JPS60221141A - Forming equipment of metallic wire rod - Google Patents

Abstract

PURPOSE:To correct circumferential torsion of a metallic wire rod almost perfectly by providing a means that passes the metallic wire rod through a driven reel having a forming die and a guide groove, a driving reel and a straightening device continuously. CONSTITUTION:A metallic wire rod having circular sectional form is inserted in a forming die device 1 and formed to regular hexagonal sectional form. This wire rod 2 is wound once along a driven reel and guide grooves 5a, 6a of a driving reel and then wound to get on the face of the wire rod 2 on the side off from the first guide face F1 of the guide groove 5a and on the third guide face F3. Further, it is wound to come into contact with the face of the wire rod 2 on the side off from the guide face f1 of the driving reel 6 and the second guide face f2. Then, the wire rod 2 is passed through rolls 7, 8 along the guide groove of a horizontal holding roll 7 of a straightening roll device 4 and the guide groove of a vertical holding roll 8. A metallic wire rod of small torsion can be formed by this device.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention has a function of correcting twisting that occurs when a hard metal wire, such as a superconducting wire, expands and contracts while being formed through a forming die on the right side of a regular hexagonal die opening. The present invention relates to a molding processing device having the following.

[Technical background of the invention and its problems] Conventionally, as a manufacturing method for multicore superconducting wires, a wire rod with a circular cross section in which a superconducting material made of Nb-Ni is embedded in steel as a stabilizing material is converted into a wire rod with a regular hexagonal cross section. A method is known in which this is formed into a copper pipe and then incorporated into a copper pipe to reduce its area.

In order to form such a wire rod with a regular hexagonal cross section, the wire rod with a circular cross section is passed through a forming die with a regular hexagonal die opening, pulled by a draw bench, and then drawn while being formed into a regular hexagonal cross section. , and is manufactured by cutting it to the required length.

However, when forming a superconducting round wire into a superconducting wire core having a regular hexagonal cross section by such a method, for example, if the die opening of the forming die is unevenly polished,
The wire threads drawn through the forming die are twisted in the circumferential direction, and due to this twisting, when a large number of wires are bundled and assembled into a Cu pipe, it is difficult to bundle them tightly. .

In order to correct such twisting, conventionally, a long superconducting round wire is formed into a regular hexagonal cross section, drawn, cut to the required length, and then straightened using straightening rolls, or the superconducting round wire is The H method is used, in which the wire is formed into a regular hexagonal cross-section, drawn, wound onto a bobbin, and then cut to the required length while straightening rolls to straighten the twist. However, since it is difficult to pass a wire having a regular hexagonal cross section while maintaining the same apex in the guide groove of the straightening roll, there is a problem in that the twist of the metal wire cannot be completely corrected.

In addition, 60 mm is placed at the wire passing position between the forming die and the straightening roll.
A capstan device with a guide groove formed at an angle of ° is arranged, and the capstan device pulls the wire, at the same time forcibly bending the wire to a certain degree, and then passes it through straightening rolls to create a metal wire. A method of correcting the twist in the capstan has been considered, but there is a problem in that the guide groove of such a capstan causes the wire to slip and cannot provide sufficient traction force.

[Purpose of the Invention] The present invention has been made to solve the above-mentioned problems of the conventional art. It is an object of the present invention to provide a forming processing device that can almost completely correct the circumferential twist of a metal wire that occurs in the process.

[Summary of the Invention] That is, the metal wire forming processing apparatus of the present invention comprises (a) a forming die apparatus having a regular hexagonal die opening for forming a gold IA wire; (0) one straight lit portion of the die opening; the first parallel to
A driven reel having a guide groove formed around the guide surface and a guide groove having second and third guide surfaces each inclined at an angle of 60 degrees with respect to the guide surface and formed in different steps; a drive reel provided with a guide groove having a first guide surface parallel to the first guide surface and a second guide surface inclined at an angle of less than 60 degrees with respect to the first guide surface; (c) a capstan device disposed in the wire traveling direction of the device; and (c) a circumference of the metal wire pulled by the capstan device, which is disposed in the wire traveling direction of the capstan device with rotational axes orthogonal to each other. It is characterized by comprising a straightening roll device that maintains the directional position.

