JP2000076942A - Manufacture of modified jelly roll and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a modified jelly-roll and its device which lower cost with respect to time, lessening winding unevenness between products, and improving winding density, with a simple work. SOLUTION: In this manufacturing method for a modified jelly-roll, a round winding core 4 is wound with plural metal sheets 2, 3 in piles, to form a modified jelly-roll 1. Here, onset portions of at least one metal sheets 2, 3 are fixed by spot-welling to the winding core 4 when the winding is started, and terminated portions of the metal sheets 2, 3 are fixed through spot-welding to lower layers of the metal sheets 2, 3 when the winding is terminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jelly roll for producing a jelly roll which is a precursor of a compound superconducting wire, such as niobium aluminum or niobium tin, used for a superconducting magnet constituting a nuclear fusion device, an accelerator or the like. A method and an apparatus therefor.

[0002]

2. Description of the Related Art Generally, superconducting magnets constituting nuclear fusion, accelerators, etc. include niobium aluminum, niobium aluminum, and the like.
Compound superconducting wires such as tin are used.

[0003] As a method of manufacturing this compound superconducting wire, a plurality of metal sheets are stacked on a core and wound up.
There is a jelly roll method in which a roll-shaped laminate (hereinafter, referred to as a jelly roll) is manufactured, and this is processed into a wire rod as a precursor.

When a niobium-aluminum compound superconducting wire is manufactured by the jelly roll method, a jelly roll obtained by winding a niobium sheet and an aluminum sheet in two turns is used as a precursor.

Conventionally, this jelly roll has been manufactured by manually winding a niobium sheet and an aluminum sheet without fixing them around the core.

Known methods other than manual work include a method of preparing two bars having a semicircular cross section and combining them to sandwich and fix a metal sheet on a flat surface.
A round bar having a vertical groove is prepared, and a method of inserting a terminal of a metal sheet into the vertical groove, or, as shown in JP-A-8-227621, in both the round bar and the metal sheet, There is a method of mechanizing winding by fixing a metal sheet with a screw.

[0007]

However, with respect to the manual method, the manual workability of the jelly roll itself is difficult, the time cost is increased, and the degree of winding between products is varied. However, there is a problem that there is a limit to the close winding property required for improving the superconducting characteristics.

In addition, a method of sandwiching a metal sheet using a bar having a semicircular cross section or a round bar having a vertical groove, and a method of fixing a metal sheet with a screw require a mechanized operation to fix the metal sheet. It's complicated and probably involves manual work.

Further, by mechanizing the winding,
Since it is necessary to perform a protrusion process to prevent the end surface of the metal sheet from protruding from the bar and a straightening process to correct the linearity of the end surface of the metal sheet to insert the end of the metal sheet into the vertical groove, it is complicated It is likely to involve complicated work and time cost.

Accordingly, an object of the present invention is to provide a jelly roll manufacturing method and a jelly roll manufacturing method capable of reducing the time cost and reducing the variation in the degree of winding between products by a simple operation, and further improving the tight winding property. To provide.

[0011]

According to a first aspect of the present invention, there is provided a jelly for manufacturing a jelly roll in which a plurality of metal sheets are superimposed on a round bar core and wound up to form a roll. In the roll manufacturing method, at the beginning of winding, at least the starting end of one metal sheet and the core are fixed, and when the winding is closed, the end of the metal sheet and the metal sheet located thereunder are fixed by spot welding. Is the way.

According to a second aspect of the present invention, there is provided a jelly roll apparatus for manufacturing a jelly roll in which a plurality of metal sheets are superimposed on a round bar core and wound up to produce a roll-shaped jelly roll.
A spot welding electrode for fixing at least a starting end portion and a core of at least one metal sheet at the beginning of winding, and a terminal end portion of the metal sheet and a metal sheet located thereunder at the time of closing the roll by spot welding. And a guide roller installed around the jelly roll so that the metal sheet is pressed down and wound while being rolled up.

According to a third aspect of the present invention, the spot welding fixation at the time of closing the winding is performed by finally winding one or more metal sheets one or more extra turns, and performing the above from the extraly wound metal sheet. It is.

According to a fourth aspect of the present invention, there is provided a flat ironing mechanism for stroking the metal sheet so that the end surface of the metal sheet fixed to the core at the start of winding is along the surface of the core. It is.

According to a fifth aspect of the present invention, the spot welding of the jelly roll is performed only near both ends in the longitudinal direction of the core.

According to a sixth aspect of the present invention, the above-mentioned jelly roll is formed from a niobium sheet and an aluminum sheet, and the precursor of the niobium-aluminum compound superconductor is manufactured by the jelly roll.

That is, the gist of the present invention is to fix the metal sheet and the core at the start of winding and to fix the metal sheet at the time of closing the roll by spot welding, and install a roller around the jelly roll. Rolling up the jelly roll while pressing and winding the sheet with a roller.

