US20020062674A1 - Work roll for rolling device - Google Patents
Work roll for rolling device Download PDFInfo
- Publication number
- US20020062674A1 US20020062674A1 US09/646,607 US64660700A US2002062674A1 US 20020062674 A1 US20020062674 A1 US 20020062674A1 US 64660700 A US64660700 A US 64660700A US 2002062674 A1 US2002062674 A1 US 2002062674A1
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- United States
- Prior art keywords
- disks
- work roll
- rolling apparatus
- upright walls
- work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 238000005096 rolling process Methods 0.000 title claims abstract description 37
- 230000002093 peripheral effect Effects 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000007493 shaping process Methods 0.000 description 19
- 238000005219 brazing Methods 0.000 description 13
- 230000003014 reinforcing effect Effects 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 238000003780 insertion Methods 0.000 description 9
- 230000037431 insertion Effects 0.000 description 9
- 238000005498 polishing Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910001315 Tool steel Inorganic materials 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009760 electrical discharge machining Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/227—Surface roughening or texturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
Definitions
- the present invention relates to work rolls for use in rolling apparatus for producing articles of deformed cross section, such as flat heat exchange tube component members, heat sinks and lead frames, from a metal blank sheet.
- component members of flat heat exchange tubes which comprise a flat plate portion and a plurality of upright walls formed on one surface of the plate portion integrally therewith and arranged as spaced apart from one another are produced by passing a metal blank sheet through a rolling apparatus wherein one of work rolls has a plurality of upright wall shaping annular grooves formed in the peripheral surface of the roll over the entire circumference thereof as is already known (see JP-A No. 182928/1997).
- a work roll for rolling apparatus is one comprising a hollow cylindrical body which is integrally formed in its entirety and has a plurality of upright wall shaping annular grooves formed in its outer peripheral surface.
- the annular grooves are formed by subjecting the outer peripheral surface of the integrally formed cylindrical body to cutting, grinding and electrical discharge machining operations, and subsequently polishing the inner peripheral surfaces of the annular grooved portions to smooth finishes and obtain the conventional work roll.
- the conventional work roll described has the following problems.
- the upright walls of the component member to be produced for the flat heat exchange tube have a small thickness and a great height
- the upright wall shaping annular grooves have a small width and a great depth
- difficulties are then encountered in forming the annular grooves by cutting, grinding and electrical discharge machining and also in finishing the inner peripheral surfaces of the annular grooved portions by polishing.
- the fabrication of the entire work roll requires cumbersome work, a prolonged period and an increased cost.
- the inner peripheral surfaces defining the annular grooves are difficult to finish by polishing, the grooved inner peripheral surfaces are finished with low accuracy, giving an impaired surface quality to the heat exchange component member obtained.
- the work roll becomes locally worn or damaged, there arises a need to produce the entire work roll anew for replacement, consequently necessitating a prolonged period of time and an increased cost for the production and replacement of the work roll.
- An object of the present invention is to overcome the foregoing problems and to provide a work roll which is easier to make and which is given higher surface finish accuracy than conventionally for use in rolling apparatus.
- the present invention provides a work roll for rolling apparatus which comprises different kinds of disks having different diameters and arranged on an axis into juxtaposed layers as secured to one another, the disks of each kind being used in a specified number, each of the disks having an outer peripheral surface serving as a working surface.
- the work roll can be fabricated by making the individual disks, arranging the disks into juxtaposed layers and securing the disks to one another. Since the individual disks can be produced more easily than the conventional work roll, the roll can be produced within a shortened period of time at a lower cost. Since the peripheral surfaces of the individual disks can be finished by polishing easily, the surfaces can be finished with improved accuracy to give an excellent surface quality to the product obtained. Further even if one of the disks becomes locally worn or damaged, the worn or damaged disk only needs to be replaced by a corresponding disk which alone is to be prepared anew. This shortens the time required for the replacement and results in a reduced cost.
- the work roll of the invention is used in a rolling apparatus for producing an article having a deformed cross section and comprising a plate portion, and a plurality of upright walls formed on one of opposite surfaces of the plate portion integrally therewith and arranged as spaced apart from one another.
- large disks are arranged at respective portions not forming the upright walls, and small disks smaller than the large disks in radius by an amount corresponding to the height of the upright walls are arranged at respective portions for forming the upright walls.
- the outer peripheral surfaces of the small disks are formed with projections for shaping the cutouts.
- the small disks can be machined more easily than when the bottom surfaces of the annular grooved portions of the cylindrical body are machined to form the cutout shaping projections in producing the conventional work roll.
- the peripheral surfaces of the projections can be finished also easily.
- the work of producing the work roll in its entirety is not very cumbersome as compared with the case wherein no projections are formed on the small disks, consequently necessitating only a slightly longer period for the fabrication of the work roll and a slightly increased production cost. Since the peripheral surfaces of the projections are easy to finish, the finished surfaces have improved accuracy to give an excellent quality to the interior surfaces defining the cutouts.
- the present invention provides a rolling apparatus which comprises a central work roll and a plurality of planetary work rolls arranged around the central work roll and spaced apart cicumferentially thereof, at least one of the central work roll and the planetary work rolls being one of the work rolls of the invention described.
- the invention further provides a rolling apparatus which comprises two work rolls in a pair, at least one of the two work rolls being one of the work rolls of the invention described.
