1. Group 1 Electric motor B. S. Kim , J. Y. Kim , T. M. Kim , K. U. Min
D. H. Park , D.J. Bang , S.H. Yoon

2. ↙ ↘ Table of contents W H Y ? H O W ? Why engineer used the
manufacturing process? ↙
H O W ?
How are the manufacturing
process conducting ? ↘

3. Parts of manufacturing
Rotator
Fan
Fan cover
Support
Stator
Al cover
Bolt

4. Parts of manufacturing
CNC
Casting
Injection
Forging
Drawing

5. CNC Turning & Grinding process
Turning process

6. CNC Turning & Grinding process
Characteristic
Advantage
- Low size allowance
- Make various shape
Weakness
Low production speed
High unit cost of production

7. Forging & Tapping process
Heating

8. Forging & Tapping process
Cooling
Tapping

9. Forging & Tapping process
Characteristic
Advantage
- More detailed than sand mold casting
- Process the iron rapidly
- When mass producing → economical
Weakness
Die is very expensive
Make simple shape only

10. Die casting process
Cooling
Injection
Pour molten metal
Close the mold

11. Die casting process Characteristic Advantage Weakness
- Low cost, high production speed
- Make complicated shape
- The size is exact – quality is high
Weakness
Using the specific machine
Die is very expensive

12. Injection molding process
Cooling
Injection
Pour plastic powder
Close the mold

13. Injection molding process
Characteristic
Advantage
- Fast, using mass production
- Stable quality
- Can make complex shape
Weakness
Using the specific machine
Die is very expensive

14. Pull through the material
Wire drawing process
Pull through the material
Sprinkle the oil
Fit through the die

15. Wire drawing process Characteristic Advantage Weakness
- More detail than rolling process
- Make very thin wire
- Second process needless
Weakness
Die is very expensive
A by-product(chip) happens

16. Thank you