Upset welding (UW) is a resistance welding process which produces coalescence simultaneously over the entire area of abutting surfaces or progressively along a joint, by the heat obtained from resistance to electric current through the area where those surfaces are in contact.
Pressure is applied before heating is started and is maintained throughout the heating period. The equipment used for upset welding is very similar to that used for flash welding. It can be used only if the parts to be welded are equal in cross-sectional area. The abutting surfaces must be very carefully prepared to provide for proper heating.
The difference from flash welding is that the parts are clamped in the welding machine and force is applied bringing them tightly together. High-amperage current is then passed through the joint, which heats the abutting surfaces. When they have been heated to a suitable forging temperature an upsetting force is applied and the current is stopped. The high temperature of the work at the abutting surfaces plus the high pressure causes coalescence to take place. After cooling, the force is released and the weld is completed.
Pressure is applied before heating is started and is maintained throughout the heating period. The equipment used for upset welding is very similar to that used for flash welding. It can be used only if the parts to be welded are equal in cross-sectional area. The abutting surfaces must be very carefully prepared to provide for proper heating.
The difference from flash welding is that the parts are clamped in the welding machine and force is applied bringing them tightly together. High-amperage current is then passed through the joint, which heats the abutting surfaces. When they have been heated to a suitable forging temperature an upsetting force is applied and the current is stopped. The high temperature of the work at the abutting surfaces plus the high pressure causes coalescence to take place. After cooling, the force is released and the weld is completed.
3 comments:
Hey there! This is kind of off topic but I need some help from an established blog.
Is it very difficult to set up your own blog?
I'm not very techincal but I can figure things out pretty quick. I'm thinking about creating my
own but I'm not sure where to begin. Do you have any ideas or suggestions? Thank you
my blog post electronic dance music
Your style is so unique in comparison to other people I have read stuff from.
Many thanks for posting when you've got the opportunity, Guess I will just book mark this site.
My website - Blowjob Videos Free XXX Videos
Greetings from California! I'm bored to tears at work so I decided to check out your website on my iphone during lunch break. I really like the info you present here and can't wait to take a
look when I get home. I'm surprised at how quick your blog loaded on my phone .. I'm not even using WIFI, just 3G .
. Anyways, very good site!
Here is my webpage; bunny movie porn post **
Post a Comment