basic part of automobile wheel rims manufacturing is presented

1. P.Siddhartha
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2.  Importance of wheel rims
Metals used to make
 Different processes in use
 Best method of preparation

3.  The rim is the outer edge of a wheel, holding the tire It
makes up the outer circular design of the wheel on
which the inside edge of the tire is mounted on
vehicles such as automobiles.
 In the 1st millennium BC an iron rim was introduced
around the wooden wheels of chariots.

4. Consists of three parts
 Wheel base
 Rim
 spokes

5. Aluminium alloys and steel
 Aluminium has better qualities than steel like
 Strength
Heat resistance
 Better breaking system
 But cost is higher than steel

6. • Forging
• Casting
 Forging has more advantages when compared to
casting
 Forged rims can bear heavy load
 Forged wheels are free from pores and cavities
 Forged rims have better mechanical properties

7.  Follows 6 steps
 1.making wheel disks
 2.making wheel rim
 3.assembling disks into rim
 4.finishing

8.  initially pressures applied flat disk
by some series of
presses
 first press gives the center of disk
 For 1 inch 16 gauge steel 5 tons of
Pressure is required

9.  The windows are cut in disk by
second pressing on the rim
Windows give good look and
Strengthen the disk
 By third pressing the disk is
made into bowl shape and has
particular angles for particular designs
Holes are made around center disk
to mount it on vehicle

10.  The sheet metal is rolled
 by cold rolling process to remove
 excess material
 Then sheet is rolled into circular ring and
egdes are joined by welding
 The excess welding wastes are
scratched out

11.  The rim is forged into curved shapes
by using high pressures
 Then the rim is shaped by a series of
rollers to provide the rim a bead seat
to hold the bead wall of tire

12.  The rim and disk both are allowed to finishing
 Finishing gives a plain smooth view of rim and disk

13.  The disk is placed in rim and a high pressure is applied
on disk to get fit into rim
 Then the contact of both are welded together

15.  It may be carried out by automated machines or by
manual
 In automation the laser detects the flaws
 In manual a marking block is used to check the perfect
spherical shape rim

16.  There is a wide range of applications for wheel rims
especially in automobiles,they are heart of automobile
industry
 Instead of rims it is impossible to have great grip on
wheels and braking systems
 Even bicycles , motor cycles have rims as per the size
and shape of design
 Rails run on rail road on these rims which are more
stronger than actual rims

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