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Unitek HF2/230 User Manual
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MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY990-057 6-1CHAPTER 6ADVANCED WELD FUNCTIONSWeld FunctionsA weld function is a unique heat profile created by weld current, voltage, or power that is applied over afixed time period, to resistance weld different parts. Welding applications requiring the use ofspecialized weld functions include: (a) parts plated with cadmium, tin, zinc, or nickel; b) parts withheavy oxide coatings such as aluminum; (c) parts that are round or not flat; or (d) parts made ofrefractory metals such as molybdenum or tungsten.The HF2 Weld Control is shipped with ten pre-programmed weld functions that are saved in WeldSchedules 001 through 010. While these factory pre-programmed weld functions do not containsufficient weld time or weld energy for most welding applications, they are a useful starting point tobegin welding. Please note that WELD/REPEAT will only work with Air Actuated Weld Heads. Thetable below lists each Weld Function and its general application.Weld Function Pre-ProgSchedule Typical ApplicationBASIC WELD 001 Make single spot welds on simple flat parts without plating.WELD/REPEAT 002 Make multiple semi-automatic spot welds using an operator.QUENCH/TEMPER 003 Spot weld flat or round parts that have minimum plating thickness.PRE/POSTHEAT 004 Forge weld heavily oxidized or refractory parts such as molybdenum or tungsten.UP/DOWNSLOPE 005 Weld round parts, parts that are not flat, spring steel parts, or heavily plated oroxidized parts such as aluminum.BRAZE 006 Reflow two parts together using a braze material.ROLLSPOT 007 Make automated multiple weld spots using automatic feeders and PLC or hostcomputer.SEAM 008 Make automated hermetic seam welds using automatic feeders, and PLC or hostcomputer control.Make manual or semi-automatic non-hermetic seam welds using an operator.DUAL PULSE 009 Use for best control of miniature and small parts spot welding with or withoutplating.PULSATION 010 Use only for spot welding simple parts where the total weld energy or weld timerequired to make an acceptable weld using any other Weld Function is marginal.Using the Pulsation Weld Function can damage the crystal structure of the parts. |
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