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How to size a chiller for spot welding machine?
Dec 17, 2021
Spot welding machine is a kind of
mechanical equipment. It adopts the principle of double-sided double-point
overcurrent welding. When working, two electrodes pressurize the workpiece so
that the two layers of metal form a certain contact resistance under the
pressure of the two electrodes, and the welding current changes from one When
the electrode flows through the other electrode, the two contact resistance
points form an instant thermal fusion, and the welding current flows from the
other electrode to the electrode along the two workpieces to form a loop
instantly, and will not damage the internal structure of the welded workpiece.
Because the resistance welding machine is in the working process, the
resistance head is prone to high temperature, which affects the accuracy of the
processed product, so a chiller is needed to cool it next to ensure the
accuracy of the processed product. The spot welding machine is equipped with a
chiller, which can improve the safety and stability of the welding work and extend
the life of the welding machine.
Industrial chillers used for spot welding
operate like recirculating coolers as they use the same closed-loop setups.
However, process chillers can be modified to handle industrial cooling on a
larger scale. Industrial chillers also have condensers, evaporators, and
automated temperature controls that make them more efficient. Air cooled
chiller is a good choice for spot welding machine, It’s easy to installation
and move.
A general rule for sizing a chiller is that,
for every 100KVA of welder, you should have about a 1-ton chiller. For example,
if you want to cool 4 welders that are 100KVA each, you will need a 4-ton
chiller. If you want to cool a 300KVA machine, you will need a 3-ton chiller.
See below for further sizing details.
To calculate for resistance welding:
BTU/hr = (welder KVA) x (duty cycle) x
(0.85) x (0.6) x 3415 BTU/hr
To calculate for resistance welding:
BTU/hr = (welder KVA) x (duty cycle) x (Eff
power supply) x (Eff heat collection) x 3415
Eff. power supply = the percentage of
output to input power
Eff. heat collection = the percentage of
heat absorbed by chilling water (varies by approximately 50-70%)
Duty cycle = weld time on/ time elapsed
As a leading industrial chiller
manufacturer, OUMAL CHILLER is dedicated to supplying high-quality process
chillers for a wide range of industries. Our knowledgeable staff will help you
find the industrial chiller best suited to your unique process application.
Contact us to choose the spot welding cooling system for your spot welding
machines. The air cooled chiller is your good choice for Industrial welding
chillers.