On 15/08/2011 9:42 AM, Tim Wescott wrote:
On Sun, 14 Aug 2011 14:38:56 -0400, Tom Del Rosso wrote:

Is this an acceptable process?

http://www.ebaumsworld.com/video/watch/81732304/?lt=ep

I think not, with the way it stopped the lathe. Maybe if the fixed
piece was allowed to spin before stopping the motor there would have
been less of a jolt.

I think it looked reasonable giving the violence of the process.

I remember reading about friction welding in my metal shop textbook in
the late '70's. That book claimed that it was done by spinning up one
part and letting the momentum of the spinning part make the weld -- I
take it that now it's done by humongous motors.



I saw a 70's training video where the bearing cups for bicycle hubs were
being welded onto the central tube. Took much less than a second per
unit. Very neat.