JP2002160011A - Trough device in wire hot rolling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trough device in a wire hot rolling, in particular excellent in an exchange cost of equipment at the time of trough abrasion and in a working efficiency of exchange at the time of alteration of a wire diameter in connection with a water-cooling trough and forced-cooling trough in a wire hot rolling equipment. SOLUTION: In a wire hot rolling equipment, a water-cooling trough device including a normally vertical and inversely vertical trough, capable of vertically dividing into two for water-cooling a wire during a hot rolling and capable of exchanging only nozzle part, is arranged. The water-cooling trough device is capable of exchanging only contact part in accordance with the alteration of the wire diameter and the abrasion at the contact part. And a forced-cooling trough device uniformalizing a temperature group which is generated on the surface of the wire, capable of vertically dividing into two, is arranged. The forced-cooling trough device is capable of exchanging only contact part in accordance with the alteration of the wire and the abrasion at the contact part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-cooled trough and a recuperated trough in a wire rod rolling facility, and more particularly to a trough apparatus in a wire rod rolling which is excellent in replacement equipment cost at the time of trough wear and replacement workability due to a change in wire diameter.

[0002]

2. Description of the Related Art Conventionally, as a general wire rod rolling equipment, as shown in FIG. 3, before and after a rolling mill such as an NT mill 1 and a sizing mill 2, a water cooling zone is used for the purpose of adjusting the rolling temperature of the wire rod. No. 1 water cooling zone 3, No. 2 water cooling zone 4, N
o. A recuperation trough zone 6 is provided for the purpose of eliminating the temperature group in the cross section direction of the three water cooling zones 5 and the wire rod. In the water cooling zone, a number of water cooling troughs 7 are arranged as a forward trough, a reverse trough, and a water cooling zone as shown in FIG. Further, the recuperation trough zone is constituted by a large number of recuperation troughs 8 shown in FIG.

Therefore, when manufacturing wires having different wire diameters with the same equipment, it is necessary to replace a water-cooled trough or a recuperated trough according to the wire diameter. Further, when the wire and the trough come into contact during rolling, the inner diameter wears out, and if the wear progresses or is unevenly worn, it is necessary to replace the trough. For this purpose, a conventional trough apparatus in wire rod rolling has a structure in which a cylindrical nozzle is incorporated in a header portion as shown in, for example, Japanese Patent Application Laid-Open No. 58-205613, and FIGS. There is a type which can be divided into upper and lower parts and has a fixed handle. In the former case, there is a problem that the trough replacement time is long, it is difficult to adjust the pass level, and a large space for storing the spare trough is required.In the latter case, the workability of the trough replacement work is poor, There are problems such as high equipment costs for trough replacement due to trough inner surface wear.

[0004]

As described above, FIG.
In the water-cooled trough shown in (1), the trough can be replaced manually, and the pass level adjustment is not required. However, replacing a pair of troughs manually was heavy and replacing all pairs of troughs was hard work and time consuming. In addition, for wear with a shallow inner diameter of the trough, only the inlet nozzle 9 and the outlet nozzle 10 need to be replaced. However, if uneven wear or wear progresses, not only the 9 and 10 parts but also the trough body is worn. The troughs had to be discarded. In addition, the trough is made of heat-resistant material with excellent abrasion resistance and has a complicated shape. Was.

Further, in the recuperation trough shown in FIG. 5, since the passage grooves of the wire are formed on the front and back of the upper and lower divided troughs, it is not necessary to replace the trough according to the wire diameter, and the work is only to turn the front and back. And no pass level adjustment is required. However, as with the water-cooled trough, the task of turning over the front and back manually requires heavy labor and takes a lot of time.
Furthermore, since the trough main body comes into direct contact with the wire, the trough main body wears, and if the wear progresses, the trough main body is discarded, and there is a problem that the equipment cost increases. In terms of securing spare parts, it is necessary to reserve spare parts for the entire trough device for each type, and there is a problem that an interest rate and a large space are required. An object of the present invention is to solve the above-described problems, to improve trough replacement workability and shorten the replacement work time, and to reduce replacement equipment costs and spare parts when trough wear occurs.

[0006]

Means for solving the problems of the present invention are as follows: a wire rod being rolled in a wire rolling facility can be divided into upper and lower parts for water cooling, and only the nozzle part can be replaced. In a water-cooled trough device including a large forward and backward trough, a water-cooled trough device in which only the contact portion can be replaced in response to a change in the wire diameter and wear of the contact portion. This is a recuperation trough device that can replace only the contact portion in accordance with the wear of the device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram of the entire water-cooled trough according to the present invention. As shown in this figure, the rolled wire rod is sent in the direction of arrow W, passes through the inlet nozzle 9, passes through a plurality of sleeve portions 11 and outlet nozzles 10, and is sent to the next facility. On the other hand, the cooling water is jetted from the gap 13 between the inlet side nozzle 9 and the water-cooled trough main body 12 in the wire advancing direction, and is jetted from the water-cooling nozzle main body from the injection port 14 in a direction perpendicular to the wire advancing direction. Cool the wire to be used.

