Tubing expander for boiler tubes or the like

Details Tubing expander for boiler tubes or the like Tubing expander for boiler tubes or the like

B - Operations, Transporting

21

D

26/91

B21D 39/06 (2006.01) B21D 39/12 (2006.01)

Patent

CA 1159635

IMPROVED TUBING EXPANDER FOR BOILER TUBES OR THE LIKE Abstract of the Disclosure An improved expander of this invention is used for ex- panding tubes into tube sheets and flaring the ends extend- ing therefrom, such as is common practice in the manufacture of boilers. The improved expander includes both straight rolls for expanding the tubes and tapered rolls for flaring the tube ends. The rolls are carried by a cage that en- circles a tapered mandrel, which when forced through the cage, causes the rolls to move relatively outwardly to de- form or expand the tube. The expander also includes a thrust member that has an end that is engageable with the face of the tube sheet and a stop member carried by the cage that engages the thrust member, when the rolls have entered the tubing to the proper distance, to deform the tube the desired amount as well as flaring the ends to the proper position.

367719

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