【填空题】
23159.___内应力的重新分布会引起已加工完零件的相应变形,使零件丧失原有的加工精度。
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23160.___以碳化钨刀具铣削不锈钢材料之切削速度约为中碳钢材料的 3 倍。
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23161.___检查主轴机构的精度,不仅需检查静态条件下的精度,也需检查动态条件下的精
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23162.___逻辑探针是电子电路检修工具之一,在探针上的灯泡不同的显示方式,来指示电
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23163.___环行分配可用硬件或软件实现。
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23164.___在大批大量生产中,工时定额根据经验估定。
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23165.___职业道德的价值在于有利于协调职工之间及职工与领导之间的关系。
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23166.___压力继电器是一种将电信号转换成油液的压力信号的电液控制元件。
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23167.___闭环或定环伺服系统只接收数控系统发出的指令脉冲,执行情况系统无法控制。
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23168.___扫描仪中属于计算机辅助设计___中的输出系统,通过计算机软件和计算机, 输出设备___接口,组成网印前计算机处理系统,而适用于办公自动化___,广泛应用在标牌面板、印制板、印刷行业等。
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23169.___剖面图要画在视图以外,一般配置在剖切位置的延长线上,有时可以省略标注。
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23170.___职业道德对企业起到增强竞争力的作用。
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23171.___应尽量选择设计基准或装配基准作为定为基准。
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23172.___加工中心是备有刀库并能自动更换刀具,对工件进行工序集中加工的数控机床。
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23173.___组合夹具组装后重点是检验夹具的对定元件及定位元件间的平行度,垂直度,同轴度和圆跳动度相位精度。
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23174.___铣床虎钳于安装时,不须调整钳口与床台之平行度。
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23175.___箱体件的加工刀具不仅要通过专用刀具来制造精密孔,而且往往需要借助于这类
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23176.___整体式复合刀具由两个或更多相同或不同类型的刀具组成,如复合钻、复合扩孔钻、复合铰刀和复合镗铰刀等。
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23177.___组成零件轮廓的几何元素间的连接点称为节点。
【填空题】
23178.___数控加工程序中主程序可以调用子程序,子程序也可以调用子程序,这种编程方法叫做子程序的嵌套方法。
【填空题】
23179.___CAXA 制造工程师软件中“网格面”要求用 U 向和 V 向两组曲线构造。
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23180.___PRGRAM 表示在 MDI 模式下 MDI 的资料输入和显示。
【填空题】
23181.___DNC___称为分布式数控,是实现 CAD/CAM 和计算机辅助生产管理系统集成的纽带,是机械加工自动化的又一种形式。
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23182.___大多数箱体零件采用整体铸铁件是因为外型尺寸太大。
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23183.___多轴加工必须按照工艺顺序才能顺利加工完零件。
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23184.___精密盘形端面沟槽凸轮的划线应先划出实际轮廓曲线。
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23185.___切削加工中,由于传给刀具的热量比例很小,所以刀具的热变形可以忽略不计。
【填空题】
23186.___热处理工序主要用来改善材料的力学性能和消除内应力。
【填空题】
23187.___铣削高强度钢时,由于切削力大,容易引起硬质合金铣刀刀齿的崩刃,故一般采用 YT30 等牌号的刀具材料。
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23188.___镍基合金和钛合金材料的强度大、硬度高、耐冲击,加工中容易硬化,切削温度高,刀具磨损严重,且切削效率很低。
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23189.___某些精密滚齿机的分度蜗轮齿数取为 665 或者更多,其目的在于减小传动链中其余各传动元件误差对齿轮加工精度的影响。
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23190.___设备上的电气线路和器件发生故障,不必交电工,自己可拆卸修理。
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23191.___切削用量中,影响切削温度最大的因素是切削速度。
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23192.___激光干涉仪是以激光稳定的波长作基准,利用光波干涉计数原理进行精密测量。
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23193.___选择零件表面加工方法的要求是:除保证质量要求外,还要满足生产率和经济性等方面的要求。
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23194.___生产部门是指完成产品零件制造工艺过程的部门。主要由生产纲领决定。对于单件小批生产的车间,生产部门主要由各种形式的流水线生产组成。
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23195.___插补运动的实际插补轨迹始终不可能与理想轨迹完全相同。
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23196.___数控机床是在普通机床的基础上将普通电气装置更换成 CNC 控制装置。
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23197.___加工中心适宜于加工复杂、工序多,加工精度要求较高,且经多次装夹和调整的零件。
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23198.___一般加工中心具有铣床、镗床和钻床的功能。虽然工序高度集中,提高了生产效率,但工件的装夹误差却大大增加。
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23199.___四轴卧式加工中心是带有旋转工作台的 C 轴。
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