According to the above configuration, the aluminum sheet and the niobium sheet are fixed to the core by spot welding at the beginning of winding, and then the end surface of the metal sheet is rubbed by the slicking mechanism, and the aluminum sheet and the niobium sheet are fixed to the surface of the core. While being wound up, it is wound up with good tightness while being pressed down by the guide roller, and at the time of closing the roll, only one extra sheet is wound up by one or more extra turns, spot-welded on the sheet, and Joined with the same sheet. In this way, by fixing the core and the metal sheet by spot welding, the production of jelly rolls can be automatically automated, so that time costs can be reduced, and a winding mechanism and a guide roller can be used. In this case, the jelly roll is supported, so that variations in the degree of winding between products can be reduced.

[0019]

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of a jelly roll apparatus according to the present invention.

As shown in FIG. 1, a jelly roll device 1
Reference numeral 0 denotes an aluminum sheet raw roll 2r for unwinding an aluminum sheet 2 serving as a material of a niobium-aluminum compound superconducting wire and a niobium sheet raw roll 3r for unwinding a niobium sheet 3, and these metal sheets 2, 3 and a metal sheet 2,
3 and a spot welding electrode 5 for spot welding the core 4 or the metal sheets 2 and 3 with each other, and the end faces of the metal sheets 2 and 3 fixed to the core 4 at the start of winding along the surface of the core 4. A squeezing mechanism 9 for smoothing the metal sheets 2 and 3 in order to squeeze the metal sheets 2 and 3 and a pressing mechanism 9 for pressing the metal sheets 2 and 3 against the core 4 at the time of winding up; The jelly roll 1 is mainly formed by a guide roller 7, and the jelly roll 1 is formed around the core 4.

Between the aluminum sheet raw roll 2r and the niobium sheet raw roll 3r and the jelly roll 1, the leading ends of the metal sheets 2 and 3 are guided to predetermined positions of the jelly roll 1, respectively. , A clamp feeder 6 is provided movably. In addition, behind the clamp feeders 6, metal sheets 2, 3 are provided.
Is provided on each of the cutters 8 for cutting the pieces into a predetermined length.

The winding core 4 is formed of metal so as to be spot welded to the metal sheets 2 and 3, and both ends are fixed by a rotating chuck (not shown).

The stroking mechanism 9 is composed of a roller, a plate, or the like, and is provided on the winding start side of the jelly roll 1 so that the end surfaces of the metal sheets 2 and 3 extend around the core 4. Spot welding can be performed with the end faces of the sheets 2 and 3 and the core 4 in contact with each other.

The spot welding electrodes 5 are made of metal sheets 2 and 3
In order to perform spot welding while the end of the core 4 is pressed against the core 4, the core is provided behind the stroking mechanism 9, and spot welding can be performed at two locations near both ends in the longitudinal direction of the core 4. Is configured.

The guide roller 7 is provided on the winding closing side of the jelly roll 1 and its axis is arranged parallel to the axis of the jelly roll 1 so that pressure can be uniformly applied to the surfaces of the metal sheets 2 and 3. Have been.

Next, a method for manufacturing the jelly roll 1 according to the present invention will be described with reference to FIGS.

In manufacturing the jelly roll 1,
First, as shown in FIG. 1, the clamp feeder 6 is moved so that the end face of the niobium sheet 3 comes into contact with the core 4, and then spots are formed near both ends in the longitudinal direction of the core 4 as shown in FIG. 2. The welding electrode 5 is moved, and the core 4 and the niobium sheet 3 are moved.
And fix it by welding. Thereafter, the end face of the niobium sheet 3 is rubbed with a roller (stroking mechanism 9) so as to follow the core 4 and the guide roller 7 presses the niobium sheet 3 against the core 4 and winds it one layer while tightening. . Next, as shown in FIG. 3, the end face of the aluminum sheet 2 is moved by the clamp feeder 6 and rolled up. After winding up the niobium sheet 3 and the aluminum sheet 2 by a predetermined amount, the aluminum sheet 2 is cut by a cutter, and only the niobium sheet 3 is further wound by one layer. And
As shown in FIG. 4, spot welding is performed, and the jelly roll 1 of niobium aluminum is manufactured by welding and fixing to the lower niobium sheet 3 and stopping the winding.

As described above, since the starting end of the metal sheet and the core 4 and the end of the metal sheet and the lower metal sheet are fixed by spot welding, the jelly roll 1 is fixed.
Can be automatically mechanized, and time costs can be reduced. Further, since the niobium sheet 3 and the aluminum sheet 2 are rolled up while supporting the jelly roll 1 by the wiping mechanism 9 and the guide roller 7, variations in the degree of winding between products can be reduced, and the jelly having excellent tight winding property can be obtained. Become a role.

The jelly roll 1 thus produced is used as a precursor of a compound superconducting wire.

