Classifications

• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N60/00—Superconducting devices
  • H10N60/01—Manufacture or treatment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
  • B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
• • 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
  • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
• • 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
  • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
• • 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
  • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
• • 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
• • 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
  • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
  • B21C37/042—Manufacture of coated wire or bars
• • 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
  • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
  • B21C37/045—Manufacture of wire or bars with particular section or properties
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N60/00—Superconducting devices
  • H10N60/01—Manufacture or treatment
  • H10N60/0268—Manufacture or treatment of devices comprising copper oxide
  • H10N60/0801—Manufacture or treatment of filaments or composite wires
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

• the present invention relates to a method of rolling superconducting conductor lengths by use of a roller device having two mutually opposed rollers, and wherein the two rollers are operated in such a manner that the superconducting conductor length is pulled in between the rollers and hereby rolled.
• tubes of a metallic base material are often used, which tubes are filled with a superconducting powder material such as a ceramic powder that may, following a given process, be formed to constitute a core of superconducting material in the metallic tube.
• a superconducting powder material such as a ceramic powder that may, following a given process, be formed to constitute a core of superconducting material in the metallic tube.
• deformation of the metallic tube is often effected to obtain a tape or a thin wire, ia with a view to obtaining adequate density, and that the individ- ual grains in the superconducting powder material are orientated such as to allow optimal utilisation of the superconducting properties of the powder material.
• an apparatus which, in stead of using a planar piston as described above, uses a piston having a curved piston surface with a vary large radius of curvature, and which, by use of a drive mechanism intended therefor, is caused to follow a movement which takes the piston surface across the conductor length in a stepwise process.
• Use of this apparatus reduces the undesired edge effects while simultaneously a deformation process with substantially planar pressing is accomplished.
• this undesired effect may ia also mean that the orientation of the individual grains in the powder material is not nearly to the same extent the same, which further reduces the power capacity of the conductor and deteriorates its mechanical strength.
• the object of the present invention to provide a method of manufacturing supercon- ducting conductor lengths whereby the conductor lengths can be worked in a continuous rolling process in a given roller apparatus, said process simultaneously yielding superconducting conductor lengths with improved superconducting properties.
• the roller device described herein is flexible with regard to effective roller radius.
• Large radius modifications of up to above factor-three radius modifications can be obtained simply by exchanging the annular rollers.
• such modification would entail significant structural modifications.
• Small modifications in the roller radius can be obtained by deforming the annular rollers elastically to accom ⁇ plish an elliptic shape. This can be obtained by mounting additional rollers, cf Figure 3. This is not an option in a conventional roller apparatus.
• annular roller system It is a further advantage of an annular roller system that it is possible to modify the rigidity of the system by the choice of material for either the annular rollers or the pressure device by which the roller effect is ac- complished.
• the rigidity of the annular roller system described herein can also be increased far more than a conventional roller apparatus having the same roller radius. This is due to the substantially reduced distance between the two pressure devices by which the roller effect is accomplished.
• the pressure device used is at least one roller which abuts on the track, and wherein the track faces towards the axes of rotation of the roller bodies.
• At least one pressure device is particu- larly advantageously operated with a view to rotating the roller body which is in abutment on the pressure device, since the pressure device hereby also serves as operating wheel for the annular or tubular roller body.
• the pressure devices can be arranged in different manners in accordance with the track on the annular or tubular roller bodies.
• one pressure device is used for each roller body, said pressure device being arranged to be in abutment on the track on the roller body at that level of the roller surface plane which abuts on the superconducting conductor section during the rolling process proper.
• the invention relates to a roller apparatus which is particularly suitable for rolling elements of even thickness and which is thus particularly suitable for use in the above described method wherein the roller apparatus comprises two roller bodies that are arranged opposite each other whereby the roller bodies form opposed roller surface planes, and wherein the two roller bodies are driven around in such a manner that the element to be rolled is drawn in between the roller surface planes by the friction generated between the element to be rolled and the roller surface planes.
• GB patent No 1 251 916 discloses a roller arrangement for rolling elements of varying thickness. This roller device uses roller rings with a roller surface plane which is excentric relative to the point of rotation of the roller ring which disqualifies such arrangement for rolling elements of even thickness.
• roller arrangements for rolling elements of even thickness that it is relatively difficult in connection with eg the rolling of superconductors of the above-described type to simultaneously obtain a large rolling diameter and a high abutment pressure without this having adverse effects in the form of undesired deformations in the roller.
