A cylindrical body includes a cylindrical member, made by forming a metal plate into a cylindrical shape such that the two end faces of the metal plate face each other, and a nonmetallic adhesive member bonding the two end faces together. The two end faces each include an adhesive part, and the adhesive member is disposed between the adhesive parts of the end faces. The adhesive part of one end face is not parallel to the adhesive part of the other end face. Each end face also includes a contact part which is in contact with the contact part of the other end face.

A device for forming seam of elbow duct is provided, and the device for forming seam of elbow duct that molds a lockseam by bending a flange of one pair of adjacent unit members, of a plurality of unit members constituting the elbow duct, including a base that supports a lower portion of the one pair of unit members; an elevating part that moves the base up and down; an angle adjustment part that adjusts a supporting angle of the base; a fixing chuck that supports an inner circumferential surface of a connecting portion of the one pair of unit members; a rotating part that rotates the fixing chuck; and a forming part that bends the flange of the one pair of unit members in a state where the flange is in contact to each other, to form the seam.

An apparatus and method for forming a sealing portion on a duct member for use in connection to another duct member, with the connection between the duct members being substantially sealed from the egress of air in an air handling system.

A manufacturing assembly for manufacturing a metal part comprises a flattening module having a trolley and at least one pressing roller. The flattening module is movable along a hemming of the metal part. The flattening module comprises at least one pressing actuator that is arranged to move the at least one pressing roller in a determined pressing direction relative to the trolley and to place the pressure roller bearing against the free surface such that the at least one pressing roller exerts pressure on the free surface in said determined pressing direction. The pressure increases auto-adaptively with an altitude of the free surface in a direction opposite the determined pressing direction.

A system for automatically forming sheet metal tubes from blanks cut to size. The system having a mechanism for positioning a blank for processing. A lifting arrangement having a wrap strap and pressure pad to raise the blank to a forming station having a mandrel is positioned so that the wrap strap extends on either side of said mandrel and underneath the blank before a side wiper on each side of said mandrel forces the overlap of opposite edges of the blank along a length of the mandrel. The mandrel includes a clinching die bar along its length. A sealing mechanism with a vertically movable row of clinching prongs is lowered to attach the overlapping edges of the blank by clinching at multiple positions to form a tube around the mandrel before being removed by a gag bar and a stripper plate.

A method includes: bending a sheet about a mandrel such that the sheet is tubular, wherein the sheet includes a first longitudinal end portion and a second longitudinal end portion; engaging the first longitudinal end portion with the second longitudinal end portion; and passing the sheet between a first knurling wheel and a second knurling wheel such that the first knurling wheel applies a first knurling pattern to the sheet over the first longitudinal end portion and the second longitudinal end portion and the second knurling wheel applies a second knurling pattern to the sheet over the first longitudinal end portion and the second longitudinal end portion.

A system for automatically forming sheet metal tubes from blanks cut to size. The system having a mechanism for positioning a blank for processing. A lifting arrangement having a wrap strap and pressure pad to raise the blank to a forming station having a mandrel is positioned so that the wrap strap extends on either side of said mandrel and underneath the blank before a side wiper on each side of said mandrel forces the overlap of opposite edges of the blank along a length of the mandrel. The mandrel includes a clinching die bar along its length. A sealing mechanism with a vertically movable row of clinching prongs is lowered to attach the overlapping edges of the blank by clinching at multiple positions to form a tube around the mandrel before being removed by a gag bar and a stripper plate.

A roll forming apparatus including a plurality of stations each including and an upper roll and a lower roller, wherein a first number of stations are configured to form a pipe blank into a standing seam, and a second number of stations are configured to angle the seam. At least one station includes elongated top and bottom rollers for clinching the pipe blank during the roll forming process. Each elongated top roller is mounted on a pivotable shaft configured to pivot the elongated top rollers away the pipe blank to allow passage of at least one seam formed in the pipe blank.

A manufacturing assembly for manufacturing a metal part comprises a flattening module having a trolley and at least one pressing roller. The flattening module is movable along a stapling line of the metal part. The flattening module comprises at least one pressing actuator that is arranged to move the at least one pressing roller in a determined pressing direction relative to the trolley and to place the pressure roller bearing against the free surface such that the at least one pressing roller exerts pressure on the free surface in said determined pressing direction. The pressure increases auto-adaptively with an altitude of the free surface in a direction opposite the determined pressing direction.

A circular sheet metal duct having a sealant applied across the longitudinal seam. The sealant will improve the efficiency and will reduce or eliminate air leakage from the longitudinal seam. The sealant is applied during the manufacturing processes so that an installer does not have to seal the duct work. The method of manufacturing the sealant is provided.