US3265276A - Apparatus for making heat exchanger conduits with a wire coil helically wound thereon - Google Patents

Apparatus for making heat exchanger conduits with a wire coil helically wound thereon Download PDF

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US3265276A
US3265276A US382768A US38276864A US3265276A US 3265276 A US3265276 A US 3265276A US 382768 A US382768 A US 382768A US 38276864 A US38276864 A US 38276864A US 3265276 A US3265276 A US 3265276A
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wire
conduit
mandrel
winding
coil
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Roffelsen Franciscus
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F17/00—Jacketing or reinforcing articles with wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49377—Tube with heat transfer means
    • Y10T29/49378—Finned tube
    • Y10T29/49382—Helically finned
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5188—Radiator making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53113—Heat exchanger

Definitions

  • Metallic heat exchanger pipes are known on whose outer surface there is secured a helically wound wire coil of circular or non-circular cross section for increasing heat transfer therefrom or thereto.
  • the manufacture of such heat exchangers has been effected until now exclusively by initially preforming the wire coil, winding the same on a pipe and soldering the same at its points of contact with the pipe.
  • Such a process and the apparatus for carrying it out have been found to be uneconomical; therefore heat exchanger pipes of this type have not proven to be successful.
  • Their manufacture according to the methods and apparatuses employed until now has also been rendered difficult since unassembled wire coils of great length can be handled only with great difficulty.
  • I provide an apparatus for making heat exchanger pipes or conduits with a non-circular wire coil wound helically thereon which is secured with a straight or inwardly curved, i.e. concave, portion of each of its windings to the outer surface of the conduit.
  • My apparatus also permits the coil of a wire drawn from a supply coil and produced by winding the wire on a mandrel and being ejected or shoved off the latter in the direction of its axis, to be wound directly on a pipe passing the winding mandrel in an axial direction while being rotated about its axis, and with the help of a solder band supplied at the same time between the conduit and the coil, to be soldered to the conduit by heating.
  • my invention comprises a drive mech anism for continuously rotating the pipe that is to be wound and simultaneously feeding the same in the axial direction thereof, a stationary winding device for the wire coil with a winding mandrel fixed with respect to the conduit axis, and which has at least one flat or inwardly curved peripheral surface aligned substantially tangential to the periphery of the conduit, a winding head rotating about the mandrel axis for drawing the wire from a stationarily mounted supply coil and winding the wire ice into a coil about the mandrel and ejecting or shoving the coil simultaneously off the mandrel, a device for supplying from a supply coil a band of solder between the conduit and the wire coil, and a heating device for heating the pipe with the coil wound thereon to soldermg temperature.
  • the winding device produces a continuous, practically endless wire coil ejected or shoved off the mandrel in a direction toward the periphery of the conduit and having wire windings lying directly near one another.
  • the position of the wire windings with respect to one another on the conduit is determined by the peripheral rotary speed of the conduit passing the winding mandrel, the feed or displacement speed of the conduit in the direction of its axis determining the pitch of the helical windings with which the coil is Wound on the conduit.
  • the peripheral rotary speed of the conduit must be at least the same speed as that at which the wire coil is shoved off the winding mandrel. In such a case the coil is wound practically without the application of any tension onto the conduit and the bases of the wire windings lie on the conduit directly near one another.
  • the driving mechanism for the conduit that is to be wound is so disposed that conduits with diameters that are greatly different from one another can be engaged thereby with speeds adjustable over broad limits and can be both rotated as well as axially displaced.
  • the rotary and axial feed drive for the conduit includes in accordance with my invention three gears distributed about the conduit axis at a driven spindle head through which the conduit extends.
  • the three gears are held in radial bearings adjustable with respect to the conduit, and mesh in a fiat spiral thread coaxial with the conduit axis.
  • the fiat spiral thread is on a bearing plate in the spindle head and is rotatable about the conduit axis.
  • the radially adjustable bearings of the gears in the spindle head corresponding somewhat to the jaws of a tensioning chuck, permit the gears, with their tooth crests advantageously sharpened, to form cutting edges extending in the peripheral direction, to press so fir mly against a conduit of chosen cross section which is shoved into the spindle head, that the conduit is positively rotated with the spindle head when the latter is placed in rotation.
