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【简答题】
车床类机床主要用于加工各种 ,如内外圆柱面、内外锥面和成形回转面等,有些车床还能加工 。 2 、C A6140 车床组成部件: 、 、 、 、 、 。 3 、 CA6140 车床可车削 ___________ 、 ____________ 、 __________ 、 ________ 四种标准的常用螺纹。 4 、基本组由 8 组传动比,分别是 ;增倍组有 4 组传动比,分别是 。 5 、扩大螺纹导程机构可使螺纹导正常导程扩大 倍或 倍。 6 、进给箱包括 、 、 及 。 7 、 溜板箱进给箱包含: 、 、 、 、 。 8 、 :指在调整好后无须工人参与便能自动完成表面成形运动和辅助运动,并能自动重复其工作循环的机床。半自动机床:指能自动完成预定的工作循环,但 。 9 、摩擦离合器除了靠摩擦力传递运动和转矩外,还能起 的作用。当机床过载时,摩擦片打滑,可避免损坏机床。 10 、CA6140车床为了避免光杆和快速电机同时传动给某一轴,应采用_________离合器;进给过程中为了避免进给力太大或刀架受阻碍而损坏传动机构,应设有_________离合器。 11 、为了避免损坏机床,在接通机动进给或快速移动时,开合螺母不应 ,反之,合上螺母时,也 机动进给或快速移动。 12 、CA6140主轴正转共有__24____种转速,其中低速有___18___种。 13 、只有当主轴处于 0-125r/min 时,才能加工放大螺距螺纹。
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反馈参考答案：
举一反三
【单选题】—Where is Ms Li? —She London.
A.
went to
B.
has went to
C.
has gone to
D.
has been to
【单选题】─By the way, where is Li Lei? ─ He ________ swimming. [ ]
A.
has been
B.
has been to
C.
has gone
D.
has gone to
【单选题】The room ______ empty because there has been no lightin it at night for a long time.
A.
should
B.
must
C.
wouldn’t
D.
can’t
【单选题】— By the way, where is Li Lei? — He ___ the bookstore. [ ]
A.
has been
B.
has been to
C.
has gone
D.
has gone to
【单选题】— By the way, where is Li Lei? — He ______ his library. [ ]
A.
has been
B.
has been to
C.
has gone
D.
has gone to
【单选题】The self-management factor consists of four behavioral dimensions. Which of the following was not one of the four dimensions? ( )
A.
Ethics and integrity
B.
Time management
C.
Developing others
D.
Flexibility and adaptability
E.
Self development
【简答题】听对话和短文，选择正确答案。 1. Where has Mr. Li been? [ ] A: He has been to Singapore. B: He has been to Korea. C: He has been to Japan. 2. How long has Mr. Li been away? [ ] A: Three months. B: Two months...
【单选题】Mr. Li ______ Paris. He ______ Paris for 3 weeks. [ ]
A.
has been to, has been to
B.
has gone to, has been in
C.
has been to, has been in
D.
has gone to, has been to
【单选题】—Is Miss Li in the office? —No, she ______ the classroom. [ ]
A.
has gone to
B.
has gone
C.
has been to
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