Flow forming of tubes is an advanced version of metal spinning.it is the method of chip less forming.it has good dimensional tolerance.good flexibility.and moreover it has a lot of advantages in machining process.

2. 2
CONTENTS
INTRODUCTION
LITERATURE REVIEW
WORKING PRINCIPLE
CLASSIFICATION
ADVANTAGES/DISADVANTAGES
CONCLUSION
REFERENCE

3. 3
SL NO TITLE AUTHOR NAME YEAR
1.
2.
FLOW FORMING
OF TUBES
EXPERIMENTAL
STUDIES ON THE
CHARACTERISTIC
S OF FLOW
FORMED TUBES
B.S.PABLA
M.SIVANANDINI
S.S.DHAMI
M.SRINIVASULU
M.KOMARAIAH
C.S.KRISHNA
PRASAD
MAY 2012
OCT 2012
LITERATURE REVIEW

4. 4
INTRODUCTION

FLOW FORMING IS A MODERNISED,IMPROVED ADVANCED
VERSION OF METAL SPINNING.

CHIPLESS FORMING ,SPREAD IN 1950.

MATERIAL FLOWS IN BOTH RADIAL &AXIAL DIRECTION.

ACCURATE ,HIGH QUALITY,INCREASED MECHANICAL
PROPERTIES AND GOOD SURFACE FINISH .

5. 5
CONTD.....

IT IS A COLD METAL FORMING PROCESS FOR THE
MANUFACTURE OF ROTATIONALLY SYMMETRICAL
HOLLOW COMPONENTS

SIMPLE TOOL DESIGN MAKES- LOW TOOL COST

MANUFACTURING OF LIGHT WEIGHTED PARTS, ALSO IN
AEROSPACEINDUSTY...ROCKET NOSE CONES...

ALSO IN POWER TRAIN COMPONENTS AND WHEELS IN
AUTOMOBILE INDUSTRY

6. 6
CONTD.....

METAL SPINNING HAS LED TO EVALUATION OF FLOW
FORMING- THIKNESS CONTROL POSSIBLE

ROLLER FORCES SPECIMEN MATERIAL TO FLOW IN AXIAL
&MANDREL IN RADIAL DIRECTION

NEED SKILLED LABOURS...

7. 7
FORMING PROCESSES

MANUFACTURING PROCESSES

PLASTIC DEFORMATION OF MATERIAL, TO PRODUCE
SHAPE

NO MATERIAL IS REMOVED ,DEFORMATION OCCURS

EG: FORGING ,EXTRUSION,ROLLING

8. 8
WORKING PRINCIPLE
LENGTH OF WORK PIECE ..
L 1= Lo[{ S0 (D+ So)}/ {S1 (D
+S1) }]
WHERE ::
L1 IS THE WORKPIECE LENGTH.
Lo IS THE BLANK LENGTH
So IS THE INITIAL WALL
THICKNESS
S1 IS THE FINAL WALL
THICKNESS
D IS THE INTERNAL DIAMETER,
FR=RADIAL FORCE
FT=TANGENTIAL FORCE

9. 9
FLOW FORMING

EARLY USED TECHNIQUES ARE SPINNING$ DEEP DRAWING

BY THE ARRIVAL OF FLOW FORMING IT MADE A CHANGE
1. Low production cost.
2. Very little wastage of material.
3. Excellent surface finishes.
4. Accurate components.
5. Improved strength properties
6. Easy cold forming of high tensile strength alloys.
7. Production of high precision, thin walled seamless components.

10. 10
CONTD....
CYLINDRICAL HOLLOW PARTS WITH DIFFERENT STEPPED
SECTIONS CAN BE MADE
COMPRESSION BY THE AXIAL &
RADIAL FORCES.
BY ROLLERS AND MANDREL.
MATERIAL FLOWS PLASTICALLY IN
BOTH AXIAL &RADIAL DIRECTION.
RESULTS:: DIMENSIONALLY ACCURATED , INCREASED
MECHANICAL PROPERTY & GOOD SURFACE FINISHED

11. 11
METHODS OF FLOW FORMING

TUBE SPINNING
IN TUBE SPINNING TUBULAR OR CYLINDRICAL SHAPE IS
GENERATED
THE FINAL TUBE THICKNESS tf, IS DETERMINED BY
THE ROLLER-TO MANDREL SPACING.

