C 箱体类零件11.车床中拖板可带动车刀沿大拖板上导轨做 (A)HTMLCONTROL Forms.HTML:Option.1 A 纵向移动HTMLCONTROL Forms.HTML:Option.1 B 横向移动HTMLCONTROL Forms.HTML:Option.1 C 斜向移动HTMLCONTROL Forms.HTML:Option.1 D 任意方向移动12.C6136车床型号中的“36”代表：(A)HTMLCONTROL Forms.HTML:Option.1 A 最大回转直径的1/10;HTMLCONTROL Forms.HTML:Option.1 B 最大加工长度360毫米HTMLCONTROL Forms.HTML:Option.1 C 回转中心高360毫米13.C616车床型号中的“16”代表：(C)HTMLCONTROL Forms.HTML:Option.1 A 最大回转直径的1/10HTMLCONTROL Forms.HTML:Option.1 B 最大加工长度为1600毫米HTMLCONTROL Forms.HTML:Option.1 C 主轴中心高HTMLCONTROL Forms.HTML:Option.1 D 最大回转半径14.用棒料加工10个小套，其孔径为20H8，长度为20mm，Ra=1.6m，孔应如何加工? (D)HTMLCONTROL Forms.HTML:Option.1 A 镗HTMLCONTROL Forms.HTML:Option.1 B 钻-镗-磨HTMLCONTROL Forms.HTML:Option.1 C 钻-磨HTMLCONTROL Forms.HTML:Option.1 D 钻-镗15.用棒料加工2个轴套，其孔径为40H6，长度为25mm，Ra=0.4m，孔应如何加工? (B)HTMLCONTROL Forms.HTML:Option.1 A 镗HTMLCONTROL Forms.HTML:Option.1 B 钻-镗-磨HTMLCONTROL Forms.HTML:Option.1 C 钻-磨HTMLCONTROL Forms.HTML:Option.1 D 钻-镗16.安装车刀时，刀尖：(B)HTMLCONTROL Forms.HTML:Option.1 A 应高于工件回转中心HTMLCONTROL Forms.HTML:Option.1 B 应低于工件回转中心； HTMLCONTROL Forms.HTML:Option.1 C 与工件回转中心等高17.在车床上不可以进行的加工有 (D)HTMLCONTROL Forms.HTML:Option.1 A 车外圆；车锥面HTMLCONTROL Forms.HTML:Option.1 B 钻孔;钻中心孔；镗孔HTMLCONTROL Forms.HTML:Option.1 C 车螺纹HTMLCONTROL Forms.HTML:Option.1 D 齿轮齿形加工18.C6136或C616车床的机械传动的传动副有下列哪几种：皮带传动 齿轮传动 涡轮蜗杆传动 齿轮齿条传动 丝杆螺母传动（B ）HTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 19.在基本尺寸相同情况下，尺寸公差值越小，则尺寸精度越高 (A)HTMLCONTROL Forms.HTML:Option.1 A 正确HTMLCONTROL Forms.HTML:Option.1 B 错误20.在实习中车削小锤杆时采用的顶尖方式是 (A)HTMLCONTROL Forms.HTML:Option.1 A 活动顶尖HTMLCONTROL Forms.HTML:Option.1 B 固定顶尖HTMLCONTROL Forms.HTML:Option.1 C 不用顶尖HTMLCONTROL Forms.HTML:Option.1 D 不确定21.车床主轴通常采用空心结构，其目的是 减轻主轴重量 提高主轴刚性 降低机床振动 便于棒料零件（毛坯）装夹 (C)HTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 22.在各类机床中，加工精度最高的是 (D)HTMLCONTROL Forms.HTML:Option.1 A 车床HTMLCONTROL Forms.HTML:Option.1 B 铣床HTMLCONTROL Forms.HTML:Option.1 C 镗床HTMLCONTROL Forms.HTML:Option.1 D 磨床1.车刀刀尖运动轨迹若平行于工件轴线，则为( A)HTMLCONTROL Forms.HTML:Option.1 A 车端面HTMLCONTROL Forms.HTML:Option.1 B 车外圆HTMLCONTROL Forms.HTML:Option.1 C 车锥面2.