  • the conduit is also displaced axially by the gears rotating about their own axes.
  • the gears meshing in the flat spiral thread are rotated about their axes with a speed determined by the pitch or slope of the spiral thread and the number of gear teeth.
  • This speed determining the axial feed of the conduit can also be changed, desirably during reversal of the feed direction, by rotating the circular plate or face plate provided with the fiat spiral thread in one or the other rotary direction about the conduit axis.
  • the spindle head and the circular plate provided with the fiat spiral thread are capable of being driven by a transmission that is infinitely controllable independently of one another. It is generally sufiicient in such a case that the spindle head be able to be driven only in one direction since it is hardly significant for heat exchangers as to whether the wire coil is wound helically in a right or left direction.
  • the transmission for the circular plate ought to be so constructed that it is able to be driven from a stationary position in either rotary direction.
  • a function of the winding device is to draw off the wire which is to be formed into a wire coil from a supply coil with a stationary mounting in order to wind the wire around a mandrel fixed with respect to the conduit axis and to eject or shove off the thus-formed wire coil continually from the mandrel in a direction substantially tangential to the conduit periphery.
  • 1 provide a winding device which comprises a driven main shaft mounted with its periphery rotatable in a stationary housing, and a chuck or collet in one of the ends of the main shaft and rotatable about the axis thereof.
  • the collet holds a non-circular winding mandrel projecting above the end face of the main shaft.
  • the wire runs through a central opening in the opposite end of the main shaft, through a wall thereof and tangentially over a guide roller mounted therein toward the winding mandrel.
  • the mandrel collet is provided with a peripheral gearing meshing with a pinion gear mounted within the main shaft.
  • the pinion gear is mounted at one end of a shaft parallel to the main shaft and having at its other end a second pinion gear similar to the firstmentioned pinion gear and rotatable therewith.
  • the second pinion gear meshes with an outer gearing like the outer gearing of the mandrel collet provided on a ring fixed in the housing of the winding device, coaxial with and surrounding the main shaft.
  • the rotatable mounting of the mandrel collet in the main shaft and the transmission inserted between the mandrel collet and the housing of the winding device cause the mandrel to rotate always with the same number of revolutions in the opposite rotary direction as that of the main shaft when the main shaft is driven so that in spite of its arrangement on the rotary main shaft it is stationary with respect to the conduit axis, and a nonrotating wire coil is ejected or shoved off therefrom. Consequently, the possibility presents itself thereby of simultaneously drawing off the wire to be wound int-o wire coils from a supply coil having a stationary mounting.
  • a non-circular mandrel is necessary because the Windings of the Wire coil should have a straight or inwardly curved or bent portion in engagement with the conduit so that on the one hand the contact surfaces between the conduit and the coil which are vital for heat transfer can be thereby increased and on the other hand the coil can be more securely connected to the conduit, and the windings of the coil can always be uniformly oriented with respect to one another.
  • the straight or inwardly curved portion of the windings of the wire coil runs out onto the surface of the conduit, the flat or inwardly curved portion of the mandrel outer surface must face toward the conduit axis and must be oriented at least substantially parallel to the conduit axis.
  • the non-circular mandrel exercises a tensile or pulling action on the wire fed thereto that is necessary for the main shaft to draw off the wire from the supply coil with a suitable tension for tightly winding the same.
  • the ejection or shoving off of the wire coil from the mandrel is effected by a ramp rising from the end face of the main shaft surrounding and slightly spaced from the base of the mandrel to about the diameter of the wire that is to be wound. So as always to be able to employ a suitable ramp having the diameter of the respective wire that is to be wound, the ramp is located on an interchangeable or replaceable plate connected with the main shaft.
  • a slide or pusher member is located adjacent and above the end face of the main shaft at which the mandrel is located.
  • the slide is displaceably guided on the housing of the winding device radially with respect to the periphery of the mandrel and is provided with a pin which is inserted in a groove-shaped cam track at the end face of the main shaft and is also provided with a nose portion facing the flat or inwardly curved surface portion of the mandrel.
  • wire coil windings are to be formed with a plurality of straight or inwardly curving portions, a corresponding plurality of slides displaceable radially with respect to the mandrel can be provided above the end face of the main shaft.
