Introduction to Basic Manufacturing Processes and ... - always yours

Sheet Metal Work 351
(g) Bossing mallet
(h) Tinmen’s mallet
(i) Rawhide
mallet
(a)
(b)
(c)
(d)
(e)
(f)
(g)
Fig. 18.2 Types of hammers
Smoothing hammer. Smoothing hammer (Fig. 18.3(a)) is used for leveling and
smoothing a sheet metal joint.
Stretching hammer. Stretching hammer (Fig. 18.3(b)) is used for stretching sheet.
Creasing hammer. Creasing hammer (Fig. 18.3(c)) is used to close down joint
edges of sheets metal part.
Hollowing hammer. Hollowing hammer (Fig. 18.3(d)) is used for hollowing sheet
metal part. It is used for generating sharp radii also.
Riveting hammer. Riveting hammer (Fig. 18.3(e)) is used for forming riveted heads.
Planishing hammer. Planishing hammer (Fig.18.3(f)) is used for removing small
marks or indentations from the sheet metal job surface and to true the shape of the
work. It smoothens off the finished sheet metal work.
Soft hammer or Mallets. Mallets (Fig. 18.3(g)) used during working with soft metal
sheets. They may be of wood, rubber or raw hide. A mallet strikes a blow with the
minimum damage to the surface. In sheet metal work, the commonly used mallets are
bossing mallet, tinman’s mallet (Fig. 18.3(h)) and rawhide mallet (Fig. 18.3(i)).
The uses of hammers for some sheet metal operations are depicted through Fig.
18.3.
Hollowing sheet metal
Using a creasing hammer
(a)
(b)