Apparatus for forming sheet-metal fin-strips for heat-exchangers

Claim 1

An apparatus for the transformation of metal-stock into individual, apertured, planar fin-strips for stacked use in structuring tubular heat-exchanger core-units, comprising a. a supporting framework, b. a pair of cylinders journaled one above the other on the framework for passage of metal-stock between the peripheries of the cylinders, c. one cylinder having a plurality of circumferentially spaced, radially disposed, elongated openings arranged uniformly axially of the cylinder, d. the openings of one radially disposed series being axially staggered with respect to the openings of the next adjacent series, e. the other cylinder having a matching series of recesses formed therein, f. an annual series of punches reciprocally embraced in the openings in the one cylinder, each punch having a slot adjacently the inner end thereof, g. a series of flanged annuluses positioned between the respective series of punches with the flange on each extending into the slot of the adjacent punch, h. a lobe associated with each annulus in the plane thereof extending radially toward the other cylinder for successively activating the respective series of punches during the rotation of the cylinders, i. a bar fixed directly forward and parallel with the pair of cylinders the exposed face of which is tapered to form a knifeedge disposed longitudinally of the bar, j. a supplemental cylinder journaled on an axis aligned with the ridge on the bar, k. a second bar recessed inwardly of the periphery of the supplemental cylinder and having its exposed face tapered to form a knife-edge disposed longitudinally of the second bar in vertical alignment with the first bar knife-edge, and 1. a motor-driven gear-pulley-train on the framework for synchronizing the rotation of the pair of cylinders and the supplemental cylinder to sever the emerging fin-strip into predetermined uniform lengths.

Claim 2

An apparatus for the transformation of metal-stock into individual, apertured, planar fin-strips for stacked use in structuring tubular heat-exchanger core-units, comprising a. a supporting framework, b. a pair of cylinders journaled one above the other on the framework for passage of metal-stock between the peripheries of the cylinders, c. one cylinder having a plurality of circumferentially spaced, radially disposed, elongated openings arranged uniformly axially of the cylinder, d. the openings of one radially disposed series being axially staggered with respect to the openings of the next adjacent series, e. the other cylinder having a matching series of recesses formed therein, f. an annual series of punches reciprocally embraced in the openings in the one cylinder, each punch having a slot adjacently the inner end thereof, g. a series of flanged annuluses positioned between the respective series of punches with the flange on each extending into the slot of the adjacent punch, h. a lobe associated with each annulus in the plane thereof extending radially toward the other cylinder for successively activating the respective series of punches during the rotation of the cylinders, i. a bar fixed directly forward and parallel with the pair of cylinders the exposed face of which is tapered to form a knifeedge disposed longitudinally of the bar, j. a supplemental cylinder journaled on an axis aligned with the ridge on the bar, k. a second bar recessed inwardly of the periphery of the supplemental cylinder and having its exposed face tapered to form a knife-edge disposed longitudinally of the second bar in vertical alignment with the first bar knife-edge, and 1. a motor-driven gear-pulley-train on the framework for synchronizing the rotation of the pair of cylinders and the supplemental cylinder to sever the emerging fin-strip into predetermined uniform lengths.

Claim 7

An apparatus for effecting the transformation of thin metal-stock into predetermined length, planar fin-strips with elongated flanged apertures for use in structuring tubular heat exchanger, comprising a. a supporting framework for mounting a supply of metal-stock, b. a pair of opposed cylinders journaled on the framework for the passage of the metal-stock between the peripheries of the cylinders, c. each of the cylinders having a plurality of radial series of axially spaced registering openings formed therein and spaced uniformly around and along the cylinders, d. an equal plurality of reciprocable punches embraced in the openings of one of the cylinders, e. cam means operatively connected in said one cylinder for successively activating the punches during the continuous and uninterrupted rotation of the cylinders to form apertures in the metal-stock advancing between the cylinders, f. other means operatively connected with the cylinders for advancing the metal-stock to the cylinders, g. a pair of members operatively connected with the cylinders and being located in the path of the stock discharge from the cylinders and being operable synchronically with the cylinders to sever the advancing stock into uniform-length fin-strips, h. motor means operatively connected in the apparatus for causing the synchronized rotation of the cylinders, actuation of the cam means and the stock-severing members, i. a guide-means arranged on the framework forwardly of the fin-strip severing members for receiving the severed fin-strips, j. other means operatively associated with the guide means for accelerating the advance of each severed fin-strip and successively discharging them, k. and a fin-strip stacking element operatively associated with said other means for receiving the severed fin-strips.

Claim 8

An apparatus for effecting the transformation of thin metal-stock into predetermined length, planar fin-strips with elongated flanged apertures for use in structuring tubular heat exchanger, comprising a. a supporting framework for mounting a supply of metal-stock, b. a pair of opposed cylinders journaled on the framework for the passage of the metal-stock between the peripheries of the cylinders, c. each of the cylinders having a plurality of radial series of axially spaced registering openings formed therein and spaced uniformly around and along the cylinders, d. an equal plurality of reciprocable punches embraced in the openings of one of the cylinders, e. cam means operatively connected in said one cylinder for successively activating the punches during the continuous and uninterrupted rotation of the cylinders to form apertures in the metal-stock advancing between the cylinders, f. other means operatively connected with the cylinders for advancing the metal-stock to the cylinders, g. a pair of members operatively connected with the cylinders and being located in the path of the stock discharge from the cylinders and being operable synchronically with the cylinders to sever the advancing stock into uniform-length fin-strips, h. motor means operatively connected in the apparatus for causing the synchronized rotation of the cylinders, actuation of the cam means and the stock-severing members, i. a guide-means arranged on the framework forwardly of the fin-strip severing members for receiving the severed fin-strips, j. other means operatively associated with the guide means for accelerating the advance of each severed fin-strip and successively discharging them, k. and a fin-strip stacking element operatively associated with said other means for receiving the severed fin-strips.