车削加工的进给量F表示( C)HTMLCONTROL Forms.HTML:Option.1 A 工件转速变化HTMLCONTROL Forms.HTML:Option.1 B 刀具在单位时间移动的距离HTMLCONTROL Forms.HTML:Option.1 C 工件每转一周，刀具移动的距离HTMLCONTROL Forms.HTML:Option.1 D 切削速度的变化3.车削加工切削用量三要素是指：(C)HTMLCONTROL Forms.HTML:Option.1 A 切削速度、工件转速和切削深度HTMLCONTROL Forms.HTML:Option.1 B 工件转速、进给量和切削深度HTMLCONTROL Forms.HTML:Option.1 C 切削速度、工件转速和进给量HTMLCONTROL Forms.HTML:Option.1 D 切削速度、进给量和切削深度4.车锥角60°的圆锥表面，应将小拖板转过60°。(B)HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错5.大拖板与溜板箱相联，用于带动刀架（车刀）沿床身导轨作纵向运动。(B)HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错6.切断刀有两个副偏角。(A)HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错7.切削加工时，主运动通常只能有一个。(A)HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错8.主运动是各类机床切削加工时速度最高，功率消耗最大的那个运动。下列表述不正确的选项是：(D)HTMLCONTROL Forms.HTML:Option.1 A 车削加工的主运动是工件的旋转运动HTMLCONTROL Forms.HTML:Option.1 B 铣削加工的主运动是刀具的旋转运动HTMLCONTROL Forms.HTML:Option.1 C 刨削加工的主运动是刀具的往复运动HTMLCONTROL Forms.HTML:Option.1 D 数控线切割加工的主运动是工件的移动9.在常用机械加工方法中，钻削加工精度等级最低。(A )HTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错10.车床的主运动是 (C)HTMLCONTROL Forms.HTML:Option.1 A 刀具纵向移动;HTMLCONTROL Forms.HTML:Option.1 B 刀具横向移动HTMLCONTROL Forms.HTML:Option.1 C 工件的旋转运动HTMLCONTROL Forms.HTML:Option.1 D 尾架的移动11.车外圆时,如果主轴转速增大,则进给量 (C)HTMLCONTROL Forms.HTML:Option.1 A 增大;HTMLCONTROL Forms.HTML:Option.1 B 减小HTMLCONTROL Forms.HTML:Option.1 C 不变HTMLCONTROL Forms.HTML:Option.1 D 不确定12.车端面时,若端面中心留有小凸台,原因是 ( B)HTMLCONTROL Forms.HTML:Option.1 A 刀尖高于回转中心HTMLCONTROL Forms.HTML:Option.1 B 刀尖低于回转中心HTMLCONTROL Forms.HTML:Option.1 C 刀尖高度等于回转中心13.在下列普通车床中,若要加工最大直径为360mm的工件,不能选用下列哪种型号的车床? ( A)HTMLCONTROL Forms.HTML:Option.1 A C6132HTMLCONTROL Forms.HTML:Option.1 B C618HTMLCONTROL Forms.HTML:Option.1 C C6136HTMLCONTROL Forms.HTML:Option.1 D C614014.刀具切削部分的材料应具备下列那些基本性能（C ）高硬度和耐磨性 足够的硬度和韧性 不易被加工 较高的耐热性HTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 15.下列哪些表面，哪个不可以在车床上加工 (C)HTMLCONTROL Forms.HTML:Option.1 A 回转成型面HTMLCONTROL Forms.HTML:Option.1 B 圆锥面HTMLCONTROL Forms.HTML:Option.1 C 椭圆孔HTMLCONTROL Forms.HTML:Option.1 D 滚花的表面16.车刀前角的主要作用是 (C)HTMLCONTROL Forms.HTML:Option.1 A 控制切屑的流动方向； HTMLCONTROL Forms.HTML:Option.1 B 减小后刀面与工件的摩擦； HTMLCONTROL Forms.HTML:Option.1 C 使刀刃锋利HTMLCONTROL Forms.HTML:Option.1 D 防止前刀面与切屑摩擦；17.