JPH0114334Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a Turk's roll for regular hexagonal materials used, for example, in the production of superconducting multi-wires.

[Technical background of the invention and its problems] For example, when manufacturing a superconducting multiwire using a niobium-titanium alloy wire, as shown in Figure 1, a copper coating 1 is applied to the outside and the wire is formed into a hexagonal cross-section. A large number of niobium-titanium alloy wires 2 are bundled together and inserted into a copper pipe 3 (7 wires are shown in the figure).
In reality, the maximum number of pieces that can be inserted are inserted, and copper strip spacers are then inserted into the remaining gaps).
After reducing the diameter using a swaging machine,
The method used is to draw the wire through a die.

When forming such a niobium-titanium alloy wire having a regular hexagonal cross section, a method of drawing the wire through a die having a hexagonal cross section has conventionally been used.

However, this method had the following drawbacks.

(1) If the manufacturing of the die, especially the finishing, is difficult, and the inner wall of the die is not properly polished, the wire rod after drawing will be twisted in the length direction, making it impossible to tightly bundle a large number of wire rods.

(2) The life of the die is short.

In recent years, a forming method using Turk's rolls 6 configured to form a forming path 5 by six forming rolls 4 arranged radially surrounding a wire passage has also been proposed, as shown in FIG. However, this method requires six rolls with different forming surface widths depending on the size of the wire rod to be processed, which has the disadvantage of increasing costs. In the figure, S indicates the rotation axis.

[Purpose of the invention] The present invention was made to eliminate these drawbacks, and it has developed a Turks roll for hexagonal materials that can produce wire rods without twisting and does not require replacing all rolls for each size. The purpose is to provide.

[Summary of the invention] In other words, the Turk's roll for hexagonal materials of the present invention includes a first drum-shaped roll having two forming surfaces of equal width that intersect at an angle of 120° along the outer periphery along the rotation direction. , a second drum-shaped roll provided with two molding surfaces of equal width that are wider than the molding surface of the first drum-shaped roll and intersect at an angle of 120° along the rotation direction of the outer periphery; A pair of flat rolls each having a flat molding surface along the direction and having an overhang on at least one side thereof extending at an angle of 60° or less to the molding surface, each drum-shaped roll and The flat rolls are arranged so that the projecting portions of each of the flat rolls are
contacting different forming surfaces of the drum-shaped rolls, and the first
It is characterized in that the drum-shaped rolls are positioned between the flat rolls to form a forming path having a regular hexagonal cross section.

[Embodiment of the invention] The details of the invention will be described below with reference to an embodiment shown in the drawings.

The Turk's roll 6 shown in FIG. 3 has a first drum-shaped roll 7 provided with two molding surfaces 7a and 7b that intersect at an angle of 120 degrees along the outer periphery along the rotation direction.
and molding surfaces 8a, 8 wider than the molding surfaces 7a, 7b of the first drum-shaped roll 7 along the rotation direction on the outer periphery.
a second drum-shaped roll 8 having an angle of 60 degrees, and a second drum-shaped roll 8 having a flat forming surface 9a along the rotational direction on its outer periphery, and an overhanging portion 9c extending from the forming surface at an angle of 60 degrees on at least one side thereof. a pair of flat rolls 9 having the same diameter,
It consists of 9. These rolls 7,
8, 9, and 9 are drum-shaped rolls and flat rolls arranged on the same plane with their axes parallel to each other and their peripheral surfaces facing each other.

The projecting portions 9c of the flat rolls 9, 9 are formed on the forming surfaces 8a, 8 of the second drum-shaped roll 8 having a wide forming surface.
b, and on the other hand, the first drum-shaped roll 7 is inserted between the flat rolls 9, 9, and the peripheral and side surfaces of each adjacent roll are combined so that they are in contact with each other without any gap, and the cross section is formed. A regular hexagonal forming path 10 is formed.

In the thus configured Turk's roll 6, when forming a wire rod of a different size, for example, a smaller size than the example, a pair of flat rolls 9,
9 can be moved to the position indicated by the broken line, and the small-sized drum-shaped roll 7 to be combined with these rolls can be changed to one with a smaller circumferential width, and the cost can be reduced compared to the conventional Turk's roll.

In addition, if the sliding surface of each roll becomes worn,
It is used after polishing and smoothing the worn surface.

Note that the Turk's roll of the present invention is not limited to the embodiment shown in FIG. 3; for example, as shown in FIG.
In order to reduce the contact area between the flat rolls 9 and 10 and reduce the force required for pulling out, the extended surface of the 60° extending portion 9a formed on one side is moved further inward by θ°. The sliding contact surface may be reduced by tilting it.

[Effects of the Invention] As is clear from the above description, according to the present invention, a regular hexagonal wire rod with good characteristics can be manufactured without twisting the wire rod.

Furthermore, there is no need to replace all the rolls for each wire size, and costs can be reduced compared to conventional Turk's rolls.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a strand for producing superconducting multi-wires, Figure 2 is a cross-sectional view of a conventional Turk's roll, Figure 3 is a cross-sectional view of one embodiment of the present invention, and Figure 4 is another embodiment. FIG. 3 is a sectional view of a flat roll in FIG. 2... Niobu titanium alloy wire, 3... Copper pipe, 4... Forming roll, 6... Turk's roll,
7, 8...Drum-shaped roll, 9...Flat roll, 10
...Forming path.

Claims (1)

[Scope of utility model registration request] A first drum-shaped roll provided with two molding surfaces of equal width that intersect at an angle of 120° along the rotation direction on the outer periphery, and a first drum-shaped roll formed along the rotation direction of the outer periphery. A second drum-shaped roll is provided with two molding surfaces of equal width that are wider than the surface and intersect at an angle of 120°, and a flat molding surface is provided on the outer periphery along the rotation direction, at least one side thereof. and a pair of flat rolls each having an overhang extending from the molding surface at an angle of 60° or less, and each of the drum-shaped rolls and the flat roll is arranged so that the overhang of each of the flat rolls The first drum-shaped roll is in contact with different forming surfaces of the two flat rolls, and the first drum-shaped roll is located between the flat rolls to form a forming path having a regular hexagonal cross section. Turk's roll for hexagonal materials.