JPS5837131A - Selectively cooling device for one side edge part in continuous annealing - Google Patents

Abstract

PURPOSE:To always selectively cool a prescribed position on one edge part of a steel band even if plate width of the steel band is varied, by subjecting a titled device to follow displacement toward the lateral direction of one edge part of the steel band by a profiling driving device, while basing on detection of the plate end of the steel band under processing. CONSTITUTION:When a steel band 4 heated and soaked in a heating zone 1 and a soaking zone 2, respectively, is cooled in a cooling zone 3, a prescribed length part from one side edge part of the steel band is selectively cooled by a selectively cooling device 7. A prescribed temperature difference is given to the part to be cooled against other non-cooled part, and one side edge part obtains length longer than other part by prescribed length. That is to say, length of the steel band differs in the width direction. In this state, the plate end of the steel band 4 is detected, and by its signal, a profiling driving device 9 for moving toward the plate width direction, for instance, a cylinder is operated, and the device 7 is moved. Accordingly, even if the steel band 4 walks, or the width is varied, a prescribed position of one side edge part can be selectively cooled exactly. As a result, wound coil obtains a tension distribution in the width direction of the steel band.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a selective cooling device for selectively cooling one side of a copper strip in the width direction during continuous annealing of the copper strip to obtain a coil with different tension distribution in the width direction. It is something.

Cold-rolled steel sheets are annealed to remove strain caused by cold rolling, adjust mechanical properties, or adjust composition and crystallization. When this annealing is GEX annealing, the coil is placed in a furnace and annealed so that the winding axis direction is vertical.

At this time, distortion occurs due to the coil's own weight at the lower end (hereinafter referred to as the side edge) of the coil in contact with the plywood in the annealing furnace.

This distortion seriously reduces the commercial value of the copper belt.

In particular, when the steel strip is an electromagnetic steel plate, it is used in a laminated manner, resulting in a thick surface failure, and the side edges where the distortion occurs are cut off.

In order to reduce the distortion of this side edge, it has been proposed in the past, for example, in Japanese Patent Publication No. 52-13168, when the coil is annealed, the copper strip is cut in advance along one side edge. This is wound into a coil, and then placed in an annealing furnace with the notch side edge of the coil facing down on the bed plate.
A method of annealing is shown.

In Japanese Patent Publication No. 52-13169, prior to I-Tx annealing, when winding a copper strip into a coil shape, the edge on the D side is wound so that it forms an uneven shape, and this protruding edge is Methods have been proposed in which the side of the plywood is placed in contact with the plywood and annealed. However, these methods do not provide a sufficient effect of reducing strain on the side edges, and in practice, tI! ! It wasn't enough and problems were frequent.

As a method for reducing the distortion of the side edge portions, the present inventor, Hiro, previously proposed *ii No. 1983-64463.

The gist of this is that when performing Knox annealing, before winding into a coil, one side edge of the copper strip is subjected to a different thermal treatment, such as selective cooling, than the rest of the copper strip to create a plastic shape, and the length of the copper strip is reduced. After making the width different, this is wound into a coil, and then the coil is wound with relatively strong tension due to the difference in the length of the copper strip in the width direction.The coil is placed with the side in contact with plywood and annealed. There is a Knox annealing method for copper strip coils. According to this method, the distortion at the side edges is reduced, but in order to ensure this effect, the length of the copper strip should be made different in the width direction, and the distortion at one side edge of the copper strip should be made to be different. It is important how to carry out specific treatments such as selective cooling.

According to this patent application No. 54-64463, in order to reduce the distortion at the lower end of the coil during Knox annealing, when winding it up as a coil, the winding tension is applied only to the lower end side of the Knox annealing. It is said that it is better to increase the winding tension and keep the other parts to the same winding tension as before. For this purpose, in the cooling process of continuous annealing, which is a pre-process of Knox annealing, only one side edge in the width direction of the copper strip is selectively cooled, and that part is made into a plastic shape by thermal stress. make the lengths of By winding this copper strip, a coil having a winding tension distribution in the width direction of the copper strip as described above can be obtained.

By the way, in this method, the winding tension distribution obtained is determined by the result of the above-mentioned selective cooling. Therefore,
In order to obtain a reliable and stable distortion reduction effect, it is necessary to
- Even if the Iiyama size of the copper strip changes, it is necessary to selectively cool a predetermined one side edge portion to a predetermined length in response to the change.

The present invention provides a copper strip side edge selective cooling device adapted to this. The copying drive device is actuated by the sheet edge detection signal, and the selective cooling device is moved in the Iyama direction of the steel strip by the copying drive device, so that a predetermined position on one side edge of the copper strip is always selectively cooled. be.

Next, the present invention will be explained with reference to the drawings based on one embodiment.

Figure 1 shows the configuration of the continuous annealing line and the local cooling device installed near the entrance of the cooling zone. (1) is a heating zone,
(2) is a soaking zone, (3) is a cooling zone, and the copper strip (4) is passed through this continuous annealing line. (5) is a winding reel, and (6) is a winding reel. (7) is a selective cooling device provided in the cooling zone (3).

