US20030183311A1 - Device and method for manufacturing soft metal tube - Google Patents

Device and method for manufacturing soft metal tube Download PDF

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Publication number
US20030183311A1
US20030183311A1 US10/297,381 US29738102A US2003183311A1 US 20030183311 A1 US20030183311 A1 US 20030183311A1 US 29738102 A US29738102 A US 29738102A US 2003183311 A1 US2003183311 A1 US 2003183311A1
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United States
Prior art keywords
metal tube
line
tube
annealing
coiling
Prior art date
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Abandoned
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US10/297,381
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English (en)
Inventor
Noriaki Okamoto
Hideki Jou
Noriaki Nakao
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Daikin Industries Ltd
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Daikin Industries Ltd
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Filing date
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Assigned to DAIKIN INDUSTRIES, LTD. reassignment DAIKIN INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JOU, HIDEKI, NAKAO, NORIAKI, OKAMOTO, NORIAKI
Publication of US20030183311A1 publication Critical patent/US20030183311A1/en
Abandoned legal-status Critical Current

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    • 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/083—Supply, or operations combined with supply, of strip material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • 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
    • 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
    • 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
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/202—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with guides parallel to the tube axis
    • 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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • 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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
    • 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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/28—Drums or other coil-holders
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/60—Continuous furnaces for strip or wire with induction heating
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a method and a device for manufacturing a soft metal tube in which a hardening work is applied in manufacturing a heat transfer tube with its inside surface having a groove for a heat exchanger or the like. More specifically, the present invention relates to a measure to prevent contacted portions of the metal tube that is coiled in line from sticking together.
  • a heat transfer tube with its inside surface having a groove for a cross fin coil for an air conditioner shown in Japanese Patent Publication No. 61-32599 uses a soft copper plate as its material.
  • a soft copper plate for example, a copper alloy plate that is defied by “O-material” of the alloy number “C1220” in “Chart 4 Mechanical Property” in the JIS (the Japanese Industrial Standards) H 3300 “Plate and Line of Cupper and Cupper Alloy” may be used.
  • FIGS. 4 and 5 A process of manufacturing a heat transfer tube using the above-described soft cupper plate will be described referring to FIGS. 4 and 5.
  • groove working by rolling is applied to a copper plate by groove working means ( 61 ) in groove working step ( 51 ).
  • forming step ( 52 ) it is formed in a tube shape by forming means ( 62 ) in such a manner that the groove is located on an inside surface of the tube.
  • the copper tube (B) formed in this way is coiled regularly and in line by coiling in-line means ( 63 ) in coiling in-line step ( 53 ), and then it is installed to a bobbin for carrying out (C) in installment step ( 55 ) to be shipped subsequently.
  • the copper plate is hardened to be H-material (as defined in the above-described Chart 4) by rolling in the groove working step ( 51 ). Accordingly, only this process would just provide a hardened copper tube (B). Specifically, Vickers Hardness HV(0.5) [ ⁇ HV(4.9 N)] of the copper plate increases from 60-68 before working to 100-130 after working, Further, in the case of the heat transfer tube, its elongation percentage, one of important factors in forming the cross fin coil, decreases from 40% before working to 35% after working.
  • the copper tube (B) is annealed and softened in annealing step ( 54 ) that follows the coiling in-line step ( 53 ).
  • the copper tube (B) is coiled regularly and in line by a coiling machine ( 63 b ), applying a bending tendency to the hardened copper tube (B) by a bending roll ( 63 a ).
  • the copper tube (B) that is coiled in line can be provided as shown in FIG. 6( b ).
  • this copper tube (B) that is coiled in line is heated in an annealing furnace ( 64 ), a large anoxic furnace, and then it is removed out of the annealing furnace ( 64 ) and cooled naturally, as shown in FIG. 6( d ). In this way, the copper tube (B) that is coiled in line can be softened.
