1. Shop
  2. Production Systems and Testing Equipment for Bimetal-Snap-Action-Discs

Automatic Contact Welding System [WA2]

Automatic system for welding 1 or 2 contacts on bimetal-snap-action-discs.

• Automatic unwinding and upwinding of the pre-punched bimetal strip
• Camwheel controlled belt feed
• Automatic contact separation and pick & place units
• Longlife special welding head
• Medium frequency electric welding generator
• Adjustable welding current
• Function monitoring: feed, contact separation, pick & place, welding process, ..
• Capacity: up to 3,200 pieces / hour


Standard version
  • Protective cover with monitoring and automatic locking
  • Automatic unwinding- and upwinding unit for the punching strip with pre-punched discs
  • Vibrator for separating the contacts to be welded on
  • Pick & Place units for placing the contacts on the bimetal disc
  • Real time monitoring of the welding parameters and the welding process
  • Connection to QA systems
Options & Accessories
  • Adaptions for customer specific disc shape
  • Adaptions for customer specific contact elements
CapacityUp to 3,200* pieces / hour
(= 0.88 pieces / second .. or 1.13 seconds / piece)
*Specifications without taking setup times into account.
Process input
  • Bimetal strip, pre-punched discs and pressed in again
  • Bandwidth: max. 40mm
  • Tape thickness: 0.15 to 0.3mm
  • Tape wound on coil with paper liner and adhesive tape applied
  • contact elements (as bulk material in the vibrating pot)
Process flow and details
  • 1-2 contacts per bimetal disc can be welded on
  • welding current max. 2500 A.
  • Welding time: min. 15ms
  • Feed: cam disc 0 to 35mm
Process output
  • Bimetal strip, pre-punched discs, pressed into the strip with 1-2 contacts attached
  • Tape wound on coil with paper liner and adhesive tape applied
  • Mains voltage: 3x400V + N + PE, 50 / 60Hz AC
  • Electrical power: approx.1.0 kW (peak approx.8kW)
  • Compressed air: 6-10 bar. 300 liters / minute. Free from oil, water and dust.
  • Different mains voltages and frequencies on request.
Environmental conditions
  • Industry standard. Indoor.
  • Temperature: + 18°C to + 30°C
  • Relative humidity: < 70% non-condensing
Dimensions and weight
  • Automatic system (Width x High x Depth): approx. 2,600 x 2,100 x 900mm
  • Space requirements (Width x High x Depth): approx. 2,700 x 2,100 x 2,100mm
  • Weight: about 450kg