  • the wire is guided beneath the main shaft over a guide roller that is spring mounted.
  • the spool or coil containing the wire supply can be located on a rotatable carrier or support acted upon by a brake with a force dependent upon the wire tension in such a direction that the applied brake force becomes less for a stronger tension of the wire and becomes greater for a relieved tension or slackening of the wire.
  • the brake simultaneously prevents a considerable amount of wire from continuing to run off the supply coil since the latter would otherwise continue rotating when the winding device was stopped if it were not for such a brake.
  • FIG. 1 is a side-elevational view of the apparatus for making heat exchange conduits with a wire coil wound helically thereon;
  • FIG. 2 is a side view partly in longitudinal section of the rotary and axial feeding mechanism for the conduit that is to be wound;
  • FIG. 3 is a left-hand end view of the mechanism of FIG. 2 with the face plate removed;
  • FIG. 4 is a diagrammatic view of one of the gears shown in FIGS. 2 and 3 in engagement with a conduit that is to be wound;
  • FIG. 5 is an axial cross section of the apparatus for winding a wire into a coil which is to be subsequently wound helically on a conduit;
  • FIG. 6 is a top plan view of FIG. 5.
  • a machine bed 1 on which there is mounted a rotary and axial feed drive 2 for longitudinally feeding a conduit or pipe 3 in the direction of the arrow associated therewith.
  • a related transmission 4 Adjacent the drive 2 is located a related transmission 4 having an on-off switch 5 for the rotary mechanism of the drive, an on-off switch 6 for the axial feed mechanism of the drive, a control or regulator 7 for infinitely varying the rotary speed in a known manner and a similar control or regulator 8 for infinitely varying the axial feed.
  • a winding device 9 for the Winding wire 11 which runs upwardly from below the bed l to the coil 10.
  • a supply roll 12 for introducing a band of solder l3 helically wound on the conduit 3 so that it is located between the conduit 3 and the coil 10.
  • a supporting device or stand 14 is also mounted on the machine bed 1 for supporting the conduit when completely wound with the wire coil, and between the supporting device 14 and the winding device 9 there is located a heating coil 15 suitably energized for inductively heating the conduit 3 and the coil 10 to soldering temperature.
  • the wire 11 is drawn off a supply coil 16 by the winding device 9 in a manner hereinafter described with respect to FIG. 5.
  • the supply coil 16 is mounted in a bearing stand 18 beneath the machine bed 1 on a special base plate 17.
  • the rotation of the supply coil 16 can be slowed or stopped by the brake 28 which can be applied against the flange of the coil 16.
  • the wire 11 runs from the coil 16 first over two guide rollers 17a, 17b having fixed mountings between which a loop is formed and then passes over an additional guide roller 21 from which it runs tangentially in the direction of the rotary axis of the winding device 9.
  • An idler roller 18a is suspended in the loop of the wire 11.
  • the winding device as well as the rotary and feed mechanisms for the conduit 3 are driven by a common power source, which can be started and stopped by the switch 25 provided on the machine bed 1.
  • the rotary and feed devices, by means of the switches 5 and 6, respectively, and the winding device by means of the switch 26, can also similarly be connected and disconnected to the common power source.
  • the rotary and feed drive for the conduit 3 consists essentially of a three-jaw chuck 3t rotatably mounted in the housing 28 which is able to be driven in both rotary directions by the gear 27 about the axis of the conduit.
  • the chuck Si is rotatably driven through a gear '29 independently of the rotatable housing 28.
  • a gear 32 is rotatably mounted in a plane radial to the conduit at each of the radially adjustable jaws 31 of the three-jaw chuck 3b.
  • the gtars 32 mesh in a flat spiral thread 33a provided at the inner side of the housing cover or face plate 33 which is screwed to the housing 28.
  • the crest of the gear teeth as shown in FIG. 4 is offset on one side a distance 3 5- from the rest of the gear body and thereby, as well as by chamfer-ing the other side of the gear body,
  • the winding device 9 as shown in FIG. 5, has a driven main shaft 35, in the upper enlarged or thickened end of which there is inserted a collet or chuck 36 for the winding mandrel 37 that projects above the upper surface of the main shaft 35.