- FIG. 1 is a diagram showing a rolling plant for producing lower component members of flat tubes for use in heat exchangers, the plant comprising a rolling apparatus wherein a work roll of the invention is used as its central roll.
- FIG. 2 is an enlarged view in section taken along the line II-II in FIG. 1.
- FIG. 3 is a front view partly broken away and showing the central work roll of the rolling apparatus.
- FIG. 4 is a fragmentary enlarged perspective view showing the central work roll of the rolling apparatus, with the peripheral surface of the roll developed in a plane.
- FIG. 5 is an enlarged view partly broken away and in section taken along the line V-V in FIG. 4.
- FIG. 6 is a view in section taken along the line VI-VI in FIG. 5.
- FIG. 7 is a view in cross section of the heat exchanger flat tube comprising the lower component member to be produced by the rolling plant shown in FIG. 1.
- FIG. 8 is an enlarged view in section taken along the line VIII-VIII in FIG. 7.
- FIG. 9 is a fragmentary perspective view showing how to combine the lower component member and an upper component member into the heat exchanger flat tube.
- aluminum includes aluminum alloys in addition to pure aluminum.
- FIG. 1 shows a rolling plant in its entirety which includes a rolling apparatus comprising a work roll of the present invention as its central work roll
- FIGS. 2 to 6 show the work roll embodying the invention for use in the rolling apparatus
- FIGS. 7 to 9 show a lower component member of deformed cross section to be produced to provide heat exchanger flat tubes.
- FIGS. 7 and 8 show a flat heat exchange tube 50 , which comprises flat upper and lower walls 51 , 52 , left and right side walls 53 , 54 of double structure interconnecting the upper and lower walls 51 , 52 at the left and right side edges thereof, respectively, and a plurality of reinforcing walls 55 interconnecting the upper and lower walls 51 , 52 , extending longitudinally of the tube and spaced apart from one another by a predetermined distance, as arranged between the opposite side walls 53 , 54 .
- the tube has parallel fluid channels 56 in its interior.
- a low ridge 57 extending in the longitudinal direction for giving an increased heat transfer area is provided in the form of an upward protrusion on the inner surface of the lower wall 52 integrally therewith.
- Communication holes 58 are formed in the reinforcing walls 55 for holding the parallel fluid channels 56 in communication with one another. When seen from above, the communication holes 58 are in a staggered arrangement. When the tube has the communication holes 58 , fluid portions flowing through the respective parallel channels 56 flow widthwise of the heat exchange tube 50 through the holes 58 , spreading over all the fluid channels 56 to become mixed together and eliminating temperature differences in the fluid between the channels 56 . This results in an improved heat exchange efficiency.
- the flat heat exchange tube 50 comprises a lower component member 1 of aluminum providing the lower wall 52 , inner portions 53 a, 54 a of the opposite side walls 53 , 54 and the reinforcing walls 55 ; and an upper component member 8 of aluminum providing the upper wall 51 and outer portions 53 b, 54 b of the opposite side walls 53 , 54 .
- the lower component member 1 is produced by the rolling apparatus incorporating the work roll of the invention.
- the lower component member 1 comprises a flat rectangular lower wall forming portion 2 (plate portion), side wall forming portions 3 (upright walls) extending upward from respective opposite side edges of the lower wall forming portion 2 integrally therewith, and a plurality of reinforcing wall forming portions 4 (upright walls) upstanding from the lower wall forming portion 2 integrally therewith, spaced apart from one another as arranged between the side wall forming portions 3 on the portion 2 and extending longitudinally of the portion 2 . Ridges 57 each in the form of an upward protrusion are formed on the upper surface of the lower wall forming portion 2 integrally therewith.
- Trapezoidal cutouts 6 are formed in the upper edges of reinforcing forming walls 4 in a staggered arrangement when seen from above and spaced apart by a predetermined distance longitudinally thereof.
- the lower wall forming portion 2 of the lower component member 1 is formed with a slope 7 slanting outwardly upward at each of opposite side edges of its lower surface.
- the side wall forming portions 3 of the lower component member 1 have the same height as the reinforcing wall forming portions 4 .
- the lower component member 1 is made from an aluminum brazing sheet having a brazing material layer (not shown) on its outer surface, i.e., on the lower surface of the lower wall forming portion 2 and on the outer surfaces of the side wall forming portions 3 .
- the upper component member 8 comprises a flat rectangular upper wall forming portion 81 , and side wall forming portions 82 extending downward from opposite side edges of the upper wall forming portion 81 integrally therewith.
- the upper component member 8 is made from an aluminum brazing sheet having a brazing material layer (not shown) on its opposite surfaces by roll forming.
- the upper wall forming portion 81 and the side wall forming portions 82 have the brazing material layer (not shown) on their opposite surfaces.
- the flat heat exchange tube 50 is prepared by fitting the upper component member 8 over the lower component member 1 as shown in FIG. 9, with their side wall forming portions 82 lapping over the respective side wall forming portions 3 , inwardly bending the lower ends of the side wall forming portions 82 into intimate contact with the slops 7 to temporarily hold the two component members 1 , 8 together and brazing the two component members 1 , 8 .
- the communication holes 58 are formed by closing the openings of the cutouts 6 in the reinforcing wall forming portions 4 of the lower component member 1 with the upper wall forming portion 81 of the upper component member 8 .
- the rolling plant for producing the lower component member 1 comprises an uncoiler 11 having wound up thereon an aluminum brazing sheet 10 (metal blank sheet) formed with a brazing material layer on one side thereof so that the brazing material layer is positioned outside, a preliminary rolling mill 12 , a finishing rolling apparatus 13 and transport rolls 14 .
- the aluminum brazing sheet 10 on the uncoiler 11 is paid out from the uncoiler 11 , fed to and passed through the preliminary rolling mill 12 , and thereafter fed to the rolling apparatus 13 and thereby rolled for finishing, whereby the lower component member 1 is produced.
- the preliminary rolling mill 12 forms on the aluminum brazing sheet 10 ridges corresponding to the side wall forming portions 3 and the reinforcing wall forming portions 4 .
- the rolling apparatus 13 comprises a central work roll 15 , a plurality of planetary work rolls 16 arranged around the central work roll 15 and equidistantly spaced apart circumferentially of the roll 15 , and trapezoidal guide shoes 17 arranged between the adjacent planetary work rolls 16 .
- the central work roll 15 is a work roll of the invention.
- the central work roll 15 comprises large and small two kinds of disks 20 A, 20 B, 21 A, 21 B arranged alternately on an axis into juxtaposed layers and clamped between a pair of flanges 22 A, 22 B at left and right opposite sides of the arrangement and secured to one another.
- the disks 20 A, 20 B, 21 A, 21 B are made from die steel, high-speed tool steel, cemented carbide or the like.
- the large disks 20 A, 20 B are arranged at the respective portions not forming the side wall forming portions 3 and the reinforcing wall forming portions 4 on the lower component member.
- the small disks 21 A, 21 B are arranged at the respective portions for forming the side wall forming portions 3 and the reinforcing wall forming portions 4 on the lower component member 1 . Accordingly, annular grooves 23 for shaping the side wall forming portions are defined by the large disks 20 A at the left and right ends, the small disks 21 A at the left and right ends and the flanges 22 A, 22 B. An annular groove 24 for shaping the reinforcing wall forming portion is defined by each pair of adjacent large disks 20 A, 20 B and the small disk 21 B therebetween.
- Each of the large disks 20 B other than the large disks 20 A at the opposite ends is formed in its outer peripheral surface with a ridge shaping annular recess 25 over the entire circumference thereof.
- the radius of the small disks 21 A, 21 B is smaller than the radius of the large disks 20 A, 20 B by an amount corresponding to the height of the side wall forming portions 3 and the reinforcing wall forming portions 4 .
- the small disks 21 B other than the small disk 20 A at the opposite ends are each formed in the outer peripheral surface thereof with a plurality of cutout shaping projections 26 arranged at a spacing circumferentially thereof. Since the cutouts 6 are in a staggered arrangement, one of the adjacent small disks 21 B has its projections 26 arranged as circumferentially shifted from those of the other.
- Opposite surfaces of the disks 20 A, 20 B, 21 A, 21 B and the surfaces of the flanges 22 A, 22 B axially inward of the work roll 15 are each in the form of a vertical surface, and each pair of adjacent disks 20 A, 20 B, 21 A, 21 B, as well as each of the flanges 22 A, 22 B and the disk 21 A, are in intimate contact with each other.
- the outer peripheral portion of each of the large disks 20 A, 20 B, 21 A, 21 B projecting radially outward beyond the projections 26 on the small disk 21 B is tapered toward the outer peripheral edge with a gradually reducing thickness so as to render the lower component member 1 as formed easily removable from the work roll 15 .
- a drive shaft insertion bore extends through both flanges 22 A, 22 B, all the large disks 20 A, 20 B and all the small disks 21 A, 21 B centrally thereof. Further a key groove forming cutout (not shown) is formed in a portion of the inner periphery of each of the flanges 22 A, 22 B, the large disks 20 A, 20 B and the small disks 21 A, 21 B which defines the shaft insertion bore.
- a plurality of bolt insertion bores 27 extend through the left flange 22 A, all the large disks 20 A, 20 B and all the small disks 21 A, 21 B and are arranged on the circumference of a portion of each of these disks around the shaft insertion bore and spaced apart circumferentially.
- a plurality of internally threaded bores 28 are formed in the right flange 22 B on the circumference of a portion thereof around the shaft insertion bore and spaced apart circumferentially. The bolt insertion bores in all the large disks 20 A, 20 B and all the small disks 21 A, 21 B are not shown.
- the large disks 20 A, 20 B and the small disks 21 A at the opposite ends are prepared in the following manner.
- Metal plates of die steel, high-speed tool steel, cemented carbide or the like are machined by blanking or lathing to obtain disks having specified outside diameters and a drive shaft insertion bore.
- Each disk is then heat-treated and worked by electrical discharge wire cutting to shape a key groove forming cutout in the bored portion and shape bolt insertion bores.
- the inner periphery of the disk defining the drive shaft bore is finished by a jig grinding machine.
- the disk is thereafter finished over opposite surfaces by surface polishing and has its outer peripheral surface finished by cylindrical polishing.
- Each of the disks for the large disks 20 A, 20 B is then slightly tapered by profile grinding at its outer peripheral portion.
- Each of the disks for the large disks 20 B other than the large disks 20 A at the opposite ends is worked on its outer peripheral surface by profile grinding to form a ridge shaping annular recess 25 . In this way, the large disks 20 A, 20 B and the small disks 21 A at the opposite ends are produced.
- the small disks 21 B other than the small end disks 21 A are produced in the following manner.
- a metal plate of die steel, high-speed tool steel, cemented carbide or the like is machined by blanking to obtain disks having a specified outside diameter and a drive shaft insertion bore. These disks are greater in radius than the disks blanked out for preparing the small end disks 21 A by an amount corresponding to the height of the cutout shaping projections 26 .
- the subsequent sequence of steps up to the finishing work by surface polishing and cylindrical polishing is the same as is the case with the preparation of the large disks 20 A, 20 B and the small end disks 21 A.
- the recessed portions to be present between the adjacent cutout shaping projections 26 are then formed. Finally the inner faces of the recessed portions are finished by polishing. In this way, the small disks 21 B are produced.
- each small end disk 21 A and the large end disk 20 A are separate members according to the construction described, the outer periphery of the small end disk 21 A has no cutout shaping projections and is in the form of a cylindrical face, so that the small end disk may be made integral with the large end disk 20 A.
- the peripheral surface of the planetary work roll 16 has a slope shaping portion 30 formed at each of its axial opposite ends and having a diameter increasing axially outward.
- the planetary work rolls 16 are coupled to the central work roll 15 by unillustrated gear means, such that the rotation of the central work roll 15 rotates all the planetary work rolls 16 at the same peripheral speed as the central work roll 15 .
- each planetary work roll 16 may be provided with drive means for rotating the work roll 16 at the same peripheral speed as the central work roll 15 .
- the work roll of the invention is used as the central work roll 15 according to the foregoing embodiment, whereas work rolls of the invention may alternatively be used as planetary work rolls 16 .
- the article of deformed cross section to be produced is a lower component member which has upright walls on only one surface of a plate portion for use in flat heat exchangers, so that the annular grooves 23 , 24 for shaping the upright walls are formed only in the central work roll.
- the planetary work rolls 16 may also be formed with annular grooves for shaping upright walls. In this case, work rolls of the invention are used as the planetary work rolls 16 .
- a so-called satellite rolling apparatus comprising a central work roll and a plurality of planetary work rolls arranged around the central work roll
- the work roll of the invention is usable also for usual rolling apparatus which comprise two work rolls in a pair to serve as the work roll.
- the work roll of the invention formed with annular grooves for forming the upright walls is used as one of the pair of work rolls.
- work rolls of the invention each having annular grooves for shaping the upright walls are used as the respective work rolls of the pair.
- the work roll of the present invention for rolling apparatus is suitable as a work roll for use in rolling apparatus for producing articles of deformed cross section, such as flat heat exchange tube component members, heat sinks and lead frames, from a metal blank sheet.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Metal Rolling (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Formation And Processing Of Food Products (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
A work roll for use in rolling apparatus for producing from a metal blank sheet articles having a deformed cross section and comprising, for example, a plate portion, and a plurality of upright walls formed on one surface of the plate portion integrally therewith and arranged as spaced apart from one another, such as flat heat exchange tube component members, heat sinks and lead frames. The work roll assures more simplified production work and provides surface finishes with higher accuracy than conventionally. The work roll comprises different kinds of disks having different diameters and arranged alternately on an axis into juxtaposed layers as secured to one another. Large disks 20A, 20B, are arranged at respective portions not forming the upright walls, and small disks 21A, 21B smaller than the large disks 20A, 20B in radius by an amount corresponding to the height of the upright walls are arranged at respective portions for forming the upright walls. Each of the disks 20A, 20B, 21A, 21B has an outer peripheral surface serving as a working surface.
Description
- The present invention relates to work rolls for use in rolling apparatus for producing articles of deformed cross section, such as flat heat exchange tube component members, heat sinks and lead frames, from a metal blank sheet.
- For example, component members of flat heat exchange tubes which comprise a flat plate portion and a plurality of upright walls formed on one surface of the plate portion integrally therewith and arranged as spaced apart from one another are produced by passing a metal blank sheet through a rolling apparatus wherein one of work rolls has a plurality of upright wall shaping annular grooves formed in the peripheral surface of the roll over the entire circumference thereof as is already known (see JP-A No. 182928/1997).
- Conventionally used as such a work roll for rolling apparatus is one comprising a hollow cylindrical body which is integrally formed in its entirety and has a plurality of upright wall shaping annular grooves formed in its outer peripheral surface. The annular grooves are formed by subjecting the outer peripheral surface of the integrally formed cylindrical body to cutting, grinding and electrical discharge machining operations, and subsequently polishing the inner peripheral surfaces of the annular grooved portions to smooth finishes and obtain the conventional work roll.
- However, the conventional work roll described has the following problems. In the case where the upright walls of the component member to be produced for the flat heat exchange tube have a small thickness and a great height, the upright wall shaping annular grooves have a small width and a great depth, whereas difficulties are then encountered in forming the annular grooves by cutting, grinding and electrical discharge machining and also in finishing the inner peripheral surfaces of the annular grooved portions by polishing. Accordingly, the fabrication of the entire work roll requires cumbersome work, a prolonged period and an increased cost. Moreover, since the inner peripheral surfaces defining the annular grooves are difficult to finish by polishing, the grooved inner peripheral surfaces are finished with low accuracy, giving an impaired surface quality to the heat exchange component member obtained. Further if the work roll becomes locally worn or damaged, there arises a need to produce the entire work roll anew for replacement, consequently necessitating a prolonged period of time and an increased cost for the production and replacement of the work roll.