  • a body (C 1 ) of the bobbin for carrying out (C) is inserted in the center of the coils of the copper tube (B), and a pair of flanges (C 2 , C 2 ) are attached to both ends of the body (C 1 ), respectively.
  • the copper tube (B) that is coiled in line can be installed to the bobbin (C).
  • the reason the copper tube (B) is not annealed after it has been coiled in line to the bobbin (C) is to prevent the bobbin (C) from being heated.
  • the soft cupper tube (B) with its inside surface having a groove can be provided as shown in FIG. 6( f ).
  • it is a major object of the present invention is to prevent contacted portions of a soft metal tube from sticking together because of annealing applied for softening the metal tube, by applying an appropriate manufacturing method, when the soft metal tube, such as a heat transfer tube with its inside surface having a groove, is manufactured in which a hardening work is applied to the metal tube and it is coiled in line for its installment to an bobbin, resulting in an easy removal (un-coiling) of the metal tube from the bobbin.
  • an appropriate manufacturing method when the soft metal tube, such as a heat transfer tube with its inside surface having a groove, is manufactured in which a hardening work is applied to the metal tube and it is coiled in line for its installment to an bobbin, resulting in an easy removal (un-coiling) of the metal tube from the bobbin.
  • the present invention provides a method and a device for manufacturing a soft metal tube in which the metal tube is coiled in line after being annealed, contrary to a conventional way in which the metal tube is annealed after being coiled in line, so that contacted portions of the metal tube can be prevented from sticking together.
  • the first aspect of the invention provides a method for manufacturing a soft metal tube, comprising working step ( 1 ) of working a soft metal plate with hardening of the soft metal plate, forming step ( 2 ) of forming the metal plate worked in the working step ( 1 ) into a metal tube (B), annealing step ( 3 ) to anneal and soften the metal tube (B) that is hardened in the working step ( 1 ) and formed in the forming step ( 2 ), and coiling in-line step ( 4 ) of coiling the metal tube (B) softened in the annealing step ( 3 ) in line.
  • the soft metal plate is hardened by groove working in the working step ( 1 ) and then formed into the metal tube (B) in the forming step ( 2 ). It means that this would just provide only a hardened metal tube.
  • the above metal tube (B) is firstly softened in the annealing step ( 3 ) and then coiled in line in the coiling in-line step ( 4 ). That is, in the annealing step ( 3 ), the metal tube (B) has not been coiled in line yet. Accordingly, a situation can be avoided where contacted portions of the metal tube (B) stick together by annealing and thereby it may not be easy for the coiled tube to be removed.
  • the second aspect of the invention provides the method of the first aspect of the intention, wherein the working step ( 1 ) comprises rolling to harden the metal plate.
  • the metal plate is actually hardened by rolling in the working step ( 1 ), because in general applying rolling to a soft metal plate hardens the metal plate. Therefore, the above-described function of the first aspect of the invention can be achieved actually.
  • the third aspect of the invention provides the method of the first aspect or the second aspect of the invention, wherein the annealing step ( 3 ) comprises step of annealing every portions of the metal tube (B) one by one and continuously while the metal tube (B) is supplied in the length direction, and the coiling in-line step ( 4 ) comprises step of coiling the metal tube (B) in line successively while the metal tube (B) is carried out from the annealing step ( 3 ).
  • every portions of the metal tube (B) is annealed one by one and continuously while supplied in the length direction.
  • the metal tube (B) is coiled in line successively while carried out from the annealing step ( 3 ). Accordingly, a smaller annealing furnace can be adopted, compared with that used in a conventional way where each coil of the metal tube coiled in line is annealed one by one.
  • the annealing of the metal tube (B) is applied in the length direction continuously, and therefore a lower cost can be achieved, compared with a conventional way where applying of annealing is applied intermittently for each coil of the metal tube.
  • the fourth aspect of invention provides the method of any of the first aspect through the third aspect of the invention, wherein the metal tube (B) is carried out in a state where it is coiled in line on a bobbin for carrying out (C), and the metal tube (B) is coiled in line on the bobbin for carrying out (C) in the coiling in-line step ( 4 ).
