CALIBRATION OF WELDING MACHINES

[mike ball]

Please I require assistance on calibration of welding machines.

[Dindo]

You can use a tong tester that is calibrated to a standard.

 

Check the current and amperage during welding and see if it corresponds to the gages built in on the machine, if not you can do adjustments on the gages of the welding machines to corresponds to your actual reading

 

 

On Fri, Jun 17, 2011 at 7:35 AM, mike ball <oiq...@yahoo.com> wrote:

Please I require assistance on calibration of welding machines.

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[sajan james]

You can use BS7570:2000. Code of practice for the validation of arc welding equipment. ... Validation of arc welding equipment.

 

 

Reagrds,

 

On Fri, Jun 17, 2011 at 4:35 PM, mike ball <oiq...@yahoo.com> wrote:

Please I require assistance on calibration of welding machines.

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[Nimesh Chinoy]

To calibrate the welding machine you will need 

1. Master Calibrated Current Meter (DC)

2. Master Calibrated Voltmeter (DC) 

Depending on your equipment CC / CV you need to calibrate the parameters of Current and Voltage. 

Also if your equipment has DIGITAL VOLTMETER or DIGITAL CURRENT meter the calibration is valid for the period of 1 year, and for ANALOG with period varies between 3 to 6 months. 

Regards,

Nimesh S Chinoy

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Nimesh S Chinoy

[javed iqbal]

Dear all,

Nedd answer of followin detail.

Thanks

Javed

 

   Carbon equivalent values are useful to determine:

 

(a)    Weldability aspects

(b)   Crack sensitivity aspects

(c)    Typical mechanical properties

(d)   All of the above

 

[Nandesh Kumar]

(d) --- On Sun, 19/6/11, javed iqbal <jvd...@yahoo.com> wrote:

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[murugesan jeyaraman]

Answer is a) Weldability aspects

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[santo...@gmail.com]

The answer is (d) all of the above

Regards
Santosh

Sent on my BlackBerry® from Vodafone

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From: javed iqbal <jvd...@yahoo.com>

Sender: material...@googlegroups.com

Date: Sun, 19 Jun 2011 01:41:49 -0700 (PDT)

To: material...@googlegroups.com<material...@googlegroups.com>

ReplyTo: material...@googlegroups.com

Subject: [MW:11379] Correct Answer need

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[Vairamuthu Ramar]

answer is (d)

Vairamuthu R.
 
muscat

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Date: Sun, 19 Jun 2011 23:56:51 +0800
Subject: Re: [MW:11386] Correct Answer need
From: jmuru...@gmail.com
To: material...@googlegroups.com

[Karthik]

Hi, Answer is - (b)...Justification is given below. CARBON EQUIVALENCY Carbon equivalency (C.E.) is used to give an overall carbon percentage to estimate the risk of cracking. The higher the carbon content; the harder the steel - the more susceptible it is to cracking. A carbon equivalency of 0.04% and above gives a greater risk of cracking. Thanks & Regards, (Karthik) Karthikeyan.S QA/QC Manager Getabec Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282 --- On Sun, 6/19/11, Nandesh Kumar <nandes...@rocketmail.com> wrote:

[arvinda shan]

Answer--- d---All of the above

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[Prakas...@akersolutions.com]

Hi All,

 

Ans is A.

Please see the below explanation.

 

 

Because the equivalent carbon content concept is used on ferrous materials, typically steel and cast iron, to determine various properties of the alloy when more than just carbon is used as an alloyant, which is typical. The idea is to convert the percentage of alloying elements other than carbon to the equivalent carbon percentage, because the iron-carbon phases are better understood than other iron-alloy phases. Most commonly this concept is used in welding, but it is also used when heat treating and casting cast iron.

 

In welding, equivalent carbon content (CE) is used to understand how the different alloying elements affect hardness of the steel being welded. This is then directly related to cold cracking, which is the most common weld defect for steel, thus it is most commonly used to determine weldability.

 

Regards,
Prakash Verma
Aker Drilling Risers
Aker Solutions
MOBILE - 0047-40466591
DESK- 0047-22945932
Email: Prakas...@akersolutions.com

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[saifulla cmp]

Dear All,

 

Correct Answer is

 

(a)    Weldability aspects

 

From API 577

10.9.1 Metallurgy and Weldability

One tool has been developed to help evaluate the weldability

of carbon and alloy steel and that is the carbon equivalent

(CE) equation. The CE calculates a theoretical carbon content

of the metal and takes into account not only carbon, but also

the effect of purposely added alloying elements and tramp

elements. Several different equations for expressing carbon

equivalent are in use. One common equation is:

 

CE= C+Mn/6 + ( Cr+Mo+V)/5 +( Si+Ni+Cu) /15

 

Regards,

SAIFULLA

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[Sojin K soman]

U can do it with tong tester. Hold the tong tester in the cable which is connected to you holder. Set 80A, 100A, 120A,140A etc like that three or more u measure in tong tester upto 10A variation ok.Do it witth 2.5mm rod, 3.15mm rod and 4mm rod. Refer the code BS7570:2000 if u need. Tong tester should to be calibrated. Make tong tester zero after every evaluation

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From: sajan james <sjnj...@gmail.com>
To: material...@googlegroups.com
Sent: Saturday, June 18, 2011 1:38 AM
Subject: Re: [MW:11353] CALIBRATION OF WELDING MACHINES