- Especially in the case where it is required to form cutouts in the upper edges of the upright walls of the heat exchange tube component member to be produced, there is a need to form cutout shaping projections on the bottom surfaces of the annular grooved portions of the work roll. This presents difficulties in machining the grooved portions and finishing the peripheral surfaces of the projections, necessitating more cumbersome work for producing the work roll in its entirety, a further extended period for the production and a higher production cost. Additionally, the projection surfaces will be finished with lower accuracy to give an impaired quality to the cutout surfaces.
- An object of the present invention is to overcome the foregoing problems and to provide a work roll which is easier to make and which is given higher surface finish accuracy than conventionally for use in rolling apparatus.
- The present invention provides a work roll for rolling apparatus which comprises different kinds of disks having different diameters and arranged on an axis into juxtaposed layers as secured to one another, the disks of each kind being used in a specified number, each of the disks having an outer peripheral surface serving as a working surface.
- When thus constructed, the work roll can be fabricated by making the individual disks, arranging the disks into juxtaposed layers and securing the disks to one another. Since the individual disks can be produced more easily than the conventional work roll, the roll can be produced within a shortened period of time at a lower cost. Since the peripheral surfaces of the individual disks can be finished by polishing easily, the surfaces can be finished with improved accuracy to give an excellent surface quality to the product obtained. Further even if one of the disks becomes locally worn or damaged, the worn or damaged disk only needs to be replaced by a corresponding disk which alone is to be prepared anew. This shortens the time required for the replacement and results in a reduced cost.
- The work roll of the invention is used in a rolling apparatus for producing an article having a deformed cross section and comprising a plate portion, and a plurality of upright walls formed on one of opposite surfaces of the plate portion integrally therewith and arranged as spaced apart from one another. In this case, large disks are arranged at respective portions not forming the upright walls, and small disks smaller than the large disks in radius by an amount corresponding to the height of the upright walls are arranged at respective portions for forming the upright walls.
- When the article of deformed cross section to be produced and comprising a plate portion, and a plurality of upright walls formed on one of opposite surfaces of the plate portion integrally therewith and arranged as spaced apart from one another must be formed with cutouts in the upper edges of the upright walls, the outer peripheral surfaces of the small disks are formed with projections for shaping the cutouts. To form the projections, the small disks can be machined more easily than when the bottom surfaces of the annular grooved portions of the cylindrical body are machined to form the cutout shaping projections in producing the conventional work roll. Moreover, the peripheral surfaces of the projections can be finished also easily. Accordingly the work of producing the work roll in its entirety is not very cumbersome as compared with the case wherein no projections are formed on the small disks, consequently necessitating only a slightly longer period for the fabrication of the work roll and a slightly increased production cost. Since the peripheral surfaces of the projections are easy to finish, the finished surfaces have improved accuracy to give an excellent quality to the interior surfaces defining the cutouts.
- The present invention provides a rolling apparatus which comprises a central work roll and a plurality of planetary work rolls arranged around the central work roll and spaced apart cicumferentially thereof, at least one of the central work roll and the planetary work rolls being one of the work rolls of the invention described.
- The invention further provides a rolling apparatus which comprises two work rolls in a pair, at least one of the two work rolls being one of the work rolls of the invention described.
- FIG. 1 is a diagram showing a rolling plant for producing lower component members of flat tubes for use in heat exchangers, the plant comprising a rolling apparatus wherein a work roll of the invention is used as its central roll.
- FIG. 2 is an enlarged view in section taken along the line II-II in FIG. 1.
- FIG. 3 is a front view partly broken away and showing the central work roll of the rolling apparatus.
- FIG. 4 is a fragmentary enlarged perspective view showing the central work roll of the rolling apparatus, with the peripheral surface of the roll developed in a plane.
- FIG. 5 is an enlarged view partly broken away and in section taken along the line V-V in FIG. 4.
- FIG. 6 is a view in section taken along the line VI-VI in FIG. 5.
- FIG. 7 is a view in cross section of the heat exchanger flat tube comprising the lower component member to be produced by the rolling plant shown in FIG. 1.
- FIG. 8 is an enlarged view in section taken along the line VIII-VIII in FIG. 7.
- FIG. 9 is a fragmentary perspective view showing how to combine the lower component member and an upper component member into the heat exchanger flat tube.
- The best mode of carrying out the invention will be described below with reference to the drawings.
- In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
- FIG. 1 shows a rolling plant in its entirety which includes a rolling apparatus comprising a work roll of the present invention as its central work roll, FIGS.2 to 6 show the work roll embodying the invention for use in the rolling apparatus, and FIGS. 7 to 9 show a lower component member of deformed cross section to be produced to provide heat exchanger flat tubes.
