Week 1:- Introduction to BiW and Fixtures Challenge

1. What is BIW & define its parts?

Body in white (BIW) refers to the stage in the automobile manufacturing in which a car body's components have been joined together, using one or a combination of different techniques: welding (spot, MIG/MAG), riveting, clinching, bonding, laser brazing etc. BIW is termed before painting and before the motor, chassis sub-assemblies, or trim (glass, door locks/handles, seats, upholstery, electronics, etc.) have been assembled in the frame structure.

BIW parts are categorised as below

1. Underbody structure
2. Frond end structure
3. Body side structure
4. Closure
5. Roof

2. What do you understand by BIW nomenclature?

BIW is termed before painting and before the motor, chassis sub-assemblies, or trim (glass, door locks/handles, seats, upholstery, electronics, etc.) have been assembled in the frame structure.

3. What is fixture & its types?

A fixture is the device which holds the work piece to be processed (welded) by using 3-2-1 principle.

BIW Fixture Types

1. Production Fixtures
2. Pre-Production Operation Fixtures
3. Checking Fixture

4. What is the basic principle of fixture design?

The jig and fixture are tools used for holding the work piece in a correct location for mass production. Various types of fixtures (like drilling fixtures, milling fixtures, and welding fixtures) are used in industry. The 3-2-1 method is the fundamental principle for all types of fixture design.

• Meet the course workpiece positioning stability and reliability.
• In order to ensure the construction of the workpiece on the jig and fixture carried over,there must be sufficient bearing or clamping force.
• meet clamping process is simple and quick operation;
• consumable parts must be able to quickly replace, the best do not need to use other tools.
• meet the jig and fixture in the adjustment or replacement process is repeated positioning reliability.
• As much as possible to avoid complex and expensive.
• As much as possible to select a reliable quality standard component parts on the market.
• meet national or regional safety laws and regulations.
• The jig and fixture design follows the manual,pneumatic, hydraulic, servo sequentially preferred principles.
• Formed serialization and standardization within the company product.

5. Elaborate types of BIW Stations?

BIW Station is the part of BIW assembly line. The BIW assembly line is divided into zones & these zones are again divided into stations. The BIW stations are further divided into following

1) Tool stations

2) Gripper stations

3) Stand station

4) Miscellaneous stations

Tooling Station: -

• Geo Fixtures
• Re-spot Fixtures
• Marriage Fixture
• Framer Fixture
• Checking Fixture

Gripper Station: -

• Material handling gripper
• Process grippers
• Combo Gripper
• Dual Gripper

Stand Station

• Pedestal stands
• Gluing & sealer stand
• Docking stand
• Date stamp stand

Miscellaneous stations

• Curing
• Buffer stand
• Take out trolleys
• Conveyor

6. What are the basic terminologies used in the BIW fixture?

• Reed switches & sensors
• Class A Surface/Skin surface
• Pivot
• Clamp Arm
• CMM
• Rough locators
• Blade
• Shims
• Risers
• Principle locating point