  • the metal tube (B) for example like a heat transfer tube for a heat exchanger, is carried out in a state where it is coiled in line on a bobbin for carrying out (C), and the metal tube (B) is coiled in line on the bobbin for carrying out (C) in the coiling in-line step ( 4 ) that is after the annealing step ( 3 ). That is, because the annealing step ( 3 ) is finished at this point, a situation where the bobbin for carrying out (C) is heated can be avoided. Therefore, any work of installing the metal tube that is coiled in line to the bobbin (C), which exists in a conventional way, can be omitted.
  • the fifth aspect of the invention provides the method of the fourth aspect of the invention, wherein the bobbin for carrying out (C) comprises a body (C 1 ) on which the metal tube (B) is coiled and a flange (C 2 ) which is attached to at least one end of the body (C 1 ), and the metal tube (B) is coiled in line on the body (C 1 ) and then the flange (C 2 ) is attached to the body (C 1 ) with the metal tube (B) coiled in line thereon in the coiling in-line step ( 4 ).
  • the metal tube (B) in the coiling in-line step ( 4 ), is coiled in line on the body (C 1 ) and then the flange (C 2 ) is attached to the body (C 1 ). Therefore, any work of inserting the body (C 1 ) into the center of the coils of the metal tube (B) coiled in line, which exists in a conventional way, should not be necessary, and so it can provide simple works in the manufacturing method.
  • the sixth aspect of the invention provides the method of any of the first aspect through the fifth aspect of the invention, wherein the metal tube (B) is a heat transfer tube with its inside surface having plural lines of grooves for a heat exchanger and the metal plate is a copper plate, the forming step ( 1 ) comprises step of forming plural lines of grooves on one surface of the copper plate by rolling, and the forming step ( 2 ) comprises step of forming the copper plate into the heat transfer tube (B) for the heat exchanger in such a manner that the grooves are located on an inside surface of the tube.
  • the metal tube (B) is a heat transfer tube with its inside surface having plural lines of grooves for a heat exchanger and the metal plate is a copper plate
  • the forming step ( 1 ) comprises step of forming plural lines of grooves on one surface of the copper plate by rolling
  • the forming step ( 2 ) comprises step of forming the copper plate into the heat transfer tube (B) for the heat exchanger in such a manner that the grooves are located on an inside surface
  • plural lines of grooves are formed on one surface of the soft copper plate by rolling in the working step ( 1 ), and the copper plate is formed in a tube shape in such a manner that the grooves are located in an inside surface thereof in the forming step ( 2 ), and then the heat transfer tube with its inside surface having a groove (B) is provided. Therefore, the heat transfer tube with its inside surface having a groove (B) that should be easy to be removed without sticking because of annealing can be provided.
  • the seventh aspect of the invention provides a manufacturing device that is used for the above-described method for manufacturing a soft metal tube of the first aspect of the invention, as shown in FIG. 2, comprising, working means ( 11 ) for working a soft metal plate with hardening of the soft metal plate, forming means ( 12 ) for forming the metal plate worked in the working means ( 11 ) into a metal tube (B), annealing means ( 13 ) for annealing and softening the metal tube (B) that is hardened in the working means ( 11 ) and formed in the forming means ( 12 ), and coiling in-line means ( 14 ) for coiling the metal tube (B) softened in the annealing means ( 13 ) in line.
  • this device for manufacturing a soft metal tube basically the same function as the first aspect of the invention can be achieved.
  • the eighth aspect of the invention provides the device of the seventh aspect of the invention, wherein the working means ( 11 ) rolls the metal plate accompanying hardening of this metal plate. According to the eighth aspect of the invention, basically the same function as the second aspect of the invention can be achieved.
