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7/29/2019 Shortening an in-Line Bracelet Using Pulse-Arc Welding Techniques
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May 2003
Professional Bench/Welding Technologies
Shortening an In-Line Bracelet Using Pulse-ArcWelding Techniques
Knowing how to tack-, fusion- and pulse-arc-weld at the bench saves time,
increases quality and boosts profits for your shop and service department
This in-line bracelet needs to be shortened by two links. The bracelet is held
together by a single link-wire wrapped around an open portion of the adjacent
link and permanently joined, giving the bracelet maximum flexibility. Following
is a procedure for shortening, reassembling and permanent welding of the
link.
1. This in-line bracelet
has alternating 14k
yellow and white gold
domed links. A 5mm
lab-created moissanite is
flush set in each of the
white gold links.
2. Saw to remove two links.
The best location for sawing is
adjacent to the domed link (A).
Open the links and remove the
two unwanted links to shorten.
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3. Reassemble the links and
tighten (B) for pulse-arc
welding. There’s a very small
gap at the top of the joint, and
it’s flush and in full contact at
the bottom.
4. Position the welding pencil
over the open link and depress
the foot pedal. A single pulse of
energy welds the link at the
bottom of the joint where it was
in full contact.
5. To complete the weld joint,
use 28-gauge 14k white gold
wire and build up the joint (C).
The ABI Tack III Pulse-Arc
welder is set on the high energy
setting at 45 volts for steps 4
and 5.
6. Four additional pulses of
energy were required with the
28-gauge wire to sufficiently
build the joint (D). (See “Know
Your Equipment” at right.”)
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7. The surface discoloration
from the pulse-arc welding
process is easily removed by
wire brushing. File or sand the
excess metal at the joint andpolish.
8. The shortening process took
12 minutes from start to finish.
Important: All tack- and pulse-arc equipment settings will differ and are based
on the volume and alloy of the material you’re working with. Using likematerials will give you a parameter for the settings required for your
application. Keep a record of settings and tasks for future reference.
If you have questions about this process, contact Mark B. Mann at
[email protected]. This installment is sponsored by ABI, Cranston, RI.
For information related to ABI, call Janet Kirk at (888) 494-2663.
Know Your Equipment
The weld pencil contains an electrode (4). The electrode is inserted
through the base metal housing that’s inserted in the threaded
weld-pencil tip (2). A ceramic tube (3) is also inserted into the tip and
secured by tightening the allen screw with the ABI-provided key-wrench
(1).
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Over time, the electrode’s tip becomes misshapen from use. It’s best to
keep it rounded at the end by sanding. While shaping the electrode,
clean and shape the ceramic tip. For this procedure, the tip of the
electrode is recessed 1mm inside the ceramic tube.
For this pulse-arc welding procedure, the weld pencil with a #2
electrode and ceramic tip is used (1), attached to the positive lead. The
contact pad is attached to the negative lead. For easiest viewing of the
work-in-progress, the contact pad rests on a lowered flat bench pin.
– by Mark B. Mann
Photos by Mark B. Mann
©2003 Visual Communications
Copyright © 2003 by Bond Communications
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