Some stakes are made of forged mild steel faced with cast steel. With the help of a hammer, operations such as bending, seaming or forming can be easily performed on these stakes. Their working faces of stakes are machined or ground to needed shape. The head or horn of stake is available in a number of varieties of sizes and shapes. The shank of stake is designed to fit into a tapered bench socket. It consists of a shank and a head or horn. It is a sort of anvil, which supports the sheet for sheet metal work. Stakes are used to form the metal sheets into various shapes. The uses of hammers for some sheet metal operations are depicted through Fig. In sheet metal work, the commonly used mallets are bossing mallet, tinman’s mallet (Fig.) and rawhide mallet (Fig.). A mallet strikes a blow with the minimum damage to the surface. Mallets (Fig.) used during working with soft metal sheets. It smoothens off the finished sheet metal work. Planishing hammer (Fig.) is used for removing small marks or indentations from the sheet metal job surface and to true the shape of the work. Riveting hammer (Fig.) is used for forming riveted heads. It is used for generating sharp radii also. Hollowing hammer (Fig.) is used for hollowing sheet metal part. (c) Creasing hammer.Ĭreasing hammer (Fig.) is used to close down joint edges of sheets metal part. Stretching hammer (Fig.) is used for stretching sheet. Smoothing hammer (Fig.) is used for leveling and smoothing a sheet metal joint. The uses of different kind of hammers are given as under: (a) Smoothing hammer. HAMMERSįig shows the various types of hammers used in sheet metal work for forming shapes.
It is used for cutting circular or irregular curved shapes ranging from 20 to 35 cm. It may be of right hand or left hand type, easily identifiable, as the top blade is either on the right of on the left. Its blades are designed for universal cutting straight line or internal and external cutting of contours. It is used for general purpose cutting, making straight cuts and trimming away extra metal. Different types of hand shears are: (1) Straight hand shear: They are required to size and shape the sheets. They resemble with pair of scissors and are used like them to cut thin soft metal sheets of 20 gauge or thinner. HAND SHEARS OR SNIPSįig shows the types of hand shears or snips. Some of the important sheet metal tools are described as under. (vi) Miscellaneous hand tools such as chisels, groovers, seamers, rivet sets and hand punches. The following tools are commonly used for sheet-metal work: