power is turned on, this machine delivers very rapid blows and thusperforms the required work. Riveting in the field on the assembledstructure is usually done by means of the pneumatic hammer. Hand Riveting. Hand riveting is now used only on small jobs,the air gun being replaced by the sledge… … Fig. 60. Heavy, Motor Driven Multiple PunchCourtesy of Mackintosh, Hemphill & Company Punching and Reaming. Rivet holes in structural steel workare ordinarily punched in the metal by means of a powerful punchingmachine, Figs. 59 and 60 showing examples of the single and multi-ple types,…
Building, Iron and steel · Steel, Structural · Theses
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