JPH06320205A - Device for rolling wire rod - Google Patents

Abstract

PURPOSE:To improve the machining accuracy in the width dimension of a rolled wire rod and to improve the accuracy of rolling work by arranging a cooling device with which a rolling stand is cooled. CONSTITUTION:After rolling rolls 8, 8 are expanded by heating due to heat- generation phenomenon with rolling work and the width of a flat square wire is changed in the direction that the width is extended, the rolls are changed in the direction that the width is narrowed for long period due to the elongation in the post parts 4 of the rolling stand 3. Thus the rolling stand 3 in which the rolling roll 8, 8 are arranged is cooled by passing a liquid coolant inside the path of the cooling device 22 and kept at a fixed temp. Thus machining accuracy in width dimension of the rolled wire rod of the flat square wire is improved. Further, the rolling rolls 8, 8 are cooled with roll cooling devices 27, so thermal expansion of the rolling stand 3 and rolling rolls 8, 8 is suppressed, the variation in width dimension of the rolled wire rod is restrained and the accuracy of rolling work is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod rolling apparatus for rolling a round wire rod having a diameter of 1 mm or less into a rectangular wire.

[0002]

2. Description of the Related Art Generally, when a thin wire drawn by a wire drawing machine or the like is passed between rolling rolls arranged above and below to form a rectangular wire having a predetermined thickness and plate width, this rolling roll is It is heated by the heat generation phenomenon associated with rolling,
The rolling roll expands from the beginning of operation, and due to this expansion, the plate width of the rectangular wire changes in a direction in which it spreads out, and the accuracy of the plate width varies.Therefore, cooling is performed to keep the temperature of the rolling roll constant. A structure has been proposed.

[0003]

However, in the case of the above-mentioned conventional structure, although the structure for cooling the rolling roll is adopted, the rolling stand also expands at the same time when the rolling roll expands. After the strip width changes, the post width of the rolling stand causes the strip width to change to a narrow direction for a long period of time. There is an inconvenience that it may be caused.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and two rolling rolls are arranged on a rolling stand up and down, and a round wire rod is provided between the rolling rolls. In the wire rod rolling device for rolling into a rectangular wire through a wire rod rolling device, a cooling device capable of cooling the rolling stand is provided.

At this time, it is desirable to provide a roll cooling device capable of cooling the rolling roll.

[0006]

The rolling stand on which the rolling rolls are arranged is cooled by the cooling device and kept at a constant temperature.

[0007]

1 to 5 show an embodiment of the present invention in which a copper wire plated with tin or the like having a thickness of 4 to 6 .mu. ~ 0.3
After being drawn to 2 mm, the round wire is continuously rolled by a rolling mill to have a thickness of 0.025 mm to 0.10 mm and a width of 0.6, for example.
It is applied to a series of wire rod processing lines that are rolled into ultra-fine rectangular wire of mm to 2.5 mm, and the wire rod W of the rectangular wire that is continuously sent from the rolling mill is continuously annealed and then wound on a bobbin by the wire rod winding device. is doing.

[0008]

[Embodiment] 1 is a rolling mill, in which a rolling stand 3 made of cast iron or the like is erected on a machine stand 2, and four post portions 4 located at four corners of the rolling stand 3 are provided with bearing blocks 5 ... Two slide blocks 5 are arranged so as to be slidable up and down, and the respective bearing blocks 5 and 5 are positioned by the left and right guide plates 6 attached to the post portion 4, and the rolling rolls are mounted on the bearing blocks 5 and 5 by bearings 7. The roll shaft 9/8 of 8.8 is rotatably mounted, and the cradle 1 is provided at both ends of the roll shaft 9/9
0 and 10 are rotatably attached.

Then, the lower support block 5 is placed on the rolling stand 3, and the cylinders 11 for pushing up the upper support bases 10 are arranged between the upper and lower support bases 10 on the left and right sides. The nut body 12 is fixed to the upper part of the rolling stand 3, the elevating screw shaft 13 is screwed vertically on the nut body 12, the gear 14 is attached to the nut body 12, and the gear 14 has a forward / reverse push-down control (not shown). The gear 15 that rotates in the normal and reverse directions is meshed with the motor for use in the press block 1 by the action of the nut body 12 and the lifting screw shaft 13 by controlling the forward and reverse rotation of the gear 15.
The upper support block 5 is pushed down against the cylinder 11 via 6 to control the position of the rolling rolls 8.

Further, a rolling drive motor (not shown) is arranged on the machine base 2, a bearing stand 17 is attached to the machine stand 2, and two rotary shafts 18, 18 are provided sideways on the bearing stand 17. A rotary shaft 18 of the above is attached with a pulley 19 which is rotated by a drive motor (not shown), gears 20 and 20 meshing with the rotary shafts 18 and 18 are fixed, and the rotary shafts 18 and 18 are opposed to each other. The shafts 9 and 9 are connected to each other via a joint 21, and a drive motor (not shown) is used to rotate the rolling rolls 8 and 8 in the directions in which wire rods in different directions are sent backward.

