1)May I know the range of resistance welding force?

2)Is it different for different applications? If so, may I know it with some examples?

3)How to measure this force using transducers?May I know the complete set up for converting this force into electrical signal?

4)How to control this force to improve weld quality?

-- Anita Deshmukh (anita1711@yahoo.com), April 15, 2004

Answers

References for force values are available from publications from RWMA.org and AWS.org In a few months, we will release a book that provides many available sources as well as a procedure for setting up weld force, current, and time. Ref. www.szabopublishing.com for availability.

For measuring force, several ways are available. One is to install a pressure transducer in the air or hydraulic line that operates the weld cylinder. Another is to put a mechanical transducer in the weld cylinder. Then either value can be measured electrically and compared to a go-no-go preset value. An alarm can be initiated if a low value no-go is reached.

An alternative is to get a resistance welding force gage from TJ Snow or others and measure the force between the electrodes. Then on a periodic routine, recheck it and adjust it to keep it in a ballpark.

Bob Szabo www.szabopub

-- bob szabo (bob@szabopublishing.com), June 15, 2004.