12. 12
CONTD....

SHEAR SPINNING
IN SHEAR SPINNING CONICAL AND OTHER AXIS-SYMMETRIC
PARTS EX::
HEMISPHERICAL, HEMI ELLIPSOIDAL OR MORE COMPLEX
PROFILES ARE PRODUCED

13. 13
MATERIALS USED IN FLOW FORMING
• STAINLESS STEEL,
• CARBON STEET
• BRASS
• ALLOY STEEL
• NICKEL
• ALUMINUM
• TITANIUM
• COPPER

14. 14
TYPES OF FLOW FORMING

FORWARD FLOW FORMING

REVERSE FLOW FORMING

15. 15
FORWARD FLOW FORMING
USED IN COMPONENTS HAVING CLOSED OR SEMI
CLOSED END
MATERIAL IS MOVED AS SAME DIRECTION AS ROLLERS
 THE ROLLERD EVENTUALLY BE-COMING TRIM METAL
BEYOND THE FINISHED LENGTH.

16. 16
CONT....

DISADVANTAGE OF FORWARD FLOW FORMING IS THAT
THE PRODUCTION IS SLOWER

THE ROLLER MUST TRANSVERSE THE FINISHED LENGTH
OF THE WORK PIECE.

17. 17
REVERSE FLOW FORMING
USED IN COMPONENTS HAVING TWO OPEN ENDS
MATERIAL IS MOVED IN OPPOSITE DIRECTION OF
ROLLERS
FORCE APPLIED BY THE ROLLER PUSHES THE MATERIAL
TO THE RING
THE RING IS ROTATED BY MANDREL AND EXTRUSION
HAPPENS

18. 18
FORMING TECHNIQUES

IT IS A HIGH PRESSURE PROCESS

ROLLERS AND MANDRELS MUST MADE FROM
HARDENABLE STEEL

HEAT TREATED

19. 19
ADVANTAGES & DISADVANTAGES

ADVANTAGES

EXCELLENT SURFACE FINISH

INNOVATIVE CHIPLESS METAL FORMING TECHNIQUE

USED FOR THE PRODUCTION OF KEY COMPONENTS

USED IN AUTOMOBILE INDUSTRY

USED IN AEROSPACE INDUSTRY

20. 20
CONT....

DIS ADVANTAGES

FORM MICRO& MACRO CRACK

21. 21
CONCLUSION

FLOW FORMING IS AN INNOVATIVE TECHNIQUE

TO NOTICE MECHANICAL PROPERTY, IT HAS GREATER
POTENTIAL IN DEVELOPMENT

MANUFACTURE PARTS WITH HIGHER
ACCURACY,IMPROVED PERFORMANCE FOR GREATER
COMPLEX GEOMETRY,ASYMMETRIC PARTS

FLOW FORMING HAS BEEN DEVELOPED TO PRODUCE
PARTS WITH COMPLICATED GEOMETRY

22. 22
REFERENCES
K. LI, N. HAO, Y. LU, K. XUE, ―RESEARCH ON THE
DISTRIBUTION OF THE DISPLACEMENT IN
BACKWARD TUBE SPINNING, JOURNAL OF
MATERIALS PROCESSING TECHNOLOGY 79 (1998) 185–
188.
K.M RAJAN, P.U DESHPANDE ,EFFECT OF HEAT
TREATMENT OF PREFORM ON MECHANICAL PROPERTIES
OF FLOW FORMED AISI 4130 STEEL TUBES-A THEORITICAL
AND EXPERIMENTAL ASSESSMENT, JOURNAL OF
MATERIAL

23. 23
CONTD....

Z-H. SONG, W-M. LE, S-C. CHEN, W-B. GU, AND X-M.QIAN: J.
MATER. PROCESS. TECHNOL., 1992, VOL. 32, PP. 365–370.
K.S. LEE , M.O. LAI AND C.M. CHEN ICS. LEE ET AL. ―A
STUDY OF DUAL DIRECTIONAL FLOW-FORMED
POLYPROPYLENE PIPES , JOURNAL OF MATERIALS‖
PROCESSING TECHNOLOGY 48 (1995) 451-458 [15]

24. 24
QUESTIONS ?

25. 25