  • the ninth aspect of the invention provides the device of the seventh aspect or the eighth aspect of the invention, wherein the annealing means ( 13 ) comprises means for annealing every portions of the metal tube (B) one by one and continuously while the metal tube (B) is supplied in the length direction, and the coiling in-line means ( 14 ) comprises means for coiling the metal tube (B) in line successively while the metal tube (B) is carried out from the annealing means ( 13 ).
  • the annealing means ( 13 ) comprises means for annealing every portions of the metal tube (B) one by one and continuously while the metal tube (B) is supplied in the length direction
  • the coiling in-line means ( 14 ) comprises means for coiling the metal tube (B) in line successively while the metal tube (B) is carried out from the annealing means ( 13 ).
  • the ninth aspect of the invention basically the same function as the third aspect of the invention can be achieved.
  • the tenth aspect of the invention provides the device of the ninth aspect of the invention, wherein the annealing means ( 13 ) comprises a heating furnace ( 13 a ), through which the metal tube (B) can pass in the length direction, and a cooling furnace ( 13 b ) coupled to the heating furnace ( 13 a ) at its exit side, through which the metal tube (B) coming out from the heating furnace ( 13 a ) can pass in the length direction, and every portions of the metal tube (B) in the length direction passing through are heated in the heating furnace ( 13 a ) and then cooled in the cooling furnace ( 13 b ), one by one and continuously, respectively.
  • the function of the ninth aspect of the invention can be achieved appropriately.
  • the eleventh aspect of the invention provides the device of any of the seventh aspect through the tenth aspect of the invention, wherein the metal tube (B) is carried out in a state where it is coiled in line on a bobbin for carrying out (C), and the coiling in-line means ( 14 ) coils the metal tube (B) in line on the bobbin for carrying out (C).
  • the metal tube (B) that is annealed by the annealing means ( 13 ) is coiled in on the bobbin for carrying out (C) by the coiling in-line means ( 14 ).
  • the eleventh aspect of the invention basically the same function as the fourth aspect of the invention can be achieved.
  • the twelfth aspect provides the device of any of the seventh aspect through the eleventh aspect of the invention, wherein the metal tube (B) is a heat transfer tube with its inside surface having plural lines of grooves for a heat exchanger and the metal plate is a copper plate, the working means ( 11 ) forms plural lines of grooves on one surface of the copper plate by rolling, and the forming means ( 12 ) forms the copper plate into the heat transfer tube (B) for the heat exchanger in such a manner that the grooves are located on an inside surface of the tube.
  • the twelfth aspect of the invention basically the same function as the sixth aspect of the invention can be achieved.
  • the soft metal plate is worked with hardening thereof and formed in a tube shape, and the metal tube (B) is coiled in line.
  • the metal tube (B) is softened by annealing
  • the metal tube is coiled in line after being annealed, contrary to a conventional way in which the metal tube is annealed after being coiled in line. Therefore, contacted portions of the metal tube (B) can be prevented from sticking together.
  • the work with hardening is the rolling. Therefore, the effect of the first aspect and the seventh aspect of the invention can be achieved actually.
  • the formed metal tube (B) is annealed continuously while supplied in its length direction, and thereby a smaller annealing furnace can be adopted. Therefore, space saving of equipments and cost reduction for installing and operating equipments can be achieved.
  • the metal tube (B) is carried out in a state where it is coiled in line on a bobbin for carrying out (C), and the metal tube (B) is coiled in line on the bobbin for carrying out (C) in the coiling in-line step ( 4 ). Therefore, it can reduce works for installing the metal tube (B) to the bobbin (C).
  • the metal tube (B) is coiled in line on the body of the bobbin (C), in which its flanges are attached to the end of its body. Therefore, any work of inserting the body into the center of the coils of the metal tube (B) coiled in line can be omitted. As a result, it can achieve the effect of the fourth aspect and the eleventh aspect of the invention actually.
  • the metal tube (B) is the heat transfer tube with its inside surface having a groove for the heat exchanger, and this heat transfer tube for the heat exchanger is made from the copper plate. Therefore, the heat transfer tube with its inside surface having a groove that should be easy to be removed from the bobbin for carrying out (C) can be provided.