  • the collet 36 is readily rotatable about the axis of the shaft 35.
  • the upper end of the collet 36 is radially slotted and is provided with an external thread for engaging with a corresponding internal thread of a tightening or tensioning ring 38 by means of which and of the consequently closely engaged conical contact surfaces between the collet 36 and the tensioning ring 38, the slotted portions of the collet 36 are forced radially inwardly and the shaft 37a of the mandrel 37 is clamped or jammed centrally in the collet 36.
  • the collet 36 is mounted in the main shaft 35 by means of a lower needle or roller bearing 39 and an upper ball bearing 40.
  • the main shaft 35 is mounted in a ring sleeve or bushing 42 by means of two ball bearings 41, the sleeve 42 'in turn being mounted in the housing 43 of the winding device 9 for rotation about the axis of the main shaft 35.
  • the sleeve 42 can be fixed against rotation with the help of a tensioning screw 44 extending through an opening 45 of the housing 4-3 into an opening in the sleeve 42 when in registry therewith, and tightened by a nut 44a.
  • the disconnectable power drive acts on the main shaft 35 between the bearings 41, for example by means of a V-belt pulley or a gear (not shown).
  • the main shaft 35 is coupled with the mandrel collet 36 through a transmission which rotates the mandrel collet 36 in a rotary direction opposite to that of the main shaft 35 but with the same speed.
  • This transmission consists of an outer gearing 46 provided on the peripheral surface of the collet 36 and a similar outer gearing 47 at the upper cross-seotionally reduced end 42a of the sleeve 42, as well as two similar pinion gears 48 and '49 secured one beneath the other respectively at the ends of an auxiliary shaft 50, mounted parallel to the axis of the main shaft 35 in ball bearing 51.
  • the pinion gear 48 meshes in the outer gearing 46 of the mandrel chuck 36 and the pinion gear 49 meshes in the outer gearing 47 at the neck 42a of the sleeve 42.
  • the transmission causes the mandrel 37 to remain stationary with respect to the fixed housing 43 and thereby also with respect to a conduit 3 moving past the winding device as the main shaft 35 rotates at a suitable speed.
  • the wire 11 that is to be wound on the mandrel 37 passes through a bushing 52 inserted in the lower end of the main shaft 35 which consists of a wear-resistant material, and then through a radial slot 53 extending along the length of the main shaft 35 and opening to the outside thereof.
  • the wire 11 then peripherally engages a guide roller 54 mounted at the upper end of the main shaft and rotatable about a substantially tangential axis.
  • the wire 11 then extends from the roller 54 to the mandrel 37 near and above a plate 55 that is replaceably or interchangeably mounted on an upper surface of the main shaft 35 and is rotatable therewith, the plate 55 and shaft 35 together thus forming a winding head.
  • the plate 55 is provided with a circular ramp 56 at the upper edge of a bore through which the mandrel 37 extends.
  • the ramp 56 rises or slopes upwardly from the outer surface of the plate 55 about the thickness or diameter of the specific wire 11 that is to be wound and serves the purpose of pushing the respective portion of the coil last wound on the mandrel in an upward direction by engaging beneath the last winding thereof.
  • a radially displaceable slide or push rod 57 located above the upper side of the plate 55 is guided on the housing 43 of the device.
  • the slide 57 has a nose portion 57a extending toward the mandrel 37 that presses at each rotation against one or more of the wire windings lying on the mandrel 37.
  • the radial displacements or oscillations of the slide 57 are effected by an annular groove 58a eccentric to the shaft 35 and formed as a cam track in the upper side of a ring 58, which is adjustable with clamping screws 59 in the peripheral direction and secured therewith to the main shaft 35.
  • An extension 57b at the lower side of the slide 57 is slidably inserted in the groove 58a.
