Page 103 - Module DMV20173

5. 0 JOINING PROCESSES

5.5.1 FILLER METALS

1. Filler metals used are normally called as solders which are essentially alloys of lead
and tin (62% tin + 38% lead).

2. Filler starts to melt at 183°C depending on the composition.

Figure 5.12 Filler metals.

5.6 ADHESIVE BONDING

Figure 5.13 Example of adhesive bonding.

1. Adhesive bonding is a joining process where a substance, in a liquid or semi liquid, is
applied to adjoining workpiece to provide a permanent bond.

2. Sticking, or adhesive bonding, of metals is becoming very popular in the automotive,
aircraft, and packaging industries because of the advantages that this technique can
offer.
3. The recent development in the chemistry of polymers, adhesives now cheap, can be

applied easily and quickly, and can produce reasonably strong joints.
4. Adhesive bonding can also be employed in producing joints of dissimilar metals or
combinations of metals and non-metals like ceramics or polymers.
5. This certainly provides greater flexibility when designing products and eliminates the

need for complicated, expensive joining processes.

BPLK 135 DMV 20173