| 摘要 |
A sheet metal cutting and forming tool is used in preparing the ends of square sheet metal tubes used in building construction as framing struts and studs. The tool receives a tube end axially wherein four cutting edges sever the tube at its four corners. Two opposing curved surfaces force two corresponding opposing sides of the tubing to roll up inside the tube, while two alternate curved surfaces force the alternate corresponding opposing sides to move outwardly into slots or onto laterally oriented guide surfaces. The resultant tube end provides opposing and axially or laterally extending sides spaced apart for receiving a second tube of the same size wherein the alternate sides may be fastened to the second tube sidewall while the rolled-up ends provide great rigidity, or alternately the lateral tube ends are easily fastened to a wall or similar surface.
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