  • the location of the coil running from the mandrel 37 to the conduit 3 moving past the winding device can be adjusted while the respective location of the groove ring 58 on the main shaft 35 determines the location or locations at which the slide 57, as well as possible additional slides, press the wire onto or against the mandrel 37,
  • Apparatus for making metallic heat exchanger conduits with a wire coil wound thereon comprising drive means for continuously rotating a conduit to be Wire-coil wound and for simultaneously displacing the conduit continuously along a path in the direction of its axis, stationary wire supply means for supplying wire to be formed into a Wire coil, winding means for forming the Wire coil, said winding means comprising a winding mandrel adjacent said path and stationary relative to the conduit axis, said mandrel having a periphery comprising a plurality of surfaces, each of said surfaces being other than a convex surface, and winding head means rotatable about said mandrel for drawing the Wire from said wire supply means and for winding the wire about said mandrel in the form of a wire coil and for simultaneously ejecting the wire coil from said mandrel toward the conduit for winding thereon, means for supplying a band of solder between the conduit and the wire coil simultaneously as the wire is wound on the conduit, and heating means for
  • Apparatus for making metallic heat exchanger conduits with a wire coil wound thereon comprising drive means for continuously rotating a conduit to be wire-coil wound and for simultaneously displacing the conduit along a path in the direction of its axis, said drive means comprising three gears spaced about the axis of the conduit and mounted for radial adjustment with respect to the conduit, a rotatably driven spindle head at which said gears are mounted, said spindle head having an opening through which the conduit extends between said three gears, and plate means located transversely to and rotatable about the axis of the conduit and having a face adjacent said gears, and a flat spiral thread coaxial with the conduit formed on said face in meshing engagement with said gears, stationary wire supply means for supplying wire to be formed into a wire coil, winding means for forming the wire coil, said winding means comprising a winding mandrel adjacent said path and stationary relative to the conduit axis, said mandrel having a periphery comprising
  • Apparatus for making metallic heat exchanger conduits with a wire coil wound thereon comprising drive means for continuously rotating a conduit to be wire-coil wound and for simultaneously displacing the conduit along a path in the direction of its axis, said drive means comprising three gears spaced about the axis of the conduit and mounted for radial adjustment with respect to the conduit, said gears having teeth formed with a sharp cutting edge at the crest thereof extending in a direction toward the peripheral surface of the conduit for cutting into said peripheral surface, a rotatably driven spindle head at which said gears are mounted, said spindle head having an opening through which the conduit extends between said three gears, and plate means located transversely to and rotatable about the axis of the conduit and having a face adjacent said gears, and a flat spiral thread coaxial with the conduit formed on said face in meshing engagement with said gears, stationary wire supply means for supplying wire to be formed into a wire coil, winding means for forming the wire coil, said winding means comprising
  • Apparatus for making metallic heat exchanger conduits with a wire coil wound thereon comprising drive means for continuously rotating a conduit to be wire-coil wound and for simultaneously displacing the conduit along a path in the direction of its axis, said drive means comprising three gears spaced about the axis of the conduit and mounted for radial adjustment with respect to the conduit, a rotatably driven spindle head at which said gears are mounted, said spindle head having an opening through which the conduit extends between said three gears, and plate means located transversely to and rotatable about the axis of the conduit and having a face adjacent said gears, and a flat spiral thread coaxial with the conduit formed on said face in meshing engagement with said gears, infinitely variable transmission means for rotatably driving said spindle head and said plate means independently of one another, stationary wire supply means for supplying wire to be formed into a wire coil, winding means for forming the wire coil, said winding means comprising a winding mandrel adjacent said path
  • Apparatus according to claim 6 including drive means for driving said winding means, said transmission for said spindle head and said plate means being driven from said drive means.