- FIGS. 7 and 8 show a flat
heat exchange tube 50, which comprises flat upper andlower walls right side walls 53, 54 of double structure interconnecting the upper andlower walls walls 55 interconnecting the upper andlower walls opposite side walls 53, 54. The tube hasparallel fluid channels 56 in its interior. Between each pair of adjacentreinforcing walls 55, alow ridge 57 extending in the longitudinal direction for giving an increased heat transfer area is provided in the form of an upward protrusion on the inner surface of thelower wall 52 integrally therewith.Communication holes 58 are formed in the reinforcingwalls 55 for holding theparallel fluid channels 56 in communication with one another. When seen from above, thecommunication holes 58 are in a staggered arrangement. When the tube has thecommunication holes 58, fluid portions flowing through the respectiveparallel channels 56 flow widthwise of theheat exchange tube 50 through theholes 58, spreading over all thefluid channels 56 to become mixed together and eliminating temperature differences in the fluid between thechannels 56. This results in an improved heat exchange efficiency. - The flat
heat exchange tube 50 comprises alower component member 1 of aluminum providing thelower wall 52,inner portions opposite side walls 53, 54 and the reinforcingwalls 55; and anupper component member 8 of aluminum providing theupper wall 51 andouter portions opposite side walls 53, 54. Thelower component member 1 is produced by the rolling apparatus incorporating the work roll of the invention. - With reference to FIGS.7 to 9, the
lower component member 1 comprises a flat rectangular lower wall forming portion 2 (plate portion), side wall forming portions 3 (upright walls) extending upward from respective opposite side edges of the lowerwall forming portion 2 integrally therewith, and a plurality of reinforcing wall forming portions 4 (upright walls) upstanding from the lowerwall forming portion 2 integrally therewith, spaced apart from one another as arranged between the sidewall forming portions 3 on theportion 2 and extending longitudinally of theportion 2.Ridges 57 each in the form of an upward protrusion are formed on the upper surface of the lowerwall forming portion 2 integrally therewith.Trapezoidal cutouts 6 are formed in the upper edges of reinforcing formingwalls 4 in a staggered arrangement when seen from above and spaced apart by a predetermined distance longitudinally thereof. The lowerwall forming portion 2 of thelower component member 1 is formed with aslope 7 slanting outwardly upward at each of opposite side edges of its lower surface. The sidewall forming portions 3 of thelower component member 1 have the same height as the reinforcingwall forming portions 4. Thelower component member 1 is made from an aluminum brazing sheet having a brazing material layer (not shown) on its outer surface, i.e., on the lower surface of the lowerwall forming portion 2 and on the outer surfaces of the sidewall forming portions 3. - The
upper component member 8 comprises a flat rectangular upperwall forming portion 81, and sidewall forming portions 82 extending downward from opposite side edges of the upperwall forming portion 81 integrally therewith. Theupper component member 8 is made from an aluminum brazing sheet having a brazing material layer (not shown) on its opposite surfaces by roll forming. The upperwall forming portion 81 and the sidewall forming portions 82 have the brazing material layer (not shown) on their opposite surfaces. - The flat
heat exchange tube 50 is prepared by fitting theupper component member 8 over thelower component member 1 as shown in FIG. 9, with their sidewall forming portions 82 lapping over the respective sidewall forming portions 3, inwardly bending the lower ends of the sidewall forming portions 82 into intimate contact with theslops 7 to temporarily hold the twocomponent members component members communication holes 58 are formed by closing the openings of thecutouts 6 in the reinforcingwall forming portions 4 of thelower component member 1 with the upperwall forming portion 81 of theupper component member 8. - With reference to FIG. 1, the rolling plant for producing the
lower component member 1 comprises anuncoiler 11 having wound up thereon an aluminum brazing sheet 10 (metal blank sheet) formed with a brazing material layer on one side thereof so that the brazing material layer is positioned outside, a preliminary rolling mill 12, a finishing rolling apparatus 13 and transport rolls 14. Thealuminum brazing sheet 10 on theuncoiler 11 is paid out from theuncoiler 11, fed to and passed through the preliminary rolling mill 12, and thereafter fed to the rolling apparatus 13 and thereby rolled for finishing, whereby thelower component member 1 is produced. - The preliminary rolling mill12 forms on the
aluminum brazing sheet 10 ridges corresponding to the sidewall forming portions 3 and the reinforcingwall forming portions 4. - The rolling apparatus13 comprises a
central work roll 15, a plurality of planetary work rolls 16 arranged around thecentral work roll 15 and equidistantly spaced apart circumferentially of theroll 15, and trapezoidal guide shoes 17 arranged between the adjacent planetary work rolls 16. Thecentral work roll 15 is a work roll of the invention. - With reference to FIGS.2 to 6, the
central work roll 15 comprises large and small two kinds ofdisks flanges disks large disks wall forming portions 3 and the reinforcingwall forming portions 4 on the lower component member. Thesmall disks wall forming portions 3 and the reinforcingwall forming portions 4 on thelower component member 1. Accordingly,annular grooves 23 for shaping the side wall forming portions are defined by thelarge disks 20A at the left and right ends, thesmall disks 21A at the left and right ends and theflanges annular groove 24 for shaping the reinforcing wall forming portion is defined by each pair of adjacentlarge disks small disk 21B therebetween. - Each of the
large disks 20B other than thelarge disks 20A at the opposite ends is formed in its outer peripheral surface with a ridge shapingannular recess 25 over the entire circumference thereof. The radius of thesmall disks large disks wall forming portions 3 and the reinforcingwall forming portions 4. Thesmall disks 21B other than thesmall disk 20A at the opposite ends are each formed in the outer peripheral surface thereof with a plurality ofcutout shaping projections 26 arranged at a spacing circumferentially thereof. Since thecutouts 6 are in a staggered arrangement, one of the adjacentsmall disks 21B has itsprojections 26 arranged as circumferentially shifted from those of the other. - Opposite surfaces of the
