Body Material and Body Trim

8/12/2019 Body Material and Body Trim

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Body material and trims

4/2/2014 1Paramjeet Singh (AP MRIU)


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Properties and materials used in the

automotive industry

Performance /cost

Strength and weight

Surface quality and formability

Free of irregularities and defects

Elastic properties

Resistance to corrosion

The weldability

Tenacity

4/2/2014 Paramjeet Singh (AP MRIU) 2


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Selection of materials

Despite the threat of other materials, steel sheet maintains a

prominent role.

Steel plate remains a principal material for construction of

bodywork of a car

Main characteristics of the automotive plate must be

achieved implementing steel plates, aluminum or elements of

lightweight plastic



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Vehicle properties



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Consideration for technology development



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Materials



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Plastics



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Cont.


The use of plastics for this purpose has the following

inconvenients :

Difficulty in getting a good finish, but that tends to deteriorate

over time;

Conservatism in the use of steel;

Repair harder and more expensive;

Inconsistent quality in large series particularly when molding

techniques require labor-intensive; Some plastics are not recyclable (thermosets).


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Aluminium


The main thing that leads to the use of aluminum for carryingout car plates based on

the considerable reduction in vehicle weight.

But the steel compared to aluminum has additional advantages

such as; lower material cost;

lower manufacturing cost;

use existing manufacturing techniques;

better weldability; better embedding;

Better ability to be painted.


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Steel


Basically, the steel is still have the following advantages:

Relatively inexpensive material;

Can be shaped plastically in complicated forms;

Can be soldered in a a single block of high rigidity; Resistance to bending and torsion;

Ability to absorb energy in a state of plastic clash;

Can get good surface finishes with coatings and paints used.

These characteristics have to do partly with the high modulusof elasticity and the characteristics of strength and ductility of

the steels used.


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Composites or GRP

Benefits of Composites

Lightweight

High Strength

Corrosion and Chemical Resistance



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BODY TRIM PACKAGES

Typical elements that may be included in a trim package

include:

Special paint, some with the appearance of pearl, others

showing color variations depending upon light angle Paint patterns using multiple colorstwo-toneor three-tone

(out of current favor)

Aluminum, plastic, or Stainless Steel trim to divide paint

regions (out of current favor) Applied graphics on Printed plastic sheeting with adhesive

backing


R d f d i l


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Road safety and environmental

benefits by IAP

Pin striping, usually applied as a dealer add-on using

special plastic tape and a removable backing

Plastic Bumpers painted the same color as the vehicle

body, rather than a matte black (now mostly included inthe base level vehicle)

Plastic rub strips to reduce paint and metalwork damage

from adjacent car doors that are carelessly opened

Interior upholstery materials specific to the package;leather in whole or part is often used in high-end trim

packages



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Cont

Wood-patterned plastic or applied surfaces in the interior

or exterior; applied surfaces are out of current favor as

they require careful design and application and lack

translucency

Genuine wood trim, rare but used in some high-end

applications

Exterior Vinyl proof covers, simulating the appearance of

a convertible(out of current favor)


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