The document discusses automobile chassis frames. It defines a frame as the undercarriage or structure that supports the engine, cab, and body of a vehicle. There are three main types of frames: conventional frames with side members and cross members, integral frames where all components attach directly to the body, and semi-integral frames that have a partial front frame. The document outlines the functions of frames, provides examples of frame designs, and describes the materials, design considerations, and manufacturing processes involved in building frames, including cutting, bending, welding, and inspection stages. It concludes with details from a field visit to an automotive manufacturing plant.

2. Arun.M.Angadi
BE,Automobile

3. 1.Brief Introduction on topic
• Definition
• Types
• Functions
2.Design Details
• Design Information
• Material used
• Manufacturing Method
3. Field Visit
• Industry Details
• Manufacturing unit
• Type of Manufacturing
• Production Details

4. Definition;
• Frame is a under carriage or
structure that supports the
engine and cab(body)of the
automobile.
• It is made up of long two
members called side members
riveted together with the help
of number of cross members.
Dig of Automobile chassis Frame
Front cross
member
X-Member
Side Member

5. Functions of chassis Frame
• To carry load of the passengers
or goods carried in the body.
• To support the load of the
body, engine, gear box etc.,
• To withstand the forces caused
due to the sudden braking or
acceleration
• To withstand the stresses
caused due to the bad road
condition.
• To withstand centrifugal force
while cornering
Chassis Frame of Jeep

6. Types of Automobile chassis frames
There are three types of frames:
1.Conventional frame:
It has two long side members and 5
to 6 cross members joined together
with the help of rivets and bolts.
Frame Sections used in this type of
frame;
a. Channel Section - Good resistance to
bending
b. Tabular Section - Good resistance to
Torsion
c. Box Section - Good resistance to both
bending and Torsion
Uses: In Buses ,Trucks , Vans etc
Cont……….
Conventional
Frame

7. 2.Integral type of frame
• There is no frame and all the
assembly units are attached to the
body
• All the functions of the frame
carried out by the body itself.
Uses; In all Modern Cars,
3.Semi-Integral Frame
• In some vehicles half frame is fixed
in the front end on which engine
gear box and front suspension is
mounted.
• It has the advantage when the
vehicle is met with accident the
front frame can be taken easily to
replace the damaged chassis frame.
Uses; Tractors , Fiat Cars

8. Detail Procedure
 Material Details
 Design Details
 Manufacturing process
 Inspection

9. Material Details
Material selection of frame depends on:
 Type of Vehicle(Heavy , Light)
 Chassis Design (Engine Components location)
 Manufacturing Company
Recommended Materials:
 Cast Iron (for Heavy Vehicles)
 HSS ,Steel (Medium , Foreign Vehicles)
 Aluminum Alloys (Light Vehicles)

10. Design Details
Load Analysis:
Various loads acting on the frame are;
Short duration Load - While crossing a
broken patch.
Momentary duration Load - While taking
a curve.
Impact Loads - Due to the collision of the
vehicle.
Inertia Load - While applying brakes.
Static Loads - Loads due to chassis parts.
Over Loads - Beyond Design capacity.
Acting Loads
Frame

11. Manufacturing Process
o Drawing Projection
o Cutting
o Bending
o Welding
o Finishing & Inspection

12. 1. Drawing Projection
• Drawing is acquired from design department
• Marking is done according to design
• Allowances will be provided
• Further process will be carried out
Equipments Used
Design Software
Other tools used in Design Department

13. 2.Cutting
• It is process after drawing projection
• Cutting process is done according to marking
• Side members of frame are got by cutting the long
beam sections from a raw metal
Equipments Used
General cutting Machines
Specialized cutting Machines
CNC Cutting Machines
LAZER Cutting Machines

14. 3.Bending
• Bending process is carried out after cutting process
• Bending is done according to the angle specified.
• In frame, bending is done while fitment of cross
members.
Equipments Used
General bending Machines
Specialized bending Machines
CNC bending Machines

15. Field Visit
M.M Industrial controls
private ltd
Industrial area ,Garag Road
Dharwad
Visit
at;
Visit
on; 31/10/2011
Guided
By; M.Suresh
Engineer
M.M Industries

16. Industry Details
Organization name :M.M Industries
Location : Garag, Industrial Area
Type : Manufacturing &
Fabrication
Headed by :M.M Industrial controls
private ltd

17. Components Manufactured
Engine Cover
Earth Movers Cabin
Fuel Tanks
Silencer
Engine Cover

18. Manufacturing Details
Machines installed in Industry
CNC Laser Cutting Machine(Traumatic L 3020)
CNC Sheet Metal Cutting Machine
CNC Robot Welding Machine
Plasma Cutting Machine
Painting Section
High pressurized Spray Painting
Chemical cleaning

19. Laser Cutting Machine
Application: Metal cutting
with High Accuracy

20. Robot Welding Machine
Application: Welding is done
with high Accuracy & less
time

21. Bending Machines
Application: Bending is done any
angle with accurate Dimensions

22. Websites:
Wikipedia.com
Autopictures.com
Ask.com
Reference Books:
Automobile engineering – R.B.Gupta
Manufacturing procees – R.K.Jain