686408

Kemppi A7 TIG Orbital System 150 Manual

16
Zoom out
Zoom in
Previous page
1/48
Next page
16
A7 TIG Orbital System 150© Kemppi Oy 2016 1615
OPERATING MANUAL
3.5.2 Shielding and backing gas
Select proper shield gas/gas mix for optimum results.
100% argon is normally used for TIG welding. In certain
cases, you can benet from using a mixed gas, such as 95%
argon, 5% hydrogen. This mixed gas gives better control of
the weld puddle and lower heat input. Adding hydrogen
or helium increases the arc voltage and creates a "stier",
more focused arc column.
Industrial grade inert gas is sucient for most stainless
steel welds. Use a higher purity grade for high quality
welds on easily oxidizable alloys.
The purpose of purging is to replace unwanted air and
other vapor contaminants from the root pass by a gas
that prevents oxidation during welding. Oxidation can
produce a variety of problems, such as root oxidation
(sugar), incomplete fusion, porosity and changes in weld
chemistry, which can aect weld mechanical and corrosion
resistance properties adversely.
Use purging when welding stainless steel, nickel alloys,
and most nonferrous base metals. Argon is commonly
used.
The “chamber” created around the tube joint by the
installation of the weld head is ooded with inert gas
that both protects the weld puddle from oxidation and
the tungsten electrode. The gas hose material used
in the weld heads is specically designed to prevent
atmospheric moisture from contaminating the shielding
gas by permeation.
The gas regulator/ow meter should be set for 4
bar (60 PSI) and a suitable ow rate. Recommended gas
ow rate is 3 to 5 l/min for backing gas and 5-10 l/min
for shielding gas. Set pre-purge time so that backing gas
volume is about 10 times the volume to be put inside the
tube.
You can apply separate backing gas for root
protection. When using backing gas, also use dual ow-
meter regulator that allows having two independently
regulated (shielding and backing gas) circuits from one gas
bottle.
3.6 Instructions for welding
Use the following 5-step procedure to start welding:
1. Select and install suitable collets.
2. Mount weld head around the tube.
3. Pre-purge the tube ID with shielding gas.
4. Select the program you want to use.
5. Start welding by pressing the Start button.
… 16 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Kemppi A7 TIG Orbital System 150 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Kemppi A7 TIG Orbital System 150 in the language / languages: English as an attachment in your email.

The manual is 3,16 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info