In Figure 2, copper strips (4) (8) are threaded in direction A.
is the plate edge detection device, and in this example, the selective cooling device (
7), and in response to the plate edge detection signal from the plate edge detection device (8), a copying drive device (9) for moving in the Iiyama direction, for example, a cylinder, is activated according to the plate edge detection signal from the plate edge detection device (8) or the movement of the plate edge. Activate the selective cooling device (7) to advance or retreat toward Iiyama so that it always follows the same position as the plate end. This cylinder (9) connects the moving frame (10) and the selective cooling device (7), so that the gas blowing header and nozzle provided in the selective cooling device (7) are always fixed from the plate end. Spray the cooling bus at the location. The connection position of the frame (10) and the selective cooling device (7) is circular, and can be set at any position from the edge of the plate. (11
) operates the cylinder (9) in response to the plate end detection signal inputted by the cylinder control device.

Next, selective cooling of the minus side edge of the copper strip (4) in the present invention will be described. The copper strip (4) is heated in the heating zone (1) and soaked at, for example, 800 to 900° C. in the soaking zone (2).

Next, in the cooling zone (3), the copper zone (4) is
A selective cooling device (7) to which refrigerant is fed in the B direction from the time when the steel strip (4) is cooled to ~750°C selectively cools a portion of the steel strip (4) 50 to 150 inches from the negative edge. This selected cooled spot is not cooled -) compared to 9 spots about 70
A temperature difference of about ~150° C. is applied, and this selectively cooled one side edge is 0.1 to 0.7 inches longer than the other edge. That is, the length of the copper strip (4) differs in the width direction.

In the present invention, the plate edge of the copper strip (4) is detected and the selective cooling device (7) is moved based on the plate edge detection signal. Even if the Iiyama size of the band (4) changes, a predetermined position on one side edge can be reliably selectively cooled.

As a result, the coil wound up by the take-up reel has a tension distribution in the width direction of the copper strip.

The selective cooling method may be one in which the refrigerant is directly sprayed as in the above embodiment, or one in which the refrigerant is indirectly cooled by passing the refrigerant through a tube or channel closed to the atmosphere in the furnace. The selective cooling device (7) can be moved depending on the concept.

In the above embodiment, an optical type having a light projector and a light receiving element was used as the board edge detection device (8).
Other types such as capacitance type, electromagnetic type, and any other type may be used.

Also, regarding the drive method of the selective cooling device (7).

Although a method using a cylinder is shown, any method such as an electric type and a mechanical type may be used.

As a method for making the selective cooling device (7) follow the plate edge,
The plate edge detection device (8) does not necessarily need to be fixed to the same system, so it is possible to install the plate edge detection device (8) at a different position in the longitudinal direction of the continuous annealing line, or Methods of detecting the position of any other point in the direction are also included in *I] of the present technology.

According to the present invention, by constantly following the movement of the copper strip (4) and cooling a fixed position from the edge of the plate, the effect of meandering of the IJ in the Iiyama furnace of the copper strip being threaded can be reduced. Optimum selective cooling is now possible at all times without any interference.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a selective cooling device of the present invention disposed in a continuous annealing furnace, and FIG. 2 is a diagram showing an embodiment of the present invention. 1... Heating zone, 2... Soaking zone, 3... Cooling zone, 4
... steel strip, 5 ... winding reel, 6 ... winding reel, 7 ... selective cooling device, end ... sheet edge detection device,
9... Drive device, 10... Frame, 11... Cylinder control device. Patent applicant Nippon Steel Corporation Patent application representative Patent attorney Akira Aomizu Patent attorney Kazuyuki Nishidate Patent attorney Takuo Murai Patent attorney Akira Yamaguchi Engraving of drawing (no change in content) Figure 2 Procedural amendment (voluntary) ) October 1980 Otsuguchi, Commissioner of the Patent Office Shima 1) Key points 1, Indication of the incident 1981 Patent Application No. 134246 2, Title of invention Selective cooling device for m individual edges of steel strip in delayed annealing 3, Amendment Relationship with the case of the person who made the patent Applicant name (665) Shin Nippon Seiwa Co., Ltd. 4, agent (3 others) & drawings to be amended & contents of amendment Official drawings will be left behind (no change in content) . 7. List of attached documents

Claims (1)

[Claims] 1. During continuous annealing, one side edge of the steel strip is selectively cooled to obtain a coil with different winding tension distribution in the width direction.In the steel strip-side edge selective cooling device, the edge of the copper strip during threading is cooled. A plate edge detection device for detecting, a selective cooling device for cooling one side edge of the copper strip, and a tracing drive device for tracing the displacement of the steel strip edge based on a plate edge detection signal from the plate edge detection device. A selective cooling device for one side edge of a steel strip in continuous annealing, characterized in that the selective cooling device is made to follow the displacement of one side edge of the copper strip in the width direction by the tracing drive device.