Reference numeral 22 denotes a cooling device. In this case, vertical posts 23 extending in the vertical direction are formed in the four post portions 4 located at the four corners of the rolling stand 3 and face the upper wall portion of the rolling stand 3. Vertical passage 2 formed in two post portions 4
A horizontal passage 24 communicating with the vertical passage 23 is formed by the vertical passage 23 and the horizontal passage 24.
5 and two passages M having the other opening as an outlet 26 are formed, and a cooling liquid supply portion (not shown) is connected to the inlet 25 and a cooling liquid take-out portion is connected to the outlet 26.
The cooling liquid R passes through the two passages M including the horizontal passages 24, and the rolling stand 3 is cooled from the inside by the cooling liquid R.

Reference numeral 27 denotes a roll cooling device. In this case, a blind hole-shaped inner hole 28 is formed at one end of the roll shaft 9 of the above-mentioned rolling roll 8 and the delivery pipe is provided in this inner hole 28. 29 is a gap between the inner hole 28 and the inner surface of the inner hole 28.
The cooling liquid supply part (not shown) is connected to the delivery pipe 29 and the cooling liquid take-out part is connected to the folding gap 30, and the cooling liquid R is fed from the tip of the delivery pipe 29 to the inside hole 28. The cooling liquid is fed back to the tip portion and returned through the folding gap 30, and the cooling liquid R cools the rolling rolls 8 from the inside.

Since this embodiment has the above-mentioned structure, the thin wire W drawn by a wire drawing machine or the like is passed between the rolling rolls 8 arranged above and below the rolling stand 3 to have a predetermined thickness and plate. When rolling into a rectangular wire with a wide width, the rolling stand 8 and the rolling stand 3 are also heated due to the heat generation phenomenon associated with this rolling work, and the expansion of the rolling rolls 8 and 8 causes the plate width of the rectangular wire to expand. After that, due to the elongation of the post portion 4 of the rolling stand 8 · 8, the strip width changes in a narrow direction for a long time, but the rolling stand 3 on which the rolling rolls 8 · 8 are arranged has a cooling device 22, In this case, the passage of the cooling liquid R into the passage M causes the cooling liquid R to be cooled and maintained at a constant temperature. Therefore, it is possible to improve the processing accuracy of the plate width dimension of the flat wire rod. .

Further, in this case, the roll cooling device 27 can also cool the rolling rolls 8 and 8 and can suppress the thermal expansion of the rolling stand 3 and the rolling rolls 8 and 8 and thus the variation in the width of the rolled wire rod. Can be suppressed, and rolling precision can be improved.

The present invention is not limited to the structure shown in the above embodiment, and for example, as the cooling device 22, there is a structure in which a cooling pipe through which the cooling liquid is passed through the rolling stand 3 is additionally provided on the outer surface, and the cooling device 22 is appropriately provided. It is modified and designed.

In the above embodiment, the plated round wire is drawn by the wire drawing machine, and then the round wire is continuously rolled into the rectangular wire by the rolling machine. It may also be applied to a wire rod processing line for rolling a round wire into a rectangular wire.

[0017]

As described above, according to the present invention, when a wire rod is passed between rolling rolls to be rolled into a rectangular wire having a predetermined thickness and plate width, the rolling stand is heated by the heat associated with the rolling. However, the rolling stand is cooled by the cooling device and kept at a constant temperature. Therefore, it is possible to improve the processing accuracy of the strip width dimension of the rolled wire rod and improve the rolling processing accuracy. be able to.

By forming a passage through which the cooling liquid passes in the rolling stand as a cooling device, it is possible to cool from the inside of the rolling stand, and a good cooling effect is obtained.

Further, in this case, by the roll cooling device,
The rolling roll can also be cooled, the thermal expansion of the rolling stand and the rolling roll can be suppressed, and the variation in the width dimension of the rolled wire rod can be suppressed accordingly.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 is a plan sectional view of an embodiment of the present invention.

2 is a longitudinal sectional view of the embodiment shown in FIG.

FIG. 3 is a side view of the embodiment shown in FIG.

FIG. 4 is a partial side sectional view of the embodiment shown in FIG.

FIG. 5 is a partially enlarged vertical sectional view of the embodiment shown in FIG.

[Explanation of symbols]

 W Wire material R Coolant M Passage 3 Rolling stand 8 Rolling roll 22 Cooling device 27 Roll cooling device

Claims (3)

[Claims] 1. A wire rod rolling apparatus in which two rolling rolls are arranged on a rolling stand up and down and a round wire rod is passed between the rolling rolls to roll into a rectangular wire, and a cooling device capable of cooling the rolling stand is provided. A wire rod rolling device characterized by being installed. 2. The wire rod rolling device according to claim 1, wherein a passage through which a cooling liquid passes is formed in the rolling stand as the cooling device. 3. The wire rod rolling apparatus according to claim 1, further comprising a roll cooling device capable of cooling the rolling roll.