General Description; The Cd Welding Process - Pro-Weld CD-212 Operation & Maintenance Manual

PRO
5. Don't operate with worn or poorly con-
nected cables. Don't operate weld gun with
loose cable connections. Inspect all cables fre-
quently for insulation failures, exposed wires,
loose connections, and repair as needed.
6. Don't overload welding cables or continue
to operate with hot cables.
7. Don't weld near flammable materials or liq-
uids, in or near atmospheres, or on ducts carry-
ing explosive gases.
8. Don't weld on containers which have held
combustible or flammable materials, or on ma-
terials which give off flammable or toxic va-
pors when heated, without proper cleaning,
purging, or inerting.
9. Be sure to provide for proper ventilation
when welding in confined spaces.
10. Never look at the electric arc without wear-
ing protective eye shields.
11. Always use the proper protective clothing,
gloves, ect.
12. Never strike an arc when near a bystander
who is unaware of the dangers of ultraviolet
light on their eyes.

5.0 GENERAL DESCRIPTION

CD-212 HEAVY DUTY PORTABLE
CD STUD/PIN WELDER
The CD-212 portable CD welder is a self con-
tained heavy duty capacitor discharge power supply
capable of welding up to 1/4" flanged studs in mild
steel.
The CD-212 utilizes a solid state control board
for longer life and has been designed for easy main-
tenance and field service. This welder uses standard
110 volt AC line voltage.
Page 2
WEL D
The system comes complete with power cord, weld
cables and gun. Just add the accessories required for
the stud size to be welded. This manual should pro-
vide all the information required for you to be able to
set up, weld, and maintain the CD-212 welding sys-
tem.

6.0 THE CD WELDING PROCESS

Contact welding is the simplest and most
common method of CD stud welding. Practically
foolproof, it produces no reverse side marking in
most cases and is suitable for most commercial and
industrial applications.
First, the gun must be set-up with the proper
accessories for the length and diameter stud you are
going to weld. Refer to the CD Accessories Guide
and CD Stud Welding Gun Section for information
on accessories and gun set-up.
1
Initial Contact
3
Forced Into Molten Pool
(FIGURE 1 CONTACT CD WELD)
The stud is first placed in contact with the
base material (SEE FIGURE 1). Verify that the gun is
held perpendicular to the work. Pulling the trigger
discharges the capacitors through the stud which va-
porizes the tip. The proper tip design is critical. This
is what determines the length of time of the weld. An
arc is briefly sustained which melts the stud base sur-
face and the work surface directly underneath the
stud. The spring pressure in the gun then forces the
stud into the molten pool, completing the weld in ap-
proximately six milliseconds.
CD -2 1 2
2
During Weld
4
After Weld