Device for forming sheet metal joints and seams

Claim 2

A metal-forming tool adapted to be used to fold sheet metal flanges to close metal joints, including: a body member having a central disc-shaped body portion having an outer annular convex work surface portion; a plurality of projecting hammer elements disposed in uniformly spaced positions about the convex work surface portion of the body member and each projecting from said convex surface in exposed striking position; means formed centrally of the disc-shaped body portion of the body member for mounting the same on a rotatable shaft of a rotary power tool for rotation thereby, whereby the plurality of exposed projecting hammer elements are moved in a circular path to engage and deform or bend a portion of a sheet of sheet metal to fold said portion to a desired position; said body member being formed of a pair of opposed substantially identical dishlike body sections joined at their marginal edges and each having said annular convex work surface portion With said hammer elements formed thereon disposed on opposite sides of said body member with the hammer elements of each dishlike body section projecting therefrom opposite the hammer elements on the section forming the opposite side of the body member.

Claim 3

A metal-shaping hammer means including: a body member formed of a pair of substantially identical dishlike body sections joined together along their marginal edge portions to form a unitary hollow body member; each dishlike body section having an annular concavo-convex peripheral work surface portion and a disc-shaped central support portion, said central portion being disposed in a plane spaced from the plane of the convex surface of said peripheral work surface portion; a plurality of projecting hammer elements disposed to project from the convex work surface of each of said body sections, said projecting hammer elements being disposed at uniformly spaced positions about the center of said body and projecting from the outer convex portion of the annular peripheral edge work surface portion thereof, said hammer elements being substantially teardrop in configuration along the surface of the convex peripheral work surface portion of the body member, with the larger bulbar portion of the teardrop shape disposed outwardly from the center of the body section to the edge thereof; said body sections being joined to position the teardroplike hammer elements at uniformly spaced points around the circumference of the outer marginal edge portion of the body member, so that hammer elements on one body section are spaced uniformly between the hammer elements on the opposite body section.

Claim 4

A metal-shaping hammer means including: a body member formed of a pair of substantially identical dishlike body sections joined together along their marginal edge portions to form a unitary hollow body member; each dishlike body section having an annular concavo-convex peripheral work surface portion and a disc-shaped central support portion, said central portion being disposed in a plane spaced from the plane of the convex surface of said peripheral work surface portion; a plurality of projecting hammer elements disposed to project from the convex work surface of each of said body sections, said projecting hammer elements being disposed at uniformly spaced positions about the center of said body and projecting from the outer convex portion of the annular peripheral edge work surface portion thereof, said hammer elements being substantially teardrop in configuration along the surface of the convex peripheral work surface portion of the body member, with the larger bulbar portion of the teardrop shape disposed outwardly from the center of the body section to the edge thereof; said body sections being joined to position the teardroplike hammer elements at uniformly spaced points around the circumference of the outer marginal edge portion of the body member, so that hammer elements on one body section are spaced uniformly between the hammer elements on the opposite body section.

Claim 5

A hammer means of the character set forth in claim 2 wherein the hammer element on each body section is formed by forging the same integral with the body section.

Claim 6

A device of the character set forth in claim 2 wherein the body member and the hammer elements thereon are formed by die shaping the same to provide the body member with the annular convex peripheral work surface portion.

Claim 7

A device of the character set forth in claim 2 wherein a central aperture is provided in the disclike central portions of the body sections to provide means for securing said body member to the rotatable shaft of a rotary power unit for rotating the same.

Claim 8

A device of the character set forth in claim 1 wherein the hammer elements of each body section are formed of a body of hard material deposited on the convex surface of the annular outer work surface portion of the body section and having a shape flaring outwardly from the inner portion of the hammer element toward the outer edge portion thereof and projecting to an increased degree from said convex work surface from the inner portion of the work surface toward the outer marginal edge thereof.

