JPH05200473A - Orthogonal rolling method - Google Patents

Abstract

PURPOSE:To reduce elongation in a longitudinal direction and to surely enable cross rolling at the time of rolling a bar-shaped material into a tape. CONSTITUTION:A vertical roll 1 and a horizontal roll 2 are made identical in size, and the shaft 1a of the vertical roll 1 and the shaft 2a of the horizontal roll are separately orthogonal. Then, the vertical roll 1 and the horizontal roll 2 are rotated; the circumferential face 1a of the vertical roll 1 and the end face 2a of the horizontal roll 2 are respectively made a working surface, and by passing a working material 3 through the working surfaces 1a, 2a, the material 3 is continuously rolled down into a tape-like wire rod. At the time, the rotational speed of the horizontal roll 2 is set faster than that of the vertical roll 1 whose circumferential face 1a is the working surface, and the speed of the parts in press-contact with the upper and lower side of the working material 3 can be made nearly equal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for rolling a material into a tape-shaped wire rod by passing the material between a pair of rotating rolls.

[0002]

2. Description of the Related Art As a method for rolling a processed material such as a wire having a circular cross section or a wire having a rectangular cross section into a tape-shaped wire, conventionally, a pair of cylindrical rolls are arranged so that their rotation axes are parallel to each other. Then, the circumferential surfaces of the pair of rolls are used as working surfaces, and the working material is passed between the rolls to form a thin rectangular cross section or a tape shape.

Since the above method is carried out constantly, it is difficult for the processed material to greatly expand in the longitudinal direction and to be widened. Especially, in the case of rolling a metal-based superconducting material or the like, if the elongation in the longitudinal direction is large, it cracks. Occurs. Therefore, a method called a cross roll mill is also known in which the wire rod is moved in the longitudinal direction while reciprocating the roll in the width direction of the processed material to reduce the thickness.

[0004]

In the above-described cross roll mill method, by rolling in the width direction, there is little elongation in the longitudinal direction, and even difficult-to-process materials can be processed into tape without cracking. However, the deformation behavior is not constant in the longitudinal direction and the tape width varies in the longitudinal direction due to the complicated and expensive device or the reciprocating movement of the roll.

Therefore, the present applicant has previously proposed a method of passing a processed material between a pair of orthogonal rolls and rolling the processed material into a tape-shaped wire between the circumferential surface of one roll and the end surface of the other roll. As proposed, in the case of this method, if the rotation speeds of both rolls of the portion in contact with the processed material do not match, rolling becomes uneven.

[0006]

In order to solve the above-mentioned problems, the present invention arranges a pair of rollers at positions orthogonal to each other with their respective rotation axes displaced, and the circumferential surface of one roll and the roll of the other roll are arranged. Each of the end surfaces is a processing surface, and the rotation speed of the roll whose end surface is the processing surface is faster than the rotation speed of the roll whose peripheral surface is the processing surface.

[0007]

The pair of rolls are arranged at positions where the respective rotation axes are orthogonal to each other, and the work material is rolled by using the circumferential surface of one roll and the end surface of the other roll as work surfaces. That is, the wire rod is rolled into a tape shape with shear deformation in the width direction, and further, the rotation speed of the roll whose end surface is the processing surface is faster than that of the roll whose circumferential surface is the processing surface, so that uniform rolling is achieved. Will be possible.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view of an essential part of a roll rolling apparatus for carrying out the method of the present invention, and FIG. 2 is a front view of an essential part of the apparatus. The roll rolling apparatus has a shaft 1a horizontal and rotating in a vertical plane. It is composed of a vertical roll 1, a horizontal roll 2 whose axis 2a is vertical and rotates in a horizontal plane, and a backup roll 4 which forms a pair with the vertical roll 1 and which sandwiches the horizontal roll 2 and receives pressure.

The vertical roll 1 and the horizontal roll 2 have the same size, and the axis 1a of the vertical roll 1 and the axis 2a of the horizontal roll 2 are different from each other by 90 °.
That is, the axis 1a and the axis 2a are offset and orthogonal to each other.

In order to roll a processed material using the above rolling apparatus, the vertical roll 1 and the horizontal roll 2 are rotationally driven, and the circumferential surface 1a of the vertical roll 1 and the end surface 2a of the horizontal roll 2 are respectively processed surfaces. As a result, by passing the processed material 3 between the processed surfaces 1a and 2a, the processed material 3 is continuously pressed and processed into a tape-shaped wire.

Further, since the vertical roll 1 and the horizontal roll 2 have the same size, when both are rolled at the same rotation speed, the speed of the end face becomes more radially inward than the peripheral face, and thus becomes slower. As a result, the processed material 3 is rolled so that a twisted product is obtained. Therefore, in the present invention, the rotation speed of the horizontal roll 2 having the end surface 2a as the processing surface is set to be higher than the rotation speed of the vertical roll 1 having the peripheral surface 1a as the processing surface, and the upper and lower surfaces of the processed material are pressed against each other. The speeds of the parts to be moved are made approximately equal.

Further, the rolling force of this rolling mill can be controlled arbitrarily and is similar to that of a general rolling mill, except that shear stress in the width direction is added when the work material is subjected to rectangular machining. The difference is that the rotation speeds of the rolls 1 and 2 are different. Further, since the backup roll 4 is present, it acts as, and it is possible to apply a large amount of pressure.

Next, a concrete example of the rolling process will be explained. Forging steel is used as a tool material, and both the vertical roll 1 and the horizontal roll 2 have a diameter of 150 mm and a thickness of 30 mm. As shown in FIG. The vertical roll 1 is displaced downstream in the processing direction so that the inter-axis distance D becomes 10 mm,
Rotation speed of horizontal roll 2 is 90 rpm, vertical roll 1
Was set to 60 rpm.

Then, using this roll rolling device and a conventional rolling device in which a pair of rolls are arranged in parallel, a Tl-based silver-coated superconducting wire having a diameter of 0.662 mm and a length of 100 mm is used as a processing material and has a thickness of 0. The tape-shaped wire rod was manufactured by rolling to 0.14 mm, and the deformation conditions in the thickness direction, the width direction, and the longitudinal direction at that time were measured. The measurement results are shown in Table 1.

[0015]

[Table 1]

As is apparent from the measurement results, when processed by the roll rolling method according to the present invention, elongation in the longitudinal direction is about 4%, whereas when processed by the conventional method, The elongation in the direction becomes about 14%, and as a result, the roll rolling apparatus according to the present invention has a larger width.

Also, at this time, both 77K. The critical current density Jc in OT was measured. Here, the critical current density Jc was measured by the DC four-terminal method, and was a value obtained by dividing the current value when a voltage of 1 μV / cm was generated by the cross-sectional area of the superconductor core. As a result, when processed by the roll rolling method according to the present invention, 15000 A / cm ² was obtained, but when processed by the conventional rolling method, only 5000 A / cm ² was obtained. As a result, it is found that the superconducting characteristics are greatly influenced by the above-described widening process, and the present invention is more effective than the conventional device.

[0018]

As described above, according to the present invention,
The pair of rolls are arranged at positions orthogonal to each other with their rotation axes displaced, and the circumferential surface of one roll and the end surface of the other roll are used as the processing surface, and the rotation speed of the roll whose end surface is the processing surface is set. Since the rotation speed of the roll whose circumferential surface is the work surface is faster, it causes shear deformation in the width direction of the wire, which enables efficient and steady rolling of the tape-shaped wire. It is easy to obtain a tape-shaped wire rod that is uniformly rolled in the longitudinal direction.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of a roll rolling apparatus for carrying out the method of the present invention.

FIG. 2 is a front view of the main part of the device.

[Explanation of symbols]

1 ... Horizontal roll, 1a ... Circumferential surface (processing surface), 2 ... Vertical roll, 2a ... End surface (processing surface), 3 ... Processing material.

[Procedure amendment]

[Submission date] March 25, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

Further, the rolling force of this rolling mill can be controlled arbitrarily and is similar to that of a general rolling mill, except that shear stress in the width direction is added when the work material is subjected to rectangular machining. The difference is that the rotation speeds of the rolls 1 and 2 are different. Further, since the backup roll 4 is present , it is possible to apply a large amount of pressure.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014] Then, by using the the rolling device and the rolling device disposed in parallel to conventional pair of rolls, diameter 0.662Mm, the Tl-based silver to be covered superconducting wire length 100mm as a processing material, thickness A tape-shaped wire rod was manufactured by rolling to 0.14 mm, and each deformation state in the thickness direction, the width direction and the longitudinal direction at that time was measured. The measurement results are shown in Table 1.

Claims (1)

[Claims] 1. A method of passing a processed material between a pair of rolls whose rotation axes are deviated and orthogonal to each other, and rolling the processed material into a tape-shaped wire between the circumferential surface of one roll and the end surface of the other roll. In the above, the orthogonal rolls are characterized in that the rolling is performed such that the rotation speed of the roll whose end surface is the processing surface is faster than the rotation speed of the roll whose circumferential surface is the processing surface among the pair of rolls. Rolling method.