Sound Proofing / Insulation: Description and Operation

Sound Deadeners and Insulators


Welding Precautions - Steel

















WARNING:
- Invisible ultraviolet and infrared rays emitted in welding can injure unprotected eyes and skin. Always use protection such as a welder's helmet with dark-colored filter lenses of the correct density. Electric welding will produce intense radiation, therefore, filter plate lenses of the deepest shade providing adequate visibility are recommended. It is strongly recommended that persons working in the weld area wear flash safety goggles. Also wear protective clothing. Failure to follow these instructions may result in serious personal injury.

- On vehicles equipped with Safety Canopy(R) options, prior to carrying out any sectioning repairs near the roof line or sail panel areas of the vehicle, remove the Safety Canopy(R) module and related components. Failure to comply may result in accidental deployment or damage to the Safety Canopy(R). Refer to Restraint Systems Restraints and Safety Systems. Failure to follow these instructions may result in serious injury to technician or vehicle occupant(s).

NOTE: When carrying out test welds using MIG plug welding or STRW techniques, refer to the weld nugget chart above.

The correct equipment and settings must be used when welding mild or high-strength steel. MIG and STRW are the preferred methods. Surfaces must be clean and free of foreign materials.

- Correct eye protection must be worn.
- The correct protective clothing should always be worn.
- Adequate ventilation must be provided to avoid accumulation of poisonous gases.
- A test weld should always be carried out on a test sample.
- Use cleaning brushes and abrasive grinding wheels dedicated to the type of materials being welded.
- Follow equipment manufacturer's prescribed procedures and equipment settings for the type of welder being used. ER70S-3 or ER70S-6 wire are typically used for MIG welding steel.
- ER70-S-6 is the recommended wire specification to use when welding dual-phase steel components.
- Components made of dual-phase steel should not be heated to straighten or repair. New components should be installed if severely bent or kinked.
- Do not use Oxyacetylene equipment to weld dual-phase steel.
- Disconnect the battery ground cable.
- Disconnect on-vehicle modules and protect them from possible heat damage and electrical currents when welding.
- Corrosion protection must be restored whenever bare metal repairs are made. REFER to Restoring Corrosion Protection Following Repair.
- Adequate power supply needs to be used to make sure of correct equipment performance.
- Factory spot welds may be substituted with either STRW or MIG plug welds. Spot/plug welds should equal factory welds in both location and quantity. Do not place a new spot weld directly over an original weld location. Plug weld hole should equal 8 mm (0.315 in) diameter.
- Vehicles equipped with a safety canopy require removal of these components prior to any welding procedures being carried out in the roof-line or body side areas of the vehicle. REFER to Safety Canopy Module.