机械专业英语期末考试题及答案

1、机械专业英语期末考试题及答案1 词汇翻译 画法几何 descriptive geometry机械制图 Mechanical drawing投影 projection视图 view剖视图 profile chart 标准件 standard component零件图 part drawing装配图 assembly drawing尺寸标注 size marking技术要求 technical requirements 主轴 spindle主轴箱 headstock卡盘 chuck加工中心 machining center车刀 lathe tool 车床 lathe钻削 镗削 bore车削 tur

2、ning磨床 grinder基准 benchmark钳工 locksmith 机螺纹 thread 电一体化 mechanotronics mechanical-electrical integration 精加工 finish machining粗加工 rough machining变速箱体 gearbox casing 表面粗糙度 surface roughness2 将下列短语译成汉语1. the fatigue loading（疲劳载荷）2. the radial loads（径向负荷）3. the thrust loads逆负荷4. the ball bearing球轴承5. the

3、 roller bearing滚子轴承6. the single-row bearings单沟轴承7. the double-row bearing双沟轴承8. the needle bearing滚针轴承9. the bearing life轴承寿命10. The rating life额定寿命11. the axis of rotation旋转轴12. The helix angle螺旋角13. a right-hand helix 右旋14. a left-hand helix左旋15. an involute helicoids螺旋面16. an involute curve渐开线17

4、. the shaft centerlines轴中心线18. worm gear蜗轮19. the hypoid gear准双曲面齿轮20. right angle直角21. worm gearing蜗杆传动22. the lead angle导角23. shaft angle轴线角度24. bending load弯曲载荷25. tension load张力负荷26. compression load压缩负载27. torsional load扭转负荷28. the bending moment弯矩29. the bending stress弯曲应力30. 30.four-bar linka

5、ge（四连杆机构）3 翻译下列句子1. The simplest closed-loop linkage is the four-bar linkage, which has three moving links (plus one fixed link) and four pin joints.（最简单的封闭式的连杆机构就是四杆机构，四杆机构有三个运动构件（加上一个固定构件）并且有四个销轴。）2. Although the four-bar linkage and slider-crank mechanism are very useful and found in thousands of

6、 applications, we can see that these linkages have limited performance level.( 虽然四杆机构和曲柄滑块机构是非常有用而且在成千上万的应用中都可找到。但是我们还看到，这些连杆机构其性能水平的发挥已经受到限制。)3. The process of drawing kinematic diagrams and determining degrees of freedom of mechanisms are the first steps in both the kinematic analysis and synthesi

7、s process.（画运动图和确定机构自由度的过程，就是运动分析和综合过程的第一个阶段。）4. The ability to visualize relative motion, to reason why a mechanism is designed the way it is, and the ability to improve on a particular design are marks of a successful kinematician.（设想相对运动的能力，能推想出之所以这样设计一个机构的原因和对一个具体设计进行改进的能力是一个成功的机构学家的标志。）5. Kinem

8、atic inversion is the process of fixing different links of a chain to create different mechanisms.（这个过程的动态反演是固定的,不同的连接创造出不同的机制。）四翻译下列短文1.A kinematic chain is a system of links, that is, rigid bodies, which are either jointed together or are in contact with one another in a manner that permits them t

9、o move relative to one another. If one of the links is fixed and the movement of any other link to a new position will cause each of the other links to move to definite predictable position, the system is a constrained kinematic chain. If one of the links is held fixed and the movement of any other

10、link to a new position will not cause each of the other links to move to a definite predictable position, then the system is an unconstrained kinematic chain.（运动链是一个构件系统装置即若干个刚体，它们或者彼此铰接或者互相接触，方式上是允许它们彼此间产生相对运动。如果构件中的某一构件被固定而使任何其他一个构件运动到新的位置将会引起其他各个构件也运动到确定的预期的位置上的话，该系统装置就是一个可约束的运动链。如果构件中的某一构件仍保持固定而

11、使任一运动到达一新的位置而不会使其他各个构件运动到一个确定的预期的位置上的话，则该系统装置是一个非约束运动链。）2. A mechanism or linkage is a constrained kinematic chain, and is a mechanical device that has the purpose of transferring motion and/or force from a source to an output. A linkage consists of links (or bars), generally considered rigid, which

12、 are connected by joints, such as pin (or revolute) or prismatic joints, to form open or closed chains (or loops). Such kinematic chains, with at least one link fixed, become (1) mechanisms if at least two other links remain mobility, or (2) structures if no mobility remains. In other words, a mecha

13、nism permits relative motion between its rigid links; a structure does not. Since linkages make simple mechanisms and can be designed to perform complex tasks, such as nonlinear motion and force transmission, they will receive much attention in mechanism study.（机构或连杆构件是一个可约束的传动链而且是一个从输入到输出以传递运动和（或）力为目的的机械装置。连杆机构是由通常被认为是刚体构件或杆组成的，它们