how to use the parameters like weld current , weld time ,hold time and squeeze time in proper combinations to get a good weld?

-- rashmi v (radha@xmail.net), February 06, 2002

Answers

Sir, for specific answer more detail is required. In general, current and time, the more of either, the hotter your weld, (at a set force). Hold and squeeze are generally related to before and after the weld time has occured. Squeeze time is the period of time after the weld head has sent a fire signal to the power source, but before current starts to flow. This allows a the head to stop "ringing" and flatline at a specific force. A technical paper entitled "The Importance of Squeeze Time in Reistance Welding" is available. Hold time is after weld current stops, before the weld head retracts. This allows time for the metals to cool and solidify.

-- Kurt Tolliver (kurt@unitekequipment.com), February 09, 2002.

Dear Rashmi, The proper ( rather we can say OPTIMSED ) combination of setting/ using Weld Parameters is mainly w.r.to

1. any Given Application. ( Application such as SPOT, PROJECTION & SEAM Welding are the most popular forms of RESISTANCE WELDING TECHNOLOGY.

2. Material specification, sheet thicknesses, etc., of the Component to be welded.

3. INPUT Conditions to the m/c such as Power supply, Welding Pressure, etc., 4. Even Production rate also many times govern the total weld cycles to be used for an application.

If you have a machine, please furnish the above details alongwith the Machine specification such as KVA rating, Type of Secondary with details, size of Cylinder used, etc., so that I can suggest suitably.

Ranjit

-- Ranjit (ronjitsinha@rediffmail.com), April 01, 2002.