In producing a niobium / aluminum compound superconducting wire from the niobium / aluminum jelly roll 1, the jelly roll 1 is inserted into a copper pipe, a single core billet is assembled, and reduced and extruded by pre-compression and hydrostatic extrusion. Then, a single core element wire is manufactured. Further, a plurality of single-core wires are inserted into a copper pipe to assemble a multi-core billet, similarly pre-compressed and isostatically extruded and drawn to finish a multi-core wire of φ0.8 mm. Thereafter, a compound forming heat treatment is performed to produce a niobium-aluminum compound superconducting wire.

In this embodiment, the cross section of the winding core 4 is formed to be round. However, by changing the shape of the chuck, the winding core 4 can be formed not only in a round shape but also in a convex shape such as a rectangle or a hexagon. Can be used, and a jelly roll corresponding to the core shape can be manufactured.

By installing three or more clamp feeders 6 of the jelly roll device 10, three or more metal sheets can be wound.

Further, in the present invention, the jelly roll 1 is wound up while being supported by a roller.
Although spot welding was able to be fixed at two places at both ends,
This spot welding is not limited to both ends.
Others may be used.

[0035]

In summary, according to the present invention, the fixing at the start of winding and at the closing of winding can be automatically mechanized, and mass production of jelly rolls and uniform quality can be achieved. Further, the tight winding property is improved.

As described above, the mass production of the niobium-aluminum compound superconducting wire becomes possible, and the quality is made uniform and the characteristics are improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a jelly roll device according to the present invention.

FIG. 2 is a view for explaining a method for producing a niobium aluminum jelly roll according to the present invention.

FIG. 3 is a diagram for explaining a method for producing a jelly roll of niobium aluminum according to the present invention.

FIG. 4 is a view for explaining a method for producing a jelly roll of niobium aluminum according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jelly roll of niobium aluminum 2 Aluminum sheet 3 Niobium sheet 4 Core 5 Spot welding electrode 6 Clamp feeder 7 Guide roller 9 Sliding mechanism 10 Jelly roll device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B21C 47/06 B21C 47/06 A 47/24 47/24 D 47/32 47/32 B B23K 11/00 561 B23K 11/00 561 C22C 21/00 C22C 21/00 A 27/02 102 27/02 102A (72) Inventor Kenichi Kikuchi 3550 Kida Yomachi, Tsuchiura-shi, Ibaraki Pref. Hitachi Cable Co., Ltd. Tsuchiura Plant (72) Invention Person Genzo Iwaki 3550 Kida Yomachi, Tsuchiura City, Ibaraki Prefecture Within the System Materials Research Laboratories, Hitachi Cable, Ltd. (72) Inventor Tamoru Kirino 1065 Kusoda, Oji, Ninomiya-machi, Haga-gun, Tochigi Prefecture Inside the Higa Plant of Hitachi AIC Co., Ltd. (72) Invention ▲ Yoshi ▼ Toshiaki Village Tochigi Prefecture Haga-gun Ninomiya-cho Okuchishita 1065 Kusakada Hitachi HIC Co., Ltd.Haga factory (72) Inventor Fujii Tochigi Prefecture Haga-gun, Ninomiya-cho Oaza Kugeta 1065 address Hitachi AIC Corporation Haga factory in the F-term (reference) 4E026 BA04 DB04 DB06 EA13 4E029 AA03 5G321 AA11 BA03 DC14

Claims (6)

[Claims] 1. A jelly roll manufacturing method for manufacturing a jelly roll in which a plurality of metal sheets are superimposed on a round core and wound up to form a jelly roll laminated in a roll shape. A jelly roll manufacturing method, comprising fixing a core and a terminal portion of a metal sheet when the roll is closed and a metal sheet positioned thereunder by spot welding. 2. A jelly roll apparatus for manufacturing a jelly roll in which a plurality of metal sheets are superimposed on a round bar core and wound up to form a roll, and at the start of winding, at least one sheet of the metal sheet is wound with the starting end portion. With the core, and
A spot welding electrode for fixing the end portion of the metal sheet and the metal sheet located thereunder by spot welding when the roll is closed, and a jelly roll for holding down and tightening the metal sheet when winding up the jelly roll when winding up the jelly roll. A jelly roll device comprising a guide roller installed around the periphery. 3. The spot welding fixing at the time of closing the winding is performed by winding one or more metal sheets one or more extra last and finally from the extra wound metal sheet.
A jellyroll device as described. 4. The jelly roll according to claim 2, further comprising a stroking / stripping mechanism for stroking the metal sheet so that the end face of the metal sheet fixed to the core at the start of winding conforms to the surface of the core. apparatus. 5. The jelly roll apparatus according to claim 2, wherein the spot welding of the jelly roll is performed only near both ends in the longitudinal direction of the core. 6. A jelly roll is formed from a niobium sheet and an aluminum sheet, and the jelly roll forms a niobium roll.
3. The jelly roll apparatus according to claim 2, which produces a precursor of an aluminum compound superconductor.