• the undesired deformations in the roller can thus be in the form of flexing of a relatively wide roller whereby there is a risk that the roller surface planes meet before a satisfactory roller pressure is obtained, or in case of relatively short, substantially disc-shaped rollers where there is a risk that the roller flexes sideways and out of the disc plane. This is inexpedient since it renders control of the rolling process more difficult, and in particular it may result in an uneven thickness being imparted to the element being rolled at the two side edges of the rolled conductor.
• the roller bodies according to the invention comprise at least two annular or tubular roller bodies of substantially even thickness; and wherein the annular or tubular roller bodies are further provided with surface planes that form a track which is concentric relative to the roller surface plane; and wherein the roller appara- tus has a pressure device which is intended for abutment on the track in such a manner that the roller surface planes are pressed towards each other; and wherein the pressure device is configured and arranged in such a manner that the pressure device is in abutment on only a fraction of the track on the annular or tubular rollers.
• rollers can be used the length of which is very short while, simultaneously, very large rolling diameters are obtained; and wherein the distance from the centre of the operating shaft may still be substantially smaller than the radius of the roller body. Since far more rigidity is hereby obtained with regard to undesired deformations in the roller proper, a more even distribution of the material in the finished superconductor is hereby ob- tained.
• roller bodies can readily be exchanged in the roller apparatus with a view to rolling with differ- ent diameters, the nature of surfaces, etc, while simultaneously enabling ready use of conventional roller apparatuses in such rolling processes, despite the fact that such roller apparatuses are usually provided with rollers having relatively small diameters and are structurally modified or adjusted only with difficulty to rolling with rollers having relatively large diameters.
• exchange of the annular or tubular roller bodies can often be carried out without necessitating adjustment of the roller apparatus.
• the roller apparatus can be configured such that the annular or tubular roller bodies have an outer diameter at the roller surface plane which is at least three times larger than the width of the roller surface plane.
• annular or tubular roller device can have an outer diameter at the roller surface plane which is at least three times larger than the outer diameter of the pressure device.
• Figure 1 is an explanatory sketch of a roller device ac- cording to the invention, seen in a lateral view;
• Figure 2 is an explanatory sketch of the roller device shown in Figure 1, seen in a front view, ,:
• FIG. 3 is an explanatory sketch showing an alternative embodiment of the invention.
• Figure 1 illustrates a roller apparatus 1, said roller apparatus 1 consisting of a motor housing 2 in which a motor is arranged for driving the functions of the roller apparatus 1.
• the roller apparatus comprises a gear housing 3 in which a gear is located which is operated by the motor in the motor housing 2 and thus drives two driving shafts 4,5 around.
• the driving shafts are connected to two rolls 6,7 that are rotatably embedded about the axes of symmetry 19,20 in two frame parts 8,9 that are permanently mounted on the roller apparatus 1.
• annular roller body 10,11 are also shown, in sectional views, these roller bodies being circular and having the axes of symmetry designated by the reference numerals 12 and 13.
• the annular roller bodies thus extend around the rolls 6,7, and the annular roller bodies have tracks 14,15 at their internal periphery whereby the rollers 6,7 will, when driven round via driving shafts 4,5, be caused to abut on the tracks 14,15 provided an element to be rolled is introduced between the roller surface planes 17,18 that delimit the area 16.
• Figure 2 illustrates the same roller arrangement as in Figure 1, only in a front view, from which it will appear that in this embodiment only one roll 6,7 is arranged for each of the annular roller bodies 10,11.
• This configuration is particularly convenient since it allows for the use of an entirely conventional roller apparatus 1 which can, without structural modifications, be provided with the two annular roller bodies 10,11.
• the rolls 6,7 can be conventional rollers and that the tracks 14,15 on the annular roller bodies 10,11 can be substantially smooth surfaces.
• a conventional roller apparatus which has been provided with annular roller bodies 10,11 retains its usual options for adjustment, in particular with regard to regulating the distance between the roller surface planes, substantially without limitations.
• the rolls 6,7 can be provided with eg toothed wheels or other driving wheels provided the tracks 14,15 on the an- nular roller bodies are provided with suitable surfaces for abutment on the rolls 6,7.
• Figure 3 illustrates an alternative embodiment in which several rolls 6, 7, 6a, 7a are arranged at each of the annular roller bodies 10,11.
• this presupposes a modification of a conventional roller apparatus which is, of course, to be provided with suitable journalling means for the extra rolls.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Superconductors And Manufacturing Methods Therefor (AREA)
• Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (2)

Family

ID=8098412

Family Applications (1)

Country Status (10)

Families Citing this family (1)

Citations (3)

• 1998
  • 1998-07-14 CN CN98807253A patent/CN1264497A/zh active Pending
  • 1998-07-14 WO PCT/DK1998/000328 patent/WO1999007025A2/en not_active Application Discontinuation
  • 1998-07-14 NZ NZ501977A patent/NZ501977A/en unknown
  • 1998-07-14 SK SK38-2000A patent/SK382000A3/sk unknown
  • 1998-07-14 EP EP98933573A patent/EP1021841A2/en not_active Withdrawn
  • 1998-07-14 CA CA002296388A patent/CA2296388A1/en not_active Abandoned
  • 1998-07-14 KR KR1019997012631A patent/KR20010014437A/ko not_active Application Discontinuation
  • 1998-07-14 JP JP2000505657A patent/JP2001512053A/ja active Pending
  • 1998-07-14 AU AU83343/98A patent/AU732623B2/en not_active Ceased
• 2000
  • 2000-01-13 NO NO20000174A patent/NO20000174L/no not_active Application Discontinuation

Patent Citations (3)

Non-Patent Citations (1)

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