1. CONDUCTING WORK WITH GRINDING MACHINE
Basic competence : Operating grinding machine

2. Explaining How to Set Machine
Grinding Flatten Surface
Basic competence
Explaining How to Set Machine
After studying this basic competence, students are expected to be able to conduct grinding flatten surface

3. Grinding Flatten Surface
Type of surface grinding machines used consists of four. They are:
Axis of Horizontal uses millstone. Desk movement back and forth, cross and downward feeding by millstone
Axis of Horizontal by using rotary table
Vertical axis uses special millstone. Desk movement is equal to horizontal machine
Vertical axis uses rotary table

4. Millstone feeding spindle Constrictor of machine desk step
Hydraulic system
Spindle controlling up and down motion of machine desk
Spindle controlling right-left motion of machine desk
Lever controlling machine desk
Control panel
Desk Machine
Main Head
( Taufiq Rochim : 1993)

5. The Process of Grinding
Choice of Millstone
Physical work object
Many materials must be grinded and needed the final result
Bow touch grinding
Hardness of millstone
Spinning Speed of millstone
Bow touch little
Bow touch large
( Taufiq Rochim : 1993)

6. Grinder Electric Switch
Operating the Surface Grinding Machine
Main switch
this function of main switch is to
connect electric current
of electrics fish-nets with machine
Grinder Electric Switch
( Taufiq Rochim : 1993)

7. The direction of desk movement.
The main movement of the surface grinding machine
a) Spinning motion of millstone
b) Desk Movement vertical and horizontal
c) Feeding movement
The direction of desk movement.
( Taufiq Rochim : 1993)

8. L = l + (2.15) mm Where: L = the length of long motion ( mm)
l = the length work object ( mm)
= the distance of millstone edge
from work object edge ( mm )
Long step
( Taufiq Rochim : 1993)

9. The length of cross step
c = A + ( 4 / 3 . b)mm
Where:
c = the length of cross motion ( mm)
A = the width of work object ( mm)
b = the thick of millstone ( mm )
The length of cross step
( Taufiq Rochim : 1993)

10. Where:
l = the length of work object ( mm)
L = the length of grinding ( mm)
i = the number of feeding
v = speed of desk motion ( m / minute)
b = the thick of work object ( mm)
B = the thick of grinding / B = b ( mm)
s = feeding from other side ( mm / step
Grinding circle
( Taufiq Rochim : 1993)

11. Surface Grinding theoretically have machine time
which is quicker to be compared to grinding circle
Surface grinding.
( Taufiq Rochim : 1993)

12. For the grinding of flimsy materials using magnet desk
( Taufiq Rochim : 1993)

13. SURFACE GRINDING (VIDEO)

14. SURFACE GRINDING (VIDEO)

15. Formative Test Mention the types of grinding surface used!
Explain main Movement of surface grinding!
Mention parts of surface grinding!
An iron box has 750 mm in length to be grinded by 4th feeding. Speed of desk motion is 2 m / minute. Count the grinding time!
An iron box, length 190 mm and width 150 mm which will be grinded. with number of feeding is 4 times, the width of millstone is 20 mm, feeding aside 6 mm / step, speed of motion desk is 2 m / minute. Calculate grinding time!

16. Resume 1. Some types of surface grinding machine
2. Choice of millstone matching with materials type
3. Main switch represent link of electric current
4. main movement of surface grinding machine
5. grinding surface and circle

17. BIBLIOGRAPHY
Taufiq Rochim, (1993). Teori & Teknologi Proses Pemesinan. Bandung: Proyek HEDS.
The Hong Kong Polytechnic University, 2007, Basic Machining and Fitting.

18. Thanks
Presented by:
Syaiful Anang, S. Pd.