JPH05138208A - Method for connecting rolled stock - Google Patents

Abstract

PURPOSE:To easily connect preceding rolled stock and succeeding rolled stock by forming projecting parts on either of the rear end of the preceding rolled stock or the front end of the succeeding rolled stock, forming recessed parts in the corresponding positions of the other and advancing the projecting parts into the recessed parts, thereby crushing and bulging the projecting parts. CONSTITUTION:A proper working device moving together with a hot rolling line is provided. The projecting parts 11 are formed on either of the rear end 1 of the preceding rolled stock and the front end 2 of the succeeding rolled stock and the recessed parts 12 are formed in the corresponding positions of the other by this device. The succeeding stock 2 is made to follow up the preceding stock 1 to advance the projecting parts 11 into the recessed parts 12. The projecting parts 11 are crushed and bulged by the pressing device moving at the same speed as the speed of the rolled stock. As a result, the projecting parts and the recessed parts are indisconnectably engaged and the preceding stock and the succeeding stock are connected. The registration is easier than the conventional methods and the shape dimensional accuracy of the projecting parts and the recessed parts is not so much required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a trailing end of a preceding rolled material and a leading end of a trailing rolled material in a hot rolling line.

[0002]

2. Description of the Related Art In a hot rolling line, it has been conventionally practiced to connect the trailing end of a preceding rolled material and the leading end of a following rolled material in order to continuously perform rolling work. Figure 1
5 and 16 show a conventional example for connecting rolled materials (for example, JP-A-61-2350).
No. 3), in which both the rear end of the preceding rolled material 1 and the leading end of the following rolled material 2 have a dovetail-shaped (dovetail-shaped or inverted trapezoidal-shaped) convex portion 3 and an ant engaging with it. The groove-shaped concave portions 4 are provided so as to complement each other, and the rolled materials 1 and 2 are connected by engaging the convex portions 3 and the concave portions 4 with each other.

[0003]

By engaging the dovetail-shaped convex portion 3 with the dovetail-shaped concave portion 4 as in the above-mentioned conventional example, machining them in order to surely engage them. Was required to be highly accurate. Further, when connecting the rolled materials 1 and 2 to each other, as shown in FIG. 15, both rolled materials 1 and 2 are shifted in the vertical direction, and in that state, the rolled material 1 and 2 are lengthwise and widthwise. After performing accurate alignment on the
It was necessary to engage the concave portion 4 with the concave portion 4, and a complicated mechanism therefor was required.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a connecting method capable of easily connecting rolled materials.

[0005]

SUMMARY OF THE INVENTION The present invention is a method for connecting the trailing end of a preceding rolled material and the leading end of a trailing rolled material in a hot rolling line, wherein the trailing end of the preceding rolled material to be joined is connected. And a trailing roll of the preceding rolled material and a trailing rolling of the preceding rolled material by forming a convex portion on at least one of the leading end of the trailing rolled material and the concave portion on the other side into which the convex portion can enter in the same plane. After the projections are made to enter the recesses by bringing the tips of the materials close to each other in the same plane, the tip parts of the projections that are made to enter the depressions are crushed in the plate thickness direction and bulged laterally. By doing so, the convex portion and the concave portion are engaged in a non-separable state.

[0006]

In the present invention, a pair of protrusions and recesses that can enter and leave in the same plane are formed at the ends of the rolled materials to be connected, and the protrusions are formed by bringing these rolled materials closer in the same plane. Enter into the recess. After that, the tip end portion of the convex portion is crushed and bulged laterally, whereby the convex portion and the concave portion are irremovably engaged to connect the rolled materials.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In the method of this embodiment, a convex portion 11 and a concave portion 12 as shown in FIG. 1 are formed at the rear end portion of the preceding rolled material 1 and the leading end portion of the following rolled material 2 to be connected, respectively. . The convex portion 11 and the concave portion 12 have a simple rectangular shape with their side edges parallel to each other, and the protruding dimension of the convex portion 11 is equal to the depth dimension of the concave portion 12, but the width dimension of the concave portion 12 is convex. The width of the part 11 is made slightly larger than that of the part 11 so that the projection 11 can freely enter and retract in the recess 12 in the same plane as shown in FIG. They can be freely disengaged without engaging with each other only by advancing.

