Week 4:- Pin Unit Design Challenge

Objective

 Design 2 Different types of Fixed Pin Unit & 2 Different types of Retractable Pin with Different Pins, Riser, Blade, and Block.

Pin unit

Pin unit is used to lock the rotational position of panel. Round Pin is used to control panel in two directions while Diamond Pin is used to control panel in one direction.

Types of pin unit

1.Fixed pin unit

A pin unit in which pin's position is fix, is called Fixed Pin Unit. Pin unit is used to lock the rotational position of panel. Round Pin is used to control panel in two directions while Diamond Pin is used to control panel in one direction.

2. Retractable pin  unit

Retractable Pin unit consist one Pin cylinder which operates the pin in one direction. In this unit Pin is directly mounted on the cylinder and it is must to have pin and cylinder  with the hole or slot of the panel. Pin cylinder is controlled in two directions with the help of shimming. 

Parts of pin unit

Pin: 

Pins are used to locking the rotational movement of the panel. Generally there two types of Pins, one is Round Pin and another one is a Diamond pin

Pin Retainer:

Pin Block is also called Pin Retainer. This block holds the pin and restricts the rotational motion of the pin.

Shims:

Shims are typically used in order to support, adjust for better fit, or provide a level surface. Shims may also be used as spacers to fill gaps between parts subject to wear.

L blocks:

L blocks are mounted on any block or plate with Shimming, So that height of mylar can be adjusted accordingly at the assembly level.

Blades

Blade is a part like a plate,which connects the parts of a unit to a riser. In general, the blade can either be make part or a standard part.

Riser

The part which is mounted on the base plate and holds a clamp or pin cylinder on it, is called Riser.

Design methodologies

• It is necessary to have two pins to locate a car panel. One pin must arrest 4 ways and the other must arrest 2 ways of a car panel.
• Pin should engage 3 - 5 mm from car part entry surface.
• All pins should be accommodated with 2 ways adjustable shims irrespective of direction of arresting.
• Round pin should be used in case of 4 way arresting of car part if the hole is round.
• Round pin should be used in case of 2 way arresting of car part if the hole is slot.
• Diamond pins can be used for 4 way arresting of car part only if the hole is round.
• Diamond pins can be used for 2 way arresting of car part only if the hole is slot.

Design of Fixed Pin unit

4 Way fixed pin unit ( L type-Riser)

2 Way fixed pin unit ( T-type riser)

Design preview

Design of Retractable Pin unit

4 Way Retractable pin unit ( T-type riser)

2 Way Retractable pin unit ( L type-Riser)

Design preview

Tree structure

Conclusion

Thus we designed  2 Different types of Fixed Pin Unit & 2 Different types of Retractable Pin with Different Pins, Riser, Blade, and Block.