用以改变车床主轴转速的部件是（B ） HTMLCONTROL Forms.HTML:Option.1 A 主轴箱HTMLCONTROL Forms.HTML:Option.1 B 变速箱HTMLCONTROL Forms.HTML:Option.1 C 进给箱HTMLCONTROL Forms.HTML:Option.1 D 溜板箱18.在车床中用以带动丝杠和光杠转动的部件是（D ）HTMLCONTROL Forms.HTML:Option.1 A 主轴箱HTMLCONTROL Forms.HTML:Option.1 B 变速箱HTMLCONTROL Forms.HTML:Option.1 C 进给箱HTMLCONTROL Forms.HTML:Option.1 D 溜板箱19.在切削加工中，冷却液的主要作用有： 冷却 润滑 清洗 防锈（C ）HTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 20.刀具材料在高温状态下切削时仍能保持高硬度性能，称为 (C)HTMLCONTROL Forms.HTML:Option.1 A 韧性HTMLCONTROL Forms.HTML:Option.1 B 耐磨性HTMLCONTROL Forms.HTML:Option.1 C 红硬性HTMLCONTROL Forms.HTML:Option.1 D 工艺性21.在车削加工中，精车时合理的切削用量应选择 (D )HTMLCONTROL Forms.HTML:Option.1 A 较低切削速度，较小的进给量，较大的背吃刀量HTMLCONTROL Forms.HTML:Option.1 B 较高切削速度，较小的进给量，较大的背吃刀量HTMLCONTROL Forms.HTML:Option.1 C 较低切削速度，较大的进给量，较小的背吃刀量HTMLCONTROL Forms.HTML:Option.1 D 较高切削速度，较小的进给量，较小的背吃刀量22.车削加工时，工件装夹后一次性完成端面、外圆和孔加工的目的主要是为了保证零件的 ( B)HTMLCONTROL Forms.HTML:Option.1 A 尺寸精度HTMLCONTROL Forms.HTML:Option.1 B 形状精度HTMLCONTROL Forms.HTML:Option.1 C 位置精度HTMLCONTROL Forms.HTML:Option.1 D 表面粗糙度1.W18Cr4V是一种常用合金工具钢（高速钢）材料牌号，适合于加工铸铁零件。BHTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错2.车床变速箱主轴变速由（A ）实现。HTMLCONTROL Forms.HTML:Option.1 A 齿轮HTMLCONTROL Forms.HTML:Option.1 B 链轮HTMLCONTROL Forms.HTML:Option.1 C 皮带轮HTMLCONTROL Forms.HTML:Option.1 D 凸轮3.车床能够自动定心的夹紧装置是 BHTMLCONTROL Forms.HTML:Option.1 A 四爪卡盘 HTMLCONTROL Forms.HTML:Option.1 B 三爪卡盘 HTMLCONTROL Forms.HTML:Option.1 C 花盘4.车刀上切屑流过的表面称作 AHTMLCONTROL Forms.HTML:Option.1 A 前刀面HTMLCONTROL Forms.HTML:Option.1 B 主后面HTMLCONTROL Forms.HTML:Option.1 C 副后面 HTMLCONTROL Forms.HTML:Option.1 D 切削平面5.车削加工的进给量F表示 CHTMLCONTROL Forms.HTML:Option.1 A 工件转速变化HTMLCONTROL Forms.HTML:Option.1 B 刀具在单位时间移动的距离HTMLCONTROL Forms.HTML:Option.1 C 工件每转一周，刀具移动的距离HTMLCONTROL Forms.HTML:Option.1 D 切削速度的变化6.车锥角60°的圆锥表面，应将小拖板转过60°。BHTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错7.在车削加工中，为了确定工件轴向的定位和测量基准，一般应先加工端面。AHTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错8.对方形工件进行车削加工时，正确的装夹方法是采用 DHTMLCONTROL Forms.HTML:Option.1 A 三爪卡盘HTMLCONTROL Forms.HTML:Option.1 B 花盘HTMLCONTROL Forms.HTML:Option.1 C 两顶尖HTMLCONTROL Forms.HTML:Option.1 D 四爪卡盘9.