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

FIG. 1 is a diagram schematically showing a molding apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view of the main part along the line ■-■ in FIG. 1,
FIG. 3 is a sectional view of the main part taken along the line ■-■ in FIG. 1.

As shown in FIG. 1, the processing device of this embodiment includes a forming die device 1 having a regular hexagonal die opening, and a forming die device 1 disposed close to the exit side of the metal wire 2 formed by the forming die device 1. The main portion of the capstan device 3 is composed of a capstan device 3 and a straightening roll device 4 disposed close to the outlet side of the capstan device 3.

Although not shown, the molding die device 1 has a molding die with a regular hexagonal die opening, and is held so that the diagonal of the die opening is vertical.

The capstan device 3 consists of a driven reel 5 placed immediately after the forming die device 1 in the upper part of the figure, and a drive reel 6 placed below the driven reel 5, and is configured to double-wrap the metal wire 2 and pull it. It is composed of

Note that the metal wire 2 that has been taken off is sent out from the drive reel 6 side to the straightening roll device 4.

A driven reel 5 and a driving reel 6 of this capstan device 3
As shown in FIGS. 2 and 3, guide grooves 5a16a for guiding the metal wire 2 are formed in each of the grooves.

Further, the guide groove 5a of the driven reel 5 has a forming die assembly ff1.
A first guide surface F1 formed in one straight line part (in the vertical direction in the figure) of the die opening, and a second guide surface F2 forming an angle of 60° with respect to the first guide surface F1; It has a third guide surface F3 formed at a different level from and parallel to the second guide surface F2.

The third guide surface F3 is formed at a distance β1 corresponding to one side of the hexagon of the metal wire 2 in the vertical direction from the second guide surface F2, and is connected to the starting end of the third guide surface F3. , the distance from the first guide surface F+ is the parallel plane open circuit # of the metal wire 2
It is slightly larger than 1bu2.

Therefore, the metal wire 2 wound on the driven reel 5 is
One of the outer circumferential surfaces is regulated by the first guide surface F1 and the second guide surface F2 to face in the vertical direction, and the metal wire 2 to be wound up is connected to the surface 2a of the metal wire 2 to be wound down and the driven reel. The third guide surface F3 of No. 5 similarly restricts one of the outer circumferential surfaces to face in the vertical direction.

On the other hand, the guide surface 6a on the drive reel 6 side is on the same side as the driven reel 5 and is inclined at an angle smaller than 60'' with respect to the first guide surface f1 facing in the vertical direction and the first guide surface r1. The second guide surface consists of ``2''.

Therefore, as shown in FIG. 3, the lower-wound metal wire 2 has one surface on the outer periphery oriented in the vertical direction and guided by the first guide surface t1, and one top portion of the metal wire 2 facing the second guide surface t1. 2, it is gripped by a wedge action and exerts a traction force.

Note that if the angle formed by the first guide surface f1 and the second guide surface f2 is smaller than 20°, the metal wire 2 that comes into contact with the second guide surface
It is desirable that this angle be 20° or more, since excessive pressure will be applied to the top of the core and the core will deform.

Furthermore, the straightening roll device 4 is as shown in FIGS.
And as shown in FIGS. 5(a) and 5(b), the metal wire 2
a plurality of sets of horizontal gripping rolls 7 for gripping from the horizontal direction;
It is composed of a plurality of sets of vertical gripping wheels 8 for gripping in the vertical direction.

In these figures, (a) indicates each.

A front view of one of the rolls 7.8, (b) an enlarged sectional view of its grip.

Guide grooves 7a and 88 are provided around each of these rolls 7.8 to maintain the circumferential position of the metal wire 2 while being pulled by the capstan device 13, respectively.

The guide groove 7a of the horizontal gripping roll 7 is a vertical guide surface F.
4 and guide surfaces Fs and Fs extending at an angle of 60 degrees from both sides of this guide surface F4. Also,
The guide groove 88 of the vertical gripping roll 8 is constituted by guide surfaces f3, f<, each forming an angle of 60'' with respect to the vertical plane.

Next, a method of using the present invention will be explained.