  • every portions of the metal tube (B) in its length direction are annealed one by one and continuously by the heating furnace ( 13 a ) and the cooling furnace ( 13 b ), through which the tube can pass respectively. Therefore, it can achieve the effect of the third aspect and the ninth aspect of the invention actually.
  • FIG. 1 is a block diagram showing a process of manufacturing a heat transfer tube in an embodiment of the present invention
  • FIG. 2 is a block diagram showing an entire constitution of a manufacturing device
  • FIG. 3 is a schematic illustration showing respective steps in a manufacturing process from annealing step to coiling in-line step;
  • FIG. 4 is a diagram equivalent to the FIG. 1, showing a conventional process of manufacturing a heat transfer tube
  • FIG. 5 is a diagram equivalent to FIG. 2, showing an entire constitution of a conventional manufacturing device.
  • FIG. 6 is an illustration equivalent to FIG. 3, showing respective steps in a conventional manufacturing process from annealing step through coiling in-line step to installment step.
  • FIG. 2 shows schematically an entire constitution of a manufacturing device of a heat transfer tube in the embodiment of the present invention.
  • This device is used for manufacturing a heat exchanger from a ribbon-shaped soft copper plate of about 0.5 mm in thickness and about 30 mm in width (mentioned in Prior Art section).
  • the manufacturing device is used for manufacturing a heat transfer tube (B) with its inside surface having a groove, having a thickness of several mm (for example, 7-8 mm).
  • the manufacturing device basically includes a groove working mechanism ( 11 ) that forms plural lines of grooves by applying rolling to the soft copper plate, a forming mechanism ( 12 ) that forms the copper plate worked by the groove working mechanism ( 11 ) into the heat transfer tube (B), an annealing mechanism ( 13 ) that anneals and softens the heat transfer tube (B) which is hardened by the groove working mechanism ( 11 ) and formed by the forming mechanism ( 12 ), and a coiling in-line mechanism ( 14 ) that coils the beat transfer tube (B) softened by the annealing mechanism ( 13 ) regularly and in line.
  • the copper plate When supplied to the manufacturing device, the copper plate is supplied in a state where it is coiled on a bobbin for carrying in.
  • the beat transfer tube (B) formed by the manufacturing device is carried out in a state where it is coiled regularly and in line on a wooden bobbin for carrying out (C) having a cylindrical body (C 1 ) and a pair of flanges (C 2 , C 2 ) detachably attached to the both ends of the body (C 1 ).
  • the bobbin for carrying out (C) has its size in which an outside diameter of the body (C 1 ) is approximately 600 mm, a distance between the both flanges (C 2 , C 2 ) is approximately 400 mm, and a diameter of each flange (C 2 ) is approximately 1100 mm.
  • the groove working mechanism ( 11 ) is coupled to an un-coiler that removes the coiled copper plate on the bobbin carried in, which is not illustrated.
  • the groove working mechanism ( 11 ) is constituted in such a manner that an emboss roll with a certain outer figure is pressed against the copper plate removed by the un-coiler so as to form the groove described above.
  • the forming mechanism ( 12 ) is constituted in such a manner that the copper plate is formed in a tube shape by pressing the copper plate against a forming roll mold, both-side edges thereof in the width direction are attached to one another and welded together by a welding machine, and then it is narrowed down to a certain diameter, which in not illustrated. In this way, the heat transfer tube (B) is formed by the forming mechanism ( 12 ).
  • the annealing mechanism ( 13 ) includes a high-frequency heating furnace ( 13 a ), through which the heat transfer tube (B) can pass in the length direction thereof, and a cooling furnace ( 13 b ) coupled to the high-frequency heating furnace ( 13 a ) at its exit side, through which the heat transfer tube (B) coming out from the high-frequency heating furnace ( 13 a ) can pass in the length direction thereof.
