Micro Resistance Spot Welding is an extremely efficient joining technique ideally suited for high-volume manufacturing, adaptable for most metals and their alloys.
Micro Resistance Spot Welding uses the application of electric current and mechanical pressure to create a weld between two metallic parts. Copper electrodes conduct a current through the work pieces, generating enough local heat from the electrical resistance and the thermal conductivity of the metal to create a small molten pool. The metal then cools while under pressure, forming a weld nugget with adequate strength to hold the parts together. The process requires the application of external force, but no fluxes, filler metals, or external heat sources are necessary. Request a Quote
Spot welding is a non labor-intensive, easily automated resistance welding process ideal for rapid welding applications. In spot welding, overlapping metal sheets are clamped between two electrodes through which an electrical current is passed, generating heat at the sheet-sheet (faying) interface. The metal is rapidly melted at the faying surface; as the heat dissipates through the work piece, the spot weld cools and the metal solidifies. The electrodes continue to maintain pressure during weld nugget solidification to provide joint integrity.
Resistance Spot Welding Benefits
- Efficient energy use, with little pollution
- High production with very short cycle times
- Easily automated
- No required filler materials
- Multiple sheets and dissimilar metals can be simultaneously welded
- Limited work piece deformation
- High shear strength
Resistance Spot Welding Limitations
- Most metals and their alloys can be spot-welded, but the applications are limited to relatively thin materials
- Because the weld spots do not form a continuous seam, the tensile and fatigue strengths may be lower than with other welding methods
Vollrath, a full-service, ISO 9001:2000 certified company, has the manufacturing strength, technical knowledge, and experience to hold the leading edge in welding services. Our attention to process control eliminates common production problems and ensures the delivery of consistent quality for every welding application.
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For more information about our resistance welding capabilities or to request a quote for your specific application, please contact Vollrath. We’d enjoy hearing from you.
Deep Drawn Metal Stampings l Sheet Metal Stamping l Resistance Spot Welding l Robotic ARC Welding l Resistance Seam Welding l Aluminum TIG Welding Projects l Automotive Metal Stamping l Precision Sheet Metal Fabrication l Sheet Metal Engineering
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Micro Resistance Spot Welding by Vollrath
Drawn stainless steel shells are loaded onto the conveyor belt of an
annealer that is atmospherically controlled to prevent oxide scale and
discoloration on the parts during the annealing process.
Stainless steel parts are processed through an automated pickling/passivating
line to remove oxide scale and heat tint discoloration as well as to remove
surface contamination.
The pictured robotic welder is used for plasma arc welding parts that
require accurate weld locations, repeatability and long weld paths (or
for multiple parts with short weld paths). To help reduce part cost, this
unit is set up in a cell environment to permit additional operations during
welding.
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