THIS PRESENTATION IS ABOUT THE BURNISHING PROCESS.BURNISHING IS A SUPER FINISHING PROCESS.WHICH IS A VERY IMPORTANT PROCESS IN PRODUCTION AND DEVELOPMENT OF A PRODUCT.THE PROCESS IS EXPLAINED IN SIMPLE WORDS AND IN UNDERSTANDABLE FORMAT. THE BURNISHING PROCESS IS VERY IMPORTANT IN INDUSTRYS

3. COLD WORKING, ALSO KNOWN
AS STRAIN
HARDENING OR WORK
HARDENING, IS
THE STRENGTHENING OF A
METAL BY PLASTIC
DEFORMATION

4. THE MICRO IMAGE OF A
METAL IS LIKE A MOUNTAIN
RANGE

5. BURNISHING IS THE
PLASTIC DEFORMATION OF
A SURFACE DUE TO
SLIDING CONTACT WITH
ANOTHER OBJECT.

6. • Visually, burnishing
smears the texture of a
rough surface and makes
it shinier.
• Burnishing may occur on
any sliding surface if the
contact stress locally
exceeds the yield strength
of the material.
• It is a super finishing tool
giving a mirror like finish.

7. MECHANICS
IF THE BALL IS PRESSED DIRECTLY INTO THE PLATE, STRESSES
DEVELOP IN BOTH OBJECTS AROUND THE AREA WHERE THEY
CONTACT. AS THIS NORMAL FORCE INCREASES, BOTH THE BALL
AND THE PLATE'S SURFACE DEFORM.

9. THE BALL WILL PLOW
THROUGH THE SURFACE
AND CREATE A TROUGH
BEHIND IT. THE
PLOWING ACTION OF
THE BALL IS
BURNISHING.

10. #BURNISHING

11. EXCESSIVE BURNISHING
LEADS TO SUB-SURFACE
CRACKS WHICH CAUSE
SPALLING, A PHENOMENON
WHERE THE UPPER LAYER OF
A SURFACE FLAKES OFF OF
THE BULK MATERIAL.

12. # LUBRICATION
THE PURPOSE OF THE
LUBRICANT IN THIS CASE IS
TO SEPARATE THE
COMPONENTS WITH A
LUBRICANT FILM SO THEY
CANNOT CONTACT TO
PREVENT DESTRUCTIVE
BURNISHING

13. THERE ARE
TWO TYPES
OF
BURNISHING

14. #BALL BURNISHING
#ROLLER BURNISHING

15. A BALL BURNISHING
TOOL CONSISTS OF ONE OR
MORE OVER-SIZED BALLS THAT
ARE PUSHED THROUGH A
HOLE.IT PLOWS MATERIAL OUT
OF THE WAY
#BALL BURNISHING

16. #ROLLER BURNISHING
ROLLER BURNISHING, OR SURFACE
ROLLING, IS USED ON CYLINDRICAL,
CONICAL, OR DISK SHAPED WORKPIECES.
THE ROLLERS TYPICALLY ROTATE WITHIN
A CAGE, AS IN A ROLLER BEARING.

19. BY :JOHNS JOSEPH