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CHAPTER 3: SYSTEM CONFIGURATION
HF28 DC RESISTANCE WELDING SYSTEM
990-372 3-21
Upslope/Downslope Weld Profile
Applications

Round or non-flat parts and most resistive materials.
Description
Upslope allows a gradual application of weld energy which permits the parts to come into better
contact with each other reducing the electrode to part contact resistances. Upslope can allow a
smaller electrode force to be used, resulting in a cleaner appearance by reducing electrode
indentation, material pickup and electrode deformation. It can also be used to displace plating
and/or oxides, reduce flashing and spitting, or reduce thermal shock when welding parts containing
glass-to-metal seals.
Downslope (annealing) assists in the grain refinement of certain heat-treatable steels, and prevents
cracking in aluminum and other materials by reducing the cooling rate. Annealing is not typically
used for welding small parts.
Upslope / Downslope Weld Profile
Dual-Pulse Weld Profile
Applications

Flat-to-flat parts.

Round-to-round parts.

Round-to-flat small parts that may or may not be plated.
Description
Adding upslope to the front of both weld periods allows a reduction in electrode force, this results
in a cleaner appearance by reducing electrode indentation, material pickup and electrode
deformation.