Week 4:- Pin Unit Design Challenge

*Designing different Pin Units for locating a panel in a BIW Fixture.

Given Component:

Types of Pin Units:

1. Fixed Pin Unit.

2. Retractable Pin Unit.

FIXED PIN UNIT

• Fixed pin units are used in a fixture to locate the car panel during any operation.

RETRACTABLE PIN UNIT

• Retractable pin unit is opposite to fixed unit which can be moved up and down up to a certain distance.
• It is used for unloading complex panels after welding.

The purpose of the pin unit.

• The fixed pin unit is used to arrest the 6 degrees of freedom of the assembly of a fixture. The other six degrees of freedom are arrested by the three rest units.
• Pins help to locate the part of an assembly very accurately for the welding operation.

The basic parts of the Pin unit are

• Pin
• Pin Retainer
• Shims
• Blade
• Block
• Riser

Designing 4 diff types of Pin Units:

1. Fixed Type Pin Units:

i.

ii.

2. Retractable Pin Units:

i.

ii.

Geometrical Tree Structure:

*Hence understanding the 3-2-1 Priniciple, the component has been arrested for 6 degrees of rotational motion. And the other 6 degrees of freedom comes with the addition of Clamp Units.