制造工程与技术(热加工)英文版0 Introduction

Examples of forming:
drawn wire (拉拔线材）
cut
straight piece
bending and twisting （弯曲和扭转）
wire coat hanger
blank （毛坯）
part
Examples of forming:
rolled sheet （轧板）
Examples of shaping: A plastic coat hanger, is made by forcing molten plastic into a mold in the shape of the hanger.
plastic pellets
injection molding （注射/注塑成型）
furnace.
• Some manufacturing operations
• Long continuous products（连续型材）
– rolling（轧制）
– plates
– extrusion（挤压/挤出）produce – sheets
– drawing（拉拔）
– tubing
– bars with various cross-sections（横截 面）
materials
– bolts（螺栓）
Main Content in Part III
• the important factors involved in each forming and shaping process
• process variables（工艺变量/工艺参数） • characteristics of the machinery and the
• materials
– metallic materials （金属材料）
then cut into the
பைடு நூலகம்
– nonmetallic materials（非金属材料） desired lengths.
– including reinforced plastics（增强塑料）
• Other operations
Chapter 16
- material mainly undergoes tensile forces（拉力）
Chapter 18
Part III also describes: Ø processing of polymers（聚合物）, composites
（复合材料）, ceramics, and glasses; Ø rapid prototyping operations（快速原型技术）.
Chapter 19
Course Schedule (Week 11～14)
Introduction of Part III (1) Chap. 13 Rolling of Metals (2) Chap. 14 Forging of Metals (2) Chap. 15 Extrusion and Drawing of Metals (2) Chap. 16 Sheet-Metal Forming Processes (3) Chap 18 Forming and Shaping Processes of
What’s the difference?
Forming
l changing the shape of an existing solid body（实
体）
all called
workpiece, stock, or blank （毛坯/坯料/工件）
in the shape of a plate（板材）, a sheet （板料）, a bar（杆件）, a rod（棒材）, wire（线材）, or tubing（管件/管材）
what’s the difference between them? 4、What is bulk deformation processes? 5、What is the difference between bulk deformation
processes and sheet-forming processes ?
Plastics and Composite Materials (3) Chap. 19 Rapid-Prototyping Operations (1) Experiment （Chapter16）（2） Examination： Week 17
KEY TERMS
• forming 成形，变形
• workability 可加工性
• Formability 可成形性
Review Questions
1、What’s the difference between forming processes and shaping processes ？Give an example.
2、What’s the relation between workpiece and product？ 3、What do workability and formability mean? And
形/变形工艺）, such as rolling, forging, and
extrusion
Chapter 13/14/15
- material mainly undergoes compressive forces
（压力）
formability （可成形性）
- used for sheet-forming processes（板料成形/变 形工艺）, such as bending, stamping, stretch forming, and deep drawing
blanking （落料）
flat piece with suitable size
stamping （冲压）
metal body for an automobile
as strip（带料/条料） in coils（卷料/卷材）
blank （毛坯）
part
Shaping
l involve molding（模塑成型） and casting. – the resulting product is usually at or near the final desired shape; – may require little or no further finishing.
individual ingots cast （钢锭/铸锭）
slabs（板材）
rod（棒材） continuously cast pipe（管材）
- Then, formed by the deformation processes（变
形工艺） described in Part III：
cast structures（铸造组织/结构）
equipment
• An important consideration: Ø workability （可加工性） Ø formability （可成形性）
- meaning the maximum amount of deformation a material can withstand in a particular forming and shaping process without failure （失败）.
converted
wrought (“worked”) structures （锻造组织/结构）
l For metals ：
shaping
b. metal powders
parts
（金属粉末）
l For plastics（塑料）：
– pellets（颗粒）
shaping
– flakes （片）
– powder （粉末）
过滤器 火花塞
气门 挡风玻璃 仪表盘
天线
车身
车牌
轮毂盖 油盘 洗涤壶
弹簧
轮胎
尾灯 油箱 透镜
Figure III.1 Formed and shaped parts in a typical automobile
Initial Material (原材料）
l For metals ： a. molten metal
finial shape
Examples of shaping: • The white ceramic insulator（陶瓷绝缘体） for an
automotive spark plug – shaping clay in a mold – then drying（烘干） and firing（烧制） it in a
Manufacturing Engineering and
Technology -Hot Processes
Bilingual Course
• 教材及课件： English • 讲解：以中文为主 • 要求掌握：专业知识+英语 • 作业及考试：English • 考核方式：闭卷50%+开卷50% • 总评成绩：
考试成绩70%+出勤与作业20%+实验10%
学习方法： 课堂内容的理解+课后复习、作业
PART III
Forming and Shaping Processes
and Equipment
(成形/成型工艺与设备）
袁宁 Email：menyuan@scut.edu.cn Mobile：15902022369
parts
l For ceramics（陶瓷）：
– clays（粘土） and oxides（氧化物） shaping
– obtained from ores（矿石） or
parts
produced synthetically（合成地）
Forming Process（成形工艺） Shaping Process（成型工艺）
the workpieces and
products have a relatively
workability high ratio of volume（体
（可加工性）积面）积）to
surface area（表 or of volume to
thickness.
- applied to bulk deformation processes（体积成
• discrete（离散的/独立
– forging（锻造）
的） products
– powder metallurgy（粉末冶金） – most forming and shaping produce
processes for nonmetallic
– turbine disks（涡轮 盘）
– gears（齿轮）
• shaping 成型
• compressive 压缩的，受压的
• tensile
拉伸的，受拉的
• workpiece 工件
• stock
坯料
• blank
毛坯
• bulk deformation processes 体积变形工艺
• sheet-forming processes 金属板料成形工艺