机械专业英语课件.ppt

Warming up exercises
4. 硬度
1. pure metal 2. pound
3. plastic deformation 4. stainless steel
5. melting temperature 6. heat treatment
7. solid solution 8. hypoeutectoid steel
9. lever-law 10. iron—carbon diagram
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Unit 3 Casting Processes
I. New words and phrases
Ⅰ) New words
•casting 铸造,铸件•cavity 型腔
•bronze 青铜•brass 黄铜
•pattern 木模• sprue 直浇道
•core 型芯•riser 冒口
•cope 上箱•drag 下箱
•vent 通气孔• dendrite 树枝状结晶
• tolerance 公差•
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Unit 3 Casting Processes
Ⅱ) phrases
sand casting 砂型铸造
•investment casting 熔模铸造
•centrifugal casting 离心铸造
•mold cavity 铸型型腔
•core print 芯头
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Unit 3 Casting Processes
gating system 浇铸系统
pouring cup 浇口杯
surface finish 表面质量
parting surface 分型面
two-part mold 两厢造型
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Unit 3 Casting Processes
built-up 混合的
•alignment pin 定位销
•wall-thickness 壁厚
•ID --- inside diameter 内径
•OD---- outside diameter 外径
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Unit 3 Casting Processes
II. Guide for Reading
After reviewing the printed material, the students will learn the essentials of the various metal casting processes used in industry today.
• basic principles of casting are explained.
• three primary casting methods are detailed.
• and pattern construction is shown.
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Please watch the video and answer the following questions.
Please pay to attention to these key words:
Pattern, injection molding; assemble; wax post; runner system; pouring cup; shell mold; dip; slurry; smoothness; subsequent dip; furnace; autoclave; moisture; cured ceramics; preheated to pouring; ferrous and non-ferrous metals; solidify; close tolerance; Thin wall; and smooth finishes.
to make the pattern?
assemble the pattern on wax post?
the