1. Opening Weld Spots (Resistance Pressure Spot Welding)

Sheet steel panels made from high- and super-high-strength materials make great demands on the tools used.

Only with special carbide milling cutters can weld spots be drilled out on these sheet panels.

Use BTR/BOR milling cutters only in conjunction with Vario Drill spot-weld remover.

• Procedure: 

  If necessary, surface-grind existing unevenness with a belt or angle grinder in the area around the weld spot.

  Set punch mark in center of weld spot. Set 8 mm dia. weld spot drill bit on punch mark and drill through top metal sheet.

  NOTE: Because the weld spots may have surface-hardened, grind them if necessary with an angle grinder and paper grinding disk.

  Use a chisel to separate the sheet metal flange and remove the component.

  Follow the special procedure for SPOT WELDS .