Week 7- Base Unit Design Challenges 2

Week 7- Base Unit Design Challenges 2

Aim - Design a Base Unit for the units designed for the above challenges with all weldments for the given Car Panel.

Theory :-

a base unit is a unit with plate of holes or T slots that can be served as the mounting point for supports, locators and clamps.

In this method, there is not much attention to use standard parts for clamps, supports, and locators.

Typical parts of the base unit :-

I) Base Plate :-

Base Plate is a machined plate made of steel or Aluminium of thickness 25mm to 40mm on which the holes are drilled to

mount diffrent units like rest units, clamp units, pin units etc.

II) Trunking Channel :-

Cable trunking is an enclosure usually with a rectangular cross section, and with one removable or hinged side, that is used

to protect cables and provide space for other electrical equipment. They make electrical ducting and cable trunking

for concealing and securing cabling.

Trunking Channel is a duct that carries all the electrical and pneumatic connections(wires and pipes) for units of the tool.

The standards of trunking sizes :-

50mm x 50mm

150mm x 75mm

75mm x 50mm

150mm x 100mm

75mm x 75mm

150mm x 150mm

III) Pedestal :-

* It is used to connect the base plate with a floor plate.

* The pedestal can be a standard part or a make part, depending on the size and height of the fixture.

VI) Eyebolt :-

Eye bolts used as a connection point for rigging, anchoring, pulling, pushing, or hoisting applications.

Although eye bolts are commonly used in BIW applications.

VI) Floor Plate :-

Floor plate is simple plate which holds the legs of BIW fixture to floor surface.

The base plate acts as an interface between the BIW fixture and the foundation, completing the load path into the floor.

Base plates help provide a uniform distribution of superstructure loads to the foundation

VII)Weld bar :-

A weld bar in a BIW fixture is a metal rod or bar that is used to hold the car body parts in place during the welding

process. The weld bar is usually attached to the fixture's base plate and is positioned to align with the joint

between two metal parts that need to be welded together

* Weld bars are used after the levelling is done by levelling screw.

*Weldbars are steel plates along the sides of the base plate of a pedestal.

*Weld bars are used to position the positions permanently.

Working Design Model