Weld Cycle Terms & Definitions
There are many programmable settings in a resistance weld cycle. Here we will briefly look at some of these settings:
What is Squeeze Time?
Squeeze time is a programmable delay timer in the weld schedule needed to allows electrodes to travel, contact the material to be welded and build up to the set force before electrical current is applied to the transformer.
How is Squeeze Time Measured?
Squeeze time is measured in cycles. One cycle of squeeze equals 1/60 second.
Who Determines Squeeze Time?
The set-up person should determine the proper amount of squeeze time.
What is Weld Time?
Weld time is the programmable time that the weld current is being applied to the materials to be welded. The total amount of weld time is equal to one impulse.
What Determines Weld Time?
The length of the impulse should be determined by the type and thickness of the material being welded.
What is Hold Time?
Hold time is the time that electrode force is maintained on the work piece after the current has ceased. Hold time is important because it allows the material to fuse together and solidify. Hold time is typically a very short time – usually, 5 to 10 cycles.
What is Off Time?
Off time is the programmable delay in which the electrodes come off the material in an automatic sequence or “repeat mode.” Off time is typically set to zero. Depending on the manufacturer of the weld control, any number other than zero may automatically put the control in “repeat mode.”