Preparation (page 2 of 2)

CAUTION

• Do not overgrind on the metal base: this would reduce the thickness of the metal sheet and may adversely affect the welding strength.
• Thoroughly clean the metal dust from the ground surfaces and surrounding areas.
• Metal dust reduces welding strength and can lead to corrosion.

b. Straighten the buckled areas using a hammer and dolly block.

Tools required:

• Hammer
• Dolly block.

CAUTION:

• Ensure that even the slightest buckling is removed, particularly on the inner panels or in hidden positions.
• Otherwise problems may arise during assembly operations, in addition to a reduction in strength due to the concentration of stresses.
• Carefully inspect the joint areas of each pillar.

c. Remove the from the edges and from the welding surfaces.

Tools required:

• Rotary brush.
• Belt sander
• Disk sander

d. Apply electrically-weldable protections on the edges of all the panels to be spot-welded.

NOTE: In certain areas it is necessary to use high thickness electrically-weldable protections to obtain sealing between the edges as well as protection.

e. If the components are to be partially replaced, maintain an overlapping tolerance of appr. 50 mm during cutting of the damaged parts, to have a large enough mating surface.