【单选题】【消耗次数:1】
车床上安装镗孔刀时,刀尖低于工件回转中心,其工作角度将会比标注角度()。
前、后角均变小
前、后角均变大
前角变小,后角变大
前角变大,后角变小
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相关题目
【单选题】 车床上安装镗孔刀时,刀尖高于工件回转中心,其工作角度将会比标注角度()。
①  前角变大,后角变小
②  前、后角均变大
③  前角变小,后角变大
④  前、后角均变小
【单选题】 车床上安装镗孔刀时,刀尖低与工件回转中心,其工作角度将会比标注角度()
①  前、后角均变小
②  前、后角均变大
③  前角变小,后角变大
④  前角变大,后角变小
【判断题】 外圆车刀装得低于工件中心时,车刀的工作前角减小,工作后角增大。
①  正确
②  错误
【单选题】 颈前三角和颈后三角划分的标志是()
①  肩胛舌骨肌
②  颈血管鞘
③  副神经
④  前斜角肌
⑤  胸锁乳突肌
【判断题】 β称为螺旋生角,它使刀具的工作前角增大,工作后角减小,该说法( )
①  正确
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【单选题】 刀具后角的正负规定:后刀面与基面夹角小于 90o 时,后角为( )。
① 
② 
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①  小于
②  大于
③  等于
④  与刀具材料无关
【判断题】 发动机点火提前角由基本点火提起前角和修正点火提前角组成。()
①  正确
②  错误
【判断题】 由于硬质合金的抗弯强度较低,抗冲击韧性差,其合理前角应小于高速钢刀具的合理前角。
①  正确
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【多选题】 气门重叠角等于下列哪些角度之和?()
①  进气提前角
②  进气迟后角
③  排气提前角
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