  • Apparatus for making metallic heat exchanger conduits with a wire coil wound thereon comprising drive means for continuously rotating a conduit to be wire-coil wound and for simultaneously displacing the conduit along a path in the direction of its axis, stationary wire supply means for supplying wire to be formed into a wire coil, winding means for forming the wire coil, said winding means comprising a housing, a driven main shaft rotatably mounted in said housing, collet means located at one end of said main shaft and rotatable about the axis of said main shaft, a winding mandrel secured in said collet and having an end projecting therefrom, said projecting end of said mandrel being located adjacent said path of said conduit and being stationary relative to the conduit axis, said mandrel having a periphery comprising a plurality of surfaces, each of said surfaces being other than a convex surface, said main shaft having an opposite end provided with a central opening, a guide roll rotatably mounted on said main shaft, the
  • Apparatus for making metallic heat exchanger conduits with a wire coil wound thereon comprising drive means for continuously rotating a conduit to be wire-coil wound and for simultaneously displacing the conduit along a path in the direction of its axis, stationary wire supply means for supplying wire to be formed into a wire coil, winding means for forming the wire coil, said winding means comprising a housing, a bearing bushing mounted in said housing, a driven main shaft rotatably mounted in said bearing bushing, said bearing bushing being adjustable about the axis of said main shaft, collet means located at one end of said main shaft and rotatable about the axis of said main shaft, a winding mandrel secured in said collet and having an end projecting therefrom, said projecting end of said mandrel being located adjacent said path of said conduit and being stationary relative to the conduit axis, said mandrel having a periphery comprising a plurality of surfaces, each of said surfaces being other than a convex surface, said
  • Apparatus according to claim 8 wherein said means for simultaneously ejecting the wire coil from said mandrel comprises a ramp rising from an end face of said main shaft up to about the diameter of the wire being wound, said ramp surrounding and slightly spaced from the secured end of said mandrel.
  • Apparatus for making metallic heat exchanger conduits with a wire coil wound thereon comprising drive means for continuously rotating a conduit to be wire-coil wound and for simultaneously displacing the conduit along a path in the direction of its axis, stationary wire supply means for supplying wire to be formed into a wire coil, winding means for forming the wire coil, said winding means comprising a housing, a driven main shaft rotatably mounted in said housing, collet means located at one end of said main shaft and rotatable about the axis of said main shaft, a winding mandrel secured in said collet and having an end projecting therefrom, said projecting end of said mandrel being located adjacent said path of said conduit and being stationary relative to the conduit axis, said mandrel having a periphery comprising a plurality of surfaces, each of said surfaces being other than a convex surface, said main shaft having an opposite end provided with a central opening, a guide roll rotatably mounted on said main shaft, the
  • Apparatus for making metallic heat exchanger conduits with a wire coil wound thereon comprising drive means for continuously rotating a conduit to be Wire-coil wound and for simultaneously displacing the conduit along a path in the direction of its axis, stationary wire supply means for supplying wire to be formed into a wire coil, winding means for forming the wire coil, said winding means comprising a housing, a driven main shaft rotatably mounted in said housing, collet means located at one end of said main shaft and rotatable about the axis of said main shaft, a winding mandrel secured in said collet and having an end projecting therefrom, said projecting end of said mandrel being located adjacent said path of said conduit and being stationary relative to the conduit axis, said mandrel having a periphery comprising a plurality of surfaces, each of said surfaces being other than a convex surface, said main shaft having an opposite end provided with a central opening, a guide roll rotatably mounted on said main shaft,
