Does Welding Equipment need or require Calibration

B

Bob the QE

#1
I am full of welding questions today.....do the meters for feed speed, voltage and current levels of a GMAW, FCAW or GTAW welding equipment require periodic calibration?:confused:
 
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Stijloor

Staff member
Super Moderator
#2
Re: Does welding equipment need calibration

I am not a welding specialist, but this question related to other processes keeps coming up. This is what I ask: "How important is it for the welding process and its products that the meters provide the correct information/readings? If yes, what do you have in place to ensure that they do?

Stijloor.
 
#3
Re: Does welding equipment need calibration

I am full of welding questions today.....do the meters for feed speed, voltage and current levels of a GMAW, FCAW or GTAW welding equipment require periodic calibration?:confused:
In my experience, highly skilled, coded, welders get a 'feel' for the settings on the equipment, to suit the weld type, materials, preparation etc. Therefore, the dials, gauges etc are really only indicators of the actual settings - to get them in the right 'ball park' as it were. After that it becomes a case of experience to get the weld flowing right etc. to produce a good weld.

With less skilled welders, the value dialed in would be more important to good welds. In that case, a verification against a calibrated meter should suffice. So, lets say a rotary switch allows a range of currents to be dialed in, 0-150A in 10 amp increments, then over the range the equipment is normally used, those steps in current could be checked against the meter...
 

Marc

Hunkered Down for the Duration with a Mask on...
Staff member
Admin
#4
I am full of welding questions today.....do the meters for feed speed, voltage and current levels of a GMAW, FCAW or GTAW welding equipment require periodic calibration?:confused:
Are we talking automatic welding machines or humans?
 

hogheavenfarm

Quite Involved in Discussions
#5
We do in house calibration of the meters, it seems to satisfy the auditors. (verify the reading on the output against a calibrated voltmeter) - but everyone is right, the meters are only for initial setting, every welder tweaks them. But it needs to be done because those readings are referenced in the WPS approved by the customers.
 
S

Sorin

#6
I am full of welding questions today.....do the meters for feed speed, voltage and current levels of a GMAW, FCAW or GTAW welding equipment require periodic calibration?:confused:
As I have no idea what requirements are you working against, I'll just quote ISO reqs:

7.6 Control of monitoring and measuring equipment

The organization shall determine the monitoring and measurement to be undertaken and the monitoring and measuring equipment needed to provide evidence of conformity of product to determined requirements.

NB: emphasis mine

How do you demonstrate that the (required) set parameters (of the equipment) are the real ones?
I mean in order to demonstrate that the product is conforming to the (specified) requirements?
 
F

FilipeF

#7
As I have no idea what requirements are you working against, I'll just quote ISO reqs:

7.6 Control of monitoring and measuring equipment

The organization shall determine the monitoring and measurement to be undertaken and the monitoring and measuring equipment needed to provide evidence of conformity of product to determined requirements.

NB: emphasis mine

How do you demonstrate that the (required) set parameters (of the equipment) are the real ones?
I mean in order to demonstrate that the product is conforming to the (specified) requirements?
Generally in a welding process you demonstrate conformity by X-Rays, Penetrating Liquids, etc...
 
B

Bob the QE

#8
The requirements in 7.6 are related to product acceptance, this may be one area that it touches but it also may be covered under 7.5.1 and 7.5.2 as I want to know more about the process control aspect of these types of gages but as always the info or feedback is truly appreciated.

Thanks
 

Hershal

Metrologist-Auditor
Staff member
Super Moderator
#10
Calibration of welders MAY be required, depending on the industry served. For example, some of the steel programs in some jurisdictions may well require it, along with testing of the personnel to assure the quality is as consistent as possible.
 
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