Metal-working hand tool

A metal-working hand tool for folding over sheet metal flanges, comprising

• a body adapted to rotate a body first axis of rotation;
• means for attaching said body to a power source for rotating said body about the first axis of rotation;
• a guide component extending from one end of said body;
• said attaching means comprising means to finding a screw-threaded bore concentric with the first axis in the body and opposite the guide component;
• said guide component comprising a guide pin, said guide pin having a head portion abutting an axial termination of the screw-threaded bore;
• a plurality of hardened metal roller means;
• and
• means for mounting said roller means to said body for free rotation about second axes, fixed with respect to said body, so that said roller means will impact upon and roll with respect to a sheet metal flange or the like.

A method of deforming an upturned sheet metal elongated flange of a metal joint to close the joint, utilizing a powered metal-working hand tool including a body adapted to rotate about a first axis of rotation and having a guide component extending outwardly from the body generally along the axis of rotation, and a plurality of hardened metal roller means each mounted for rotation with the body about second axes not coincident with the first axis, said method comprising the steps of

• disposing the metal joint so that the metal flange extends generally vertically,
• effecting energization of the tool to rotate the body,
• disposing the guide component so that it is in a direction generally parallel to the metal flange, and
• moving the guide component into contact with a side of the joint while moving the tool generally horizontally along the direction of elongation of the flange, so that the roller means impact upon and roll with respect to the flange to deform it so that it extends generally horizontally.

A method-working hand tool for folding over sheet metal flanges, comprising

• a body adapted to rotate about a first axis of rotation,
• means for attaching said body to a power source for rotating said body about the first axis of rotation,
• a guide component extending outwardly from one end of said body generally along the first axis of rotation,
• a plurality of hardened metal roller means, and
• means for mounting said roller means to said body for free rotation about second axes, fixed with respect to said body, so that said roller means will impact upon and roll with respect to a sheet metal flange or the like, said roller means mounting means comprising a shaft for each roller means disposed so that each said second axis makes a positive angle .alpha. about 35.degree. to 55.degree. with respect to said first axis of rotation.