CHAPTER 3: SYSTEM CONFIGURATION
HF-2500A HIGH FREQUENCY WELD CONTROL
990-371 3-23
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.
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