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

356 Introduction to Basic Manufacturing Processes and Workshop Technology
8. Groover. Fig. 18.9 shows a typical groover and its operation, which consists of two
folded edges called locks. The two edges are hooked together and locked with a grooving
tool called hand groover. These tools come with grooves of various width and vary in
size. The groover is used for offsetting an outside grooved seam. Initially, the folding
edges to 180° are made first. Then the folded edges are hooked together. Finally
grooving tool is then used to make strong joint of metal sheets as shown in figure.
Grooving
tool
(i) Edges folded to 180 o
(ii)
Fig. 18.9 A typical hand groover and its operation
9. Hand seamer. Fig. 18.10 shows a hand seamer, which is used for bending narrow
portions, which are difficult to fold, by other means. It has two adjustable screws,
which can be regulated for width of bend. The metal sheet is placed between the
jaws and the jaws are clamped together by squeezing the handles to grip the sheet
for further bending.
(iii)
Fig. 18.10 Hand seamer
Other hand tools or instruments used in sheet metal shop include rivet sets, soldering
iron, scrapers clamps, screw drivers, spanners and wrenches, chisels, different types
of calipers and dividers, vernier caliper, micrometers, standard wire and thickness
gauges, files for softer metals, conventional types of metal files including needle
files and round files.