J - Aluminium Articles

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Joining: Riveting

With the further development of other joining processes and the increasing use of adhesive bonding for stressed joints, riveting was regarded of play for the cold-formed aluminium rivet. Nowadays, riveting processes for aluminium alloys are divided into joining using rivet elements (so-called direct riveting) and joining unsing functional elements

Joining: Welding

Welding processes are used for the joining of metals (particularly steel and aluminium) and plastics. It is estimated, that for the joining of aluminium parts in 40 to 50 per cent of the cases welding processes are involved. The thing all welding processes have in common is that they produce a permanent substance-to-substance joint between the

Joining: Soldering and brazing

Soldering and brazing are methods for joining different metallic materials. One can solder or braze all metals. With few exceptions (see Prerequisites section), all aluminium alloys can be joined to other materials by soldering or brazing. The process takes place using a fill metal (solder) whose melting point is below that of the metals being

Joining: Riveting: Percing rivets

With punch riveting, the aluminium parts are joined using riveting elements from two sides. There is no need for the pre-drilled hole that is necessary with conventional riveting of the parts. In addition to a suitable rivet geometry, the material-specific composition of the rivet element is decisively important for a high-quality riveted joint;

Joining: Soldering and brazing: Prerequisites

In order that the surface can be wetted with molten solder, the oxide layer on aluminium has to be removed. As thermal decomposition is not feasible, owing to the high melting point of aluminium oxide around 2050°C, it needs to be removed chemically (fluxes, gases) or mechanically, by brushing, scraping or grinding. Before soldering, the area of

Joining: Riveting: Solid rivets

A one-piece joining element is used here; once the rivet has been inserted, the closing head is formed from the rivet shank by plastic deformation. Correspondingly, the components have to be accessible from both sides. With all-aluminium constructions, cold-formed aluminium rivets are used almost exclusively. Hot-formed steel rivets are only used