On the other hand, the outer diameter of both ends of the cylindrical sleeve portion is larger than the outer diameter of the center portion. This difference in outer diameter prevents rattling in the longitudinal direction of the sleeve, and furthermore, a fixing method such as a bolt is adopted. Instead, it can be easily attached and detached by hand. Therefore, when performing a water-cooled trough replacement operation according to the wire diameter, the water-cooled trough body is kept on the ON line,
Since it is sufficient to divide and manually replace only the inlet side nozzle, the sleeve portion, and the outlet side nozzle with parts having different inner diameters, the replacement workability is considerably improved, and the replacement work time can be shortened.

The wire passing through the water-cooled trough contacts only the inlet nozzle, the sleeve portion, and the outlet nozzle, does not contact the water-cooled trough main body, and only this portion is worn. If the inlet and outlet nozzles are worn out as in the past, the water-cooled nozzle body will not wear out, and if the sleeve is replaced, the water-cooled trough body can be used permanently, and replacement equipment costs will be reduced. Significantly reduced.

FIGS. 2A and 2B are explanatory views of the entire recuperation trough according to the present invention. As shown in FIGS. 2 (a) and 2 (b), in the recuperation trough, the cassette portion 15 is fitted into the recuperation trough main body 8, and the wire entering from the direction of the arrow W is moved by the attraction portion of the cassette portion 15. It is guided and reheated while passing through the straight section and sent to the next facility.

In addition, the cassette section 15 is divided into upper and lower parts in the same manner as the recuperator trough main body and has an extremely simple outer shape in consideration of processing costs, but there is no backlash in the traveling direction of the wire rod. 15 has a structure that can be replaced by hand. When performing the recuperation trough replacement work according to the wire diameter, the recuperation trough body can be divided into upper and lower parts with the ON line, and only the cassette part can be replaced by hand with a cassette having a different inside diameter. The performance is considerably improved and the replacement work time can be reduced. For the recuperation trough wear, if only the cassette part is replaced with a new one, the recuperation trough body can be used permanently like a water-cooled trough,
Replacement equipment costs are greatly reduced. As described above, since the trough device main body does not need to be replaced, the number of spare parts can be greatly reduced.

[0012]

EXAMPLE In this example, a wire of φ5.5 to φ18 was
Rolling is performed by a wire rolling mill having a plurality of recuperative troughs on the water cooling zone of the zone and the front and rear surfaces of the sizing mill. In this case, there are two types of troughs according to the wire diameter, and the trough inner diameters are φ12 and φ22. Trough replacement according to the wire diameter is performed at the same time for multiple troughs, eliminating the need for replacement of the trough body, and replacing the water-cooled trough sleeve and recuperator trough cassette only. The work time was also greatly reduced. In addition, there is no need to replace the trough body due to abrasion, so that equipment costs can be reduced and a great effect is achieved.

[0013]

As described above, according to the present invention, the workability is improved, the work time can be greatly reduced, and the trough body is not replaced due to abrasion. To play.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the entire water-cooled trough of the present invention.

FIG. 2 is an explanatory diagram of the entire recuperation trough of the present invention.

FIG. 3 is an explanatory view showing an example of a general wire rod rolling facility.

FIG. 4 is an explanatory view of a conventional water-cooled trough.

FIG. 5 is an explanatory view of a conventional recuperation trough.

[Explanation of symbols]

 1 NT mill 2 Sizing mill 3 No. 1 water cooling zone 4 No. 2 Water cooling zone 5 No. 3 Water cooling zone 6 Recuperation trough zone 7 Water cooling trough 8 Recuperation trough 9 Inlet nozzle 10 Outlet nozzle 11 Sleeve section 12 Water cooling trough body 13 Gap 14 Injection port 15 Cassette section

Claims (2)

[Claims] In a wire rod rolling equipment, a water-cooled trough device including a forward / backward trough that can be divided into upper and lower portions for water-cooling a wire being rolled and that can only be replaced with a nozzle portion is provided. A water-cooled trough device in wire rolling, wherein only a contact portion can be replaced according to a change in wire diameter and wear of the contact portion. 2. In a wire rod rolling facility, a recuperation trough device is provided which is installed to equalize a temperature group formed on the surface of a wire and which can be divided into upper and lower portions, and a diameter of the wire rod in the recuperation trough device is changed. A reheat trough device in wire rolling, wherein only the contact portion can be replaced according to wear of the contact portion.