Percussion welding is a type of resistance welding that joins dissimilar metals together using a short, quick electrical discharge to create a high-temperature arc between the metals. Pressure is immediately applied after the discharge to forge the materials together. It produces a shallow heat affected zone and has a very short time cycle of less than 16 milliseconds. Percussion welding can join metals that have small cross-sectional areas or when flash is not required at the joint.

1. Percussion Welding

2. Introduction-Percussion Welding
• Percussion welding (PEW) is a type of
resistance welding that blends dissimilar metals
together.
• Creates a high temperature arc that is formed
from a short quick electrical discharge.
• Immediately following the electrical discharge,
pressure is applied which forges the materials
together.
• This type of joining brings the materials together
in a percussive manner.

3. • Percussion welding is similar to flash
welding and upset welding but is generally
considered to be more complex.
• It is considered to be more complex because it
uses an electric discharge at the joint,
followed by pressure being applied to join the
materials together.

4. • Percussion welding is used to join dissimilar
metals together, or used when flash is not
required at the joint.
• Percussion welding is used on materials that
have small cross sectional areas.

5. Advantages
• Advantages of using percussion welding types
include
a shallow heat affected zone,
and the time cycle involved is very short.
• Typical times can be found to be less than
16 milliseconds.

6. http://apac.totalmateria.com/
• Percussion welding (PEW) is a resistance
welding process which produces coalescence
of the abutting members using heat from an
arc produced by a rapid discharge of electrical
energy.

7. • Pressure is applied progressively during or
immediately following the electrical discharge.
• This process is quite similar to flash welding
and upset welding, but is limited to parts of
the same geometry and cross section.

8. • It is more complex than the other two
processes in that heat is obtained from an arc
produced at the abutting surfaces by the very
rapid discharge of stored electrical energy
across a rapidly decreasing air gap.

9. • This is immediately followed by application of
pressure to provide an impact bringing the
two parts together in a progressive percussive
manner.
• The advantage of the process is that there is
an extremely shallow depth of heating and
time cycle is very short.
• It is used only for parts with fairly small cross-
sectional areas.