车削外圆时的合理步骤顺序是 调整机床 车刀安装 工件安装 试切 车削外圆 CHTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 10.适合做车刀材料的是 碳素结构钢 碳素工具钢 合金工具钢 硬质合金 DHTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 11.切断刀有两个副偏角。AHTMLCONTROL Forms.HTML:Option.1 A 对HTMLCONTROL Forms.HTML:Option.1 B 错12.三爪卡盘与四爪卡盘比较 CHTMLCONTROL Forms.HTML:Option.1 A 两者都能自动定心，前者的定心精度比后者高HTMLCONTROL Forms.HTML:Option.1 B 两者都能自动定心，后者的定心精度比前者高HTMLCONTROL Forms.HTML:Option.1 C 前者能自动定心，而后者则不能，后者的定心精度比前者高13.在实习中车削小锤杆时采用的安装方法是 AHTMLCONTROL Forms.HTML:Option.1 A 三爪卡盘装夹HTMLCONTROL Forms.HTML:Option.1 B 三爪卡盘顶尖装夹HTMLCONTROL Forms.HTML:Option.1 C 双顶尖装夹HTMLCONTROL Forms.HTML:Option.1 D 四爪卡盘装夹14.下列刀具材料中，哪种红硬温度最高 BHTMLCONTROL Forms.HTML:Option.1 A 碳素工具钢HTMLCONTROL Forms.HTML:Option.1 B 合金工具钢HTMLCONTROL Forms.HTML:Option.1 C 硬质合金15.刀具切削部分的材料应具备下列那些基本性能（C ）高硬度和耐磨性 足够的硬度和韧性 不易被加工 较高的耐热性HTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 16.在车床上不可以进行的加工有 DHTMLCONTROL Forms.HTML:Option.1 A 车外圆；车锥面HTMLCONTROL Forms.HTML:Option.1 B 钻孔;钻中心孔；镗孔HTMLCONTROL Forms.HTML:Option.1 C 车螺纹HTMLCONTROL Forms.HTML:Option.1 D 齿轮齿形加工17.C6136或C616车床的机械传动的传动副有下列哪几种：皮带传动 齿轮传动 涡轮蜗杆传动 齿轮齿条传动 丝杆螺母传动（B ）HTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 18.在车床中,用以带动中拖板和刀架移动的部件是 CHTMLCONTROL Forms.HTML:Option.1 A 变速箱 HTMLCONTROL Forms.HTML:Option.1 B 进给箱 HTMLCONTROL Forms.HTML:Option.1 C 溜板箱HTMLCONTROL Forms.HTML:Option.1 D 主轴箱 _19.试解释型号为C6136车床的含义： 立式车床 卧式车床 工件最大回转半径360m 工件最大回转直径360mm DHTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 20.车床主轴通常采用空心结构，其目的是 减轻主轴重量 提高主轴刚性 降低机床振动 便于棒料零件（毛坯）装夹 CHTMLCONTROL Forms.HTML:Option.1 A HTMLCONTROL Forms.HTML:Option.1 B HTMLCONTROL Forms.HTML:Option.1 C HTMLCONTROL Forms.HTML:Option.1 D 21.在车床上钻孔时工件不需要划线和打样冲眼也能保证孔与端面垂直，这是因为 DHTMLCONTROL Forms.HTML:Option.1 A 车床切削力大HTMLCONTROL Forms.HTML:Option.1 B 工件装夹牢固HTMLCONTROL Forms.HTML:Option.1 C 车床的刚性好HTMLCONTROL Forms.HTML:Option.1 D 钻头与工件端面保持垂直22.在各类机床中，加工精度最高的是 DHTMLCONTROL Forms.HTML:Option.1 A 车床HTMLCONTROL Forms.HTML:Option.1 B 铣床HTMLCONTROL Forms.HTML:Option.1 C 镗床HTMLCONTROL Forms.HTML:Option.1 D 磨床二、机工(共4道题)1.