JPH03169402A - Rolling method of extremely fine square metallic wire - Google Patents

Abstract

PURPOSE:To manufacture a highly accurate extremely fine square metallic wire without generating the breakage of rolling roll and deterioration of accuracy of revolution by rolling while each of orthogonally crossed rolling rolls is in pressurized contact with each other on their inclined contact surfaces. CONSTITUTION:Since each of horizontal rolls 1 and vertical rolls 2 is brought into contact on its inclined surface 4 and pressurized contact, even if the width of rolling surface 3 is small, the thickness of the rolling rolls 1, 2 can be made thicker and the strength of rolling rolls are increased. Furthermore, since each of rolling rolls 1, 2 is pressed from the vertical and horizontal direction, eccentricity of the bearings of each of rolls 1, 2 is restrained and accuracy of revolution is improved. Therefore, since the square metallic wire 7 is uniformly rolled, warpage in the longitudinal direction of the square metallic wire isn't generated and the extremely fine square metallic wire 7 of high dimensional precision can be manufactured. Further, the breakage of the rolling rolls 1, 2 are eliminated and productivity is improved.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a method for rolling an ultra-fine square metal wire to obtain an ultra-fine square metal wire of approximately 0.1 to 0.5 mm on a side with excellent longitudinal dimensional accuracy. It is related to.

[Conventional technology]

Conventionally, a Turk's head rolling method in which four disc-shaped rolling rolls are arranged so as to butt against each other from all sides has been adopted for rolling of square metal wire.

3(a) and 3(b) respectively show the arrangement of conventional rolling rolls, and FIG. 3(a) shows the upper and lower rolling rolls (8). (8) to the left and right rolling rolls (9).
(9) has a sandwiched structure, and Figure 3 (mouth) is the top and bottom,
It has a structure in which the left and right rolling rolls α■, αΦ, αφ, αΦ are shifted in one direction and combined in a circular shape.

[The problem that the idea attempts to solve]

In the rolling process of square metal wire using the above-mentioned Turk's head rolling method, the longitudinal dimensional accuracy of the finished square wire and the minimum dimension that can be rolled are determined by how the four rolling rolls are abutted against each other.

In the structure shown in FIG. 3(A), when rolling an ultra-fine square metal wire with a side of 0.5 mm or less, for example, the upper and lower rolling rolls (8). (8) The thickness becomes 0.5 mm or less, and the strength of the rolling roll decreases.

As described above, if the strength of the rolling roll is reduced, the rolling roll may be damaged during rolling, leading to a reduction in productivity and an increase in the number of equipment.

In addition, in the structure shown in Fig. 3 (b), the rolling rolls are also pressed together during rolling, and a thrust load is applied to the bearings of the rolling rolls, reducing the rotational accuracy of the bearings and causing poor longitudinal dimensional accuracy of the finished line. There is a problem with that.

The present invention has been made to eliminate the above-mentioned problems, and it is possible to easily produce ultra-fine square metal wires with excellent longitudinal dimensional accuracy of 0.5 mm or less on each side without causing damage to rolling rolls or deterioration of rotation accuracy. The purpose is to obtain the following.

[Means to solve the problem]

The present invention provides a Turk's roll rolling method in which rolling is performed using four rolling rolls, in which each of the rolling rolls, a horizontal roll having a pair of horizontal axes and a vertical roll having a pair of vertical axes, has contact surfaces that are inclined to each other. The present invention provides a method for rolling an ultra-fine square metal wire in which the rolling surface of each logol is rolled in a rectangular rolling section while press-welding the slag.

[Effect]

In the method of rolling ultra-fine square metal wire of the present invention, each roll is pressed against the inclined surface, so even if the width of the rolling surface is small, the thickness of the roll can be increased, and the rolling roll The intensity increases. Furthermore, since the same rolling rolls are pressed against each other from above, below, and from the left and right, eccentricity of the bearings of each rolling roll is suppressed, and rotation accuracy is improved.

Therefore, since the square metal wire is uniformly rolled, warpage in the longitudinal direction of the square metal wire does not occur, and an extremely thin square metal wire with good dimensional accuracy can be manufactured. moreover,
Breakage of rolling rolls is eliminated, productivity is improved, and equipment costs can be reduced.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

〔Example〕

As shown in FIG. 1, (1) is a horizontal roll having a horizontal axis, and is arranged as a pair of upper and lower rolls. (2
) are vertical rolls having vertical axes, and are arranged in pairs on the left and right.

Each of the above roles (1). (2) is shaped over the entire circumference so that the rolled surface (3) is parallel to the axis. In addition, between both ends of the rolling surface (3) and the side surface of the roll, a contact surface (4) that slopes outward in the axial direction from both ends toward the side surface is formed symmetrically over the entire circumference. ing.

Four rolls (1) that were FIJt performed as above. (
2) are arranged so that the contact surfaces (4) formed thereon are in contact with each other, and a rectangular rolling space (5) is formed by the rolling surface (3) of each rolling roll.

The metal wire (6) is guided into the rolling space (5) shaped as described above as shown in Fig. 2, and the ultra-fine metal wire (7) is formed by drawing and cutting out the metal wire (6). It is something to be processed.

In the above embodiment, the metal wire was processed by drawing it out, but it is also possible to perform the rolling process by actively driving the rolling rolls.

Further, as the metal wire (6), a nine-wire wire or a square wire processed to be thinner than the nine-wire wire may be used.

Further, although the rolling space (5) is shown as being square, horizontal rolls Q), (1) and vertical rolls (2). It is also possible to make it rectangular by varying the width of the rolling surface (3) in (2). Also, the inclination angle α of the contact surface 0) is 45
° is preferable in terms of dispersion of the pressure contact force of the rolling rolls, but
It can also be in the range of 30' to 60°.

〔Effect of the invention〕

The method of rolling ultrafine square metal wire of the present invention allows the thickness of the rolling orifice to be made thicker than the width of the rolling surface, thereby increasing the strength of the rolling roll. For this reason, the occurrence of damage to the rolling rolls during rolling has been greatly reduced.

Moreover, the width of the rolling surface can be made extremely small without reducing the thickness of the rolling roll.
It is possible to roll ultra-fine square metal wires.

Furthermore, since the rolling rolls are in pressure contact on an inclined surface,
Eccentricity of the rolling rolls and their bearings is suppressed, and the longitudinal dimensional accuracy of the rolled ultra-fine square metal wire is 0.002 to 0.02.
This invention has a great effect in that it is possible to obtain a square metal wire of excellent quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing one embodiment of a rolling roll used in the method of rolling an ultra-fine square metal wire of the present invention, and FIG. 2 shows an example of the rolling state of the ultra-fine square metal wire of the present invention. 3A and 3B are schematic explanatory views showing different arrangements of conventional rolling rolls, respectively. (l)...Horizontal roll (2)...
... Vertical roll (3) ... Rolling surface (4) ... Contact surface (5) ... Rolling space (6) ... Metal wire (7 )・・・Extra fine metal square wire

Claims (1)

[Claims] In the Turk's roll rolling method in which rolling is performed using four rolls, each of the rolls, a horizontal roll having a pair of horizontal axes and a vertical roll having a pair of vertical axes, presses the inclined contact surfaces of each roll. 1. A method of rolling an ultra-fine square metal wire, characterized in that rolling is carried out in a rectangular rolling section formed by a rolling surface.