  • the heat transfer tube (B) is supplied in the length direction so as to pass through the high-frequency heating furnace ( 13 a ) and cooling furnace ( 13 b ) in order, so that every portions of the heat transfer tube (B) is heated in the high-frequency heating furnace ( 13 a ) and then cooled in the cooling furnace ( 13 b ), one by one and continuously, respectively.
  • the coiling in-line mechanism ( 14 ) includes a rotational axis to which the body (C 1 ) of the bobbin (C) is attached detachably, and a coiling machine ( 14 a ) rotating the body (C 1 ) attached to the rotational axis in the coiling direction of the heat transfer tube (B) on the body (C 1 ). That is, in this embodiment, the heat transfer tube (B) is coiled in line directly on the bobbin for carrying out (C).
  • a process of manufacturing the heat transfer tube by the manufacturing device comprising the groove working mechanism ( 11 ), the forming mechanism ( 12 ), the annealing mechanism ( 13 ) and the coiling in-line mechanism ( 14 ) will be described referring to FIG. 1.
  • the process consists of groove working step ( 1 ) by the groove working mechanism ( 11 ), forming step ( 2 ) by the forming mechanism ( 12 ), annealing step ( 3 ) by the annealing mechanism ( 13 ) and coiling in-line step ( 4 ) by the coiling in-line mechanism ( 14 ).
  • the groove working step ( 1 ) the copper plate carried in is removed from the bobbin by the un-coiler, and the emboss roll is pressed against one of the surfaces of the copper plate to work grooves.
  • the soft copper plate is hardened from HV(0.5) 60-68 to HV(0.5) 100-130, and its elongation percentage decreases from more than 40% to less than 35%.
  • the copper plate is formed in a tube shape gradually by pressing it against a roll mold, with grooves located on its inside surface, and its attached joint portions are welded together, and then it is narrowed down to a certain diameter.
  • the heat transfer tube (B) formed in the forming step ( 2 ) is once coiled roughly with an appropriate diameter in a basket.
  • the heat transfer tube (B) in the basket is supplied in the length direction at a certain speed (for example approximately 10-200 m/minute), and every portions of that is heated at a certain temperature (for example 700° C.) in the high-frequency heating furnace ( 13 a ) and then cooled down by a water to a certain temperature (for example 30-40° C.) in the cooling furnace ( 13 b ), one by one and continuously, respectively. Accordingly, the heat transfer tube (B) that has been hardened is softened and comes back to the original state with its elongation percentage of more than 40%.
  • a length of heating area where the heat transfer tube (B) is heated passing through the high-frequency heating furnace ( 13 a ) is set to approximately 1 m, and every portions of the heat transfer tube (B) in the length direction are heated at a certain temperature for a period of, for example 0.1-0.2 seconds.
  • the heat transfer tube (B) annealed in the annealing step ( 3 ) is coiled directly on the body (C 1 ). Accordingly, as shown in FIG. 3( b ), the heat transfer tube (B) that is coiled in line on the body (C 1 ) can be provided.
  • FIG. 3( a ) the heat transfer tube (B) that is coiled in line on the body (C 1 ) can be provided.
  • a pair of flanges (C 2 , C 2 ) are attached to the both ends of the body (C 1 ) on which the heat transfer tube (B) is coiled in line, and accordingly the heat transfer tube (B) that is coiled in line on the bobbin for carrying out (C) can be provided.
  • one flange (C 2 ) may be attached to one end of the body (C 1 ) at need.
  • grooves are formed on the soft copper plate by rolling with hardening, and the copper plate is formed in a tube shape, and then the heat transfer tube (B) with its inside surface having groove is coiled in line.
  • the hardened heat transfer tube (B) is annealed and softened, the tube (B) is coiled in line after being annealed, contrary to the conventional way in which the tube is annealed and softened after being coiled in line. Therefore, a situation can be avoided where contacted portions of the heat transfer tube (B) stick together by annealing and accordingly it may not be easy for the coiled tube to be removed.
