机械专业英语考试重点

解释：金属可分那两大类ferrous metals nonferrous metals

✓ CAD\CAM全称Computer-aided design Computer-aided manufacturing

✓ 齿轮的种类Spur gear Helical gear

✓ 铸造工艺包括几步Make molds Prepare and melt the metal Pour the metal into the molds Clean the castings

✓ 列举几种机械零件Gear Key Shaft Screw Cam Bearing Spring Worm gear set ✓ 皮带传动是否精确？为什么Inaccuracy, belt drives depend on friction on the pulleys and some slippage is inherent in their operation.

1、柔性系统的主要功能To create the cells from which the system is tobe constructed.

2、金属分为哪两类Simple metals Alloys

3、热处理的类型Annealing 退火Tempering 回火Quench 淬火Normalizing 正火

4、热加工工艺有哪些Casting 铸造Forging 锻造Welding焊接

5、传动扭矩的键包括Square key 方键Tapered key 锥形键Woodruff key 半圆键

6、车床的主要部分Head stock 主轴箱Tail stock 尾座Tool post刀架cross-slide横向托板

7、主轴箱内有哪些部件机构Driving 驱动Gear mechanism 齿轮装置Spindle 卡盘

8、龙门刨床的构件the bed the table the column the crossrail the tool head

9、尺寸标注有哪几种unilateral tolerancing bilateral tolerancing limit dimensioning

10、FMS的主要功能to creat the cells from which the system is to be constructed

11、铸造工艺包括哪些make molds prepare and melt the metal pour the metal into the molds clean the castings

12、铣床的主要部件starting lever spindle column knee elevating screw table index heed speed lever feed lever

13、塑料的优缺点plastics tend to be resistant to inorganic acids, but can be dissolved r deformed by solvents.most plastics are less rigid than metals, while plastics are very light. Most plastics do not conduct heat or electricity readily plastics soften slowly and can easily be shaped while they are soft.

✓ 刀具磨损的类型Flank wear 后刀面磨损Crater wear 前刀面磨损Notch wear V形凹口磨损Brittle fracture/edge chipping 已解决的磨损形式

✓ 钢的力学性能Strength强度Stiffness刚度Ductility 延展Impact strength冲击强度Hardness硬度Toughness韧性

翻译：对于深沟球轴承，沟槽的深度大约是球直径的1/4 In deep-groove ball bearings, the races沟槽are approximately one fourth as deep as the ball diameter.

✓ 把金属件连接在一起的方法有很多，用哪一种方法要根据金属的种类和要连接的焊件的种类来定There are a number of methods of joining metal articles together, depending on the type of metal and the strength of the joint which is required.

✓ 软焊是要用熔融状态下的第三种金属来使两件金属连接在一起的工艺

Soldering is the process of joining two metals by a third metal to be applied in the molten state.

✓ 力学性能是材料施加压力的反应特性

Mechanical properties are the characteristic responses of a material to applied forces.

✓ 用于冷作加工的机器叫压力机

The machine used for most cold-working operations is known as a press.

1、作为一种形状制造方法，切削是所有制造过程中最普遍使用的。而且是最重要的方Machining as a shape-producing method is the most universally used and the most important of all manufacturing processes.