Volvo C30 2007 Service And Repair Manual page 94

Fig. 20: Identifying Welding Symbols
Courtesy of VOLVO CARS CORPORATION
There are a number of other assembly methods that are illustrated with the following symbols:
1. Spot weld/spot weld with the location of the weld and lens diameter specified with color (may be
replaced with 2)
2. Plug weld (may be replaced with 1)
3. Seam weld/Seam weld with weld length specified in mm
4. Step weld/Step weld with weld length followed by length between welds specified in mm. Always start
and finish with the weld.
5. Tack weld
6. Glue.
RESISTANCE SPOT WELDING
Resistance spot welding must primarily be used if the capacity of the welding equipment is matched to panel
thickness. When carrying out resistance spot welding, grind down to bare metal.
Clean the surfaces with Scotch-Brite or similar to minimize zinc and phosphating damage. Apply welding
primer between the panels.
NOTE: Always test weld in accordance with the method below. Always set the weld
according to panel quality
MAG WELDING
Punch replacement part for plug welding.
Select size of hole for plug welding according to the following panel thicknesses:
2012 Volvo C30 T-5
ACCESSORIES AND BODY, CAB Body Frame - General Information