The document discusses wheel rims, including their importance, common materials used like aluminum alloys and steel, and production processes. It describes the key components of a wheel, like the rim and disk. Forging is outlined as the best method to produce wheel rims due to advantages like strength and lack of impurities compared to casting. The production process involves six steps: making the disk, rim, assembling them, and finishing.

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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