US 7,578,161 B1Granted

Pneumaticaly driven pipe swedging and flaring tools

OwnerMarion M. Sizemoreinventor

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Abstract

Tools for expanding (i.e., flaring and swedging) the ends of metal tubes are configured for attachment to a powered impact hammer, such as an air hammer. A swedging tool for swedging an end of a metal tube has a swedging body with a die section for expanding the tube when driven thereinto and a flanged shank attached to the swedging body and configured for engagement by a powered impact hammer. A flaring tool for flaring an end of a metal tube includes a flaring body having a die section for flaring the tube when driven thereinto. A flanged shank is attached to the flaring body and configured for engagement by a powered impact hammer. A method for expanding an end of a metal tube entails attaching a die body for expanding the end of the metal tube to a powered impact hammer, aligning the die body with the inner diameter of the metal tube, activating the powered impact hammer, and urging the die body a determined distance into the metal tube.

Claims12

Dependent claims

A swedging tool for expanding an end of a first metal tube having a first inner diameter and a first outer diameter and an end of a second metal tube having a second inner diameter and a second outer diameter comprising

a swedging body having a die section for expanding the first metal tube when driven thereinto;
and
a flanged shank attached to said swedging body and configured for engagement by a powered impact hammer,
said die section comprising:
a cylindrical first body section having a diameter that is equal to the first inner diameter of the first metal tube, and a cylindrical second body section having a diameter that is equal to the first outer diameter the first metal tube, and a first chamfered transition from said first body section to said second body section, and
a cylindrical third body section having a diameter that is about equal to the second outer diameter of the second metal tube, and said cylindrical second body section having a diameter that is about equal to the second inner diameter the second metal tube, and a second chamfered transition from said second body section to said third body section.

3 more elements

Dependencies are inferred from the claim text.