disks flanges work roll 15 are each in the form of a vertical surface, and each pair ofadjacent disks flanges disk 21A, are in intimate contact with each other. The outer peripheral portion of each of thelarge disks projections 26 on thesmall disk 21B is tapered toward the outer peripheral edge with a gradually reducing thickness so as to render thelower component member 1 as formed easily removable from thework roll 15. - A drive shaft insertion bore (not shown) extends through both
flanges large disks small disks flanges large disks small disks left flange 22A, all thelarge disks small disks right flange 22B on the circumference of a portion thereof around the shaft insertion bore and spaced apart circumferentially. The bolt insertion bores in all thelarge disks small disks Bolts 29 inserted through thebores 27 in theleft flange 22A, all thelarge disks small disks bores 28 in theright flange 22B, whereby all thelarge disks small disks flanges - The
large disks small disks 21A at the opposite ends are prepared in the following manner. Metal plates of die steel, high-speed tool steel, cemented carbide or the like are machined by blanking or lathing to obtain disks having specified outside diameters and a drive shaft insertion bore. Each disk is then heat-treated and worked by electrical discharge wire cutting to shape a key groove forming cutout in the bored portion and shape bolt insertion bores. Subsequently, the inner periphery of the disk defining the drive shaft bore is finished by a jig grinding machine. The disk is thereafter finished over opposite surfaces by surface polishing and has its outer peripheral surface finished by cylindrical polishing. Each of the disks for thelarge disks large disks 20B other than thelarge disks 20A at the opposite ends is worked on its outer peripheral surface by profile grinding to form a ridge shapingannular recess 25. In this way, thelarge disks small disks 21A at the opposite ends are produced. - The
small disks 21B other than thesmall end disks 21A are produced in the following manner. A metal plate of die steel, high-speed tool steel, cemented carbide or the like is machined by blanking to obtain disks having a specified outside diameter and a drive shaft insertion bore. These disks are greater in radius than the disks blanked out for preparing thesmall end disks 21A by an amount corresponding to the height of thecutout shaping projections 26. The subsequent sequence of steps up to the finishing work by surface polishing and cylindrical polishing is the same as is the case with the preparation of thelarge disks small end disks 21A. The recessed portions to be present between the adjacentcutout shaping projections 26 are then formed. Finally the inner faces of the recessed portions are finished by polishing. In this way, thesmall disks 21B are produced. - Although each
small end disk 21A and thelarge end disk 20A are separate members according to the construction described, the outer periphery of thesmall end disk 21A has no cutout shaping projections and is in the form of a cylindrical face, so that the small end disk may be made integral with thelarge end disk 20A. - As shown in FIG. 2, the peripheral surface of the
planetary work roll 16 has aslope shaping portion 30 formed at each of its axial opposite ends and having a diameter increasing axially outward. The planetary work rolls 16 are coupled to thecentral work roll 15 by unillustrated gear means, such that the rotation of thecentral work roll 15 rotates all the planetary work rolls 16 at the same peripheral speed as thecentral work roll 15. Incidentally, eachplanetary work roll 16 may be provided with drive means for rotating thework roll 16 at the same peripheral speed as thecentral work roll 15. - When an
aluminum brazing sheet 10 is continuously passed between thecentral work roll 15 and all the planetary work rolls 16, thegrooves annular recesses 25 and theprojections 26 of thecentral work roll 15, and theslope shaping portions 30 of the planetary work rolls 16 are completely transferred to thealuminum brazing sheet 10, whereby thelower component member 1 having the desired configuration and as shown in FIGS. 7 to 9 is shaped. - The work roll of the invention is used as the
central work roll 15 according to the foregoing embodiment, whereas work rolls of the invention may alternatively be used as planetary work rolls 16. - Further according to the embodiment described, the article of deformed cross section to be produced is a lower component member which has upright walls on only one surface of a plate portion for use in flat heat exchangers, so that the
annular grooves - Further according to the embodiment described, a so-called satellite rolling apparatus comprising a central work roll and a plurality of planetary work rolls arranged around the central work roll has incorporated therein the work roll of the invention for use as the central work roll, whereas the work roll of the invention is usable also for usual rolling apparatus which comprise two work rolls in a pair to serve as the work roll. In the case where the article of deformed cross section to be produced has upright walls on only one side, the work roll of the invention formed with annular grooves for forming the upright walls is used as one of the pair of work rolls. In the case where the article of deformed cross section to be produced has upright walls on both sides thereof, work rolls of the invention each having annular grooves for shaping the upright walls are used as the respective work rolls of the pair.
- As described above, the work roll of the present invention for rolling apparatus is suitable as a work roll for use in rolling apparatus for producing articles of deformed cross section, such as flat heat exchange tube component members, heat sinks and lead frames, from a metal blank sheet.
Claims (6)
1. A work roll for rolling apparatus which comprises different kinds of disks having different diameters and arranged on an axis into juxtaposed layers as secured to one another, the disks of each kind being used in a specified number, each of the disks having an outer peripheral surface serving as a working surface.
2. A work roll for rolling apparatus according to claim 1 which is a work roll for use in a rolling apparatus for producing an article having a deformed cross section and comprising a plate portion, and a plurality of upright walls formed on at least one of opposite surfaces of the plate portion integrally therewith and arranged as spaced apart from one another.
3. A work roll for rolling apparatus according to claim 2 wherein large disks are arranged at respective portions not forming the upright walls, and small disks smaller than the large disks in radius by an amount corresponding to the height of the upright walls are arranged at respective portions for forming the upright walls.