A recess 13 having the same shape and size as the recess 12 is formed between the projections 11 of the preceding rolled material 1.
Between the recesses 12 of the trailing rolled material 2, the protrusions 14 having the same shape and size as the protrusions 11 are formed. As a result, FIG.
As shown in, when the convex portion 11 enters the concave portion 12,
At the same time, the convex portions 14 enter the concave portions 13 and the convex portions 1
Since the width dimensions of the concave portions 12 and 13 are larger than the width dimensions of the convex portions 11 and 14 in this state, the adjacent convex portions 11 and 14 are
A slight gap corresponding to the dimensional difference is secured between the side edges of 14.

In order to form the protrusions 11 and 14 and the recesses 12 and 13 as described above, an appropriate processing device such as a gas cutting device or a die cutting device is used, which is attached to the hot rolling line. Just keep it.

The convex portions 11 and 14 and the concave portion 12, as described above,
In order to connect the preceding rolled material 1 and the following rolled material 2 which are formed with 13, the preceding rolled material 1 and the following rolled material 2 are brought close to each other in the same plane, as shown in FIG. The convex portions 11 and 14 are inserted into the concave portions 12 and 13. In order to bring the rolled materials 1 and 2 closer to each other, as shown in FIG. 4, the feeding speed V1 of the trailing rolled material 2 in the hot rolling line is made slightly higher than the feeding speed V0 of the leading rolled material 1 Rolling material 2 should catch up with preceding rolling material 1,
In order to perform such speed control, it is preferable to control the speed of the pinch roll 30 (or gripper) for transferring the rolled materials 1 and 2.

Next, the tip portion of the convex portion 11 that has entered the concave portion 12 and the tip portion of the convex portion 14 that has entered the concave portion 13 are pressed by a pressing device 31 shown in FIG. It is crushed in the thickness direction, and the tip portions of the convex portions 11 and 14 are bulged laterally within the above-mentioned gap. As a result, as shown in FIG. 3, the bulged portions are engaged with each other and cannot be separated, and the rolled material 1,
The two are connected.

When pressing with the pressing device 31, as shown in FIG. 4, the pressing device 31 is moved between both rolling materials 1 and 2 at the same speed V0 while running. . Further, an appropriate pressing device may be used as the pressing device 31, and for example, the convex portion 1
Pressing two spots on both sides of the tip of Nos. 1 and 14 in a circular shape as shown in FIGS. 5 and 6, or pressing the portion into a quadrangular shape as shown in FIGS. 7 and 8. It is also possible to freely adopt an appropriate type, such as the one shown in FIGS. 9 and 10, or the one in which the entire tip portions of the convex portions 11 and 14 are pressed so that the central portion is depressed.

According to the above-mentioned method, the projections 11 and 14 are formed only by bringing the rolled materials 1 and 2 having the projections 11 and 14 and the recesses 12 and 13 close to each other in the same plane.
Since the rolled materials 1 and 2 can be made to enter the inside, it is not necessary to shift the rolled materials 1 and 2 in the vertical direction as in the conventional case, and a complicated mechanism therefor is unnecessary. Also, in the past,
At the time of connection, it was necessary to shift the rolled materials 1 and 2 in the vertical direction and then perform positioning with high accuracy in the lengthwise direction and the widthwise direction thereof. It is sufficient to roughly perform the positioning in the width direction within the range of the space secured between the first and the second positions.

The shapes and dimensions of the convex portion and the concave portion, and the number of them installed are such that the convex portion can enter the concave portion in the same plane.
Moreover, the convex portion and the concave portion 1 can be formed only by crushing the tip portion of the convex portion.
It is arbitrary as long as it is possible to engage with 2 and 13, and by securing an appropriate gap (clearance) between them, processing accuracy with respect to the convex portion and the concave portion is not required to be so strict. Further, in the above embodiment, the concave portion and the convex portion are formed on both the trailing end portion of the preceding rolled material and the leading end portion of the trailing rolled material, but only the convex portion is formed on at least one of them. However, it is sufficient to form only the concave portion on the other side.

FIGS. 11 and 12 show an example in which the dovetail-shaped recess 20 is adopted. In this case, as shown in FIG. 11, a rectangular convex portion 21 is provided in the dovetail-shaped recess 20. After entering, the ridges 21 are crushed and laterally bulged as shown in FIG. 12, whereby the ridges 21 and the recesses 20 can be engaged and connected.
13 and 14 show an example of the case where the T-shaped concave portion 22 is adopted, and in this case also, in this case, a rectangular convex portion is also formed in the T-shaped concave portion 22 as shown in FIG. After inserting 23, as shown in FIG. 14, the tip portion of the convex portion 23 can be crushed and bulged to the side to be connected.

[0017]

As described above in detail, in the connecting method of the present invention, the convex portion and the concave portion formed at the end portions of the rolled material to be connected are formed in the same plane so that they can enter and leave, Since the end portions of the convex portions are crushed after entering the portions into the concave portions and bulged laterally to engage them, there is no need to shift the rolled material to be connected in the vertical direction, Therefore, there is an advantage that a complicated mechanism therefor is not necessary, the positioning at the time of connection is facilitated, and the accuracy of the shapes and dimensions of the convex portion and the concave portion is not so strict.

[Brief description of drawings]

FIG. 1 is a diagram showing shapes of a convex portion and a concave portion formed on an end portion of a rolled material for carrying out a connecting method according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which a convex portion has entered a concave portion in the same method.

FIG. 3 is a diagram showing a state where the tip portions of the convex portions are pressed and connected in the same method.

FIG. 4 is a diagram showing a step of pressing a convex portion in the same method.

FIG. 5 is a diagram showing an example of a press form of a convex portion in the same method.

6 is a view taken along line VI-VI in FIG.

FIG. 7 is a diagram showing another example of a press form of convex portions in the same method.

FIG. 8 is a view taken along the line VIII-VIII in FIG.

FIG. 9 is a diagram showing still another example of the press form of the convex portions in the same method.

10 is a view taken along line XX in FIG.

FIG. 11 is a diagram showing another example of the shapes of the concave portion and the convex portion.

FIG. 12 is a view showing a state where the convex portion is engaged with the concave portion.

FIG. 13 is a diagram showing still another example of the shapes of the concave portion and the convex portion.

FIG. 14 is a view showing a state where the convex portion is engaged with the concave portion.

FIG. 15 is a diagram showing a conventional connecting method.

FIG. 16 is a diagram showing rolled materials connected by a conventional connecting method.

[Explanation of symbols]

 1 Leading rolled material 2 Trailing rolled material 11, 14 Convex portion 12, 13 Recessed portion 20, 22 Recessed portion 21, 23 Convex portion

Claims (1)

[Claims] 1. A method for connecting the trailing end of a preceding rolled material and the leading end of a trailing rolled material of a hot rolling line, wherein the trailing end of the preceding rolled material and the leading end of the trailing rolled material are to be connected. A convex part is formed on at least one of the two, and a concave part is formed on the other side so that the convex part can enter in the same plane. After bringing the convex portion into the concave portion by approaching the concave portion, the tip portion of the convex portion that has entered the concave portion is crushed in the plate thickness direction and bulged laterally to form the convex portion and the concave portion. A method for connecting rolled material, characterized in that the rolled material is engaged in a non-separable state.