  • Apparatus for making metallic heat exchanger conduits with a wire'coil wound thereon comprising drive means for continuously rotating a conduit to be wire-coil wound and for simultaneously displacing the conduit continuously along a path in the direction of its axis, stationary wire supply means for supplying Wire to be formed into a wire coil, Winding means for forming the wire coil, said winding means being adjustable transversely to the axis of the conduit and comprising a winding mandrel adjacent said path and stationary relative to the conduit axis, said mandrel having a periphery comprising a pinrality of surfaces, each of said surfaces being other than a convex surface, and winding head means rotatable about said mandrel for drawing the wire from said wire supply means and for winding the wire about said mandrel in the form of a wire coil and for simultaneously ejecting the wire coil from said mandrel toward the conduit for Winding thereon, means for supplying a band of solder between the conduit and the wire coil

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Flexible Shafts (AREA)
  • Transmission Devices (AREA)
  • Wire Processing (AREA)
US382768A 1963-07-20 1964-07-15 Apparatus for making heat exchanger conduits with a wire coil helically wound thereon Expired - Lifetime US3265276A (en)

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DER0035722 1963-07-20

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US (1) US3265276A (de)
AT (1) AT246539B (de)
BE (1) BE650752A (de)
CH (1) CH419028A (de)
DE (1) DE1452409B2 (de)
NL (3) NL6408017A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482298A (en) * 1965-10-22 1969-12-09 Gen Motors Corp Method of manufacture of wire fin and tube heat exchangers
US3591910A (en) * 1969-10-22 1971-07-13 Gen Motors Corp Method of manufacture of wire fin and tube heat exchanger
US3684152A (en) * 1969-04-17 1972-08-15 Elektriska Svetsnings Ab Welding wire advancing unit
US4517735A (en) * 1983-10-28 1985-05-21 Airsensors, Inc. Apparatus and method for tensioning resistive wire
US20090056131A1 (en) * 2007-08-31 2009-03-05 Retermia Oy Equipment and Method for Making a Needle-Fin Tube, and a Needle-Fin Tube
US20180195807A1 (en) * 2013-10-31 2018-07-12 Heat Recovery Solutions Limited Heat exchange array

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1937350C3 (de) * 1969-07-23 1981-05-27 Franciscus Helmond Roffelsen Vorrichtung zum Herstellen von Wärmeaustauschern
DE2945282A1 (de) * 1979-11-09 1981-05-21 Elpag Ag Chur, Chur Vorrichtung zur herstellung von rohrstuecken vorgegebener laenge
DE3246044C1 (de) * 1982-12-13 1984-08-16 Balcke-Dürr AG, 4030 Ratingen Vorrichtung zum kontinuierlichen Axialvorschub von drehend angetriebenen Stangen
CN106744085A (zh) * 2016-12-09 2017-05-31 青岛卡沃斯智能制造有限公司 一种胶管玻璃纸智能仿形缠绕装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1778514A (en) * 1925-11-21 1930-10-14 Still William Joseph Method of and machine for making heat-transmitting tubes
US2374144A (en) * 1943-06-29 1945-04-17 B F Sturtevant Co Method of and machine for winding ribbons on heat exchange tubes
US2494286A (en) * 1946-07-19 1950-01-10 Samuel C Collins Apparatus for winding heat exchangers
GB898159A (en) * 1959-05-08 1962-06-06 Dewandre Co Ltd C Improvements in or relating to heat transmitting tubes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1778514A (en) * 1925-11-21 1930-10-14 Still William Joseph Method of and machine for making heat-transmitting tubes
US2374144A (en) * 1943-06-29 1945-04-17 B F Sturtevant Co Method of and machine for winding ribbons on heat exchange tubes
US2494286A (en) * 1946-07-19 1950-01-10 Samuel C Collins Apparatus for winding heat exchangers
GB898159A (en) * 1959-05-08 1962-06-06 Dewandre Co Ltd C Improvements in or relating to heat transmitting tubes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482298A (en) * 1965-10-22 1969-12-09 Gen Motors Corp Method of manufacture of wire fin and tube heat exchangers
US3684152A (en) * 1969-04-17 1972-08-15 Elektriska Svetsnings Ab Welding wire advancing unit
US3591910A (en) * 1969-10-22 1971-07-13 Gen Motors Corp Method of manufacture of wire fin and tube heat exchanger
US4517735A (en) * 1983-10-28 1985-05-21 Airsensors, Inc. Apparatus and method for tensioning resistive wire
US20090056131A1 (en) * 2007-08-31 2009-03-05 Retermia Oy Equipment and Method for Making a Needle-Fin Tube, and a Needle-Fin Tube
US8132326B2 (en) * 2007-08-31 2012-03-13 Retermia Oy Method and apparatus for forming a finned heat exchanger tube that includes an internal fin structure that is a spring formed from a spiral wire wound around a mandrel
US20180195807A1 (en) * 2013-10-31 2018-07-12 Heat Recovery Solutions Limited Heat exchange array
US20220325958A1 (en) * 2013-10-31 2022-10-13 Struthers Energy And Power Limited Helically coiled heat exchange array
US11802737B2 (en) * 2013-10-31 2023-10-31 Struthers Energy And Power Limited Helically coiled heat exchange array

Also Published As

Publication number Publication date
AT246539B (de) 1966-04-25
NL6408017A (de) 1965-01-21
BE650752A (de) 1964-11-16
NL7001567A (de) 1970-04-22
DE1452409A1 (de) 1970-01-29
NL7001568A (de) 1970-04-22
CH419028A (de) 1966-08-31
DE1452409B2 (de) 1971-02-04

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