training report on manufacturing of ball bearing

1. A PRACTICAL TRAINING REPORT
ON
STEAL BALL MANUFACTURING
Presented To:-
Prof. Rajan Karir Sir
Presented By:-
Vinod Kumawat(14/477)
Department Of Mechanical Engineering
Rajasthan Technical University, Kota
National Engineering Industries
,Jaipur
FROM

2. WELCOME TO
NATIONAL ENGINEERING INDUSTRIES LTD., JAIPUR

3.  Founded by Mr. B.M. Birla in1946.
 Over 150 million bearings manufacturing
per year
 Sizes over 1000 different ranges of bearing
 Product –Automotive bearing, Railway
bearing, Axle boxes, Industrial bearing.
LATE MR.B.M BIRLA
 COMPANY PROFILE

4.  Department at NEI LTD ,Jaipur
Personnel Division
Taper Division
Research & Development Division
Machine Building
Large Diameter Bearing Division
Railway Division
Bearing Division
Ball Department
Ring Rolling Division
Quality Assurance
Metallurgy Division
Sales Department
Budget Department
Accounts Department
ERP/EDP

5. Types of bearing -
Bearings manufactured-
1. Ball bearing
2. Tapper bearing
3. Railways bearing(RBs)
4. Self-alignment bearing
5. Spherical roller bearing

6. FLASHING
SOFT
GRINDING
G-1
HEAT
TREATMENT TUMBLING
HARD
GRINDING
G-2
FINISH
GRINDING
G-3
ROUGH
LAPPING
L-1
Wire
BALL PROCESS LAYOUT
HEADING
FROM WIRE
HEADING
FROM WIRE
HEADING ON NATIONAL HEADERS GERMANY
HEAT TREATMENT ON STATE OF ART CHUGAI-RO FURNACE ,JAPAN
GRINDING & SUPERFINISHING ON NTN GRINDING & SUPERFINISHING M/CS,JAPAN
100 %SURFACE DEFECTS CHECKING
WELL EQUIPPED STANDARD ROOM FOR CHECKING ROUGHNESS ,ROUNDNESS & Db LEVEL

7. Manufacturing process- Ball

8. Manufacturing process- Ball continue……
Ultrasonic
Washing
Ball Inspection Visual Inspection &
Packing

9. 1.Heading
o Heading is a metalworking process which is also called
cold forging process.
o It is often performed in the cold state, resulting in
cold working.
o This operation typically produced raw balls.
o This operation is performed on the national
header Germany.

10. Heading continue………..
Raw balls

11. 2.Flashing
o Flashing machine is used to remove the
burrs or uneven surfaces.
o There are two cast iron steel plates with grooves.
o The raw balls are rotating in the grooves and
removes the burrs.

12. 2.Flashing continue……….

13. 3.Soft Grinding (G-1)
Flashing Soft Grinding
o The grinding wheel of grade-100 is used to finish the
surface up to (100±10µm) material is removed.
o The rotational speed is 90±10 rpm.
o Coolant used is Maxi grind(2-3%) with water.

14. 4.Heat treatment
o Heat Treatment of Steel can be heat treated to produce a great variety of
microstructures and properties.
 Furnaces widely used in heat treatment:-
Fig :- Chugairo furnace japan

15. 4.Heat treatment continue………
Parts of chugairo furnace:-
 Prewashing tank
 Hardening furnace
 Quenching oil tank
 Cooling and washing tank
 Tempering furnace

16. 4.Heat treatment continue………
Fig :- Chugairo furnace japan

17. 5.Tumbling
o Metal tumbling is used to burnish, deburr, clean,
radius, de-flash, descale, remove rust, polish,
brighten, surface harden, prepare parts for further
finishing, and break off die cast runners.
o The process is fairly simple: a horizontal barrel is filled
with the parts which is then rotated

18. 6.Hard grinding(G-2)
o The grinding wheel of grade-300 is used to finish the
surface up to(10±1µm) material is removed.
o The rotational speed is 90±5 rpm.
o Coolant used is Maxi grind(2-3%) with water.

19. 7.Finish Grinding(G2)
 The grinding wheel of grade-1000 is used to
finish the surface up to(100±10µm) material is
removed.
 The rotational speed is 70±5 rpm.
 Coolant used is MTO.

20. 8.Rough lapping(L1)
 The grinding wheel of grade-3000 is used to
finish the surface up to(1±.25µm) material is
removed.
 The rotational speed is 30±5 rpm.
 Coolant used is HONILO 981.

21. 9.Super finishing(L2/3)
 The grinding wheel of grade-6000 is used to finish
the surface up to(1±.25µm) material is removed.
 The rotational speed is 10-25 rpm.
 Coolant used is HONILO 981.
Super finished balls

22. Fig:-Super Finishing

23. 10.Inspection
Inspection by aviko machine
1.Vibration test
2.Eddy current test
3.Optical test
Fig:-Aviko machine

24.  Ultrasonic washing

25. Visual inspection

26. Final Balls