  • the annealed heat transfer tube (B) is coiled in line on the body (C 1 ) of the bobbin for carrying out (C). Therefore, works of installing the heat transfer tube (B) to the bobbin for carrying out (C) can be simplified so as to be just a work of installing the flange (C 2 ) to the body (C 1 ).
  • the heat transfer tube (B) with its inside surface having a groove for a heat exchanger is manufactured by using a soft metal plate made of copper alloy is described.
  • the present invention is not limited to this particular material, and any other materials may be adopted.
  • the method and the device for manufacturing a soft metal tube of the present invention are useful in manufacturing a soft metal tube which working with hardening is applied to and are coiled in line on, especially in manufacturing a soft metal tube with its inside surface having a groove for a heat exchanger.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Metal Extraction Processes (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
US10/297,381 2000-06-09 2001-06-07 Device and method for manufacturing soft metal tube Abandoned US20030183311A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-173522 2000-06-09
JP2000173522A JP2001347313A (ja) 2000-06-09 2000-06-09 軟質金属管の製造方法及び製造装置

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US20030183311A1 true US20030183311A1 (en) 2003-10-02

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US10/297,381 Abandoned US20030183311A1 (en) 2000-06-09 2001-06-07 Device and method for manufacturing soft metal tube

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US (1) US20030183311A1 (de)
EP (1) EP1293269B1 (de)
JP (1) JP2001347313A (de)
KR (1) KR100693887B1 (de)
CN (1) CN1214873C (de)
AU (1) AU2001262715A1 (de)
DE (1) DE60119321T2 (de)
WO (1) WO2001094044A1 (de)

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JP2009180453A (ja) * 2008-01-31 2009-08-13 Hitachi Cable Ltd レベルワウンドコイル、及びコルゲート伝熱管の製造方法
GB2471495B (en) 2009-07-01 2014-06-04 Mrb Schumag Ltd A coil winding device
CN101988414A (zh) * 2010-11-12 2011-03-23 无锡市凯龙汽车设备制造有限公司 一种汽车尾气消声加热供暖装置
CN104708292A (zh) * 2015-03-02 2015-06-17 金龙精密铜管集团股份有限公司 传热管的加工方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708354A (en) * 1971-06-09 1973-01-02 Anaconda American Brass Co Method and apparatus for measuring and controlling the continuous annealing of a long length of metal tubing

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Publication number Priority date Publication date Assignee Title
JPS62188727A (ja) * 1986-02-13 1987-08-18 Kobe Steel Ltd 長尺金属管の連続焼鈍方法
JPH043684Y2 (de) * 1986-03-19 1992-02-05
JPH0929333A (ja) * 1995-07-19 1997-02-04 Furukawa Electric Co Ltd:The レベルワウンドコイルの梱包方法
JPH09155540A (ja) * 1995-12-08 1997-06-17 Mitsubishi Shindoh Co Ltd 内面溝付伝熱管の製造方法
JPH1054686A (ja) * 1996-08-08 1998-02-24 Mitsubishi Shindoh Co Ltd 内面溝付伝熱管およびその製造用ロール

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708354A (en) * 1971-06-09 1973-01-02 Anaconda American Brass Co Method and apparatus for measuring and controlling the continuous annealing of a long length of metal tubing

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DE60119321T2 (de) 2007-02-22
JP2001347313A (ja) 2001-12-18
KR20030010670A (ko) 2003-02-05
EP1293269B1 (de) 2006-05-03
KR100693887B1 (ko) 2007-03-12
EP1293269A4 (de) 2005-03-16
EP1293269A1 (de) 2003-03-19
CN1214873C (zh) 2005-08-17
AU2001262715A1 (en) 2001-12-17
DE60119321D1 (de) 2006-06-08
WO2001094044A1 (fr) 2001-12-13
CN1433343A (zh) 2003-07-30

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