卧铣与立铣的主要区别是 AHTMLCONTROL Forms.HTML:Option.1 A 卧铣时主轴与工作台平行，而立铣时主轴与工作台垂直HTMLCONTROL Forms.HTML:Option.1 B 卧铣时主轴与工作台垂直，而立铣时主轴与工作台平行HTMLCONTROL Forms.HTML:Option.1 C 卧铣时主轴与床身平行，而立铣时主轴与床身垂直HTMLCONTROL Forms.HTML:Option.1 D 卧铣时主轴与机床垂直，而立铣时主轴与床身平行2.铣削的主运动为 CHTMLCONTROL Forms.HTML:Option.1 A 工作台的纵向移动HTMLCONTROL Forms.HTML:Option.1 B 工作台的横向移动HTMLCONTROL Forms.HTML:Option.1 C 铣刀的旋转运动HTMLCONTROL Forms.HTML:Option.1 D 工作台的上下移动3.刨削加工中，常用来装夹工件的装置是 BHTMLCONTROL Forms.HTML:Option.1 A 回转工作台HTMLCONTROL Forms.HTML:Option.1 B 平口钳HTMLCONTROL Forms.HTML:Option.1 C 台虎钳HTMLCONTROL Forms.HTML:Option.1 D 三爪卡盘4.下列选项中表述不正确的一项是 CHTMLCONTROL Forms.HTML:Option.1 A 在机械加工中，主运动只有一个，而进给运动则可能是一个或几个HTMLCONTROL Forms.HTML:Option.1 B 在基本尺寸相同情况下，尺寸公差值越小，则尺寸精度越高 HTMLCONTROL Forms.HTML:Option.1 C 零件表面粗糙度Ra值愈小，其加工精度愈高 HTMLCONTROL Forms.HTML:Option.1 D 零件的加工精度越高，其加工成本越高1.机床代号B6065表示 AHTMLCONTROL Forms.HTML:Option.1 A 牛头刨床，最大刨削长度650mmHTMLCONTROL Forms.HTML:Option.1 B 牛头刨床，最大刨削长度65mmHTMLCONTROL Forms.HTML:Option.1 C 龙门刨床，最大刨削长度650mmHTMLCONTROL Forms.HTML:Option.1 D 龙门刨床，最大刨削长度6500mm2.铣削的主运动为 CHTMLCONTROL Forms.HTML:Option.1 A 工作台的纵向移动HTMLCONTROL Forms.HTML:Option.1 B 工作台的横向移动HTMLCONTROL Forms.HTML:Option.1 C 铣刀的旋转运动HTMLCONTROL Forms.HTML:Option.1 D 工作台的上下移动3.通常，在刨削加工中不需要加冷却液。这是因为 D HTMLCONTROL Forms.HTML:Option.1 A 工件材料的硬度较低，容易切削HTMLCONTROL Forms.HTML:Option.1 B 刀具材料的硬度较高，容易切削HTMLCONTROL Forms.HTML:Option.1 C 刨床加工零件的精度要求不高HTMLCONTROL Forms.HTML:Option.1 D 刨床切削速度较低4.下列选项中表述不正确的一项是 CHTMLCONTROL Forms.HTML:Option.1 A 在机械加工中，主运动只有一个，而进给运动则可能是一个或几个HTMLCONTROL Forms.HTML:Option.1 B 在基本尺寸相同情况下，尺寸公差值越小，则尺寸精度越高 HTMLCONTROL Forms.HTML:Option.1 C 零件表面粗糙度Ra值愈小，其加工精度愈高 HTMLCONTROL Forms.HTML:Option.1 D 零件的加工精度越高，其加工成本越高1.机床代号B6065表示 AHTMLCONTROL Forms.HTML:Option.1 A 牛头刨床，最大刨削长度650mmHTMLCONTROL Forms.HTML:Option.1 B 牛头刨床，最大刨削长度65mmHTMLCONTROL Forms.HTML:Option.1 C 龙门刨床，最大刨削长度650mmHTMLCONTROL Forms.HTML:Option.1 D 龙门刨床，最大刨削长度6500mm2.卧铣与立铣的主要区别是 AHTMLCONTROL Forms.HTML:Option.1 A 卧铣时主轴与工作台平行，而立铣时主轴与工作台垂直HTMLCONTROL Forms.HTML:Option.1 B 卧铣时主轴与工作台垂直，而立铣时主轴与工作台平行HTMLCONTROL Forms.HTML:Option.1 C 卧铣时主轴与床身平行，而立铣时主轴与床身垂直HTMLCONTROL Forms.HTML:Option.1 D 卧铣时主轴与机床垂直，而立铣时主轴与床身平行3.刨削加工中，常用来装夹工件的装置是 BHTMLCONTROL Forms.HTML:Option.1 A 回转工作台HTMLCONTROL Forms.HTML:Option.1 B 平口钳HTMLCONTROL For