Precise Alignment in Every Cycle:
SVS Standards for Welding Pins
Tight tolerances and high dimensional accuracy ensure reliable centering and positioning, even under high-speed conditions. The materials used are wear-resistant and maintain shape even under high mechanical stress.
Low-roughness guide surfaces allow the pin to slide smoothly into the bore without play. This prevents jamming and protects both pin and bore from premature wear. Additional hardening further extends service life.
Available as standard or custom-made versions based on drawings or samples. Geometry and material are matched exactly to your requirements.
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Material Selection
Silicon nitride combines exceptional hardness with thermal and mechanical stability. The non-conductive, lightweight ceramic resists wear and chemical stress even under high loads. This makes it suitable for welding applications with elevated temperatures and cycle rates.
Zirconia offers high strength, excellent fracture toughness, and strong wear resistance. It is highly resistant to chemicals and corrosion but offers only limited thermal conductivity. It performs reliably in positioning applications under steady thermal conditions, but is not suitable for welding processes involving dynamic or fluctuating temperatures.
This hybrid combines the strength of stainless steel (1.4301) with a wear- and corrosion-resistant ceramic layer. The coating significantly reduces friction and wear, while providing electrical and thermal insulation. It is applied by thermal spraying. Coating thickness ranges from 150 to 500 µm.
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We ensure the quality of your welding processes.
We process highly conductive copper components with a defined and verified purity level. All current-carrying surfaces are precisely machined and optimized for minimal contact resistance.
All components are manufactured in Germany and precisely matched to your application. Standard designs are available from stock, ensuring short delivery times and maximum flexibility.
Tight tolerances, stable production equipment, and consistent clamping conditions ensure reliable dimensional accuracy and repeatable results across all production runs.
Our products are subject to strict quality inspections. For special requirements, individual tests are carried out according to defined specifications.
Flexibility is our strength. Our products are available in numerous variants and can be manufactured with high precision to fit your system requirements.
For decades, we have contributed our expertise to SVS products and, as an active member of the German Welding Society (DVS), have helped shape technical standards.
SVS Capabilities
For over 60 years, we have been a reliable partner for manufacturers worldwide in welding technology.
Fundamentals
Function of Centering and Positioning Pins in Projection Welding
In projection welding, two components are joined at defined points through preformed weld projections. The welding current flows specifically through these projections, generating resistance heat at the contact points and locally melting the material. For the current path to function correctly, the projections must be precisely aligned. Positioning pins and centering pins serve different purposes in this context.
Positioning pins align the components in the plane. They fix the position in the X and Y directions and ensure that the projections of both components meet accurately. Any deviation in this plane prevents the current from passing completely through the intended joint area.
Centering pins define the depth position along the axis of the welding gun. They maintain a consistent gap between the components and ensure uniform electrode force. This is essential to create a defined electrical resistance at the projection contacts, which concentrates the current and causes the material to melt precisely at the intended locations.
Key Parameters of Welding Pins
To ensure precise, play-free alignment, centering pins must match the bore geometry exactly. Tight tolerances secure repeatability in high-volume production and prevent positional deviations.
Repeated mechanical loads demand robust materials. Hardened, wear-resistant pins offer extended durability, even under continuous use in automated lines.
Smooth guide surfaces improve handling and reduce friction. They support safe insertion, minimize wear at contact points and protect both the pin and the bore from premature damage.
Where multiple weld spots are used, accurate alignment of each projection is critical to current flow. Bore size, pin geometry and part positioning must be precisely matched to ensure consistent weld quality.
