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Huys offers a very wide range of products and services. But, how do you know which one is right for you? Simply contact us and a Huys welding engineer will be happy to discuss your needs and recommend a cost-effective and practical solution. |
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Choosing the Correct Electrode Geometry
Choose the correct electrode geometry to suit your needs. In order to maximize electrode life, you need to maintain the correct diameter of the weldface for as long as possible and thereafter a consistent and predictable rate of wear. A number of different cap geometries are available that are used for different purposes and that have different wear characteristics.
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Advanced High-strength Steels (AHSS)
Advanced high-strength steels (AHSS) include dual phase (DP), transformation induced plasticity (TRIP), martensitic and boron-alloyed steels, and are also known as ultra high strength steels (UHS). When resistance welded, the relatively high levels of carbon equivalents and their high inherent cooling rates can cause high hardness, weld brittleness, low cross tension strength, and difficulty in pulling a weld button (partial or complete interfacial fractures).
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Current Stepping
Current stepping (gradually increasing current over the life of the electrode) in resistance welding compensates for electrode wear ("mushrooming") by maintaining a consistent current density (Amp/mm2) and hence acceptable weld size. The ideal (longest) electrode life will be obtained with a low current stepper slope (small current increases) and a predictable current step frequency (rate) while maintaining a minimum sized weld nugget without expulsion.
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Weldability
Weldability is the ease by which a stack-up of worksheets or parts can be welded. Determining the weldability lobe of a stack-up can help to increase efficiency, production speed, quality and reduce maintenance costs. Knowing the upper and lower limits for both weld current and weld time will yield a weld schedule that is the most robust for the system and allows engineers to be welding at the maximum capability of the equipment and the worksheets. |
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