Claim 9

A metal-forming tool adapted to be used to form sheet metal flanges to close metal joints including: a body member formed of two substantially identical opposed dishlike body sections joined along their edges, each said body section having a planar disk-shaped central portion and an annular dishlike concavo-convex outer work surface portion; a plurality of projecting hammer elements disposed in uniformly spaced positions about the convex surface of the work surface portion of the body section and each projecting uniformly from said convex surface in exposed striking position; means formed centrally of the disc-shaped central portion of the body section for mounting the body member on the rotatable shaft of a rotary power tool for rotation thereby whereby the plurality of exposed projecting hammer elements on the convex work surface portions of the opposed body sections are moved in a circular path to be used to engage and deform or bend a portion of a sheet of sheet metal to fold said portion to a desired position.

Claim 10

A metal-forming tool adapted to be used to form sheet metal flanges to close metal joints including: a body member formed of two substantially identical opposed dishlike body sections joined along their edges, each said body section having a planar disk-shaped central portion and an annular dishlike concavo-convex outer work surface portion; a plurality of projecting hammer elements disposed in uniformly spaced positions about the convex surface of the work surface portion of the body section and each projecting uniformly from said convex surface in exposed striking position; means formed centrally of the disc-shaped central portion of the body section for mounting the body member on the rotatable shaft of a rotary power tool for rotation thereby whereby the plurality of exposed projecting hammer elements on the convex work surface portions of the opposed body sections are moved in a circular path to be used to engage and deform or bend a portion of a sheet of sheet metal to fold said portion to a desired position.

Claim 11

A metal-shaping hammer means including: a discuslike body member having an annular convex outer edge work surface portion on each side thereon and a central planar disclike portion diSposed in a plane spaced from and within the planes of the projecting convex work surface portions; said planar disclike portion having a central aperture therein for use in mounting the body member on a rotary shaft of a power unit to be driven thereby; said body member being formed of a pair of opposed dishlike body sections of substantially identical configuration having their concave portions facing inwardly toward each other and joined rigidly along their circumferential edge portions into a unit to provide the body member; each of said body sections having a plurality of projecting hammer elements disposed to project from the convex surface of said concavo-convex annular work surface portion of said body section, said projecting hammer elements being disposed at positions uniformly spaced about the center of said disclike central portion and projecting from the outer convex portion of the annular outer work surface portion, said hammer elements being flared outwardly in shape along the convex surface of the convex work surface portion of the body section with the larger portion of the flared shape disposed outwardly from the center of the body and extending to the outer edge of said body section.

Claim 12

A metal-shaping hammer means including: a discuslike body member having an annular convex outer edge work surface portion on each side thereon and a central planar disclike portion diSposed in a plane spaced from and within the planes of the projecting convex work surface portions; said planar disclike portion having a central aperture therein for use in mounting the body member on a rotary shaft of a power unit to be driven thereby; said body member being formed of a pair of opposed dishlike body sections of substantially identical configuration having their concave portions facing inwardly toward each other and joined rigidly along their circumferential edge portions into a unit to provide the body member; each of said body sections having a plurality of projecting hammer elements disposed to project from the convex surface of said concavo-convex annular work surface portion of said body section, said projecting hammer elements being disposed at positions uniformly spaced about the center of said disclike central portion and projecting from the outer convex portion of the annular outer work surface portion, said hammer elements being flared outwardly in shape along the convex surface of the convex work surface portion of the body section with the larger portion of the flared shape disposed outwardly from the center of the body and extending to the outer edge of said body section.

Claim 13

A metal-shaping hammer means of the character set forth in claim 8 wherein each of said sections is formed by die shaping the same to form the concavo-convex outer annular work surface section and to shape the hammer elements to project from the convex surface of said annular work surface section.

Claim 14

A hammer of the character set forth in claim 8 wherein the hammer elements on the annular convex work surface portions of each section are spaced uniformly circumferentially about the outer edge of the body sections to dispose said hammer elements on one body section spaced uniformly between the adjacent oppositely projecting hammer elements of the opposite work surface of the opposite body section.