How can pressure create a weld?
The cold pressure welding technique employs a ‘multi upset’ principle, perfected by a British company, GEC. Each time the cold welder is activated, the material that is inserted in the die is gripped by the die and fed forward. As the two opposing faces are pushed against each other, they are both stretched and enlarged over their entire surface area. The oxide and other surface impurities are forced outward from the core of the material and a bond is created. A minimum of four ‘upsets’ is recommended to ensure all impurities are squeezed out of the interfaces.