A continuously supplied metal wire 2 with a circular cross section is passed through the die opening of the forming die device 1 and formed into a regular hexagonal cross section. Guide groove 5a.

6a k: wA After winding the driven reel 5 and the driving reel 6 once in this order, the surface of the metal wire 2 on the side away from the first guide surface F1 of the guide groove 58 of the driven reel 5 It is wound so that it rests on the third guide surface F3, and it is also wound so that it comes into contact with the surface of the metal wire @2 on the side away from the guide surface f1 of the drive reel 6 and the second guide surface f2. . After this, the metal wire 2 is further held by the horizontal gripping roll 7.
Both rolls 7.8 are passed along the guide groove 7at of the vertical gripping roll 8 along with the guide groove 88 of the vertical gripping roll 8.

As described above, the metal wire 2 is transferred to the driven reel 5 and the driving reel 6.
By winding the gold m wire 2 around each reel 5.6, the wire connecting the vertices is wound twice in the vertical direction. Compared to a capstan device that winds the metal wire 2, the twisting that occurs when the metal wire 2 passes through the capstan device 3 is significantly reduced.

Furthermore, the metal wire '4A2 that has passed through the die opening is corrected by the driven reel 5 from being twisted in the circumferential direction that occurred when passing through the die opening, and the wedge effect of the guide surfaces fl and f2 of the driving reel 6 provides sufficient traction force. After being pulled to the base, horizontal and vertical gripping rolls 7 and 8 restrict twisting in the vertical and horizontal directions.

Note that the reference numeral 9 indicates a guide roll, and a drawing device (not shown) such as a draw bench for drawing the metal wire 2 through the processing device described above is arranged in front of the guide roller 9. After the tip of the metal wire 2 passes through the guide roll 9, the tip of the metal wire 2 is held by a drawing device, and the metal wire 2 is continuously straightened.

Incidentally, according to the metal wire straightening method using the forming apparatus of this example, the metal wire straightening effects as shown in the following table were obtained.

(Leaving space below) *Each angle of 30° symmetrical across the vertical plane [Effects of the invention] As explained above, according to the metal wire forming apparatus of the present invention, a metal wire with a circular cross section can be shaped into a regular hexagon. A driven reel, a driving reel, and a horizontal gripping reel are inserted into a molding die having a die opening and molded into the same cross-sectional shape as the die opening. Since the wire is continuously passed through the rolls and the vertical gripper for straightening, it is possible to obtain a metal wire with extremely little twist under sufficient traction force.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing a molding apparatus used in an embodiment of the present invention, FIG. 2 is a cross-sectional view of the main part along the line 4 (a) and (b) are a side view of the horizontal gripping roll and a sectional view of the main part for explaining the guide groove of the horizontal gripping roll; FIG. 5 (a) and (b) are side views of the vertical gripping roll and sectional views of essential parts for explaining the guide grooves of the vertical gripping roll.・
......Metal wire 3...Capstan device 4...
・・・・・・・・・Straightening roll device 5・・・・・・・・・
... Driven reel 6 ... Drive reel 7 ... Horizontal gripping roll 8 ...
・・・・・・・・・Vertical gripping roll 9・・・・・・・・・
...Guide rolls F1 to F6, f + "f s
・・・・・・Information agent Patent attorney Satoshi Suyama - (1 other person) Figure 1 Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) (A) A forming die device having a regular hexagonal die opening for forming a metal wire; (B) A first guide surface parallel to one straight section of the die opening, and a first guide surface parallel to this guide surface, respectively. A driven reel provided with a guide groove having second and third guide surfaces inclined at an angle of 60 degrees and formed at different levels, and a first guide parallel to the first guide surface of the driven reel. a drive reel having a guide groove surrounding the surface and a second guide surface inclined at an angle of less than 60'' with respect to the guide surface, the cap being disposed in the direction in which the wire advances in the die device; (c) a straightening roll device that maintains the circumferential position of the metal wire pulled by the capstan device, which is arranged with rotational axes perpendicular to each other in the wire traveling direction of the capstan device; A metal wire forming processing device characterized by comprising: (2) The metal wire forming apparatus according to claim 1, wherein the second guide surface of the drive reel is inclined at an angle of 20 to 60 degrees with respect to the first guide surface. .