Fig. 5_a_ is an elevation, Fig. 5_b_ a plan, and Fig. 5_c_ a
longitudinal vertical section of the tool for performing the fifth
operation, the work being shown in section in the latter figure. It
consists of a bed-die, _l_, with groove, _m_, to receive the lower
web, but terminating at a distance from the die apertures, so as to
leave supports, _n_, for the parts, _e*_, of the rod to resist the
downward pressure of the punches, E, which remove the portions, _e_,
from each side of the cross stay, as shown in Figs. 5_b_ and 5_c_. The
correct position of the work in regard to the punches is insured by
these supporting parts, _n_, which terminate the grooves, _m_.
Fig. 6_a_ is an elevation of the winch for performing the sixth
operation.
Fig. 7_a_ is an elevation and Fig. 7_b_ a plan of the tool for
performing the seventh operation. P P are the punches for trimming the
outside and Q Q those for trimming the inside of the ends of the
links. The links adjacent to the one to be operated on are brought
together into the position shown in dotted lines, the bed-die having
an aperture in it to admit of this, so that both ends of the link to
be trimmed may be operated on together.
Pages:
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108