Cold welding for aluminum
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Special adhesive compositions are used primarily for the temporary connection of aluminum products, mainly pipes. They do not withstand significant operating loads, and are applied when there is no possibility of performing cold welding in production conditions. Two-component adhesives for cold welding include epoxy resins and steel powder added as filler.
Sequence of operations
- The epoxy component is kneaded to a pasty state (this should occur at a positive ambient temperature);
- When the resin becomes a high-viscosity paste, a certain amount of solvent is added to it, and the mixture is thoroughly mixed;
- The finished composition is immediately applied to the jointed joints of aluminum products, which are then tightly pressed against each other;
- After a while, the mixture polymerizes, which can be detected by changing its color. Then the pressure on the joint can be removed, and use the design of the pores for the purpose.
Supplier Evek GmbH offers to buy aluminum of domestic and foreign production at an affordable price in a wide range. We will ensure the delivery of products to any point of the continent. The price is optimal.
Cold plastic welding of aluminum parts
In this case, it is necessary to use special deforming equipment — presses, but the quality of the connection is not inferior to the initial metal in its mechanical characteristics, and in some cases exceeds it. Plastic cold welding can be performed only with respect to deformable aluminum and its alloys.
In the parts to be joined, technological holes are made, into which special rivets (hollow or solid) are introduced from the deformable aluminum alloy or pure aluminum. Then with the help of special devices rivets are upset. Metal fills under pressure gaps, forming a reliable fastening; The strength of the joint corresponds to the strength of the rivet on the shear:
Cold disembarkation / sedimentation
Such «welding» can be carried out both for flat surfaces and for joints. In the first case, protuberances are squeezed out from opposite sides by cone-shaped punches, which are then subjected to draft on hydraulic presses. The place of cold welding is kept under pressure for a few seconds to overcome the plastic inertia of the metal. At the butt-cold welding, the butt ends are placed in matrices with a protrusion of 2… 4 mm, after which they are tightly compressed under the hydraulic press slider. In this case, the joint is further strengthened due to plastic deformation of aluminum.
Buy. Supplier, price
Are you interested in cold aluminum welding with direct current? Supplier Evek GmbH offers to buy welded aluminum at the manufacturer’s price. We will ensure the delivery of products to any point of the continent. The price is optimal. We invite you to partner cooperation.