Welding & Riveted Sub-Assemblies

Welding and riveting join two or more metal parts into a single, permanent sub-assembly. In electrical products this is how contacts, terminals and current-carrying parts are attached to carriers, springs and brackets. Voltkon (UVA Group) builds resistance-welded, projection-welded and riveted sub-assemblies for switchgear and electrical OEMs.

Because we stamp our own parts, wind our own coils and mould our own plastics in-house, we can supply complete welded and riveted sub-assemblies rather than loose components — reducing your supply chain, tooling and assembly cost while improving quality control.

Why Choose UVA?

  • Resistance & Projection Welding: Spot, projection and seam welding of contacts and current-carrying parts
  • Riveting & Fastening: Solid, tubular and self-pierce riveting for reliable mechanical joints
  • Vertically Integrated: In-house stamping, coils and moulding for complete sub-assemblies
  • ISO 9001 / 14001 / 45001 Certified: Consistent quality, environmental and safety management across our units
  • High-Volume Production: Scalable welding and assembly capacity tailored to client demand

With dedicated plants across India, UVA Group is a trusted partner for global OEMs seeking reliable, cost-effective and high-quality welded and riveted sub-assemblies.

Our welding and riveting processes join a range of materials, including:

  • Copper and copper alloys (contacts, busbars)
  • Silver and silver-alloy contact materials
  • Steel and stainless steel (carriers, brackets, springs)
  • Brass and bronze
  • Bimetal and clad strip
  • Aluminium and aluminium alloys
  • Plated and pre-finished strip

This lets us weld and rivet the right combination of materials for each application, from silver contacts on steel carriers to copper current-carrying assemblies.

Our facilities cover the full process chain, from joining through to finished, tested sub-assemblies. Our core capabilities include:

  • Spot Welding: Resistance spot welding of sheet and strip components
  • Projection Welding: Precise, repeatable joints on contacts, nuts and studs
  • Contact & Tip Welding: Welding of silver and silver-alloy contacts to carriers
  • Riveting: Solid, tubular and self-pierce riveting of contacts and carriers
  • Fastening & Insertion: Staking, clinching and press-fit assembly
  • Assembly Lines: Building multi-part sub-assemblies and finished products
  • In-Process Testing: Weld strength, continuity and functional checks

    UVA Group provides a range of in-house and partner secondary and finishing operations to deliver complete, ready-to-use welded and riveted sub-assemblies. These include:

    • Plating & surface treatment
      • Silver plating
      • Tin plating
      • Nickel plating
      • Copper plating
      • Zinc plating & passivation
      • Selective / spot plating
    • Cleaning & degreasing
    • Marking & traceability
    • Final assembly
    • Inspection & packing

    UVA Group serves a diverse range of industries with welded and riveted sub-assemblies tailored to each application. Typical products we produce include:

    • Switchgear: Contact assemblies, moving and fixed contacts, terminal assemblies, current-carrying links
    • MCB / Circuit Breakers: Bimetal-to-carrier welds, contact rivets, trip assemblies, arc runners
    • Relays & Contactors: Contact-to-spring welds, coil terminal assemblies, riveted armatures
    • Automotive Electricals: Terminal welds, connector assemblies, battery and earthing links
    • Industrial & Appliances: Riveted brackets, welded frames, contact and terminal sub-assemblies
    • Custom Sub-Assemblies: Bespoke welded and riveted assemblies to customer drawings and specifications

    We operate a versatile welding and assembly infrastructure built for high-volume production of precision welded and riveted sub-assemblies, supported by in-house tooling and a quality lab.

    • Resistance welding machines for spot and projection welding
    • Contact-welding and tip-welding equipment
    • Riveting and fastening presses
    • Dedicated assembly lines and fixtures
    • Quality lab with weld-strength and functional testing

    Looking for a custom part?