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Re: [MW:23759] RE: 10970] heat input calculation

By Materials & Welding
Hi,

What i should consider, that heat input is v*I*n*60/TS, TS is travel speed so it will give me Kj/mm but how i can convert it to temperature ....
Additionally now i can convert it into temperature than it will give me input heat but what about actual heat inut which may very metal by metal so how i can calculate that .

Thank you 

On Sunday, 8 May 2011 17:24:04 UTC-7, Kathalingam Babu wrote:
Hi
 
The arc efficiency as mentioned below is used for the actual heat input calculation.
 
The stds/Codes works on the theoretical HI , which is more than the actual HI, so no need to worry about the arc efficiency factor.
 
Infact the those values are only the approximate values , if you want actual arc efficiency values you have to go for an calorimeter set up to find out the actual one
 
Thanks & Regards,
 
K. Babu
----- Original Message -----
From: Pieper QSI
Sent: Friday, May 06, 2011 6:07 PM
Subject: RE: [MW:10980] RE: 10970] heat input calculation

Correct me when I'm wrong but this efficiency factor is not mentioned in any original calculation formula and specifications such as ASME section IX and/or EN ISO 15609/15614 therefore in my opinion cannot taken into account for official calculation of Heat Input.

 

Met vriendelijke groeten / Best Regards

 

Herman Pieper

 

Pieper Quality Support & Inspection

Phone: +31 (0)521 380083

Fax:     +31 (0)84 7539225

Cell:     +31 (0)6 51691215

www.pieper-qsi.nl

 

Van: material...@googlegroups.com [mailto:material...@googlegroups.com] Namens Fitria Rahman
Verzonden: vrijdag 6 mei 2011 10:48
Aan: material...@googlegroups.com
Onderwerp: Re: [MW:10979] RE: 10970] heat input calculation

 

Dear All

i notice that there is an important piece of formula is missing. the heat input formula given by Firman shall be multiplied by efficiency which is depending on its welding process. GMAW & SAW having efficiency 0.9, GTAW=0.8, SMAW=0,75

rgds

2011/5/6 muthusrinivasan muthuselvam <msm...@gmail.com>

conversion factor to convert the travel time to mm/sec

 

On Fri, May 6, 2011 at 1:46 PM, Martin Prad <marti...@hotmail.com> wrote:

what is 60 (V*I*60) in this formula?
 

From: vinod....@blissanand.com
To: material...@googlegroups.com
Subject: [MW:10974] RE: 10970] heat input calculation
Date: Fri, 6 May 2011 13:00:05 +0530

You can calculate by using following formula:-

 

Heat Input = (V*I*60)/(Travel Speed in mm) this will come in J for KJ please further devide it with 1000.

 

For the below value the Heat Input shall be

0.50 KJ.

 

With kind regards,

Vinod Kumar Kataria

GM - Operations

Bliss Anand Private Limited,

92B/93B Sector 5

IMT Manesar,Gurgaon,

National Capital Region Delhi.

India .

Phone : +91-124-4366000 (9 Lines)

Mobile Phone : +91-9560199004

Fax : +91-124-2290884

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Martin Prad
Sent: Friday, May 06, 2011 11:00 AM
To: material...@googlegroups.com
Subject: [MW:10970] heat input calculation

 

gents,
 
how to calculate the heat input in KJ/mm if i have got the folowing parameters?
 
Amperage=71
Voltage=9.5
Travel speed=3.2 inch/minute
can you please put these in the formula?
 
thanks.

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