4. A work roll for rolling apparatus according to claim 3 wherein the outer peripheral surface of each of the small disks is formed with projections for forming cutouts in an upper edge of each upright wall of the article of deformed cross section to be produced.
5. A rolling apparatus comprising a central work roll and a plurality of planetary work rolls arranged around the central work roll and spaced apart cicumferentially thereof, at least one of the central work roll and the planetary work rolls being a work roll according to any one of claims 1 to 4 .
6. A rolling apparatus comprising two work rolls in a pair, at least one of the two work rolls being a work roll according to any one of claims 1 to 4 .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/355,249 US6739167B2 (en) | 1998-03-31 | 2003-01-31 | Work roll for use in rolling apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8536998 | 1998-03-31 | ||
JP10/85369 | 1998-03-31 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/001596 A-371-Of-International WO1999050003A1 (en) | 1998-03-31 | 1999-03-29 | Work roll for rolling device |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/355,249 Continuation-In-Part US6739167B2 (en) | 1998-03-31 | 2003-01-31 | Work roll for use in rolling apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020062674A1 true US20020062674A1 (en) | 2002-05-30 |
Family
ID=13856811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/646,607 Abandoned US20020062674A1 (en) | 1998-03-31 | 1999-03-29 | Work roll for rolling device |
Country Status (9)
Country | Link |
---|---|
US (1) | US20020062674A1 (en) |
EP (1) | EP1114681B1 (en) |
JP (1) | JP4194241B2 (en) |
AT (1) | ATE284764T1 (en) |
CA (1) | CA2326331A1 (en) |
CZ (1) | CZ20003569A3 (en) |
DE (1) | DE69922671T2 (en) |
ES (1) | ES2233026T3 (en) |
WO (1) | WO1999050003A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102172623A (en) * | 2011-01-17 | 2011-09-07 | 重庆大学 | Magnesium alloy plate rolling device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1635964B1 (en) * | 2003-05-20 | 2008-03-05 | Showa Denko K.K. | Rolling apparatus and method of making product of miscellaneous cross section with use of same |
KR100769065B1 (en) * | 2006-05-18 | 2007-10-22 | 엘지전자 주식회사 | Heat sink of plasma display apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3616159A (en) * | 1968-11-21 | 1971-10-26 | Union Carbide Corp | Controllably oriented fibrous product |
US3648502A (en) * | 1970-03-04 | 1972-03-14 | Trane Co | Method and apparatus for forming a heat exchanger tube with closely spaced integral fins |
JPS5346262Y2 (en) * | 1975-08-20 | 1978-11-06 | ||
JPS60143926A (en) * | 1983-12-30 | 1985-07-30 | Nippon Petrochem Co Ltd | Method and apparatus for forming rugged sheet |
JPH0623602U (en) * | 1992-08-27 | 1994-03-29 | 共英製鋼株式会社 | Rolling roll for I-shaped steel |
JP3381130B2 (en) * | 1995-12-28 | 2003-02-24 | 昭和電工株式会社 | Manufacturing method of flat heat exchange tube |
AU7481694A (en) * | 1993-08-04 | 1995-03-14 | Insilco Corporation, Thermal Components Division | Radiator tube and method and apparatus for forming same |
-
1999
- 1999-03-29 JP JP2000540955A patent/JP4194241B2/en not_active Expired - Fee Related
- 1999-03-29 AT AT99910749T patent/ATE284764T1/en not_active IP Right Cessation
- 1999-03-29 ES ES99910749T patent/ES2233026T3/en not_active Expired - Lifetime
- 1999-03-29 DE DE69922671T patent/DE69922671T2/en not_active Expired - Fee Related
- 1999-03-29 CZ CZ20003569A patent/CZ20003569A3/en unknown
- 1999-03-29 CA CA002326331A patent/CA2326331A1/en not_active Abandoned
- 1999-03-29 EP EP99910749A patent/EP1114681B1/en not_active Expired - Lifetime
- 1999-03-29 WO PCT/JP1999/001596 patent/WO1999050003A1/en active IP Right Grant
- 1999-03-29 US US09/646,607 patent/US20020062674A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102172623A (en) * | 2011-01-17 | 2011-09-07 | 重庆大学 | Magnesium alloy plate rolling device |
Also Published As
Publication number | Publication date |
---|---|
DE69922671T2 (en) | 2005-10-06 |
EP1114681B1 (en) | 2004-12-15 |
DE69922671D1 (en) | 2005-01-20 |
EP1114681A4 (en) | 2003-06-11 |
WO1999050003A1 (en) | 1999-10-07 |
EP1114681A1 (en) | 2001-07-11 |
ES2233026T3 (en) | 2005-06-01 |
CA2326331A1 (en) | 1999-10-07 |
JP4194241B2 (en) | 2008-12-10 |
ATE284764T1 (en) | 2005-01-15 |
CZ20003569A3 (en) | 2001-09-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHOWA ALUMINUM CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOBAYASHI, KEIGO;INABA, NORIKAZU;TAMURA, TAKASHI;REEL/FRAME:011166/0168 Effective date: 20000901 |
|
AS | Assignment |
Owner name: SHOWA DENKO K.K., JAPAN Free format text: MERGER;ASSIGNOR:SHOWA ALUMINUM CORPORATION;REEL/FRAME:012385/0163 Effective date: 20010330 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |