JP2733698B2 - Rolling method of extra fine metal square wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for rolling an ultrafine metal square wire having excellent longitudinal dimensional accuracy and obtaining an ultrafine metal square wire having a side of about 0.1 to 0.5 mm. .

[Conventional technology]

2. Description of the Related Art Conventionally, a turks head rolling method in which four disk-shaped rolling rolls are arranged in four-sided contact with each other is used for rolling processing of a metal square wire.

FIGS. 3 (a) and 3 (b) show the arrangement of conventional rolling rolls, respectively, and FIG. 3 (a) shows upper and lower rolling rolls (8) and (8) replaced by left and right rolling rolls (9). ), (9)
Fig. 3 (b) shows the vertical and horizontal rolls (10), (10), (10), and (10) shifted in one direction, respectively, and combined in a swastika shape. It has a structure.

[Issues to be solved by the invention]

In the rolling of a metal square wire using the above-mentioned turks head rolling method, the accuracy of the longitudinal dimension of the finished square wire and the minimum size that can be rolled are determined depending on how the four rolling rolls are butted.

In the structure shown in FIG. 3 (a), when a metal wire having a side of 0.5 mm or less is rolled, the thickness of the upper and lower rolling rolls (8) and (8) becomes 0.5 mm or less, for example. Strength decreases.

As described above, when the strength of the rolling roll is reduced, there is a problem that the rolling roll is damaged during rolling, which leads to a reduction in productivity and an increase in various facilities.

Further, in the structure of FIG. 3 (b), the rolling rolls are pressed against each other during rolling, a thrust load is applied to the bearing of the rolling roll, and the rotational accuracy of the bearing is reduced, and the longitudinal dimensional accuracy of the finished wire is deteriorated. There is a problem.

The present invention has been made in order to eliminate the above-described problems, and a very fine metal square wire having a longitudinal dimension accuracy of 0.5 mm or less on one side can be easily formed without causing damage to a rolling roll and a decrease in rotation accuracy. The purpose is to obtain.

[Means for solving the problem]

The present invention provides a turks roll rolling method for rolling with four rolling rolls, wherein each of the rolling rolls of a horizontal roll having a pair of horizontal axes and a vertical roll having a pair of vertical axes presses contact surfaces inclined to each other. It is another object of the present invention to provide a method for rolling an extremely fine metal square wire which is rolled in a rectangular rolling section formed by a rolling surface of each roll.

[Action]

In the rolling method of the ultrafine metal square wire of the present invention, since each rolling roll is in contact with and pressed against the inclined surface, even if the width of the rolling surface is small, the thickness of the rolling roll can be increased,
The strength of the rolling roll increases. In addition, since the rolling rolls are pressed from each other in the vertical and horizontal directions, the eccentricity of the bearing of each rolling roll is suppressed, and the rotation accuracy is improved.

Therefore, since the metal square wire is uniformly rolled, no warpage occurs in the longitudinal direction of the metal square wire, and a very fine metal square wire with good dimensional accuracy can be manufactured. Further, the rolls are not damaged, thereby improving the productivity and reducing the equipment cost.

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

〔Example〕

As shown in FIG. 1, (1) is a horizontal roll having a horizontal axis, which is arranged so as to form a pair of upper and lower rolls.
(2) is a vertical roll having a vertical axis, which is arranged so as to form a pair of right and left.

Each of the rolls (1) and (2) is formed on the entire circumference so that the rolling surface (3) is parallel to the axis. Further, a contact surface (4) inclined outward in the axial direction from both ends to the side surface is formed around the entire circumference between both ends of the rolling surface (3) and the side surface of the roll so as to be symmetrical. ing.

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

As shown in FIG. 2, a metal wire (6) is guided into the rolling space (5) formed as described above, and the metal wire (6) is pulled out to process the ultrafine metal square wire (7). It is.

In the above-described embodiment, the metal wire is processed by pulling out the metal wire. However, the rolling process can be performed by positively driving the rolling roll.

Further, as the above-mentioned metal wire (6), a round wire or a square wire processed to be thinner than the round wire can be used.

Further, although the case where the rolling space (5) is a square is shown, the horizontal rolls (1), (1) and the vertical rolls (2),
By making the width of the rolling surface (3) of (2) different, it is also possible to make it a rectangle. Further, the inclination angle α of the contact surface (4) is preferably 45 ° from the viewpoint of dispersion of the pressing force of the rolling roll, but may be in the range of 30 ° to 60 °.

〔The invention's effect〕

According to the method for rolling an extremely fine metal square wire of the present invention, the thickness of the rolling roll can be made thicker than the width of the rolling surface, and the strength of the rolling roll can be increased. For this reason, breakage of the rolling roll during rolling was greatly reduced.

In addition, since the width of the rolling surface can be extremely reduced without reducing the thickness of the rolling roll, it is possible to roll an extremely fine metal square wire having a side of 0.1 to 0.5 mm.

Furthermore, since the rolling rolls are pressed against each other on the inclined surface, the eccentricity of the rolling rolls and the bearings thereof is suppressed, and the longitudinal dimensional accuracy of the rolled ultrafine metal square wire is 0.002 to 0.005 mm, which is an excellent quality metal. This is an invention having a great effect that a square line can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a rolling roll used in the method for rolling a fine metal square wire of the present invention, and FIG. 2 shows one embodiment of a rolled state of the fine metal square wire of the present invention. FIGS. 3 (a) and 3 (b) are schematic explanatory views showing different arrangements of conventional rolling rolls. (1) ... horizontal roll, (2) ... vertical roll (3) ... rolling surface, (4) ... contact surface (5) ... rolling space, (6) ... metal wire (7) ... Extra fine metal square wire, (8), (9), (10) ...
Rolling roll

Claims (1)

(57) [Claims] In a turquoise rolling method for rolling by four rolling rolls, each of a horizontal roll having a pair of horizontal axes and a vertical roll having a pair of vertical axes presses mutually inclined contact surfaces. A method of rolling a fine metal square wire, wherein the rolling is performed in a rectangular rolling section formed by a rolling surface of each roll.